##### Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 20-F

ANNUAL REPORT

PURSUANT TO SECTION 13

OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended: December 31, 2013

Commission file number
333-155319

PETROBRAS ARGENTINA S.A.

(Exact name of Registrant as specified in its charter)

N/A

(Translation of Registrants name into English)

REPUBLIC OF ARGENTINA

(Jurisdiction of incorporation of organization)

Maipú 1, 22 S.S.
Floor

(C1084ABA) Ciudad Autónoma de Buenos Aires

República Argentina

(Address of principal executive offices)

Securities registered or to be registered
pursuant to Section 12(b) of the Act:



|                                                                                            |  |                                          
|------------------------------------------------------------------------------------------- |  | -----------------------------------------
|Title of each Class                                                                         |  | Name of each Exchange
on which Registered
|American Depositary Shares, each representing 10 Class B shares of Petrobras Argentina S.A. |  | New York Stock Exchange                  
|                                                                                            | 
|Class B shares of Petrobras Argentina S.A.                                                  |  | New York Stock Exchange*                 



|* | Not for trading, but only in connection with the registration of American Depositary Shares pursuant to the requirements of the New York Stock Exchange.
|- | --------------------------------------------------------------------------------------------------------------------------------------------------------

Securities registered or to be registered pursuant to Section 12(g) of the Act: None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: None

The number of outstanding shares of each of the issuers classes of capital or common stock as of December 31, 2013 was:

Petrobras Argentina S.A. Class B ordinary shares, nominal value Ps. 1.00 per share 2,019,236,820

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined by Rule 405 of the Securities Act.

Petrobras Argentina S.A.    Yesx    No   ̈



| | Petrobras Argentina S.A. is a well-known seasoned issuer as a successor issuer to Petrobras Energía Participaciones S.A., pursuant to
Rule 12g-3 of the Securities Exchange Act of 1934.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

If this report is an annual or transitional report, indicate by
check mark if the registrant is not required to file reports pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934.

Petrobras Argentina S.A.    Yes   ̈    No   x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the
Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days:

Petrobras Argentina
S.A.    Yes  x    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of
Regulation S-T (§232.495 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Not applicable.

Indicate by
check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of accelerated filer in Rule 12b-2 of the Exchange Act. (Check one):

Petrobras Argentina S.A.            Large accelerated
filer   ̈             Accelerated
filer  xNon-accelerated filer   ̈



| | Petrobras Argentina S.A. is an accelerated filer as a successor issuer to Petrobras Energía Participaciones S.A., pursuant to Rule 12g-3 of
the Securities Exchange Act of 1934.
|- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Indicate by check mark which basis of accounting the registrant has used to prepare
the financial statements included in this filing:

U.S. GAAP   ̈
    IFRS  x     Other   ̈

If Other has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow:

Item 17   ̈     Item 18   ̈

If this is an Annual Report, indicate by check mark whether the registrant is a shell company (as
defined in Rule 12b-2 of the Exchange Act).

Petrobras Argentina S.A.    Yes   ̈   No  x



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TABLE OF CONTENTS



|                                                                      |  |  |     | 
|--------------------------------------------------------------------- |  |  | --- | 
|Item 1. Identity of Directors, Senior Management and Advisors         |  |  | 3   | 
|Item 2. Offer Statistics and Expected Timetable                       |  |  | 3   | 
|Item 3. Key Information                                               |  |  | 4   | 
|Selected Financial Data                                               |  |  | 4   | 
|Exchange Rates                                                        |  |  | 7   | 
|Exchange Controls                                                     |  |  | 8   | 
|Risk Factors                                                          |  |  | 9   | 
|Item 4. Information on the Company                                    |  |  | 19  | 
|History and Development                                               |  |  | 19  | 
|Business Overview                                                     |  |  | 20  | 
|Oil and Gas Exploration and Production                                |  |  | 24  | 
|Refining and Distribution                                             |  |  | 39  | 
|Petrochemicals                                                        |  |  | 44  | 
|Gas and Energy                                                        |  |  | 46  | 
|Insurance                                                             |  |  | 53  | 
|Patents and Trademarks                                                |  |  | 54  | 
|Quality, Safety, Environment and Health                               |  |  | 55  | 
|Regulation of our Business                                            |  |  | 58  | 
|Organizational Structure                                              |  |  | 82  | 
|Property, Plant and Equipment                                         |  |  | 83  | 
|Item 4A. Unresolved Staff Comments                                    |  |  | 83  | 
|Item 5. Operating and Financial Review and Prospects                  |  |  | 84  | 
|Analysis of Consolidated Results of Operations                        |  |  | 84  | 
|Overview                                                              |  |  | 84  | 
|Factors Affecting our Consolidated Results of Operations              |  |  | 85  | 
|Discussion of Results                                                 |  |  | 92  | 
|Year ended December 31, 2013 compared to year ended December 31, 2012 |  |  | 94  | 
|Analysis of Gross Profit by Business Segment                          |  |  | 95  | 
|Analysis of Share of Profit of Equity Accounted Investees             |  |  | 99  | 
|Year ended December 31, 2012 compared to year ended December 31, 2011 |  |  | 100 | 
|Analysis of Gross Profit by Business Segment                          |  |  | 101 | 
|Analysis of Share of Profit of Equity Accounted Investees             |  |  | 105 | 
|Critical Accounting Policies                                          |  |  | 106 | 
|Liquidity and Capital Resources                                       |  |  | 109 | 
|Description of Indebtedness                                           |  |  | 113 | 
|Future Capital Requirements                                           |  |  | 115 | 
|Off-Balance Sheet Transactions                                        |  |  | 116 | 
|Contractual Obligations                                               |  |  | 116 | 
|Item 6. Directors, Senior Management and Employees                    |  |  | 118 | 
|Directors and Senior Management                                       |  |  | 118 | 
|Compensation                                                          |  |  | 124 | 
|Board Practices                                                       |  |  | 125 | 
|Employees                                                             |  |  | 129 | 
|Share Ownership                                                       |  |  | 129 | 
|Item 7. Major Shareholders and Related Party Transactions             |  |  | 130 | 
|Major Shareholders                                                    |  |  | 130 | 
|Related Party Transactions                                            |  |  | 130 | 
|Item 8. Financial Information                                         |  |  | 134 | 
|Consolidated Financial Statements                                     |  |  | 134 | 
|Legal Proceedings                                                     |  |  | 134 | 
|Dividends                                                             |  |  | 134 | 
|Item 9. Offer and Listing                                             |  |  | 135 | 
|Markets                                                               |  |  | 136 | 
|Item 10. Additional Information                                       |  |  | 137 | 
|Memorandum and Articles of Association                                |  |  | 137 | 
|Material Contracts                                                    |  |  | 143 | 
|Exchange Controls                                                     |  |  | 144 | 
|Taxation                                                              |  |  | 144 | 
|Documents on Display                                                  |  |  | 149 | 



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|                                                                                      |  |  |     | 
|------------------------------------------------------------------------------------- |  |  | --- | 
|Item 11. Quantitative and Qualitative Disclosures about Market Risk                   |  |  | 150 | 
|Item 12. Description of Securities Other than Equity Securities                       |  |  | 150 | 
|Item 13. Defaults, Dividend Arrearages and Delinquencies                              |  |  | 152 | 
|Item 14. Material Modifications to the Rights of Security Holders and Use of
Proceeds |  |  | 152 | 
|Item 15. Controls and Procedures                                                      |  |  | 152 | 
|Item 16A. Audit Committee Financial Expert                                            |  |  | 153 | 
|Item 16B. Code of Ethics                                                              |  |  | 153 | 
|Item 16C. Principal Accountant Fees and Services                                      |  |  | 153 | 
|Item 16D. Exemption from the Listing Standards for Audit Committees                   |  |  | 154 | 
|Item 16E. Purchases of Equity Securities by the Issuer and Affiliated Purchasers      |  |  | 154 | 
|Item 16F. Change in Registrants Certifying Accountant                                |  |  | 154 | 
|Item 16G. Corporate Governance                                                        |  |  | 154 | 
|Item 16H. Mine Safety Disclosure                                                      |  |  | 159 | 
|Item 17. Financial Statements                                                         |  |  | 160 | 
|Item 18. Financial Statements                                                         |  |  | 160 | 
|Item 19. Exhibits                                                                     |  |  | 160 | 



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NOTE ON MERGER

This annual report on Form 20-F (this Annual Report) has been filed by Petrobras Argentina S.A.
(PESA) (formerly Petrobras Energía S.A.). On January 30, 2009, separate shareholders meetings of Petrobras Energía Participaciones S.A. (PEPSA) and PESA approved their merger, pursuant to which PEPSA
was merged and absorbed into PESA, the surviving company.

Shareholders of PEPSA have received shares of PESA
(in the United States, in the form of American Depositary Shares, or ADSs), and the ADSs of PEPSA have been removed from listing on the New York Stock Exchange (the NYSE) and from registration with the U.S. Securities and
Exchange Commission (the SEC). Following this exchange of shares, ADSs, each representing 10 Class B shares of PESA, were listed and began trading on the NYSE. PESA is the successor issuer to PEPSA, as contemplated by Rule 12g-3 of the
Securities Exchange Act of 1934, as amended (the Exchange Act).

All references in this Annual
Report to:

Petrobras Argentina, Petrobras Energía, PESA, the
Company, we, us, our, and similar terms, refer to Petrobras Argentina S.A. and its subsidiaries, but exclude associates and joint ventures. Prior to July 2003, PESAs corporate name was Pecom
Energía S.A. On March 27, 2009, the shareholders of PESA approved the change of the companys corporate name from Petrobras Energía S.A. to Petrobras Argentina, S.A. See Item 4. Information on the CompanyHistory
and Development.

Petrobras Energía Participaciones and PEPSA refer to
Petrobras Energía Participaciones S.A. Prior to July 2003, the corporate name of PEPSA was Pérez Companc S.A.

Petrobras refers to Petróleo Brasileiro S.A  PETROBRAS.

Argentine pesos, pesos or Ps. refer to the currency of the Republic of Argentina.

U.S. dollars or U.S.$ refer to the currency of the United States of America.

Argentina refers to the Republic of Argentina, and Argentine government refers to the federal
government of Argentina.

FORWARD LOOKING STATEMENTS

Some of the information included in this Annual Report contains information that is forward-looking, including statements
regarding capital expenditures, competition and sales, oil and gas reserves and prospects, and trends in the oil and gas, refining, distribution, petrochemicals and electricity industries.

Certain statements contained in this Annual Report are forward-looking statements and are not based on historical facts,
such as statements containing the words believe, may, will, estimate, continue, anticipate, intend, expect and similar words. These forward-looking
statements are subject to risks, uncertainties and assumptions, including those discussed in Item 3. Key InformationRisk Factors and elsewhere in this Annual Report. Factors that could cause actual results to differ materially and
adversely include, but are not limited to:



| |  |  | Changes in general economic, business, political or other conditions in Argentina or changes in general economic or business conditions in other
Latin American countries;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The availability of financing at reasonable terms to Argentine companies, such as us;
| | - |  | -------------------------------------------------------------------------------------



| |  |  | The failure of governmental authorities to approve proposed measures or transactions described in this Annual Report;
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | Changes in the price of hydrocarbons and oil products;
| | - |  | ------------------------------------------------------



| |  |  | Changes to our capital expenditure plans;
| | - |  | -----------------------------------------



| |  |  | Changes in laws or regulations affecting our operations;
| | - |  | --------------------------------------------------------



| |  |  | Increased costs; and
| | - |  | --------------------



| |  |  | Other factors discussed under Risk Factors in Item 3 of this Annual Report.
| | - |  | -----------------------------------------------------------------------------



1



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Forward-looking statements speak only as of the date they were made. We
undertake no obligation to update any forward-looking statement or statements to reflect events or circumstances after the date on which the statement is made or to reflect the occurrence of unanticipated events. New factors emerge from time to
time, and it is not possible for us to predict all of these factors. In light of these limitations, you should not place undue reliance on forward-looking statements contained in this Annual Report.



2



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PART I

Item 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISORS

Not applicable.

Item 2. OFFER STATISTICS AND EXPECTED TIMETABLE

Not applicable.



3



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Item 3. KEY INFORMATION

SELECTED FINANCIAL DATA

The financial information set forth below may not contain all of the financial information that you should consider when
making an investment decision. This information should be read in conjunction with, and is qualified in its entirety by reference to, the Risk Factors included in this Annual Report. See Item 3. Key InformationRisk
Factors. You should also carefully read our audited consolidated financial statements and Item 5. Operating and Financial Review and Prospects included in this Annual Report for additional financial information about us.

Our audited consolidated financial statements included in this Annual Report (Audited Consolidated
Financial Statements) are prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (the IASB).

Presentation of Financial Information in accordance with IFRS

Since January 1, 2012, in compliance with adopted accounting standards applicable to public companies in Argentina
and regulations introduced by the Comisión Nacional de Valores (the Argentine Securities Commission, or CNV), PESA has been required to prepare its statutory financial statements in accordance with IFRS as issued by the
IASB.

Consistent with Item 18 of Form 20-F, we continue to provide the disclosure required under
Accounting Standards Codification (ASC) 932 of the Financial Accounting Standards Board (the FASB) relating to extractive activitiesOil and Gas (formerly FASB Statement of Financial Accounting Standards
No. 69Disclosures about Oil and Gas Producing Activities) (ASC Topic 932), as this is required regardless of the basis of accounting on which we prepare our financial statements.

Consideration of the effects of inflation

According to inflation data published by the Instituto Nacional de Estadística y Censos (the Argentine national statistics and census institute, or the INDEC), for the years from
2009 to 2013, the Argentine consumer price index increased 7.7%, 10.9%, 9.5%, 10.8% and 10.9%, respectively; and the wholesale price index increased 10.3%, 14.6%, 12.7%, 13.1% and 14.7%, respectively. However the INDEC has since 2007 experienced a
process of institutional and methodological reforms that have given rise to controversy with respect to the reliability of the information that it produces. Reports published by the International Monetary Fund (the IMF) state that their
staff also uses alternative measures of inflation for Argentine macroeconomic surveillance, including data produced by private sources, which have shown inflation rates considerably higher than those published by the INDEC since 2007. The IMF has
also issued a declaration of censure against Argentina in connection with its breach of its related obligations to the IMF under the Articles of Agreement for failing to make sufficient progress in adopting remedial measures to address the quality
of official data, including inflation and GDP data. On February 13, 2014, the INDEC released a new inflation index that measures prices on goods across the country and replaces the previous index that only calculated inflation in the urban
sprawl of the City of Buenos Aires. Under the new methodology, the January, February and March 2014 consumer price index rose 3.7%, 3.4% and 2.6%, respectively. The IMF has reacted cautiously to the new index, declaring that it will review
Argentinas reports on progress in revising its inflation and gross domestic product statistics later in 2014. See Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaEconomic and political instability in
Argentina has affected and may continue to adversely affect our financial condition and results of operations.

In accordance with IFRS, the financial information set forth in this Annual Report has not been adjusted to reflect inflation since the date of IFRS transition, January 1, 2009. Inflation could
therefore affect the comparability among the different periods presented herein.

The following tables set
forth selected consolidated financial data of the Company presented in Argentine pesos and prepared in accordance with IFRS as issued by the IASB, as of and for each of the years ended December 31, 2013, 2012, 2011, 2010 and 2009, derived from
our audited consolidated financial statements (except as set forth below), which were audited by Price Waterhouse & Co. S.R.L., an independent registered public accounting firm in Buenos Aires, Argentina, member firm of
PricewaterhouseCoopers International Limited network, (PwC), as of and for each of the years ended December 31, 2013 and 2012, and by KPMG as of and for each of the years ended December 31, 2011, 2010 and 2009.

The financial data relating to the fiscal years ended December 31, 2013, 2012 and 2011 set forth below have been
derived from our Audited Consolidated Financial Statements included in this Annual Report. Our audited consolidated financial statements as of and for the years ended December 31, 2012 and December 31, 2011 have been modified to reflect
changes of new standards and interpretations issued by the IASB effective as of December 31, 2013 that have been adopted by the Company. See Note 2.2.1 to our Audited Consolidated Financial Statements. Selected financial data for the fiscal
years ended December 31, 2010 and 2009 set forth below do not reflect changes in IFRS effective as of December 31, 2013 as the effects are not material.



4



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Petrobras Argentina S.A.Consolidated Statement of Income and Comprehensive Income
Data



|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|-------------------------------------------------------------------- |  | --------------------------------------------------------------------------------------------------- | ------- | - | ---- |  | ------ | ---- |  |  | ------ | - |  | ---- | ------ | - |  |  | ------ | -
|                                                                     |  | Year Ended December 31,                                                                             |        
|                                                                     |  | 2013                                                                                                |         |   | 2012 |  |        | 2011 |  |  | 2010   |   |  | 2009 |       
|                                                                     |  | (in millions of pesos, except for per share amounts and number of
shares or as otherwise indicated) |        
|IFRS Summary Financial Data:                                         |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Sales                                                                |  |                                                                                                     | 15,340  |   |      |  | 12,765 |      |  |  | 11,104 |   |  |      | 10,310 |   |  |  | 7,899  |  
|Cost of sales                                                        |  |                                                                                                     | (11,260 | ) |      |  | (9,619 | )    |  |  | (8,462 | ) |  |      | (7,474 | ) |  |  | (5,555 | )
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Gross profit                                                         |  |                                                                                                     | 4,080   |   |      |  | 3,146  |      |  |  | 2,642  |   |  |      | 2,836  |   |  |  | 2,344  |  
|Administrative and selling expenses                                  |  |                                                                                                     | (1,797  | ) |      |  | (1,430 | )    |  |  | (1,222 | ) |  |      | (1,329 | ) |  |  | (1,308 | )
|Exploration expenses                                                 |  |                                                                                                     | (82     | ) |      |  | (212   | )    |  |  | (391   | ) |  |      | (190   | ) |  |  | (333   | )
|Other operating expenses, net                                        |  |                                                                                                     | (571    | ) |      |  | (121   | )    |  |  | (831   | ) |  |      | (454   | ) |  |  | (382   | )
|Share of profit of equity accounted investees                        |  |                                                                                                     | (279    | ) |      |  | (148   | )    |  |  | (36    | ) |  |      | (97    | ) |  |  | (95    | )
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Operating income                                                     |  |                                                                                                     | 1,351   |   |      |  | 1,235  |      |  |  | 162    |   |  |      | 766    |   |  |  | 226    |  
|Financial income                                                     |  |                                                                                                     | 700     |   |      |  | 442    |      |  |  | 289    |   |  |      | 291    |   |  |  | 441    |  
|Financial costs                                                      |  |                                                                                                     | (647    | ) |      |  | (512   | )    |  |  | (465   | ) |  |      | (547   | ) |  |  | (828   | )
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Income (loss) before income tax                                      |  |                                                                                                     | 1,404   |   |      |  | 1,165  |      |  |  | (14    | ) |  |      | 510    |   |  |  | (161   | )
|Income tax                                                           |  |                                                                                                     | (552    | ) |      |  | (492   | )    |  |  | (15    | ) |  |      | (154   | ) |  |  | 169    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Income (loss) from continuing operations                             |  |                                                                                                     | 852     |   |      |  | 673    |      |  |  | (29    | ) |  |      | 356    |   |  |  | 8      |  
|Income from discontinued operations                                  |  |                                                                                                     |        |   |      |  |       |      |  |  | 706    |   |  |      | 275    |   |  |  | 868    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Net income                                                           |  |                                                                                                     | 852     |   |      |  | 673    |      |  |  | 677    |   |  |      | 631    |   |  |  | 876    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Actuarial profits and losses                                         |  |                                                                                                     | 10      |   |      |  | (7     | )    |  |  | 15     |   |  |      |       |   |  |  |       |  
|Foreign currency translation                                         |  |                                                                                                     | 278     |   |      |  | 45     |      |  |  | (133   | ) |  |      | 29     |   |  |  | 34     |  
|Other comprehensive income related to our equity accounted investees |  |                                                                                                     |        |   |      |  | 7      |      |  |  | 12     |   |  |      | 6      |   |  |  | 11     |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Total other comprehensive income                                     |  |                                                                                                     | 1,140   |   |      |  | 718    |      |  |  | 571    |   |  |      | 666    |   |  |  | 921    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Earnings (losses) per share basic/diluted (in pesos):                |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|From continuing operations                                           |  |                                                                                                     | 0.386   |   |      |  | 0.306  |      |  |  | (0.012 | ) |  |      | 0.173  |   |  |  | 0.003  |  
|From discontinued operations                                         |  |                                                                                                     |        |   |      |  |       |      |  |  | 0.350  |   |  |      | 0.136  |   |  |  | 0.430  |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Total                                                                |  |                                                                                                     | 0.386   |   |      |  | 0.306  |      |  |  | 0.337  |   |  |      | 0.309  |   |  |  | 0.433  |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Net income attributable to:                                          |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Shareholders of the Company                                          |  |                                                                                                     | 779     |   |      |  | 618    |      |  |  | 681    |   |  |      | 625    |   |  |  | 875    |  
|Non-controlling interest                                             |  |                                                                                                     | 73      |   |      |  | 55     |      |  |  | (4     | ) |  |      | 6      |   |  |  | 1      |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Total                                                                |  |                                                                                                     | 852     |   |      |  | 673    |      |  |  | 677    |   |  |      | 631    |   |  |  | 876    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Total comprehensive income for the year:                             |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|From continuing operations                                           |  |                                                                                                     | 1,140   |   |      |  | 718    |      |  |  | (1     | ) |  |      | 362    |   |  |  | 19     |  
|From discontinued operations                                         |  |                                                                                                     |        |   |      |  |       |      |  |  | 572    |   |  |      | 304    |   |  |  | 902    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Total                                                                |  |                                                                                                     | 1,140   |   |      |  | 718    |      |  |  | 571    |   |  |      | 666    |   |  |  | 921    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Total comprehensive income attributable to:                          |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Shareholders of the Company                                          |  |                                                                                                     | 896     |   |      |  | 624    |      |  |  | 575    |   |  |      | 660    |   |  |  | 920    |  
|Non-controlling interest                                             |  |                                                                                                     | 244     |   |      |  | 94     |      |  |  | (4     | ) |  |      | 6      |   |  |  | 1      |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  
|Total                                                                |  |                                                                                                     | 1,140   |   |      |  | 718    |      |  |  | 571    |   |  |      | 666    |   |  |  | 921    |  
|                                                                     |  |                                                                                                     |         |   |      |  |        |      |  |  |        |   |  |      |        |   |  |  |        |  



5



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##### Table of Contents

Petrobras Argentina S.A.Consolidated Statement of Financial Position Data



|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|-------------------------------------------- |  | --------------------------------------------------------------------------------------------------- | ------ | - | ---- |  | ------ | ---- |  |  | ------ |  |  | ---- | ------ |  |  |  | ------ | 
|                                             |  | Year Ended December 31,                                                                             |       
|                                             |  | 2013                                                                                                |        |   | 2012 |  |        | 2011 |  |  | 2010   |  |  | 2009 |       
|                                             |  | (in millions of pesos, except for per share amounts and number of
shares or as otherwise indicated) |       
|IFRS Summary Financial Data:                 |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Statements of Financial Position             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Assets                                       |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Current assets                               |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Cash and cash equivalents                    |  |                                                                                                     | 1,193  |   |      |  | 1,260  |      |  |  | 1,192  |  |  |      | 2,113  |  |  |  | 933    | 
|Other investments                            |  |                                                                                                     | 23     |   |      |  | 20     |      |  |  | 21     |  |  |      | 42     |  |  |  | 13     | 
|Trade receivables                            |  |                                                                                                     | 2,519  |   |      |  | 2,168  |      |  |  | 1,871  |  |  |      | 1,468  |  |  |  | 1,409  | 
|Other receivables                            |  |                                                                                                     | 1,551  |   |      |  | 1,553  |      |  |  | 1,070  |  |  |      | 1,761  |  |  |  | 2,441  | 
|Inventories                                  |  |                                                                                                     | 1,310  |   |      |  | 1,023  |      |  |  | 970    |  |  |      | 1,052  |  |  |  | 974    | 
|Assets classified as held for sale           |  |                                                                                                     |       |   |      |  |       |      |  |  |       |  |  |      | 142    |  |  |  | 222    | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total current assets                         |  |                                                                                                     | 6,596  |   |      |  | 6,024  |      |  |  | 5,124  |  |  |      | 6,578  |  |  |  | 5,992  | 
|Non-current assets                           |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Trade receivables                            |  |                                                                                                     | 73     |   |      |  | 86     |      |  |  | 211    |  |  |      | 223    |  |  |  | 167    | 
|Other receivables                            |  |                                                                                                     | 245    |   |      |  | 238    |      |  |  | 896    |  |  |      | 283    |  |  |  | 628    | 
|Inventories                                  |  |                                                                                                     | 58     |   |      |  | 45     |      |  |  | 39     |  |  |      | 35     |  |  |  | 35     | 
|Other investments                            |  |                                                                                                     | 301    |   |      |  | 279    |      |  |  | 348    |  |  |      | 271    |  |  |  | 275    | 
|Investments in associates                    |  |                                                                                                     | 3,568  |   |      |  | 3,006  |      |  |  | 2,943  |  |  |      | 2,969  |  |  |  | 3,321  | 
|Investments in companies under joint control |  |                                                                                                     | 497    |   |      |  | 689    |      |  |  | 724    |  |  |      | 691    |  |  |  | 727    | 
|Property, plant and equipment                |  |                                                                                                     | 9,524  |   |      |  | 8,480  |      |  |  | 7,056  |  |  |      | 7,295  |  |  |  | 7,603  | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total non-current assets                     |  |                                                                                                     | 14,266 |   |      |  | 12,823 |      |  |  | 12,217 |  |  |      | 11,767 |  |  |  | 12,756 | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total assets                                 |  |                                                                                                     | 20,862 |   |      |  | 18,847 |      |  |  | 17,341 |  |  |      | 18,345 |  |  |  | 18,748 | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Liabilities                                  |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Current liabilities                          |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Accounts payable                             |  |                                                                                                     | 2,553  |   |      |  | 1,863  |      |  |  | 1,572  |  |  |      | 1,568  |  |  |  | 1,323  | 
|Short-term loans                             |  |                                                                                                     | 208    |   |      |  | 1,108  |      |  |  | 40     |  |  |      | 584    |  |  |  | 1,862  | 
|Payroll and social security taxes            |  |                                                                                                     | 304    |   |      |  | 258    |      |  |  | 194    |  |  |      | 184    |  |  |  | 183    | 
|Taxes payable                                |  |                                                                                                     | 578    |   |      |  | 470    |      |  |  | 310    |  |  |      | 442    |  |  |  | 312    | 
|Provisions                                   |  |                                                                                                     | 385    |   |      |  | 643    |      |  |  | 516    |  |  |      | 505    |  |  |  | 309    | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total current liabilities                    |  |                                                                                                     | 4,028  |   |      |  | 4,342  |      |  |  | 2,632  |  |  |      | 3,283  |  |  |  | 3,989  | 
|Non-current liabilities                      |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Accounts payable                             |  |                                                                                                     | 7      |   |      |  | 172    |      |  |  | 184    |  |  |      | 166    |  |  |  | 154    | 
|Long-term loans                              |  |                                                                                                     | 2,024  |   |      |  | 1,558  |      |  |  | 2,182  |  |  |      | 3,403  |  |  |  | 3,687  | 
|Employment benefit obligations               |  |                                                                                                     | 336    |   |      |  | 269    |      |  |  | 195    |  |  |      | 157    |  |  |  | 142    | 
|Deferred income tax liabilities              |  |                                                                                                     | 548    |   |      |  | 354    |      |  |  | 247    |  |  |      | 398    |  |  |  | 664    | 
|Provisions                                   |  |                                                                                                     | 2,224  |   |      |  | 1,581  |      |  |  | 1,553  |  |  |      | 985    |  |  |  | 571    | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total non-current liabilities                |  |                                                                                                     | 5,139  |   |      |  | 3,934  |      |  |  | 4,361  |  |  |      | 5,109  |  |  |  | 5,218  | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total liabilities                            |  |                                                                                                     | 9,167  |   |      |  | 8,276  |      |  |  | 6,993  |  |  |      | 8,392  |  |  |  | 9,207  | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Equity                                       |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Capital Stock                                |  |                                                                                                     | 2,019  |   |      |  | 2,019  |      |  |  | 1,010  |  |  |      | 1,010  |  |  |  | 1,010  | 
|Other items in Capital                       |  |                                                                                                     | 2,186  |   |      |  | 2,186  |      |  |  | 2,186  |  |  |      | 2,186  |  |  |  | 2,165  | 
|Reserves income                              |  |                                                                                                     | 6,508  |   |      |  | 5,953  |      |  |  | 448    |  |  |      | 448    |  |  |  | 559    | 
|Other                                        |  |                                                                                                     | (693   | ) |      |  | (693   | )    |  |  |       |  |  |      |       |  |  |  |       | 
|Unappropriated retained earnings             |  |                                                                                                     | 752    |   |      |  | 528    |      |  |  | 6,635  |  |  |      | 6,150  |  |  |  | 5,689  | 
|Other comprehensive income                   |  |                                                                                                     | 189    |   |      |  | 72     |      |  |  | 66     |  |  |      | 152    |  |  |  | 117    | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total equity attributable to:                |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Shareholders of the Company                  |  |                                                                                                     | 10,961 |   |      |  | 10,065 |      |  |  | 10,345 |  |  |      | 9,946  |  |  |  | 9,540  | 
|Non-controlling interest                     |  |                                                                                                     | 734    |   |      |  | 506    |      |  |  | 3      |  |  |      | 7      |  |  |  | 1      | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Total equity                                 |  |                                                                                                     | 11,695 |   |      |  | 10,571 |      |  |  | 10,348 |  |  |      | 9,953  |  |  |  | 9,541  | 
|                                             |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Number of shares outstanding (in millions)   |  |                                                                                                     |        |   |      |  |        |      |  |  |        |  |  |      |        |  |  |  |        | 
|Class B                                      |  |                                                                                                     | 2,019  |   |      |  | 2,019  |      |  |  | 1,010  |  |  |      | 1,010  |  |  |  | 1,010  | 



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##### Table of Contents

EXCHANGE RATES

From April 1, 1991 until the end of 2001, Law No. 23,928 and Decree No. 529/91 (together, the
Convertibility Law) established a fixed exchange rate under which the Banco Central de la República Argentina(the central bank of Argentina, or the Central Bank) was obliged to sell U.S. dollars at a fixed rate
of one peso per U.S. dollar. On January 6, 2002, the Argentine Congress enacted the Public Emergency and Foreign Exchange System Reform Law No. 25,562 (the Public Emergency Law), which suspended certain provisions of the
Convertibility Law, including the fixed exchange rate of Ps. 1.00 to U.S.$1.00, and granted the Argentine government the power to set the exchange rate between the peso and foreign currencies and to issue regulations related to the foreign exchange
market. Following a brief period during which the Argentine government established a temporary dual exchange rate system, pursuant to the Public Emergency Law, the peso has been allowed to float freely against other currencies since February
2002.

The following table sets forth the annual high, low, average and period-end exchange rates for
the periods indicated, expressed in Argentine pesos per U.S. dollar and not adjusted for inflation. In January 2014, the peso lost approximately 24% of its value with respect to the U.S. Dollar. There can be no assurance that the Argentine peso will
not depreciate or appreciate again in the future. The Federal Reserve Bank of New York does not report a buying rate for pesos.



|                        |  |                                |      |  |     |  |      |             |  |  |            |  |  |  |      | 
|----------------------- |  | ------------------------------ | ---- |  | --- |  | ---- | ----------- |  |  | ---------- |  |  |  | ---- | 
|                        |  | Argentine peso per U.S. dollar |     
|                        |  | High                           |      |  | Low |  |      | Average (1) |  |  | Period-end | 
|Year ended December 31, |  |                                |      |  |     |  |      |             |  |  |            |  |  |  |      | 
|                        |  |                                |      | 
|2013                    |  |                                | 6.49 |  |     |  | 4.92 |             |  |  | 5.47       |  |  |  | 6.49 | 
|2012                    |  |                                | 4.91 |  |     |  | 4.30 |             |  |  | 4.55       |  |  |  | 4.91 | 
|2011                    |  |                                | 4.30 |  |     |  | 3.97 |             |  |  | 4.13       |  |  |  | 4.30 | 
|2010                    |  |                                | 3.99 |  |     |  | 3.79 |             |  |  | 3.91       |  |  |  | 3.98 | 
|2009                    |  |                                | 3.85 |  |     |  | 3.45 |             |  |  | 3.73       |  |  |  | 3.80 | 
|                        |  |                                |      | 
|Month:                  |  |                                |      |  |     |  |      |             |  |  |            |  |  |  |      | 
|                        |  |                                |      | 
|April 2014(2)           |  |                                | 8.00 |  |     |  | 8.00 |             |  |  | 8.00       |  |  |  | 8.00 | 
|March 2014              |  |                                | 8.01 |  |     |  | 7.86 |             |  |  | 7.93       |  |  |  | 8.00 | 
|February 2014           |  |                                | 8.01 |  |     |  | 7.76 |             |  |  | 7.85       |  |  |  | 7.88 | 
|January 2014            |  |                                | 8.02 |  |     |  | 6.52 |             |  |  | 7.05       |  |  |  | 8.02 | 



|(1) | The figures
provided represent the average of the exchange rates at the close of trading on each business day during the relevant period.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------

|(2) | Through
April 15, 2014.
|--- | -----------------------



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##### Table of Contents

EXCHANGE CONTROLS

Prior to December 1989, the Argentine foreign exchange market was subject to exchange controls. From December 1989 until
April 1991, Argentina had a freely floating exchange rate for all foreign currency transactions, and the transfer of dividend payments in foreign currency abroad and the repatriation of capital were permitted without prior approval of the Central
Bank. From April 1, 1991, when the Convertibility Law became effective, until December 21, 2001, when the Central Bank decided to close the foreign exchange market, the Argentine currency was freely convertible into U.S. dollars.

On December 3, 2001, the Argentine government imposed a number of monetary and currency exchange control
measures through Decree No. 1,570/01, which included restrictions on the free disposition of funds deposited with banks and tight restrictions on transferring funds abroad without the Central Banks prior authorization subject to specific
exceptions for transfers related to foreign trade. Between 2002 and the first half of 2011, the Central Bank gradually eased these restrictions.

In June 2003 the Argentine government set restrictions on capital flows into Argentina, which mainly consisted of a prohibition against the transfer abroad of any funds until 180 days after their entry
into the country. Furthermore, in June 2005, through Decree No. 616/05, the Argentine government established further restrictions on capital flows into Argentina, including increasing the period that certain incoming funds must remain in
Argentina to 365 calendar days and requiring that 30% of such incoming funds be deposited with a bank in Argentina in a non-transferable, non-interest-bearing account for 365 calendar days. Export and import financing operations, as well as primary
public offerings of corporate bonds listed on self-regulated markets, among others, are exempt from the foregoing provision.

On October 25, 2011, the Argentine government issued Decree No. 1,722/11, providing that all foreign currency revenues obtained from exports made by mining and oil and gas companies must be
repatriated and sold within the local foreign exchange market, which is the general regime applicable to revenues generated by Argentine exports. Prior to the issuance of this decree, companies engaged in exploration and development of hydrocarbons
benefited from a special regime that allowed them to retain overseas up to 70% of the proceeds of certain exports.

Since October 2011, the Argentine government has expanded the restrictions on access to the foreign exchange market and transfers of foreign currency abroad. Through a combination of foreign exchange and
tax regulations, the Argentine authorities have significantly curtailed access to foreign exchange by individuals and private sector entities. Current foreign exchange regulations include, among others, the obligation to obtain prior approval by the
Central Bank of certain foreign exchange transactions such as payments relating to royalties, services or fees payable to related parties of Argentine companies outside Argentina (pursuant to section 3.4 of Central Bank Communication A
5377, issued December 14, 2012), the suspension as from July 2012 of section 4.2 of Central Bank Communication A 5236, issued October 27, 2011, which previously permitted purchases of foreign exchange in an amount of up to
U.S.$2 million per month to create or increase portfolio investments outside of Argentina, and limits to net position in foreign exchange holdings of financial institutions (pursuant to Central Bank Communication A 5536, issued on
February 4, 2014). See Risk FactorsFactors Relating to ArgentinaEconomic and political instability in Argentina has affected and may continue to adversely affect our financial condition and results of operations.



8



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##### Table of Contents

RISK FACTORS

Factors Relating to Argentina

Economic and political instability in Argentina has affected and may continue to adversely affect our financial condition and results of operations.

We are exposed to economic and political conditions in Argentina, considering that as of December 31, 2013,
approximately 77% of our total assets, 99% of our sales, 90% of our combined crude oil and gas production and 86% of our proved oil and gas reserves were located in Argentina.

The Argentine economy has experienced significant volatility in recent decades, characterized by periods of low or
negative growth, high and variable levels of inflation and currency devaluation. As a consequence, our business and operations have been, and could in the future be, affected from time to time to varying degrees by economic and political
developments and other material events affecting the Argentine economy, such as: inflation; price controls; fluctuations in foreign currency exchange rates and interest rates; currency devaluation; governmental policies regarding spending and
investment, and other initiatives increasing government involvement with economic activity; civil unrest; and local insecurity concerns.

During 2001 and 2002, Argentina went through a period of severe political, economic and social crisis. Among other consequences, the crisis resulted in Argentina defaulting on its foreign debt
obligations, introducing emergency measures and numerous changes in economic policies that affected utilities and many other sectors of the economy, and suffering a significant real devaluation of the peso, which in turn caused numerous Argentine
private sector debtors with foreign currency exposure to default on their outstanding debt. Following that crisis, Argentina has substantially increased its real Gross Domestic Product (GDP). During 2008 and 2009, however, the Argentine
economy suffered a slowdown attributed to local and external factors, including an extended drought affecting agricultural activities, and the effects of the global economic crisis. Real GDP growth recovered in 2010 and 2011, with GDP increasing
8.9% in 2011, according to data published by the INDEC, which is the only institution in Argentina with the statutory power to produce official nationwide statistics. In 2012, however, GDP growth slowed to 1.9% according to data published by the
INDEC, before recovering to approximately 3% in 2013.

Argentina has confronted inflationary pressures since
2007, evidenced by significantly higher fuel, energy and food prices, among other indicators. According to inflation data published by the INDEC, from 2009 to 2013, the Argentine consumer price index increased 7.7%, 10.9%, 9.5%, 10.8% and 10.9%,
respectively; and the wholesale price index increased 10.3%, 14.6%, 12.7%, 13.1% and 14.7%, respectively. However, the INDEC has since 2007 experienced a process of institutional and methodological reforms that have given rise to controversy with
respect to the reliability of the information that it produces. Reports published by the IMF state that their staff uses alternative measures of inflation for macroeconomic surveillance, including data produced by private sources, which have shown
inflation rates considerably higher than those published by the INDEC since 2007. The IMF has also issued a declaration of censure against Argentina in connection with its breach of its related obligations to the IMF under the Articles of Agreement
for failing to make sufficient progress in adopting remedial measures to address the quality of official data, including inflation and GDP data.

On February 13, 2014, the INDEC released a new inflation index that measures prices on goods across the country and replaces the previous index that only measured inflation in the urban sprawl of the
City of Buenos Aires. Under the new methodology, the January, February and March 2014 consumer price index rose 3.7%, 3.4% and 2.6%, respectively. The IMF has reacted cautiously to the new index, declaring that it will review Argentinas
reports on progress in revising its inflation and gross domestic product statistics later in 2014.

While
controversy remains as to the reliability of the official data, since 2007 inflation in Argentina has contributed to a material increase in our costs of operation, in particular labor costs, and negatively impacted our results of operations and
financial condition.

There can be no assurance that inflation rates will not escalate in the future, or of
what effects the measures adopted or that may be adopted in the future by the Argentine government to control inflation may have. See Government intervention in the Argentine economy could adversely affect our results of operations or
financial condition.

We cannot provide any assurance that inflation, and/or other future economic,
social and political developments in Argentina, over which we have no control, will not adversely affect our financial condition or results of operations, including our ability to pay our debts at maturity or dividends.



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##### Table of Contents

Fluctuations in the value of the peso could adversely affect the Argentine economy,
our results of operations or financial condition.

Fluctuations in the value of the peso may also
adversely affect the Argentine economy, our financial condition and results of operations. Since January 2002, the peso has fluctuated significantly in value. If the peso devalues significantly, all of the negative effects on the Argentine economy
related to such devaluation could also have adverse consequences for our business. A substantial increase in the value of the peso against the U.S. dollar also presents risks for the Argentine economy since it may lead to a deterioration of the
countrys current account balance and the balance of payments. In January 2014, the peso lost approximately 24% of its value with respect to the U.S. Dollar. We are unable to predict the future value of the peso against the U.S. dollar and how
any fluctuations may affect the demand for our products and services or the costs that we incur in conducting our operations. See Item 3. Key InformationExchange Rates. In addition, the Argentine government has also adopted
numerous measures to control directly or indirectly foreign trade and foreign exchange markets. Since 2011, the Argentine government has adopted increasingly stringent exchange controls such as requiring an authorization of tax authorities to access
the foreign currency exchange market. Exchange control regulations may prevent or limit us from offsetting the risk derived from our exposure to the U.S. dollar and, if so, we cannot predict the impact of these changes on our financial condition and
results of operations.

Government intervention in the Argentine economy could adversely affect our results of
operations or financial condition.

In addition to the political and economic factors described above,
our business and operations have been, and could in the future be, affected by actions taken by the Argentine government through the implementation of new or changed laws and regulations, such as: nationalizations, expropriations or forced
divestiture of assets; restrictions on production, imports and exports; exchange and/or transfer restrictions; direct and indirect price controls; tax increases, changes in the interpretation or application of tax laws and other retroactive tax
claims or challenges; cancellation of contract rights; and delays or denials of governmental approvals.

During recent years, the Argentine government has increased its direct intervention in the economy, including through the
implementation of expropriation and nationalization measures, price controls and exchange controls.

In 2008,
the Argentine government absorbed and replaced the former private pension system for a public pay as you go pension system As a result, all resources administered by the private pension funds, including significant equity interests in a
wide range of listed companies, were transferred to a separate fund (Fondo de Garantía de Sustentabilidad, or the FGS) to be administered by the National Social Security Administration (Administración Nacional de
la Seguridad Social, or the ANSES). The dissolution of the private pension funds and the transfer of their financial assets to the FGS have had important repercussions on the financing of private sector companies. Debt and equity
instruments which previously could be placed with pension fund administrators are now entirely subject to the discretion of the ANSES. Since acquiring equity interests in privately owned companies through the process of replacing the pension system,
the ANSES has been entitled to designate government representatives to the boards of directors of those entities. Pursuant to Decree No. 1,278/12, issued by the Executive Branch on July 25, 2012, the ANSES representatives must report
directly to the Ministry of Economy and are subject to a mandatory information-sharing regime, under which, among other obligations, they must immediately inform the Ministry of Economy of the agenda for each board of directors meeting and provide
related documentation.

In April 2012, the Argentine government decreed the removal of directors and senior
officers of YPF S.A. (YPF), the countrys largest oil and gas company, which was controlled by the Spanish group Repsol, and submitted a bill to the Argentine Congress to expropriate shares held by Repsol representing 51% of the
shares of YPF. The Argentine Congress approved the bill in May 2012 through the passage of Law No. 26,741, which declared hydrocarbons self-sufficiency, production, industrialization, transportation and marketing to be activities of public
interest and fundamental policies of Argentina, and empowered the Argentine government to adopt any measures necessary to achieve the objectives set forth in that law. In February 2014, the Argentine government and Repsol announced that they had
reach agreement on the terms of the compensation payable to Repsol for the expropriation of the YPF shares. Such compensation totals US$ 5 billion, payable by delivery Argentine sovereign bonds with various maturities. See Factors
Relating to Our BusinessThe Argentine government and provincial governments have intervened in the oil and gas industry in the past, and are likely to continue to intervene.

Our business and operations in Argentina may also be adversely affected by measures adopted by the Argentine government
to address inflation. For example, increases in the costs of services and labor could negatively affect our results of operations if we are not permitted to pass those costs along to customers in the tariffs which we charge due to the imposition of
price controls. See Factors Relating to Our BusinessLimitations on local pricing in Argentina may adversely affect our results of operations.

In addition, on October 26, 2011 the Argentine government issued Decree No. 1,722/11, providing that all
foreign currency revenues obtained from exports made by mining and oil and gas companies must be repatriated and sold within the local foreign exchange market, which is the general regime applicable to revenues generated by Argentine exports. Prior
to the issuance of this decree, we were allowed to retain overseas up to 70% of the proceeds of certain exports. See Item 3. Key InformationExchange Controls and Item 5. Operating and Financial Review and
ProspectsDescription of Indebtedness.

It is widely reported by private economists that
expropriations, price controls, exchange controls and other direct involvement by the Argentine government in the economy have had an adverse impact on the level of investment in Argentina, the access of Argentine companies to the international
capital markets and Argentinas commercial and diplomatic relations with other countries. The level of government intervention in the economy may continue or increase, which may adversely affect Argentinas economy and, in turn, our
business, results of operations and financial condition.



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The Argentine economy can be adversely affected by economic developments in other
markets and by more general contagion effects, which could have a material adverse effect on Argentinas economic growth.

Argentinas economy is vulnerable to external shocks that could be caused by adverse developments affecting its principal trading partners. A significant decline in the economic growth of any of
Argentinas major trading partners could have a material adverse impact on Argentinas balance of trade and adversely affect Argentinas economic growth. For example, recent economic slowdowns, especially in Argentinas major
trading partners, led to declines in Argentine exports in 2012. Declining demand for Argentine exports, or a decline in the international market prices for those products, could have a material adverse effect on Argentinas economic growth.

In addition, financial and securities markets in Argentina are influenced by economic and market conditions
in other markets worldwide. For example, the recent challenges faced in 2011 and 2012 by the European Union to stabilize certain of its member economies had international implications affecting the stability of global financial markets, which
hindered economies worldwide and negatively affected the Argentine economy, and in turn, our business and results of operations.

Although economic conditions vary from country to country, investors perceptions of events occurring in other countries have in the past substantially affected, and may continue to substantially
affect, capital flows into and investments in securities from issuers in other countries, including Argentina. International investors reactions to events occurring in one market sometimes demonstrate a contagion effect in which an
entire region or class of investment is disfavored by international investors, Argentina could be adversely affected by negative economic or financial developments in other countries, which in turn may have an adverse effect on our financial
condition and results of operations.

There can be no assurance that the Argentine financial system and
securities markets will not be adversely affected by events in developed countries economies or events in other emerging markets. A slowdown in economic activity in Argentina would adversely affect our business, financial condition and results
of operations.

A lack of financing for Argentine companies, whether due to market forces or government regulation, may
negatively impact our financial condition or cash flows.

The prospects for Argentine companies of
accessing financial markets might be limited in terms of the amount of financing available, and the conditions and cost of such financing.

Following the default on its external debt in 2001, the Argentine government sought to restructure its outstanding debt by offering holders of the defaulted bonds two opportunities to exchange them for
newly issued debt securities, in 2005 and again in 2010. Holders of approximately 93% of Argentinas defaulted debt participated in the exchanges. Nonetheless, a number of bondholders who held out from the exchange offers have initiated legal
actions against the Argentine government. Since late 2012, rulings favorable to those bondholders in pending cases have deepened doubts about Argentinas ability to service its debt under the terms of foreign judgments, and have exacerbated
investors uncertainties as well as increased sovereign risk. In 2013, Argentine Congress approved a law that enables the government to take the necessary measures to complete the debt restructuring process, on terms that cannot overpass those
of the previous debt exchanges. A final, unappealable judgment against Argentina in these pending cases could lead to a default on its public debt and further reduce the sources of funding and investment capital that are available to Argentina,
which could limit the Argentine governments ability to adopt measures to promote economic growth. On August 23, 2013 the United States Second Circuit Court of Appeals ruled in favor of the bondholders. On November 18, 2013, the
Second Circuit Court of Appeals denied Argentinas petition for rehearing. On February 18, 2014, Argentina filed a petition asking the U.S. Supreme Court to review the decision of the Second Circuit Court of Appeals denying
Argentinas petition for a rehearing.

In addition, the foreign shareholders of several Argentine
companies, including public utilities and certain bondholders that did not participate in the exchange offers described above, have filed claims in excess of U.S.$15 billion with the International Centre for Settlement of Investment Disputes (the
ICSID), alleging that the emergency measures adopted by the Argentine government in 2002 do not meet the just and equal treatment requirements of several bilateral investment treaties to which Argentina is a party. While certain
plaintiffs have prevailed against Argentina in their ICSID proceedings, including most recently British Gas whose US$ 185 million award was upheld by the United States Supreme Court, Argentina has not yet honored such awards. However, in
October 2013, Argentina announced its willingness to put an end to certain of such claims by offering Argentine sovereign bonds in exchange for a waiver from such plaintiffs of any rights to further litigation.

The developments described above, the global economic crisis that started in the fourth quarter of 2008, and the
resulting international stock market crash and the insolvency of major financial institutions toward the end of 2008, have generally limited the ability of Argentine companies to access international financial markets as they had in the past or made
such access significantly more costly for Argentine issuers. Between June 2009 and 2011, a greater number of Argentine companies gained access to the international capital markets, albeit at conditions more onerous than competitors based in other
countries in the region. Since 2012, with few exceptions, Argentine companies have had little access to such markets. See Government intervention in the Argentine economy could adversely affect our results of operations or financial
condition.



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Argentinas past default and its ongoing litigation with holdout
creditors, and economic policy measures adopted by the Argentine government, may continue to prevent Argentine companies such as us from accessing the international capital markets readily or render the financial conditions of such access
significantly more onerous than for companies in other countries in the region, and may therefore negatively impact our financial condition or cash flows.

Recently approved Argentine judicial reform, as well as challenges thereto, have generated uncertainty with respect to future administrative and judicial proceedings involving the Argentine
government.

Law No. 26,854, which regulates injunctions in cases in which the Argentine
government is a party or has intervened, was promulgated on April 30, 2013 as part of a judicial reform bill approved by the Argentine Congress. Among the principal changes proposed in the judicial reform bill are a time limitation on
injunctions imposed in proceedings brought against the Argentine government and the creation of three new chambers of Casación (which hear appeals) prior to the intervention of the Supreme Court of Justice. In addition, Law
No. 26,855, which became effective on May 27, 2013, modified the structure and functions of the Argentine Consejo de la Magistratura (judicial council), which is in charge of appointing judges, of presenting charges against them,
and of suspending or deposing them. However, several legal challenges have been brought against these laws, leading to rulings which for the time being have prevented them from entering into full effect.

Although it is not possible to predict the degree to which the reforms, if and when the same become effective, might
affect future administrative and/or judicial proceedings, potential future claims by us against the Argentine government could be affected by these new laws.

Factors Relating to Our Business

Substantial or extended declines
and volatility in the prices of crude oil, oil products and natural gas may have an adverse effect on our results of operations and financial condition.

A significant amount of our revenue is derived from sales of crude oil, oil products and natural gas. Factors affecting international prices for crude oil and related oil products include: political
developments in crude oil producing regions, particularly the Middle East; the ability of the Organization of Petroleum Exporting Countries (OPEC) and other crude oil producing nations to set and maintain crude oil production levels and
prices; global and regional supply and demand for crude oil; competition from other energy sources; domestic and foreign government regulations; weather conditions; and global conflicts or acts of terrorism. We have no control over these factors.
Changes in crude oil prices generally result in changes in prices for related products. International oil prices have fluctuated widely over the last ten years.

Substantial or extended declines in international prices of crude oil and related oil products may have a material
adverse effect on our business, results of operations and financial condition, and the value of our proved reserves. In addition, significant decreases in the prices of crude oil and related oil products may cause us to reduce or alter the timing of
our capital expenditures, and this could adversely affect our production forecasts in the medium term and our reserves estimates in the future.

Argentine oil and gas production concessions and exploration permits are subject to certain conditions and may not be renewed or could be revoked.

Law No. 17,319 (the Hydrocarbons Law) provides for oil and gas concessions to remain in effect for 25
years as from the date of their award, and further provides for the concession term to be extended for up to 10 additional years, subject to terms and conditions approved by the grantor at the time of the extension. The authority to extend the terms
of current and new permits, concessions and contracts has been vested with the government of the province in which the relevant area is located (and the Argentine government in respect of offshore areas beyond 12 nautical miles). In order to be
eligible for the extension, any concessionaire and permit holder must have complied with its obligations under the Hydrocarbons Law and the terms of the particular concession or permit, including evidence of payment of taxes and royalties, the
supply of the necessary technology, equipment and labor force and compliance with various environmental, investment and development obligations. Under the Hydrocarbons Law, non-compliance with these obligations and standards may also result in the
imposition of fines and, in the case of material breaches, following the expiration of applicable cure periods, the revocation of the concession or permit. We cannot provide assurances that concessions that have not yet been renewed will be extended
or that additional investment, royalty payment or other requirements will not be imposed on us in order to obtain extensions. See Item 4. Information on the CompanyBusiness OverviewOil and Gas Exploration and
ProductionStatistical Information Relating to Oil and Gas Production.



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Our crude oil and natural gas reserves estimates involve some degree of uncertainty
which could adversely affect our ability to generate income.

Our oil and gas proved reserves are
estimated using geological and engineering data to determine with reasonable certainty whether the crude oil or natural gas in known reservoirs is recoverable under existing economic and operating conditions. The accuracy of proved reserve estimates
depends on a number of factors, assumptions and variables, some of which are beyond our control. Factors susceptible to our control include drilling, testing and production after the date of the estimates, which may require substantial revisions to
reserves estimates; the quality of available geological, technical and economic data used by us and our interpretation thereof; the production performance of our reservoirs and our recovery rates, both of which depend in significant part on
available technologies as well as our ability to implement such technologies and the relevant know-how; the selection of third parties with which we enter into business; and the accuracy of our estimates of initial hydrocarbons in place, which may
prove to be incorrect or require substantial revisions. Factors mainly beyond our control include changes in prevailing oil and natural gas prices, which could have an effect on the quantities of our proved reserves (since the estimates of reserves
are calculated under existing economic conditions when such estimates are made); changes in the prevailing tax rules, other government regulations and contractual conditions after the date estimates are made (which could make reserves no longer
economically viable to exploit); and certain actions of third parties, including the operators of fields in which we have an interest. See Item 4. Information on the CompanyOil and Gas Exploration and ProductionReserves.

As a result of the foregoing, measures of reserves are subject to revision. Any downward revision in our
estimated quantities of proved reserves could adversely impact our financial results by leading to increased depreciation, depletion and amortization charges and/or impairment charges, which would reduce earnings and shareholders equity.

Oil and gas activities are subject to significant economic, environmental and operational risks.

Oil and gas exploration and production activities are subject to particular economic and industry-specific operational
risks, some of which are beyond our control, such as production, equipment and transportation risks, as well as natural hazards and other uncertainties, including those relating to the physical characteristics of onshore and offshore oil or natural
gas fields. Our operations may be curtailed, delayed or cancelled due to bad weather conditions, mechanical difficulties, shortages or delays in the delivery of equipment, compliance with governmental requirements, fire, explosions, blow-outs, pipe
failure, abnormally pressured formations, and environmental hazards, such as oil spills, gas leaks, ruptures or discharges of toxic gases. If these risks materialize, we may suffer substantial operational losses and disruptions to our operations.
Drilling may be unprofitable, not only with respect to dry wells, but also with respect to wells that are productive but do not produce sufficient net revenues to return a profit after drilling, operating and other costs are taken into account.

We may not be able to replace our oil and gas reserves and this may have an adverse impact on our future results of
operations and financial condition.

In recent years, we have experienced a decline in reserves and
production (see Item 4. Information on the CompanyBusiness OverviewReservesInternal Control over Proved Reserves). The possibility of replacing our crude oil and gas reserves in the future is dependent on our ability to
access new reserves, both through successful exploration and reserve acquisitions. We consider exploration, which carries inherent risks and uncertainties, to be our main vehicle for future growth and reserves replacement.

Without successful exploration activities or reserve acquisitions, our proved reserves would decline as our oil and gas
production would be forced to rely on our current portfolio of assets.

We cannot guarantee that our
exploration, development and acquisition activities will allow us to offset the decline of our reserves. If we are not able to successfully find, develop or acquire sufficient additional reserves, our reserves and therefore our production may
continue to decline and, consequently, this may adversely affect our future results of operations and financial condition.

The Argentine government and provincial governments have intervened in the oil and gas industry in the past, and are likely to
continue to intervene.

The Argentine government has historically exercised significant influence over
the economy, including the energy sector, and companies such as us which operate in that sector have done so in a heavily regulated environment, aimed primarily at ensuring the satisfaction of domestic demand.

To address the Argentine crisis of 2001 and 2002, the Argentine Congress enacted the Public Emergency Law and other
emergency regulations, some of which remain in effect to date. Some of these regulations introduced a number of material changes to the regulatory framework applicable to the oil and gas industry in Argentina, and to other industries in which the
Companys associates are active, such as the electricity industry.

As of the date of this Annual Report,
the Public Emergency Law is still in effect. In addition, the Argentine government continues to introduce material changes to the regulatory regime applicable to the oil and gas industry, such as modifications to the Petróleo Plus
(Oil Plus) program, the revocation of the Refinación Plus (Refining Plus) program, and the obligation to repatriate and sell in the local market 100% of the foreign currency revenues obtained from oil and gas
exports.



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On April 17, 2012, the Argentine government submitted a bill to the
Argentine Congress calling for the expropriation of 51% of the shares of YPF owned by Repsol YPF S.A. (Spain). Effective May 7, 2012, the Argentine Congress enacted Law No. 26,741, sanctioning the expropriation of 51% of YPFs Class D
shares, out of the shares then held by Repsol YPF S.A. (Spain), and 51% of Repsol YPF GAS S.A., represented by 60% of its Class A shares then held by Repsol Butano S.A. (Spain).

Also, Law No. 26.741 defines the hydrocarbon activities (including the exploitation, industrialization,
transportation and commercialization thereof) in the territory of Argentina as a national public interest. On July 27, 2012, Decree No. 1,277/12 regulated various aspects of Law No. 26,741, specifically it
(a) abrogated the sections of Decrees No. 1,055/89, 1,212/89 and 1,589/89 (the Deregulation Decrees) that established the right to freely market the hydrocarbon production in the domestic and external market, and the exemption
from export withholdings, (b) created a Commission of Planning and Strategic Coordination of the National Hydrocarbon Investments Plan (the Commission), in charge of executing a National Hydrocarbon Investments Plan,
(c) established the obligation for hydrocarbon companies to submit their technical, production and economic data to the Commission, as well as their investment plans, and (d) granted broad powers to the Commission with the aim of
monitoring the investment plans and ensuring reasonable commercial prices in the domestic market. See Item 4. Information on the CompanyRegulation of our Business. Similarly, in 2012 the governors of ten hydrocarbon-producing
Argentine provinces signed the Acuerdo Federal de Hidrocarburos (Federal Hydrocarbons Accord), including among its principal objectives establishing self-sufficiency in oil and gas supplies as a state policy.

We cannot assure you that these or other measures that may be adopted by the Argentine government or provincial
governments with respect to the oil and gas industry will not have a material adverse effect on our business, financial condition or results of operations.

Limits on exports of hydrocarbons and related oil products have affected and may continue to affect our results of operations.

In recent periods, the Argentine government has introduced a series of measures limiting exports of hydrocarbons and
related oil products, which have prevented us from profiting from higher prices of these commodities in the international markets, and materially affected our competitiveness and results of operations.

In April 2004, to facilitate the recovery of natural gas prices, the Secretariat of Energy (SE) entered into
an agreement with natural gas producers, requiring them to sell a specified amount of gas in the local regulated market. During 2006, the SE required producers to redirect gas earmarked for export to supply local thermal power plants and gas
distribution companies. In January 2007, the SE confirmed that the ability to export hydrocarbons would be subject to the satisfaction of domestic demand and that export would have to be authorized on a case-by-case basis by the SE. These measures
prevented us from benefiting from higher margins in the international markets. In 2007, upon the expiration of the aforementioned agreement, the Argentine government and producers signed a new agreement effective until 2011 aimed at securing the
domestic supply of gas. On January 5, 2012, the SE decided to extend the temporary allocation rules and other criteria established by Resolution No. 599/2007 to set obligations for the timely supply of natural gas, as established under the
agreement with natural gas producers in effect from 2007 through 2011.

Under these agreements, temporary
limits on certain natural gas exports have been imposed to avoid a crisis in the local supply of natural gas, depriving us of higher margins in the international markets.

Pursuant to SE Resolution No. 1,679/04, since December 2004, producers must obtain the approval of the Argentine
government prior to exporting crude oil or diesel. To obtain this approval, exporters must demonstrate that they have either satisfied local demand requirements or have granted the domestic market the opportunity to acquire oil or diesel under terms
similar to current domestic market prices and, in the case of diesel, they must also demonstrate, if applicable, that commercial terms offered to the domestic market are at least equal to those offered to their own gas station network. Furthermore,
in December 2006, pursuant to SE Resolution No. 1,338/06, the SE extended these regulations to the export of gasoline, fuel oil and fuel oil mixtures, aero kerosene, jet fuel, lubricants, asphalts, coke and by-products for use in the
petrochemical industry. In January 2008, the Argentine government temporarily prohibited the exports of gasoline and diesel until the domestic market was fully supplied at the prices in force on October 31, 2007.

These restrictions may significantly and adversely affect the profitability of our operations, preventing us from
capturing the upside of export prices, and negatively impacting the total volume of refined products sold in the domestic market, due to our need to manage crude oil volumes processed in accordance with our storage capacity.

We cannot assure you that the Argentine government will not increase export restrictions on hydrocarbons and related oil
products, adversely affecting our financial condition and results of operations.



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Export taxes and import regulations on our products have negatively affected, and may
continue to negatively affect, the profitability of our operations.

On March 1, 2002, the
Argentine government imposed a withholding tax on exports of hydrocarbons, initially lasting five years. The export tax was extended in 2006 by Law No. 26.217 and in 2011 by Law No. 26.732 and is in effect through 2015. This tax framework
has prevented us from benefiting from significant increases in international prices for oil, oil related products and natural gas, hindered us from offsetting sustained increases in costs endemic to the energy industry, and materially affected our
competitiveness and results of operations. Effective November 2007, the Ministry of Economy adopted a more onerous method for calculating withholding taxes on exports of crude oil and certain oil by-products. On January 3, 2013, withholding
taxes on exports of crude oil were reduced, enabling a reduction of the gap between local and exports net prices. See Item 5. Operating and Financial Review and ProspectsFactors affecting our consolidated results of
operationsRegulations of the Energy Industry in ArgentinaWithholding Taxes on Exports.

In
addition, in 2012, the Argentine government adopted an import procedure pursuant to which local authorities must pre-approve any import of products and services to Argentina as a precondition to allow importers access to the foreign exchange market
for the payment of such imported products and services.

We cannot assure you that the Argentine government
will reduce current export tax rates and import regulations or will not increase them further. We cannot predict the impact that any changes may have on our results of operations and financial condition.

Limitations on local pricing in Argentina may adversely affect our results of operations.

In recent years, due to regulatory, economic and government policy factors, our domestic crude oil, gasoline, diesel and
other fuel prices have frequently lagged substantially behind prevailing international and regional market prices for such products, and our ability to increase prices has been limited. Likewise, the prices at which we sell natural gas in Argentina
(particularly to the residential sector) are subject to government regulations and currently are substantially below regional market prices for natural gas. Most recently, on April 10, 2013, Secretary of Domestic Trade Resolution No. 35/13
was published in the Official Gazette, setting maximum sales prices for liquid fuels for a period of six months, later extended for 45 additional days (Secretary of Domestic Trade Res. No. 108/13). Resolution No. 108/13 has not been
extended. In February 2014, the Argentine government agreed with some of the main oil companies and refineries a 6% maximum increase in their liquid fuels prices, subject to monthly review, and promoted individual agreements between producers and
refiners in order to apply gradual discounts in crude oil purchases. For additional information on domestic pricing for our products, see Item 5. Operating and Financial Review and ProspectsFactors Affecting our Consolidated Results of
OperationsRegulation of the Energy Industry in Argentina and Item 4. Information on the CompanyRegulation of our BusinessArgentine Regulatory Framework.

We cannot assure you that we will be able to increase the domestic prices of our products, and limitations on our ability
to do so will continue to adversely affect our financial condition and results of operations. Similarly, we cannot assure you that hydrocarbon prices in Argentina will track increases or decreases in hydrocarbon prices in the international or
regional markets.

Oil and gas prices could affect our level of capital expenditures.

The prices that we are able to obtain for our hydrocarbon products affect the viability of investments in new exploration,
development and refining activities, and as a result the timing and amount of our projected capital expenditures for such purposes. We budget capital expenditures by taking into account, among other things, market prices for our hydrocarbon
products. In the event that current domestic prices decrease, our ability to improve our hydrocarbon recovery rates, identify new reserves and carry out certain of our other capital expenditure plans is likely to be affected, which, in turn, could
have an adverse effect on our results of operations.

The Argentine government and our associated utility company are in
the process of renegotiating utility contracts, and the recoverability of our investments in such associate depends on the successful completion of these negotiations.

The macroeconomic situation of the country after the enactment of the Public Emergency Law impacted the economic and
financial condition of utility companies in Argentina. The combined effect of (i) the devaluation of the peso in 2002, (ii) the government decision to freeze rates in pesos without reflecting the impact of the devaluation and
(iii) financial debts primarily denominated in foreign currency, adversely affected the financial condition, results of operations and ability to satisfy financial obligations and pay dividends of utility companies. Although some of these
utility companies have been successful in restructuring their indebtedness, their return to financial stability and profitability on a long-term basis depends on a successful negotiation of tariff increases with the Argentine government.
Transportadora de Gas del Sur S.A. (TGS) has engaged in negotiations with the Utilities Contract Renegotiation and Analysis Committee (Unidad de Renegociación y Análisis de Contratos de Servicios Públicos, or
the UNIREN). However, to date, these discussions have not resulted in tariff increases sufficient for our associated utility company to return to financial stability and profitability. See Item 4. Information on the
CompanyGas and EnergyGas TransportationTGSTariff Renegotiation Process, and Item 4Regulation of Our BusinessArgentine Regulatory FrameworkNatural Gas and Electricity.



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Our activities may be adversely affected by events in other countries in which we do business.

Our operations are concentrated in Latin America, a region that has experienced significant economic,
social, political and regulatory volatility. In recent periods, many governments in Latin America have taken steps to assert greater control or increase their share of revenues from the energy sector, spurred by soaring oil and gas prices and
nationalist politics. See Item 4. Information on the CompanyRegulation of our BusinessesVenezuelan Regulatory Framework and Bolivian Regulatory Framework.

These risks are evidenced by changes in business conditions that we have experienced in Venezuela, Bolivia and Ecuador.
See Item 5. Operating and Financial Review and ProspectsFactors Affecting our Consolidated Results of Operations and Item 4. Information on the CompanyOil and Gas Exploration and
ProductionProductionProduction Outside Argentina.

We could be subject to organized labor action.

Many of our operations are highly labor-intensive and require a significant number of workers. The sectors in which we
operate are largely unionized. We have experienced organized work disruptions and stoppages in the past, frequently due to strikes by employees of contractors we employ. We cannot assure you that we will not experience such disruptions or work
stoppages in the future, and any such action could adversely affect our business and revenues.

In 2008,
unionized employees went on strike over salary increases, adversely affecting our operations. In 2008, in the Austral basin in Argentina, the pace of production slowed as a result of the labor strike held by our contractors employees
throughout May 2008, with an adverse impact on production levels in subsequent months. During each of 2009, 2010 and, to a lesser extent, 2011 and 2012, gas production in the Austral basin was affected by labor strikes. Except for trade union
conflicts at the Zárate Plant between the months of March and June 2013, there were no significant labor strikes in 2013.

We do not maintain insurance coverage for business interruptions, including business interruptions caused by labor actions. Strikes, picketing or other types of conflict with the unionized personnel may
adversely affect our results of operations and financial condition.

Our operations could cause environmental damage,
and any changes in environmental laws or regulations may increase our operational costs.

Some of our
operations are subject to environmental risks that may arise unexpectedly and result in material adverse effects on our results of operations and financial condition. In addition, the occurrence of any of these risks could result in personal
injuries, loss of life, environmental damage, clean-up and repair expenses, equipment damage and liability in civil and administrative proceedings. We cannot assure you that we will not incur additional costs related to the environment in the
future, which could negatively impact our results of operations and financial condition. In addition, we cannot assure you that the insurance coverage that we maintain is adequate to cover the losses that may potentially arise from these
environmental risks.

Furthermore, we are subject to extensive environmental laws and regulations both in
Argentina and in the other countries in which we operate. Local, provincial and national authorities in Argentina and other countries where we operate may implement new environmental laws and regulations, and are moving towards more stringent
enforcement of existing environmental laws and regulations, both of which may require us to incur higher compliance costs. For example, various initiatives in regions outside of Argentina have been made or proposed to regulate hydraulic fracturing
processes (which involve injecting water, sand and small volumes of chemicals into the wellbore to fracture the hydrocarbon-bearing rock thousands of feet below the surface to facilitate higher flow of hydrocarbons into the wellbore), and drilling
activities for non-conventional oil and gas reserves. The imposition of stringent regulatory and permitting requirements related to these practices in Argentina could significantly increase our cost of doing business.

We cannot predict the overall effects of implementing new environmental laws and regulations and/or the more stringent
enforcement of existing environmental laws and regulations on our financial condition and results of operations.

Risks Relating to Our
Shares and ADSs

Our principal shareholders can exercise control over the Company.

As of the date of this Annual Report, Petrobras holds 67.2% of our capital stock and voting rights and the ANSES holds
approximately 11.8% of our shares and voting rights. Petrobras will be able to determine or exercise significant influence on substantially all matters requiring approval by a majority of our shareholders, including the election of a majority of our
directors. Petrobras will also direct our operations and may be able to cause or prevent a change in our control. We cannot assure you that the interests of our principal shareholders will not diverge from interests of our other investors. See
Item 7. Major Shareholders and Related Party Transactions.



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Restrictions on capital outflows imposed by Argentina may impair your ability to
receive dividends and distributions on, and the proceeds of any sale of, the shares underlying the ADSs.

The government may impose temporary restrictions on capital movements in circumstances where a serious imbalance develops
in Argentinas balance of payments or where there are reasons to foresee such an imbalance. Additionally, commencing in October 2011, new regulations have been introduced by the Argentine government regarding the transfer of foreign currency
abroad. See Item 3. Key InformationExchange Controls. We cannot assure you that Argentina will not impose restrictions on capital outflows and/or foreign exchange which could impair or prevent the conversion of dividends,
distributions, or the proceeds from any sale of shares, as the case may be, from pesos into U.S. dollars and the remittance of the U.S. dollars abroad.

Under the terms of our Deposit Agreement with the depositary for the ADSs, the depositary will convert any cash dividend or other cash distribution we pay on the shares underlying the ADSs into U.S.
dollars if, in the judgment of the depositary, that conversion can be made on a practicable basis, and shall distribute such U.S. dollars in accordance with the Deposit Agreement, subject, in each case, to any restrictions under Argentine laws or
regulations or applicable permits issued by an Argentine governmental body. If the exchange rate fluctuates significantly during a time when the depositary cannot convert the foreign currency, you may lose some or all of the value of the dividend
distribution.

Under Argentine law, shareholder rights may be different from those in other jurisdictions.

Our corporate affairs are governed by our bylaws and Law No. 19,550 (the Argentine Companies Law), which
differ from the legal principles that would apply if we were incorporated in a jurisdiction in the United States or in other jurisdictions outside Argentina. In addition, rules governing the Argentine securities markets are different and may be
subject to different enforcement in Argentina than in other jurisdictions.

Sales of a substantial number of shares could decrease the
market prices of our shares and the ADSs.

Petrobras owns shares representing a significant majority of
our capital stock. Sales of a substantial number of shares or ADSs by Petrobras, the ANSES, or any other future significant shareholder, or the anticipation of such sales, could decrease the trading price of our shares and ADSs.

You may be unable to exercise preemptive, accretion or other rights with respect to the shares underlying your ADSs.

You may not be able to exercise the preemptive or accretion rights relating to the shares underlying your ADSs (see
Item 10. Additional InformationPreemptive Rights) unless a registration statement under the U.S. Securities Act of 1933 (the Securities Act) is made effective with respect to those rights or an exemption from the
registration requirements of the Securities Act is available. We are not obligated to file a registration statement with respect to the shares relating to these preemptive rights, and we cannot assure you that we will file any such registration
statement. Unless we file a registration statement or an exemption from registration is available, you may receive only the net proceeds from the sale of your preemptive rights by the depositary or, if the preemptive rights cannot be sold, they will
be allowed to lapse. As a result, U.S. holders of our shares or ADSs may suffer dilution of their interest in our company upon future capital increases.

In addition, under the Argentine Companies Law, foreign companies that own shares in an Argentine corporation are required to register with the Superintendency of Legal Entities (Inspección
General de Justicia, or the IGJ) in order to exercise certain shareholder rights, including voting rights. If you own our shares directly (rather than in the form of ADSs) and you are a non-Argentine company and you fail to register
with the IGJ, your ability to exercise your rights as a holder of our shares may be limited.

You may be unable to
exercise voting rights with respect to the shares underlying your ADSs at our shareholders meetings.

The depositary will be treated by us for all purposes as the shareholder with respect to the shares underlying your ADSs. As a holder of American Depositary Receipts (ADRs) representing the
ADSs being held by the depositary in your name, you will not have direct shareholder rights and may exercise voting rights with respect to the shares represented by the ADSs only in accordance with the Deposit Agreement relating to the ADSs. There
are no provisions under Argentine law or under our bylaws that limit the exercise by ADS holders of their voting rights through the depositary with respect to the underlying shares. However, there are practical limitations on the ability of ADS
holders to exercise their voting rights due to the additional procedural steps involved in communicating with these holders. ADS holders may be unable to exercise voting rights with respect to the shares underlying the ADSs as a result of these
practical limitations.



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Shareholders outside Argentina may face additional investment risk from currency
exchange rate fluctuations in connection with their holding of our shares or ADSs.

We are an Argentine
company and any future payments of dividends on our shares will be denominated in pesos. The peso has historically fluctuated significantly against many major world currencies, including the U.S. dollar. A depreciation of the peso would likely
adversely affect the U.S. dollar or other currency equivalent of any dividends paid on our shares and could result in a decline in the value of our shares and ADSs as measured in U.S. dollars.



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##### Table of Contents

Item 4. INFORMATION ON THE COMPANY

HISTORY AND DEVELOPMENT

History

Petrobras Argentina S.A.

PESA is a corporation (sociedad anónima) organized and existing under the laws of Argentina and registered
on November 17, 1947 with the Public Registry of Commerce, under No. 759, page 569, Book 47, Volume A, with a term of duration expiring June 18, 2046. Our principal place of business is located at Maipú 1, (C1084ABA), Buenos
Aires, Argentina. Telephone: 54-11-4344-6000, fax 54-11-4344-6315 and web site at www.petrobras.com.ar. Our process agent in the United States for certain contracts is CT Corporation System, located at 111 Eighth Avenue, New York, New York
10011. Our authorized representative in the United States for our registration statement with the SEC is Puglisi Associates, located at 850 Library Avenue, Suite 204, Newark, Delaware 19711.

We are an integrated energy company,engaged in oil and gas exploration and production, refining,
petrochemicals, electricity generation and transmission, and hydrocarbon marketing and transportation. As of December 31, 2013, we maintained operations primarily in Argentina, and to a lesser extent in Bolivia, Ecuador, Mexico and Venezuela.
Our operations are currently divided into four business segments that are in turn supported by corporate functions. The four business segments are: (1) Oil and Gas Exploration and Production, (2) Gas and Energy, (3) Refining and
Distribution, and (4) Petrochemicals.

PESA was founded in 1946 under the name
Compañía Naviera Pérez Companc as a shipping company by the Pérez Companc family. In the mid-1950s, the Company began its forestry operations when it acquired an important forestry area in northeastern
Argentina. In the 1960s, it began servicing oil wells; over time, its maritime operations were gradually discontinued and replaced by oil-related activities.

The development of our oil and gas business is marked by two significant events. The first occurred in 1991 when we were awarded concessions to operate Puesto Hernández, one of the most important
oil fields in Argentina in terms of reserves and production, located in the provinces of Neuquén and Mendoza, and the Faro Vírgenes and Santa Cruz areas in the Austral basin, located in the province of Santa Cruz. As a result of these
concessions, we have become one of the largest oil and gas producers in Argentina.

The second event that was
a key factor in our oil and gas operations growth occurred in March 1994 when PESA was awarded the Oritupano-Leona area in Venezuela. This was the first step towards a significant regional expansion of our businesses.

Between 1990 and 1994, many state-owned enterprises were privatized in Argentina. As a result, PESA acquired interests in
companies operating in the natural gas transportation and distribution, electricity generation, transmission and distribution, oil transportation, storage and shipment and refining sectors. These activities have since that time formed our core
business.

PESA has in the past conducted operations in other industries, including construction, real estate,
telecommunications, mining and agriculture. Beginning in 1997, and through successive divestments, PESA restructured its business strategy with a focus on the energy sector in Argentina. As a result of these divestitures and the development of our
energy businesses, PESA has become a vertically-integrated energy company whose operations are mainly located in Argentina.

Corporate reorganization of PESA and PEPSA

On September 2, 2008, the respective boards of directors of PESA and PEPSA each approved a preliminary agreement for
the merger of the companies through the absorption of PEPSA by PESA. The effective merger date was set at January 1, 2009. As of that date, all assets, liabilities, rights and obligations of the absorbed company were incorporated into Petrobras
Energía. Immediately following the merger, Petrobras continued holding 67.2% of the outstanding shares of Petrobras Energía.

On January 30, 2009, the respective special shareholders meetings of PESA and PEPSA approved the merger of the companies, pursuant to which PEPSA was merged and absorbed into PESA, as surviving
company. The respective boards of directors of PESA and PEPSA each approved the merger agreement between the two companies on April 14, 2009. This reorganization was authorized by Resolution No. 16,131 and subsequently registered with the
IGJ.

As a result of such corporate reorganization, shareholders of PEPSA received shares of PESA (in the
United States, in the form of ADSs), and the ADSs of PEPSA were removed from listing on the NYSE and from registration with the SEC. Immediately subsequent to this exchange of shares, ADSs, each representing 10 Class B shares of PESA, were listed
and began trading on the NYSE.



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Change of corporate name

On March 27, 2009, the general regular and special shareholders meeting of PESA approved the change of the
Companys corporate name to Petrobras Argentina S.A., which became effective on July 19, 2010, at which time the CNV notified PESA of the registration of the change of its corporate name with the IGJ.

Capital Expenditures and Divestitures

For a description of our capital expenditures see Item 5. Operating and Financial Review and ProspectsLiquidity and Capital Resources.

For a description of our most significant recent divestitures, see Item 4. Information on the CompanyOil and
Gas Exploration and ProductionProductionProduction Outside ArgentinaEcuador, Item 5. Operating and Financial Review and ProspectsFactors Affecting Our Consolidated Results of OperationsDivestment of
Innova and Divestment of Distrilec.

BUSINESS OVERVIEW

Our Strategy

Our long-term strategy is to grow as a vertically integrated energy company in Argentina, while being a leader in profitability as well as social and environmental responsibility.

The main points of this strategy are:



| |  |  | Setting our focus on our Argentine operations.
| | - |  | ----------------------------------------------



| |  |  | Increasing oil and gas reserves and maintaining production levels through profitable operations with a commitment to social and environmental
responsibility.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Seeking profitability in the downstream business in Argentina, through a balanced crude productionrefininglogisticsdistribution
chain.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Generating energy solutions through the development of businesses in the Gas and Energy segment.
| | - |  | ------------------------------------------------------------------------------------------------



| |  |  | Maintaining our position in styrenics markets.
| | - |  | ----------------------------------------------



| |  |  | Maintaining financial solvency, while pursuing operating and management efficiency and the development of human resources.
| | - |  | --------------------------------------------------------------------------------------------------------------------------

In order to fulfill this strategy, we consider the following to be essential:



| |  |  | A commitment to protecting the quality of our goods and services, the environment and the health and safety of our employees, contractors and
neighboring communities.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Adoption of, and compliance with, corporate governance practices consistent with recognized best practices.
| | - |  | -----------------------------------------------------------------------------------------------------------



| |  |  | Maintenance of a management style that favors communication and teamwork, fostered by the value of the people that work in our organization.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Developing new business opportunities in order to maximize potential synergies and capitalize on complementary business opportunities with
Petrobras.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------

We currently manage our activities, with the support of a corporate center, in
four business segments: (1) Oil and Gas Exploration and Production, (2) Gas and Energy, (3) Refining and Distribution, and (4) Petrochemicals.

Our Principal Market

PESA is an Argentine
sociedad anónima. As of December 31, 2013, approximately 77% of our total assets, 99% of our sales, 90% of our combined crude oil and gas production and 86% of our proved oil and gas reserves were located in Argentina.
Fluctuations in the Argentine economy and actions adopted by the Argentine government have had and may continue to have a significant effect on Argentine private sector entities, including us. Specifically, we have been affected and may in the
future be affected by inflation, interest rates, fluctuations in the value of the peso against foreign currencies, price and export controls on oil and oil by-products, business regulations, changes in tax regulations and in general by the
political, social and economic environment affecting Argentina and other countries. See Item 3. Key InformationRisk FactorsFactors Relating to Argentina.



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##### Table of Contents

Historically, the Argentine economy has been characterized by its
macroeconomic instability and by periods of low or negative growth and high and variable levels of inflation and currency devaluation. In 1988, 1989 and 1990, the annual inflation rates were approximately 388%, 4,924% and 1,344%, respectively, based
on the Argentine consumer price index, and approximately 422%, 5,386% and 798%, respectively, based on the Argentine wholesale price index. As a result of inflationary pressures, the Argentine currency was devalued repeatedly during the 1960s, 1970s
and 1980s. Macroeconomic instability led to broad changes in the real exchange rate of the Argentine currency relative to the U.S. dollar. To address these pressures, the Argentine government implemented various plans and utilized a number of
exchange rate systems and controls.

In the 1990s, deep and drastic economic reforms were implemented in terms
of state reform, privatization of public companies and utilities, and opening of the economy. The pillar of the economic reform was the Convertibility Law enacted in 1991. The Convertibility Law fixed the exchange rate at one Argentine peso per U.S.
dollar and required that the Central Bank maintain reserves in gold and foreign currency at least equivalent to the monetary base. Between 1991 and 1997, the economy experienced growth, with exchange stability and low inflation rates.

Partly due to the convertibility model, in 1998 the Argentine economy entered a recession period, hitting its lowest
point in December 2001, which resulted in a massive withdrawal of deposits and capital outflow. In light of the situation, following a strong contraction of GDP, the Argentine government implemented a number of monetary, banking and exchange control
measures, which proved to be insufficient and caused a sharp rise in social discontent. This triggered a political, social and economic crisis.

On January 1, 2002 Argentina suspended the payment of a portion of its sovereign debt. Later that month, the Argentine Congress enacted the Public Emergency Law, whereby monetary, financial and
exchange measures were implemented to overcome the economic crisis in the short term. These events resulted in dramatic changes in the economic model and put an end to the U.S. dollar-peso parity, leading to a significant devaluation of the
Argentine peso.

The Argentine government then implemented a number of far-reaching initiatives, which
included:



| |  |  | Pesification of certain assets and liabilities denominated in foreign currency held in Argentina;
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | Amendment of the charter of the Central Bank, authorizing it to issue money in excess of the foreign currency reserves, grant short-term loans to
the Argentine government and provide financial assistance to financial institutions with liquidity or solvency problems;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Pesification of, and elimination of indexing clauses for, utility rates, fixing those rates in pesos at the Ps. 1.00=U.S.$1.00 exchange rate;
and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Implementation of taxes on hydrocarbon exports and certain related oil products, among others.
| | - |  | ----------------------------------------------------------------------------------------------

In 2002, commercial and financial activities were virtually paralyzed, further aggravating the economic recession, which
resulted in a 10.9% decline in GDP. Within this context, the peso devalued 238% against the U.S. dollar and wholesale inflation grew 118.2%. Towards the end of 2002, the Argentine government implemented different measures aimed at stimulating the
economy and eliminating certain restrictions to gradually normalize the foreign exchange market and the commercial and financial flow of foreign currency.

During the years that followed the 2001 crisis, the activity level exhibited an accelerated recovery, taking advantage of existing idle capacity, a high real exchange rate and increased international
prices for commodities. During this period, inflation remained stable and there was an excess supply of U.S. dollars, supported by a significant trade surplus. The Central Bank sought to prevent the nominal appreciation of the Argentine peso by
purchasing foreign currency, increasing its international reserves.

During that same period, the Argentine
government maintained a surplus in its public accounts. In 2005, the Argentine government was able to restructure the debt in default with 76% of creditors accepting the governments exchange offer proposal, which included reductions in
principal amount, term extensions and reductions in interest rates. Early in 2006, Argentina prepaid its debt outstanding with the IMF (around U.S.$10 billion) using freely available Central Bank reserves. Between 2004 and 2008, Argentina recorded
primary budget surpluses in excess of 3% of GDP at national levels. According to the Ministry of Economy, the primary surplus fell to 1.5% in 2009, 1.7% in 2010 and 0.3% in 2011, and primary budget deficits of 0.2% and around 0.8% of GDP were
recorded in 2012 and 2013, respectively.

According to inflation data published by the INDEC, from 2008 to
2013, the Argentine consumer price index increased 7.2%, 7.7%, 10.9%, 9.5%, 10.8% and 10.9%, respectively; and the wholesale price index increased 8.8%, 10.3%, 14.6%, 12.7%, 13.1% and 14.7%, respectively. However the INDEC has since 2007 experienced
a process of institutional and methodological reforms that have given rise to controversy with respect to the reliability of the information that it produces. Reports published by the IMF state that their staff uses alternative measures of inflation
for macroeconomic surveillance, including data produced by private sources, which have shown inflation rates considerably higher than those published by the INDEC since 2007. The IMF has also issued a declaration of censure against Argentina in
connection with its breach of its related obligations to the IMF under the Articles of Agreement for failing to make sufficient progress in adopting remedial measures to address the quality official data, including inflation and GDP data. See
Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaEconomic and political instability in Argentina has affected and may continue to adversely affect our financial condition and results of operations.



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In 2008, unlike previous years and despite the benefit of record commodity
prices, the foreign currency supply did not show a surplus, reserves at the Central Bank stagnated and the nominal exchange rate showed a depreciation, triggered by capital outflows. Within this context, and with the combined effect of an
international environment affected by the financial crisis and reduced domestic growth, the Argentine government was unable to raise sufficient voluntary funds to make its foreign debt payments and had to resort mostly to intra-public sector
financing. Consequently, Argentine country-risk exhibited a clear upward trend, ultimately reaching approximately 1,800 basis points. In November 2008 the Argentine Congress passed a bill that eliminated the private pension system and provided for a
transfer of all assets and liabilities managed by the private pension system to the public pension regime. This allowed the Argentine government access to additional funds in the short term.

In 2009, the Argentine economy was affected by a serious drought that negatively impacted harvests, together with lower
commodity prices and reduced external demand resulting from the global crisis. In this context, industrial production suffered a deeper impact than non-industrial activities. The Argentine economy recovered in the second half of the year, resulting
in a GDP increase of 0.9%, according to the INDEC. The Argentine trade balance surplus increased to over U.S.$16 billion in 2009, compared to U.S.$12 billion in 2008 and U.S.$11 billion in 2007, as a result of imports contracting more rapidly than
exports. Exports were mainly affected by fewer sales of commodities due to the drought. In spite of this significant trade surplus, the reserves at the Central Bank ended the year at levels similar to those recorded at the end of 2008. Private
foreign currency demand grew during the first part of the year, but then dropped progressively as a result of more favorable domestic and overseas macroeconomic trends. The peso-dollar exchange rate tracked this evolution, reflecting a higher
depreciation rate at the beginning of the year and greater stability in the last months of the period. The exchange rate closed the year at Ps. 3.80 = U.S.$1.00 (a 10% depreciation), with an average rate of Ps. 3.73 = U.S.$1.00 in the twelve-month
period.

In 2010, the Argentine economy registered an increase in real GDP of approximately 9%. The increased
economic activity during 2010 boosted imports by more than 40%, resulting in the trade balance surplus dropping to U.S.$12 billion, as the increase in imports was only partially offset by an increase of approximately 20% in exports as a consequence
of the good harvest and strong international prices. Central Bank reserves increased by over U.S.$4.0 billion in 2010 to approximately U.S.$52.1 billion at the end of the year, in spite of withdrawal of reserves to support payments to sovereign
multilateral lenders and bondholders. In May 2010, the Argentine government made a new exchange offer to holders of its pre-2001 bonds that did not participate in the 2005 restructuring, representing an amount of U.S.$18.7 billion. The acceptance
rate for the exchange was above 60% of the overall amount. The exchange rate in 2010 averaged Ps. 3.91 = U.S.$1.00, and closed 2010 at Ps. 3.98 = U.S.$1.00.

In 2011, the Argentine economy continued growing, with a further increase in GDP of approximately 9%. A large increase in public expenditures and extension of credit facilities, as well as a good harvest
and high international prices, positively impacted internal demand. Financial intermediation, trade and investment in construction were some of the most dynamic sectors. This increase in activity levels resulted in another large increase in imports
(approximately 30%), which was partially offset by a 25% increase in exports; thus, the trade balance recorded a U.S.$10.3 billion surplus for the year. Energy imports grew substantially during 2011, resulting in a negative energy trade balance of
U.S.$2.9 billion. Despite the trade surplus, the foreign exchange supply was reduced due to lower inflow of funds from loans and direct foreign investment and, primarily, increasing capital outflows as a consequence of portfolio dollarization. The
Argentine government continued using free available reserves to pay for its foreign debt maturities and the Central Banks reserves dropped by U.S.$5.8 billion, to approximately U.S.$46.3 billion. The exchange rate averaged Ps. 4.13 per
U.S.$1.00 in 2011, and closed the year at Ps. 4.30 = U.S.$1.00, 8% higher compared to the previous year-end. Interest rates showed a significant increase, especially during the last quarter. Finally, Argentine country risk reached an annual average
of 676 basis points, growing substantially from August 2011 onward, reaching 927 basis points as of December 31, 2011.

Presidential elections held on October 23, 2011 resulted in the reelection of President Cristina Fernández de Kirchner, with 54% of the votes cast.

In 2012, growth in the Argentine economy diminished as compared to 2011, registering a GDP increase of 1.9% according to
the INDEC, as a result of domestic and global factors including the European debt crisis, the slowdown of emerging economies, and the effects of a short drought period and a subsequent flood period. Domestic demand was the main factor contributing
to the positive variation in GDP. Exports fell 3% compared to the previous year, mainly due to the above mentioned global factors, while imports declined 7%, resulting in a trade surplus of over U.S.$12 billion. Despite such trade surplus, the
Central Banks reserves closed the year at U.S.$43.1 billion, a decrease of approximately U.S.$ 3 million compared to 2011, as a consequence of the use by the Argentine government of the Central Banks reserves to honor sovereign
foreign debt commitments.

During 2012, the Central Bank continued implementing an expansive monetary policy.
The exchange rate closed at Ps. 4.91 per U.S.$1.00 by the end of the year, representing a 14% year-on-year depreciation of the peso.

The Argentine country risk premium located slightly below 1.000 basic points as of the end of the year. On March 22, 2012, the Argentine Congress enacted Law No. 26,739, which amended the
charter of the Central Bank and the Convertibility Law. This new law amended the objectives of the Central Bank (established in its charter) and removed certain provisions previously in force. Pursuant to the terms of the new law, the Central Bank
will focus on promoting monetary and financial stability as well as development with social equity. In addition, the concept of freely available reserves was eliminated, granting the Argentine government access to additional reserves to
pay debt. In addition, since late 2011, the Argentine government has also adopted numerous measures to control directly or indirectly foreign trade and foreign exchange markets.



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In 2013, real GDP economy registered an increase of 3% according to the
INDEC, mainly as a result of the favorable performance of the agricultural sector. Industrial activity, on the other hand, slightly decreased compared to 2012, being the automotive industry one of few sectors with positive variations. The trade
balance resulted in a surplus of U.S.$ 9 billion, a decrease of approximately U.S.$ 3 billion compared to 2012. Central Banks reserves closed 2013 at U.S.$ 30.6 billion, accounting for a cumulative decline of U.S.$ 12.5 billion from
December 31, 2012. The Peso/U.S. dollar exchange rate closed at P$6.49 per U.S.$ 1.00. See Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaEconomic and political instability in Argentina has affected and
may continue to adversely affect our financial condition and results of operations.

Argentinas
oil and gas production showed an average decline of 2% and 5%, respectively, in 2013 compared to 2012 according to the SE. In the case of oil, exportable balances of crude oil diminished, while in the case of natural gas, domestic supply continued
supplemented with natural gas imports from Bolivia and LNG (liquefied natural gas) through the regasification centers in Escobar and Bahía Blanca. Liquid fuel demand increased, with diesel demand growing slightly over 1% and demand for
gasoline an increase of approximately 8%. Electricity demand recorded a 3.3% increase compared to 2012. See Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaEconomic and political instability in Argentina has
affected and may continue to adversely affect our financial condition and results of operations.



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OIL AND GAS EXPLORATION AND PRODUCTION

Overview

The core of our operations is the Oil and Gas Exploration and Production business segment, as this is a key link in our
business chain. This business segments strategy is to increase oil and gas reserves and maintain production levels through profitable operations with a commitment to social and environmental responsibility. This strategy is focused on four
main initiatives:



| |  |  | Exploration for reserve replacement;
| | - |  | ------------------------------------



| |  |  | Optimization of operations and existing infrastructure as leverage for new projects;
| | - |  | ------------------------------------------------------------------------------------



| |  |  | Development and monetization of non-conventional gas reserves; and
| | - |  | ------------------------------------------------------------------



| |  |  | Portfolio management through acquisition of reserves.
| | - |  | -----------------------------------------------------

As of December 31, 2013, we participated in oil and gas exploration and production activities in Argentina
and in other Latin American countries, including Venezuela (through our equity interest in mixed-ownership companies (empresas mixtas)) and Bolivia.

As of December 31, 2013, our combined crude oil and natural gas proved reserves, including our share of the reserves
of our unconsolidated investees, were estimated at 205.1 million barrels of oil equivalent (MMboe) (compared to 215.3 MMboe as of December 31, 2012), approximately 55% of which were proved developed reserves and approximately
45% of which were proved undeveloped reserves. Crude oil accounted for approximately 40% of our combined proved reserves, while natural gas accounted for approximately 60%. As of December 31, 2013, 86% of our total combined proved reserves were
located in Argentina and 14% were located abroad.

During 2013, our combined oil and gas production in
Argentina averaged 87,800 barrels of oil equivalent per day, including unconsolidated investees. Our total oil and gas production for this period, including our share in the production of unconsolidated investees, averaged 97,100 barrels of oil
equivalent per day (compared to 101,600 barrels of oil equivalent per day in 2012). Crude oil accounted for approximately 51,986 barrels per day, while natural gas accounted for approximately 270,5 million cubic feet per day
(MMcf/d), or 45,082 barrels of oil equivalent per day based on a measure of conversion of 6,000 cubic feet of gas per barrel of oil equivalent. Approximately 88% of our oil production and 93% of our gas production during 2013 was derived
from our operations in Argentina.

On May 31, 2012, we agreed to acquire an additional 39.671% equity
interest in Petrolera Entre Lomas S.A. (PELSA) from our controlling company Petrobras Participaciones S.L. (PPSL) for U.S.$249.4 million, increasing our share in PELSA to 58.881%. See Item 7. Major Shareholders and
Related Party TransactionsRelated Party TransactionsSale of Companies. PELSA performs oil and gas exploration and production activities in Argentina, and the remaining shares of PELSA are owned by APCO Oil and Gas International
Inc. Sucursal Argentina (APCO). As of December 31, 2013, PELSA owned three concessions in oil and gas production areas in Argentina, of which the Entre Lomas field (in the Provinces of Neuquén and Río Negro) is the
most important. PELSA holds a 73.15% interest in the Entre Lomas field, in which APCO holds 23% and we hold a 3.85% stake.

On January 31, 2014, our Board of Directors approved the sale to YPF S.A. of our entire interest in the Puesto Hernández Joint Operation (UTE) agreement, for a total price of U.S.$40.7
million. This transaction represented for us an early termination of the agreement entered into with YPF S.A. in 1991 to operate Puesto Hernández, which is an area covering 147 km2and located in the Provinces of Neuquén and Mendoza. Prior to transferring our interest in the Joint Operation
(UTE) agreement to YPF S.A., our share of Puesto Hernandezs daily production was approximately 4,000 barrels of oil per day.

Integration with our Refining and Distribution business segment enables us to process a large part of our crude oil production in Argentina. In addition, in Argentina our Oil and Gas Exploration and
Production business segment supplies gas to our Petrochemical, Refining and Energy operations.

Our Oil and Gas Exploration and
Production Interests

As is common in the Oil and Gas Exploration and Production business, we generally
participate in exploration and production activities in conjunction with joint operation partners. Contractual arrangements among participants in a joint operation are usually governed by an operating agreement, which provides that costs,
entitlements to production and liabilities are to be shared according to each partys percentage interest in the joint operations. One party of the joint operation is usually appointed as operator and is responsible for conducting the
operations under the overall supervision and control of an operating committee that consists of representatives of each party to the joint operations. While operating agreements generally provide for liabilities to be borne by the participants
according to their respective percentage interest, licenses issued by the relevant governmental authority generally provide that participants in joint operations are jointly and severally liable for their obligations to that governmental authority
pursuant to the applicable license. In addition to their interest in field production, contractual operators are generally paid their indirect administrative expenses on a monthly basis by their partners in proportion to their participation in the
relevant field.



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As of December 31, 2013, we had interests in 38 blocks: 23 oil and gas
production blocks (18 in Argentina and five outside Argentina) and 15 exploration blocks located within exploration areas or pending authorization for production (all of them located in Argentina). As of December 31, 2013, we were directly or
indirectly the contractual operator of 25 of the 38 blocks in which we had an interest.

As of
December 31, 2013, our total gross and net productive wells were as follows:



|                          |  |     |       |  |     |  |     |       |  |  |       | 
|------------------------- |  | --- | ----- |  | --- |  | --- | ----- |  |  | ----- | 
|                          |  | Oil |       |  | Gas |  |     | Total | 
|Gross productive wells(1) |  |     | 3,157 |  |     |  | 378 |       |  |  | 3,535 | 
|Net productive wells(2)   |  |     | 1,663 |  |     |  | 263 |       |  |  | 1,925 | 



| | (1) | Refers to number of wells completed.
| | --- | ------------------------------------

| | (2) | Refers to fractional ownership working interest in gross productive wells.
| | --- | --------------------------------------------------------------------------

As of December 31, 2013, our total production and exploration acreage, both gross and net, was as follows:



|          |  |                         |       |  |                 |  |       |       |  |  |         |     |  |  |       |    
|--------- |  | ----------------------- | ----- |  | --------------- |  | ----- | ----- |  |  | ------- | --- |  |  | ----- | ---
|          |  | Acreage                 |      
|          |  | Production
(1)          |       |  | Exploration
(2) | 
|          |  | Gross                   |       |  | Net (3)         |  |       | Gross |  |  | Net (3) |    
|          |  | (in thousands of acres) |      
|Argentina |  |                         | 4,123 |  |                 |  | 2,784 |       |  |  | 15,974  | (4) |  |  | 5,331 | (5)
|Venezuela |  |                         | 485   |  |                 |  | 126   |       |  |  |        |     |  |  |      |    
|Bolivia   |  |                         | 56    |  |                 |  | 56    |       |  |  |        |     |  |  |      |    
|          |  |                         |       |  |                 |  |       |       |  |  |         |     |  |  |       |    
|Total     |  |                         | 4,664 |  |                 |  | 2,966 |       |  |  | 15,974  |     |  |  | 5,331 |    
|          |  |                         |       |  |                 |  |       |       |  |  |         |     |  |  |       |    



| | (1) | Includes all areas in which we produce commercial quantities of oil and gas or areas in the development stage.
| | --- | --------------------------------------------------------------------------------------------------------------

| | (2) | Includes all areas in which we are allowed to perform exploration activities but where commercial quantities of oil and gas are not produced, plus
areas that are not in the development stage.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (3) | Represents our fractional ownership working interest in the gross acreage.
| | --- | --------------------------------------------------------------------------

| | (4) | Includes 14,300 thousand exploration acres in offshore areas.
| | --- | -------------------------------------------------------------

| | (5) | Includes 4,139 thousand exploration acres in offshore areas.
| | --- | ------------------------------------------------------------

The following table sets forth the number of total wells we drilled in Argentina and outside Argentina and the results
for the relevant periods. A development well, for purposes of the following table, is one that justifies the installation of permanent equipment for the production of oil or gas. A well is deemed to be a dry well if it is determined to be incapable
of commercial production. Gross wells drilled in the table below refers to the number of wells completed during each fiscal year, regardless of the spud date, and net wells drilled relates to our fractional ownership working
interest in wells drilled. This table includes wells drilled by our subsidiaries, joint operations and associates.



|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|-------------------- |  | ----------------------- | -- |  | --------- |  | - | ------------------- |  |  | --------- |  |  | --------- | -- |  | -------------------- |  | - | --------- |  |  | --------- |  |  | ------------------- | --- |  |  |  | -- |  |  |  | - | 
|                     |  | Year ended December 31, |   
|                     |  | 2013                    |    |  | 2012      |  |   | 2011                | 
|                     |  | Argentina               |    |  | Venezuela |  |   | Rest ofLatinAmerica |  |  | Argentina |  |  | Venezuela |    |  | Rest of LatinAmerica |  |   | Argentina |  |  | Venezuela |  |  | Rest ofLatinAmerica |    
|Gross wells drilled: |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Production:          |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Development wells:   |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Oil                  |  |                         | 81 |  |           |  | 6 |                     |  |  |          |  |  |           | 86 |  |                      |  | 8 |           |  |  |          |  |  |                     | 95  |  |  |  | 12 |  |  |  |  | 
|Gas                  |  |                         | 10 |  |           |  |  |                     |  |  |          |  |  |           | 11 |  |                      |  |  |           |  |  | 2         |  |  |                     | 14  |  |  |  |   |  |  |  |  | 
|Dry wells            |  |                         | 1  |  |           |  |  |                     |  |  |          |  |  |           |   |  |                      |  | 1 |           |  |  |          |  |  |                     |    |  |  |  | 1  |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Total                |  |                         | 92 |  |           |  | 6 |                     |  |  |          |  |  |           | 97 |  |                      |  | 9 |           |  |  | 2         |  |  |                     | 109 |  |  |  | 13 |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Exploration:         |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Exploratory wells:   |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Oil                  |  |                         | 3  |  |           |  |  |                     |  |  |          |  |  |           |   |  |                      |  | 1 |           |  |  |          |  |  |                     | 3   |  |  |  |   |  |  |  |  | 
|Gas                  |  |                         | 2  |  |           |  |  |                     |  |  |          |  |  |           | 2  |  |                      |  |  |           |  |  |          |  |  |                     |    |  |  |  |   |  |  |  |  | 
|Dry wells            |  |                         |   |  |           |  |  |                     |  |  |          |  |  |           | 3  |  |                      |  |  |           |  |  |          |  |  |                     | 2   |  |  |  |   |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Total                |  |                         | 5  |  |           |  |  |                     |  |  |          |  |  |           | 5  |  |                      |  | 1 |           |  |  |          |  |  |                     | 5   |  |  |  |   |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Net wells drilled:   |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Production:          |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Productive wells:    |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Oil                  |  |                         | 60 |  |           |  | 1 |                     |  |  |          |  |  |           | 69 |  |                      |  | 2 |           |  |  |          |  |  |                     | 55  |  |  |  | 3  |  |  |  |  | 
|Gas                  |  |                         | 6  |  |           |  |  |                     |  |  |          |  |  |           | 9  |  |                      |  |  |           |  |  | 2         |  |  |                     | 10  |  |  |  |   |  |  |  |  | 
|Dry wells            |  |                         |   |  |           |  |  |                     |  |  |          |  |  |           |   |  |                      |  |  |           |  |  |          |  |  |                     |    |  |  |  |   |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Total                |  |                         | 66 |  |           |  | 1 |                     |  |  |          |  |  |           | 78 |  |                      |  | 2 |           |  |  | 2         |  |  |                     | 65  |  |  |  | 3  |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Exploration:         |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Discovery wells:     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Oil                  |  |                         | 2  |  |           |  |  |                     |  |  |          |  |  |           |   |  |                      |  |  |           |  |  |          |  |  |                     | 1   |  |  |  |   |  |  |  |  | 
|Gas                  |  |                         | 1  |  |           |  |  |                     |  |  |          |  |  |           | 1  |  |                      |  |  |           |  |  |          |  |  |                     |    |  |  |  |   |  |  |  |  | 
|Dry wells            |  |                         |   |  |           |  |  |                     |  |  |          |  |  |           | 3  |  |                      |  |  |           |  |  |          |  |  |                     | 1   |  |  |  |   |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 
|Total                |  |                         | 3  |  |           |  |  |                     |  |  |          |  |  |           | 4  |  |                      |  |  |           |  |  |          |  |  |                     | 2   |  |  |  |   |  |  |  |  | 
|                     |  |                         |    |  |           |  |   |                     |  |  |           |  |  |           |    |  |                      |  |   |           |  |  |           |  |  |                     |     |  |  |  |    |  |  |  |   | 



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Veta Escondida Exploitation Concession

On April 4, 2012, we were notified of a decision of the government of the Province of Neuquén to terminate our
production concession in the Veta Escondida area. We have sought judicial relief, alleging that we have complied with all requirements under the concession and that we did not commit any breach which would support the decision adopted by the
government of Neuquén.

On December 19, 2013, we (as operators) and Total Austral, having an
interest of 55% and 45% in the Veta Escondida exploitation concession, respectively, reached an out-of-court agreement with the Province of Neuquén and Gas y Petróleo del Neuquén (GyP), to settle the dispute arising
from the enactment of Provincial Decree No. 563/12, which declared the expiration of the concessionaires rights under this exploitation concession and led us to bring a complaint against the Province of Neuquén.

The issuance of a Provincial Executive Branch Decree approving this agreement is pending.

Production

Argentine Oil and Gas
Production

Rights to develop oil and gas fields in Argentina are currently awarded by the provincial
governments through concessions and exploration permits. Concessions are generally granted for periods of 25 years and are typically renewable for a maximum term of ten years, and permits are generally granted for initial periods of four years.
Concessionaires in Argentina are entitled to gross proceeds from production sales. All permanent fixtures, materials and equipment are under the control of the concessionaire, although they revert to the Argentine government at the end of the
concession. Royalties based on production are paid to the respective Argentine provinces. Pursuant to the Hydrocarbons Law, concessionaires must pay royalties equivalent to 12% of the wellhead price of crude oil and natural gas, and a province may
require the payment of a higher royalty rate upon renewal of a concession. The wellhead price is calculated by deducting freight and other sales related expenses from the sale prices obtained from transactions with third parties.

We transport our oil and gas production in several ways depending on the infrastructure available and the cost efficiency
of the transportation system in a given location. We use the oil pipeline system and oil tankers to transport oil to our customers. Oil is customarily sold through contracts whereby producers are responsible for transporting produced oil from the
field to a port for shipping, with all costs and risks associated with transportation borne by the producer. Gas, however, is sold at the delivery point of the gas pipeline system near the field and, therefore, the customer bears all transportation
costs and risks associated therewith. Oil and gas transportation in Argentina operates in an open access non-discriminatory environment under which producers have equal and open access to the transportation infrastructure. We maintain
limited storage capacity at each oil site and at the terminals from which oil is shipped. In the past, these capacities have been sufficient to store oil without reducing current production during temporary unavailability of the pipeline systems,
due, for example, to maintenance requirements or temporary emergencies.

As of December 31, 2013, we
owned 18 concessions in oil and gas production areas in Argentina. Our production is concentrated in four basins: the Neuquén, Austral, San Jorge and Noroeste basins. In the Neuquén basinthe most important basin in Argentina in
terms of oil and gas productionwe own approximately 589,000 net acres. Our most important fields in the Neuquén basin are Puesto Hernández (sold on January 31, 2014), 25 de Mayo-Medanito S.E., El Mangrullo and Sierra Chata.
In the Austral basin, we own approximately 1,910,000 net acres, with Santa Cruz I and Santa Cruz II being our main concessions. As of December 31, 2013, we had 3,302 productive wells in Argentina.

For the year 2013, our average daily production was 45,688 barrels of crude oil and 252.6 million cubic feet of
natural gas, representing an increase of 2.1% in our production of oil and a decrease of 8.5% in our production of gas, compared to 2012.

During 2013, according to the SE, oil production in Argentina declined to an average of 559,279 barrels per day, a decrease of 2% compared to 2012. Gas production decreased 5% to 4.0 billion cubic feet
per day. In 2013, our oil production and our gas production accounted for approximately 8% and 6% of total oil production and gas production in Argentina, respectively, and positioned us as the fourth producer of oil and gas in the country.



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In 2013, we carried out investment plans aligned with our reserves
replacement and production goals, as a means to achieve sustainable growth. Our capital expenditures included the drilling of 51 producing wells, repairing 87 producing wells, mainly in the Neuquén basin, and expanding secondary recovery
projects and surface facilities in several areas in which we operate.

Production Outside Argentina

As of December 31, 2013, 14% of our combined proved reserves were located outside Argentina. In addition, as of
December 31, 2013, approximately 12% of our oil production and 7% of our gas production came from outside Argentina. As of that date, we had working interests in five oil and gas production blocks outside Argentina: Oritupano Leona, La
Concepción, Acema and Mata (through direct and indirect equity interests in mixed-ownership companies, including Petroritupano S.A., Petroven-Bras S.A., Petrowayú S.A. and Petrokariña S.A.) in Venezuela, and Colpa Caranda in
Bolivia.

Venezuela

During 2013, oil and gas production attributable to our operations in Venezuela averaged 5,802 barrels of oil equivalent per day, representing 6.0% of our daily production and a decrease of 14.6% compared
to 2012. Our four areas in Venezuela, operated by mixed-ownership companies, had an aggregate of 170 productive wells.

Mixed-ownership companies are required to sell all liquid hydrocarbons and the associated natural gas they produce to Petróleos de Venezuela S.A. (PDVSA) by reference to a price formula
that uses international benchmarks such as the price of WTI crude and the cost of well test services (WTS).

Mixed-ownership companies are subject to royalty payments of 33.33% based on production. In addition, they are required to pay to the Venezuelan government an amount equivalent to any difference between
(1) 50% of the value of oil and gas sales during each calendar year and (2) the sum of total royalty payments made during such year plus income tax and any other tax or duty calculated on the basis of the sales revenues paid during such
year.

In 2008, the Venezuelan government enacted the Law of Special Contribution to Extraordinary
Prices in the International Hydrocarbons Market, introducing a special tax payable by companies exporting or transporting liquid hydrocarbons and oil by-products outside Venezuela, to be applied when the average price of the basket of
Venezuelan liquid hydrocarbons exceeded U.S.$70 per barrel.

In 2011, the special tax payable under the above
mentioned law was replaced with two special contributions, one for extraordinary prices and another for exorbitant prices, to be applied to the difference between the price set forth by the Venezuelan national budget and the
monthly average of international prices of the basket of Venezuelan liquid hydrocarbons. In 2013, the Venezuelan government reformed the Decree No. 8,807/12, introducing modifications and updates the rates of these specials contributions. For the
purposes of the law are considered exorbitant prices those whose monthly average of international prices of the basket of Venezuelan liquid hydrocarbons exceed U.S.$80 per barrel. These special contributions are recorded by mixed-ownership companies
as selling expenses in their financial statements and negatively impact the earnings of such mixed-ownership companies.

Bolivia

In 2013, our net daily production in Bolivia under the economic interest method was 3,474 barrels of oil equivalent, or 3.6% of our total production. Of this amount, 16.2 MMcf/d corresponded to gas
production and 781 barrels of oil per day corresponded to liquid hydrocarbons, including LPG.

As of
December 31, 2013, we held a 100% interest in the Colpa Caranda Block in Bolivia. The Colpa Caranda Block covers approximately 56,000 net acres located in the Sub Andina Central basin and has 63 producing wells. These fields, which originally
exported gas to Argentina, currently deliver gas primarily to the Santa Cruz-São Paulo pipeline that transports gas to Brazil.

As of December 31, 2008, estimated proved oil and gas reserves attributable to our operations in Bolivia amounted to 23 MMboe. However, on January 25, 2009, Bolivia adopted a new constitution
that prohibits private ownership of the countrys oil and gas resources. In light of the new constitution, we were required to write off all of our proved reserves in Bolivia at the end of 2009.

We have operated the Colpa Caranda Block in Bolivia since 1989. Under a contract signed in October 2006 with the Bolivian
national oil company, Yacimientos Petroliferos Fiscales Bolivianos (YPFB), we currently perform exploration and production activities at our own risk and for our own account in the Colpa Caranda Block, but on behalf and in the name of
YPFB. The agreement was approved on April 23, 2007 and became effective on May 2, 2007. Under this agreement, YPFB owns the hydrocarbons and pays royalties, direct interest and direct tax on hydrocarbons, which in the aggregate amount to
50% of the production valued on the basis of sales prices net of transport costs charged for use of pipelines from the Colpa fields to Brazil. Of the remaining amounts, 80% is used to pay for operating services provided by us, including
depreciation. The balance is shared between YPFB and us on the basis of an index calculated based on production volumes, depreciation rates, prices and taxes paid, among other items.



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Ecuador

On October 31, 2008, EcuadorTLC S.A., Teikoku Oil Ecuador and Petroecuador, among others, executed a series of
amendatory agreements regulating the operation of Block 18 and Palo Azul Unified Field (the Amendatory Agreements), while the parties negotiated the migration to a new contract modality.

On July 26, 2010, the Hydrocarbon Law in force in Ecuador was amended to provide for, among other things, the
obligation to migrate to a new contract modality before November 24, 2010.

The Company decided not to
accept the final proposal received from the Ecuadorian government to migrate from the original arrangements to service agreements in Block 18 and the Palo Azul Unified Field. Consequently, through a Resolution dated November 25, 2010, the
Hydrocarbon Secretary notified EcuadorTLC S.A. of the termination of the participation agreements and instructed Petroamazonas EP to undertake the operational transition process. Until November 25, 2010, our oil production in Ecuador averaged
2,300 barrels per day, accounting for 2.3% of our total average daily production in barrels of oil equivalent.

Section 9 of the Amendatory Agreements provides that the Ecuadorian government must compensate the terminated
parties in an amount equivalent to unamortized investments adjusted by reference to a variable rate, and provides for a period of time for the Ecuadorian government and the terminated parties to work out the details of the termination payment.

On March 18, 2011, the Hydrocarbon Secretary issued Official Notice No. 626 to inform the Company
that it was analyzing and structuring a new regulatory framework to determine a settlement price for the termination, to be applied instead of the provisions of the Amendatory Agreements. On April 11, 2011, the Company filed an answer to
Official Notice No. 626 rejecting the terms thereof and claiming that the same did not comply with the conditions set forth in the Amendatory Agreements. In this respect, the Company informed the Hydrocarbon Secretary that it would continue to
seek compliance with the terms of the Amendatory Agreements.

In the absence of further action by the
Ecuadorian government, on December 9, 2011, PESA served a notice on the Ecuadorian government informing it of the existence of a dispute under the terms of the Treaty for the Promotion and Reciprocal Protection of Investments previously entered
into between Argentina and Ecuador. Under the treaty, this implies the opening of a negotiation period prior to possible arbitration to seek enforcement of the provisions of the Amendatory Agreements.

On June 21, 2013, not having reached an agreement with the Ecuadorian government, EcuadorTLC SA, Cayman
International Exploration Company and Teikoku Oil Ecuador, members of the Consortium, submitted to the Ecuadorian State a letter of notification of a dispute under the terms of the Amendatory Agreements, stating their decision to submit the dispute
to international arbitration under the arbitration Rules of the United Nations Commission on International Trade Law.

At December 31, 2013 we recorded Ps. 347 million to be recovered from the Ecuadorian State in accordance with the provisions of the Amendatory Agreements, excluding any interest accrued, as we
believe that it is not possible to determine with certainty the interest rate to be applied.

As of the date
of this Annual Report, the Company has taken all the necessary procedural steps to preserve its rights to receive from the Ecuadorian government the compensation provided for in the Amendatory Agreements.

Ship or Pay Obligations with OCP

We continue to maintain a presence in Ecuador through our associate Oleoducto de Crudos Pesados S.A. (OCP).

Starting November 10, 2003, the Company entered into a Ship or Pay agreement with OCP, whereby it
secured an oil transportation capacity of 80,000 barrels per day for a 15-year term.

Under this agreement,
the Company must comply with its contractual obligations for the aggregate committed capacity, regardless of the amount of crude oil actually transported, and pay a rate that covers OCPs operating costs and financial services, among other
items.

While the Amendatory Agreements remained in force, transportation capacity costs invoiced by OCP were
charged on a monthly basis. Costs related to the crude oil volume actually transported were charged to Administrative and selling expenses, while the portion of costs related to the unused committed transportation capacity was shown
under Other operating expenses.

The Company is entitled to sell transportation capacity through
OCPs pipeline to mitigate the negative effect of excess contracted capacity. In this respect, the Company periodically negotiates the sale of committed transportation capacity. On December 31, 2008, the Company and Petroecuador entered
into an agreement under which, as from January 1, 2009, transportation of crude oil through OCPs pipeline will be charged by Petroecuador to the transportation capacity committed



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to under the agreement entered into between the Company and OCP, up to a maximum of 70,000 barrels per day. In addition, the Company sold transportation capacity for approximately 8,000 oil
barrels per day to third parties for the July 2004-January 2012 period. In October 2008, 40% of the net contractual commitment was assumed by Teikoku Oil Ecuador, as consideration for the assignment to the Company of a 40% interest in Block 18 and
Palo Azul.

Upon termination of the operations in Block 18, EcuadorTLC recognized liabilities amounting to Ps
342 million as of December 31, 2010 for contract termination costs that will continue to be incurred under the Ship or Pay contract with OCP for the expected loss on the net committed transportation capacity. As of December 31, 2013,
related current and non-current liabilities amounted to Ps. 92 million and Ps. 288 million, respectively. The obligations associated with the Ship or Pay contract expire in 2018.

OCP holds interpretative divergences with the Ecuadorian tax authorities. During 2013 several inconsistent court rulings
were issued. As of the date this Annual Report, OCPs management is analyzing the administrative or judicial remedies available. We estimate that the outcome of these differences with the Ecuadorian tax authorities will not have a significant
adverse effect on our financial position.

Statistical Information Relating to Oil and Gas Production

The following table sets forth our oil and gas production during 2013. Production figures represent our working interest
in production (and are therefore net to us). In addition, the table includes our working interest in each field, the number of producing wells and the expiration date of the concessions, in each case as of December 31, 2013. Although some of
these concessions may be extended at their expiration, the expiration dates set forth below do not include any extensions.



|                           |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 
|-------------------------- |  | ---------------------- |  | --------------- |  | ------- | --------------- |  | ------- |  | ------ | ------------------ |  |  | ------ | -------- |  |  | ---------- |  |  |  | ------ | ---- |  |  | --------- | 
|                           |  |                        |  | 2013 Production |  |         | Oil andGasWells |  |         |  |       
|Production Areas           |  | Location               |  | Basin           |  | Oil (1) |                 |  | Gas (2) |  |        | OilEquivalent 
(3) |  |  |        | Interest |  |  | Expiration | 
|Argentina:                 |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 
|25 de Mayo  Medanito S.E. |  | La Pampa and Río Negro |  | Neuquén         |  |         | 3,302           |  |         |  | 2,950  |                    |  |  | 3,794  |          |  |  | 644        |  |  |  | 100.00 | %    |  |  | 2016      | 
|El Mangrullo               |  | Neuquén                |  | Neuquén         |  |         | 42              |  |         |  | 19,686 |                    |  |  | 3,323  |          |  |  | 21         |  |  |  | 100.00 | %    |  |  | 2025      | 
|Jagüel de los Machos       |  | Río Negro and La Pampa |  | Neuquén         |  |         | 2,847           |  |         |  | 4,138  |                    |  |  | 3,537  |          |  |  | 216        |  |  |  | 100.00 | %    |  |  | 2015      | 
|Puesto Hernández (7)       |  | Mendoza and Neuquén    |  | Neuquén         |  |         | 1,486           |  |         |  |       |                    |  |  | 1,486  |          |  |  | 671        |  |  |  | 38.45  | %    |  |  | 2016      | 
|Bajada del Palo            |  | Neuquén                |  | Neuquén         |  |         | 1,145           |  |         |  | 1,874  |                    |  |  | 1,457  |          |  |  | 89         |  |  |  | 46.92  | %    |  |  | 2025      | 
|Santa Cruz II              |  | Santa Cruz             |  | Austral         |  |         | 364             |  |         |  | 2,102  |                    |  |  | 714    |          |  |  | 59         |  |  |  | 100.00 | %    |  |  | 2017/2028 | 
|Río Neuquén                |  | Río Negro and Neuquén  |  | Neuquén         |  |         | 343             |  |         |  | 11,499 |                    |  |  | 2,260  |          |  |  | 127        |  |  |  | 100.00 | %    |  |  | 2017/2027 | 
|Entre Lomas                |  | Río Negro and Neuquén  |  | Neuquén         |  |         | 2,695           |  |         |  | 3,802  |                    |  |  | 3,329  |          |  |  | 497        |  |  |  | 46.92  | %    |  |  | 2016/2026 | 
|Aguada de la Arena         |  | Neuquén                |  | Neuquén         |  |         | 49              |  |         |  | 6,132  |                    |  |  | 1,071  |          |  |  | 14         |  |  |  | 80.00  | %    |  |  | 2036      | 
|Santa Cruz I               |  | Santa Cruz             |  | Austral         |  |         | 1,051           |  |         |  | 24,469 |                    |  |  | 5,129  |          |  |  | 102        |  |  |  | 71.00  | %    |  |  | 2017/2035 | 
|Sierra Chata               |  | Neuquén                |  | Neuquén         |  |         | 49              |  |         |  | 8,734  |                    |  |  | 1,505  |          |  |  | 63         |  |  |  | 45.55  | %    |  |  | 2023      | 
|Atuel Norte                |  | Mendoza                |  | Neuquén         |  |         | 3               |  |         |  |       |                    |  |  | 3      |          |  |  | 6          |  |  |  | 33.33  | %(6) |  |  | 2015      | 
|La Tapera  Puesto Quiroga |  | Chubut                 |  | San Jorge       |  |         | 51              |  |         |  |       |                    |  |  | 51     |          |  |  | 9          |  |  |  | 35.67  | %(6) |  |  | 2027      | 
|El Tordillo                |  | Chubut                 |  | San Jorge       |  |         | 2,124           |  |         |  |       |                    |  |  | 2,124  |          |  |  | 663        |  |  |  | 35.67  | %(6) |  |  | 2027      | 
|Aguaragüe                  |  | Salta                  |  | Noroeste        |  |         | 81              |  |         |  | 3,240  |                    |  |  | 621    |          |  |  | 34         |  |  |  | 15.00  | %(6) |  |  | 2023/2027 | 
|Estancia Agua Fresca       |  | Santa Cruz             |  | Austral         |  |         | 607             |  |         |  | 2,281  |                    |  |  | 987    |          |  |  | 24         |  |  |  | 50.00  | %    |  |  | 2034      | 
|Gobernador Ayala           |  | Mendoza                |  | Neuquén         |  |         | 147             |  |         |  |       |                    |  |  | 147    |          |  |  | 37         |  |  |  | 22.51  | %(6) |  |  | 2036      | 
|Charco del Palenque        |  | Río Negro              |  | Neuquén         |  |         | 290             |  |         |  | 1,305  |                    |  |  | 508    |          |  |  | 26         |  |  |  | 46.92  | %    |  |  | 2038      | 
|                           |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 
|Total Argentina            |  |                        |  |                 |  |         | 16,676          |  |         |  | 92,212 |                    |  |  | 32,046 |          |  |  | 3,302      |  |  |  |        |      |  |  |           | 
|                           |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 
|Outside Argentina:         |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 
|Colpa Caranda(4)           |  | Bolivia                |  | Sub Andina      |  |         | 285             |  |         |  | 5,898  |                    |  |  | 1,268  |          |  |  | 63         |  |  |  | 100.00 | %    |  |  | 2029      | 
|Oritupano Leona(5)         |  | Venezuela              |  | Oriental        |  |         | 1,054           |  |         |  |       |                    |  |  | 1,054  |          |  |  | 85         |  |  |  | 22.00  | %(6) |  |  | 2025      | 
|Acema(5)                   |  | Venezuela              |  | Oriental        |  |         | 61              |  |         |  |       |                    |  |  | 61     |          |  |  | 16         |  |  |  | 34.49  | %(6) |  |  | 2025      | 
|La Concepción(5)           |  | Venezuela              |  | Lago Maracaibo  |  |         | 754             |  |         |  | 619    |                    |  |  | 857    |          |  |  | 57         |  |  |  | 36.00  | %(6) |  |  | 2025      | 
|Mata(5)                    |  | Venezuela              |  | Oriental        |  |         | 145             |  |         |  |       |                    |  |  | 145    |          |  |  | 12         |  |  |  | 34.49  | %(6) |  |  | 2025      | 
|                           |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 
|Total Outside Argentina    |  |                        |  |                 |  |         | 2,299           |  |         |  | 6,517  |                    |  |  | 3,385  |          |  |  | 233        |  |  |  |        |      |  |  |           | 
|                           |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 
|Total                      |  |                        |  |                 |  |         | 18,975          |  |         |  | 98,729 |                    |  |  | 35,431 |          |  |  | 3,535      |  |  |  |        |      |  |  |           | 
|                           |  |                        |  |                 |  |         |                 |  |         |  |        |                    |  |  |        |          |  |  |            |  |  |  |        |      |  |  |           | 



|(1) | In thousands of barrels.
|--- | ------------------------

|(2) | In millions of cubic feet.
|--- | --------------------------

|(3) | In thousands of barrels of oil equivalent. Gas is converted to oil equivalent using a factor of 6,000 cubic feet of gas per barrel of oil
equivalent.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------

|(4) | Production from Colpa Caranda block was calculated using the economic interest method.
|--- | --------------------------------------------------------------------------------------

|(5) | Indirect interests through mixed-ownership companies.
|--- | -----------------------------------------------------

|(6) | Areas operated by third parties.
|--- | --------------------------------

|(7) | Sold on January 31, 2014.
|--- | -------------------------



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The following table sets forth our average daily production of oil,
including other liquid hydrocarbons, for the fiscal years ended December 31, 2013, 2012 and 2011. This table includes our net share of production of subsidiaries, companies under joint control and unconsolidated investees.



|                      |  |                           |        |  |      |  |        |      |  |  |        | 
|--------------------- |  | ------------------------- | ------ |  | ---- |  | ------ | ---- |  |  | ------ | 
|                      |  | Year ended December 31,   |       
|                      |  | 2013                      |        |  | 2012 |  |        | 2011 | 
|                      |  | (average barrels per day) |       
|Argentina             |  |                           | 45,688 |  |      |  | 44,769 |      |  |  | 39,863 | 
|Venezuela             |  |                           | 5,518  |  |      |  | 6,387  |      |  |  | 7,756  | 
|Rest of Latin America |  |                           | 781    |  |      |  | 885    |      |  |  | 946    | 
|                      |  |                           |        |  |      |  |        |      |  |  |        | 
|Total                 |  |                           | 51,987 |  |      |  | 52,040 |      |  |  | 48,565 | 
|                      |  |                           |        |  |      |  |        |      |  |  |        | 

The following table sets forth our average daily gas production for the fiscal years
ended December 31, 2013, 2012 and 2011. This table includes our net share of production of subsidiaries, companies under joint control and unconsolidated investees.



|                      |  |                                           |         |  |      |  |         |      |  |  |         | 
|--------------------- |  | ----------------------------------------- | ------- |  | ---- |  | ------- | ---- |  |  | ------- | 
|                      |  | Year ended December 31,                   |        
|                      |  | 2013                                      |         |  | 2012 |  |         | 2011 | 
|                      |  | (average thousands of cubic feet per day) |        
|Argentina             |  |                                           | 252,636 |  |      |  | 276,191 |      |  |  | 275,786 | 
|Venezuela             |  |                                           | 1,696   |  |      |  | 2,420   |      |  |  | 3,534   | 
|Rest of Latin America |  |                                           | 16,159  |  |      |  | 18,605  |      |  |  | 21,906  | 
|                      |  |                                           |         |  |      |  |         |      |  |  |         | 
|Total                 |  |                                           | 270,491 |  |      |  | 297,216 |      |  |  | 301,226 | 
|                      |  |                                           |         |  |      |  |         |      |  |  |         | 

The following table sets forth the average sales price per barrel of oil and per million
cubic feet of gas for each geographic area for the fiscal years ended December 31, 2013, 2012 and 2011, of our subsidiaries, joint operations and associates.



|                                       |  |                         |       |  |      |  |       |      |  |  |       | 
|-------------------------------------- |  | ----------------------- | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                                       |  | Year ended December 31, |      
|                                       |  | 2013                    |       |  | 2012 |  |       | 2011 | 
|Argentina:                             |  |                         |       |  |      |  |       |      |  |  |       | 
|Oil (in pesos per barrel of oil)       |  |                         | 399.0 |  |      |  | 320.5 |      |  |  | 240.1 | 
|Gas (in pesos per thousand cubic feet) |  |                         | 12.6  |  |      |  | 8.8   |      |  |  | 7.3   | 
|                                       |  |                         |      
|Venezuela(1):                          |  |                         |       |  |      |  |       |      |  |  |       | 
|Oil (in pesos per barrel of oil)       |  |                         | 610.3 |  |      |  | 408.3 |      |  |  | 369.2 | 
|                                       |  |                         |      
|Rest of Latin America(2):              |  |                         |       |  |      |  |       |      |  |  |       | 
|Oil (in pesos per barrel of oil)       |  |                         | 157.2 |  |      |  | 90.4  |      |  |  | 79.7  | 
|Gas (in pesos per thousand cubic feet) |  |                         | 44.9  |  |      |  | 37.4  |      |  |  | 30.6  | 



| | (1) | Figures are translated into Argentine pesos at historic exchange rates, using an annual average exchange rate.
| | --- | --------------------------------------------------------------------------------------------------------------

| | (2) | Figures are translated into Argentine pesos at historic exchange rates, using a monthly average exchange rate.
| | --- | --------------------------------------------------------------------------------------------------------------



30



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##### Table of Contents

The following table sets forth our average operating cost, royalties and
depreciation cost of oil and gas fields in each geographic area for the fiscal years ended December 31, 2013, 2012 and 2011. This table includes our net share of production of our subsidiaries, joint operations and associates.



|                          |  |                                         |        |  |      |  |        |      |  |  |        | 
|------------------------- |  | --------------------------------------- | ------ |  | ---- |  | ------ | ---- |  |  | ------ | 
|                          |  | Year ended December 31,                 |       
|                          |  | 2013                                    |        |  | 2012 |  |        | 2011 | 
|                          |  | (in pesos per barrel of oil equivalent) |       
|Argentina:                |  |                                         |        |  |      |  |        |      |  |  |        | 
|Operating cost            |  |                                         | 80.82  |  |      |  | 60.08  |      |  |  | 43.57  | 
|Royalties                 |  |                                         | 34.27  |  |      |  | 24.85  |      |  |  | 18.45  | 
|Depreciation              |  |                                         | 58.73  |  |      |  | 45.12  |      |  |  | 31.91  | 
|                          |  |                                         |        |  |      |  |        |      |  |  |        | 
|Total                     |  |                                         | 173.82 |  |      |  | 130.05 |      |  |  | 93.93  | 
|                          |  |                                         |       
|Venezuela(1):             |  |                                         |        |  |      |  |        |      |  |  |        | 
|Operating cost            |  |                                         | 172.85 |  |      |  | 103.74 |      |  |  | 60.16  | 
|Royalties                 |  |                                         | 127.61 |  |      |  | 102.19 |      |  |  | 92.71  | 
|Depreciation              |  |                                         | 64.49  |  |      |  | 46.38  |      |  |  | 39.18  | 
|                          |  |                                         |        |  |      |  |        |      |  |  |        | 
|Total                     |  |                                         | 364.95 |  |      |  | 252.31 |      |  |  | 192.05 | 
|                          |  |                                         |       
|Rest of Latin America(2): |  |                                         |        |  |      |  |        |      |  |  |        | 
|Operating cost            |  |                                         | 34.62  |  |      |  | 27.44  |      |  |  | 21.57  | 
|Royalties                 |  |                                         |       |  |      |  |       |      |  |  |       | 
|Depreciation              |  |                                         | 17.90  |  |      |  | 15.46  |      |  |  | 11.62  | 
|                          |  |                                         |        |  |      |  |        |      |  |  |        | 
|Total                     |  |                                         | 52.52  |  |      |  | 42.91  |      |  |  | 33.19  | 
|                          |  |                                         |        |  |      |  |        |      |  |  |        | 



| | (1) | Figures are translated into Argentine pesos at historic exchange rates, using an annual average exchange rate.
| | --- | --------------------------------------------------------------------------------------------------------------

| | (2) | Figures are translated into Argentine pesos at historic exchange rates, using a monthly average exchange rate.
| | --- | --------------------------------------------------------------------------------------------------------------



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##### Table of Contents

Exploration

Our strategy is focused on constantly searching for new exploration opportunities aligned with our growth targets. In Argentina, we own substantial acreage containing undeveloped reservoirs of
non-conventional energy sources, including both shale oil and shale gas in the Neuquén basin, and shale oil in the Austral basin. In the coming years, we expect to focus on these areas as well as conventional reservoirs that are located close
to infrastructure.

The following table lists our exploration areas in Argentina as of December 31, 2013,
the location and basin of each area, our net working interest and the expiration date for the exploration authorization.



|                                    |  |                   |  |                    |  |          |        |      |            |  |      |  
|----------------------------------- |  | ----------------- |  | ------------------ |  | -------- | ------ | ---- | ---------- |  | ---- | -
|                                    |  | Location          |  | Basin              |  | Interest |        |      | Expiration | 
|Argentina:                          |  |                   |  |                    |  |          |        |      |            |  |      |  
|Glencross                           |  | Santa Cruz        |  | Austral            |  |          | 87.00  | %    |            |  | 2033 |  
|Estancia Chiripá                    |  | Santa Cruz        |  | Austral            |  |          | 87.00  | %    |            |  | 2033 |  
|Agua Amarga                         |  | Río Negro         |  | Neuquén            |  |          | 46.92  | %    |            |  | 2016 |  
|Parva Negra                         |  | Neuquén           |  | Neuquén            |  |          | 85.00  | %    |            |  | 2018 |  
|Cerro Hamaca Norte                  |  | Mendoza           |  | Neuquén            |  |          | 39.64  | %(2) |            |  | (1   | )
|Puesto Oliverio                     |  | Santa Cruz        |  | Austral            |  |          | 50.00  | %    |            |  | 2037 |  
|El Campamento                       |  | Santa Cruz        |  | Austral            |  |          | 50.00  | %    |            |  | 2037 |  
|El Cerrito Oeste                    |  | Santa Cruz        |  | Austral            |  |          | 50.00  | %    |            |  | 2037 |  
|Chirete                             |  | Salta             |  | Noroeste           |  |          | 100.00 | %    |            |  | 2014 |  
|Enarsa 1                            |  | Continental Shelf |  | Offshore Argentina |  |          | 25.00  | %(2) |            |  | 2020 |  
|Enarsa 3                            |  | Continental Shelf |  | Offshore Argentina |  |          | 35.00  | %    |            |  | 2020 |  
|Río Atuel                           |  | Mendoza           |  | Neuquén            |  |          | 33.33  | %(2) |            |  | 2015 |  
|Borde del Limay                     |  | Neuquén           |  | Neuquén            |  |          | 85.00  | %    |            |  | 2015 |  
|Los Vértices                        |  | Neuquén           |  | Neuquén            |  |          | 85.00  | %    |            |  | 2015 |  
|Veta Escondida and Rincón de Aranda |  | Neuquén           |  | Neuquén            |  |          | 55.00  | %    |            |  | 2027 |  



| | (1) | We have filed an application for a production concession with respect to this field, which is pending approval as of the date of this Annual Report.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------

| | (2) | Areas operated by third parties.
| | --- | --------------------------------

Exploration in Argentina

As of December 31,
2013, we held interests in approximately 16,431,000 gross exploration acres in Argentina, of which approximately 1,482,000 were located in shale oil/shale gas areas.

In 2013, we drilled 5 onshore wells: three in the Neuquén Basin, two of which Mangrullo x-1015 and Rincón
de Aranda x-1001 were productive. We finished drilling the third well, Sierra Chata x-97, in November and the well is still to be completed, fractured and tested. The two remaining wells drilled in 2013 are located in the Austral Basin. The Puesto
Oliverio x-1003 was a discovery well, and Estancia Campos a-2 remains to be completed and fractured.

In
October 2013 we announced the discovery of a new natural gas productive accumulation in the area of the El Mangrullo exploitation concession, in the Province of Neuquén. The discovery was confirmed after the drilling of the exploratory well
Mangrullo x-1015, which reached a depth of 1.300 meters, and was stimulated by the hydraulic fracturing of the low permeability formation called Agrio.

In December of 2013, we announced a second discovery, a new field in the Rincón de Aranda Concession, also in the Province of Neuquén. This is our first discovery of non-conventional
hydrocarbons in the Vaca Muerta Formation.

We also initiated early production as a result of the oil and gas
discovery in the area of the Puesto Peter concession in the Province of Santa Cruz, and commenced delimitation.

New
Area for the Exploration of Non Conventionals

On December 6, 2013, we acquired an 85%
participation in a joint operation (UTE) agreement in association with GyP, who has the remaining 15%, for the exploration and potential exploitation of the area of Parva Negra Este, located in the Neuquén Basin.



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##### Table of Contents

The exploration permit is valid for four years plus a one-year extension
with the right to request the exploitation concession for 25 years, which can also be extended for an additional 10 years. This agreement was approved by the Executive Branch of the province of Neuquén through Decree No. 575/14, published on
April 4, 2014. We have the commitment to drill four onshore wells in the next two years, with an insurance amount U.S.$27 million for the first year.

We own concessions in the Neuquén basin with both shale oil and shale gas potential, and in the Austral basin with shale oil potential. The development of non-conventional resources will demand
major capital investments. See Item 5. Operating and Financial Review and ProspectsFuture Capital RequirementsOil and Gas exploration and Production.



33



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##### Table of Contents

Reserves

We believe our estimates of remaining proved recoverable oil and gas reserve volumes to be reasonable. Pursuant to Rule 4-10 of Regulation S-X, promulgated by the SEC, proved oil and natural gas
reserves are those estimated quantities of crude oil, natural gas and natural gas liquids that geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs, under existing economic and
operating conditions, i.e., prices and cost at the date of estimation. DeGolyer and MacNaughton performed an independent evaluation of our reserves on approximately 73% of our estimated reserves as of December 31, 2013. The reserves not
evaluated by DeGolyer and MacNaughton are in areas where we do not act as operator. The evaluation covered 100% of the estimated reserves located in areas operated by us. DeGolyer and MacNaughton evaluated the proved oil and natural gas reserve
estimates in accordance with Rule 4-10 of Regulation S-X and in accordance with the oil and gas reserves disclosure provisions of ASC Topic 932. We provided all information required during the course of the evaluation process to DeGolyer and
MacNaughtons satisfaction. See the reserves evaluation report by DeGolyer and MacNaughton, dated January 15, 2014, included as Exhibit 5.1 to this Annual Report.

As of December 31, 2013, 2012 and 2011, 73%, 76% and 73%, respectively, of our estimated reserves were evaluated by
DeGolyer and MacNaughton.

Internal Control over Proved Reserves

The reserves estimation process begins with an initial evaluation of our assets by geophysicists, geologists and
engineers. A Reserves Coordinator (Coordinador de Reservas, or RC) safeguards the integrity and objectivity of our reserves estimates by supervising and providing technical support to technical teams who are responsible for
preparing the reserves estimates. Our technical teams have degrees in geophysics, geology, petroleum engineering and accounting, and are trained internally in reserves estimates seminars. The RC is responsible for consolidating and auditing the
reserves estimation process in compliance with the SEC reserves guidelines. The technical officer primarily responsible for overseeing the preparation of our reserves is a member of the Society of Petroleum Engineers (the SPE), with 23
years of experience in exploration and production activities, and has been with PESA for 23 years. Our reserves estimates are approved by the Oil and Gas Exploration and Production Director and submitted to our Executive Committee.

Most of the reserves estimates related to areas in which we do not act as operator were prepared by the
operators and subsequently reviewed by our petroleum engineers before making the assessment of our proved reserves. The reported hydrocarbon reserves were estimated based on professional, geological and engineering judgment and on information
supplied by us prior to January 28, 2014. Thus they are subject to revisions, upward or downward, as a result of future operations or as additional information becomes available. The estimation of reserves is imprecise due to many unknown
geologic and reservoir factors that can only be estimated through sampling techniques. Since reserves are therefore only estimates, they cannot be appraised for the purpose of verifying exactness.

As of December 31, 2013, our liquid hydrocarbon and natural gas proved developed and undeveloped reserves totalled
205.1 MMboe (82.3 MMboe of liquid hydrocarbons and 736.8 billion cubic feet, or 122.8 MMboe, of natural gas), representing a 4.7% decline compared to proved reserves as of December 31, 2012 (a decline of 7.3% and 2.9% for liquid hydrocarbons
and natural gas, respectively). During 2013, our fields located in Argentina accounted for revisions of previous estimates amounting to 11 MMboe. In addition, a downward revision of 1.8 MMboe was attributable to a greater-than-expected decline in
our reserves held through mixed-ownership companies in Venezuela.

Liquid hydrocarbons and natural gas
accounted for 40% and 60%, respectively, of our total proved reserves as of December 31, 2013. Approximately 14% of our total proved reserves as of such date were located outside Argentina.

As of December 31, 2013, proved developed reserves of crude oil equivalent represented 54.7% of our total proved
reserves of crude oil equivalent.

As of December 31, 2013, we had proved reserves equal to six years of
production at 2013 volumes.



34



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##### Table of Contents

The following table sets forth our estimated net proved developed and
undeveloped reserves of crude oil and natural gas by country as of December 31, 2013, including our subsidiaries, joint operations and associates.



|                                                  |  |                                 |    |  |                  |  |     |                          |  |  |     | 
|------------------------------------------------- |  | ------------------------------- | -- |  | ---------------- |  | --- | ------------------------ |  |  | --- | 
|                                                  |  | Reserves as ofDecember 31,
2013 |   
|Reserves category                                 |  | Oil(mmbbl)                      |    |  | Naturalgas(bncf) |  |     | OilEquivalent(mmboe) (1) | 
|PROVED                                            |  |                                 |    |  |                  |  |     |                          |  |  |     | 
|Developed                                         |  |                                 | 56 |  |                  |  | 336 |                          |  |  | 112 | 
|Argentina                                         |  |                                 | 44 |  |                  |  | 321 |                          |  |  | 98  | 
|Venezuela                                         |  |                                 | 12 |  |                  |  | 15  |                          |  |  | 15  | 
|                                                  |  |                                 |   
|PROVED                                            |  |                                 |    |  |                  |  |     |                          |  |  |     | 
|Undeveloped                                       |  |                                 | 26 |  |                  |  | 402 |                          |  |  | 93  | 
|Argentina                                         |  |                                 | 17 |  |                  |  | 375 |                          |  |  | 80  | 
|Venezuela                                         |  |                                 | 9  |  |                  |  | 27  |                          |  |  | 14  | 
|                                                  |  |                                 |    |  |                  |  |     |                          |  |  |     | 
|Total proved reserves (developed and undeveloped) |  |                                 | 82 |  |                  |  | 738 |                          |  |  | 205 | 
|                                                  |  |                                 |    |  |                  |  |     |                          |  |  |     | 



| | (1) | Gas is converted to oil equivalent using a factor of 6,000 cubic feet of gas per barrel of oil equivalent.
| | --- | ----------------------------------------------------------------------------------------------------------

Reserves calculations are based on forecasts of field production, which depend on a number of technical parameters, such
as seismic interpretation, geological maps, well tests, reservoir engineering studies and economic data. All reserves estimates involve some degree of uncertainty. The relative degree of uncertainty depends primarily on the amount of reliable
geological and engineering data available at the time of the estimate and the interpretation of those data. Our estimates are thus made using the most reliable data at the time of the estimate, in accordance with the best practices in the oil and
gas industry.

The statements contained in this Item 4 regarding exploration and development projects and
production estimates are forward-looking and subject to significant risks and uncertainties. Although we believe that these expectations reflected in these forward-looking statements are reasonable, we cannot guarantee that our actual levels of
activity, production or performance will meet these expectations. See Item 3. Key InformationRisk Factors.



35



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##### Table of Contents

The table below sets forth, by geographic area, our total proved reserves
and proved developed reserves of crude oil, condensate and natural gas liquids, and reserves of natural gas, at the indicated dates. This table includes our net share of the proved reserves of our subsidiaries, joint operations and associates. Our
net share of the proved reserves of our unconsolidated investees represented 14% of our total proved reserves as of December 31, 2013.



|                                                                        |  |                                              |         |   |                             |  |        |                                             |  |  |           |   |  |           |          |   |       |  |        |          |  |  |          |   |  |  |       |  
|----------------------------------------------------------------------- |  | -------------------------------------------- | ------- | - | --------------------------- |  | ------ | ------------------------------------------- |  |  | --------- | - |  | --------- | -------- | - | ----- |  | ------ | -------- |  |  | -------- | - |  |  | ----- | -
|                                                                        |  | Crude oil, condensate and natural gasliquids |         |   | Natural gas                 |  |        |                                             | 
|                                                                        |  | Argentina                                    |         |   | Venezuela                   |  |        | Total                                       |  |  | Argentina |   |  | Venezuela |          |   | Total |  |        | Combined | 
|                                                                        |  | (in thousands of barrels)                    |         |   | (in millions of cubic feet) |  |        | (in
millionsof barrels ofoilequivalent) (1) | 
|Total proved developed and undeveloped reserves as of December 31, 2011 |  |                                              | 62,696  |   |                             |  | 29,537 |                                             |  |  | 92,233    |   |  |           | 741,079  |   |       |  | 43,452 |          |  |  | 784,531  |   |  |  | 223   |  
|Proved developed reserves as of December 31, 2011                       |  |                                              | 44,782  |   |                             |  | 17,484 |                                             |  |  | 62,266    |   |  |           | 358,027  |   |       |  | 20,179 |          |  |  | 378,206  |   |  |  | 125.3 |  
|Increase (decrease) originated in:                                      |  |                                              |         |   |                             |  |        |                                             |  |  |           |   |  |           |          |   |       |  |        |          |  |  |          |   |  |  |       |  
|Revisions of previous estimates                                         |  |                                              | (2,626  | ) |                             |  | (3,800 | )                                           |  |  | (6,426    | ) |  |           | 22,120   |   |       |  | (4,913 | )        |  |  | 17,207   |   |  |  | (3.6  | )
|Extensions and discoveries                                              |  |                                              | 4,665   |   |                             |  | 1,130  |                                             |  |  | 5,796     |   |  |           | 15,058   |   |       |  | 8,802  |          |  |  | 23,860   |   |  |  | 9.8   |  
|Purchase of proved reserves in place                                    |  |                                              | 15,895  |   |                             |  |       |                                             |  |  | 15,895    |   |  |           | 35,295   |   |       |  |       |          |  |  | 35,295   |   |  |  | 21.8  |  
|Years production                                                       |  |                                              | (16,385 | ) |                             |  | (2,337 | )                                           |  |  | (18,722   | ) |  |           | (101,086 | ) |       |  | (886   | )        |  |  | (101,972 | ) |  |  | (35.7 | )
|Total proved developed and undeveloped reserves as of December 31, 2012 |  |                                              | 64,245  |   |                             |  | 24,530 |                                             |  |  | 88,775    |   |  |           | 712,466  |   |       |  | 46,455 |          |  |  | 758,921  |   |  |  | 215.3 |  
|Proved developed reserves as of December 31, 2012                       |  |                                              | 48,936  |   |                             |  | 12,670 |                                             |  |  | 61,606    |   |  |           | 358,319  |   |       |  | 14,582 |          |  |  | 372,901  |   |  |  | 123.8 |  
|Increase (decrease) originated in:                                      |  |                                              |         |   |                             |  |        |                                             |  |  |           |   |  |           |          |   |       |  |        |          |  |  |          |   |  |  |       |  
|Revisions of previous estimates                                         |  |                                              | 67      |   |                             |  | (1,085 | )                                           |  |  | (1,018    | ) |  |           | 65,774   |   |       |  | (4,363 | )        |  |  | 61,411   |   |  |  | 9.3   |  
|Extensions and discoveries                                              |  |                                              |        |   |                             |  |       |                                             |  |  |          |   |  |           |         |   |       |  |       |          |  |  |         |   |  |  |      |  
|Purchase of proved reserves in place                                    |  |                                              | 13,204  |   |                             |  |       |                                             |  |  | 13,204    |   |  |           | 9,260    |   |       |  |       |          |  |  | 9,260    |   |  |  | 14.7  |  
|Years production                                                       |  |                                              | (16,675 | ) |                             |  | (2,021 | )                                           |  |  | (18,696   | ) |  |           | (92,213  | ) |       |  | (619   | )        |  |  | (92,832  | ) |  |  | (34.2 | )
|Total proved developed and undeveloped reserves as of December 31, 2013 |  |                                              | 60,841  |   |                             |  | 21,424 |                                             |  |  | 82,265    |   |  |           | 695,287  |   |       |  | 41,473 |          |  |  | 736,760  |   |  |  | 205.1 |  
|Proved developed reserves as of December 31, 2013                       |  |                                              | 43,802  |   |                             |  | 12,448 |                                             |  |  | 56,250    |   |  |           | 320,642  |   |       |  | 14,848 |          |  |  | 335,510  |   |  |  | 112.2 |  



|(1) | Gas is converted to oil equivalent using a factor of 6,000 cubic feet of gas per barrel of oil equivalent.
|--- | ----------------------------------------------------------------------------------------------------------

The following table sets forth the breakdown of our total proved reserves of liquid hydrocarbons and natural gas into
proved developed and proved undeveloped reserves as of December 31, 2013, 2012 and 2011.



|                            |  |                                     |       |  |                          |  |        |                                     |  |  |                          |  |  |                                     |        |  |                          |  |       |  |  |  |        | 
|--------------------------- |  | ----------------------------------- | ----- |  | ------------------------ |  | ------ | ----------------------------------- |  |  | ------------------------ |  |  | ----------------------------------- | ------ |  | ------------------------ |  | ----- |  |  |  | ------ | 
|                            |  | 2013                                |       |  | 2012                     |  |        | 2011                                | 
|                            |  | Millions ofbarrels of oilequivalent |       |  | % of totalprovedreserves |  |        | Millions ofbarrels of oilequivalent |  |  | % of totalprovedreserves |  |  | Millions ofbarrels of oilequivalent |        |  | % of totalprovedreserves | 
|Proved developed reserves   |  |                                     | 112.2 |  |                          |  | 54.70% |                                     |  |  | 123.8                    |  |  |                                     | 57.49% |  |                          |  | 125.3 |  |  |  | 56.19% | 
|Proved undeveloped reserves |  |                                     | 92.9  |  |                          |  | 45.30% |                                     |  |  | 91.5                     |  |  |                                     | 42.51% |  |                          |  | 97.7  |  |  |  | 43.81% | 
|                            |  |                                     |       |  |                          |  |        |                                     |  |  |                          |  |  |                                     |        |  |                          |  |       |  |  |  |        | 
|Total Proved Reserves       |  |                                     | 205.1 |  |                          |  | 100%   |                                     |  |  | 215.3                    |  |  |                                     | 100%   |  |                          |  | 223.0 |  |  |  | 100%   | 

Estimated reserves were subject to economic evaluation to determine their economic
limits. Estimated reserves in Argentina are stated before royalties since royalties have the same impact as taxes on production and are not paid in kind, and therefore are treated as operating costs. Estimated reserves in Venezuela are also stated
before royalties and are computed by multiplying our ownership in each mixed-ownership company by the proved reserves volumes of the relevant mixed-ownership company.

As of December 31, 2013, 55% of our proved reserves were developed, while 45% were undeveloped. Proved developed
reserves were 112.2 million of barrels of oil equivalent.



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As of December 31, 2013, proved undeveloped reserves were 92.9 MMboe,
all of which correspond to wells located within one offset of proved developed reserves and gas fields where the activity has been scheduled to maintain production levels in accordance with contracts and installed facilities. The Company plans to
put 89% of these proved undeveloped reserves into production through activities to be implemented over the next five years. The 11% of these reserves that will be developed over periods exceeding five years are mainly located in gas fields where the
activity has been scheduled to maintain production levels in accordance with contracts and installed facilities.

We have a total of seven million barrels of oil equivalent of proved undeveloped reserves, all located in Argentina, that have been booked for more than five years. This is because such reserves are
mainly located in gas fields where the activity has been scheduled to maintain production levels in accordance with contracts and installed facilities.

We prioritize the development of new business opportunities associated with non-conventional gas reserves in Argentina. During 2013, we drilled three new wells in the El Mangrullo area and two wells in
the Sierra Chata area aimed at developing non-conventional gas reserves of the Mulichinco Reservoir. See Oil and Gas Exploration and ProductionProductionArgentine Production. Gas produced in Río Neuquén is
tight gas. In December 2011, the SE approved the sale of tight gas under the Gas Plus program.

There are many
uncertainties in estimating quantities of proved reserves and in projecting future rates of production and the timing of development expenditures, including certain factors that are beyond our control. The reserves data set forth in this Annual
Report solely represents estimates of our proved oil and gas reserves. Reserves engineering is a subjective process of estimating underground accumulations of crude oil and natural gas that cannot be precisely measured. The accuracy of a reserves
estimate stems from available data, engineering and geological interpretation and judgment of reserves and reservoir engineering. As a result, different engineers often obtain different estimates. In addition, results of drilling, testing and
production subsequent to the date of an estimate may justify revision of such estimate, so the reserves estimates at a specific time are often different from the quantities of oil and gas that are ultimately recovered. Furthermore, estimates of
future net revenues from our proved reserves and the present value thereof are based upon assumptions about future production levels, prices and costs that may prove to be incorrect over time. Estimates of future prices, costs and production volumes
are subject to uncertainties and may prove to be incorrect over time. The meaningfulness of such estimates is highly dependent upon the accuracy of the assumptions upon which they are based. Accordingly, we cannot provide assurances that any
specified production levels will be reached or that any cash flow arising therefrom will be produced. The actual quantity of our reserves and future net cash flows therefrom may be materially different from the estimates set forth in this Annual
Report.

We replace our reserves through the acquisition of producing fields, exploration and by proving
up reserves in existing fields. Proving up is the process by which additional reserves classified as probable and possible reserves in a producing field are accessed and reclassified as proved reserves. We
prove up reserves with reservoir management techniques, as waterflooding and enhanced oil recovery projects. The reservoir management techniques currently used are water injection and the drilling of horizontal producing and injection wells.
Technologies such as 3D seismic process, horizontal and step out wells, underbalance drilling and reservoir numerical stimulation are also used.

Sales

The following table sets forth sales for the Oil and
Gas Exploration and Production business segment, by geographical area for the fiscal years ended December 31, 2013, 2012 and 2011:



|                  |  |                         |       |  |      |  |       |      |  |  |       | 
|----------------- |  | ----------------------- | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                  |  | Year ended December 31, |      
|                  |  | 2013                    |       |  | 2012 |  |       | 2011 | 
|                  |  | (in millions of pesos ) |      
|Argentina         |  |                         | 7,649 |  |      |  | 5,945 |      |  |  | 3,984 | 
|Outside Argentina |  |                         | 189   |  |      |  | 168   |      |  |  | 160   | 
|                  |  |                         |       |  |      |  |       |      |  |  |       | 
|Total             |  |                         | 7,838 |  |      |  | 6,113 |      |  |  | 4,144 | 
|                  |  |                         |       |  |      |  |       |      |  |  |       | 

The increase in sales during 2013 was mainly due to higher prices during 2013. See
Item 5. Operating and Financial Review and ProspectsDiscussion of ResultsYear ended December 31, 2013 compared to year ended December 31, 2012Analysis of Operating Income by Business Segment.

OCP

In
2001, the Ecuadorian government awarded OCP the rights to construction and operation for a 20-year term of the 503 km-long pipeline that runs from the northeastern region of Ecuador to the Balao distribution terminal on the Pacific Ocean coast. As
of December 31, 2013, we held an 11.42% interest in OCP. OCPs other shareholders are Andes Petroleum, Ecuador Ltd., Perenco Ecuador Limited, Occidental del Ecuador Inc., Repsol Ecuador S.A. and AGIP Oleoducto de Crudos Pesados B.V.



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The oil pipeline has a transportation capacity of approximately 450,000
barrels per day, of which at least 350,000 barrels per day are committed under transportation agreements that include a Ship or Pay clause. Because the oil pipeline runs across ecologically sensitive areas, the pipeline was constructed following
stringent environmental and technical standards. The construction of the oil pipeline was completed and it began operations in 2003.

We entered into a transportation agreement with OCP that includes a Ship or Pay clause whereby OCP has committed to transport 80,000 barrels per day of our oil for a 15-year term, from November 2003.

During 2013, PESA received dividends totaling Ps. 4 million from OCP.

For a more detailed discussion see Oil and Gas Exploration and ProductionProductionProduction
outside ArgentinaEcuador.

Oleoductos del Valle S.A. (Oldelval)

As of December 31, 2013, we held a 23.1% interest in Oldelval, which is the concessionaire of the transportation of
crude oil through a 888 km-long oil pipeline between the Neuquén basin and Puerto Rosales (located in the Province of Buenos Aires). Oldelval operates trunk oil pipelines, providing access to the AllenPuerto Rosales pipeline, with 1,706
km of installed piping. The concession has a 35-year term starting in 1993, with an option to extend the term for ten additional years. Oldelvals other shareholders are YPF, Chevron Argentina S.R.L., Pluspetrol S.A., Pan American Energy
Ibérica S.L. and Tecpetrol S.A.

The Allen-Puerto Rosales pipeline has a transportation capacity of
approximately 220,000 barrels per day, with one million barrels of storage capacity.

During 2013, oil volumes
transported by Oldelval from Allen to Puerto Rosales totalled 49.4 million barrels, a 9.7% decrease when compared to 2012, mainly due to a decrease in production of the Neuquén basin.

The applicable laws governing the transportation of hydrocarbons through oil pipelines, which are based on the notion of
free access, assign loading preference quotas to pipeline owners based on their shareholdings. Oil transportation rates are set by the SE.

Competition

Our oil and gas related businesses are subject to oil price fluctuations determined by international market conditions and internal price controls, export restrictions and other regulations. In our oil
and gas operations in and outside of Argentina, we face competition from oil and gas producers throughout the world.



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REFINING AND DISTRIBUTION

Our presence in the Refining and Distribution business segment is a further step towards the vertical integration of our
operations and enables us to capitalize on our hydrocarbon reserves. Refining and distribution operations are a necessary link in the business value chain, starting with crude oil and gas exploration and production and ending with customer service
at the gas station network and the supply of petrochemical products.

As of December 31, 2013, our
Refining and Distribution operations were based in Argentina where we operate a refinery and a network of 268 gas stations. Our refinery is located in Bahía Blanca (Province of Buenos Aires). In addition, we have a 28.5% interest in
Refinería del Norte S.A. (Refinor).

Our main strategy in the Refining and Distribution
segment is to seek profitability through a balanced crude oil refining, logistics and commercial chain.

On May 2, 2011, we sold our San Lorenzo refinery, its loading and unloading facilities and the associated
fuel sales network to Oil Combustibles S.A. (Oil Combustibles), following an agreement for the sale of such assets approved by the Board of Directors on May 4, 2010. This transaction was consistent with our strategy of assessing our
business and asset portfolio structure on an ongoing basis with a view to identifying opportunities to maximize value for our shareholders. As of the date of this Annual Report, the transaction remains subject to approval by the
Comisión Nacional de Defensa de la Competencia(the Argentine Antitrust Commission or CNDC).

The Refining and Distribution Business in Argentina

In 2013, gasoline and diesel sales volumes in the Argentine fuel market totalled 22 million cubic meters, a 4.4% increase compared to 2012. According to the SE, diesel sales volumes in the
domestic market increased 1.9% to 13.5 million cubic meters as a consequence of a increase in demand by the agricultural and industrial sectors.

According to the SE, the gasoline market grew by 8.9% during 2013, with sales volumes totaling 8.2 million cubic meters. This growth was mainly attributable to a strong increase in automobile sales
during 2010 to 2013.

The compressed natural gas (CNG) market totalled 2.7 million cubic
meters, a 1.9% increase compared to 2012.

Refining Division

Ricardo Eliçabe Refinery

As of December 31, 2013, our Ricardo Eliçabe refinery (the Refinery) had a total refining capacity of 30,500 barrels of oil per day. The Refinery is located in the
city of Bahía Blanca, in the Province of Buenos Aires, a strategic location for the reception of crude oil coming through an oil pipeline from the Neuquén basin, for other Argentine crude oil coming by sea from the Golfo San Jorge or
Santa Cruz Sur basins, and for imports from international markets. With a crude oil processing capacity of approximately 30,500 barrels per day, the Refinery produces a wide variety of products: regular gasoline, premium gasoline and ultra-high
octane gasoline (Podium), diesel, fuel oil, asphalts and liquefied gases (propane and butane).

The
Refinery also produces intermediate fuel oil (IFOs) mixes used as fuel in vessels, raw materials for solvents and varieties for the petrochemical industry. The Refinery has a storage capacity of 480,000 barrels of heavy products and
690,000 barrels of light products.

During 2013, the Refinery processed an average of 28,730 barrels of oil
per day. In 2012, the Refinery processed an average of 28,722 barrels per day.

Dock Sud Plant

The Dock Sud plant, located in the province of Buenos Aires, close to the city of Buenos Aires, has a total storage
capacity of approximately 1,230,000 barrels of heavy and light products. This plant is connected to the Oiltanking Ebytem terminal in the city of Bahía Blanca through a pipeline.

Caleta Paula Plant

The Caleta Paula plant is our newest distribution plant. It is located in the Province of Santa Cruz, close to the city of Comodoro Rivadavia, in southern Argentina. The strategic location of this plant
significantly improves our logistical capacity in an area distant from refineries. In addition, it allows us to maintain significant stocks of products to satisfy demand in the southern area of the country for gasoline, diesel and lubricants. The
plant is located on the Atlantic coast, and is supplied by vessels and supplemented by truck loading facilities. It has a storage capacity of 82,000 barrels of light products.



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Refining Investment Plans

In 2014, we have a scheduled shutdown for maintenance works involving the Refinery processing units, utilities and
offsites, that will not affect our ability to meet the demand. In addition, the Company will continue works relating to upgrading of the duct system at the Refinery, the Galván warehouse and Puerto Galván in addition to programs
relating to maintenance, retrofitting of truck dispatch facilities and operational reliability.

We will
continue with the evaluation of a new diesel hydrotreatment unit project and the expansion of topping and vacuum capacity at the Refinery.

In Dock Sud, investments will be made in the fire system and also in fuel tanks.

Distribution Division

As of December 31, 2013, our commercial network of gas stations and wholesale customers allowed us to deliver products and services to a number of regions in Argentina. In recent years, our strategy
has been to optimize our customer portfolio, adapt its size to our production capacity, and streamline distribution processes.

As of December 31, 2013, we had a network of 268 gas stations located throughout Argentina, of which 261 bear the Petrobras brand name and 31 Spacio 1 convenience stores.

In addition, we continued with the implementation of the Controlled Quality Program to ensure product quality
standards. Gas stations exceeding the standards required now have a certificate that should be displayed in a place clearly visible to customers.

We also continued with the Challenge Program, providing training at gas stations through the Mobile Classroom modality and including two vehicles identified and equipped to develop and increase brand
value through standardization of the customer service model in our gas stations.

On December 13, 2013 we
received the Annual Safety Award  Distribution segment from the IAPG for our assessment of accident statistics and safety management, involving gas station operations, engineering, gas station maintenance and fuel transportation
activities.

PESAs points of sale (gas stations) in Argentina as of December 31, 2013 were as
follows:



|              |  |                        |     | 
|------------- |  | ---------------------- | --- | 
|              |  | As of December 31,2013 |    
|Owned(1)      |  |                        | 79  | 
|Franchised(2) |  |                        | 189 | 
|              |  |                        |     | 
|Total         |  |                        | 268 | 
|              |  |                        |     | 



| | (1) | Owned or controlled by PESA under long-term commercial contracts or other types of contractual relationships that secure a long-term direct
influence over such points of sale.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (2) | The term franchised is used to refer to gas stations owned by third parties with whom PESA has signed a franchise agreement that
provides PESA with the right (i) to become the gas stations exclusive supplier and (ii) to brand the gas station with its corporate image. Current laws establish that the term of such contracts should be five years for existing
stations and eight years for newly constructed stations.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

PESA sells fuels in Argentina
under the Petrobras and other brand names. Distribution as of December 31, 2013 was broken down as follows:

Gas
Stations



|                  |  |                        |     | 
|----------------- |  | ---------------------- | --- | 
|                  |  | As of December 31,2013 |    
|Petrobras-branded |  |                        | 261 | 
|Other brands      |  |                        | 7   | 
|                  |  |                        |     | 
|Total             |  |                        | 268 | 
|                  |  |                        |     | 

Our liquid fuels domestic sales totalled 1.20 million cubic meters during 2013,
compared to 1.19 million cubic meters in 2012. As a result, our market share in 2013 was 5.6%, compared to 5.7% in 2012, ranking us fourth in the Argentine market.

Out of 1.20 million cubic meters of total liquid fuels sold in 2013, 0.74 million cubic meters were diesel, a
1.6% increase when compared to 2012. Gasoline sales, in turn, totalled 0.5 million cubic meters, a 1.5% increase compared to 2012. In addition, annual sales of premium gasoline totalled 92 thousand cubic meters, with a 4.7% market share.



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Our distribution business is also focused on lubricants. We aim at
consolidating the Lubrax brand in Argentina through the development of exclusive lubricant customers, the leveraging of combined sales with liquid fuels and promotions at retail outlets.

In 2013, Lubrax sales in the Argentine market totalled 17,300 cubic meters, a 19.9% decrease when compared to 2012, due
to our decision to target primarily distribution of lubricants in the most profitable channels, and thereby increase the average unit margin at the expense of market share. Our share in the lubricants market in 2013 was 5.7%, compared to 7.3% in
2012. This decrease was mainly attributable to the unscheduled interruption in the local supply of raw material during April and May, resulting in a drop in the supply of available product. This was in addition to the aggressive pricing policies
pursued by some competitor.

We also sell oil products to the industrial, construction and marine markets.
Products sold in these markets include marine fuels and lubricants, asphalts and other products. In 2013, we sold 1,829,000 tons of IFOs bunker, used in ships. In addition, we sold 33,500 cubic meters of marine diesel, representing a 11% market
share in 2013.

In 2013, we continued developing the New Quality Asphalt project, pursuant to which the
Refinery has begun to produce and market a higher-quality asphalt product, which represented 64% of the supply of asphalt from our Refinery. In 2013, we sold 85,300 tons of asphalt, representing a 18% market share.

The following table shows production and sales for our consolidated Refining and Distribution segment for the fiscal
years ended December 31, 2013, 2012 and 2011:



|                                                  |  |                         |        |  |      |  |        |      |  |  |        | 
|------------------------------------------------- |  | ----------------------- | ------ |  | ---- |  | ------ | ---- |  |  | ------ | 
|                                                  |  | Year Ended December 31, |       
|                                                  |  | 2013                    |        |  | 2012 |  |        | 2011 | 
|Average crude oil processed per day (barrels) (1) |  |                         | 28,730 |  |      |  | 28,700 |      |  |  | 36,300 | 
|                                                  |  |                         |       
|Production (thousands of tons):                   |  |                         |        |  |      |  |        |      |  |  |        | 
|Virgin naphtha                                    |  |                         | 34     |  |      |  | 58     |      |  |  | 378    | 
|Diesel                                            |  |                         | 485    |  |      |  | 494    |      |  |  | 691    | 
|Other products                                    |  |                         | 863    |  |      |  | 846    |      |  |  | 700    | 
|                                                  |  |                         |       
|Sales (in thousands of m3):                       |  |                         |        |  |      |  |        |      |  |  |        | 
|Crude oil                                         |  |                         | 284    |  |      |  | 482    |      |  |  | 480    | 
|Gasoline                                          |  |                         | 554    |  |      |  | 547    |      |  |  | 856    | 
|Diesel                                            |  |                         | 782    |  |      |  | 791    |      |  |  | 1,272  | 
|Fuel oil/IFOs                                     |  |                         | 395    |  |      |  | 391    |      |  |  | 406    | 
|Paraffins                                         |  |                         | 20     |  |      |  | 46     |      |  |  | 224    | 
|Others                                            |  |                         | 211    |  |      |  | 218    |      |  |  | 417    | 
|                                                  |  |                         |       
|Sales (in millions of pesos):                     |  |                         |        |  |      |  |        |      |  |  |        | 
|Argentina                                         |  |                         | 7,174  |  |      |  | 6,097  |      |  |  | 6,461  | 
|Outside Argentina                                 |  |                         | 972    |  |      |  | 859    |      |  |  | 890    | 
|                                                  |  |                         |        |  |      |  |        |      |  |  |        | 
|Total sales (in millions of pesos)                |  |                         | 8,146  |  |      |  | 6,957  |      |  |  | 7,351  | 
|                                                  |  |                         |        |  |      |  |        |      |  |  |        | 



| | (1) | Until May 2, 2011 includes crude oil processed in the San Lorenzo refinery.
| | --- | ---------------------------------------------------------------------------

Since 2012, we have assigned our catalytic reformer plant operations to the Petrochemicals segment, which accounted for
sales of Ps. 1,110 million in 2013 and Ps. 1,014 million in 2012. Prior to 2012, our catalytic reformer plant operations had been reporting under the Refining and Distribution segment. Sales of our catalytic reformer plant in 2011 totalled
443 thousand cubic meters (310 thousand tons).

Refinor

We have a 28.5% interest in Refinor, whose other shareholders are YPF (50%) and Pluspetrol S.A. (21.5%). Refinor is
engaged in crude oil refining, natural gas processing, product transportation, marketing and sales. See Item 3. Key InformationRisk FactorsThe Argentine government and provincial governments have intervened in the oil and gas
industry in the past, and are likely to continue to intervene.

Refinor owns the
only refinery in the northern region of Argentina, which is located in Campo Durán, Province of Salta. Refinors refining capacity is approximately 26,400 barrels of oil per day and its natural gas processing capacity is
20.4 million cubic meters of gas per day
(MMm3/d).



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Refinor owns and operates the following processing plants: an atmospheric
distillation unit (topping), a vacuum distillation unit, a gasoline hydro-treatment unit, a catalytic reformer plant, a new plant of Isopentane by fractional distillation of gasoline turbex (operating since April 2013), two turboexpander and
fractioning plants for LPG production, as well as a plant for the production of auxiliary services (industrial water, steam, electricity, compressed air) used in the different processing plants.

The Campo Durán refinery receives crude oil/condensate and natural gas from the Northwestern basin and from
Bolivia. These operations are conducted through two oil pipelines and three gas pipelines.

In addition,
Refinor operates a 1,100 km-long pipeline running from Campo Durán (in the Province of Salta) to Montecristo (in the Province of Córdoba) for the distribution of its products. Along the pipeline,
the Banda Río Salí (in the Province of Tucumán), Güemes (in the Province of Salta) and Leales (in the Province of Tucumán) dispatch plants are supplied. This pipeline is the most important distribution channel for
liquids generated in the Northwestern basin in Argentina and transports diesel, virgin naphtha, motor gasoline, butane and propane.

As of December 31, 2013, Refinor had a commercial network of 69 gas stations located in the Provinces of Salta, Tucumán, Jujuy, Córdoba, Santiago del Estero, La Rioja, Catamarca and
Chaco. Through these gas stations, Refinor sells a high performance fuel line: Refinor 97 (97 octane), High grade (95 octane), Regular (85 octane) and Eco Diesel.

In 2013, daily average volumes of crude oil processed totalled 15,844 barrels per day, a 12.5% increase compared to 2012.
This increase is explained by the importation of Bolivian Blend oil condensate from the neighboring country of Bolivia under a temporary import regime.

Sales volumes totalled 997,000 cubic meters per year, a 19.1% increase compared to 2012, 491,000 cubic meters of which
were directed to the domestic market and 506,000 cubic meters of which were directed to export markets. During 2013, Refinor had a market share of approximately 27.1% and 18.7% in the motor gasoline and diesel markets, respectively, in the
Northwestern region of Argentina. Considering the size of its gas station network, Refinor remains the company with the second highest number of retail outlets and sales volumes in the Northwestern region of Argentina.

In 2013, Refinor processed an average of 14.6 million cubic meters of gas per day, a 4.6% decrease compared to 2012.
However, during 2013, Refinor produced 319,600 tons of LPG, only a 3.0% decrease compared to its LPG production during 2012.

Sales of LPG totalled approximately 298,000 tons during the year, a 4.8% decrease when compared to 2012.

The following table sets forth Refinors production and sales for the fiscal years ended December 31, 2013, 2012 and 2011:



|                                   |  |                         |       |  |      |  |       |      |  |  |       | 
|---------------------------------- |  | ----------------------- | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                                   |  | Year ended December 31, |      
|                                   |  | 2013                    |       |  | 2012 |  |       | 2011 | 
|Production (in thousands of m3):   |  |                         |       |  |      |  |       |      |  |  |       | 
|Gasoline                           |  |                         | 173   |  |      |  | 131   |      |  |  | 116   | 
|Virgin naphtha                     |  |                         | 290   |  |      |  | 222   |      |  |  | 147   | 
|Diesel                             |  |                         | 330   |  |      |  | 317   |      |  |  | 244   | 
|Natural gasoline                   |  |                         | 89    |  |      |  | 100   |      |  |  | 122   | 
|Propane / butane                   |  |                         | 320   |  |      |  | 330   |      |  |  | 302   | 
|Other products                     |  |                         | 81    |  |      |  | 98    |      |  |  | 95    | 
|                                   |  |                         |      
|Sales (in thousands of m3):        |  |                         |       |  |      |  |       |      |  |  |       | 
|Gasoline                           |  |                         | 172   |  |      |  | 130   |      |  |  | 117   | 
|Virgin naphtha                     |  |                         | 385   |  |      |  | 279   |      |  |  | 279   | 
|Diesel                             |  |                         | 338   |  |      |  | 309   |      |  |  | 264   | 
|Propane/butane                     |  |                         | 298   |  |      |  | 313   |      |  |  | 285   | 
|Other products                     |  |                         | 102   |  |      |  | 119   |      |  |  | 99    | 
|                                   |  |                         |      
|Sales (in millions of pesos):      |  |                         |       |  |      |  |       |      |  |  |       | 
|Argentina                          |  |                         | 2,212 |  |      |  | 1,906 |      |  |  | 1,601 | 
|Outside Argentina                  |  |                         | 1,856 |  |      |  | 947   |      |  |  | 556   | 
|                                   |  |                         |       |  |      |  |       |      |  |  |       | 
|Total sales (in millions of pesos) |  |                         | 4,068 |  |      |  | 2,853 |      |  |  | 2,157 | 
|                                   |  |                         |       |  |      |  |       |      |  |  |       | 



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Competition

Our principal competitors in the Argentine gasoline and diesel markets are YPF, Shell C.A.P.S.A, Axion Energy Argentina S.A., and Oil Combustibles, which in 2013 had market shares of approximately 56.6%,
15.6%, 14%, and 4.6% respectively, according to the SE.



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PETROCHEMICALS

The Petrochemicals business segment is an important component of our vertical integration strategy. Our goal in the
Petrochemicals business segment is to maintain our position in the styrenics market by capitalizing on current conditions and maximizing the use of our own petrochemicals raw materials.

As of December 31, 2013, our Petrochemical operations were entirely based in Argentina. We produce a wide array of
products, such as intermediate gasoline, aromatic solvents, hexane and other hydrogenated paraffinic solvents, propellants for the cosmetic industry, monomer styrene, rubber and polymers for the domestic and foreign markets from natural gas, virgin
naphtha, propane and other supplies.

Argentine Operations

In Argentina, we are the only producer of styrene, polystyrene and elastomers, and the only integrated producer of
plastics derived from oil production. As part of our efforts to integrate our operations, we use a substantial amount of styrene for the production of polystyrene and synthetic rubber.

The petrochemicals division has the following plants:



| |  |  | An integrated petrochemicals complex at Puerto General San Martín, in the Province of Santa Fé, with an annual production capacity of
50,000 tons of gases (LPG y propellants), 155,000 tons of aromatics, 290,000 tons of gasoline and raffinate, 160,000 tons of styrene, 58,500 tons of synthetic rubber, 180,000 tons of ethylbenzene and 31,000 tons of ethylene.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A polystyrene plant located in the city of Zárate, in the Province of Buenos Aires, with a production capacity of 65,000 tons of polystyrene
and 14,000 tons of bioriented polystyrene (BOPS) per year. This state-of-the-art BOPS plant is the only of its type in South America.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | An ethylene plant located in San Lorenzo, Province of Santa Fé, with a production capacity of 19,000 tons per year. It is located along the
Paraná river coast, near the Puerto General San Martín petrochemicals complex, which uses ethylene as raw material for the production of ethylbenzene and styrene.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Styrenics Division

Monomer styrene sales volumes during 2013 totalled 68.4 thousand tons, a decrease of 1% compared to 2012. This decrease in sales volumes was mainly attributable to lower production. Sales volumes in
the domestic market grew 7% from 2012, and achieved a record level of 42 thousand tons, as a result of a sustained demand for styrene emulsions and EPS (expanded polystyrene), but export sales to Chile and Brazil declined.

In 2013, polystyrene sales volumes totalled 50.2 thousand tons, 9% less than in 2012, due to lower production level
as a consequence of trade union conflicts at the Zárate plant between the months of March and June. We have compensated the decrease in production, priority was given to the supply of the Argentine market through product imports. Imports of
polystyrene totalled 12.5 thousand tons and 0.4 thousand tons in 2013 and 2012, respectively. As a result, domestic sales increased 1% compared to 2012, mainly directed to the dairy market.

In 2013, sales volumes of BOPS totalled 8.6 thousand tons, 23% less than in 2012. In this respect, the export market
was the most affected, accounting for 29% decreased, due to lower production as a consequence of trade union conflicts at the Zárate plant.

In 2013, sales of synthetic rubber totalled 49.7 thousand tons, approximately 7% more than in 2012. Out of this volume, 24 thousand tons were sold in the domestic market, accounting for a 10%
increase compared to 2012, and 25.7 thousand tons were sold as exports, which accounts for a 4% increase compared to 2012. The increase in regional sales is attributable to the development of new customers and to sustained Brazilian demand.

Also in 2013, we continued producing polymers with low aromatic content meeting European regulation
standards, in response to our clients demand.

Reforming Gasoline Division

In 2013, the Reforming Gasoline Division performed the annual shutdown on schedule and within budget. The upgrading of the
facilities allowed for a significant increase in the production of Propellant Gas. In addition, improvements were made to optimize energy consumption and light gas recovery.



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Sales of intermediate gasoline and naptha during 2013 totalled
289 thousand tons, of which 71 thousand tons were directed to the export market. Sales of aromatics and other products during 2013 totalled 55 thousand tons, 70% of which were directed to the domestic market, an increase of 12%
compared to 2012.

Propellant Gas sales totalled 11.9 thousand tons in 2013, accounting for a 46%
increase compared to 2012, attributable to improvements at Puerto General San Martín plant.

As of
December 31, 2013, our estimated market shares of the following products in Argentina were:



| |  |  | Styrene  100%;
| | - |  | ---------------



| |  |  | Polystyrene  87%; and
| | - |  | ----------------------



| |  |  | Styrene butadiene rubber (SBR)  81%.
| | - |  | ---------------------------------------

The following table sets forth production and sales by major product for the Petrochemicals division in Argentina for the
fiscal years ended December 31, 2013, 2012 and 2011:



|                                   |  |                         |       |  |      |  |       |      |  |  |       | 
|---------------------------------- |  | ----------------------- | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                                   |  | Year ended December 31, |      
|                                   |  | 2013                    |       |  | 2012 |  |       | 2011 | 
|Production (thousands of tons):    |  |                         |       |  |      |  |       |      |  |  |       | 
|Styrene(1)                         |  |                         | 122   |  |      |  | 143   |      |  |  | 136   | 
|Synthetic rubber(2)                |  |                         | 49    |  |      |  | 47    |      |  |  | 45    | 
|Polystyrene                        |  |                         | 44    |  |      |  | 64    |      |  |  | 57    | 
|BOPS                               |  |                         | 9     |  |      |  | 11    |      |  |  | 10    | 
|Naphtha(3)                         |  |                         | 281   |  |      |  | 324   |      |  |  |      | 
|Aromatics and other products(3)    |  |                         | 183   |  |      |  | 71    |      |  |  |      | 
|                                   |  |                         |      
|Sales (thousands of tons):         |  |                         |       |  |      |  |       |      |  |  |       | 
|Styrene(1)                         |  |                         | 68    |  |      |  | 69    |      |  |  | 81    | 
|Synthetic rubber(2)                |  |                         | 50    |  |      |  | 46    |      |  |  | 47    | 
|Polystyrene and BOPS               |  |                         | 59    |  |      |  | 67    |      |  |  | 63    | 
|Propylene (incluye etileno)        |  |                         | 19    |  |      |  | 25    |      |  |  | 27    | 
|Naphtha(3)                         |  |                         | 285   |  |      |  | 324   |      |  |  |      | 
|Aromatics and other products(3)    |  |                         | 69    |  |      |  | 69    |      |  |  |      | 
|                                   |  |                         |      
|Sales (in millions of pesos):      |  |                         |       |  |      |  |       |      |  |  |       | 
|Argentina                          |  |                         | 2,334 |  |      |  | 1,861 |      |  |  | 1,103 | 
|Outside Argentina                  |  |                         | 1,014 |  |      |  | 1,046 |      |  |  | 700   | 
|                                   |  |                         |       |  |      |  |       |      |  |  |       | 
|Total sales (in millions of pesos) |  |                         | 3,348 |  |      |  | 2,907 |      |  |  | 1,803 | 
|                                   |  |                         |       |  |      |  |       |      |  |  |       | 



| | (1) | Including ethylbenzene.
| | --- | -----------------------

| | (2) | Including SBR, NBR and butadiene.
| | --- | ---------------------------------

| | (3) | Only since January 2012, due to the incorporation of the catalytic reformer plant operations in the Petrochemicals segment.
| | --- | ---------------------------------------------------------------------------------------------------------------------------

Sales for this business segment increased by Ps. 441 million, or 15.2%, to Ps.
3,348 million in 2013 from Ps. 2,907 million in 2012, primarily as a consequence of a 26% rise in average sales prices, which more than offset a decline in volumes sold.

Since 2012, we report our catalytic reformer plant operations as part of the Petrochemicals segment, which accounted for
sales of Ps. 1,110 million in 2013 and Ps. 1,014 million in 2012. Prior to 2012, we reported our catalytic reformer plant operations under the Refining and Distribution segment, with sales totaling 443 thousand cubic meters (310
thousand tons) in 2011.

Competition

The petrochemicals market in which we compete is highly cyclical, and world market conditions have a strong impact on our results of operations. We are the only producer of styrene, polystyrene and
elastomers in Argentina, but compete with other foreign producers, especially those located in Brazil.



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GAS AND ENERGY

The Gas and Energy business segment links our energy businesses and allows us, by integrating our various businesses, to
maximize profits from gas and electricity production.

Our Gas and Energy segment sells gas produced by our
Oil and Gas Exploration and Production business segment. We also provide gas and LPG brokerage and trading services. In addition, through our stake in TGS, we are engaged in the transportation of gas in southern Argentina and in the processing and
marketing of NGL. We are a major player in the Argentine electricity market, where we operate in the generation segment.

On January 30, 2013, we agreed to sell our direct and indirect interest in Distrilec to Hidroeléctrica Piedra del Águila S.A. and La Plata Cogeneración S.A. for U.S.$35 million,
thereby withdrawing from the electricity distribution business.

In the Gas and Energy segment, our main
business objective is to increase profitability in each of our gas marketing and transportation business, our LPG business and our electricity generation operations.

Gas Marketing and Transportation

We sell gas produced by
our Oil and Gas Exploration and Production segment, and purchase gas to supply internal consumption needs. In addition, we provide gas and LPG brokerage and trading services. We also assist clients in sales, logistics, foreign trade and marketing of
gas and LPG.

In 2013, Argentine sales of gas produced by us totalled 7.1 MMm3/d. We sold 1.9 MMm3/d under the brokerage modality and purchased 1.1 MMm3/d from third parties to cover our commitments to supply internal
consumption. Our sales of LPG produced by us and third parties totalled 94,300 tons. Distribution was implemented through the Companys own and third parties transport fleets in order to supply clients and secure compliance with
commitments undertaken.

During July 2011, PESA began to deliver gas from the El Mangrullo area, which
was recognized as non-conventional and sold under the Gas Plus program introduced by the Argentine government in 2008. Additionally, in July 2012, sales of non-conventional gas from the Río Neuquén area started. Such gas was also
recognized as non-conventional and was allowed to be sold under the Gas Plus modality. In July, we renewed the agreements with the Compañía Administradora del Mercado Mayorista Eléctrico S.A.(the wholesale electric
market administration company, or CAMMESA) for the sale of non-conventional gas from El Mangrullo and Río Neuquén areas involving delivery of gas from those areas under the Gas Plus modality. See Regulation of
our BusinessArgentine Regulatory FrameworkAdjustment of Natural Gas Price at Wellhead.

Gas Transportation
 TGS

Our Interest in TGS and Corporate Developments

We indirectly hold a 25.5% interest in TGS. TGSs controlling shareholder is Compañía de
Inversiones de Energía S.A. (CIESA), which as of the date of this Annual Report holds 51% of TGSs capital stock. The ANSES holds 23.11% and the remaining 25.89% of TGSs capital stock is publicly held. TGSs
shares are listed on the Buenos Aires Stock Exchange and on the NYSE, in the form of ADSs. PESA has an interest of 50% in CIESA (directly and indirectly through our subsidiary Petrobras Hispano Argentina S.A. (Petrobras Hispano)), 40% of
which is held by a trust whose trustee is The Royal Bank of Scotland N.V. Sucursal Argentina (the Trust). The remaining 10% is held by Enron Pipeline Company Argentina S.A. (EPCA), which was acquired by Pampa Inversiones S.A.
(together with Pampa Energía S.A., the Pampa Group) on April 8, 2011.

CIESAs and TGSs current equity ownership reflects the implementation of the first stage of the master
settlement agreement and the mutual release agreement, signed by PESA and certain subsidiaries of Enron Creditors Recovery Corp. (Enron, formerly Enron Corp.) on April 16, 2004 (the Master Settlement Agreement), in
connection with the restructuring of CIESAs indebtedness. CIESAs board of directors includes three members nominated by us, two by the Trust and one by EPCA. TGSs board of directors is composed of nine members, six nominated by
CIESA, and three independent members. Pursuant to a shareholders agreement entered into on August 29, 2005 (the Shareholders Agreement) among EPCA, the Trust and us, we have the right to appoint the chairmen of the
boards of directors of both TGS and CIESA and the Chief Executive Officer of TGS.

Following the
enactment of the Public Emergency Law in Argentina, CIESA and TGS both defaulted on their debt during 2002.CIESA failed to repay corporate bonds (Obligaciones Negociables) having a principal amount of U.S.$220 million and derivative
instruments in an amount of approximately U.S.$2 million. In 2004, TGS successfully restructured substantially all of its debt.



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In April 2004, PESA and EPCA, at that time CIESAs only
shareholders, entered into the Master Settlement Agreement to provide the necessary flexibility to move forward in restructuring CIESAs financial debt. The Master Settlement Agreement, among other things, provided for certain stock transfers
to be implemented in two successive steps. In July 2005, the Ente Nacional Regulador del Gas (Argentine Gas Regulatory Agency, or ENARGAS) approved the implementation of the first stage of the transactions contemplated in the
Master Settlement Agreement and, as a result, on August 29, 2005, (a) Enron transferred 40% of CIESAs shares to a newly created trust (the aforementioned Trust), and (b) PESA and its subsidiary, Petrobras Hispano, transferred
Class B common shares of TGS, representing 7.35% of TGSs capital stock, to subsidiaries of Enron, which in turn were subsequently sold to third parties.

Subsequently, pursuant to the terms of the financial debt restructuring agreement entered into on September 1, 2005
by CIESA, PESA, Petrobras Hispano, EPCA, the Trust and all of CIESAs financial creditors (the CIESA Restructuring Agreement), CIESA refinanced approximately U.S.$23 million of its debt for a 10-year term. In addition, the CIESA
Restructuring Agreement sets forth the terms of the Master Settlement Agreement, which provided for the capitalization of debt having a nominal amount of U.S.$201.5 million plus accrued unpaid interest.

While approval of the CIESA Restructuring Agreement by the authorities was pending, on January 9, 2009, Ashmore
Energy International Limited (AEI), the only self-declared holder of notes issued by CIESA in 1997 (the 1997 CIESA Notes), announced its decision to terminate the CIESA Restructuring Agreement, to which AEI, CIESA and others
were a party. Under such circumstances, on January 28, 2009, CIESA brought an action before the courts of the State of New York, United States of America. Following several stages in the proceedings, on May 13, 2010, notice was given to
CIESA of a filing made by AEI in the same court rejecting the claims stated by CIESA and demanding payment of the 1997 CIESA Notes.

On May 10, 2011, CIESA entered into a Memorandum of Understanding with the Pampa Group, which also became the holder of the 1997 CIESA Notes in lieu of AEI. On May 17, 2011, the parties to the
CIESA Restructuring Agreement entered into a fourth amendment of such agreement, which, among other things, provided for the replacement of AEI by the Pampa Group as a party to the CIESA Restructuring Agreement, resulting in a new shareholding
structure of CIESA, in which PESA and its subsidiaries would have a 50% equity interest, and the Pampa Group would have the remaining 50% interest. On October 5, 2011, by note No. 11,362, ENARGAS expressed no regulatory objections to the
CIESA Restructuring Agreement and expressed that it may be effective after approval is obtained from the CNDC. As of the date of issuance of this Annual Report, the CIESA Restructuring Agreement remains subject to approval by the CNDC.

On July 13, 2012, CIESA, Pampa Group and the Company entered into a settlement agreement whereby all parties
involved waived all claims, title and interest under the lawsuit before the New York State Courts and terminated the same. As a result of the agreement, CIESA paid off all of its financial debt by means of (i) the transfer to Pampa Group of
4.3% of TGSs shares; (ii) a cash payment of approximately U.S.$130 million; (iii) the release of the remaining financial debt; and (iv) execution on July 13, 2012 of a fifth amendment to the CIESA Restructuring Agreement
whereby, upon obtaining governmental approval, Pampa Group will receive shares representing 40% of CIESAs capital stock which are currently held in trust by The Royal Bank of Scotland N.V. Sucursal, Argentina.

As a result of the full settlement of CIESAs total financial debt, in the third quarter of 2012, we recorded a gain
of Ps. 291 million on our shareholding in CIESA.

Pursuant to the entry on July 13, 2012 into the
settlement agreement described above, and to decisions taken by CIESAs board of directors meeting held on October 23, 2012, on January 2, 2013, CIESA notified the CNV of the formal cancellation of the 1997 CIESA Notes, initiating the
steps necessary for CIESAs withdrawal from public offering and listing. On May 30, 2013, the CNV ordered CIESAs withdrawal from public offering and listing, through Resolution No. 17,904.

In order to improve the maturity profile of TGSs financial debt, in January 2014, TGS launched an offer for a
voluntary exchange of the 2007 Notes (maturing between 2014 and 2017). To this end, on January 3, 2014, the CNV issued Resolution No. 17,262. As of February 7, 2014, TGS offer had been taken up by holders of approximately
67 % of the 2007 Notes who received new TGS notes maturing between 2014 and 2020.

TGS Business

TGS began operations in late 1992 as a part of the privatization of the Argentine energy sector. Currently, TGS is the
leading gas transportation company in Argentina, delivering about 65% of total gas transported in Argentina during 2013. TGS is also one of the leading NGL producers and traders, in both the domestic and international markets, and an important
provider of midstream services, including business structuring, turnkey construction and operation and maintenance of facilities used for gas storage, conditioning and transportation.

PESA provides services to TGS for the operation and maintenance of the gas transportation system and related facilities
and equipment, to ensure that the system performance is in conformity with international standards and in compliance with certain environmental standards.



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The following chart shows statistical information relating to TGSs
business segments for the fiscal years ended December 31, 2013, 2012 and 2011.



|                                   |  |      |       |   |      |  |       |      |  |  |       |  
|---------------------------------- |  | ---- | ----- | - | ---- |  | ----- | ---- |  |  | ----- | -
|                                   |  | 2013 |       |   | 2012 |  |       | 2011 | 
|Regulated Segment:                 |  |      |       |   |      |  |       |      |  |  |       |  
|Average firm committed capacity(1) |  |      | 82.5  |   |      |  | 82.6  |      |  |  | 80.7  |  
|Average daily deliveries(1)        |  |      | 65.9  |   |      |  | 65.5  |      |  |  | 65.8  |  
|Annual load factor(2)              |  |      | 80    | % |      |  | 79    | %    |  |  | 81    | %
|                                   |  |      |      
|Unregulated Segment:               |  |      |       |   |      |  |       |      |  |  |       |  
|Liquids total production(3)        |  |      | 908.4 |   |      |  | 905.3 |      |  |  | 853.7 |  
|Processing capacity at year end(1) |  |      | 46.0  |   |      |  | 46.0  |      |  |  | 46.0  |  



| | (1) | In MMm3/d.
| | --- | ----------

| | (2) | Corresponds to the quotient of the average daily deliveries and the average firm contracted capacity.
| | --- | -----------------------------------------------------------------------------------------------------

| | (3) | In thousands of tons.
| | --- | ---------------------

Regulated Energy Segment of TGS

TGS has a gas
transportation license in southern Argentina, and is the largest transporter of natural gas in Argentina and all of Latin America. TGSs pipeline system connects Argentinas southern and western gas reserves with the main consumption
centers in those regions, including greater Buenos Aires. TGS has an exclusive license for the use of the southern gas transportation system, which expires in 2027, with an option to extend it for ten additional years if certain conditions are met.

TGS transports gas through more than 9,133 km of pipelines, of which almost 7,636 km
belong to TGS, with a firm contracted capacity as of December 31, 2013 of 82.5 MMm3/d. Pursuant to these contracts, the capacity is reserved and paid for irrespective of the actual use by customers. Almost all capacity of the gas transportation pipelines in Argentina is currently
apportioned among gas distribution companies, large industrial customers and gas-fired power plants under firm long-term transportation contracts. The total average life of TGSs firm transportation contracts is approximately nine years. In
addition, TGS provides interruptible transportation services under which gas transportation is dependent on the availability of excess capacity.

Transportation services begin with the receipt of gas owned by a shipper (e.g., distribution companies, producers, traders or large users) at one or more reception points. It is then
transported and delivered to designated delivery points along the system. The total service area includes approximately 5.7 million end users, approximately 3.8 million of which are in greater Buenos Aires. Direct services to residential,
commercial and industrial users, and electric power plants, are mainly provided by four gas distribution companies, which are connected to the TGS gas pipeline system: Metrogas S.A., Gas Natural Ban S.A., Camuzzi Gas Pampeana S.A. and Camuzzi Gas
del Sur S.A. Some important industries and electric power plants are also located within TGSs operational area and are provided with direct gas transport services by TGS.

TGS has made significant investments in its business since the privatization. As a result,
compression power has been increased from 429,030 horsepower (HP) in 1992 to 759,010 HP in 2013, and contracted firm transportation capacity has been increased from 42.9 MMm3/d in 1992 to 82.5 MMm3/d by the end of 2013.

Tariff Renegotiation Process

As a consequence of
the Public Emergency Law that pesified and prohibited the increase of tariffs, revenues from the regulated energy segment declined considerably. The gas transportation segment represented 23%, 23% and 31% of the total revenues of TGS in 2013, 2012
and 2011, respectively, while from the time of TGSs privatization through 2001, revenues for this segment represented approximately 80% of TGSs total annual revenues. TGS is still engaged in discussions with UNIREN regarding the
renegotiation of its tariffs. As a result, and despite contracted capacity increases, the profitability of the regulated business has not yet been restored.

After UNIREN had submitted to TGS several proposals for tariff adjustment as provided for in the concession contract, which proposals TGS had deemed insufficient, in October 2008 TGS executed a
provisional agreement with UNIREN, which provides for a 20% tariff increase to be retroactively applied as from September 1, 2008 and for the application of the proceeds from such increase to an investment plan in the gas transportation system
provided under the same agreement. On December 3, 2009, the Argentine government issued Decree No. 1,918/09 ratifying the provisional agreement. As a result, TGS was to invoice the tariff increase to its customers once ENARGAS had
published the new tariff schedule and defined the billing method for the retroactive effect. In light of ENARGASs delay in completing this administrative step, in August 2010, TGS sent a letter to ENARGAS requesting authorization to publish
the new tariff schedule including the 20% provisional tariff increase, and the method for collection of the retroactive increase, the application of an interest rate in accordance with the payment terms to be defined. ENARGAS replied to TGS that it
had forwarded



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the background information and the tariff project to the Secretaría de Coordinación y Control de Gestión(the SCyCG), within the scope of the Ministry of
Federal Planning, in compliance with Resolution No. 2,000/05 issued by the Ministry of Federal Planning.

On September 30, 2010, TGS filed a summary action for the protection of its constitutional rights (acción
de amparo) against ENARGAS and the SCyCG seeking the implementation of the new tariff schedule. On November 8, 2010, notice was served on TGS of the judgment granting the requested protection and thus ordering the SCyCG to immediately
return to ENARGAS the documents relating to the new tariff schedule applicable to TGS in compliance with Decree No. 1,918/09, and instructing ENARGAS to define the tariff schedule and the method for collection of the retroactive increase within
two days following receipt of the referred to documents. ENARGAS and the SCyCG appealed this judgment.

In
addition, on November 16, 2010, UNIREN proposed to TGS that it make progress with the renegotiation of the license agreement within the scope and according to the terms and conditions of the Public Emergency Law and required the suspension by
TGS of the before mentioned acción de amparo. In November 2010, TGS agreed to a 20 business days suspension of the acción de amparo automatically renewable at maturity (except if TGSs board of directors were to
decide not to renew the same before or at the end of each period) to move forward with the renegotiation of the license agreement. On December 28, 2010, TGS requested ENARGAS and the Ministry of Federal Planning to jointly request the
suspension of the acción de amparo and, as of the date of this Annual Report, TGS has not received a response to such request.

On April 5, 2011, the Second Chamber of the Court of Appeals in administrative federal matters of the Autonomous City of Buenos Aires set a 60 business day term for the SCyCG to act in accordance
with the provisions of the Ministry of Federal Planning Resolution No. 2,000/05, and deliver to ENARGAS the documents related to the tariff increase schedule, and for ENARGAS to determine, within 60 business day term following receipt of said
documents and verification of compliance with the provisions set forth in the October 2008 transitional agreement, the tariff adjustment and the transitional tariff schedule stipulated therein. ENARGAS filed an extraordinary appeal before the Court
of Appeals, which was dismissed by the Court of Appeals on May 27, 2011. On June 14, 2011, ENARGAS filed before the Supreme Court of Justice a complaint against the refusal to grant such appeal. On November 28, 2013, the Supreme Court
rejected the complaint filed by the ENARGAS and thus affirmed the substance of the judgment delivered by the Judge of First Instance upholding the amparo filed by the Company.

Since more than one year had elapsed since publication of Decree No. 1,918/09, and given the authorization of
suspension of the action for the protection of constitutional rights, which means a material change in the conditions determining the original recording of the tariff increase, TGSs management resolved to: (i) discontinue recording the
revenues attributable to the tariff increase, and (ii) reverse the account receivable previously recorded in the fiscal years ended December 31, 2011, 2010 and 2009. TGS managements decision does not imply a waiver of the rights
conferred by Decree No. 1,918/09.

Early in October 2008, TGS received from UNIREN a proposal for such an
agreement (including the 20% initial tariff increase). In October 2011, TGS received a new proposal from UNIREN which was accepted by TGS, allowing UNIREN to initiate the relevant administrative procedure.

On April 7, 2014, the ENARGAS issued Resolution No. 2,852/14 defining the new tariff schedules that include an
increase in the rate applicable to the natural gas firm and interruptible transportation rates. The increase in the rate is set forth in three stages, as follows: 8% from April 1, 2014, 5.5% from June 1, 2014 and 5.3% from August 1,
2014, reaching from August 1, 2014, acumulative increase of 20%.

Additionally, Resolution
No. 2,852/14, established that at least 5% of the funds generated by this tariff increase must be temporarily deposited in a trust fund for the payment of maintenance works according to an investment plan submitted by TGS and previously
approved by the ENARGAS; and the balance of the increase will be managed by TGS for the fulfillment of that investment plan.

However, these measures only implement the 2008 provisional agreement in part. The 2008 provisional agreement is expected to remain in effect until a comprehensive renegotiation of the license with the
Argentine government is completed. TGS will continue performing all the legal actions to obtain the complete enforcement of the 2008 provisional agreement.

TGS Non-Regulated Businesses

In addition to the regulated segment of natural gas transportation, TGS is one of the leading
processors of natural gas and one of the largest traders of NGL in Argentina. NGL production and distribution involves the extraction of ethane, propane, butane, and natural gasoline from the gas flow that arrives to the General Cerri complex,
located near Bahía Blanca, in the Province of Buenos Aires, which is connected to TGSs main pipelines. TGS has two gas processing plants at the General Cerri complex: (1) an ethane, propane, butane and natural gasoline turbo
expander separating plant and (2) an absorption plant which extracts propane, butane and gasoline from the gas transported through TGSs pipeline system, with a gas processing capacity of 46 MMm3/d and a storage capacity of 54,840 tons. After extraction, TGS sells
these products in the domestic and international markets. TGS also stores and ships the products at facilities located in Puerto Galván. These activities are not regulated by ENARGAS.



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NGL production and distribution net revenues accounted for approximately
72%, 71% and 64% of TGSs net revenues in 2013, 2012 and 2011, respectively. TGSs operations benefited from rises in the international price of NGL and natural gasoline experienced during recent years, which permitted higher revenues
principally from exports. NGL production in 2013, 2012 and 2011 totalled 909,706 tons, 905,300 tons and 853,700 tons, respectively.

TGS currently sells its NGL exports to Petredec Limited under an export agreement that took effect on September 1, 2013, following a private bidding process that resulted in a significant improvement
for TGS in terms of prices. The contract provides for sales of approximately 105,800 short tons (a unit of weight equal to 2,000 pounds or 907.2 kilograms) of propane and 70,000 short tons of butane at the price quoted in Mont Belvieu, Texas, plus a
fixed charge per metric ton. The contract is scheduled to expire on April 30, 2014.

Ethane is sold to
PBB-Polisur S.A. (PBB), an Argentine polyethylene producer, under a ten-year agreement that will expire on December 31, 2015. The minimum volume of ethane that TGS has committed to sell to PBB is 370,373 short tons per year. The
price was initially fixed through December 31, 2007. Since then, at the beginning of each year the price has been subject to an annual adjustment based on various factors, including the producer price index (which variation cannot be higher
than 1% per year), the natural gas price, the quality of the ethane shipped by TGS and the transportation tariffs and charges. In 2008, the price was approximately 20% higher than the initial price and in 2009 the price increased 10% over the
2008 price. The prices for 2011 and 2010 each increased 8% per annum over the prior years price. In 2012, the price increased approximately 9% with respect to 2011. In 2013, the price increased approximately 11% with respect to 2012. TGS
is currently negotiating with PBB the price applicable for 2014.

Competition

TGSs gas transportation business, which provides an essential service in Argentina, faces only limited direct
competition. In view of the characteristics of the market in which TGS operates, it would be very difficult for a new entrant in the transportation market to pose a significant competitive threat to TGS, at least in the short to medium term. In the
longer term, the ability of new entrants to successfully enter TGSs market would depend on a favorable regulatory environment, an increasing and unsatisfied demand for gas by end users, and sufficient investment in gas transportation to
accommodate delivery capacity from the transportation systems.

On a day-to-day basis, TGS competes, to a
limited extent, with Transportadora de Gas del Norte S.A. for interruptible transportation services and for new firm transportation services made available as a result of expansion projects from the Neuquén basin to the greater Buenos Aires
area. Interruptible transportation services accounted for 10% of TGSs regulated business net revenues for 2013. The relative volumes of such services will depend mainly upon the specific arrangements between buyers and sellers of gas in such
areas, the perceived quality of services offered by the competing companies, and the applicable rate for each company.

With respect to NGL processing activities, TGS competes with Compañía MEGA S.A., which owns a gas processing plant in the Neuquén basin and has a processing capacity of approximately
36 MMm3/d. Our controlling company, Petrobras, has a 34%
interest in Compañía MEGA S.A.

Electricity

In the electricity business, we are active in generation and, to a lesser extent, in transmission activities, and are
positioned as a major player in the Argentine electricity market.

We conduct electricity generation
activities through the Genelba thermal power plant and the open cycle gas-fired turbine (Genelba Plus) in the Province of Buenos Aires, the Pichi Picún Leufú Hydroelectric Complex (HPPL) in the Comahue region,
on the Limay River, in the Province of Neuquén and the Ecoenergía thermal power plant (Ecoenergía) located in Bahía Blanca, in the Province of Buenos Aires. In addition, in the transmission business segment,
we hold an equity interest in Enecor S.A. (Enecor).

On January 30, 2013 we agreed to sell
our direct and indirect interest in Distrilec to Hidroeléctrica Piedra del Águila S.A. and La Plata Cogeneración S.A. for U.S.$35 million, thereby withdrawing from the electricity distribution business.

The Argentine Electricity Market

In the early 1990s, as part of a general state reform and privatization plan, the Argentine government carried out an overall restructuring of the electricity sector and allowed for greater private sector
participation. The Argentine electricity system had been characterized by the inability to meet short- and long-term demand and low service quality, with limited capacity on the part of the state to make necessary investments.

The regulatory framework and business environment changed in 2002, shifting to a greater role for the government in the
economy, including the electricity market.



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For the ten years prior to 2009, electricity demand in Argentina increased
at an average rate of 4.6% per annum, exceeding the growth in GDP for the period. However, during 2009, demand decreased mainly as a consequence of the drop in industrial activity levels and moderate temperatures during the year that resulted
in reduced consumption by the residential sector. In 2009, demand decreased 1.3% but recovered in 2010 growing 5.9%. During 2011, electricity demand increased at a rate of 5.2%. This positive variation was mainly driven by industrial consumption
throughout the year, accounting for 6.5% growth. Residential demand, in turn, also showed an increase of 5.2%. In 2012, demand continued to increase at a rate of 4.1%, thanks to the good performance shown by residential demand. In 2013, demand grew
3.3%, reaching 125,166 gigawatt hours (GWh), as a result of 5.3% growth in residential consumption and 0.4% in the industrial sector. In 2013, a new energy consumption record was reached. Supply to the system came from increased thermal
generation derived from the addition of new generation facilities, larger hydroelectric resources from extraordinary water volume in the Paraná and Uruguay rivers and the consumption of the system reserves. During this period, in the Comahue
basin, volumes of water remained below historical average values, which triggered an increase in the use of natural gas and liquid fuels.

Total electricity generation in Argentina during 2013, including imports and exports, totalled 129,660 GWh, out of which 64.1% was attributable to thermoelectric plants, 31.2% to hydroelectric plants,
4.4% to nuclear plants and 0.3% other sources.

Electricity Generation: Genelba, HPPL and Ecoenergía

Genelba is a 674 MW combined cycle gas-fired generating unit located at the central node of the
Argentine electricity network, in Marcos Paz, about 50 km away from the City of Buenos Aires. As part of our strategy to increase vertical integration, Genelba allows us to use approximately 100 million cubic feet of natural gas per day of our
own gas reserves.

Genelba, which commenced commercial operations in February 1999, has two gas-fired turbines
that receive gas through an 8 km duct connected to the transportation system operated by TGS. The electricity produced at Genelba is distributed via the national grid through a connection to the Ezeiza transforming station located only 1 km away
from Genelba.

The allocation of electricity dispatched to the wholesale electricity market (the
MEM), whether such electricity is produced under firm contracts or for the spot market, is subject to market rules based on the lowest variable cost of electricity generation. See Regulation of our BusinessArgentine
Regulatory FrameworkElectricity. Since Genelba uses combined cycle technology for a natural gas-fired power plant, our short-run variable cost is expected to be lower than the cost of most other thermoelectric power plants, granting
significant competitive advantages to Genelba. Therefore, CAMMESA is expected to dispatch Genelbas generating capacity before that of most other thermoelectric plants. Genelba stands out in the Argentine electricity market for its high
reliability and efficiency. The plant is recognized as one of the combined cycle electric power plants with the highest availability in Argentina.

During 2007, our board of directors (the Board of Directors) approved the construction of the new Genelba Plus open cycle gas-fired turbine. In 2009, we completed construction works in
connection with the new plant, which added 165 MW to the system. This thermoelectric plant is close to the existing Genelba plant and started its commercial operations in August 2009. We use this unit to meet increased demand for electricity from
our clients under supply agreements for large users in the MEM under the Energy Plus (Energía Plus) program (SE Resolution No. 1,281/06) .

During 2011, we completed the construction of Ecoenergías 14MW power plant, located at TGSs General Cerri complex and obtained authorization for commercial operations. Thereafter, in
2012, we obtained authorization to operate the plant under the Energy Plus Program.

We were awarded a 30-year
concession for hydroelectric power generation at HPPL beginning in August 1999. The complex has three electricity generating units with an installed capacity of 285 MW. Pursuant to our concession contract and applicable laws, as from August 2002 we
paid 1% in hydroelectric royalties, with scheduled annual increases of 1% per year until royalties reached a cap of 12%, based upon the tariff rate applied to block sales of the electricity sold. As of December 31, 2013, we paid the
maximum rate of hydroelectric royalties at a rate of 12%. In addition, we pay the Argentine government a monthly fee for the use of the water source amounting to 0.5% of the same amount used for the calculation of hydroelectric royalties.

During 2013, the Genelba thermoelectric plant generated 5,993 GWh of electricity, of which 4,974 GWh were
generated in combined cycle and 1,018 GWh were generated by the new Genelba Plus power plant. The combined generation by Genelba and Genelba Plus represented 5% of total power generation and 7% of thermal generation in Argentina during 2013.

The Genelba combined cycle and Genelba Plus gas turbine operated with a 93% and a 100% availability factor,
respectively, during 2013. The reliability factor was 95% for the combined cycle and 100% for the new Genelba Plus gas turbine.



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In addition, HPPL generated 926 GWh of electricity, with a 95.3%
availability factor and a 100% reliability factor. HPPL generated approximately 1% of total power generation in Argentina and 2% of total hydraulic generation in Argentina for 2013. The 926 GWh of electricity generated represented an increase of
42.5% in comparison to 2012.

During 2013, Genelba and HPPL together accounted for approximately 5.4% of the
power generated in Argentina. The operation of both generating units minimizes income volatility, capitalizing on the natural barriers existing among the different resources used for power generation.

During 2013, Ecoenergía had its first full year of operation under the Energy Plus regulatory framework.
Ecoenergías annual generation was 96 GWh, its availability factor of 93.1% and reliability factor of 96.4%.

The following chart details energy generation and sales figures for Genelba and HPPL for the fiscal years ended December 31, 2013, 2012 and 2011:



|                             |  |                         |       |  |      |  |       |      |  |  |       | 
|---------------------------- |  | ----------------------- | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                             |  | Year ended December 31, |      
|                             |  | 2013                    |       |  | 2012 |  |       | 2011 | 
|Power Generated (in GWh)     |  |                         | 7,015 |  |      |  | 7,070 |      |  |  | 6,284 | 
|                             |  |                         |      
|Power Sold (in GWh):         |  |                         |       |  |      |  |       |      |  |  |       | 
|Forward market               |  |                         | 2,023 |  |      |  | 3,025 |      |  |  | 2,921 | 
|Spot market                  |  |                         | 5,725 |  |      |  | 4,756 |      |  |  | 3,919 | 
|                             |  |                         |       |  |      |  |       |      |  |  |       | 
|Total sales                  |  |                         | 7,748 |  |      |  | 7,781 |      |  |  | 6,840 | 
|                             |  |                         |       |  |      |  |       |      |  |  |       | 
|Sales (in millions of pesos) |  |                         | 1,366 |  |      |  | 1,618 |      |  |  | 1,465 | 
|                             |  |                         |       |  |      |  |       |      |  |  |       | 

Electricity Transmission: Enecor

Enecor is an independent electricity transmission company. We own 69.99% of Enecor and Impregilo International
Infrastructures N.V. owns the remaining interest. Enecor has a 95-year concession, expiring in 2088, to construct, operate and maintain approximately 22 km of electricity lines and a 500 Kilovolt (Kv)/132 Kv transforming station in the
Province of Corrientes. Under the concession contract, 700,000 Class A shares of Enecor are pledged in favor of the Province of Corrientes.

Competition

We compete in both the spot and futures
markets, with competitors such as Endesa Costanera, Central Puerto, AES and the Pampa Group, among others. In addition, in the Gas Plus market, where most of our energy is sold under term contracts, we compete with the Pampa Group, Grupo Albanesi
and AES, among others.



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INSURANCE

Our insurance policy principally focuses on the concentration of risks and the importance and replacement value of
assets. Under our risk management policy, our principal assets, such as oil and gas facilities, refineries, petrochemical plants and power generation plants are insured for their replacement value.

We insure against material damages, control of wells (especially where we have gas production), and third-party
liability, including marine liabilities. Our reinsurers have ratings equal to or above A- from Standard & Poors, A3 from Moodys and/or B+ from A.M.Best. Insurance companies provide coverage in
each and every country where we have controlled interests, following terms and conditions given by our reinsurers. We maintain coverage for operational third-party liability with respect to our onshore and marine activities, including sudden
environmental risks such as oil spills (see Item 3. Key InformationRisk FactorsOur operations could cause environmental damage, and any changes in environmental laws may increase our operational costs). We carry third-party
liability insurance coverage of up to U.S.$125 million for each and every ocean marine and non-ocean marine incident of loss. We maintain control of wells coverage in many gas and oil fields located in Argentina and Bolivia. We also carry marine
cargo insurance and directors and officers insurance coverage. We also carry environmental guarantee insurance policies in accordance with Law No. 25,675 (the General Environmental Policy) for the following assets: the Bahía
Blanca refinery, the Galván port storage plant, the Dock Sud storage plant, the Avellaneda blending plant, the Genelba power generation plant, the Zárate petrochemicals plant and six gas stations located in the Province of Buenos
Aires. All projects and installations under construction are required to be insured in compliance with the contract for any damage and liability risk. We also carry insurance for workmens compensation and automobile liabilities.

Our main areas of coverage are subject to the following deductibles:



| |  |  | U.S.$10,000,000 for each and every loss for property damage for all our businesses;
| | - |  | -----------------------------------------------------------------------------------



| |  |  | U.S.$5,000,000 for control of wells; and
| | - |  | ----------------------------------------



| |  |  | U.S.$5,000,000 in ocean and non-ocean marine third-party liability.
| | - |  | -------------------------------------------------------------------

Our insurance decisions are based on our requirements and available commercial and market opportunities. Our facilities
are regularly subject to risk surveys undertaken by international risk consultants.



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PATENTS AND TRADEMARKS

Minor portions of our commercial activities are conducted under licenses granted by third parties. Royalties related to
sales associated with such commercial activities are paid under the relevant licenses. We use the name Petrobras with the permission of Petrobras.



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QUALITY, SAFETY, ENVIRONMENT AND HEALTH

PESA is a socially and environmentally responsible corporation that promotes continuous improvement of its health, safety
and environmental practices and policies. This commitment lies at the core of our corporate mission. We believe that caring for the environment in which we operate and for the safety and health of individuals is an essential condition for the
activities we develop.

Our Quality, Safety, Environment and Health (QSEH) policies incorporate
state-of-the-art concepts, including: eco-efficiency, life cycle, continuous improvement and leadership. This is implemented through the use of 15 guidelines and international standards for practical and customary action, each aimed at responsible
behavior-based development, in accordance with management system requirements.

We have complied with
international audits and certifications with respect to environmental management, quality, safety and occupational health.

Excellence in
Management

We continued to improve our management procedures by adopting an Excellence in Management
Program, which focuses on the principles of our corporate management manual based on the Brazilian National Quality Award, and the management evaluation program for safety, environment and health (the PAG-SMS Program).

The Excellence in Management Program provides a framework for the development of best practices and business
management measures, and identifies strengths and opportunities for the implementation of improvement plans focusing on excellence. Since 2008, we have been implementing pilot benchmark evaluations of management indicators to contribute to the
creation of a culture of excellence that integrates comparative information.

The PAG-SMS Program, started in
2004, verifies site adherence to the safety, environmental and occupational health policy (and its 15 corporate guidelines). This verification involves triennial evaluations conducted by specialized assistants from Petrobras system locations,
selected by our head office.

We also promoted transparent and integrated management processes, while
improving the efficiency of operations. PESA has implemented its standardization process, based on the SINPEP (Petrobras Electronic Integrated Standardization System) application software developed by Petrobras for all of its units
to facilitate the creation, implementation and improvement of standards for organizational process management. With the purpose of improving teamwork activities that contribute to efficient operations and improved results, we promoted an
Equipment Improvement initiative, to design a methodology that reduced spills and vents and accidents, upgraded injection systems and the reliability of loading and dispatch activities.

The Genelba Thermoelectric Power Plant received the National Quality Award granted by the national quality award
foundation (Fundación Premio Nacional de la Calidad) on account of three fundamental criteria: leadership, management systems and results.

During 2013, we improved our Management System through the successful completion of the Certifications Program under the ISO 9001, ISO 14001 and OHSAS 18001 standards. The Annual Certifications Program
includes internal and external audits on maintenance and re-certification of the management system as well as implementation of new certificates. It is a preventive activity that allows us to continue with management development according to
established strategic guidelines.

In addition, during 2013 we obtained the following certifications: Dock Sud
and Caleta Paula Terminals in Downstream, Punta Loyola Terminal in Exploration and Production, Energy Efficiency in Genelba and Healthy Workplace in the whole Company.

Safety

During 2013, the Company updated registers relating
to the identification and assessment of environmental impact and risk according to the relevant processes and projects.

To reduce the risk of accidents, a series of preventive measures have been developed. Indicators have shown an improvement in our related goals during 2013.

In connection with process safety initiatives, we continued developing qualitative and quantitative assessments of our
facilities and training, operational discipline and risk management practices.



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During 2013, PESA engaged in risk identification in electrical equipment and
facilities to identify any deviation from the AEA (Argentine Electrotechnical Association) standards, and revised fire networks using international standards, maintenance standardization and test of fire systems and vendor management.

PESA received the Annual Safety AwardDistribution segment form the IAPG (Argentinean Oil and Gas
Association) for our assessment of accident statistics and safety management.

As part of the planned training
activities, several training practices and workshops were performed in order to strengthen the basic concepts of the Comprehensive Management System on Safety, Environment and Occupational Health, focusing on the habitual use of supervision, a key
factor in the prevention of anomalies.

The Company moved forward with contingency management and assessment
improvement programs and with drills and training for emergency response to spills at gas stations, gas leaks and fire at Genelba Power Plant and spills in Neuquén at Rio Coyle.

Environment

Our operations are carried out prioritizing
QSEH-related matters within a sustainable development context. We are committed to minimizing our impact on the environment, and are developing a framework to assess and report on the eco-efficiency of all of our business units.
Eco-efficiency is based on the concept of creating more goods and services while using fewer resources and creating less waste and pollution.

Consistent with our strategic commitment to environmental responsibility, during 2013, we continued implementing projects with the purpose of minimizing QSEH-related risks at facilities. In addition, we
focused on approval and development of technical and economic feasibility studies for the exploration and drilling of non-conventional systems.

We are continuously working on and developing actions aimed at reducing accidental spill risks mainly under programs for ducts and tanks. As from 2013 the Company strengthened the Zero Spill program by
working out a plan with a strong commitment at the organizational level and with the purpose of preventing spills in all operations with a focus on three fundamental pillars: Management System, Facility Integrity and Contingencies.

We received a special recognition for Productive Innovation in the 2013 Integration Award granted by the Brazil Group for
works performed in connection with the Austral asset on Treatment of soils contaminated with hydrocarbons under adverse climate conditions through assisted bioremediation technique.

We continued with systematic environmental care awareness and promotion campaigns such as those performed for the
Environment Day, the Water Day and the Biodiversity Day.

Emergency Response

The Company is engaged in preventing, preparing for, and responding to emergency situations, with an emphasis on
minimizing damage and rapidly restoring previous conditions in the event of an accident. To that end, we carry out a plan of standardization and revision of contingency processes in our units.

We conduct land and nautical drills to develop the skills and competency needed to carry out our emergency plans in
different sectors involving the coordination of the activities of various parties to be called in an emergency. More than 1,450 individuals from the emergency-response community, including civil defense forces and firemen, have been trained in
techniques for reducing leaks and firefighting related to land transportation.

Since 2004, we organize
activities on handling of hazardous material emergencies relating to road transportation in several locations within the country, several of which activities culminate in road accident drills based on a range of different scenarios such as fire,
spills and human injuries.

During 2013, we continued forming and training response teams, and reinforcing the
training of several brigades in firefighting techniques and concepts and intervention protocols for rescues in confined spaces.

Health

Committed to promote the quality of life of its personnel, in 2013 PESA continued with its heart safe
program under the American Heart Associations international standards and with its certification as a smoke-free company through the Ministry of Health of the Republic of Argentina. In addition, it was recognized by the before mentioned
Ministry as a blood donation-friendly company on account of the implementation of campaigns for voluntary donation of blood in the different assets and as a Healthy Workplace.



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The Company continued with its Health Promotion and Protection Program,
which not only promotes physical activity and healthy diet habits of its employees but also works on the handling of stress and prevention of diseases and accidents. Within this framework, PESA continued offering its employees individual advice on
nutrition and smoking in all assets. During 2013, more than 1,200 employees participated in the different programs.

The Company also offered cardiopulmonary resuscitation and first aid training courses at all of its facilities for almost 1,000 employees. In addition, the Company continued with its physical activities
plan in which 1,500 employees participated, carried out flu and tetanus vaccination campaigns throughout the Company and continued with the health and physical activity program specially designed for Fire Brigades and the Travel Medicine program.

Concerning Occupational Health, measurements of the work environment and specific risk maps were completed
and follow-up of deviations was performed. The Company also continued with the ergonomics program involving the ergonomic survey of workplaces in all Company assets and specific training for the health team.

The alcohol and drug abuse program continued to be implemented through a new communication campaign for all employees in
addition to the performance of informative workshops.



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REGULATION OF OUR BUSINESS

Argentine Regulatory Framework

Petroleum

Overview

The Argentine oil and gas industry is regulated by Law No. 17,7319 (the Hydrocarbons Law), enacted in 1967, and natural gas is regulated by Law No. 24,076 (the Natural Gas
Law), enacted in 1992. The Hydrocarbons Law, which sets forth the general legal framework for the exploration and production of oil and gas, allows the Argentine government to establish a national policy for the development of Argentinas
hydrocarbon reserves, with the principal purpose of satisfying domestic demand.

Originally, the Hydrocarbons
Law provided that all oil and gas reserves located within the Argentine territory were owned by the Argentine government, but in 1992 a new regulatory framework was implemented in response to several changes in the Argentine oil and gas industry
after the privatization of Yacimientos Petrolíferos Fiscales Sociedad del Estado (now YPF) and Gas del Estado (GdE). In order to respond to these changes, Law No. 24,145 (the Privatization Law) was enacted.
Pursuant to the Privatization Law, the Argentine government transferred ownership of oil and gas reserves to the governments of the provinces where those reserves were located, upon satisfaction of certain conditions. Furthermore, pursuant to
section 124 of the Argentine Constitution, as amended in 1994, provinces were also granted primary control over natural resources existing in their respective territories. In 2007, Law No. 26,197 (the Federalization Law) amended the
Hydrocarbons Law to also provide that oil and gas areas belong either to (and should be administrated by) the Argentine government or the provinces, depending on the territory where the relevant areas are located.

Fields located in the area lying between 12 nautical miles from the coastline and the outer boundary of the continental
shelf belong to the Argentine government. All the fields lying within the various provinces or in offshore areas within twelve nautical miles of the coastline belong to the provinces or the City of Buenos Aires, as applicable. The Federalization Law
also divides authority over hydrocarbon transportation concessions between the Argentine government and the provinces, as discussed in detail below under Federalization Law.

As a result of the Federalization Law, all oil and gas exploration permits and production concessions, as well as other
types of exploration and/or production contracts with respect to the fields located in provincial territories, where originally granted by the Argentine government, were transferred to the relevant provinces by operation of law without affecting the
rights or obligations of permit or concession holders. Transportation concessions within provincial territories were also transferred to the relevant provinces.

The Hydrocarbons Law allows the Argentine government to establish national policies for the development of Argentine
reserves and to set out the federal energy policy. Provinces have the right to (i) control and conduct surveillance of permits, concessions and exploration and production agreements, (ii) enforce compliance with the terms and conditions of
permits, concessions and exploration and production agreements, (iii) approve the extension of the terms of permits, concessions and exploration and production agreements, and (iv) impose fees.

Following the enactment of the Federalization Law, several provinces (i.e., Chubut, Río Negro, La Pampa and
Mendoza) conducted public bidding processes for the granting of new exploration permits and, eventually, production concessions.

While privatized, the oil and gas industry still remains heavily regulated, particularly with respect to: the granting of exploration and production rights; strict control on exports; taxes and fees on
gross production; specific investment obligations relating to drilling activities; and other environmental controls and works.

On April 16, 2012, the Argentine government, through Decree No. 530/12, removed YPFs senior officers and empowered a government intervenor to take a position with YPF for a period of 30
days with immediate effect. On May 3, 2012 the Argentine Congress enacted Law No. 26,741 for the expropriation of 51% of YPFs Class D shares, out of the shares then held by Repsol YPF S.A. (Spain), and 51% of Repsol YPF GAS S.A.,
represented by 60% of its Class A shares then held by Repsol Butano S.A. (Spain). Additionally, Law No. 26,741 declares hydrocarbons self-sufficiency, production, industrialization, transport and marketing to be activities of public
interest and primary goals of Argentina, empowering the Argentine government to take the measures necessary to achieve such goals.

On July 27, 2012, Decree No. 1,277/12 repealed certain articles of Decrees Nos. 1,055/89, 1,212/89 and 1,589/89, as well as any other regulation that had provided for free disposal of
hydrocarbons.

Decree No. 1,277/12 also created the Commission under the supervision of the
Secretaría de Política Económica y Planificación del Desarrollo del Ministerio de Economía y Finanzas Públicas, as well as the Registro Nacional de Inversiones Hidrocarburíferas (the
Registry).



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Decree No. 1,277/12 set forth an obligation by the companies in the
Argentine oil and gas industry to submit to the Commission an annual plan on exploration and exploitation investments. The Commission is in turn mandated to design a National Hydrocarbon Investment Plan.

See Item 3. Key InformationRisk FactorsThe Argentine government has intervened in the oil and gas
industry in the past, and is likely to continue to intervene Limits on exports of hydrocarbons and related oil products have affected and may continue to affect our results of operations and Argentine oil and gas
production concessions and exploration permits are subject to certain conditions and may not be renewed or could be revoked.

Exploration and Production

Pursuant to the
Hydrocarbons Law, exploration and production of oil and gas are carried out though exploration permits, production concessions, production contracts or partnership agreements. Nevertheless, the Hydrocarbons Law permits surface reconnaissance of
territories not covered by exploration permits or production concessions, with the authorization of the SE and the permission of the owner of the land. Information obtained through surface reconnaissance must be provided to the office of the SE,
which is prohibited from disclosing such information for a period of two years without the prior authorization of the party that conducted the exploration, except in connection with the granting of exploration permits or production concessions.

The Hydrocarbons Law originally granted exploration permits and production concessions at the federal level
through a competitive bidding process. Since the enactment of the Federalization Law, this power is exercised by both the federal and provincial governments, as applicable. Companies and individuals seeking to obtain oil and gas permits and to
participate in concession bidding processes need to satisfy certain registration requirements with the SE. Permits granted to third parties in connection with the deregulation and de-monopolization process were granted in accordance with procedures
specified in certain decrees, known as the Oil Deregulation Decrees, issued by the Argentine government. In 1991, the Argentine government established a program under the Hydrocarbons Law, known as the Argentina Exploration
Plan, which remains in effect and pursuant to which exploration permits may be auctioned. The holder of an exploration permit has the exclusive right to perform the operations necessary or appropriate for the exploration of oil and gas within
the area specified by the permit. Each exploration permit may cover only unexplored areas up to 10,000 square kilometers in size (15,000 square kilometers for offshore exploration), and may have a term of up to 14 years (17 years for underwater
exploration).

In the event that holders of an exploration permit discover commercially exploitable quantities
of oil or gas, such holders will be entitled to obtain an exclusive concession for the production and exploitation of the relevant reserves. The production concession provides its holder the exclusive right to produce oil and gas from the area
covered by the concession for a term of 25 years (plus, in certain cases, a part of the unexpired portion of the underlying exploration permit), which may be extended by the relevant authority for an additional ten-year term. A production concession
also entitles the holder to obtain a transportation concession for the transport of the oil and gas produced.

Under the Hydrocarbons Law, holders of exploration permits and production concessions are required to carry out all
necessary works to find or extract hydrocarbons, using appropriate techniques, and to make the investments specified in their respective permits or concessions. In addition, holders must avoid damage to oil and gas fields and waste of hydrocarbons,
must undertake adequate measures to prevent accidents and damage to agricultural activities, the fishing industry, communications networks and ground water, and must comply with all applicable federal, provincial and local laws and regulations.
Failure by the holder of permits or concessions to make the relevant investments or take the measures required to avoid damages entitles the federal or provincial government who granted such permits or concessions to revoke or terminate them early,
as applicable. Recently, provincial governments have revoked concessions, including a concession held by the Company, arguing that concessionaires had failed to make the required investment. See Item 3. Key InformationRisk
FactorsArgentine oil and gas production concessions and exploration permits are subject to certain conditions and may not be renewed or could be revoked.

Holders of production concessions are required to pay for such concessions, and to make certain royalty payments to the
Argentine government. Please see Royalties below for more detail.

Exploration permits and
production or transportation concessions are subject to termination upon breach or violation of applicable laws, regulations, or permit or concessions terms, or upon the bankruptcy of the permit holder or concessionaire. In the event of the
expiration of exploration permits or production concessions, all oil and gas wells, operating and maintenance equipment and ancillary facilities automatically revert to the federal or provincial government, without compensation to the permit holder
or concessionaire.

Exploration permits and production concessions can be partially or totally assigned with
the prior authorization of the Argentine government.

No early termination is provided for under the
Hydrocarbon Law due to a change of control in a companys equity, although change of control clauses may be included under the relevant exploration permits or production concessions.



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Authorized Governmental Agency

The SE is the federal governmental agency in charge of enforcing the Hydrocarbons Law. However, the Argentine government
is in charge of determining areas in which hydrocarbons activities are to be encouraged and the granting of permits and concessions. Pursuant to the Federalization Law, each province has the authority to enforce the Hydrocarbons Law within its own
territory.

Pursuant to Decree No. 1,277/12, companies holding hydrocarbon concessions must submit to the
Commission an annual investment plan. The Commission shall then evaluate the annual investment plan, verifying its suitability with respect to the National Hydrocarbon Investment Plan. If it deems appropriate, the Commission may request the
submission of a new annual investment plan that more suitably conforms to the requirements of the National Hydrocarbon Investment Plan.

State-Owned Energy Company

In October 2004, the
Argentine Congress enacted Law No. 25,943 creating a new state-owned energy company called Energía Argentina S.A. (ENARSA). The corporate purpose of ENARSA is to carry out, through third parties or through joint ventures with
third parties, (i) studies, exploration and exploitation of natural hydrocarbon reserves, (ii) the transportation, processing and sale of hydrocarbons and their direct and indirect by-products, (iii) the transportation and
distribution of natural gas and (iv) the generation, transportation, distribution and sale of electricity. Moreover, Law No. 25,943 granted ENARSA all exploration concessions in respect of all national offshore areas located more than 12
nautical miles from the coastline, up to the outer boundary of the continental shelf, that were vacant at the time of the entry into force of the law on November 3, 2004. Therefore, any future exploration of offshore areas must be performed
jointly with ENARSA.

Net Worth Requirements

The Hydrocarbons Law requires that, to engage in any exploration, production or transportation activity in respect of oil
and gas, companies must comply with certain capital requirements and financial solvency standards.

SE
Resolution No. 193/03 states that, in order to receive and maintain permits or concessions, the permit holder or concessionaire must have a minimum net worth of Ps. 2 million, in the case of land areas, and Ps. 20 million, in the case
of offshore areas, and that such minimum net worth must be maintained for the entire term of the permit of concession. Non-compliance with this requirement may result in penalties, including fines or even removal from the register of oil companies
of the SE. Up to 70% of these net worth requirements may be satisfied by means of financial or other guarantees.

Federalization Law

The Federalization Law was published in the Official Gazette on January 3, 2007, and amended the Hydrocarbons Law to clarify the federal and provincial governments ownership rights over liquid
and gaseous hydrocarbon fields, based upon their location. As noted above, the Federalization Law transferred ownership of all hydrocarbon reservoirs that are onshore or within 12 nautical miles offshore to the provinces and the City of Buenos
Aires, and provided for Argentine government ownership of reservoirs more than 12 nautical miles offshore, until the outer limit of the continental shelf. Pursuant to the Federalization Law, the Argentine Congress shall continue to enact laws and
regulations to develop oil and gas resources existing within all of the Argentine territory (including marine resources), but the governments of the provinces where the hydrocarbon reservoirs are located shall be responsible for the enforcement of
these laws and regulations, and the administration of the hydrocarbon fields, and shall act as granting authorities for the exploration permits and production concessions. However, the administrative powers granted to the provinces shall be
exercised within the framework of the Hydrocarbons Law and the regulations complementing this law. Consequently, even though the Federalization Law established that the provinces shall be responsible for administering the hydrocarbon fields, the
Argentine Congress retained its power to issue rules and regulations regarding the oil and gas legal framework. Additionally, the Argentine government retained the power to determine national energy policies. It was expressly stated that the
transfer would not affect the rights and obligations of exploration permit and production concessionaires, or the basis for the calculation of royalties, which shall be calculated in accordance with the concession title and paid to the province
where the reservoirs are located. The Federalization Law provides that the Argentine government shall retain the authority to grant transportation concessions: (i) involving the territory of two or more provinces; and (ii) directly
connected to export pipelines for export purposes. Consequently, transportation concessions which are located within the territory of one province and which are not connected to export facilities have been transferred to the provinces.

Finally, the Federalization Law grants powers to the provinces to: (i) exercise in a complete and independent manner
all activities related to the supervision and control of the exploration permits and production concessions transferred by Law No. 26,197; (ii) enforce all applicable legal and/or contractual obligations regarding investments, rational
production and information and surface fee and royalties payment; (iii) establish the legal and contractual terms; (iv) apply the sanctions provided for in the Hydrocarbons Law; and (v) exercise all other authority as set forth by the
Hydrocarbons Law.



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As of the enactment of the Federalization Law on January 3, 2007, each
enforcement authority was made a counterparty to the different permits and concessions granted, with all the powers set forth in the Hydrocarbons Law, as amended and supplemented, and the rights derived therefrom.

On May 3, 2012, the Argentine Congress enacted Law No. 26,741, which declares hydrocarbons self-sufficiency,
production, industrialization, transport and marketing to be activities of public interest and primary goals of Argentina, and empowers the Argentine government to take the measures necessary to achieve such goals.

On July 15, 2013, the Argentine Government created the System of Investment Promotion Regime for the Exploitation of
Hydrocarbons by Decree No. 929/13 (Promotion Regime). Under the Promotion Regime, holders of exploration permits and/or concession rights registered in the National Registry of Hydrocarbon Investments may apply to be included in the
Promotion Regime, provided that they submit to the Commision an investment project a direct investment of at least U.S.$1 billion, to be invested in the first five (5) years of such project. The beneficiaries of the Promotion Regime will be
entitled to certain benefits, including, as from the fifth year of the start-up of their project, the right to freely trade in the foreign market twenty percent (20%) of the production of oil and gas produced in said project, at an export tax
rate of zero percent (0%). Additionally, the Promotion Regime provides that any exploitation concession confers the exclusive right to exploit deposits of conventional and unconventional hydrocarbons that exist in the areas covered by the respective
concession during the corresponding periods.

Resolution No. 9/13 of the Commission approved the
regulatory requirements and conditions for the submission and subsequent incorporation of Investment Projects for the exploitation of hydrocarbons under the Promotion Regime.

Transportation

The Hydrocarbons Law grants
hydrocarbon producers the right to obtain from the Argentine government a 35-year concession for the transportation of oil, gas and their by-products through public tender. Producers remain subject to the provisions of the Natural Gas Law and in
order to transport their hydrocarbons do not need to participate in public tenders. The term of a transportation concession may be extended for an additional ten years upon application to the Argentine government.

Transporters of hydrocarbons must comply with the provisions established by Decree No. 44/91, which implements and
regulates the Hydrocarbons Law as it relates to the transportation of hydrocarbons through oil pipelines, gas pipelines, multiple purpose pipelines and/or any other services provided by means of permanent and fixed installations for transportation,
loading, dispatching, tapping, compression, conditioning infrastructure and hydrocarbon processing. This decree is applicable to oil pipelines and not to gas pipelines. See Regulation of Our BusinessArgentine Regulatory
FrameworkNatural GasENARGAS.

The transportation concessionaire has the right to transport
oil, gas and petroleum products and to construct and operate oil pipelines and gas pipelines, storage facilities, pumping stations, compressor plants, roads, railways and other facilities and equipment necessary for the efficient operation of a
pipeline system. While the transportation concessionaire is obligated to transport hydrocarbons on a non-discriminatory basis on behalf of third parties for a fee, this obligation applies only if such producer has surplus capacity available and
after such producers own transportation requirements are satisfied.

Depending on whether gas or crude
oil is transported, tariffs are subject to approval by ENARGAS or the SE. SE Resolution No. 5/04 sets forth maximum amounts:



| |  |  | for tariffs on hydrocarbon transportation through oil pipelines and multiple purpose pipelines, as well as for tariffs on storage, use of buoys and
the handling of liquid hydrocarbons; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that may be deducted in connection with crude oil transportation by producers that, as of the date of the regulation, transport their production
through their own unregulated pipelines, for the purpose of assessing royalties.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Upon
expiration of a transportation concession, ownership of the pipelines and related facilities is transferred to the Argentine government with no compensation to the concessionaire.

Refining and Marketing

Decree No. 1,212/89, issued pursuant to the Hydrocarbons Law, regulates hydrocarbon-refining activities by oil producers and other third parties. This decree, as well as rules and regulations issued
by the SE, regulates the commercial, environmental, quality and safety aspects of refineries and gas stations. This decree authorized imports, abolished oil assignments by the SE and deregulated the installation of refineries and gas stations.
Certain supervisory and control powers of the SE have also been delegated to provincial and municipal authorities, and therefore the refining and sale of refined products must also comply with provincial and municipal technical, health, safety and
environmental regulations.



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In order to refine hydrocarbons, companies must register with the SE.
Registration is granted on the basis of financial, technical and other standards. As described below, liquid fuel retail outlets, points of sale for fuel fractioning, the resale to large users and supply contracts between gas stations and oil
companies are also subject to registration with the SE.

Also, gas stations and other fuel retailers and
distributors are required to register with the SE to participate in the liquid fuel markets. Severe sanctions are imposed on those who execute transactions with unregistered parties. Additional requirements are also imposed on all fuel market
participants, and brand owners are jointly liable for any breaches by companies operating under their brand name (pursuant to SE Resolution No. 1,102/04). Also, gas stations in border areas must sell fuels to vehicles bearing foreign license
places at mandatory differential prices (pursuant to SE Resolutions Nos. 938/06 and 959/06).

The Argentine
government has also imposed restrictions on exports, requiring producers to obtain authorization before performing export operations (pursuant to Decree No. 645/02 and SE Resolutions Nos. 1,679/04 and 1,338/06). Prior to obtaining the SEs
approval to export crude oil or diesel oil, producers must generally demonstrate that they have either satisfied local demand requirements or granted the domestic market the opportunity to purchase oil on similar terms. Potential exporters of diesel
oil must also register in advance with the government (pursuant to SEs Resolution No. 1,679/04).

In 2005, the Argentine government imposed additional requirements to guarantee the domestic supply of diesel oil to gas
stations by refiners (pursuant to SEs Resolutions Nos. 1,834/05 and 1,879/05). Initially, these regulations allowed gas stations to obtain diesel oil from third parties if refiners were unable to meet demand, with refiners bearing any
additional costs incurred in procurement. In 2006, regulations were introduced to require refining companies, wholesalers and retailers to meet total reasonable diesel oil demand on a continuous basis in every region in Argentina at the same level
demanded for the corresponding month in the previous year, plus an adjustment to account for growth in domestic product (pursuant to Secretary of Domestic Trade Resolution No. 25/06).

Provision No. 157/06 of the Argentine Undersecretary of Fuels provides that fuel sellers who are parties to
contracts creating any degree of exclusivity between the refining company and the fuel seller, which for any reason are seeking to terminate such contract, shall report the termination in advance to the Argentine Undersecretary of Fuels in order to
inform the Secretary of Domestic Trade. In that case, the Secretary of Domestic Trade must: (i) issue a statement regarding the validity of the termination of the contract and (ii) use all necessary means to allow the fuel seller
terminating the contract to execute another agreement with a refining company and/or fuel broker in order to guarantee its fuel supply.

The SE also regulates the quality content of fuels, through SE Resolution No. 1,283/06. This Resolution has been modified by SE Resolution No. 478/09, postponing the enforcement of some quality
specifications for certain kinds of fuels.

Any new fuels sold in Argentina must be authorized by the
Undersecretary of Fuels (pursuant to SE Resolution No. 1,334/06). In 2008, the SE exempted fuel oils sold to power plants from marketing quality requirements under SE Resolution No. 1,283/06 (pursuant to SE Resolution No. 150/08).

The SEs Resolution No. 1,103/04 provides, pursuant to Decree No. 1,212/89, section 17, that
in the case of gas stations operating under a brand, the brand owner under which fuels are sold shall be responsible for the specification, quality and quantity of products sold and for compliance thereof with reported requirements, and in the case
of gas stations operating under no brand, the operator shall be the responsible party and fuel suppliers may also be jointly and severally liable when identified.

The Ministry of Federal Planning created the Energía Total (Total Energy) program in 2007 to
help guarantee the supply of liquid and gas fuels to producers and to the Argentine population during 2008 (pursuant to Resolution No. 459/07). The program is designed to encourage the substitution of alternative fuels for natural gas and
electricity consumption used in various production activities, and for electricity generation. The program has since been extended. ENARSA is in charge of coordinating the Total Energy program, under which two separate plans call for the provision
of liquid and gas fuels. One goal of the program is to guarantee the supply of liquid fuels derived from oil (LPG, diesel, fuel oil, gasoline and octane enhancers) and to meet overall demand, based on economic growth and industrial development. The
beneficiaries of this plan are primarily fuel refining and importing companies in Argentina that qualify pursuant to regulations governing the Total Energy program and that have reached an agreement with ENARSA.

From January 1, 2010, as established by Law No. 26,093, Decree No. 109/07 and other regulations, all fuels
sold in Argentina must contain 5% of bioethanol blending in gasoline and biodiesel in diesel.

On
January 17, 2014, Resolution 1/14 of the Commission approved the Procedure for Light Crude Oil Imports, fixing the maximum quantities of light crude oil that may be imported by each market participant on the basis of idle refining
capacity, refinery complexity and domestic market share (market share) of gasoline and diesel. Resolution 1/14 further provides that the Commission will evaluate each import proposal submitted to it and determine actual import volumes to be assigned
to each importer, in accordance with the referenced maximum quantities.



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Market Regulation

Under the Hydrocarbons Law and certain decrees issued in connection with the deregulation and de-monopolization process
that took place in the early 1990s (the Oil Deregulation Decrees), holders of production concessions had the right, with a few limited exceptions, to freely dispose of their production either through sales in the domestic market or
through exports. However, since 2002, the Argentine government has imposed restrictions on the export of hydrocarbons under the Hydrocarbons Law. See Refining and Marketing above and Item 3. Key InformationRisk
Factors Factors Relating to ArgentinaLimits on exports of hydrocarbons and related oil products have affected and may continue to affect our results of operations.

In this context, Decree No. 1,277/12 repealed certain articles of Decrees Nos. 1,055/89, 1,212/89 and 1,589/89, as
well as any other regulation that had provided for free disposal of hydrocarbons.

Decree No. 1,277/12
also requires refining, marketing and transportation companies to submit to the Commission an annual investment plan. The Commission shall then evaluate the annual investment plan, verifying its suitability with respect to the National Hydrocarbon
Investment Plan, and shall audit the relevant companys ongoing fulfillment of its plan every three months.

Furthermore, Decree No. 1,277/12 prohibits primary and secondary refineries to discontinue supply due to programmed or unprogrammed shutdowns, scheduled maintenance programs or changes or
improvements in the refining processes, and empowers the Commission to apply the sanctions provided in Law No. 20,680, including, fines, forced temporary shutdowns, requisition of goods and products, and imprisonment, among others.

The Hydrocarbons Law authorizes the Argentine government to regulate the Argentine oil and gas markets and prohibits the
export of crude oil during any period in which the Argentine government finds domestic production to be insufficient to satisfy domestic demand. In the event that the Argentine government restricts the export of oil and petroleum products or the
free disposal of natural gas, the Oil Deregulation Decrees provide that producers, refiners and exporters shall receive a price, in the case of crude oil and petroleum products, not lower than that of similar imported crude oil and petroleum
products, and, in the case of natural gas, not less than 35% of the international price per cubic meter of Arabian light oil, at 34 degrees. See Refining and Marketing above.

Oil Plus and Refining Plus Programs

On November 25, 2008, the Argentine government issued Decree No. 2,014/08. This decree created two programs,
known as Oil Plus and Refining Plus. The principal purpose of these programs is to stimulate the exploration, production and exploitation of oil reserves, in order to increase refining capability and production of different types of fuels. According
to the decree, companies that fulfill requirements established by these programs will be awarded tax credits that are transferable and that can be applied against export taxes levied on exports of crude oil, natural gas and derivatives.

Also, pursuant to Decree No. 2,014/08, construction of infrastructure by oil companies to (i) enable the
exploration and production of new hydrocarbons reservoirs, (ii) increase production capacity or (iii) incorporate new technology for the operation of existing and new hydrocarbons reservoirs, may qualify as Obra de Insfraestructura
Crítica(Critical Infrastructure Construction) under Law No. 26,360, and the company may seek reimbursement of the value-added tax (VAT) corresponding to the assets involved in the infrastructure construction, or
accelerate the amortization of the same assets for the purpose of determining their income tax. Decree No. 2,014/08 is regulated by SE Resolution No. 1,312/08, which defines and quantifies the incentives to be awarded under these programs.
These incentives are awarded according to variables such as the international price of oil, the production volumes and the ratios of recovery of hydrocarbons reserves. Fiscal credits awarded under the Oil Plus program are subject to verification of
an increase in the production of oil and the incorporation of new reserves of hydrocarbons. Fiscal credits awarded under the Refining Plus program are contingent upon the existence of projects to install new refining units or the expansion of
existing units.

In 2012, the Argentine government announced the suspension of its Oil Plus and Refining Plus
programs, based on changes in the market conditions under which these programs were established in 2008.

SE
Resolution No. 1/13 repealed certain benefits recognized by Resolution No. 1,312/08, in particular those which had granted to exporting companies that satisfied certain requirements a tax credit of 12% of the difference between the
domestic price and the value of the international price applicable to such export.

Royalties

Pursuant to sections 57 and 58 of the Hydrocarbons Law, holders of exploration permits and production concessions must pay
an annual surface fee that is based on acreage of each block and which varies depending on the phase of the operation, (i.e., exploration or production), and in the case of exploration, depending on the relevant period of the exploration
permit. On October 17, 2007, Decree No. 1,454/07 significantly increased the amount of exploration and production surface fees expressed in Argentine pesos that are payable to the different jurisdictions where the hydrocarbon fields are
located.



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According to the Hydrocarbons Law, royalties equivalent to 12% of the
wellhead price of crude oil and natural gas are paid in Argentina, though a province may require the payment of a higher royalty rate upon renewal of a concession. The wellhead price is calculated by deducting freight and other sales-related
expenses from the sale prices obtained from transactions with third parties. The Hydrocarbons Law authorizes the government to reduce royalties by 5% based on the productivity and location of a well and other special conditions. Any oil and gas
produced by the holder of an exploration permit prior to the granting of a production concession is subject to the payment of a 15% royalty.

SE Resolution No. 435/04, which updated SE Resolution No. 155/92, (i) imposes additional reporting requirements with respect to royalties, (ii) introduces certain changes with respect
to the powers of provinces, (iii) amends certain parts of the royalty determination system, including applicable deductions and exchange rates, and (iv) establishes penalties upon default of a reporting duty. This resolution has been
applicable to permit holders and concessionaires since June 2004.

Concessionaires are required to file
monthly affidavits with the SE and the relevant provincial authorities, informing:



| |  |  | the quantity and quality of extracted hydrocarbons, including the computable production levels of liquid hydrocarbons and a breakdown of the crude
oil (by type), condensate and total natural gas recovered (with a 0.1% maximum error tolerance);
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | sales to domestic and foreign markets;
| | - |  | --------------------------------------



| |  |  | reference values for transfers made at no cost for purposes of further industrialization;
| | - |  | -----------------------------------------------------------------------------------------



| |  |  | freight costs from the location where marketable condition of a product is attained to the location where commercial transfer of the product takes
place; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | a description of sales executed during each month.
| | - |  | --------------------------------------------------

In addition to the affidavits, concessionaires must file receipts evidencing payment of royalties. Upon breach of any
reporting duty, provincial authorities are entitled to make their own assessment of royalties.

SE Resolution
No. 435/04 also provides that if a concessionaire allots crude oil production for further industrialization processes at its own or affiliated plants, the concessionaire is required to agree with provincial authorities and the SE, as
applicable, on the reference price to be used for the purpose of calculating royalties and payments. Upon failure by the concessionaire to agree this price, provincial authorities may fix this reference price. The concessionaire is eligible for
certain deductions, including (i) inter-jurisdictional freight costs, which can be deducted from the selling price, as long as transportation is made by means other than a pipeline, and monthly invoices and any relevant agreements are provided,
and (ii) internal treatment costs (not exceeding 1% of the payment) incurred by authorized permit holders or concessionaires.

Undersecretary of Fuels Provision No. 1/08 established that the cutoff value for crude oil obtained from bituminous minerals as established by Ministry of Economy Resolution No. 394/07,
equivalent to U.S.$ 42.00 per barrel, should be considered as the effective floor price on which to apply the positive quality adjustments for purposes of calculating the settlement of hydrocarbon royalties payable to the provinces.

By Decree No. 2,240/08, the Province of Neuquén approved the agreement signed with PESA for the extension of
its concessions, other than Sierra Chata, for an additional ten years, subject to the Companys agreement to pay to the Province an extraordinary exploitation right of 3% on its production of oil and gas in addition to the 12% annual royalty
payment previously described.

SE Resolution No. 813/10 ratified Undersecretary of Fuels Provision
No. 1/08 for purposes of the settlement of hydrocarbon royalties as from January 9, 2008.

Exchange Rates Applicable to Royalties

Under Resolution No. 76/02 of the Ministry of Economy, royalties on oil exports must be fixed taking into account the
offer exchange rate quoted by the Banco de la Nación Argentina on the day before the royalty is paid.

However, from December 2001 until May 2002, producers and refiners agreed to negotiate a reduced exchange rate in order
to moderate the impact of the Argentine peso devaluation on the price of the products. Producers calculated and paid royalties according to this reduced exchange rate. These calculations have been rejected by the Province of Neuquén, which
has presented a claim for any shortfall in royalty payments resulting from this agreement. This claim is still pending judgment by the Argentine Supreme Court.



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Regulations to Secure the Supply of Diesel

Over the past several years, the Argentine government has passed various laws and adopted various initiatives aimed at
guaranteeing the supply of diesel fuel to the domestic market.

One government initiative
aimed at securing local supply exempts diesel fuel imports intended for domestic consumption from the fuel liquids and natural gas tax, as well as the diesel oil tax. The following laws exempted diesel fuel imports in the following amounts from such
taxes: Law No. 26,022 (2005)  500,000 m3;
Law No. 26,074 (2006)  800,000 m3(subject
to an additional exemption of 20% in 2007); Law No. 26,337 (2007)  1,800,000 m3(applicable in 2008, subject to an additional exemption of 20%). Exemptions under Law No. 26,337 are valid when the average monthly parity of diesel oil imports is not lower than the ex-refinery
price of diesel oil (excluding all taxes except VAT). SE Resolution No. 151/08 has also applied these exemptions to the first 500,000 m3of diesel fuel imported each year.

The Argentine government has also undertaken initiatives aimed at securing the supply of diesel fuel at subsidized,
differential prices for regulated-rate public transportation service providers. Following Decree No. 675/03 (as amended by Decrees Nos. 159/04, 945/04, 280/05 and 564/05), several agreements were subsequently signed whereby refining companies
agreed to supply diesel oil at lower than market prices, depending on the kind of services provided by the transportation companies. Decree No. 449/08 empowered the Jefe de Gabinete(Chief of Cabinet) to sign annual agreements extending
the diesel fuel subsidy to transportation companies for the fiscal year 2008. As of the date of this Annual Report, such an agreement signed between the Company and the Chief of Cabinet pursuant to Decree No. 449/08 is still in effect.

In exchange for providing diesel fuel at below market prices, refining companies that entered into agreements
under Decree No. 449/08 had received direct compensation in the form of credit on export duties, equivalent to the difference between the net revenues from the sale of diesel oil at the subsidized price and the net revenues that would have been
obtained from the sale of the same diesel oil volumes at market prices. Refining companies that process crude oil they produce are entitled to direct compensation, calculated by deducting such compensation from any amount payable for export duties.
The applicable rate is determined by the Chief of Cabinet and the right to compensation is determined by the SE.

Stability of Fuel Prices

In an effort to mitigate the impact of the significant increase in international prices for oil and its by-products on domestic prices and to ensure price stability for crude oil, gasoline and diesel oil,
since January 2003, at the request of the Argentine government, hydrocarbon producers and refineries have entered into a series of temporary agreements, which contained price limits with respect to crude oil deliveries. By the end of 2004, in light
of increases in the WTI, the Argentine government established a series of measures to ensure the supply of crude oil to local refiners at price levels consistent with the local retail price of refined products.

Producers and refiners currently freely negotiate purchase and sale prices for oil.

Natural Gas

In 1992, the Natural Gas Act was passed, providing for the privatization of GdE and the deregulation of the price for natural gas. To carry out the privatization, the assets of GdE were divided among two
new transportation companies and eight new regional distribution companies. The transportation assets were divided into two systems on a geographical basis, the Northern and Southern pipeline systems, designed to give both systems access to gas
sources and to main centers of demand, including the Greater Buenos Aires region. A majority of the shares of each of the transportation and distribution companies was sold to private bidders.

The Natural Gas Act established a regulatory framework for the privatized industry and created ENARGAS, an autonomous
entity under the Ministry of Economy that is responsible for the regulation of the transportation, distribution, marketing and storage of natural gas.

Regulatory framework

Natural gas transportation and
distribution companies operate in an open access, non-discriminatory environment under which producers, large users and certain third parties, including distributors, are entitled to equal and open access to the transportation pipelines
and distribution systems. In addition, concessionaires may transport their own gas production pursuant to certain concessions granted under the Hydrocarbons Law.

The Natural Gas Act forbids gas transportation companies from buying and selling natural gas. Additionally, gas
producers, storage companies, distributors and consumers who contract directly with producers may not own a controlling interest (as defined in the Natural Gas Act) in a transportation company. Furthermore, gas producers, storage companies and
transporters may not own a controlling interest in a distribution company, and no seller of natural gas may own a controlling interest in a distribution or transportation company (unless such seller neither receives nor supplies more than 20% of the
gas received or transported, on a monthly basis, by the relevant distribution or transportation company).



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Contracts between affiliated companies engaged in different stages of the
natural gas industry must be reported to ENARGAS, which may only decline to authorize such contracts if it determines that they were not entered into on an arms length basis.

ENARGAS

ENARGAS is an autonomous entity which functions under the Ministry of Economy and is responsible for a wide variety of regulatory matters regarding the natural gas industry, including the approval and
adjustment of rates and transfers of controlling interests in the distribution and transportation companies. ENARGAS is governed by a board of directors composed of five full-time directors appointed by the Argentine government subject to
confirmation by the Argentine Congress.

On May 21, 2007 the Argentine government announced that it was
temporarily intervening in the operations of ENARGAS. Though the board of directors of ENARGAS continues to perform functions, as of the time of filing of this Annual Report, officials from the Argentine government currently exercise control over
ENARGAS in consultation with the board of directors. The Argentine government has not indicated the intended duration of this arrangement.

ENARGAS has its own budget, which must be included in the Argentine national budget and submitted to Congress for approval. ENARGAS is funded principally by annual control and inspection fees levied on
regulated entities in an amount equal to the approved budget, net of collected penalties, and allocated proportionately to each regulated entity.

Conflicts between regulated entities or between a regulated entity and a third party arising from the distribution, storage, transportation or marketing of natural gas must first be submitted to ENARGAS
for review. ENARGASs decisions may be appealed to the Ministry of Economy or to federal courts.

Rate Regulation

Summary

Since the enactment of the Public Emergency Law and other emergency measures in early 2002, the regulatory framework of public utility tariffs has been radically modified, including regulation of gas
transportation and distribution services. A patchwork of conflicting regulations is currently in effect. Although the general rules on tariffs described in this section remain in effect, in practice they have been supplemented by other laws
described throughout this Regulation of Our Business section. We cannot predict which rules and regulations will remain in place if and when conflicting regulations are revised.

Regulation of Natural Gas Distributors Prior to the Public Emergency Law

Prior to the enactment of the Public Emergency Law, provisions of the Natural Gas Act regulated the rates for gas
transportation and distribution services, including those of TGS. Tariffs to end-users consisted of the sum of three components: (i) the price of the gas purchased; (ii) a tariff for transporting gas from the production area through the
distribution system; and (iii) a distribution tariff. Under the Natural Gas Act and TGS license, TGS was permitted to adjust rates (i) semi-annually to reflect changes in the U.S. producer price index, and (ii) every five years in
accordance with efficiency and investment factors to be determined by ENARGAS. In addition, subject to ENARGASs approval, rates were subject to adjustment from time to time to reflect cost variations resulting from changes in the tax
regulations (other than income tax) applicable to TGS, and for objective, justifiable and non-recurring circumstances. The ratemaking methodology contemplated by the Natural Gas Act and the TGS license is the price-cap with periodic
review methodology, a type of incentive regulation designed to allow regulated companies to retain a portion of the economic benefits arising from efficiency gains. This legal framework remains in effect, though it has been modified by the
regulations described below.

UNIREN

The Public Emergency Law pesified tariffs for public utility services at a Ps. 1.00 = U.S. $1.00 parity and prohibited
tariff indexation. Additionally, it authorized the Argentine government to renegotiate public utility services contracts. This authority was later delegated by the Argentine government to the Ministry of Economy, which created, in July 2003, the
UNIREN, for the purpose of assisting in the renegotiation process. The renegotiation of service contracts (several of which are still ongoing) must take into account the following criteria, among others:



| |  |  | impact of tariffs on economic competitiveness and on income distribution;
| | - |  | -------------------------------------------------------------------------



| |  |  | quality of services to be provided and/or the capital expenditure programs provided for in the contracts;
| | - |  | ---------------------------------------------------------------------------------------------------------



| |  |  | interest of customers and accessibility to services;
| | - |  | ----------------------------------------------------



| |  |  | the safety of the systems; and
| | - |  | ------------------------------



| |  |  | the companys profitability.
| | - |  | ----------------------------



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On October 1, 2003, the Argentine Congress enacted a bill allowing the
Argentine government to set public utility rates until the completion of the renegotiation process. TGS is in the process of renegotiating a tariff structure with the UNIREN. See Gas and EnergyGas and
TransportationTGSTariff Renegotiation process.

Modifications to the regulatory framework

On February 16, 2004, the Argentine government, through Decree No. 180/04, modified the
regulatory framework for the Argentine gas industry. The decree authorized the SE to take any necessary measures to maintain an adequate level of services in the event of a supply crisis. In addition, Decree No. 180/04 provided for:



| |  |  | the creation of a trust fund (to be funded by tariffs payable by users of the service, special credit programs and contributions from direct
beneficiaries) to finance the expansion of the industry and the creation of an electronic market;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the creation of an electronic wholesale market to coordinate spot transactions for the sale of natural gas and secondary market
transactions for transportation and distribution of natural gas; and
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | a prohibition on distributors or their shareholders from having a controlling participation in more than one gas dealer.
| | - |  | ------------------------------------------------------------------------------------------------------------------------

On December 3, 2008, Decree No. 2,067/08 created the trust fund to ensure the
availability of natural gas imports as required to meet domestic supply needs.

On October 4, 2010,
ENARGAS Resolution No. 1,410/10 incorporated modifications to the mechanism for release of natural gas, mainly prioritizing demand corresponding for Residential consumers and CNG. Accordingly, each distributor may apply daily volumes
above the commitments Ministry of Federal Planning Resolution No. 599/07. ENARGAS Resolution No. 1,410/10 also enables carriers to reallocate volumes injected into the transportation system.

On November 14, 2011, ENARGAS Resolution No. 1,982/11 increased the amount to be received by the trust
fund created by Decree No. 2,067/08 as from December 2011, and expanded the customer base reached.

On
April 26, 2013, the Commission approved the general rules applicable to the Stimulus Program for Surplus Injection of Natural Gas (Programa de Estímulo a la Inyección Excedente de Gas Natural) by Resolution 3/13,
establishing a price of 7.50 US$/MMBTU for natural gas excess injection. Furthermore, on November 29, 2013, the Commission enacted Resolution 60/13 (later modified in March 2014, through Resolution No. 22/2014), which created the Stimulus
Program for Surplus Injection of Natural Gas for Businesses with Reduced Injection (Programa de Estímulo a la Inyección de Gas Natural para Empresas con Inyección Reducida).

Adjustment of Natural Gas Price at the Wellhead

Decree No. 181/04 instructed the SE to design a framework for the normalization of prices of natural gas at wellhead.
The decree authorized the SE to negotiate a price framework for the adjustment of prices in sales to distributors. Natural gas prices for residential consumers were excluded from this process. It also authorized the SE to create a new category of
users who must buy gas directly from producers.

Prices resulting from this framework are used as a reference
for calculating royalties and are used by ENARGAS in calculating any necessary adjustments in tariffs that result from variations in the price of gas. In addition, Decree No. 181/04 required that all agreements for the sale of natural gas be
filed with the electronic gas market, and granted authority to the SE to regulate the sale of gas (i) between producers and (ii) between producers and their associates.

Pursuant to Decree No. 181/04, in April 2004 the SE entered into an agreement with natural gas
producersapproved by SE Resolution No. 208/04 that regulated the price of natural gas by sector, and that called for the complete deregulation of the wellhead price of natural gas by January 1, 2007. Under the April 2004
agreement, natural gas producers were required to provide minimum supply volumes to the local market, including (i) distributors for industrial users, (ii) clients of distributors, or new direct consumers, and (iii) local electric
power generators. Additionally, this agreement called for producers to report all supply agreements to the SE.

In 2007, upon expiration of the 2004 agreement, the SE and the producers signed a new Natural Gas Producers
Agreement. This agreement modified the proposed scope of gas price deregulation, and established set prices, under which the 2005 price was maintained for the residential segment, and an annual average increase was to be established at
approximately 6.5% for the compressed natural gas, generation and industrial segments (though the price for gas in the industrial segment remained freely negotiable). The implementation of this agreement was staggered by segment and the last supply
commitment to expire was that for residential supply, on December 31, 2011.



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In 2008, the Argentine government introduced the Gas Plus
program to create an incentive for producers participating in the aforementioned supply agreements to increase production in unexploited areas, areas under exploitation with particular geologic characteristics (e.g., tight gas),
areas that had not been in production since 2004, or new fields in areas otherwise under production (pursuant to SE Resolution No. 24/08). Gas produced in these new areas is not subject to the same conditions imposed by the aforementioned
natural gas producers agreement, thus permitting more favorable pricing.

On
May 23, 2005, pursuant to SE Resolution No. 752/05, the SE established a mechanism by which new direct consumers were entitled to buy natural gas directly from producers as from August 1, 2005. SE Resolution No. 1,886/06
subsequently extended this mechanism through December 31, 2016. New direct consumers were allowed to buy natural gas in the electronic gas market, which was originally created for spot transactions but now permits long-term
operations. In order to purchase gas in the electronic market, new direct customers were required to post irrevocable purchase orders that provided for: (i) terms of at least 36 months, (ii) prices of at least export parity, and
(iii) volume of at least 1,000 m3per day.

If the irrevocable offer is not accepted, the SE may require export producers to provide natural gas for a
period of six months pursuant to the prices approved by Resolution No. 599/07 of the Ministry of Federal Planning. Transportation companies are prohibited from transporting natural gas for export purposes as long as the domestic supply of
natural gas is not satisfied.

Resolution No. 1/13 of the Commission creates a Stimulus Program for
Injection Natural Gas Surplus, pursuant to which beneficiary companies commit to increase the total volumes of natural gas injected into the domestic market during the proposed period, according to the values calculated in their respective
projects and approved by the Commission. Once the project is in effect, Resolution No. 1/13 provides for compensation for injection surplus and a penalty in the event that the applicable company, in any given period, has not increased
production consistent with its commitment.

Companies registered in the Registry created by Decree
No. 1,277/12 may submit applications for this Stimulus Program, subject to the terms and conditions for access established in the annex of Resolution No. 1/13 of the Commission. Companies that apply must indicate:



| | (i) | the calculation of base injection (natural gas volume proposed in connection with the project that the relevant starting point for calculation be
the surplus injection duties assumed by the company);
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | the duration of the project, which shall not exceed five years, renewable at the request of the company, upon decision of the Commission;
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------



| | (iii) | the calculation of adjusted basis injection (according to a rate of decline that will be calculated for each company in MMm3/d), for the proposed
period;
| | ----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iv) | the calculation of base price (weighted average price for the year 2012 from natural gas prices set for each consumer segment of the domestic
market);
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------



| | (v) | the calculation of the weighted average for each month of validity of Encouragement Program Injection Natural Gas Surplus of prices of
natural gas sold by the company, established for each consumer segment of the domestic market, which will be used to determine compensation.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The Commission may require the applying companies to provide additional clarifications as deemed necessary, as well as to adjust or modify all or part of the proposal submitted. The Commission will then
evaluate the project in question, considering the particular situation of each company, and whether the project meets the project objectives.

Resolution 3/13 of the Commission approved the general rules applicable to the Stimulus Program for Surplus Injection of Natural Gas (Programa de Estímulo a la Inyección Excedente de Gas
Natural). Under such program, producers were required to submit their projects for an increase in total natural Gas injection for a maximum period of five years, with a view to increasing production and achieving higher activity and employment
levels in the sector. A price of 7.50 US$/MMBTU was established for natural gas excess injection, with penalties involving LNG imports in the case of non-compliance with committed volumes. PESA submitted its project on a timely basis and is
currently discussing the terms of the project with the Commission.

Furthermore, the Commission enacted
Resolution 60/13 (later modified through Resolution No. 22/2014), which created the Stimulus Program for Surplus Injection of Natural Gas for Businesses with Reduced Injection (Programa de Estímulo a la Inyección de Gas Natural
para Empresas con Inyección Reducida). Under this program, producers are required to submit projects to increase natural gas production levels no later than April 30, 2014. Such program is directed to companies without previous
production or with a maximum production of 4 MMm3/d, with price incentives in the case of production increases and penalties involving LNG imports in the case of non-compliance with committed volumes. Moreover, companies eligible for this program
mentioned in the preceding paragraph and meeting the relevant requirements may request withdrawal from such program and admission in the current program.



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Restrictions on Gas Exports

In March 2004, the SE suspended all export authorizations and exports of natural gas surplus volumes and instructed the
Undersecretary of Fuels to create a program for the rationing of gas exports and the use of the countrys transport capacity. The Undersecretary of Fuels subsequently adopted a program, known as the Program for the Rationalization of
Natural Gas Exports, which established a mechanism for the determination of export restrictions based on various factors and contemplated monthly and quarterly limits on gas exports. In addition, during 2004, the Undersecretary of Fuels did
not authorize exports of volumes (excluding surplus volumes) in excess of those exported during 2003. This program was replaced in June 2004 with the Complementary Program to Supply Natural Gas to the Domestic Market, which eased the
monthly and quarterly limits established under the Program for the Rationalization of Natural Gas Exports.

From 2005 through 2008, as part of the Complementary Program to Supply Natural Gas to the Domestic Market, the SE
requested that producers redirect natural gas targeted for export to supply thermal plants and gas distribution companies. These measures restricted our total volume of exported gas by a daily average of approximately 31,000 cubic meters in 2008,
420,000 cubic meters in 2007, 339,000 cubic meters in 2006 and 110,000 cubic meters in 2005, preventing us from benefiting from the higher margins offered by the export market. See Item 3. Key InformationRisk FactorsFactors
Relating to ArgentinaLimits on exports of hydrocarbons and related oil products have affected and may continue to affect our results of operations.

Moreover, according to the Natural Gas Producers Agreement approved by Ministry of Federal Planning Resolution No. 599/07, the export of natural gas is prohibited as long as domestic supply is not
satisfied. A mechanism for the determination of export restrictions was also established.

The Public
Emergency Law created a withholding tax on exports of hydrocarbons for five years from March 1, 2002, which was subsequently extended for five years from January 2007 pursuant to Law No. 26,217. The taxes withheld are deducted from the
sales price of the exported hydrocarbons. In May 2004, a 20% withholding rate was imposed on gas exports. In July 2006, the Ministry of Economy increased the rate to 45% and instructed the customs administration to apply the price fixed by the
framework agreement between Argentina and Bolivia (approximately U.S.$6 per million British thermal units (MMBtu) in December 2007) as the reference price to calculate this tax, irrespective of the actual transaction price. In addition,
on October 10, 2006, the Ministry of Economy imposed prevalent export duties on exports from the Tierra del Fuego province, which were previously exempted from taxes. Moreover, in May 2007 the Ministry of Economy increased to 25% the export
duty on butane, propane and LPG.

Resolution No. 127/08 of the Ministry of Economy, effective
July 11, 2008, increased export duties on natural gas exports from 45% to 100%, establishing a valuation basis for the calculation of the duty as the highest price established in any contract of any Argentine importer for the import of gas
(including the reference price set by the framework agreement between Argentina and Bolivia). Resolution No. 127/08 provides with respect to LPG products that if the international price, as notified daily by the SE, is below the reference
price, the applicable export duty for such product will be 45%. If the international price exceeds the reference price, the producer shall be allowed to collect the maximum amount established for the relevant product, the balance being withheld by
the Argentine government as an export tax.

Compressed Natural Gas for Vehicles

Effective April 1, 2006, distributors cannot provide compressed natural gas, or CNG, to gas stations. Instead, gas
stations are required to purchase CNG in the electronic wholesale market pursuant to a mechanism of irrevocable purchase orders designed to conceal the identity of buyers and sellers, where buyers are able to make joint offers. If any purchase
orders are not satisfied through this system, exports of natural gas will be diverted to cover unsatisfied demand. This mechanism remains in force as of the date of this Annual Report and is expected to continue until the SE determines that it is no
longer necessary, in light of the status of the domestic supply of natural gas.

Liquefied Petroleum Gas

Prior to the enactment of Law No. 26,020 on April 8, 2005, the Argentine LPG market was
regulated by the Hydrocarbons Law and regulations issued by the Undersecretary of Fuels. Under Resolutions Nos. 49/01 and 52/01, the SE was responsible for enforcing the rules and regulations applicable to the LPG industry and an LPG board, which
reported to the National Refining and Marketing Board, which, in turn, reported to the Undersecretary of Fuels, was in charge of supervising and auditing the industry.

Law No. 26,020 established a new regulatory framework for the LPG industry. This new regime regulates the
production, fractioning, transportation, storage, distribution and sale of LPG. The SE is responsible for enforcement of Law No. 26,020, and may delegate supervision and control tasks to ENARGAS. The relevant portions of this law are summarized
below:



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| |  |  | Prices: the SE determines reference prices (which must be below export parity prices) for the domestic market (by region, on a seasonal basis every
six months), with the goal of securing regular supply in that market, and may establish price stabilization mechanisms to avoid domestic price fluctuations.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Market limitations: the SE and the CNDC are authorized to analyze the sector, for the purpose of fixing limits at each stage of vertical integration
of the industry.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Open Access: an open access regime is established in connection with the storage of LPG and the SE establishes terms and conditions for the
determination of maximum storage tariffs.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Imports/Exports: no restrictions are imposed and no prior authorization is required for the import of LPG, and the SE may authorize the export of
LPG without restriction, so long as domestic market demand is satisfied.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Trust Fund: a trust fund was established to subsidize the consumption of LPG by the low-income residential sector and expanding the distribution
network to areas without service. The trust is to be funded from the proceeds of sanctions collected under this law and contributions from the national budget.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Resolution No. 168/05 of the Undersecretary of Fuels extends the domestic supply and export restrictions applicable
to other hydrocarbons under SE Resolution No. 1,679/04 to LPG producers. However, as of the date of this Annual Report, domestic supply mandates and export restrictions have not been extended to the LPG market due to adequate domestic supply.

SE Resolution No. 792/05 set forth two seasonal periods (winter and summer), fixing reference prices for
each period. Additionally, it divided the country into three geographical areasNorth, Center and Southin which these prices are applied, as discussed above. It also approved a mechanism for the determination of the export parity price
and an exclusive price that applies to retailers only, calculated from an average of its purchases for the last 24-month period.

On October 1, 2008, SE Resolution No. 1,070/08 ratified the supplementary agreement between the SE and LPG producers for contributions to the trust fund created by Law No. 26,020.

On January 5, 2012, SE Resolution No. 112/11 approved the agreement setting the price of LPG.

Electricity

Until 1990, virtually all of the electricity supply in Argentina was controlled by the public sector. In 1991, the Argentine government undertook the privatization of state-owned electricity generation,
transmission and distribution companies. In January 1992, the Argentine Congress enacted Law No. 24,065 (the Regulatory Framework Law), which established guidelines for the restructuring and privatization of the electricity sector.
The Regulatory Framework Law, which continues to provide the framework for regulation of the electricity sector, distinguished the generation, transmission and distribution of electricity as separate businesses and subjected each to respective
regulatory regimes.

The ultimate objective of the privatization process was to reduce rates paid by users and
improve the quality of the electricity supply service through competition. The privatization process commenced in February 1992 with the sale of several large thermal generation facilities, and continued with the sale of transmission and
distribution facilities (including those currently operated by the Company) and additional thermoelectric and hydroelectric generation facilities.

The Public Emergency Law, combined with the devaluation of the peso and high rates of inflation, had a severe effect on public utilities in Argentina. Because public utilities were no longer able to
increase tariffs, inflation led to decreases in their revenues in real terms and a deterioration of their operating performance and financial condition. Most public utilities had also incurred large amounts of foreign currency indebtedness under the
Convertibility Law regime and, following the devaluation of the peso, the debt service burden of these companies increased sharply, which led many of them to suspend payments on their foreign currency debt in 2002. This situation caused many
Argentine electricity generators, transmission companies and distributors to defer making further investments in their networks. As a result, Argentine electricity market participants, particularly generators, are currently operating at near full
capacity, which could lead to insufficient supply to meet a growing national energy demand.

To address the
electricity crisis, the Argentine government has repeatedly intervened in and modified the rules of the MEM since 2002. These modifications include the imposition of caps on the prices paid by distributors for electricity power purchases (pursuant
to SE Resolution No. 8/02) and the requirement that all prices charged by generators be calculated based on the price of natural gas (which are also regulated by the Argentine government), regardless of the fuel actually used in generation
activities (pursuant to SE Resolution No. 240/03), which together have created a huge structural deficit in the operation of the MEM.

In December 2004, the Argentine government adopted new rules for the electricity market (pursuant to SE Resolutions Nos. 826/04 and 712/04), to come into effect once the construction of two new 800 MW
combined cycle generators had been completed. These two generators commenced commercial operations in open cycle during 2008 and in combined cycle during the first quarter of 2010. Construction was partially financed with credit balances of
generators resulting from the spread between the sales price of energy and generation variable cost,



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which are transferred to the Fondo Para Inversiones Necesarias que permitan Incrementar la Oferta de Energía Eléctrica en el Mercado Eléctrico Mayorista (the fund for
investments required to increase the electricity supply in the MEM, or FONINVEMEM).

Electricity
generators accepted the opportunity under the SEs Resolution No. 1,427/04 to participate in the FONINVEMEM projects. PESA contributed 35% of its credits accrued in the MEM during the 2004-2006 period for the construction of the combined
cycle generators mentioned above, and earned the right to be a shareholder in the companies in charge of these projects.

The construction of these new generators evidences a decision by the Argentine government to take a more active role in promoting energy investments in Argentina. In addition to these projects, in April
2006 the Argentine congress enacted a law that authorized the Argentine government to create a special fund to finance infrastructure improvements in the Argentine energy sector through the expansion of generation, distribution and transmission
infrastructure relating to natural gas, propane and electricity. Contributions to this fund are made through cargos específicos(specific charges) passed on to customers as an itemization on their energy bills.

In 2006 the SE implemented the Energy Plus Program (pursuant to SE Resolution No. 1,281/06) to create an incentive
for increased electricity generation. Projects implemented under the Energy Plus Program are not subject to market regulations regarding prices. Instead, prices can be freely negotiated between generators and users.

The Energy Plus Program seeks to increase electricity generation and satisfy domestic demand. For that purpose, CAMMESA
requires that all large users (those consuming more than 300 kW) purchase their incremental demand (any volumes exceeding their 2005 consumption) from new generators under the Energy Plus Program.

In addition, the Argentine Government has issued certain further regulations in this area. Through Decree
No. 140/07, it created the Rational and Efficient Electric Power Usage Program (PRONUREE), which consists of several measures to promote and raise public awareness about the need to make a rational and efficient use of electric
power. And through Law No. 26,350, it modified the official time zone for the summer period from December 30 to March 16, in order to promote a decrease in the use of electric power.

In order to increase the electric power supply, the Argentine Government has also established a program called Delivered
Electric Energy, through the supply of small transportable thermal plants and/or embarked power plants.

The
Argentine Government has additionally continued to implement various measures in order to regulate the operation of the MEM and of the intervening agents. The most recent of these measures is SE Resolution No. 95/13, whereby new values for the
remuneration of fixed and variable costs to be paid to generators, co-generators and self-generators for energy sales are set, and an additional remuneration is added. These values will not be applicable to bi-national hydroelectric power plants, to
nuclear generation or to generation committed to in contracts regulated by the SE, such as those under the Energy Plus Program. This resolution has temporarily suspended new contracts under the MEM Term Market, other than those regulated by the SE,
and it provides that upon the termination of existing contracts in the Term Market, large users must purchase their energy demand from CAMMESA. In addition, the resolution provides that commercial management and fuel delivery to the MEM plants will
be centralized in CAMMESA.

Regulatory authorities

The principal regulatory authorities responsible for the Argentine electricity market are:

(1) the SE of the Ministry of Federal Planning;

(2) the ENRE; and

(3) CAMMESA.

The SE advises the Argentine government on matters
related to the electricity sector and is responsible for the application of the policies concerning the Argentine electricity industry.

The ENRE is an autonomous agency created by the Regulatory Framework Law. The ENRE has a variety of regulatory and jurisdictional powers, including, among others:



| |  |  | enforcement of the Regulatory Framework Law and related regulations;
| | - |  | --------------------------------------------------------------------



| |  |  | control of the delivery of electric services and enforcement of the terms of concessions;
| | - |  | -----------------------------------------------------------------------------------------



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| |  |  | adoption of rules applicable to generators, transmitters, distributors, electricity users and other related parties concerning safety, technical
procedures, measurement and billing of electricity consumption, interruption and reconnection of supplies, third-party access to real estate used in the electricity industry and quality of services offered;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | prevention of anticompetitive, monopolistic and discriminatory conduct between participants in the electricity industry;
| | - |  | ------------------------------------------------------------------------------------------------------------------------



| |  |  | imposition of penalties for violations of concessions or other related regulations; and
| | - |  | ---------------------------------------------------------------------------------------



| |  |  | arbitration of conflicts between electricity sector participants.
| | - |  | -----------------------------------------------------------------

The ENRE is managed by a five-member board of directors appointed by the Argentine government. Two of these members are
nominated by the Consejo Federal de la Energía Eléctrica(Federal Council on Electricity, or the CFEE). The CFEE is funded with a percentage of revenues collected by CAMMESA for each MWh sold in the market. Sixty
percent of the funds received by the CFEE are reserved for the Fondo Subsidiario para Compensaciones Regionales de Tarifas a Usuarios Finales(regional tariff subsidy fund for end users), from which the CFEE makes distributions to provinces
that have met certain specified tariff provisions. The remaining forty percent are used for investments related to the development of electrical services in the interior of Argentina.

CAMMESA oversees the operation of the MEM. CAMMESA was created in July 1992 by the Argentine government, which currently
owns 20% of its capital stock. Various associations that represent MEM participants, including generators, transmitters, distributors, large users and electricity brokers, own the remaining 80%.

The Wholesale Electricity Market

Overview

The SE established the MEM in August 1991
to allow electricity generators, distributors and other agents to buy and sell electricity in spot transactions or under long-term supply contracts at prices determined by the forces of supply and demand.

The MEM consists of:



| |  |  | a term market in which generators, distributors and large users enter into long-term agreements on quantities, prices and conditions;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------



| |  |  | a spot market, in which prices are established on an hourly basis as a function of economic production costs, represented by the short-term marginal
cost of production measured at the Ezeiza 500 kV substation, the systems load center; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | a stabilization system for spot market prices applicable to purchases by distributors, which operates on a quarterly basis.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------

Operation of the MEM

In addition to having the responsibility of coordinating the dispatch operations in the MEM, CAMMESA is in charge of:



| |  |  | managing the SIN (as defined below) pursuant to the Regulatory Framework Law and related regulations, which includes:
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | determining technical and economic dispatch of electricity in the National Interconnection System (the SIN);
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | maximizing the systems security and the quality of electricity supplied;
| | - |  | -------------------------------------------------------------------------



| |  |  | minimizing wholesale prices in the spot market;
| | - |  | -----------------------------------------------



| |  |  | planning energy capacity needs and optimizing energy use pursuant to the rules set out from time to time by the SE; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------



| |  |  | monitoring the operation of the term market and administering the technical dispatch of electricity pursuant to any agreements entered into in such
market;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | acting as agent of the various MEM participants;
| | - |  | ------------------------------------------------



| |  |  | purchasing or selling electricity from or to other countries by performing the relevant import/export operations; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | providing consulting and other services related to these activities.
| | - |  | --------------------------------------------------------------------



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CAMMESAs operating costs are covered by mandatory contributions made
by MEM participants. CAMMESAs annual budget is subject to a mandatory cap equivalent to 0.85% of the aggregate amount of transactions in the MEM projected for that year.

MEM Participants

The main participants in the MEM
are generation, transmission and distribution companies. Large users and traders also participate in the MEM, but to a lesser extent.

Generators

As of December 31, 2013,
Argentinas installed power capacity was 31,139 MW. Of this amount, 61% was derived from thermal generation, 36% from hydraulic generation and 3% from nuclear generation.

Transmitters

Electricity is transmitted from power
generation facilities to distributors through high voltage power transmission systems. Transmitters do not purchase or sell electricity. Transmission services are governed by the Regulatory Framework Law and regulation issued by the SE.

In Argentina, transmission is carried at 500 kV, 220 kV and 132 kV through the SIN. The SIN consists primarily of
overhead lines and sub-stations and covers approximately 90% of the country. The majority of the SIN, including almost all of the 500 kV transmission lines, has been privatized and is owned by Transener. Regional transmission companies, most of
which have been privatized, own the remaining portion of the SIN. Supply points link the SIN to the distribution systems, and there are interconnections between the transmission systems of Argentina, Brazil, Uruguay and Paraguay allowing for the
import or export of electricity from one system to another.

Transmission companies also participate in
CAMMESA by appointing two acting and two alternate directors through the Asociación de Transportistas de Energía Eléctrica de la República Argentina(Argentine Association of Electric Power Transmitters, or
ATEERA).

Distributors

The largest distribution companies are EDESUR and Empresa Distribuidora y Comercializadora Norte S.A.

Each distributor supplies electricity to consumers and operates the related distribution network in a specified
geographic area pursuant to a concession. Each concession establishes, among other things, the area, quality of service required, rates paid by consumers for service and an obligation to satisfy demand. ENRE monitors compliance by federal
distributors with the provisions of their respective concessions and with the Regulatory Framework Law, and provides a mechanism for public hearings at which complaints against distributors can be heard and resolved. In turn, provincial regulatory
agencies monitor compliance by local distributors with their respective concessions and with local regulatory frameworks.

Distributors participate in CAMMESA by appointing two acting and two alternate directors through the Asociación de Distribuidoras de Energía Eléctrica de la República
Argentina(Argentine Association of Electric Power Distributors, or ADEERA).

Large users

The MEM classifies large users of energy into three categories: Grandes Usuarios Mayores(Major
Large Users, or GUMAs), Grandes Usuarios Menores (Minor Large Users, or GUMEs) and Grandes Usuarios Particulares(Particular Large Users, or GUPAs).

GUMAs are required to purchase 50% of their demand through supply contracts and the remainder in the spot market, while
GUMEs and GUPAs are required to purchase all of their demand through supply contracts.

Large users
participate in CAMMESA by appointing two acting and two alternate directors through the Asociación de Grandes Usuarios de Energía Eléctrica de la República Argentina(Argentine Association of Electric Power Large
Users, or AGUEERA).



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Traders

Since 1997, traders are authorized to participate in the MEM by intermediating block sales of energy. Currently, there are
eight authorized traders in the MEM, several of which conduct transactions with Comercializadora de Energía del Mercosur S.A. (CEMSA) in the export market.

Spot Market

Spot prices

The emergency regulations enacted after
the Argentine crisis in 2001 had significant impact on energy prices. Among the measures implemented were the pesification of prices in the MEM, known as the spot market, and the requirement that all spot prices be calculated based on the price of
natural gas, even in circumstances where alternative fuel such as diesel is purchased to meet demand due to the lack of supply of natural gas. Despite these modifications, the basic framework for the spot market that was established prior to the
economic crisis remains in place.

Under this system, energy prices in the spot market are set by CAMMESA,
which determines the price charged by generators for energy sold in the spot market of the MEM on an hourly basis. The spot price reflects supply and demand in the MEM at any given time, which CAMMESA determines using different supply and demand
scenarios that dispatch the optimum amount of available supply, taking into account the restrictions of the transmission grid, in such a way as to meet demand requirements while seeking to minimize the production cost and the cost associated with
reducing risk of system failure.

The spot price set by CAMMESA compensates generators according to the cost
of the last unit to be dispatched for the next unit as measured at the Ezeiza 500 Kv substation, which is the systems load center and is in close proximity to the City of Buenos Aires. Dispatch order is determined by plant efficiency and the
marginal cost of supply. In determining the spot price, CAMMESA also considers the different costs incurred by generators not in the vicinity of the City of Buenos Aires.

In addition to energy payments for actual output at the prevailing spot market prices, generators receive compensation
for capacity placed at the disposal of the spot market, including stand-by capacity, additional stand-by capacity (for system capacity shortages) and ancillary services (such as frequency regulation and voltage control).

Seasonal Prices

The regulations implemented in the wake of the Argentine economic crisis of 2001 also made significant changes to the seasonal prices charged to distributors in the MEM, including the implementation of a
cap (which varies depending on the category of customer) on the cost of electricity charged by CAMMESA to distributors at a price significantly below the spot price charged by generators.

Prior to implementation of the emergency regulations, seasonal prices were regulated by CAMMESA as follows:



| |  |  | prices charged by CAMMESA to distributors and large users changed only twice a year (in summer and winter), with interim quarterly revisions in case
of significant changes in the spot price of energy, despite prices charged by generators in the MEM fluctuating constantly;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | prices were determined by CAMMESA based on the average cost of providing one MW of additional energy (its marginal cost) and several other factors;
and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | CAMMESA would use seasonal database and optimization models in determining the seasonal prices and would consider both anticipated energy supplies
and demand as follows:
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | in determining supply, CAMMESA would consider energy supplies provided by generators based on their expected availability, committed imports of
electricity and the availability declared by generators;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | in determining demand, CAMMESA included the requirements of distributors and large users purchasing in the MEM as well as committed exports.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------

Stabilization Fund

The stabilization fund, managed by CAMMESA, absorbs the difference between purchases by distributors and large users at
seasonal prices and payments to generators for energy sales at spot prices. When the spot price is lower than the seasonal price, the stabilization fund increases, and when the spot price is higher than the seasonal price, the stabilization fund
decreases. The outstanding balance of this fund at any given time reflects the accumulation of differences between the seasonal price and the hourly energy price in the spot market. The stabilization fund is required to maintain a minimum amount to
cover payments to generators if prices in the spot market during the quarter exceed the seasonal price.



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Billing of all MEM transactions is performed monthly through CAMMESA, which
acts as the clearing agent for all purchases between participants in the market. Generally, payments to generators are made approximately 40 days after the end of each month by CAMMESA.

The stabilization fund was adversely affected as a result of the modifications to the spot price and the seasonal price
made by the emergency regulations, pursuant to which seasonal prices were set below spot prices, resulting in large deficits in the stabilization fund. This deficit has been financed by the Argentine government through loans to CAMMESA and by
generators through contributions to the FONINVEMEM.

Term market

Historically, generators were able to enter into agreements in the term market to supply energy and capacity to
distributors and large users. Distributors were able to purchase energy through agreements in the term market instead of purchasing energy in the spot market. Term agreements typically stipulated a price based on the spot price plus a margin. Prices
in the term market were at times lower than the seasonal price that distributors were required to pay in the spot market. However, as a result of the emergency regulations, spot prices are currently higher than seasonal prices, particularly with
respect to residential tariffs, making it unattractive to distributors to purchase energy under term contracts while prices remain at their current levels.

Argentine Taxation

General Overview

Holders of exploration permits and production concessions are subject to federal, provincial, and municipal taxes and
regular customs duties on imports. The Hydrocarbons Law grants such holders a legal guarantee against new taxes and certain tax increases at the provincial and municipal levels. Permit holders and concessionaires must pay an annual surface tax based
on the area held. Attempts by the Province of Neuquén to change the reference price used for calculating royalties are currently being challenged through litigation. For more detail on concession fees and royalties, see
Royalties above.

Oil and gas exploration and production activities in Argentina are subject
to the following taxes:



| |  |  | An annual surface tax based on the area held, which varies depending on the permit and concession terms.
| | - |  | --------------------------------------------------------------------------------------------------------



| |  |  | An income tax of 35% of net income.
| | - |  | -----------------------------------



| |  |  | A VAT of 21% for the domestic sale of oil and gas, which is passed on to purchasers (exports have a zero percent VAT).
| | - |  | ----------------------------------------------------------------------------------------------------------------------



| |  |  | A provincial tax, usually of 2% of gross domestic sales (exports are excluded).
| | - |  | -------------------------------------------------------------------------------



| |  |  | A national minimum income tax of 1% of the value of the assets that the company owns as of December 31 of each year. Certain assets, such as
shares and interests in other companies subject to the same tax, are exempt. Assets located in the jurisdiction of the Province of Tierra del Fuego are also exempt. The income tax paid as determined for the same economic year is considered to be
payment against this tax.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A provincial stamp tax applied to written agreements entered into within the provincial jurisdiction, at rates varying between 0.3% and 2.5% of the
economic value of the relevant agreement.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A withholding tax on crude exports, as described under Export Taxes below.
| | - |  | -----------------------------------------------------------------------------



| |  |  | A tax on debits and credits applicable to bank account transactions and other banking transactions used as a replacement for current accounts. The
generally applicable rate is 0.6% on each debit or credit transaction (although, in some cases, it increases to 1.2% or decreases to 0.075%).
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A tax on personal property that applies to the shares or other stakes of Argentine companies held by foreign companies or individuals, at a rate of
0.5% of the value of such assets.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A surveillance fee applicable to downstream activities and transportation of liquid hydrocarbons and their derivatives through pipelines, as
described under Surveillance Fee below.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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In addition, the net profit (as defined in the Hydrocarbons Law)
of holders of permits or concessions accruing from activity of such holders might be subject to the application of a special 55% income tax. This tax has never been applied, although each permit or concession granted after this tax came into place
provided that the holder thereof is subject to it. Although a decree of the Argentine government provides that we are subject to the general Argentine tax regime, our permits and concessions were granted prior to the entry in force of this tax and
this has never been enforced.

Following the introduction of market prices for downstream petroleum products
in connection with the deregulation of the petroleum industry, Law No. 23,966 established a volume-based tax on transfers of certain types of fuel, replacing the prior regime, which was based on the regulated price. Law No. 25,745
modified, effective as of August 2003, the mechanism for calculating this tax, replacing the old fixed value per liter according to the type of fuel with a percentage to apply to the sales price, maintaining the old fixed value as the minimum tax.

Dividends distributed by us to our shareholders, in excess of the Companys taxable accumulated income
for the previous fiscal year, whether in cash, property or other equity securities, and any other payment in kind, are subject to income tax withholding at the rate of 35% in respect of such excess (Equalization Tax). This is a final tax
and it is not applicable if dividends are paid in shares (acciones liberadas).

In addition, dividends
paid by us to our Argentine individual shareholders and undivided estates as well as to our foreign shareholders are subject to tax at a 10% rate. The 10% tax rate is calculated over the net dividend after giving effect to the Equalization Tax.

Holding of our shares by individuals resident in Argentina or abroad and corporations, any type of legal
entity, enterprise, permanent establishment, estate or resident abroad shall be subject to a personal assets tax on those holdings by December 31 every year. The tax basis shall be the percentage net equity of each shareholder, and the tax rate
is 0.5%. We act as a substitute obligor and pay the tax. The Argentine government is entitled to recover the amount paid through withholding or by foreclosing on the assets that generated the tax liability.

Export Taxes

In 2002, the Argentine government imposed customs duties on the export of hydrocarbons. Export tax rates on crude oil were increased to 20%, on butane, methane and LPG to 20%, and on gasoline and diesel
fuel to 5%. In May 2004, Resolution No. 337/04 of the Ministry of Economy increased export duties on crude oil to 25%. These export tax rates were increased again in 2004, when the Ministry of Economy issued Resolution No. 532/04,
establishing a progressive scheme of export duties for crude oil, with rates ranging from 25% to 45%, depending on the quotation of the WTI reference price at the time of the exportation. In addition, in May 2004, pursuant to Resolution
No. 645/04 of the Ministry of Economy, an export duty on natural gas and natural gas liquids was established at a rate of 20%. In July 2006, the Ministry of Economy increased the rate to 45% and instructed the customs administration to apply
the price fixed by the framework agreement between Argentina and Bolivia (approximately U.S.$6/mmBtu in December 2007) as the reference price to calculate this tax, irrespective of the actual transaction price. In addition, on October 10, 2006,
the Ministry of Economy imposed prevalent export duties on exports from the Tierra del Fuego province, which were previously exempted from taxes. Moreover, in May 2007 the Ministry of Economy increased to 25% the export duty on butane, propane and
LPG. There can be no assurance as to future levels of export taxes.

Resolution No. 394/07 of the
Ministry of Economy, effective as of November 16, 2007, increased export duties on Argentine exports of crude oil and other crude derivatives. This regime provided that when the international price exceeded the reference price, which was fixed
at U.S.$60.90 per barrel, the producer would be allowed to collect U.S.$42 per barrel, the remainder being withheld by the Argentine government as an export tax. If the international price of Argentine oil exports (as defined by the regulator) was
under the reference price but over U.S.$45 per barrel, a 45% withholding rate applied to all amounts over U.S.$45. If such price was under U.S.$45 per barrel, the applicable export tax was to be determined within 90 business days. A similar
withholding regime applied to exports of oil by-products such as gasoline, fuel oil and lube oils, with different cut-off and reference prices.

Resolution No. 127/08 of the Ministry of Economy, effective July 11, 2008, increased
export duties on natural gas exports from 45% to 100%, establishing a valuation basis for the calculation of the duty as the highest price established in any contract of any Argentine importer for the import of gas (including the reference price set
by the framework agreement between Argentina and Bolivia mentioned above). Resolution No. 127/08 of the Ministry of Economy provides with respect to LPG products (including butane, propane and blends thereof) that if the international price of
the relevant LPG product, as notified daily by the SE, is under the reference price established for such product in the resolution (U.S.$338/m3for propane, U.S.$393/m3for butane and U.S.$363/m3for blends of the two), the applicable export duty for such product will be 45%. If the international price exceeds the
reference price, the producer shall be allowed to collect the maximum amount established by the resolution for the relevant product (U.S.$223/m3for propane, U.S.$271/m3for butane and U.S.$250/m3for blends of the two), the balance being withheld by the Argentine government as an export tax.

On January 7, 2013, Resolution No. 1/13 of the Ministry of Economy modified Resolution No. 394/07.
According to Resolution No. 1/13, the after-tax revenues which the producer is allowed to collect were increased to U.S.$70 per exported barrel, as long as the international price of crude oil and other crude oil derivatives is greater than or
equal to U.S.$80 per barrel. If that price is lower, the applicable withholding rate will be 45%.



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Surveillance Fee

Law No. 25,565 imposed a surveillance fee payable to the SE for downstream activities, equal to Ps. 0.0003 for each
commercialized transaction in the domestic market, and for the transportation of liquid hydrocarbons and their derivatives through pipelines, at a 0.35% rate of the estimated income for the provision of transportation service.

Argentine Environmental Regulations

The environmental legal framework comprises Sections 41 and 43 of the Argentine Constitution, as well as federal, provincial and municipal laws. According to Section 41 of the Argentine Constitution,
the Argentine government legislates the minimum standards for protection of the environment, while the provinces and municipalities are responsible for establishing specific standards and implementing regulations. Please note that, in addition to
the regulations described below, certain other regulations may also apply depending on the location of the oil and gas reserves.

International Treaties

Argentina is a member state
to several international treaties concerning environmental matters that may impact our business. Argentina has undertaken several obligations in connection with the protection of the environment, the preservation of biological diversity and the
implementation of sustainable development.

Such treaties include: (i) the Basel Convention on the
Control of Transboundary Movements of Hazardous Waste and its Disposal (1989); (ii) the United Nations Framework Convention on Climate Change adopted in Rio de Janeiro (1992); (iii) the Montreal Protocol of Substances that Deplete the
Ozone Layer (1989); (iv) the Kyoto Protocol (a protocol to the United Nations Framework Convention on Climate Change) (1997); and (v) the Stockholm Agreement on Persistent Organic Polluting Agents (2001).

Federal Environmental Laws

In accordance with Section 41 of the Argentine Constitution, federal laws establishing minimum standards for environmental protection have been enacted. These laws provide a general framework for the
legislation to be enacted by local jurisdictions, which must satisfy the minimum standards contained therein.

General
Environmental Policy

The General Environmental Policy, enacted in November 2002, established minimum
standards for the protection of the environment, the preservation of biological diversity and sustainable development.

The main purpose of the General Environmental Policy is the promotion of the rational and sustainable use of natural resources and the establishment of procedures and mechanisms to minimize environmental
risks, prevent and mitigate environmental emergencies and redress damages caused by environmental pollution.

The General Environmental Policy requires that any work or activity capable of significantly degrading the environmental
or its components or which may adversely affect the quality of life, shall be subject to a prior environmental impact evaluation. All entities must provide information related to the environmental impact of their activities and this information
shall be publicly available, unless declared classified.

Entities carrying out activities dangerous for the
environment and ecosystems must take out insurance policies for the damages such activities may cause. Any person liable for environmental damages must take the actions necessary to restore the status quo ante,and where such restoration is
not possible, the indemnification determined by the courts shall be transferred to an environmental restoration fund for the execution of remedial action.

Specific Environmental Regulations of Oil and Gas Industries

SE Resolution No. 105/92 contains specific regulations and procedures for the protection of the environment during oil and gas exploration and exploitation.

During exploration, companies must prepare an environmental impact report to be filed with the SE, and no drilling
activity may be carried out before filing such environmental impact report. Once oil and gas fields are discovered, companies must prepare an environmental assessment report also to be filed with the SE. Thereafter, environmental reports are to be
filed with the SE on an annual basis.



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Integral Management of Industrial and Services Activities Wastes

Law No. 25,612 established minimum standards for environmental protection with respect to the integral management of
waste originated in industrial or service activities. It sets forth minimum environmental protection requirements for generation, handling, storage, transport, treatment and final disposal of the aforementioned wastes. It also maintains the
Argentine Constitutions prohibition on the importation, introduction, or transportation into the country, its airspace and seas, of any types of wastes from other countries.

In general terms, Law No. 25,612 sets a system of tort liability equivalent to that of Law No. 24,051 described
under Hazardous Wastebelow. Infringements of this law may be subject to warnings, fines, closure, suspension of activities for up to one year and definitive withdrawal of authorizations and registrations in the applicable
registers. In the case of legal entities, board members and managers may be held severally liable for such penalties.

Hazardous Waste

Law No. 24,051 regulates the generation, manipulation, transport, treatment and final disposition of hazardous wastes generated or located under federal jurisdiction or, if located in the territory
of a province, that could affect individuals or the environment in other provinces other than the one where they were generated, or when the sanitary measures adoption of which may become necessary have an economic impact making it advisable to
unify those measures throughout the country.

With respect to hazardous waste liability, hazardous waste is
considered to have inherent risk (a risky thing as contemplated by article 1,113 of the Argentine Civil Code), which means that the generator or handler of hazardous waste will only be exonerated from its liability to the extent it
proves the victims or third parties negligence or willful misconduct. The law establishes severe civil and criminal sanctions for infringers.

Air Pollution

Law No. 20,284 applies in
federal jurisdictions and in those provinces which have adopted the provisions of this law. It sets general principles for the treatment of potential sources of pollution. Enforcement of this law is vested in the respective national, provincial or
local health authorities.

Water Environmental Management

Law No. 25,688 sets minimum standards for the preservation of water, its exploitation and rational use. It defines
the different uses of waters and the need for obtaining a permit from the local authorities for its use.

Additionally, it provides that a federal enforcement agency shall determine: (i) maximum limits for contamination
and protection of aquifers, (ii) instructions for the refilling and protection of aquifers, and (iii) the fixing of parameters and environmental standards for the quality of waters.

PCB Elimination and Management

Law No. 25,670, enacted in October 2002, regulates the management and elimination of polychlorinated biphenyls (PCBs). It forbids the entry of PCBs and machines containing PCBs into
Argentina as well as the installation of machines containing PCBs. According to Law No. 25,670 the Argentine government is empowered to take all measures necessary to guarantee the prohibition of the production, commercialization and the entry
of PCBs into Argentina, as well as the elimination of the used PCBs and the decontamination and elimination of PCBs and machines containing PCBs within the terms provided therein.

Concealment and Money Laundering

Law No. 25,246 categorizes money laundering as a crime, which is defined as the exchange, transfer, management, sale or any other use of money or other assets obtained through a crime, by a person
who did not take part in such original crime, with the potential result that such original assets (or new assets resulting from such original assets) appear as if they have been obtained through legitimate means, provided that the aggregate value of
the assets involved exceeds in the aggregate (through one or more related transactions) Ps. 50,000.

Law
No. 25,246 assigns information and control duties to certain private sector entities, such as banks, agents, stock exchanges and insurance companies, according to the regulations of the Financial Information Unit, and for financial entities,
the Central Bank. These regulations apply to many Argentine companies, including us. These obligations consist mainly of maintaining internal policies and procedures aimed at preventing money laundering and financing of terrorism, especially through
the application of know your customer policies.



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Among other duties, each financial entity is required to establish a
control and money laundering prevention committee and to appoint a senior official responsible for money laundering prevention policies, who shall be in charge of centralizing and processing any information that the Central Bank and/or
the Financial Information Unit may require.

Furthermore, financial entities are required to report to the
Financial Information Unit any transaction that may be considered suspicious or unusual, which lacks economic or legal justification, or involves unjustified complexity. Financial entities must pay special attention to transactions arising from or
relating to jurisdictions included in the Central Banks list of non-cooperating jurisdictions. As of the date of this Annual Report, Myanmar is the only jurisdiction included in such list.

Law No. 25,246 has been amended by Laws Nos. 26,087 and 26,119.

Venezuelan Regulatory Framework

The Venezuelan state owns all hydrocarbon fields and has established methods for regulating the exploitation of hydrocarbons in Venezuelan fields that are different from those in Argentina.

The Gas Hydrocarbons Organic Law published on September 23, 1999 regulates the exploitation of free or
non-associated gas and the transport, distribution, collection, storage, industrialization, handling and internal and external sale of associated gas (gaseous hydrocarbon that is extracted jointly with crude oil) and free or non-associated gas
(hydrocarbon that is extracted from a field which does not contain crude oil), allowing private sector participation in these activities.

The Venezuelan Constitution, in force since December 1999, contains provisions related to petroleum activity, including Article 12, which states that oil fields are property of the Venezuelan state, and
Article 302, which reserves petroleum activity to the Venezuelan state. The Constitution gives PDVSA, a state-owned entity, responsibility for managing petroleum activity.

The Hydrocarbons Organic Law published on November 13, 2001 effectively reversed most prior related
legislation, except for the Gas Hydrocarbons Organic Law, and purported to grant ample opportunity for the private sector to participate in the industry, limiting the activities reserved to the Venezuelan state to primary activities (which include
exploration, extraction and initial transport and storage) and to the sale of crude oil and specific products.

The Hydrocarbons Organic Law regulates the exploration, exploitation, refining, industrialization, transport, storage,
sale and conservation of hydrocarbons and refined products. The law sets forth the following principles: (i) hydrocarbon fields are public property; (ii) hydrocarbon activities entail public utility and are of social interest; and
(iii) activities described in the law are subject to decisions of the Venezuelan state adopted in connection with international treaties.

The Performance of Hydrocarbon Related Activities

Primary activities expressly reserved by law to the Venezuelan state can only be performed by (i) the government of
Venezuela; (ii) wholly-owned state entities; or (iii) companies in which the Venezuelan state maintains direct control by owning at least fifty percent of the shares or quotas of capital stock. The sale of natural hydrocarbons and certain
specified by-products can only be performed by wholly-owned state entities. Installations and existing facilities dedicated to the refining of natural hydrocarbons in the country and to the transportation of products and gas are owned by the
Venezuelan state.

The National Assembly must grant approval to mixed-ownership companies before they can
operate. These entities must meet the following minimum conditions: (i) they must have a maximum duration of 25 years; (ii) they must provide information regarding location, orientation and extent of the area under operation;
(iii) all of their assets must be reserved and turned over to the Venezuelan state once the activity ends; and (iv) any dispute among their shareholders must be resolved through private negotiations or arbitration and shall be subject to
the laws of Venezuela.

Prior to April 2006, our interest in Venezuelan oil and gas fields was through
operating service agreements with PDVSA, which established the terms of our compensation for production activities and investments. These contracts were awarded during bidding rounds in 1994 and 1997. In 2005, the Venezuelan government announced
that these operating service agreements did not comply with the Hydrocarbons Organic Law and instructed the Ministry of Energy and Petroleum to commence negotiations with private operators to convert all operating agreements into mixed-ownership
companies where more than 50% of each field is state-owned. These negotiations were completed in March 2006, and as a result, all our operating service agreements were converted to mixed-ownership companies (empresas mixtas) in which the
Venezuelan government, through the Comisión Venezolana del Petróleo (the CVP), holds at least 60% of the share capital and private companies hold the remaining. The interests allocated to private companies were
determined on the basis of the value attributed to the different operating service agreements during the negotiations.



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The National Assembly has approved (i) the principal terms of the
conversion agreements and the form of organizational documents for the mixed-ownership companies; (ii) amendments to the Hydrocarbons Organic Law and certain tax laws to allow the mixed-ownership companies to sell their production of crude oil
to PDVSA and its associates and to qualify as exporters for VAT purposes; and (iii) the Law for Regulating the Participation of Private Entities in Primary Activities, which limits private company participation in primary activities in
Venezuela to participation through mixed-ownership companies.

Licenses and permits

A license from the Venezuelan Ministry of Energy and Mines is required to refine natural hydrocarbons, and permits from
this ministry are required for activities related to the processing or domestic sale of refined hydrocarbons.

Relevant
Tax Features

Income tax

Venezuelan income tax law imposes a tax at a rate of 50% on the net taxable income of persons involved in hydrocarbon
related activities, or activities related to the purchase or acquisition of hydrocarbons and by-products for export. These persons may be authorized to deduct from their income tax 8% of the value of new investments in fixed assets up to a maximum
amount equal to 2% of their annual income for the relevant fiscal year. Any excess may be used in the following three fiscal years. 4% of the value of certain investments in high waters may also be deducted. Accelerated amortization and depreciation
of fixed assets and direct or indirect expenses necessary for the drilling of oil wells is permitted.

Activities related to the export of extra-heavy hydrocarbons through vertically integrated projects or the exploration or
exportation of natural non-associated gas are subject to a 34% rate.

Contractors dedicated to exploration and
production activities under operating agreements with state companies are also subject to a 50% rate.

Value-Added Tax

Subject to certain exceptions, in particular for exporting companies, imports and local purchases of goods
and services are subject to VAT at a rate of 15%, with a limited number of goods and services subject to VAT at a rate of 8%.

Municipal taxes

Hydrocarbon activities are not subject to municipal taxes, as these taxes are exclusively reserved for the national government.

Income from contractors that have entered into operativing contracts with state companies for the rehabilitation of
marginal fields is generally subject to a municipal tax on gross income.

Royalties

Since January 2002, royalties on oil and gas production have been set at a rate of 30%.

Special Advantages and Contributions

Mixed-ownership companies are subject to the following special taxes: (i) 3.33% additional royalty on the hydrocarbons volume extracted under the concession and delivered to PDVSA; and (ii) an
amount equivalent to the difference, if any, between (a) 50% of the value of the hydrocarbons extracted under the concession and delivered to PDVSA each year, and (b) the aggregate of payments made by the mixed-ownership company to
Venezuela in connection with activities conducted by the company during such calendar year, as royalties applicable on hydrocarbons extracted (including the additional royalty indicated in the preceding item (i), income tax and any other tax or
contribution calculated on income (either gross or net income), and investments in endogenous development projects amounting to one percent (1%) of profit before taxes).

In 2008, the Venezuelan government enacted the Law of Special Contribution to Extraordinary Prices in the
Hydrocarbons International Market, introducing a special tax payable by companies exporting or transporting liquid hydrocarbons and oil by-products outside Venezuela, to be applied when the average price of the basket of Venezuelan liquid
hydrocarbons exceeded U.S.$70 per barrel.

In 2011, the abovementioned law was replaced, creating two special
contributions, one for extraordinary prices and another for exorbitant prices, to be applied to the difference between the price set forth by the Venezuelan national budget and the monthly average of international prices of
the basket of Venezuelan liquid hydrocarbons. In 2013, the Venezuelan government reformed the Decree No. 8,807/12, introducing modifications and updates the rates of these specials contributions. For the purposes of the law are considered exorbitant
prices those whose monthly average of international prices of the basket of Venezuelan liquid hydrocarbons exceed U.S.$80 per barrel. These special contributions are recorded by mixed-ownership companies as selling expenses in their financial
statements and negatively impact such mixed-ownership companies earnings.



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OPEC

Venezuela is a founding member of OPEC. In the past, PDVSA, under instructions from the Ministry of Energy and Mines, has
adjusted its own production to ensure that Venezuela complies with production quotas set by OPEC.

The
Venezuelan government has created a policy of strict compliance with the production quotas established by OPEC. Article 6 of the Hydrocarbons Organic Law requires all persons who perform activities regulated by the Hydrocarbons Organic Law to comply
with production cuts, such as those that may be set by OPEC. Hence any production cuts may directly affect private producers, contractors, PDVSA and mixed-ownership companies.

Exchange Controls

On February 5, 2003, the
Venezuelan government introduced exchange controls. These regulations state that companies established for the purpose of developing any of the activities described in the Hydrocarbons Organic Law may maintain accounts in currency other than the
currency of Venezuela in banking or similar institutions outside of Venezuela only for purposes of meeting their obligations outside Venezuela. The Central Bank of Venezuela must approve these accounts. Any other foreign currency generated by these
companies must be sold to the Central Bank of Venezuela. These companies cannot acquire foreign currency from the Central Bank of Venezuela to make foreign currency payments. These same exchange controls are applicable to mixed-ownership companies.

Additional Matters

Companies operating in the hydrocarbons sector in Venezuela that meet certain income thresholds are also required to contribute a percentage of gross income to scientific, technological and research
programs. Hydrocarbon companies operating as mixed-ownership companies are also required to contribute to social programs. Additionally, employers of more than 50 employees are required to contribute to social programs aimed at reducing drug
trafficking and substance abuse.

Bolivian Regulatory Framework

In Bolivia, the petroleum and gas industry is regulated by the System of Regulation by Sectors (the SIRESE),
which regulates, controls and supervises telecommunications, electricity, hydrocarbons, transportation and water activities, to ensure that they operate efficiently and protect the interests of users, service providers and the Bolivian state by
contributing to the development of the country. In May 2005, a new hydrocarbons law, Law No. 3,058, was enacted, which, among other things, significantly increased taxes for companies in the industry. The law imposed an 18% royalty and a 32%
direct tax on hydrocarbons applicable on 100% of production. These new taxes were imposed in addition to applicable taxes under existing Law No. 843.

In May 2006, the Bolivian government enacted Supreme Decree No. 28,701, which provided, among other things, for the nationalization of hydrocarbon resources in Bolivia. This decree mandated that as
of May 1, 2006, oil companies had to deliver all property related to hydrocarbon production for sale to the national operator, YPFB. In addition, this decree provided that the Bolivian state would recover full participation in the entire oil
and gas production chain and to that end provided for the nationalization of the shares of stock necessary for YPFB to have at least 50% plus one of the shares in a number of companies.



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ORGANIZATIONAL STRUCTURE

The following diagram illustrates the corporate organizational structure of PESA and its subsidiaries, as of the date of
this Annual Report:





LOGO

In addition to the companies included in this chart, we have holding companies in
Spain, Bolivia, the Cayman Islands, Bermuda and Argentina, which are not reflected in the chart. Some of our material subsidiaries and associates are held through such holding companies.



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The following diagram illustrates the ownership structure of PESA as of the
date of this Annual Report:



LOGO

PROPERTY, PLANT AND EQUIPMENT

PESA has freehold and leasehold interests in various countries in South America, but there is no specific interest that
is individually material to the Company. The majority of our property, consisting of oil and gas reserves, service stations, a refinery, petrochemicals plants, power plants, manufacturing facilities, power distribution systems, stock storage
facilities, pipelines, oil and gas wells, and corporate office buildings, is located in Argentina. As of the date of this Annual Report, we also have interests in crude oil and natural gas operations outside Argentina in Venezuela and Bolivia.

Item 4A. UNRESOLVED STAFF COMMENTS

None.



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Item 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS

The following discussion should be read in conjunction with, and is entirely qualified by reference to, our Audited
Consolidated Financial Statements and the notes to thereto. Our audited consolidated financial statements were prepared in accordance with IFRS as issued by the IASB. See Item 3. Key InformationSelected Financial DataPresentation
of Financial Information in accordance with IFRS.

ANALYSIS OF CONSOLIDATED RESULTS OF
OPERATIONS

OVERVIEW

PESA is a vertically integrated energy company engaged in:



| |  |  | oil and gas exploration and production;
| | - |  | ---------------------------------------



| |  |  | refining and distribution;
| | - |  | --------------------------



| |  |  | petrochemicals; and
| | - |  | -------------------



| |  |  | gas and energy.
| | - |  | ---------------

Our long-term strategy is to grow as a vertically integrated energy company in Argentina, while being a leader in profitability as well as social and environmental responsibility.

Our principal place of business has historically been Argentina, but as of December 31, 2013 we also had operations
in Venezuela, Bolivia, Ecuador and Mexico. Approximately 77% of our total assets, 99% of our sales, 90% of our combined crude oil and gas production and 86% of our proved oil and gas reserves were located in Argentina as of December 31, 2013.
Fluctuations in the Argentine economy and actions adopted by the Argentine government have had and will continue to have a significant effect on Argentine private sector entities, including us. See Item 3. Key InformationRisk
Factors.

Year to year fluctuations in our income are a result of a combination of factors, principally
including:



| |  |  | The volumes of crude oil, oil products and natural gas we produce and sell;
| | - |  | ---------------------------------------------------------------------------



| |  |  | Changes in international prices of crude oil and oil by-products, which are denominated in U.S. dollars;
| | - |  | --------------------------------------------------------------------------------------------------------



| |  |  | Fluctuations in the Argentine peso/U.S. dollar exchange rate;
| | - |  | -------------------------------------------------------------



| |  |  | Interest rates;
| | - |  | ---------------



| |  |  | Changes to our capital expenditures plan and the related depreciation expense;
| | - |  | ------------------------------------------------------------------------------



| |  |  | Price and export controls on crude oil and oil by-products imposed by the Argentine government; and
| | - |  | ---------------------------------------------------------------------------------------------------



| |  |  | Changes in other laws or regulations affecting our operations, including with respect to tax and environmental matters.
| | - |  | -----------------------------------------------------------------------------------------------------------------------



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FACTORS AFFECTING OUR CONSOLIDATED RESULTS OF OPERATIONS

(1) Argentine Economic Situation

Fluctuations in the Argentine economy have had and will continue to have a significant effect on Argentine private sector entities, including us. Specifically, we have been affected and might continue to
be affected by Argentine tax regulations, the value of the peso against foreign currencies, inflation, interest rates, and the general political, social and economic environment in and affecting Argentina.

(a) Value of the Peso Against Foreign Currencies

As of December 31, 2013, the peso-U.S. dollar rate of exchange was Ps. 6.49 per U.S. dollar, compared to Ps. 4.91 and
Ps. 4.30 per U.S. dollar as of December 31, 2012 and 2011, respectively.

As of December 31,
2013, 2012 and 2011, a significant portion of our financial debt was denominated in U.S. dollars. This situation exposes the Company to risks associated with the exchange rate. However, the impact on our results of operations derived from variations
in the exchange rate related to our financial debt over such periods was partially mitigated by certain financial assets maintained in U.S. dollars and by net investments in foreign operations denominated in foreign currency, which are disclosed in
Shareholders Equity under Other Comprehensive Income in the Consolidated Statement of Comprehensive Income.

Accordingly, the exchange differences for fiscal years 2013, 2012 and 2011 accounted for gains of Ps. 171 million, Ps. 138 million and Ps. 91 million, respectively.

In January 2014, the peso lost approximately 24% of its value with respect to the US Dollar. Since January 2014, the
Argentine Central Bank has substantially increased domestic interest rates (the BADLAR rate stood at 26.5% p.a. as of March 31, 2014).

See Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaEconomic and political instability in Argentina has affected and may continue to adversely affect our financial
condition and results of operations. and Fluctuations in the value of the peso could adversely affect the Argentine economy, our results of operations or financial condition.

(b) Inflation

Historically, the Argentine economy has exhibited significant volatility, characterized by periods of high inflation.

In accordance with IFRS, the financial information set forth below has not been adjusted to reflect inflation since the
date of our IFRS transition, which is January 1, 2009.

In 2013, 2012 and 2011, the Argentine consumer
price index, according to statistics prepared by the INDEC, reflected inflation of 10.9%, 10.8% and 9.5%, respectively, and the Argentine wholesale price index rose 14.7%, 13.1% and 12.7%, respectively, during such years, also according to the
INDEC.

On February 13, 2014 the INDEC released a new inflation index that measures prices on goods
across the country and replaces the previous index that only measured inflation in the urban sprawl of the City of Buenos Aires. Under the new methodology, the January, February and March 2014 consumer price index rose 3.7%, 3.4% and 2.6%,
respectively. The IMF has reacted cautiously to the new index, declaring that it will review Argentinas reports on progress in revising its inflation and gross domestic product statistics later in 2014.

Sustained inflation in Argentina, without a corresponding increase in the price of products sold by us in the domestic
market, would have an adverse effect on our results of operations and financial position. Inflation could also adversely affect comparability among the different periods presented herein. See Item 3. Key InformationSelected Financial
DataConsideration of the effects of inflation and Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaEconomic and political instability in Argentina has affected and may continue to adversely affect
our financial condition and results of operations.

(2) Regulation of the Energy Industry in Argentina

Over the past several years, except for the period that followed the global financial crisis in the third quarter of 2008,
commodity prices of hydrocarbon products experienced an extended period of sustained increases. The Argentine government imposed a series of regulations, particularly focused on the energy sector, aimed at reducing the impact of inflationary
pressures from such high prices and seeking to ensure energy supplies to the domestic market.



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The level of government intervention in the economy may continue or
increase, which may affect Argentinas economy and, in turn, our business, results of operations and financial condition. See Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaGovernment intervention in the
Argentine economy could adversely affect our results of operations or financial condition.

(a) Natural Gas

In 2007, the Argentine government and producers signed a new Natural Gas Producers Agreement, the main
goals of which were to ensure sufficient supply to meet the domestic demand for gas, and to aid the gradual recovery in prices in all market segments.

As regards the first goal, the agreement established domestic market supply commitments for each producer. The agreement was approved by SE Resolution No. 599/07 and provided for successive
maturities for each segment, with the residential supply commitment expiring last, in 2011. As a result, each segments market share was uniformly distributed among producers and regulated prices remained low for the above mentioned segments.

In addition, the above resolution established that natural gas producers commitments to supply the CNG
and power plant market segments would terminate on December 31, 2009. However, the SE unilaterally extended such supply commitments, which remain in force.

As regards the gradual recovery in prices, the power plant segment experienced the highest increase. In the case of the
residential segment, however, prices did not increase significantly.

With respect to the CNG segment, in
August 2012 the SE, through Resolution No. 1,445/12, set a new price relating to natural gas for CNG services of Ps. 0.4945 per cubic meter, representing an increase of approximately 300%, and provided for the investment of the additional
resources obtained in the development of conventional gas resources.

Concerning SE Resolution
No. 599/07, which expired on December 31, 2011, the SE issued Resolution No. 172/11 dated December 29, 2011, providing for the provisional extension of the gas allocation rules set forth under SE Resolution No. 599/07 until
substitute measures are adopted. Accordingly, PESA continues as of the date of this Annual Report to be subject to the same supply commitments with respect to the various Argentine market segments.

In January 2007, through SE Resolution No. 1,886/07, the SE confirmed that hydrocarbon exports are contingent upon
adequate satisfaction of domestic demand and export sales have to be authorized on a case-by-case basis by the Argentine government. See Item 3. Key InformationRisk FactorsFactors Relating to Our BusinessLimits on exports of
hydrocarbons and related oil products have affected and may continue to affect our results of operations.

Within the scope of the long-term gas supply agreements entered into between the governments of Argentina and Bolivia
whereby a gas price of U.S. dollars 5/MMBtu was initially established, subject to adjustment pursuant to a formula based on international reference prices for gas and its by-products, gas imports were placed under the responsibility of ENARSA. In
order to avoid the impact of the price increase on domestic consumers, the Argentine government required that the increase in import gas prices be passed through to exports, through an increase in withholding taxes.

In September 2008, through SE Resolution No. 1,070/08, the Argentine government approved an agreement with natural
gas producers for a reduction in the price of 10 kg butane cylinders. This agreement resulted in an increase in natural gas prices of 15% for residential users, 8% for CNG and 13% for electricity generation. The reduction in the LPG sales price is
financed with contributions by producers, originally equivalent to 65% of the price increase resulting from the above resolution, and subsequently equivalent to 100% of such price increase as from December 2008. Under SE Resolution
No. 1,417/08, an 80% increase was imposed on the price applicable to a sector of the R3 residential segment as from November 2008. The Natural Gas Producers Supplementary Agreement approved by SE Resolution No. 1,070/08 was renewed for
2010, 2011, 2012 and 2013. At the end of 2013, a Fifth Addendum to this Agreement was signed, extending its validity through 2014.

In addition, a trust fund was created (pursuant to Decree No. 2,067/08) to cover natural gas imports required to secure supply of the domestic market. The resulting expenses are borne by users of the
regulated transportation and/or distribution services, by natural gas processing companies and by gas consumers receiving gas directly from producers without using natural gas transportation or distribution systems.

In August 2009, the Argentine government and natural gas producers signed a social peace agreement, which
provided that such companies should maintain production activity levels in exchange for an increase in the wellhead price of natural gas for the power plant segment, which would result in a 30% increase in such price.

In October 2010, through ENARGAS Resolution I-1,410, the natural gas delivery method was modified, placing a priority on
supply to meet the residential and CNG segments demand. As a result, each distribution company was able to request volumes on a daily basis above committed volumes under the Natural Gas Producers Agreement (pursuant to SE Resolution
No. 599/07). This resolution implied delivering a higher volume to meet the prioritized demand.



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In November 2011, through ENARGAS Resolution No. 1,982, the amount to
be received by the trust fund created under Decree No. 2,067/08 was increased as against December 2011 consumptions levels, and the consumer base falling within the scope of the resolution was broadened. Subsequently, ENARGAS Resolution
No. 1,991 addressed large consumers falling within the scope of such resolution and provided for a method pursuant to which to request exclusion, if applicable. Consumption of natural gas at the Bahía Blanca refinery in connection with
oil refining activities, and at the Cóndor and Barda Las Vegas plants, in Santa Cruz, in connection with natural gas processing, fell within the scope of the above resolution.

Law 26,741, which was passed in May 2012, declared the achievement of self-sufficiency in hydrocarbons supply and the
activities of exploration, exploitation, industrialization, transportation and marketing of hydrocarbons to be of public interest. In addition, YPF S.A.s and Repsol YPF Gas S.A.s net assets were declared of public interest and
Repsols interests in those entities became subject to expropriation up to fifty one per cent (51%) of total equity.

By means of Decree No. 1,277/12, which was passed in July 2012, the Argentine government approved the regulations for the implementation of Law 26,741 and issued the Rules of the Argentine
Hydrocarbons Sovereignty regime. These rules provide for the development of a National Hydrocarbons Investment Plan with the stated goals of maximizing investment and ensuring sustainability of related activities in the short, medium and long term.
In addition, Decree No. 1,277/12 abrogated certain sections of Decrees 1,055/89, 1,212/89 and 1,589/89 that had provided for the free availability of hydrocarbons produced in granted concession areas, free commercialization of hydrocarbons
products in the domestic and foreign markets, and the freedom to set prices. As of the date of this Annual Report, the Company has complied with all applicable reporting requirements set forth in Decree No. 1,277/12.

In February 2013, the Commission issued Resolution No. 1/2013 establishing the Stimulus Program for Surplus
Injection of Natural Gas. Under such program, producers were required to submit their projects for an increase in total natural gas injection for a maximum period of five years, with a view to increasing production and achieving higher activity and
employment levels in the sector. A price of 7.50 US$/MMBTU was established for natural gas excess injection, with penalties involving LNG imports in the case of non-compliance with committed volumes. PESA submitted its Project on a timely basis and
is currently discussing the terms of the Project with the Commission.

In turn, in November 2013, through
Resolution No. 60/2013 (later modified in March 2014, through Resolution No. 22/2014), the Commission created the Natural Gas Injection Incentive Program for Companies with Reduced Injection. Producers are required to submit projects to
increase natural gas production levels no later than April 30, 2014. Such program is directed to companies without previous production or with a maximum production of 4 MMm3/d, with price incentives in the case of production increases and
penalties involving LNG imports in the case of non-compliance with committed volumes. Moreover, companies eligible for the Program mentioned in the preceding paragraph and meeting the relevant requirements may request withdrawal from such program
and admission in the current program.

(b) Withholding Taxes on Exports

The Public Emergency Law established withholding taxes on exports of hydrocarbons to last for five years from
March 1, 2002, which period was subsequently extended for five further years as from January 2007 pursuant to Law No. 26,217. The taxes withheld are deducted from the sales price of the exported hydrocarbons.

Effective November 2007, Resolution No. 394/07 issued by the Ministry of Economy provided for a new method for
calculating withholding taxes on exports of petroleum oils, oils obtained from bituminous minerals and certain oil by-products. Under this new method, when the international price for crude oil exceeded U.S.$60.90 per barrel, an incremental
withholding tax rate was applied to crude oil exports, capping the price the producer received at U.S.$42 per barrel. While the international price for crude oil was between U.S.$45 and U.S.$60.90 per barrel, a 45% withholding tax was applied. If
the international price for crude oil decreased below U.S.$45 per barrel, the authorities were required to set new rates within 90 days. A similar withholding regime applied to exports of oil by-products such as gasoline, fuel oil and lubrication
oils, with different cut-off and reference prices. This new tax regime had a negative impact on our Refining and Distribution business unit, particularly on exports of fuel oil, Vacuum Gas Oil (VGO) and gasoline. On January 3, 2013,
the Ministry of Economy, through Resolution No. 01/13, modified the methodology for the calculation of taxes on exports of crude oil and other crude derivatives by increasing the reference value to U.S.$ 80 per barrel and the cutoff value
to U.S.$ 70 per barrel. If the international price for crude oil is lower than the reference price, the applicable withholding rate will be 45%.

In March 2008, the Ministry of Economy issued Resolution No. 127/08, amending Resolution No. 534/06 and imposing a 100% withholding tax on natural gas exports, based upon the highest price set
for natural gas under any applicable agreement for natural gas imports into Argentina. Under this resolution, taxes on natural gas exports are equal to the cost of natural gas imported into Argentina. We have negotiated new contractual terms with
our foreign customers to pass along the economic effect of these increased withholding taxes. In addition under Resolution No. 127/08, the method for calculating withholding taxes on exports of crude oil, as described above, is also applicable
to LPG. See Item 3. Key InformationRisk FactorsFactors relating to Our BusinessExport taxes on our products have negatively affected, and may continue to negatively affect, the profitability of our operations.



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(c) Downstream Margins

Downstream margins declined significantly after the enactment of the Public Emergency Law in January 2002. Since that
time, the Argentine government has actively intervened in the fuel market to secure domestic supply and limit increases in the price of gasoline and diesel at the retail level in the domestic market. See Item 3. Key InformationRisk
FactorsFactors relating to Our BusinessLimitations on local pricing in Argentina may adversely affect our results of operations. Commencing in 2007, the Argentine government allowed gradual increases in fuel prices, which
facilitated a partial recovery in our margins. On April 10, 2013, Secretary of Domestic Trade Resolution No. 35/13 was published in the Official Gazette, setting maximum sales prices for liquid fuels for a period of six months, later
extended for 45 additional days (Secretary of Domestic Trade Res. No. 108/13). Resolution No. 108/13 has not been extended. On February 2014, the Argentine government agreed with some of the main oil companies and refineries a 6% maximum
increase in their liquid fuels prices, subject to monthly review, and promoted individual agreements between producers and refiners to apply gradual discounts in crude oil purchases.

Demand for fuel in the Argentine market has steadily grown over the last several years. To secure domestic supply, in the
face of growing demand and the inability of Argentine refineries to significantly increase production levels, in 2006 the Secretary of Domestic Trade promulgated Resolution No. 25/06, which required refining companies to supply all diesel
market demand with a baseline equal to the demand for the same month of the prior year, plus an estimated market variation.

Under Law No. 26,022, diesel imports and sales in the domestic market of volumes imported during 2006 and 2007 were exempted from taxes on liquid fuels, natural gas and diesel, and from other taxes.
During subsequent years, this exemption was incorporated into the Argentine Budget Law and the SE has since issued several resolutions proposing that hydrocarbon market operators participate in this regime. In 2013, PESA utilized this tax exemption
and imported 161,000 cubic meters of diesel.

In the future, subject to the production capacity of our plants
and real market growth levels, we may be required to continue importing diesel pursuant to Secretary of Domestic Trade Resolution No. 25/06, supplying the domestic market at the local price. This obligation could have an adverse effect upon our
results of operations, as we do not have any assurance that the Argentine government will in the future subsidize the cost of these programs or incorporate related tax exemptions into the Argentine Budget Law.

We cannot assure you that the Argentine government will not make further regulatory changes that could adversely affect
our downstream margins.

(d) Electricity Generation

With the enactment of the Public Emergency Law, the Argentine government implemented the pesification of
dollar-denominated prices in the MEM, and set a cap on prices that could be charged for gas used in electric power generation. As a result of this regulation, electricity prices failed to reflect total generation costs. This discrepancy led to the
gradual depletion of the Stabilization Fund (Fondo de Estabilización), causing an increasing deficit, which in turn prevented CAMMESA from settling accounts normally with market agents.

In an effort to reduce the Stabilization Fund deficit, the Argentine government initially made contributions to the fund
and reinstated seasonal adjustments, recognizing some of the increased costs resulting from the recovery of natural gas prices pursuant to applicable regulations in the determination of wholesale spot prices. Subsequently, the SE encouraged MEM
creditors to participate in investments in electric power generation in order to increase the available supply of electric power generation in Argentina. For this purpose, two investment funds were organized, FONINVEMEM I and II. The financing of
FONINVEMEM I and II was made through the contribution of 35% and 50% of the credit balances recorded in the 2004-2006 period and in the year 2007, respectively, resulting from the spread between the selling price of energy and the variable
generation cost in the spot market. The total contribution by all wholesale electric market private creditors is estimated at U.S.$530 million for all periods, of which PESA contributed U.S.$55 million, dedicating U.S.$39 million to FONINVEMEM I and
U.S.$16 million to FONINVEMEM II.

On October 17, 2005, under the terms of SE Resolution No. 1,193,
PESA and other MEM creditors formally announced their decision to manage the construction, operation and maintenance of two power plants of at least 800 MW each, the Termoeléctrica Manuel Belgrano and Termoeléctrica José de San
Martín plants. Combined construction costs of the plants was approximately U.S.$1.3 billion and was funded with the contributions to FONINVEMEM I and II, with an additional charge imposed on consumers, and with contributions from the
Argentine government.

The gas turbines of the Termoeléctrica Manuel Belgrano and Termoeléctrica
José de San Martín power plants were operating in open cycle mode as of December 31, 2009 and in combined cycle as from the first quarter of 2010.



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The Company recovers the amounts contributed to the FONINVEMEM I, in 120
monthly installments starting March 2010, upon authorization of commercial operations of both power plants in the combined cycle mode referred to above.

By December 31, 2009 the funds contributed by the Company to FONINVEMEM II had been fully recovered through investment in additional electricity generation projects under Resolution No. 564/2007
issued by the SE, whereby the Company built Genelba Plus, a 165 MW thermoelectric plant close to the existing Genelba Power Plant.

In 2008, as a consequence of the increasing deficit in the Stabilization Fund, CAMMESAs debt with generation agents, including us, gradually increased. Therefore, generation companies only received
payment from CAMMESA for variable production costs and for power and services such as the primary frequency response system, but not for the margin (between the spot price and the variable production cost) on sales to the spot market. For the
purpose of remedying this situation and securing generation supply, the SE issued Resolution No. 724/08 aimed at improving the collection priority of generation companies. Under this resolution, generation companies were able to submit projects
for the expansion of the lifespan and/or generation capacity of their units for the purpose of ensuring priority in the collection of credit balances owed by CAMMESA.

During 2010, several resolutions were approved to improve the operating margins of electricity generators. Under SE Notes
No. 6,169 and No. 6,866, CAMMESA was instructed to accept assignment as from May 1, 2010 of gas and transportation agreements by electric power generators, to centralize and optimize delivery of natural gas to the electricity
generation sector. In exchange, a gross margin is accrued to electricity generators as if generation were performed with natural gas, regardless of the fuel used. SE Resolution No. 7,548, applicable to energy sold pursuant to the Energy Plus
Program, was subsequently published and pursues the same objective. As of the date of this Annual Report, the above mentioned resolutions have been renewed and remain in effect.

On November 25, 2010, an agreement was entered into between generators and the SE to start readjustment of the MEM
and comply with SE Resolution No. 1,427/04. Pursuant to this agreement, generators expected to start receiving a higher fee for monthly generation capacity availability, regardless of the actual dispatches to the SIN. In addition, higher
operation and maintenance costs were to be recognized according to fuel used for generation. Generators, in turn, undertook to continue with their maintenance investment plans and to make investments with the proceeds from sales which generated the
credit with CAMMESA described above. As from 2012, the agreement was terminated.

In November 2011, a new
seasonal price was approved for the November 2011-April 2012 period, reflecting values close to actual market costs. In subsequent resolutions, regulatory entities jointly started to reduce subsidies previously granted to certain industrial,
commercial and residential sectors. These measures are aimed principally at providing greater predictability to market agents and supporting an economic and financial readjustment of economic transactions in the MEM.

In March 2013, the SE approved Resolution No. 95/2013 involving changes in the compensation scheme for MEM
Generators, Co-generators and Self-generators except for Plus Generators, Binational Hydroelectric Generation and Nuclear Generation, among others. The following changes are applicable to Generators adhering to this new scheme:



| | 1. | changes in the compensation of generation companies according to their production scale and technology. Non fuel fixed and variable costs and an
additional compensation are paid; payment of the latter two items is subject to the generation of each power plant, with a portion of the additional compensation being applied to a trust to finance works in the electricity sector.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | temporary suspension of agreements among private companies between Generators and Larger Users in the MEM, in connection with both energy and fuels
and related products, that will be managed by CAMMESA.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

(e) Regulation of Utilities

The Public Emergency Law pesified tariffs for public utility services at a Ps. 1.00 = U.S.$1.00 parity
and prohibited the increase of these tariffs based on indexation factors. In addition, the Argentine government was authorized to renegotiate the terms of contracts relating to the provision of public utility services, taking into account the
following criteria: (i) the impact of tariffs on economic competitiveness and on income distribution; (ii) the quality of services to be provided and/or the capital expenditure programs provided for in the contracts; (iii) the
interest of customers and accessibility to services; (iv) the safety of the system; and (v) the companies profitability.

In February 2002, the Ministry of Economy was authorized to renegotiate contracts with public utility companies. In July 2003, UNIREN was created under the joint jurisdiction of the Ministry of Economy
and the Ministry of Federal Planning. UNIRENs mission is, among other purposes, to provide assistance in the utilities renegotiation process, execute comprehensive or partial agreements with utility companies and submit regulatory projects
related to transitory price and rate adjustments.

UNIREN is currently renegotiating the contracts with TGS.
Pursuant to Law No. 26,896, enacted in December 2013, the term to renegotiate contracts for public works and utility services was extended through December 31, 2015. See Item 4. Information on the CompanyGas and EnergyGas
TransportationTGSTariff Renegotiation Process.



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We are unable to predict the future development of renegotiation processes
involving tariff and concession contracts or the impact they may have on the results of operations or the financial position of TGS.

(f) CIESAs Debt Restructuring

On
July 13, 2012, CIESA, Grupo Pampa and PESA entered into a settlement agreement whereby all parties involved waived all claims, title and interest under the lawsuit before the New York State courts and terminated the same. As a result of the
agreement, CIESA paid off all of its financial debt by means of (i) the transfer to Grupo Pampa of 4.3% of TGSs shares; (ii) a cash payment of approximately U.S.$130 million; (iii) the release of the remaining financial debt;
and (iv) execution on July 13, 2012 of a fifth amendment to the CIESA Restructuring Agreement whereby, upon obtaining governmental approval, Grupo Pampa will receive shares representing 40% of CIESAs capital stock which are currently
held in trust by The Royal Bank of Scotland N.V. Sucursal, Argentina.

As a result of full payment of
CIESAs financial debt, in the third quarter of 2012 we recorded a net gain of Ps. 291 million attributable to our equity interest in CIESA, of which Ps. 221 million and Ps. 165 million are shown under Other Operating
Income and Share of Profit of Equity Accounted Investees, respectively, with a Ps. 95 million charge recorded in the Income Tax line item.

Pursuant to the settlement agreement and the decisions taken by CIESAs board of directors meeting held on
October 23, 2012, on January 2, 2013 CIESA notified the CNV of the formal cancellation of its corporate bonds, initiating formal steps for CIESA ́s withdrawal from public offering and listing. On May 30, 2013, the CNV ordered
CIESAs withdrawal from public offering and listing, through Resolution No. 17,904.

(3) Migration of Operating Agreements in
Venezuela

In April 2005, the Venezuelan Energy and Oil Ministry instructed the Venezuelan national oil
company, PDVSA, to review all operating agreements signed with other oil companies between 1992 and 1997. The Ministry further instructed PDVSA to take all necessary action to convert those operating agreements into mixed-ownership companies whereby
the Venezuelan government, through PDVSA, would be entitled to majority ownership.

In March 2006, we, through
our related companies in Venezuela, signed memoranda of understanding with PDVSA and the CVP in order to effect the migration of our four pre-existing operating agreements. As a result, all of our operating service agreements were converted into
mixed-ownership companies in which the Venezuelan government, through the CVP, holds at least 60% of the share capital and private companies hold the remaining.

In view of the new contractual framework, as of December 31, 2005, we recognized impairment charges of Ps.
424 million to adjust the book value of our assets in Venezuela to their estimated recoverable value.

Additionally, the CVP recognized a divisible and transferable credit in favor of PESA in the amount of U.S.$88.5 million,
which does not accrue interest, but could be applied toward acquisition bonds for any new mixed-ownership company project for oil exploration and production activities, or licenses for gas exploration and production operations in Venezuela. Once the
milestones required for recognition of the credit by PDVSA were reached, as of December 31, 2006, we recorded the credit at its estimated recoverable value of Ps. 180 million. As of December 31, 2007, since no projects for which the
aforementioned credit was eligible for investment had materialized, our efforts to transfer the credit to third parties had been unsuccessful, and alternative uses of the credit could not be anticipated, we recorded a writedown to reflect the
carrying value of such credit being zero.

As of December 31, 2013, the book value of our direct and
indirect interest in Venezuelan mixed-ownership companies, net of impairment charges, was Ps. 3.1 billion. The recoverability of these investments is highly sensitive to crude oil price volatility, to economic, social and regulatory changes in
Venezuela and, particularly, to the decisions made by management of the mixed-ownership companies. Decreases in crude oil prices, fluctuations in economic conditions, the adoption of more restrictive measures by the Venezuelan government, and
decisions by mixed-ownership companies to limit the development of reserves could adversely affect the valuation of the recoverability of our investment in these companies and, consequently, our income. As a result of the aforementioned variables,
in the years ended December 31, 2013, 2012 and 2011, we recorded writedowns of Ps. 520 million, Ps. 285 million and Ps. 281 million , respectively, related to our assets in Venezuela.

See Item 4. Information on the CompanyOil and Gas Exploration and ProductionProductionProduction
Outside of ArgentinaVenezuela and Item 3. Key InformationRisk FactorsFactors Relating to Our BusinessOur activities may be adversely affected by events in countries in which we do business.

(4) Commodities Prices

Our results of operations and cash flows are exposed to risks related to the volatility of international prices, mainly crude oil and oil-related product prices.



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International prices for crude oil have fluctuated significantly over the
last ten years. Changes in crude oil prices usually entail changes in the price for oil-related products.

During 2013, the annual average price of WTI reference crude oil was U.S.$97.9 per barrel, accounting for a 4% increase
compared to 2012. The annual average price of (UK) Brent oil was U.S.$108.8 per barrel, representing a premium over the WTI price of approximately U.S.$10.9.

(5) Oil and Gas Production in Argentina

Oil and gas
reserves in Argentina have followed a downward trend in recent years. During 2013, according to the SE, oil production in Argentina declined to an average of 540 thousand barrels per day, a 2% decrease compared to 2012. Gross gas production
decreased 5% to 114 million cubic meters per day. Our oil and gas production accounted for approximately 8% and 6% of total oil and gas production in Argentina, respectively, during 2013.

In this context, our oil and gas reserves in Argentina, net of additions, declined 3% in 2013 and 2% in 2012. Our
production decreased 3% in 2013 compared to a 6% increase in 2012.

The Companys business plan provides
for exploration investments in Argentina.

Due to risks inherent to exploration activities, our management
cannot assure you that this downward trend in our Argentine reserves will be reversed.

(6) Operations in Ecuador

As from 2006, the Ecuadorian government introduced sweeping tax and regulatory reforms in the hydrocarbon sector which
resulted in significant changes to the terms and conditions set forth at the time of execution of the participation agreements.

See Item 4. Information on the CompanyOil and Gas Exploration and ProductionProductionProduction Outside of ArgentinaEcuador and Item 3. Key InformationRisk
FactorsFactors Relating to Our BusinessOur activities may be adversely affected by events in countries in which we do business.

(7) Changes in Our Oil and Gas Exploration and Production Portfolio

On December 2011, the Company relinquished 100% of the CAA-40 block and also relinquished its interests in the CAA-46 block, in the offshore Malvinas basin.

On May 31, 2012, we purchased a 39.671% interest in PELSA from our controlling company, PPSL, for a price of
U.S.$249.4 million. As from such date, PESA has exercised control over PELSA with a 58.88% total equity interest. See Item 7. Major Shareholders and Related Party TransactionsRelated Party TransactionsAcquisition of
Companies.

In 2013, the Province of Chubut approved a ten-year extension of the concession agreement
for El Tordillo and La Tapera-Puesto Quiroga areas.

(8) Divestment of Innova

On March 31, 2011, we agreed to sell our 100% interest then held in Innova S.A. (Innova), Brazil, to our
controlling company, Petrobras, for a price of U.S.$332 million. This transaction is consistent with the Companys strategy to prioritize its activities in Argentina. See Item 7. Major Shareholders and Related Party
TransactionsRelated Party TransactionsSale of Companies.

(9) Divestment of Distrilec

On January 30, 2013, we sold our 48.5% indirect interest in Distrilec, the parent company of Edesur for a price of
U.S.$35 million and recorded a loss of P$34 million in 2013 (see Note 13.1.1 to the Audited Consolidated Financial Statement).



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DISCUSSION OF RESULTS

The table below presents our selected consolidated financial data for the fiscal years indicated.

Presentation of Financial Information in accordance with IFRS

Since January 1, 2012, in compliance with adopted accounting standards applicable to public companies in Argentina
and regulations introduced by the CNV, PESA prepares its statutory financial statements in accordance with IFRS as issued by the IASB.

Consistent with Item 18 of Form 20-F, we continue to provide the disclosure required under ASC Topic 932, as this is required regardless of the basis of accounting on which we prepare our
financial statements.



|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|--------------------------------------------- |  | ----------------------- | ------- | - | ---- |  | ------ | ---- |  |  | ------ | -
|                                              |  | Year Ended December 31, |        
|                                              |  | 2013                    |         |   | 2012 |  |        | 2011 | 
|                                              |  | (in millions of pesos)  |        
|IFRS Summary Financial Data:                  |  |                         |         |   |      |  |        |      |  |  |        |  
|Continuing Operations:                        |  |                         |         |   |      |  |        |      |  |  |        |  
|Sales                                         |  |                         | 15,340  |   |      |  | 12,765 |      |  |  | 11,104 |  
|Cost of sales                                 |  |                         | (11,260 | ) |      |  | (9,619 | )    |  |  | (8,462 | )
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|Gross profit                                  |  |                         | 4,080   |   |      |  | 3,146  |      |  |  | 2,642  |  
|Administrative and selling expenses           |  |                         | (1,797  | ) |      |  | (1,430 | )    |  |  | (1,222 | )
|Exploration expenses                          |  |                         | (82     | ) |      |  | (212   | )    |  |  | (391   | )
|Other operating expenses, net                 |  |                         | (571    | ) |      |  | (121   | )    |  |  | (831   | )
|Share of profit of equity accounted investees |  |                         | (279    | ) |      |  | (148   | )    |  |  | (36    | )
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|Operating income                              |  |                         | 1,351   |   |      |  | 1,235  |      |  |  | 162    |  
|Financial results                             |  |                         | 53      |   |      |  | (70    | )    |  |  | (176   | )
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|Income before income tax                      |  |                         | 1,404   |   |      |  | 1,165  |      |  |  | (14    | )
|Income tax                                    |  |                         | (552    | ) |      |  | (492   | )    |  |  | (15    | )
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|Income from continuing operations             |  |                         | 852     |   |      |  | 673    |      |  |  | (29    | )
|Discontinued Operations:                      |  |                         |         |   |      |  |        |      |  |  |        |  
|Income from discontinued operations           |  |                         |        |   |      |  |       |      |  |  | 706    |  
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|Net income                                    |  |                         | 852     |   |      |  | 673    |      |  |  | 677    |  
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|                                              |  |                         |        
|Net income attributable to:                   |  |                         |         |   |      |  |        |      |  |  |        |  
|Shareholders of the Company                   |  |                         | 779     |   |      |  | 618    |      |  |  | 681    |  
|Non-controlling interest                      |  |                         | 73      |   |      |  | 55     |      |  |  | (4     | )
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  
|Total                                         |  |                         | 852     |   |      |  | 673    |      |  |  | 677    |  
|                                              |  |                         |         |   |      |  |        |      |  |  |        |  



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The following tables set out sales, gross profit (loss) and operating income
for each of our business segments for the years ended December 31, 2013, 2012 and 2011. Sales eliminations relate to intersegment sales. Gross profit eliminations relate to adjustments related to intersegment sales and costs associated with
such sales. Intersegment transactions are made at market prices.

The business segment year-to-year
comparisons that follow the table include intersegment sales.



|                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|-------------------------------------- |  | ------------------------------- | ------ | - | ---- |  | ------ | ---- |  |  | ------ | -
|                                       |  | For the year ended December 31, |       
|                                       |  | 2013                            |        |   | 2012 |  |        | 2011 | 
|                                       |  | (in millions of pesos)          |       
|Sales
(1)                              |  |                                 |        |   |      |  |        |      |  |  |        |  
|                                       |  |                                 |       
|Oil and Gas Exploration and Production |  |                                 | 7,838  |   |      |  | 6,113  |      |  |  | 4,144  |  
|Refining and Distribution              |  |                                 | 8,146  |   |      |  | 6,957  |      |  |  | 7,351  |  
|Petrochemicals                         |  |                                 | 3,348  |   |      |  | 2,907  |      |  |  | 1,803  |  
|Gas and Energy(2)                      |  |                                 | 2,704  |   |      |  | 2,522  |      |  |  | 2,336  |  
|Corporate, Other and Eliminations      |  |                                 | (6,696 | ) |      |  | (5,734 | )    |  |  | (4,530 | )
|                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|Total                                  |  |                                 | 15,340 |   |      |  | 12,765 |      |  |  | 11,104 |  
|                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|Gross Profit (loss) (3)                |  |                                 |        |   |      |  |        |      |  |  |        |  
|                                       |  |                                 |       
|Oil and Gas Exploration and Production |  |                                 | 2,337  |   |      |  | 1,867  |      |  |  | 1,162  |  
|Refining and Distribution              |  |                                 | 794    |   |      |  | 573    |      |  |  | 732    |  
|Petrochemicals                         |  |                                 | 521    |   |      |  | 224    |      |  |  | 241    |  
|Gas and Energy(2)                      |  |                                 | 486    |   |      |  | 433    |      |  |  | 567    |  
|Corporate, Other and Eliminations      |  |                                 | (58    | ) |      |  | 49     |      |  |  | (60    | )
|                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|Total                                  |  |                                 | 4,080  |   |      |  | 3,146  |      |  |  | 2,642  |  
|                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|                                       |  |                                 |       
|Operating Income                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|                                       |  |                                 |       
|Oil and Gas Exploration and Production |  |                                 | 1,342  |   |      |  | 1,072  |      |  |  | (113   | )
|Refining and Distribution              |  |                                 | 216    |   |      |  | 12     |      |  |  | 245    |  
|Petrochemicals                         |  |                                 | 306    |   |      |  | 152    |      |  |  | 133    |  
|Gas and Energy(2)                      |  |                                 | 398    |   |      |  | 548    |      |  |  | 579    |  
|Corporate, Other and Eliminations      |  |                                 | (911   | ) |      |  | (549   | )    |  |  | (682   | )
|                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|Total                                  |  |                                 | 1,351  |   |      |  | 1,235  |      |  |  | 162    |  
|                                       |  |                                 |        |   |      |  |        |      |  |  |        |  



| | (1) | Royalties with respect to the oil and gas business in Argentina are accounted for as a cost of production and are not deducted in determining sales.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------

| | (2) | This segment includes Electricity and Gas Transportation.
| | --- | ---------------------------------------------------------

| | (3) | Sales less cost of sales.
| | --- | -------------------------



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YEAR ENDED DECEMBER 31, 2013 COMPARED
TO YEAR ENDED DECEMBER 31, 2012

Net income attributable to shareholders of the
Company: Net income attributable to the shareholders of the Company increased by Ps. 161 million, or 26.1%, to Ps. 779 million in 2013 from Ps. 618 million in 2012.

Sales: Sales increased by Ps. 2.6 billion, or 20.2%, to Ps. 15.3 billion in 2013 from Ps. 12.8 billion in
2012. Sales increased by Ps. 1.7 billion, Ps. 1.2 billion, Ps. 441 million and Ps. 182 million in the Oil and Gas Exploration and Production, Refining and Distribution, Petrochemicals, and Gas and Energy business segments, respectively.
Intercompany sales totalled Ps. 6.7 billion in 2013 and Ps. 5.7 billion in 2012.

Gross
profit: Gross profit for 2013 increased by Ps. 934 million, or 29.7%, to Ps. 4.1 billion from Ps. 3.1 billion in 2012. Gross profit increased by Ps. 470 million, Ps. 297 million, Ps. 221 million and Ps. 53 million in
the Oil and Gas Exploration and Production, Petrochemicals, Refining and Distribution, and Gas and Energy business segments, respectively.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 367 million, or 25.7%, to Ps. 1.8 billion in 2013 from Ps. 1.4 billion in 2012, mainly as a
consequence of increases of Ps. 143 million, Ps. 87 million and Ps. 45 million in the Refining and Distribution, Oil and Gas Exploration and Production and Petrochemicals business segments, respectively.

Exploration expenses:Exploration expenses totalled Ps. 82 million in 2013 and Ps. 212 million in
2012 and are attributable to operations in Argentina. Expenses for both fiscal years are attributable to abandonment of on-shore wells. See Analysis of Operating Income by Business SegmentOil and Gas Exploration and
Production.

Other operating expenses, net: Other operating expenses, net, totalled
Ps. 571 million and Ps. 121 million in 2013 and 2012, respectively.

Other operating expenses for
2013 included losses of Ps. 118 million attributable to the plant shutdown in 2013 and a loss of Ps. 34 million as a result of the sale of Edesurs shares in the first quarter of 2013. Other operating expenses for 2012 included a gain
of Ps. 221 million attributable to CIESAs debt restructuring.

Share of profit of equity
accounted investees: Losses resulting from our share of profit of equity accounted investees increased by Ps. 131 million in 2013, to Ps. 279 million in 2013 from Ps. 112 million in 2012, mainly attributable to an increased
loss of 210 in the Oil and Gas Exploration and Production business segment, only partially offset by improvements of Ps. 46 million and Ps. 33 million in the Gas and Energy and Refining and Distribution business segments, respectively. See
Analysis of Share of Profit of Equity Accounted Investees.

Operating income:
Operating income increased by Ps. 116 million in 2013 to Ps. 1.4 billion, from Ps. 1.2 billion in 2012. Operating income increased by Ps. 270 million, Ps. 204 million and Ps. 154 million in the Oil and Gas Exploration and
Production, Refining and Distribution and Petrochemicals business segments, respectively, and declined by Ps. 150 million in 2013 for the Gas and Energy business segment.



| |  |  | Financial results: Financial results accounted for a gain of Ps. 53 million in 2013 compared to a loss of Ps. 70 million in
2012. This improvement is basically attributable to improved performance of financial assets, with a net monetary asset position in foreign currency, and, to a lesser extent, a lower financial debt burden as a consequence of the Companys debt
reduction policy.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Income tax:Income tax charges totalled Ps.
552 million and Ps. 492 million in 2013 and 2012, respectively, consistent with an improvement in our results of operations in 2013.



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PESAs business is mainly focused on the energy sector, through
activities relating to oil and gas exploration and production, refining and distribution, petrochemicals and gas and energy. Assets and operating losses related to the Corporate segment, expenses not attributable to any other operating segment and
intercompany eliminations are collectively shown. The Corporate segment includes expenses such us management fees, taxes on financial transactions, financial liabilities interests and income taxes, which are incurred by us in the ordinary course of
operations.

ANALYSIS OF OPERATING INCOME BY BUSINESS SEGMENT

Oil and Gas Exploration and Production

Operating income:Operating income for the Oil and Gas Exploration and Production business segment increased by Ps. 270 million, or 25.2%, to Ps. 1.3 billion from Ps. 1.1 billion in
2012.

Sales: Sales increased by Ps. 1.7 billion, or 28.2%, to Ps. 7.8 billion in 2013 from Ps.
6.1 billion in 2012, mainly due to the improvement recorded in our results of operations in Argentina for 2013.

Argentina

Sales attributable to our operations in Argentina increased by Ps. 1.7 billion, or 28.7%, to Ps. 7.6 billion in 2013 from Ps. 5.9 billion in 2012.

Consolidation of PELSAs operations as from June 1, 2012 resulted in the recognition of sales of Ps. 1,7
billion in 2013 and Ps. 869 million in 2012. Excluding these effects, oil and gas sales increased by Ps. 867 million to Ps. 6 billion from Ps. 5,1 billion, mainly as a result of a 29.5% rise in average sales prices. The combined daily
sales volumes of oil and gas, however, decreased by 8.9%, averaging 73.3 thousand boes per day.

Lower
production of both oil and gas is primarily attributable to the natural decline of mature fields. This effect was partially offset by an increase in production volumes derived from new wells in Medanito and Jagüel de los Machos.

Crude oil sales rose Ps. 681 million, or 16.1%, to Ps. 4,9 billion from Ps, 4,2 billion in 2012, mainly due to a 24%
increase in the average sales price (driven by increases in domestic prices) to Ps.392 per barrel from Ps. 316 per barrel. Sales volumes totalled 34.2 thousand barrels per day in 2013, compared to 36.4 thousand barrels per day in
2012.

Gas sales rose Ps. 209 million, or 25.1%, to Ps. 1 billion from Ps. 832 million, primarily
due to a 41.5% increase in the sales price to Ps. 12.2 per thousand cubic feet from Ps. 8.6 per thousand cubic feet, mainly due to recognition of a higher price (under the Gas Plus program) sold from the Neuquén basin to industries
and trading companies. Daily gas sales volumes totalled 234.1 million cubic feet and 264.1 million cubic feet in 2013 and 2012, respectively.

Outside of Argentina

Total sales volumes for operations
outside of Argentina increased by Ps. 17 million, or 9.9%, to Ps. 189 million in 2013 from Ps. 172 million in 2012, mainly attributable to operations in Bolivia and Mexico.

Gross profit: Gross profit increased by Ps. 470 million, or 25.2%, to Ps. 2.3 billion in 2013 from Ps.
1.9 billion in 2012. Our margin on sales was 29.8% and 30.5% in 2013 and 2012, respectively.

Consolidation of
PELSAs operations accounted for a gross profit of Ps, 642 million in 2013 and Ps. 355 million in 2012. Excluding these effects, gross profit rose Ps. 183 million to Ps. 1,7 billion from Ps. 1,5 billion and margin on sales
decreased to 27.6% in 2013 from 28.8% in 2012, mainly due to operations in Argentina.

In 2013, gross profit
attributable to operations in Argentina increased Ps. 173 million, or 12%, to Ps. 1.6 billion from Ps. 1,4 billion, although margin on sales declined to 27% in 2013 from 28.3% in 2012, mainly due to increased production costs and lower sales
volumes, which were mitigated by the partial recovery of sales prices.

Gross profit for operations outside of
Argentina rose Ps, 17 million, or 9.9%, to Ps, 85 million from Ps, 75 million, with a gross margin on sales of 45% and 43.6%, respectively.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 87 million, or 33% to Ps. 350 million in 2013 from Ps. 263 million in 2012, mainly as
a consequence of consolidation of PELSAs operations, which accounted for Ps. 128 million and Ps. 61 million in 2013 and 2012, respectively.

Exploration expenses:Exploration expenses decreased Ps. 130 million, or 61%, to Ps. 82 million in 2013 from Ps. 212 million in 2012, as a result of higher expenses for
abandonment of on-shore exploration wells in 2012. Expenses for unsuccessful wells totalled Ps. 27 million in 2013 compared to Ps. 168 million in 2012.



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Other operating expenses, net: Other operating
expenses, net, totalled Ps. 227 million and Ps. 194 million in 2013 and 2012, respectively.

Share of profit of equity accounted investees: Losses resulting from our share of profit of equity
accounted investees totalled Ps. 336 million in 2013 and Ps. 126 million in 2012, mainly derived from investments in Mixed Companies in Venezuela. See Analysis of Share of Profit of Equity Accounted Investees.

As from June 1, 2012 we acquired the control of PELSA. Until May 31, 2012 we recognized equity in the earnings
of PELSA by applying the equity method of accounting, with a gain of Ps. 26 million in the five-month period ended May 31, 2012.

Refining and Distribution

Operating income:Operating income increased by Ps. 204 million, to Ps. 216 million in 2013 from Ps. 12 million in 2012.

Sales: Sales increased by Ps. 1.2 billion, or 17.1%, to Ps. 8.1 billion in 2013 from Ps. 7.0 billion in 2012, mainly as a consequence of an increase in average sales
prices of about 26% in refined products, partially offset by lower sales volumes of crude oil.

In 2013, the
Bahía Blanca Refinery processed 28,730 oil barrels per day, accounting for a 94.2% of its installed capacity, in line with the 28,722 barrel-per-day volume processed in 2012.

Crude oil sales to third parties dropped by Ps. 224 million, or 25.8%, to Ps. 702 million in 2013 from
Ps. 946 million in 2012, mainly due to a decline in volumes sold.

Volumes of refined products sold
totalled 1,962 thousand cubic meters in 2013 and 1,992 thousand cubic meters in 2012.

In 2013,
sales volumes of diesel, gasoline, fuel oil, and IFOs and other oil-related products totalled 782 thousand cubic meters, 554 thousand cubic meters, 480 thousand cubic meters and 146 thousand cubic meters, respectively, compared
to 791 thousand cubic meters, 547 thousand cubic meters, 461 thousand cubic meters and 194 thousand cubic meters, respectively, in 2012.

Gross profit: Gross profit increased by Ps. 221 million, or 38.6%, to Ps. 794 million in 2013 from Ps. 573 million in 2012, primarily due to an improvement in sales prices
which more than offset the rise in production costs. As a result, margin on sales rose to 9.7% in 2013 from 8.2% in 2012.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 143 million, or 24%, to Ps. 728 million in 2013 from Ps. 585 million in 2012, mainly
as a consequence of higher selling expenses, basically freights and gross revenue taxes, associated with increased sales in 2013.

Other operating expenses, net: Other operating expenses, net, accounted for gains of Ps. 106 million in 2013 and Ps. 13 million in 2012.

Share of profit of equity accounted investees: Earnings resulting from our share of profit of equity
accounted investees is attributable to equity interest in Refinor, which accounted for gains of Ps. 44 million in 2013 and Ps. 11 million in 2012. Volumes of crude oil processed, mainly directed to export markets, rose 12.5%. See
Analysis of Share of Profit of Equity Accounted Investees.

Petrochemicals

Operating income:Operating income increased by Ps. 154 million, to Ps. 306 million in 2013 from
Ps. 152 million in 2012.

Sales: Sales increased by Ps. 441 million, or 15.2%,
to Ps. 3.3 billion in 2013 from Ps. 2.9 billion in 2012, primarily as a consequence of a 26% rise in average sales prices, which was partially offset by a decline in sales volumes.

Styrene product sales increased by Ps. 345 million to Ps. 2.2 billion in 2013 from Ps. 1,9 billion in 2012, mainly
as a consequence of a 25% improvement in average sales prices. The increase was partially offset by a 5.5% decrease in sales volumes to 196.1 thousand tons in 2013 from 207,6 thousand tons in 2012.

In 2013, average sales prices in pesos in the styrene and polystyrene lines increased approximately 38% compared to 2012.
As regards synthetic rubber, while butadiene international prices sharply dropped, prices in pesos declined only 1.5%.



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Performance of the main styrenic products in 2013 was as follows:

a) Styrene sales volumes decreased 1% to 68.4 thousand tons in 2013 due to lower
production as a consequence of a plant scheduled shutdown in March and an unscheduled shutdown in July for polymerization of the recycle tower. Placing priority on the domestic market, the Company increased sales in the domestic market by 7%,
directed to EPS (Expanded PolyStyrene) and Polyester Resin, partially offsetting a 12% drop in exports.

b) Propane, propylene and ethylene sales volumes totalled 19.1 thousand tons, accounting for a 25% decrease. This decline is attributable to lower styrene production and consumption of our own
propane instead of acquired raw material.

c) Polystyrene and Bops (bi-oriented polystyrene)
sales volumes totalled 58.8 thousand tons, accounting for an 11.6% decline attributable to lower production as a consequence of trade union conflicts at the Zárate Plant between March and June 2013. Sales in the domestic market increased
1% as a consequence of the substitution of the Companys own production with imported products. Imports of polystyrene totalled 12.5 thousand tons and 0.4 thousand tons in 2013 and 2012, respectively.

d) Synthetic rubber sales volumes totalled 49.7 thousand tons, accounting for a 7.1% rise compared to
2012.

Revenues from the catalytic reformer plant operations rose Ps. 96 million, or 9.5%, to Ps.
1,110 million from Ps. 1,014 million in 2012, mainly as a consequence of a 22.1% improvement in the average sales prices, partially offset by a 10.3% decrease in sales volumes to 352 thousand tons in 2013 from 392 thousand tons
in 2012. This decline is attributable to reduced raw material availability.

Gross profit: Gross
profit increased by Ps. 297 million to Ps. 521 million in 2013 from Ps. 224 million in 2012, with a rise in margin on sales from 7.7% to 15.6% in 2013. This improvement is due to the combined effect of a recovery of average sales
prices, an improvement in styrene international spreads and an upgrade at the PGSM Plant that allowed to boost production with increased added value by replacing imported aromatics with the Companys own production.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 45 million,
to Ps. 155 million in 2013 from Ps. 110 million in 2012, mainly as a consequence of higher selling expenses, basically freights and gross revenue taxes, the latter associated with increased sales in 2013.

Other operating expenses, net: Other operating expenses, net, accounted for a loss of Ps.
60 million in 2013 compared to a gain of Ps. 38 million in 2012, as a consequence of expenses for plant shutdowns in 2013.

Gas and Energy

Operating income:Operating
income for the Gas and Energy business segment (which is comprised of Electricity Generation and Marketing and Transportation of Gas, as discussed below) decreased by Ps. 150 million, or 27.4%, to Ps. 398 million from Ps. 548 million
in 2012. Eliminations relating to sales between the Electricity Generation and Marketing and Transportation of Gas segments accounted for Ps. 4 million and Ps. (60) million, in 2013 and 2012, respectively.

Gross profit: Gross profit in 2013 increased by Ps. 53 million, or 12.2%, to Ps. 486 million from
Ps. 433 million in 2012, mainly in Electricity Generation operations.

Administrative and selling
expenses: Administrative and selling expenses increased by Ps. 22 million, to Ps. 98 million in 2013 from Ps. 76 million in 2012, mainly as a consequence of hydrocarbon marketing and transportation operations with increased
selling expenses, basically gross revenue taxes, associated with higher sales in 2013.

Other operating
expenses, net: Other operating expenses, net, totalled Ps. 3 million in 2013 compared to a gain of Ps. 224 million in 2012, attributable to a gain of Ps. 221 million derived from the restructuring of CIESAs debt.
In 2013, the Company recorded a loss of Ps. 34 million from the sale of Edesurs shares in the first quarter of 2013.

Share of profit of equity accounted investees: Share of profit of equity accounted investees totalled a gain of Ps. 13 million in 2013 compared to a loss of Ps. 33 million in 2012.
Gains in 2013 are mainly attributable to the impact of the restructuring on the equity interest in CIESA /TGS. See Analysis of Share of Profit of Equity Accounted Investees.

During 2012, we recorded a loss of Ps. 253 million attributable to a deterioration of Edesurs operating
results, which were adversely affected by an increase in costs. These effects were partially offset by gains attributable to the impact of the restructuring on equity interest in CIESA, resulting in a gain of Ps. 165 million deriving from its debt
restructuring in July 2012.



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Electricity Generation

Operating income:Operating income increased by Ps. 42 million, or 16.3%, to Ps. 300 million in
2013 from Ps. 258 million in 2012.

As from May 2013, retroactive to February 2013, Resolution
No. 95 issued by the SE provided for regulatory changes in the MEMs method of compensation of generation companies according to their production scale and technology. This change affected the Genelba Combined Cycle and Pichi Picún
Leufú Hidroelectric Complex.

These regulatory changes generated: (i) an equivalent lower level of
sales and costs, and (ii) an improvement in gross profit, derived from the new compensation scheme based on the generators production scale, technology and availability.

Sales: Sales decreased by Ps. 252 million, or 37%, to Ps. 1.3 billion in 2013 from Ps. 1.6 billion in
2012, mainly due to the implementation of the above mentioned regulatory changes in the MEM, retroactive to February 2013, which were only partially offset by an increased generation level in Pichi Picún Leufú and Ecoenergía
Power Plants.

Genelba Plus sales increased by Ps. 61 million, or 13.8%, to Ps. 504 million in 2013
from Ps. 443 million in 2012, as a consequence of an improvement in average sales prices. Sales volumes were similar in both fiscal years, nearing 1,300 GWh.

Genelba power plant sales decreased by Ps. 292 million, or 37%, to Ps. 495 million in 2013 from Ps.
787 million in 2012. Electricity sales for 2013 dropped 4.8% to 5,258GWh from 5,520 GWh in 2012, principally due to scheduled maintenance works performed in 2013. Within this context, the Genelba power plants availability factor and the
plant factor were 93% and 95% in 2013 and 99.1% and 95.7% in 2012, respectively.

Sales attributable to HPPL
increased by Ps. 20 million, or 16.4%, to Ps. 142 million in 2013 from Ps. 122 million in 2012. Sales volumes rose 22.6% to 1,092 GWh in 2013 from 891 GWh in 2012, partly due to higher water supply in the Comahue basin in 2013.

Sales attributable to Ecoenergía increased Ps. 28 million to Ps. 39 million from Ps.
11 million in 2012 since the Power Plant operated under the Energía Plus regulatory framework throughout 2013. Sales volumes rose 29 GWh to 97 GWh from 68 GWh in 2012.

Gross profit: In 2013, gross profit increased by Ps. 53 million, or 18.6%, to Ps. 338 million
from Ps. 285 million in 2012and margin on sales attributable to all power plants rose to 24.7% in 2013 from 17.6% in 2012. The improvement in 2013 is mainly attributable to the above mentioned regulatory changes in the MEM and, improved
delivery by the Pichi Picún Leufú Power Plant and sales under the Energía Plus regulatory framework.

Marketing and Transportation of Gas

Operating income: Operating income decreased Ps. 256 million, or 73.1%, to Ps. 94 million in 2013 from Ps. 350 million in 2012.

Sales:Sales revenues rose Ps. 284 million, or 19.5%, to Ps. 1.7 billion in 2013 from Ps. 1.4 billion
in 2012, mainly as a result of increased revenues from gas sales, partially offset by a decline in liquid fuel sales. Gas and LPG brokerage services totalled Ps. 27 million in 2013 and Ps. 28 million in 2012.

Revenues from gas sales increased by Ps. 314 million, or 27.6%, to Ps. 1.4 billion from Ps. 1.1 billion in 2012,
mainly due to a 41.9% increase in average sales prices, partially offset by a decline in sales volumes to 260 thousand cubic feet in 2013 from 289 thousand cubic feet in 2012. The improvement in average sales prices was mainly attributable
to increased volumes from Punta Rosada and El Mangrullo field operations performed under the Gas Plus program and to an increased share of sales to industries with higher average sales prices.

Revenues from liquid fuel sales dropped Ps. 29 million, or 10%, to Ps. 262 million in 2013 from Ps.
291 million in 2012, mainly due to a 29.9% decline in sales volumes to 96 thousand tons in 2013 from 137 thousand tons in 2012, as a result of: (i) failure to obtain permits for exports from El Cóndor Plant; (ii) use
of part of the Companys own propane production as input to replace purchases from third parties; (iii) discontinuance of propane sales to industries due to the lack of product availability and (iv) shutdowns for maintenance works at
PGSM Plant. These effects were partially offset by an improvement in average sales prices.

Gross
profit: Gross profit totalled Ps. 148 million in 2013 and gross margin on sales decreased to 8.5% in 2013 from 10.2% in 2012.



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ANALYSIS OF SHARE OF PROFIT OF EQUITY ACCOUNTED INVESTEES

The table below shows the Companys share of profit of equity accounted investees for 2013 and 2012.



|                                                         |  |                                 |      |   |      |  |      |  
|-------------------------------------------------------- |  | ------------------------------- | ---- | - | ---- |  | ---- | -
|                                                         |  | For the year ended December 31, |     
|                                                         |  | 2013                            |      |   | 2012 | 
|                                                         |  | (in millions of pesos)          |     
|                                                         |  |                                
|CIESA (Gas and Energy)                                   |  |                                 | 10   |   |      |  | 219  |  
|Distrilec S.A. (Gas and Energy)                          |  |                                 |     |   |      |  | (253 | )
|Mixed-ownership companies in Venezuela (Oil and Gas E&P) |  |                                 | (357 | ) |      |  | (162 | )
|Petrolera Entre Lomas S.A. (Oil and Gas E&P)             |  |                                 |     |   |      |  | 26   |  
|Refinería del Norte S.A. (Refining and Distribution)     |  |                                 | 44   |   |      |  | 11   |  
|Others                                                   |  |                                 | 24   |   |      |  | 11   |  
|                                                         |  |                                 |      |   |      |  |      |  
|Total                                                    |  |                                 | (279 | ) |      |  | (148 | )
|                                                         |  |                                 |      |   |      |  |      |  

Losses resulting from our share of profit of equity accounted investees increased by Ps.
131 million in 2013, from Ps. 148 million in 2012 to Ps. 279 million in 2013, mainly as a result of a reduced gain derived from CIESA and greater losses from mixed-ownership companies inVenezuela. These effects were partially offset
by losses resulting from Distrilec in 2012.

CIESA / TGS: In 2013 and 2012, our share of profit
of equity in CIESA accounted for gains of Ps. 10 million and Ps. 219 million, respectively. The improvement in 2012 was mainly attributable to the positive effects of the restructuring of CIESAs debt in July 2012, resulting in the
recognition of a gain of Ps. 165 million.

Distrilec / EDESUR: Our share of profit of equity in
Distrilec accounted for losses of Ps. 253 million in 2012, mainly attributable to the deterioration of EDESURs operating results, which were adversely affected by an increase in operating costs without a corresponding recognition and
passing through of such increased costs to tariffs. In January 30, 2013, we sold our interest in Distrilec.

Mixed-ownership companies in Venezuela: Our share of profit of equity in mixed-ownership companies in Venezuela accounted for losses of Ps. 357 million and Ps. 162 million in 2013
and 2012, respectively, which included writedowns of Ps. 470 million and Ps. 260 million in 2013 and 2012, respectively.

Refinor: Our share of profit of equity in Refinor accounted for a increase in gains of Ps. 33 million in 2013, to a gain of Ps. 44 million in 2013 from a gain of Ps.
11 million in 2012, mainly as a result of an improvement in Refinors operating results, principally derived from a 12.5% increase in volumes of crude oil processed, mainly directed to export markets.

PELSA: As of June 1, 2012 the Company acquired control of PELSA. Until May 31, 2012, the Company
recognized share of profit of equity in PELSA by applying the equity method of accounting, with gains of Ps. 26 million in the five-month period ended May 31, 2012.



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YEAR ENDED DECEMBER 31, 2012 COMPARED TO YEAR ENDED
DECEMBER 31, 2011

Net income attributable to shareholders of the Company:
Net income attributable to the shareholders of the Company decreased by Ps. 63 million, or 9.3%, to Ps. 618 million in 2012 from Ps. 681 million in 2011. Net income in 2011 included a Ps. 706 million gain from discontinued
operations, derived from the sale of our equity interest in Innova in March 2011.

Net income generated by
continuing operations totalled Ps. 673 million in 2012 compared to a Ps. 29 million net loss from continuing operations in 2011.

Sales: Sales increased by Ps. 1.7 billion, or 15%, to Ps. 12.8 billion in 2012 from Ps. 11.1 billion in 2011. This increase is mainly attributable to sales increases of Ps. 2 billion, Ps.
1.1 billion and Ps. 186 million in the Oil and Gas Exploration and Production, Petrochemicals and Gas and Energy business segments, respectively, which were partially offset by a Ps. 394 million decline in sales for the Refining and
Distribution segment. Intercompany sales totalled Ps. 5.7 billion in 2012 and Ps. 4.5 billion in 2011.

Gross profit: Gross profit for 2012 increased by Ps. 504 million, or 19.1%, to Ps. 3.1 billion from Ps. 2.6 billion in 2011. This increase is mainly attributable to a Ps.
705 million increase in the Oil and Gas Exploration and Production segment, whereas gross profit declined in the Refining and Distribution, Gas and Energy and Petrochemicals business segments.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 208 million,
or 17%, to Ps. 1.4 billion in 2012 from Ps. 1.2 billion in 2011, mainly as a consequence of incremental selling expenses corresponding to the rise in sales in all business segments and to the consolidation of PELSAs operations in 2012.

Exploration expenses:Exploration expenses totalled Ps. 212 million in 2012 compared to
Ps. 391 million in 2011. See Analysis of Operating Income by Business SegmentOil and Gas Exploration and Production.

Other operating expenses, net: Other operating expenses, net, declined in 2012 by Ps. 710 million, totaling Ps. 121 million and Ps. 831 million in 2012 and 2011,
respectively.

This decrease is mainly attributable to a Ps. 371 million and Ps. 186 million in the
Oil and Gas Exploration and Production segment and the Gas and Energy business segment, respectively.

Share of profit of equity accounted investees: Losses resulting from our share of profit of equity
accounted investees increased by Ps. 112 million in 2012, to Ps. 148 million in 2012 compared to a loss of Ps. 36 million in 2011. This increase is mainly attributable to a Ps. 66 million increase in the Gas and Energy business
segment and a Ps. 56 million increase in the Refining and Distribution business segment. See Analysis of Share of Profit of Equity Accounted Investees.

Operating income: Operating income increased by Ps. 1 billion in 2012 to Ps. 1.2 billion, from Ps.
162 million in 2011. This increase is largely attributable to improved results in the Oil and Gas Exploration and Production segment.

Financial results: Financial expenses decreased by Ps. 106 million, or 39.7%, to Ps. 70 million in 2012 from Ps. 176 million in 2011. This improvement is largely attributable
to a decrease in interest expense, reflecting the positive effects of a 30% decline in average indebtedness; and an increase in gains on exchange differences, attributable to the effect of accelerated depreciation of the Argentine peso against the
U.S. dollar (14.2% and 8% in 2012 and 2011, respectively) on our net monetary asset position in foreign currency.

Income tax:Income tax charges totalled Ps. 492 million and Ps. 15 million in 2012 and 2011, respectively, consistent with a significant improvement in our results of operations in
2012.



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ANALYSIS OF OPERATING INCOME BY BUSINESS SEGMENT

Oil and Gas Exploration and Production

Operating income:Operating income totalled gains of Ps. 1.1 billion in 2012 and losses of Ps. 113 million in 2011.

Sales: Sales increased by Ps. 2 billion, or 47.5%, to Ps. 6.1 billion in 2012 from Ps. 4.1 billion in 2011,
mainly due to the improvement recorded in our results of operations in Argentina for 2012.

Argentina

Sales attributable to our operations in Argentina increased by Ps. 1.9 billion, or 48.4%, to Ps. 5.9
billion in 2012 from Ps. 4.0 billion in 2011.

As from June 1, 2012, the Company consolidated
PELSAs operations. In the remainder of 2012, PELSA accounted for average oil and gas production of 14.5 thousand boe per day, adding approximately 3.1 million boe to our production and accounting for a Ps. 869 million increase
in sales. Excluding these effects, oil and gas sales increased by Ps. 1.1 billion to Ps. 5.1 billion in 2012 from Ps. 4 billion in 2011, mainly as a result of a 30% rise in average sales prices. The combined daily sales volumes of oil and gas,
however, decreased by a 2,1%, averaging 80.5 thousand boe per day.

Excluding consolidation of PELSA,
daily production decreased approximately 1% to an average of 81.1 thousand boe per day in 2012. Lower production volumes of both oil and gas mainly derived from the natural decline of mature fields. This effect was partially offset by an
increase in production volumes derived from workover works and drilling campaigns.

Crude oil sales increased
by Ps. 988 million, or 30.7%, to Ps. 4.2 billion in 2012 from Ps. 3.2 billion in 2011, mainly due to a 31.4% increase in average sales price (driven by increases in domestic prices) to Ps. 316 per barrel in 2012 from Ps. 240 per
barrel in 2011. Sales volumes totalled 36.4 thousand barrels per day in 2012 compared to 36.8 thousand barrels per day in 2011.

Gas sales increased by Ps. 110 million, or 15.2%, to Ps. 832 million in 2012 from Ps. 722 million in 2011, primarily due to an 18.1% increase in sales prices to Ps. 8.6 per thousand
cubic feet in 2012 from Ps. 7.3 per thousand cubic feet in 2011, mainly due to recognition of higher prices under the Gas Plus Program sold from the Neuquén basin to industries and trading companies and for gas in the Austral basin.
Daily gas sales volumes totalled 264.1 million cubic feet in 2012, compared to 272.2 million cubic feet in 2011.

Outside of Argentina

Total sales volumes for operations
outside of Argentina increased by Ps. 12 million, or 7.5%, to Ps. 172 million in 2012 from Ps. 160 million in 2011, mainly as a result of the increase in gas sales prices for our operations in Bolivia.

Gross profit: Gross profit increased by Ps. 705 million, or 60.7%, to Ps. 1.9 billion in 2012 from Ps. 1.2
billion in 2011. Our margin on sales was 30.5% and 28% in 2012 and 2011, respectively.

Gross profit for 2012
included gross profit of Ps. 355 million attributable to the consolidation of PELSAs operations. Excluding these effects, gross profit grew by Ps. 350 million to Ps. 1.5 billion in 2012 from Ps. 1.2 billion in 2011, and our margin on
sales increased to 28.8% in 2012 from 27.9% in 2011, mainly an improvement in our results of operations in Argentina.

In 2012, gross profit for operations in Argentina rose Ps. 345 million, or 31.9%, to Ps. 1.4 billion from Ps. 1.1 billion in 2011, and our margin on sales increased to 28.3% in 2012 from 27.2% in
2011, mainly due to the partial recovery in average sales prices pursuant to applicable regulations during 2012, which helped to offset the rise in production costs. In 2012, lifting costs increased 37.7% to Ps. 58.1 per boe from Ps.
42.2 per boe in 2011, primarily as a consequence of an increase in oil service rates.

Gross profit for
operations outside of Argentina totalled Ps. 75 million in 2012 and 2011, with a gross margin on sales of 43.6% and 46.9% in 2012 and 2011, respectively.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 80 million to Ps. 263 million in 2012 from Ps. 183 million in 2011, mainly as a
consequence of the consolidation of PELSAs operations in 2012 following our acquisition of a controlling interest in that entity, the administrative and selling expenses of which totalled Ps. 61 million, and, to a lesser extent, of
incremental selling expenses corresponding to the rise in sales.

Exploration expenses:Exploration expenses totalled Ps. 212 million in 2012 compared to Ps. 391 million in 2011, all of which expenses in each year were attributable to operations in Argentina. In 2012, such expenses were mainly related to the
abandonment of onshore exploration wells, while in 2011 they were largely derived form abandonment of offshore exploration wells. Expenses for unsuccessful wells totalled Ps. 168 million in 2012 compared to Ps. 294 million in 2011.



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Other operating expenses, net: Other operating
expenses, net, declined in 2012 by Ps. 371 million, totaling Ps. 194 million and Ps. 565 million in 2012 and 2011, respectively. This decrease is mainly attributable to reduced losses in 2012 of Ps. 200 million from environmental
matters relating to water and soil remediation and waste disposal and Ps. 93 million form impairment charges on operations in Ecuador.

Share of profit of equity accounted investees: Losses resulting from our share of profit of equity accounted investees decreased by Ps. 10 million in 2012, to Ps. 126 million in
2012 compared to a loss of Ps. 136 million in 2011. This decrease in loss is mainly attributable to mixed-ownership companies in Venezuela. See Analysis of Share of Profit of Equity Accounted Investees.

Refining and Distribution

Operating income:Operating income decreased by Ps. 233 million to Ps. 12 million in 2012 from Ps. 245 million in 2011.

Sales: Sales decreased by Ps. 394 million, or 5.4%, to Ps. 7.0 billion in 2012 from
Ps. 7,4 billion in 2011, mainly as a consequence of the effect of lower sales volumes which were mitigated by a partial recovery in average sales prices pursuant to applicable regulations during 2012, including improvements of about 30% in
refined products. Lower sales volumes were largely attributable to the sale of the San Lorenzo refinery and the associated fuel sales network. In addition, in 2012 our catalytic reformer plant operations were transferred to the Petrochemicals
segment, which operations had accounted for 413 thousand cubic meters and sales of Ps. 700 million in 2011.

Processed crude oil volumes at our refineries decreased by 2.7 million barrels in 2012, from 13.2 million barrels in 2011 to 10.5 million barrels in 2012, mainly as a result of the sale of
the San Lorenzo refinery, which had accounted for processed oil volumes of 3.4 million barrels in 2011 (through April 30, 2011). Processed crude oil volumes at the Bahía Blanca refinery increased 7.1% to 10.5 million barrels in
2012 from 9.8 million barrels in 2011, consistent with an increased market demand for relevant products.

Crude oil sales to third parties increased by Ps. 175 million, or 22.7%, to Ps. 946 million in 2012 from
Ps. 771 million in 2011, mainly as a consequence of an improvement in average sales prices consistent with international reference prices.

In 2012, volumes of refined products decreased 30.7% to 1,992 thousand cubic meters from 2,876 thousand cubic meters in 2011. These lower sales volumes were principally attributable to the
transfer of the catalytic reformer plant operations to the Petrochemicals segment, and the sale of the San Lorenzo refinery and the associated fuel sales network.

In 2012, sales volumes of diesel, gasoline, fuel oil, and IFOs and other oil-related products totalled 791 thousand
cubic meters, 547 thousand cubic meters, 461 thousand cubic meters and 194 thousand cubic meters, respectively.

In 2011, sales volumes of these same products totalled 1,091 thousand cubic meters, 739 thousand cubic meters, 522 thousand cubic meters and 525 thousand cubic meters, respectively.

Gross profit: Gross profit declined by Ps. 159 million, or 21.7%, to Ps. 573 million
in 2012 from Ps. 732 million in 2011, as a result of the sale of the San Lorenzo refinery and the associated fuel sales network, the transfer of the catalytic reformer plant operations to the Petrochemicals segment, and a rise in crude oil
acquisition costs that could only be partially passed through to sales prices. As a result, our margin on sales decreased to 8.2% in 2012 from 10% in 2011.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 53 million, to Ps. 585 million in 2012 from Ps. 532 million in 2011, mainly as a
consequence of incremental selling expenses corresponding to the rise in sales.

Other operating
expenses, net: Other operating expenses, net, declined in 2012 by Ps. 35 million, totaling again of Ps. 13 million in 2012 and a loss of Ps. 22 million in 2011. This change is mainly attributable to reduced losses in
2012 of Ps. 37 million from environmental matters relating to water and soil remediation and waste disposal.

Share of profit of equity accounted investees: Earnings resulting from our share of profit of equity accounted investees decreased by Ps. 56 million in 2012, to Ps. 11 million in
2012 compared to of Ps. 67 million in 2011. This decrease is attributable to Refinor. See Analysis of Share of Profit of Equity Accounted Investees.

Petrochemicals

Operating income:Operating
income increased by Ps. 19 million, to Ps. 152 million from Ps. 133 million in 2011.



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Sales: Sales increased by Ps. 1.1 billion, or 61.2%, to
Ps. 2.9 billion in 2012 from Ps. 1.8 billion in 2011, mainly as a result of the incorporation of the catalytic reformer plant operations, which accounted for sales of Ps. 1 billion in 2012 (shown in 2011 under the Refining and Distribution segment).
An increase of Ps. 84 million in styrenics sales revenues in Argentina to Ps. 1.9 billion in 2012 from Ps. 1.8 billion in 2011 had a small positive impact, mainly as a result of a 10% improvement in average sales prices, which was partially
offset by a 4.8% decrease in sales volumes to 207.6 thousand tons in 2012 from 218.1 thousand tons in 2011.

In 2012, average sales prices in pesos in the styrene, polystyrene and synthetic rubber lines increased approximately 11%, 12% and 2%, respectively, compared to 2011.

Performance of the main styrenic products in 2012 was as follows:

(a) As a consequence of raw materials shortages, styrene sales volumes totalled 94.6 thousand tons,
accounting for a 12.6% decrease compared to the previous year, reflected in a lower level of exports to Brazil.

(b) Polystyrene sales volumes totalled 55.4 thousand tons, accounting for a 3.1% increase. Domestic sales grew 11% as a consequence of the substitution of imports.

(c) Sales volumes of BOPS in 2012 totalled 11.2 thousand tons, accounting for a 20% increase compared
to 2011. This increase is explained by the low level of sales in 2011 as a consequence of labor strikes and an unscheduled plant shutdown.

(d) Synthetic rubber sales volumes totalled 46.4 thousand tons, which were similar to the level of 46.8 thousand tons recorded in 2011.

Gross profit: Gross profit decreased by Ps. 17 million, or 7.1%, to Ps. 224 million in 2012 from
Ps. 241 million in 2011.

In 2012, incorporation of the catalytic reformer plant operations accounted for
gross profit of Ps. 35 million, with a 3.5% gross margin, which was adversely affected by a plant shutdown in the first semester of 2012. As a result, supplies were imported at costs significantly higher than the Companys own production
costs.

In 2012, gross margin on sales of styrenics decreased to 8.1% from 12.5% in 2011, as a result of the
combined effect of an increase in raw materials costs that could only be partially passed through to sales prices due to the decline in international spreads, and the above mentioned decrease in sales volumes.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 29 million,
to Ps. 110 million in 2012 from Ps. 81 million in 2011, mainly as a consequence of incremental selling expenses corresponding to the rise in sales.

Other operating expenses, net: Other operating expenses, net, totalled a gain of Ps. 38 million in 2012 and a loss of Ps. 27 million in 2011. The charge for 2011 is mainly
attributable to environmental matters relating to water and soil remediation and waste disposal.

Gas and Energy

Operating income:Operating income for the Gas and Energy business segment (which is
comprised of Electricity Generation and Marketing and Transportation of Gas, as discussed below) decreased by Ps. 31 million, or 5.4%, to Ps. 548 million from Ps. 579 million in 2012. Eliminations relating to sales between the
Electricity Generation and Marketing and Transportation of Gas segments accounted for Ps. (60) million and Ps. 83 million, in 2012 and 2011, respectively.

Gross profit: Gross profit in 2012 decreased by Ps. 134 million, or 23.6%, to Ps. 433 million
from Ps. 567 million in 2011, mainly in the Electricity Generation and, to a lesser extent, in the Hydrocarbons Marketing and Transportation operations.

Administrative and selling expenses: Administrative and selling expenses increased by Ps. 17 million, to Ps. 76 million in 2012 from Ps. 59 million in 2011, mainly as a
consequence of incremental selling expenses corresponding to the rise in sales.

Other operating
expenses, net: Other operating expenses, net, totalled gains of Ps. 224 million in 2012 and Ps. 38 million in 2011, respectively. The increase in gain is mainly attributable to the restructuring of CIESAs debt, which
accounted for a gain of Ps. 221 million in 2012.

Share of profit of equity accounted
investees: Earnings resulting from our share of profit of equity accounted investees decreased by Ps. 66 million in 2012, to a loss of Ps. 33 million in 2012 compared to a gain of Ps. 33 million in 2011. This change is mainly
attributable to our investments in CIESA /TGS and Distrilec/EDESUR. See Analysis of Share of Profit of Equity Accounted Investees.



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Electricity Generation

Operating income:Operating income decreased by Ps. 107 million, or 29.3%, to Ps. 258 million in
2012 from Ps. 365 million in 2011.

Sales: Sales rose Ps. 141 million, or 9.7%, to Ps.
1.6 billion in 2012 from Ps. 1.5 billion in 2011, mainly as a consequence of increased electricity generation and sales attributable to the Genelba Plus and Genelba power plants and the initiation of operations at the new Ecoenergía power
plant.

Genelba Plus sales rose Ps. 2, or 0.5%, to Ps. 443 million in 2012 from Ps. 441 million in
2011, due to the combined effect of increases in sales volumes and average sales prices. Sales volumes rose to 1,303 GWh from 1,174 GWh in 2011, due to an increased hiring level and contract utilization factor. This power plants availability
factor was higher than 99% in both fiscal years.

Genelba power plant sales increased by Ps. 27 million,
or 4%, to Ps. 787 million in 2012 from Ps. 889 million in 2011. The increase in sales was attributable to the rise in sales volumes, partially offset by a decline in average sales prices, mainly because recognition in operation and
maintenance costs and power price was reduced as a result of the expiration of the agreement between generators and the SE. Electricity sales for 2012 rose 18.4% to 5,520 GWh from 4,662 GWh in 2011, principally due to scheduled maintenance works
performed in 2011. Within this context, this power plants availability factor and this plant factor were 99.1% and 95.7% in 2012 and 98.8% and 87.1% in 2011, respectively.

Sales attributable to HPPL decreased by Ps. 12 million, or 9%, to Ps. 122 million in 2012 from Ps.
134 million in 2011, mainly as a result of a 9.6% decline in sales volumes to 891 GWh from 985 GWh, as a consequence of reduced water flows in the Comahue basin.

Gross profit: In 2012, gross profit decreased by Ps. 85 million, or 23%, to Ps. 285 million from
Ps. 386 million in 2011, principally due to a reduced margin on sales attributable to the Genelba power plant as a consequence of non-renewal of the agreement between generators and the SE, increased costs in dollars and the fact that the cap
spot price for energy remained at Ps. 120/MWh. Along these lines, generation margin attributable to HPPL was adversely affected by reduced water flows in the Comahue basin. Our margin on sales attributable to all power plants decreased to 17.6% in
2012 from 26.2% in 2011.

Marketing and Transportation of Gas

Operating income: Operating income increased Ps. 178 million, to Ps. 350 million in 2012 from Ps.
172 million in 2011.

Sales:Sales revenues rose Ps. 38 million, or 2.8%, to Ps. 1.5
billion in 2012 from Ps. 1.4 billion in 2011, mainly as a result of increased revenues from gas sales, which were partially offset by a decline in liquid fuel sales. Gas and LPG brokerage services totalled Ps. 28 million in 2012 and Ps.
24 million in 2011.

Revenues from gas sales increased by Ps. 184 million, or 19.3%, to Ps. 1.1
billion from Ps. 953 million in 2011, principally due to a 29.3% rise in average sales prices, as a consequence of an improvement in the price of sales to industrial customers, and sales of non-conventional gas at the Gas Plus
price. These effects were partially offset by a change in the customers mix, with an increased share of residential customers meaning lower sales prices. Daily sales volumes declined 7.7% to 289 thousand cubic feet in 2012 from
313 thousand cubic feet in 2011.

Revenues from liquid fuel sales decreased by Ps. 151 million, or
33.9%, to Ps. 291 million in 2012 from Ps. 445 million in 2011, mainly due to a 37% decline in sales volumes to 137 thousand tons in 2012 from 219 thousand tons in 2011, as a result of reduced availability of gas to be processed
in 2012.

Gross profit: Gross profit decreased by Ps. 53 million, or 29.3%, to Ps.
128 million in 2012 from Ps. 181 million in 2011 and gross margin on sales declined to 10.2% in 2012 from 10.9 % in 2011. These declines are mainly attributable to the decrease in liquid fuel and natural gas volumes and the negative
impact on transportation costs for the liquid fuel business of the charge imposed by Resolution No. 2,067 issued by the SE. These effects were partially offset by the above mentioned improvement in the price of gas sales to industrial customers
and sales of non-conventional gas at the Gas Plus price.



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ANALYSIS OF SHARE OF PROFIT OF EQUITY ACCOUNTED INVESTEES

The table below shows the Companys share of profit of equity accounted investees for 2012 and 2011.



|                                                         |  |                                 |      |   |      |  |      |  
|-------------------------------------------------------- |  | ------------------------------- | ---- | - | ---- |  | ---- | -
|                                                         |  | For the year ended December 31, |     
|                                                         |  | 2012                            |      |   | 2011 | 
|                                                         |  | (in millions of pesos)          |     
|CIESA (Gas and Energy)                                   |  |                                 | 219  |   |      |  | 121  |  
|Distrilec S.A (Gas and Energy)                           |  |                                 | (253 | ) |      |  | (90  | )
|Mixed-ownership companies in Venezuela (Oil and Gas E&P) |  |                                 | (162 | ) |      |  | (176 | )
|Petrolera Entre Lomas S.A (Oil and Gas E&P)              |  |                                 | 26   |   |      |  | 40   |  
|Refinería del Norte S.A. (Refining and Distribution)     |  |                                 | 11   |   |      |  | 67   |  
|Others                                                   |  |                                 | 11   |   |      |  | 2    |  
|                                                         |  |                                 |      |   |      |  |      |  
|Total                                                    |  |                                 | (148 | ) |      |  | (36  | )
|                                                         |  |                                 |      |   |      |  |      |  

Losses resulting from our share of profit of equity accounted investees increased by Ps.
112 million in 2012, from Ps. 36 million in 2011 to Ps. 148 million in 2012, mainly as a result of a greater loss from Distrilec and reduced gain derived from Refinor and PELSA. These effects were partially offset by higher gains
resulting from CIESA.

CIESA / TGS: In 2012 and 2011, our share of profit of equity in CIESA
accounted for gains of Ps. 219 million and Ps. 121 million, respectively. The improvement in 2012 is mainly attributable to the positive effects of the restructuring of CIESAs debt in July 2012, resulting in the recognition of a gain
of Ps. 165 million. In 2011, CIESA recorded gains of Ps. 118 million from reversal of allowances on deferred assets. In addition, CIESAs reduced financial expenses resulting from the restructuring of its debt in 2012 had a positive
impact.

Distrilec / EDESUR: Our share of profit of equity in Distrilec accounted for losses of
Ps. 253 million and Ps. 90 million in 2012 and 2011, respectively. The greater loss in the year 2012 is mainly attributable to the deterioration of EDESURs operating results, which were adversely affected by an increase in operating
costs without a corresponding recognition and passing through of such increased costs to tariffs.

Mixed-ownership companies in Venezuela: Our share of profit of equity in mixed-ownership companies in
Venezuela accounted for losses of Ps. 162 million and Ps. 176 million in 2012 and 2011, respectively, which included writedowns of Ps. 260 million and Ps. 281 million in 2012 and 2011, respectively.

Refinor: Our share of profit of equity in Refinor accounted for a decrease in gain of Ps. 56 million
in 2012, to a gain of Ps. 11 million in 2012 from a gain of Ps. 67 million in 2011, mainly as a result of a decline in Refinors operating results, principally derived from increases in the costs of raw materials and production
expenses, which could only partially be passed through to sales prices.

PELSA: As of
June 1, 2012 the Company acquired control of PELSA. For such reason, until May 31, 2012, the Company recognized share of profit of equity in PELSA by applying the equity method of accounting, with gains of Ps. 26 million and Ps.
40 million in the five-month period ended May 31, 2012 and in the fiscal year 2011, respectively.



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CRITICAL ACCOUNTING POLICIES

The preparation of financial statements in conformity with IFRS requires management to make judgments, estimates and
assumptions that affect the application of accounting policies and the reported amounts of assets, liabilities, income and expenses. Changes in facts and circumstances or discovery of new information may result in revised estimates and actual
results may differ from these estimates.

Estimates and underlying assumptions are reviewed on an ongoing
basis. Revisions to accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected.

The following summary provides more information about the critical accounting policies that could have a significant impact on our results and should be read in conjunction with the Notes to our Audited
Consolidated Financial Statements. Our accounting policies are more fully described in Notes 2 and 3 to our financial statements.

Estimates of Oil and Gas Reserves

Evaluations of oil and gas reserves are important for the effective management of upstream assets. They are used to make investment decisions about oil and gas properties. Oil and gas reserves quantities
are also used as the basis for calculation of unit-of-production rates for depreciation of the related oil and gas assets and evaluation for impairment of our investments in upstream assets.

Estimates of oil and gas reserves have been prepared in accordance with Rule 4-10 of Regulation S-X, promulgated by
the SEC.

Reserves means oil and gas volumes (in cubic meters of oil equivalent) that are
economically producible, in the areas where the Company operates or has a (direct or indirect) interest and over which the Company has exploitation rights, including oil and gas volumes related to those service agreements under which the Company has
no ownership rights on the reserves or the hydrocarbons obtained, and those estimated to be produced for the contracting company under service contracts.

There are numerous uncertainties in estimating proved reserves and future production profiles, development costs and prices, including several factors beyond the producers control. Reserves
engineering is a subjective process of estimating underground accumulations involving a certain degree of uncertainty. Reserves estimates depend on the quality of the available engineering and geological data as of the estimation date and on the
interpretation and judgment thereof.

Reserves estimates are adjusted when so justified by changes in the
evaluation criteria, or at least once a year. These reserves estimates have considered the estimations of oil and gas consulting professionals.

Downward revision in our reserves estimates may result in: (a) higher depreciation and depletion charges in future periods, and/or (b) an immediate write-down of an assets book value. If,
on the other hand, the oil and gas reserves quantities were to be revised upward, our per barrel depreciation and depletion expense would be lower. Changes in proved oil and gas reserves will also affect the standardized measure of discounted cash
flows presented under Item 18 of Form 20-F.

Impairment of Assets

Property, plant and equipment

As of
December 31, 2013, our property, plant and equipment, net of accumulated depletion, amounted to Ps. 9.5 billion.

Our management assesses the recoverability of property, plant and equipment items whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. The book value of
property, plant and equipment asset is adjusted down to its recoverable value if its carrying amount exceeds the latter.

From a regulatory standpoint, recoverable value is defined as the higher of (i) fair value less selling costs and (ii) value in use, the latter being defined as the addition of the discounted
expected net cash flows that arise as a direct result of the use and eventual final disposition of the assets. To such end, among other elements, the premises that represent the best estimate made by management of the economic conditions that will
prevail throughout the useful life of the assets are considered.

For the purpose of assessing recoverability
of non-financial assets, assets are grouped at the lowest levels for which there are individually identifiable cash flows (cash generating units). For this purpose, each associated company and each jointly controlled company is considered a cash
generating unit.



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Discount rates used to calculate the value in use are the respective
weighted average cost of capital (WACC). For each asset or cash generating unit a specific WACC is determined that considers the business segment and the country conditions where the operations are performed.

In subsequent periods, reversal of an impairment charge is evaluated if there are changes in the assumptions used to
determine the asset recoverable value. In such a case, the book value of the asset or cash generating unit is written up to the lower of: (a) the book value that the asset or cash generating unit would have had if the impairment had never been
recognized; and (b) its recoverable value.

As of December 31, 2013 the Company recognized an
impairment charge of Ps. 11 million on property, plant and equipment.

As of December 31, 2012,
2011, and 2010, the Company did not recognize any impairment charge on property, plant and equipment.

Equity investees

We estimate fair value for the measurement of the Companys equity investees during certain
impairment tests. The recoverability of the investments is highly sensitive to crude oil price volatility, economic, social and regulatory changes and, particularly, to the resulting business plans. In determining fair value, the Company utilizes
our managements best assumptions regarding prices based on business plans, production curves, transaction costs at market value and investment needs to develop the reserves of equity investees. Discount rates used to measure fair value
consider the type of asset involved, the business segment and the country where operations are conducted. The Companys estimates are inherently imprecise because they reflect our managements expectation of future conditions that are
often outside our managements control.

In 2013, 2012 and 2011, for example, the Company recognized
impairment charges for its equity investees that are mixed-ownership companies in Venezuela totaling Ps. 470 million, Ps. 260 million, and Ps. 281 million, respectively.

Successful Efforts Method of Accounting and Well Abandonment Liabilities

We use the successful efforts method of accounting for our oil and gas exploration and production activities. This method involves the capitalization of: (i) the cost of acquiring properties in oil
and gas exploration and production areas: (ii) the cost of drilling and equipping exploratory wells that result in the discovery of commercially recoverable reserves; (iii) the cost of drilling and equipping development wells, and
(iv) the estimated future costs of well abandonment and restoration.

According to the successful efforts
method of accounting, exploration costs, excluding exploratory well costs, are expensed during the period in which they are incurred. Drilling costs of exploratory wells are capitalized until determination is made on whether the drilling resulted in
proved reserves that justify the commercial development. If reserves are not found, such drilling costs are expensed. Occasionally, an exploratory well may determine the existence of oil and gas reserves but the reserves cannot be classified as
proved when drilling is complete. In those cases, in accordance with ASC Topic 932, such costs continue to be capitalized insofar as the well has permitted determination of the existence of sufficient reserves to warrant its completion as a
production well and we are making sufficient progress in evaluating the economic and operating feasibility of the project. Expenses for unsuccessful wells totalled Ps. 27 million, Ps. 168 million and Ps. 294 million in 2013, 2012 and
2011, respectively. As of December 31, 2013, we maintained capitalized exploratory well costs amounting to Ps. 298 million.

Estimated future well abandonment and restoration costs in hydrocarbons areas, discounted at a current rate, are capitalized in the cost of the assets and depreciated using the units of production method.
Additionally, a liability at the estimated value of the discounted amounts payable is recognized. Well abandonment liabilities when operations cease give rise to the estimation of time and amount of abandonment costs by the Companys
management. Technology, costs and political, environmental, safety and public relations considerations constantly change and may give rise to differences between actual future costs and estimates.

Contingencies

The Company is subject to various claims, lawsuits and other legal proceedings that arise during the ordinary course of its business. Our liabilities with respect to such claims, lawsuits and other legal
proceedings cannot be estimated with certainty. Periodically, our management reviews the status of each contingency and assesses the potential financial liabilities, for which it develops the estimates mainly with the assistance of legal advisors.

Contingencies include outstanding lawsuits or claims for possible damages caused to third parties in the
ordinary course of the Companys business, as well as third party claims arising from disputes concerning the interpretation of legislation.



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The Company evaluates whether there would be additional expenses directly
associated with the ultimate resolution of each contingency, which are to be included in a provision if they are reasonably estimable. If the assessment indicates that a potential loss contingency is not probable but is reasonably possible, or is
probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the possibility of occurrence, is disclosed in a note to the financial statements. Loss contingencies considered remote are not disclosed
unless they involve guarantees, in which case the nature of the guarantee is disclosed.

Changes in the facts
or circumstances related to these types of contingencies, as well as the future outcome of these disputes, can have a significant effect on the amount of provisions for contingencies recorded. As of December 31, 2013, contingent liabilities in
our financial statements (including those current and non-current) amounted to Ps. 319 million.

Environmental costs

The costs incurred to limit, neutralize or prevent environmental pollution are only capitalized if at least one of the
following conditions is met: (a) such costs relate to improvements in safety; (b) the risk of environmental pollution is prevented or limited; or (c) the costs are incurred to prepare the assets for sale and the book value (which
considers those costs) of such assets does not exceed their respective recoverable value.

Liabilities related
to future remediation costs are recorded when, on the basis of environmental assessments, such liabilities are probable to materialize, and costs can be reasonably estimated. The actual recognition and amount of these provisions are generally based
on the Companys commitment to an action plan, such as an approved remediation plan or the sale or disposal of an asset. The provision is recognized on the basis that a future remediation commitment will be required.

The Company measures liabilities based on its best estimation of present value of future costs, using currently available
technology and applying current environmental laws and regulations as well as the Companys own internal environmental policies.

Changes in the facts or circumstances related to these types of liabilities may give rise to differences between actual future costs and estimates. As of December 31, 2013, reserves for environmental
remediation (including those current and non-current) amounted to Ps. 155 million.

Employees defined benefits

Liabilities related to employees defined benefits are recorded based on the estimated cost of post-retirement
benefits granted to employees. For purposes of determining that cost, the Company uses actuarial calculation methods and makes estimates with respect to applicable demographic and financial variables. The amount recognized as liability attributable
to such benefits represents the addition of the present value of the obligation, net of the present value of the assets of the plan, with which the obligations will be settled.

Changes in assumptions related to these types of liabilities may give rise to differences between actual future costs and
estimates. As of December 31, 2013, related benefit liabilities amounted to Ps. 336 million.



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LIQUIDITY AND CAPITAL RESOURCES

The default on Argentine sovereign debt at the end of 2001, the global financial crisis and related decline in global
stock markets as well as the insolvency of major financial institutions toward the end of 2008, and the current global economic slowdown, among other factors, have all significantly limited the ability of Argentine companies to access international
financial markets at reasonable cost and conditions. See Item 3. Key InformationRisk Factors.

Our ability to execute and carry out our strategic business plan depends upon our ability to obtain financing at a
reasonable cost and on reasonable terms.

In previous years, we had regularly obtained financing from the
private pension fund system in Argentina, which had been a significant participant in the domestic capital market and a subscriber of issuances of our debt. However, in November 2008 the Argentine Congress enacted a law eliminating the private
pension system, mandating that funds administered by the AFJP, be transferred to a new administrator, the ANSES. The nationalization of private pension funds and the transfer of their assets to a state-run administrator led to a decline in liquidity
in the local capital markets, and further limited the sources of financing for Argentine companies, including us.

In response to the limited availability of financing for Argentine companies, we closely monitor our liquidity levels in order to ensure compliance with our financial obligations and achieve our
profitability objectives. Along these lines, and as a guiding principle, financial solvency is the foundation on which sustainable development of our businesses is built.

Pursuant to these strategic guidelines, we seek to:



| |  |  | Design a capital structure consistent with industry standards adaptable to the financial markets in which we operate;
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | Maintain a liquidity level  invested in financial assets with high credit qualitythat allows us to meet our obligations;
| | - |  | --------------------------------------------------------------------------------------------------------------------------



| |  |  | Maintain a debt maturity profile consistent with projected cash generation; and
| | - |  | -------------------------------------------------------------------------------



| |  |  | Efficiently manage borrowing costs.
| | - |  | -----------------------------------

Adhering to these guidelines enables us to treat financial management as a key element in the value-creation process.

Financial management highlights for the 2013 fiscal year include:



| |  |  | The timely payment of our Class R corporate bond in the amount of US$209 million reducing our level of financial indebtedness to approximately
U.S.$300 million, as of December 31, 2013; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Continued implementation of our capital expenditures plan.
| | - |  | ----------------------------------------------------------

The most significant factors generally affecting our cash flow from operating activities are: fluctuations in prices for
crude oil and oil related products; fluctuations in production levels and demand for our products; fluctuations in margins in the Refining and Distribution and Petrochemicals business segments; changes in regulations, such as taxes, taxes on
exports, changes in royalty payments and price controls; fluctuations in exchange and interest rates; and our oil and gas reserves replacement capacity.

Analysis of Liquidity and Capital Resources

The
table below reflects our statements of cash flow for the fiscal years ended December 31, 2013, 2012 and 2011 under IFRS. Amounts are stated in millions of pesos.



|                                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|------------------------------------------------------ |  | ------------------------------- | ------ | - | ---- |  | ------ | ---- |  |  | ------ | -
|                                                       |  | For the year ended December 31, |       
|                                                       |  | 2013                            |        |   | 2012 |  |        | 2011 | 
|Cash and cash equivalents at the beginning of the year |  |                                 | 1,260  |   |      |  | 1,192  |      |  |  | 2,113  |  
|Net cash provided by operations                        |  |                                 | 2,778  |   |      |  | 2,902  |      |  |  | 1,695  |  
|Net cash (used in) generated by investing activities   |  |                                 | (1,850 | ) |      |  | (2,579 | )    |  |  | (772   | )
|Net cash used in financing activities                  |  |                                 | (1,173 | ) |      |  | (312   | )    |  |  | (1,931 | )
|Effect of exchange rate changes on cash                |  |                                 | 178    |   |      |  | 57     |      |  |  | 87     |  
|                                                       |  |                                 |        |   |      |  |        |      |  |  |        |  
|Cash and cash equivalents at the end of the year       |  |                                 | 1,193  |   |      |  | 1,260  |      |  |  | 1,192  |  
|                                                       |  |                                 |        |   |      |  |        |      |  |  |        |  



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Cash

As of December 31, 2013, 2012 and 2011, cash and cash equivalents were Ps. 1.2 billion, Ps. 1.3 billion and Ps. 1.2
billion, respectively.

Our goal is to maintain excess cash primarily in short-term investments to ensure
adequate liquidity levels. We primarily invest in money market mutual funds, overnight deposits and term deposits.

On October 25, 2011, the Argentine government issued Decree No. 1,722/11 providing that all foreign currency revenues obtained from exports made by mining and oil and gas companies must be
repatriated and sold within the local foreign exchange market, which is the general regime applicable to revenues generated by Argentine exports. This decree requires PESA to repatriate and sell in the local foreign exchange market all of its export
proceeds.

Subsequently, during April and May 2012, Resolutions No. 142/12 and No. 231/12 issued by
the Ministry of Economy, and Communication A 5300 issued by the Central bank provided for a reduction in the period of time during which the exchange into local currency of all foreign exchange proceeds from exports must be performed.
See Item 3. Key InformationRisk FactorsFactors Relating to ArgentinaGovernment intervention in the Argentine economy could adversely affect our results of operations or financial condition, Item 3. Key
InformationExchange Rates, Item 3. Key InformationExchange controls and Item 5. Operating and Financial Review and ProspectsDescription of Indebtedness.

Operating Activities

Net cash from operations totalled Ps. 2.8 billion in 2013, Ps. 2.9 billion in 2012 and Ps. 1.7 billion in 2011.

Net cash from operations decreased by Ps. 124 million, or 4.3%, to Ps. 2.8 billion in 2013, from Ps. 2.9 billion in 2012, mainly as a result of increased plant shutdowns and environmental remediation
expenses.

Net cash from operations increased by Ps. 1.2 billion, or 71.2%, to Ps. 2.9 billion in 2012, from
Ps. 1.7 billion in 2011, mainly as a result of an improvement in gross profit, which was partially offset by a decrease in dividends collected and increased income tax payments, consistent with our improved results for the year 2012.

Investing Activities

Net cash used in investing activities totalled Ps. 1.8 billion in 2013, Ps. 2.6 billion in 2012 and Ps. 772 million in 2011, as detailed in the table below. Amounts are stated in million of pesos:



|                                                     |  |      |        |   |      |  |        |      |  |  |        |  
|---------------------------------------------------- |  | ---- | ------ | - | ---- |  | ------ | ---- |  |  | ------ | -
|                                                     |  | 2013 |        |   | 2012 |  |        | 2011 | 
|Divestments                                          |  |      | 605    |   |      |  | 108    |      |  |  | 1,015  |  
|Capital expenditures                                 |  |      | (2,524 | ) |      |  | (2,999 | )    |  |  | (1,763 | )
|CIESAs debt restructuring                           |  |      |       |   |      |  | 195    |      |  |  |       |  
|Discontinued operations                              |  |      |       |   |      |  |       |      |  |  | (77    | )
|Other                                                |  |      | 69     |   |      |  | 117    |      |  |  | 53     |  
|                                                     |  |      |        |   |      |  |        |      |  |  |        |  
|Net cash (used in) generated by investing activities |  |      | (1,850 | ) |      |  | (2,579 | )    |  |  | (772   | )
|                                                     |  |      |        |   |      |  |        |      |  |  |        |  

The Ps. 729 million decrease in cash used in investing activities in 2013 is mainly
due to reduced capital expenditures and increased cash from divestments.

The Ps. 1.8 billion increase in cash
used in investing activities in 2012 is mainly due to increased capital expenditures and reduced cash from divestments. The result for 2011 was mainly attributable to the receipt of proceeds from the sale of Innova in March 2011.

In 2012, CIESAs financial debt restructuring process was successfully completed and generated Ps. 195 million
of cash.



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The table below reflects total capital expenditures net of divestments, in
millions of pesos:



|                                         |  |      |       |   |      |  |       |      |  |  |       |  
|---------------------------------------- |  | ---- | ----- | - | ---- |  | ----- | ---- |  |  | ----- | -
|                                         |  | 2013 |       |   | 2012 |  |       | 2011 | 
| Oil and Gas Exploration and Production |  |      | 2,237 |   |      |  | 2,725 |      |  |  | 1,420 |  
| Petrochemicals                         |  |      | 101   |   |      |  | 60    |      |  |  | 42    |  
| Refining and Distribution              |  |      | 166   |   |      |  | 192   |      |  |  | 161   |  
| Gas and Energy                         |  |      | 6     |   |      |  | 14    |      |  |  | 127   |  
| Corporate                              |  |      | 14    |   |      |  | 8     |      |  |  | 13    |  
|                                         |  |      |       |   |      |  |       |      |  |  |       |  
|Total capital expenditures               |  |      | 2,524 |   |      |  | 2,999 |      |  |  | 1,763 |  
| Divestments                            |  |      | (605  | ) |      |  | (108  | )    |  |  | (938  | )
|                                         |  |      |       |   |      |  |       |      |  |  |       |  
|Total net capital expenditures           |  |      | 1,919 |   |      |  | 2,891 |      |  |  | 825   |  
|                                         |  |      |       |   |      |  |       |      |  |  |       |  



| |  |  | Oil and Gas Exploration and Production
| | - |  | --------------------------------------

Capital expenditures in the Oil and Gas Exploration and Production business segment totalled Ps. 2.2 billion, Ps. 2.7
billion and Ps. 1.4 billion in 2013, 2012 and 2011, respectively. The increased capital expenditures in 2012 are mainly attributable to acquisition of an additional 39.671% equity interest in PELSA, for an amount of U.S.$249.4 million. As a result
of this transaction, a cash payment of Ps. 1,005 million was recognized and is shown net of cash available in PELSA at the time of the acquisition. In addition, capital expenditures in 2013 and 2012 include Ps. 559 y 253 million
attributable to consolidation of PELSAs operations as from June 1, 2012.

During 2013, 2012 and
2011, capital expenditures were mainly focused on improving the basic production curve, on exploration activities and on development of non-conventional gas reserves for shale oil and shale gas. Main expenditures included well drilling, expansion of
secondary recovery projects and expansion of surface facilities and compression systems. Capital expenditures were focused on Argentina, primarily in seismic surveys and drilling.

In 2013, our investment plan involved drilling of 51 producing and injection wells and repair of 87 wells, mainly in the
Neuquén basin, in Puesto Hernández, Medanito, El Mangrullo, Sierra Chata, Aguada de la Arena and Río Neuquén areas. In the Austral basin, investments were mainly focused on Estancia Agua Fresca and La Paz areas. In 2012,
our investment plan involved drilling of 54 producing and injection wells and repair of 90 wells, mainly in the Neuquén basin, in the Puesto Hernández, Medanito, El Mangrullo, Sierra Chata, Aguada de la Arena and Río
Neuquén areas. In the Austral basin, start-up of a new crude oil treatment plant took place in the Estancia Agua Fresca area in 2011, which allowed us to increase crude oil processing capacity in that area.



| |  |  | Refining and Distribution
| | - |  | -------------------------

Capital expenditures in the Refining and Distribution business segment totalled Ps. 166 million, Ps. 192 million and Ps. 161 million during 2013, 2012 and 2011, respectively.

During 2013, the Companys investments were made principally in the Bahía Blanca Refinery to improve loading
and unloading facilities for vessels, the dispatch plant and to introduce new safety and environment-related technologies.

In addition, at the Dock Sud Plant, Caleta Paula and the Heavy Products Plant, investments were made to improve logistics and tank upgrading.

During 2012 and the fourth quarter of 2011, we continued to undertake comprehensive maintenance projects at our Ricardo
Eliçabe Refinery with a view to maintaining the mechanical integrity of its units, reliability and efficiency.

In 2012 and 2011, we continued with the implementation of the Refining Quality Adjustment Project in Bahía Blanca in order to meet sulphur content specifications set by Argentine law.

In addition, investments were made at the Dock Sud Plant to improve logistics.



| |  |  | Petrochemicals
| | - |  | --------------

In the Petrochemicals business segment, capital expenditures totalled Ps. 101 million, Ps. 60 million and Ps. 42 million in 2013, 2012 and 2011, respectively.

The most significant investments made in 2013 include, among others, investments to increase energy efficiency at the
Reforming Unit, increase recovery of Propellant Gas and diversify raw materials for crackers. In addition, the project for installation of a new monomer styrene storage tank and the fourth silo at Zárate Plant was completed, with the
consequent flexibilization in bulk deliveries.



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During 2012, the Company made investments at the Puerto General San
Martín plant, mainly directed toward upgrading its operating efficiency and improving storage and delivery facilities.

During 2011, we made investments in works to retrofit the synthetic rubber plant to support production of polymers that meet new European regulatory requirements.



| |  |  | Gas and Energy
| | - |  | --------------

In the Gas and Energy business segment, capital expenditures totalled Ps. 6 million, Ps. 14 million and Ps. 127 million in 2013, 2012 and 2011, respectively.

The investments made in 2011, were mainly attributable to the authorization for commercial operations of the
Ecoenergía power plant and major maintenance and extension of useful life of gas and steam turbines in the Genelba combined cycle.

Financing Activities

Net cash used in financing
activities totalled Ps. 1.2 billion, Ps. 312 million and Ps. 1.9 billion, in 2013, 2012 and 2011, respectively, as detailed in the table below in millions of pesos:



|                                 |  |      |        |   |      |  |      |      |  |  |        |  
|-------------------------------- |  | ---- | ------ | - | ---- |  | ---- | ---- |  |  | ------ | -
|                                 |  | 2013 |        |   | 2012 |  |      | 2011 | 
| Long-term debt payments        |  |      | (1,302 | ) |      |  | (85  | )    |  |  | (1,747 | )
| Short-term debt financing, net |  |      | 96     |   |      |  | 2    |      |  |  | (5     | )
| Dividends paid                 |  |      | (16    | ) |      |  | (229 | )    |  |  | (183   | )
| Discontinued operations        |  |      |       |   |      |  |     |      |  |  | 4      |  
| Long-term debt financing, net  |  |      | 49     |   |      |  |     |      |  |  |       |  
|                                 |  |      |        |   |      |  |      |      |  |  |        |  
|                                 |  |      | (1,173 | ) |      |  | (312 | )    |  |  | (1,931 | )
|                                 |  |      |        |   |      |  |      |      |  |  |        |  

We paid long-term debt in the amount of Ps. 1.3 billion, Ps. 85 million and Ps. 1.7
billion in 2013, 2012 and 2011, respectively.



| |  |  | In 2013, we paid Ps. 1.2 billion at maturity of our Class R Notes.
| | - |  | ------------------------------------------------------------------



| |  |  | Increased application of cash in 2011 was mainly attributable to the payment of long-term debt in the amount of Ps. 1.7 billion, of which Ps.
810 million, Ps. 579 million and Ps. 358 million corresponded to loans owed to Petrobras InternacionalBraspetro B.V., bank financing and our Class N Notes under the global notes program of PESA, respectively.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

We paid cash dividends in the amount of Ps. 211 million and Ps. 183 million in
2012 and 2011, respectively. In addition, PELSA paid Ps. 16 million and Ps. 18 million attributable to non-controlling interest in 2013 and 2012, respectively.

The Companys shareholders meeting held on March 29, 2012 resolved to capitalize retained earnings in an
amount of Ps. 1,009 million through the issuance of 1,009,618,410 common shares with a nominal value of Ps. 1 each and entitled to one vote per share. On September 4, 2012, the CNV and the Buenos Aires Stock Exchange authorized the
issuance and registration of such shares. This partial capitalization of retained earnings of the Company had the effect of doubling the number of our Class B shares outstanding.



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DESCRIPTION OF INDEBTEDNESS

Substantially all of our financial debt and the debt of our principal subsidiaries is denominated in U.S. dollars. The
description that follows describes the indebtedness of PESA and its consolidated subsidiaries.

As of
December 31, 2013, 2012 and 2011, total indebtedness totalled Ps. 2.2 billion, Ps. 2.7 billion and 2.2 billion, respectively, as detailed in the table below:



|                         |  |      |       |  |      |  |       |      |  |  |       | 
|------------------------ |  | ---- | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                         |  | 2013 |       |  | 2012 |  |       | 2011 | 
|Short-term debt:         |  |      |       |  |      |  |       |      |  |  |       | 
| Bonds                  |  |      | 15    |  |      |  | 1,008 |      |  |  | 24    | 
| Financial institutions |  |      | 193   |  |      |  | 100   |      |  |  | 16    | 
|                         |  |      |       |  |      |  |       |      |  |  |       | 
|                         |  |      | 208   |  |      |  | 1,108 |      |  |  | 40    | 
|                         |  |      |       |  |      |  |       |      |  |  |       | 
|Long-term debt:          |  |      |       |  |      |  |       |      |  |  |       | 
| Bonds                  |  |      | 1,943 |  |      |  | 1,469 |      |  |  | 2,144 | 
| Financial Institutions |  |      | 81    |  |      |  | 89    |      |  |  | 38    | 
|                         |  |      |       |  |      |  |       |      |  |  |       | 
|                         |  |      | 2,024 |  |      |  | 1,558 |      |  |  | 2,182 | 
|                         |  |      |       |  |      |  |       |      |  |  |       | 
|Total indebtedness       |  |      | 2,232 |  |      |  | 2,666 |      |  |  | 2,222 | 
|                         |  |      |       |  |      |  |       |      |  |  |       | 

As of December 31, 2013, an aggregate principal amount of U.S.$300 million of our
Obligaciones Negociables Serie S due 2017 (the Series S Notes), issued under our U.S.$2.5 billion global note program that expired in May 2008, remained outstanding.

Our Series S Notes, issued for a total nominal amount of U.S.$300 million, accrue interest at a 5.875% annual rate
and mature in May 2017. Under the documentation governing the Series S Notes, if a change of control (as defined therein) occurs, we must make an offer to repurchase from the holders any and all outstanding Series S Notes at a purchase
price equal to 101% of the aggregate principal amount of such notes outstanding, plus any accrued and unpaid interest thereon, through the purchase date. Our Series S Notes have the benefit of a credit enhancement pursuant to a standby purchase
agreement entered into by Petrobras, pursuant to which, in the case of a default by us in the payment of principal, interest or any other amounts owed under the Series S Notes, Petrobras would be obligated to purchase from the holders of such
notes, at their face value, all rights to receive payments arising thereunder.

The proceeds from the
issuances of these notes were used to refinance liabilities, increase working capital, make capital expenditures in Argentina or make capital contributions to subsidiaries and associates.

In addition, in August 2013, the CNV authorized a new corporate notes program for an outstanding principal amount not to
exceed U.S.$ 500 million or its equivalent in other currencies, maturing within a 5-year term or the maximum term that may be established by any applicable regulation in the future.

The following table represents our debt maturity profile as of December 31, 2013:



|                  |  |        |     |  |         |  |    |         |  |  |         |  |  |       |       |  |  |  |       | 
|----------------- |  | ------ | --- |  | ------- |  | -- | ------- |  |  | ------- |  |  | ----- | ----- |  |  |  | ----- | 
|                  |  | 1 year |     |  | 2 years |  |    | 3 years |  |  | 4 years |  |  | Total |      
|Millions of pesos |  |        | 208 |  |         |  | 55 |         |  |  | 26      |  |  |       | 1,943 |  |  |  | 2,232 | 

On June 9, 2005, the Argentine government issued Decree No. 616/05, requiring
that any cash inflow to the domestic market derived from foreign loans to the Argentine private sector shall have a maturity for repayment of at least 365 days as from the date of the cash inflow. In addition, at least 30% of the amount must be
deposited with domestic financial institutions. This deposit (1) must be registered, (2) must be non-transferable, (3) must be non-interest bearing, (4) must be made in U.S. dollars, (5) must have a term of 365 days and
(6) cannot be used as security or collateral in connection with other credit transactions. Export and import financing and primary public offerings of corporate bonds listed on self-regulated markets are exempt from the foregoing provisions,
among others. This decree may limit our ability to finance our operations through new loans (whether granted by Petrobras, any Petrobras related entity, our subsidiaries outside Argentina or any other foreign financial institution).

Under Central Bank Communication A 4860, issued on October 30, 2008, export collections required to be
transferred and settled in the local exchange market must be transferred within a ten working day term to foreign offices of local financial institutions, except for export collections applied to the payment of export pre-financings granted by
financial institutions outside Argentina. Under this requirement, the time frame to bring foreign currency into Argentina from certain export collections is reduced, posing a restriction on the term and amount of some of our sources of financing.



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On October 25, 2011, the Argentine government issued Decree
No. 1,722/11, providing that all foreign currency revenues obtained from exports made by mining and oil and gas companies must be repatriated and sold within the local foreign exchange market, which is the general regime applicable to export
revenues generated by Argentine exports. Prior to the issuance of Decree No. 1,722/11, companies engaged in exploration and development of hydrocarbons benefited from a special regime that allowed them to retain overseas up to 70% of the
proceeds of certain exports. Therefore, we now have the obligation to repatriate all of our exports proceeds.

Under Central Bank Communication A 5300, issued on April 26, 2012, export collections must be sold in
the Argentine foreign currency market within 15 days from receipt of such funds abroad.

These and other
measures issued from time to time by the Argentine government may curtail our ability to finance our operations through new loans granted by our controlling shareholder, its subsidiaries outside Argentina or any other kind of lender. See Item
3. Key InformationRisk FactorsFactors Relating to ArgentinaGovernment intervention in the Argentine economy could adversely affect our results of operations or financial condition, Item 3. Key InformationExchange
Rates and Item 3. Key InformationExchange Controls.

Cross-Default Provisions

Our notes and other bank financings outstanding as of December 31, 2013 included cross-default provisions whereby, in
the case of the notes, the trustee under the relevant notes may be instructed by the noteholders representing at least 25% of the related outstanding capital to declare, or in the cases of the bank financings, the relevant lender may declare, as the
case may be, all the amounts owed thereunder to be due and payable if any of our or our significant subsidiaries debt is accelerated or not paid when due, provided that those due and unpaid amounts exceed the higher of U.S.$25 million or 1% of
PESAs shareholders equity at the time such debt is due, and provided further that the default has not been eliminated or cured within the applicable legal and/or contractual terms, after we have been served notice of the default.

In addition, our Series S Notes contain cross-default provisions that are triggered if the maturity of
any indebtedness of Petrobras or of any of its material subsidiaries in a total aggregate principal amount of Ps. 100 million or more is accelerated. The Series S Notes also contain other customary event of default provisions relating to
Petrobras. See Description of Indebtedness and Liquidity and Capital ResourcesFinancing Activities.

As of the date of this Annual Report, we have complied with all covenants and other terms and conditions under our loan agreements, corporate bonds and other financial indebtedness.



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FUTURE CAPITAL REQUIREMENTS

PESAs shareholders meeting held on March 27, 2014: (a) approved (i) in accordance with legal
requirements, an increase of Ps. 714 million in the reserve for future investments, and the transfer to the legal reserve of Ps. 38 million based on our results in 2013, and (ii) a net decrease of Ps. 225 million in the reserve
for future investments (consisting of an increase in the amount of Ps. 2,299 million and a decrease in the amount of Ps. 2,524 million), and an increase of Ps. 225 million in the reserve for future dividends; and (b) delegated with
the Board of Directors the determination of the actual dividend distribution date and amount. As a result of the foregoing, as of the date of this Annual Report, the reserve for future dividends amounts to Ps. 1,275 million and the reserve for
future investments amounts to Ps. 5,432 million.

We estimate that our capital expenditure requirements, debt
payment obligations, dividends payments and working capital will be financed by cash from operations and, to a lesser extent, by new debt financings and possible divestments.

Our level of investments will depend on a variety of factors, many of which are beyond our control. These include the
future price evolution of the commodities we sell, the behavior of energy demand in Argentina and in regional markets, the existence and competitive impact of alternative projects, the enforcement of regulations and changes in applicable
regulations, taxes and royalties, and the political, economic and social situation prevailing in the countries where we operate.



| |  |  | Oil and Gas Exploration and Production
| | - |  | --------------------------------------

Our 2014 investment plan is consistent with reserves replacement and production goals, mainly in the Neuquén Basin
in Argentina, and is primarily aimed at ensuring PESAs sustainable growth.

Efforts will continue to
develop oil reserves through well drilling, delimitation of reserves, and expansion of secondary recovery projects and of relevant surface facilities.

Along these lines, and by using cutting-edge technology in the country, the Company will continue with exploration study and investment programs aimed at attaining new findings at conventional and
non-conventional oil and gas reservoirs. As of December 31, 2013, we maintained investment commitments for approximately U.S.$8 million, including exploratory wells perforation in the Río Colorado, Río Atuel, Borde del Limay y
Chirete blocks, all located in Argentina.



| |  |  | Refining and Distribution
| | - |  | -------------------------

In 2014, investments will focus on operational reliability improvements for refining facilities as a whole and maintenance of PESA gas stations network.



| |  |  | Petrochemicals
| | - |  | --------------

At the Puerto General San Martín plant, investments will continue focused on reliability and maintenance projects, pursuing increased yield and safety in operating processes.



| |  |  | Gas & Energy
| | - |  | ------------

In the Gas and Energy business segment, we will continue to seek to secure self-supply and, at the same time, develop profitable marketing alternatives



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OFF-BALANCE SHEET TRANSACTIONS

Other than as described below, we do not have any off-balance sheet arrangements required to be disclosed by Item 5
of Form 20-F.

OCP Investments Letters of Credit

In order to guarantee compliance with the Companys financial commitments under the Ship or Pay transportation
agreement executed with OCP and a portion of OCPs contractual obligations, we are required to procure letters of credit. These letters of credit are required to remain in effect until December 2018. As of December 31, 2013, we had
procured letters of credit for a total amount of about U.S.$74 million, mainly related to the Ship or Pay transportation agreement. As the letters of credit expire, we must renew or replace them. Otherwise, we would have to deposit cash in amounts
equal to our guarantee obligations, which would have a material adverse effect on our cash flows.

Other Guarantees

Our warranty bonds, sureties and guarantees as of December 31, 2013, 2012 and 2011, which are not disclosed
individually in the notes to our audited consolidated financial statements, amount to Ps. 120 million, Ps. 45 million and Ps. 18 million, respectively.

In certain business operations in which PESA and its counterparties act as customers and suppliers, both sides have
obtained guarantees (promissory bonds) in equivalent values, which as of December 31, 2013 amounted to Ps. 241 million.

CONTRACTUAL OBLIGATIONS

The following table summarizes certain contractual obligations as of December 31, 2013. The table does not include
accounts payable.

For further information on our contractual commitments, please see Note 30 to our Audited
Consolidated Financial Statements.



|                                            |  |                        |        |  |                 |  |       |           |  |  |           |  |  |                  |       |  |  |  |       | 
|------------------------------------------- |  | ---------------------- | ------ |  | --------------- |  | ----- | --------- |  |  | --------- |  |  | ---------------- | ----- |  |  |  | ----- | 
|                                            |  | Payments due by period |       
|                                            |  | Total                  |        |  | Less than1 year |  |       | 1-3 years |  |  | 3-5 years |  |  | More than5 years |      
|                                            |  | (in millions of pesos) |       
|Debt Obligations(1)                         |  |                        | 2,232  |  |                 |  | 208   |           |  |  | 81        |  |  |                  | 1,943 |  |  |  |      | 
|Purchase Obligations                        |  |                        |        |  |                 |  |       |           |  |  |           |  |  |                  |       |  |  |  |       | 
|Long-term service agreement(2)              |  |                        | 2,054  |  |                 |  | 1,216 |           |  |  | 604       |  |  |                  | 62    |  |  |  | 172   | 
|Petroleum services and materials(2)         |  |                        | 5,151  |  |                 |  | 4,120 |           |  |  | 977       |  |  |                  | 54    |  |  |  |      | 
|Transportation capacity(3)                  |  |                        | 1,541  |  |                 |  | 311   |           |  |  | 490       |  |  |                  | 254   |  |  |  | 486   | 
|Gas purchase agreements for Genelba         |  |                        | 193    |  |                 |  | 98    |           |  |  | 39        |  |  |                  | 40    |  |  |  | 16    | 
|Gasolines                                   |  |                        | 11,681 |  |                 |  | 1,846 |           |  |  | 1,734     |  |  |                  | 1,734 |  |  |  | 6,367 | 
|Crude oil transportation agreement with OCP |  |                        | 380    |  |                 |  | 92    |           |  |  | 164       |  |  |                  | 124   |  |  |  |      | 
|Pension Plan                                |  |                        | 336    |  |                 |  |      |           |  |  | 42        |  |  |                  | 47    |  |  |  | 247   | 
|                                            |  |                        |        |  |                 |  |       |           |  |  |           |  |  |                  |       |  |  |  |       | 
|Total                                       |  |                        | 23,568 |  |                 |  | 7,891 |           |  |  | 4,131     |  |  |                  | 4,258 |  |  |  | 7,288 | 
|                                            |  |                        |        |  |                 |  |       |           |  |  |           |  |  |                  |       |  |  |  |       | 
|Sales Obligations                           |  |                        |        |  |                 |  |       |           |  |  |           |  |  |                  |       |  |  |  |       | 
|Natural gas                                 |  |                        | 1,395  |  |                 |  | 475   |           |  |  | 619       |  |  |                  | 271   |  |  |  | 30    | 
|Electric power                              |  |                        | 5,433  |  |                 |  | 914   |           |  |  | 1,295     |  |  |                  | 1,265 |  |  |  | 1,959 | 
|LPG                                         |  |                        | 1,803  |  |                 |  | 226   |           |  |  | 452       |  |  |                  | 452   |  |  |  | 673   | 
|Gasolines                                   |  |                        | 7,226  |  |                 |  | 1,568 |           |  |  | 998       |  |  |                  | 998   |  |  |  | 3,662 | 
|                                            |  |                        |        |  |                 |  |       |           |  |  |           |  |  |                  |       |  |  |  |       | 
|Total                                       |  |                        | 15,857 |  |                 |  | 3,183 |           |  |  | 3,364     |  |  |                  | 2,986 |  |  |  | 6,324 | 
|                                            |  |                        |        |  |                 |  |       |           |  |  |           |  |  |                  |       |  |  |  |       | 



|(1) | Includes estimated interest payments accrued until December 31, 2013.
|--- | ---------------------------------------------------------------------

|(2) | Prices are generally determined by formulas based on future market prices. Estimated prices used to calculate the monetary equivalent of these
purchase obligations for purposes of the table are based on current market prices as of December 31, 2013 and may not reflect actual future prices. Accordingly, the peso amounts provided in this table with respect to these obligations are
provided for illustrative purpose only.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Estimated price of Ps. 0.32 million per million cubic meters.
|--- | -------------------------------------------------------------



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Debt Obligations. A description of our contractual obligations with
respect to our debt obligations is set forth under

Liquidity and Capital ResourcesDescription of
Indebtedness.

Long-Term Service Agreement. We have entered into a long-term service agreement
with different service providers in the ordinary course of our business. The aforementioned contracts provide for the supply of services such as maintenance and repair of Genelba, transportation between facilities and technical support.

Petroleum services and materials.We have entered into several agreements with different oil and gas petroleum
service providers in order to ensure the usual supply of services and materials in countries where we conduct oil and gas activities. The aforementioned contracts provide for the supply of services such as pulling services, work-over, perforation
works, materials and others.

Transportation capacity. We have entered into firm gas transportation
agreements with Metrogas and TGS to provide gas transportation services to our thermal power plant, Genelba. These contracts include firm commitments, which require us to meet our contractual obligations for the entire volume hired, even if no gas
is transported. These contracts expire in 2019.

Gas Purchase Agreement for Genelba. Complementing the
gas transportation agreements mentioned above, we have entered into natural gas supply agreements with TGS. Under these agreements, TGS has committed to supply Genelba Plus and Genelbas natural gas requirements in the event that such supply is
not met internally to ensure that both thermal power plants are able to meet their own contractual energy delivery commitments.

Crude Oil Transportation Agreement with OCP.We are party to an agreement with OCP related to oil transportation capacity of 80,000 barrels per day for a 15-year term starting November 10,
2003. This is a Ship or Pay transportation agreement. Therefore, the Company must comply with its contractual obligations for the aggregate committed capacity, regardless of the amount of crude oil actually transported, and pay, like the
other producers, a rate that covers OCP operating costs and financial services, among others. As of December 31, 2013, related current and non-current liabilities relating to the outstanding Ship or Pay contract amount to Ps. 92 million
and Ps. 288 million, respectively.

Pension Plans.A description of our contractual obligations
with respect to our pension plans appears in Note 24 to our Audited Consolidated Financial Statements.

Natural Gas Sales.These agreements correspond primarily to long-term sales commitments in order to ensure the
sale of natural gas in Argentina.

LPG and Electric Power Sales.These agreements correspond primarily
to sale commitments in order to ensure the sale of LPG and electric power in Argentina.

Gasolines.We
have entered into agreements with Oil Combustibles in order to ensure the supply of virgin naptha to our Refining and Distribution business segment. The aforementioned contracts provide for the acquisition by PESA, primarily, of virgin naptha for
our Refining and Distribution business segment and for the sale to Oil Combustibles of intermediate gasoline. These contracts extend to 2026.



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Item 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES

DIRECTORS AND SENIOR MANAGEMENT

Board of Directors

In accordance with the bylaws of PESA,
the Board of Directors is required to meet at least once every three months, and is composed of nine regular members who are elected for a three-year term. One-third of PESAs directors are elected each year. The shareholders meeting may
appoint a number of alternate members that may be equal to or lower than the number of regular members to fill any vacancy, in the order of their appointment.

The table below sets forth the current composition of the Board of Directors, as approved by PESAs general ordinary and special shareholders meeting held on March 27, 2014.



|                                   |  |                    |  |                    |  |            
|---------------------------------- |  | ------------------ |  | ------------------ |  | -----------
|Name                               |  | Year ofAppointment |  | Position           |  | TermExpires
|Luiz Gustavo Primo de Siqueira     |  | 2014               |  | Chairman           |  | 2015       
|Jorge José Nahas Neto              |  | 2013               |  | Vice Chairman      |  | 2014       
|José Raimundo Brandão Pereira      |  | 2009               |  | Director           |  | 2014       
|Antonio Eduardo Monteiro de Castro |  | 2012               |  | Director           |  | 2014       
|Cedric Bridger                     |  | 2004               |  | Director           |  | 2016       
|Roberto Luis Monti                 |  | 2003               |  | Director           |  | 2016       
|Carlos Ariel Lieutier              |  | 2014               |  | Director           |  | 2016       
|Ronaldo Batista Assunção           |  | 2013               |  | Director           |  | 2015       
|Luis Miguel Sas                    |  | 2003               |  | Director           |  | 2015       
|José Jorge De Moraes Júnior        |  | 2014               |  | Alternate Director |  | 2015       
|Gustavo Tardin Barbosa             |  | 2011               |  | Alternate Director |  | 2014       
|Eduardo Autran de Almeida Junior   |  | 2010               |  | Alternate Director |  | 2014       
|Luciana Bastos de Freitas Rachid   |  | 2012               |  | Alternate Director |  | 2014       
|Benicio Schettini Frazão           |  | 2013               |  | Alternate Director |  | 2015       
|Daniel Casal                       |  | 2003               |  | Alternate Director |  | 2015       
|Alejandro Poletto                  |  | 2008               |  | Alternate Director |  | 2016       
|David René Jacoby                  |  | 2013               |  | Alternate Director |  | 2016       



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As approved by PESAs general ordinary and special shareholders
meeting held on March 27, 2014, alternate directors will fill any vacancy in the following order: José Jorge De Moraes Júnior to Luiz Gustavo Primo de Siqueira, Gustavo Tardin Barbosa to Jorge José Nahas Neto, Eduardo
Autran de Almeida Junior to José Raimundo Brandão Pereira, Luciana Bastos de Freitas Rachid to Antonio Eduardo Monteiro de Castro, Benicio Schettini Frazão to Ronaldo Batista Assunção, Daniel Casal to Luis Miguel
Sas, Alejandro Poletto to Cedric Bridger or Roberto Luis Monti, and David René Jacoby to Carlos Ariel Lieutier.

For the purpose of CNV Resolution No. 622, Cedric Bridger, Roberto Luis Monti, Carlos Ariel Lieutier, Alejandro Poletto and David René Jacoby qualify as independent directors. CNV Resolution
No. 622 provides that a member of a corporate body shall not be considered independent if that member:



| | 1. | is also a member of management or an employee of shareholders who hold significant interests in the issuer, or of other entities in which these
shareholders hold either directly or indirectly significant interests or over which these shareholders exercise a significant influence,
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | is an employee of the issuer or has been an employee during the last three years,
| | -- | ---------------------------------------------------------------------------------



| | 3. | has professional relations or is part of a company or professional association that maintains professional relations with, or that receives
remunerations or fees (other than directors fees) from, the issuer or from its shareholders that hold either directly or indirectly significant interests in or exercise a significant influence over the issuer, or from which such shareholders
hold either directly or indirectly significant interests or exercise a significant influence,
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4. | is either directly or indirectly a holder of significant interests in the issuer or in an entity that has significant interests in or exercises a
significant influence over the issuer,
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5. | sells or provides either directly or indirectly goods or services to the issuer or to shareholders that hold either directly or indirectly
significant interests in or exercise a significant influence over the issuer and receives compensation for such services that is substantially higher than that received as a director, or
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 6. | is married or is a family member, up to fourth degree by blood or up to second degree by affinity, to an individual who would not qualify as
independent.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------

Significant interests mean shareholdings that represent at least
15% of the capital stock of the relevant entity, or a smaller percentage when the person has the right to elect one or more directors by class of shares or by having entered into agreements with other shareholders relating to the governance and the
management of the relevant entity or of its controlling shareholders.



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The following is a brief summary of the principal business and academic
experience of each of our directors:

Luiz Gustavo Primo de Siqueira (56) has served as an
alternate member of the Board of Directors since 2013. In 1980 he graduated in Mechanical Engineering from the Instituto Militar de Ingeniería (Engineering Military Institute), specializing in Oil Engineering in 1992, obtaining a
masters degree in Production Engineering from the Universidade Federal do Rio de Janeiro (UFRJ) in 1998 and an MBA in International Business Management. He worked in the Southwestern Drilling Section between 1983 and 1987, and then
worked as Chief of the Wells Coating Department of the Drilling Department until 1990. Between 1991 and 1995, he served as Quality Coordinator of the Drilling Department, and from 2000 to 2005 he was Quality and SMS Manager in Petrobras Colombia
Ltd. Then, from 2006 to 2011, he was the Organization, Management and Process Manager in the International Business Area. During 2012, he served as Corporate Director in Petrobras Colombia Ltd. He currently serves as International Executive Manager
for Latin America.

Jorge José Nahas Neto (54) has served as a member of and Vice Chairman
of the Board of Directors since 2013. He graduated in 1981 in Economy from the University Candido Mendes, specializing in Economy Engineering in 1993 from the same university. Since 1980, he has worked in different national and multinational
companies. He joined Petrobras in 1993, where he served in the financial and planning areas in Brazil and in the international area. He was the Finance Manager of Petrobras Internacional Braspetro B.V. and Finance and Administrative Manager of
Petrobras América Inc. in Houston, Texas. Since 2004, he has served as Financial and Risk Management Executive Manager, and since 2008 as Petros Deliberative Counselor.

José Raimundo Brandão Pereira (57) has served as a member of the Board of Directors since 2009.
He graduated in 1979 in Civil Engineering from the Universidad Estadual do Maranhão (UEMA). He joined Petrobras in 1980, where he specialized in Oil Engineering. During his career at Petrobras, he has held different administrative and
managing positions, including service as the Executive Manager for Marketing and Commercialization for the Supplying Direction and Petrobras International Finance Company Director, both of which he has held since June 2008. In September 2008, he was
designated Director of PIB BV. He worked in several areas within Petrobras (exploration and exploitation, international and downstream) and was resident in Bolivia (1999-2001) and Colombia (2001-2005). Has served as General Manager of maritime
transport at the Head Office in Brazil (2005-2008). He has attended courses on technical and managing training in Brazil and abroad, including a specialization training course in Managing Competencies at Fundación Dom Cabral (Brazil), a
course on Strategic Negotiation and Competitive Decision at Harvard Business School (USA) and courses on Oil Well Perforation at the Universidad Petrobras and Universidad Federal de Ouro Petro (Brazil).

Antonio Eduardo Monteiro de Castro (48)has served as a member of the Board of Directors since 2012. He
graduated in Mechanical Engineering from the UFRJ, and holds a masters degree in Politics and Management, from Ecole du Petrole et des Moteurs (France). In 1987, he started his career in Petrobrass energy division, in the Refining Area,
where he worked more than ten years in the assessment and development of energy generation and cogeneration projects. Since 2000, he has worked in the Gas and Energy Area, where he was General Manager, responsible for the development of new
businesses and gas projects (gas pipelines and LPG) and Energy (thermoelectric power stations together with national and international companies). In 2006, he started leading corporate management and planning activities as Executive Manager. One
year later, he presided over the Transportadora Brasileña Gasoducto Bolivia-Brasil (TBG) Administrative Council. In 2008, he was designated the head of Petrobrass Gas and Energy Marketing and Commercialization area. From
2009 to 2010 he served as a member of the Board of Directors. He is currently the Executive Manager of Corporate Strategy.

Cedric Bridger (78) has served as a member of the Board of Directors since 2004, and is currently a member of the Audit Committee. He graduated in Public Accounting in London from the
Association of Certified and Corporate Accountants, where he initiated his professional activities. He joined FADIP S.A. (later Hughes Tool Co. S.A.) in Buenos Aires in 1964, where he was Financial Manager. Subsequently, he became General Manager of
the company in Brazil and was ultimately appointed its Vice President of Operations for Latin America. From 1992 to 1998, he was Chief Financial Officer of YPF S.A. In April 1998, he retired from YPF S.A. and took a position as Director of Banco
Hipotecario S.A. and since 2003 he has been a member of the board of directors of IRSA Inversiones y Representaciones S.A.

Roberto Luis Monti (75) has served as a member of the Board of Directors since 2003, and is currently a member of the Audit Committee and of the Compensation Committee. He graduated in
Electromechanical Engineering. He received a Master of Electronic Engineering from the Universidad de Buenos Aires (UBA), and an MBA from the American Management Association, New York. For 32 years he worked for Schlumberger, where he



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was Vice-Chairman of Wireline Operations, Chairman of Anadrill, Chairman of Wireline & Testing for Europe, Africa, Middle and Far East and Latin America, and Chairman of Dowell at a
worldwide level during the period from 1981 to 1995. From 1995 to 1997 he served as Chairman and CEO of Maxus Energy Corporation. From 1997 to 1999 he served as Chairman and CEO of YPF S.A. In 2000, he served as Vice Chairman of Exploration and
Production and Vice Chairman of the board of directors of YPF S.A. In addition, he currently serves as member of the board of directors of Tenaris S.A.

Carlos Ariel Lieutier (36) has served as a member of the Board of Directors since 2014. He graduated in Economy in 2002 at the UBA. In 2005 he obtained a Postgraduate degree in Public
Management for Social Development from the Alcalá de Henares University and the Spanish Public Administration Institute. He is currently enrolled in a Masters Degree in Political Economy at the Facultad Latinoamericana de Ciencias Sociales.
Since 2001, he has held several positions within the City of Buenos Aires and National Governments, serving as Financial Manager of the Pensioners National Social Services Institute and General Manager of the Health Superintendence. Since 2013, he
serves as General Institutional Coordinator of the Polical Economy Secretary within the National Ministry of Economy.

Ronaldo Batista Assunção (58) has served as a member of the Board of Directors and as Chief Executive Officer since 2013. He is also member of the Compensation Committee. He
graduated in Civil Engineering from the Brasilia University in 1978, specializing in Oil Engineering and obtained a Posgraduate degree in Economic Engineering and Industrial Administration from the UFRJ. He held different managing positions within
Petrobras, including: General Executive Manager of Operations and Participations in Energy and Chairman of Brasil PCH S.A. and Breitener Energética S.A. In addition, he is currently Chairman of Petrobras Energía Internacional S.A. and
member of the board of directors of Petrobras Energía Ecuador Ltd., Petrobras Energía Colombia Ltd., Petrolera Entre Lomas S.A, Petrobras Hispano Argentina S.A., Petrobras Energía de México S.A. de C.V., Atalaya Energy
S.A. and Canadian Hunter S.A.

Luis Miguel Sas (51) has served as a member of the Board of
Directors since 2003, and as Chief Financial Officer since May 2004. He graduated in Public Accounting from the UBA and holds an MBA from the Instituto de Altos Estudios EmpresarialesUniversidad Austral. He joined PESA in 1984. In 1990 he was
appointed Head of the Financial Operations Department for Telecom. He worked as head of Petrobras Argentinas money desk and in 1997 he was appointed Corporate Finance Manager, in charge of capital markets and project financing. In January
2000, he was appointed Chief Financial Officer of EDESUR. He served as Financial Manager at PESA between May 2001 and May 2004. In addition, he currently serves as Chairman of Petrobras Hispano Argentina S.A. and is member of the board of directors
of PELSA and Petrobras Energía Internacional S.A. He is also a member of the Executive Boards of the Foundation for Latin American Economic Research (FIEL) and the Argentine Institute of Financial Executives (IAEF).

The following is a brief summary of the principal business and academic experience of each of our alternate directors:

José Jorge de Moraes Júnior.(58) has served as an alternate member of the Board of
Directors since 2014. He graduated in Geology from São Paulo University in 1979 and obtained a Masters Degree in Sedimentology and Stratigraphy from Ouro Petro University in 1988. He joined Petrobras in 1980 where he has held several managing
positions such as Petrobras Colombia Exploration Manager, Exploration Activity Manager at Campos Basin, New Business General Manager Corporate E&P Executive Manager. He currently serves as International Corporate Executive Manager.

Gustavo Tardin Barbosa (53) has served as an alternate member of the Board of Directors since 2011. He
graduated in Civil Engineering from Pontificia Universidade Católica do Rio de Janeiro in 1985. He also holds an MBA from Fundação Getulio Vargas (1992), post graduate studies in Corporate Finance from London Business School
(1996) and Advanced Management from Wharton School (2002). He joined Petrobras in 1986 where he has held several senior financial positions including Controller of Petrobras International (1993-1994), Chief Financial Officer of Petrobras UK
(1994-1999), Executive Manager of Financial Planning and Risk Management of Petrobras (1999-2003) and Chief Financial Officer of Petrobras America (2003-2011). In 2011, he was appointed by Petrobras to serve as Executive Manager of Corporate
Finance.

Eduardo Autran de Almeida Junior (51) has served as an alternate member of the Board of
Directors since 2011. He graduated in 1985 in Electrical Engineering in the Pontifical Catholic University of Río de Janeiro. He joined Petrobras as the Supplies Manager. In 1990, he did a course in Systems Analysis in Petrobras and a master
in



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Computing Sciences in the same Pontifical Catholic University of Río de Janeiro. In addition, in 2000, he concluded his Master in Business Administration in COPPEAD. In Petrobras, he held
important positions in his career, out of which we can remark the period between 1999 and 2006, where he served as Supplies Manager based in Singapore. Since 2006, he served as Supplies General Manager until 2010, when he was appointed Supplies
Executive Manager, position which he holds currently.

Luciana Bastos de Freitas Rachid (56)has
served as an alternate member of the Board of Directors since 2012. She graduated in Chemical Engineering from the UFRJ, specializing in Oil, Modeling, Simulation and Process Control. She also has a degree in Corporate Finance from Getúlio
Vargas Foundation and a Management extension course from the INSEAD. She joined Petrobras in 1979 and has developed a great number of technical and managerial functions, especially in the Exploration and Production segment. At the financial area,
she was Financial and Risk Management Executive Manager and Investors Relations Executive Manager. She is currently the Logistic and Participation in Natural Gas Executive Manager at the Gas and Energy segment, and a member in the board of directors
of Transportadora Brasileira Gasoducto Bolivia-Brasil S.A., Transportadora Asociada de Gas and Gas Brasiliano Distribuidora S.A.

Benicio Schettini Frazao (58) has served as Director of Oil and Gas Exploration and Production since November 2011. He graduated in Civil Enginering and in 1979 joined Petrobras, where he
specialized in Oil Engineering. Since 1980, and for over 20 years, he worked at the Campos Basin. First, his duties were at an off-shore platform, and then at the Operations Management and the Supply Area. He also served at the E&P Service
Material Division at Petrobras, at Rio de Janeiro. Subsequently, Mr. Schettini Frazao took on responsibility within the E&P area, for the installation, engineering, construction, training, and initiation of production of the P50 Platform
for over seven years. From 2008 through November 2011, he was General Manager of E&Ps New Business in Petrobras. He is currently a member of the board of PELSA and of Petrobras Bolivia Internacional S.A.

Daniel Casal (57) has served as an alternate member of the Board of Directors and as Executive Director of
Legal Affairs of PESA since 2003. He graduated in Law from the Universidad Católica Argentina in 1980. He joined PESA in 1991. He also serves as member of the boards of directors of TGS, Compañía de Inversiones de Energía
S.A., Petrobras Energía Colombia Ltd., Petrobras Energía Internacional S.A. and PELSA.

Alejandro Poletto (41)has served as an alternate member of the Board of Directors since 2008. He graduated
in Law from the Universidad Católica Argentina in 1998 and received a Master Degree in Law (LL.M.) from Cornell University Law School, Ithaca, New York. He has previous experience as an associate lawyer for the law firms Marval,
OFarrell & Mairal, and Cárdenas, Cassagne & Asociados in Buenos Aires. He also worked as a foreign associate at Skadden, Arps, Slate, Meagher & Flom LLPs New York Office. He is a partner at Beccar Varela
Law Firm.

David René Jacoby (31)has served as an alternate member of the Board of
Directors since 2013. He graduated in Economy from the Universidad de Buenos Aires in 2006, specializing in Public Financial Administration in 2007, and obtaining a masters degree in Political Economy in 2010. Since 2005, he has held several
positions within the Argentine Ministries of Economy, Industry and Health. Since 2012, he has been an Advisor in the Gas and Oil Section of the National Direction of Companies Participated in by the Argentine Government (Dirección Nacional
de Empresas con Participación del Estado) within the Ministry of Economy.

Administration and Organization

PESAs operations are divided into four business segments that are in turn supported by corporate functions. The four
business segments are: Oil and Gas Exploration and Production; Refining and Distribution; Petrochemicals and Gas and Energy.

PESA is managed by a committee made up of five members: the Chief Executive Officer, the Chief Financial Officer, the Director of Oil and Gas Exploration and Production, the Downstream Director and the
Corporate and Services Director. Operations are managed through standardized processes that facilitate and secure coordination between the different units and groups. Delegation of authority is encouraged for the purpose of promoting efficiency. In
addition, the scope of the delegation of authority is clearly and expressly determined through systemized approval limits for risk minimization purposes. Our internal control system is supported by coordination among the areas responsible for
managing businesses and administering them on a centralized basis, always within the framework of the policies established by the executive committee. Operating and administrative processes are jointly supported by administrative procedures, highly
reliable information systems, production of periodic management control reports, performance appraisals and fluid communication.



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Executive Officers

The table below sets out the names and positions of PESAs executive officers:



|                          |  |                                                           
|------------------------- |  | ----------------------------------------------------------
|Name                      |  | Position                                                  
|Ronaldo Bastista Assunção |  | Chief Executive Officer                                   
|Luis Miguel Sas           |  | Chief Financial Officer                                   
|Benicio Schettini Frazao  |  | Director of Oil and Gas Exploration and Production Segment
|Adelson Antonio da Silva  |  | Corporative and Services Director                         
|Luiz Alberto Domingues    |  | Downstream Director                                       
|Daniel Casal              |  | Executive Manager of Legal Affairs                        
|Allan Leslie Blumenthal   |  | Executive Manager of Gas and Energy Segment               
|Alfredo Guía y Díaz       |  | Executive Manager of Strategy, Planning and Performance   

The following is a brief summary of the principal business and academic experience of
PESAs executive directors and executive officers of the Company (for the summary regarding those who are directors, see above).

Luiz Alberto Gaspar Domingues (62)served as member of our board of directors in 2013 and since 2012, he serves as Downstream Director of PESA. He graduated in Electrical Engineering at the
University of Rio de Janeiro in 1976. He joined Petrobras 35 years ago and has held several positions, such as Refining Ventures General Manager and Supply Executive Manager. Mr. Domingues was also member of the board of directors of
Refinerías Abreu e Lima S.A. and Alberto Pasqualini S.A. and currently serves as chairman of board of directors of Refinería del Norte S.A. and of Eg3 Red S.A.

Adelson Antonio da Silva (57)served as Executive Manager of Human Resources from 2010 to 2013, when he was
appointed as Corporate and Services Director. He graduated as a Certified Public Accountant from Nilton Paiva Ferreira University, in Belo Horizonte, and as a Lawyer from Candido Mendes University, in Río de Janeiro. He obtained a
specialization degree in tax law from Sá University and holds an Executive/Marketing MBA degree from COPPEAD-UFRJ in Rio de Janeiro. He joined Petrobras over 30 years ago and held several positions, mainly in the Human Resources, Accounting,
Finance, Commercial and Business Development areas. He served as Executive Manager of Planning and Management Control at PESA and as Director of some companies related to the Company during 2003, 2004 and 2005. He served as General Manager of
Strategy, Planning, Portfolio Management and Project Management in the Internacional Area.

Alfredo Sergio
Guía y Díaz (57) has served as Executive Manager of Strategy, Planning and Performance since 2008. He graduated in Economic Sciences with a specialization in Business Administration at Universidad Nacional de La Plata. He
joined PESA in 1997, when he took responsibility for the Planning and Management Control Department of the Refining and Petrochemicals business segment and the Management Control Department of Oil and Gas Exploration and Production and Gas and
Energy segments. He has also has served as Performance Appraisal Manager for the Southern Cone region within Petrobras International Area from 2005 through 2007. He is also currently a member of the board of directors of Petrolera Entre Lomas
S.A. and of Petrobras Energía Internacional S.A.

Leslie Allan Blumenthal (45)has served
as Executive Manager of Gas and Energy since 2013. He graduated in Business Administration at the Universidad de Belgrano in 1997 and attended a Postgraduate course in Oil and Gas at the Instituto Teconológico Buenos Aires in 2001.
Mr. Blumenthal joined PESA in 1993, where he has held several managing positions such as Logistic Manager, Sales of Oil and Gas Manager, Relations with the Government and Partners in E&P Manager and Commercialization of Natural Gas Manager.
He is also the current chairman of the board of directors of World Energy Business S.A. and of Enecor S.A and alternate director of the board of directors of TGS and of CIESA.



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COMPENSATION

Compensation of the members of the Board of Directors is determined at the Ordinary Shareholders Meeting in
compliance with the Argentine Companies Law. The maximum amount of compensation that the members of the Board of Directors may receive, including salaries and any other form of compensation for the performance of technical, administrative, or
permanent functions, may not exceed 25% of our profits. Such amount is 5% in the event that no dividends are distributed to the shareholders and is increased pro rata on the basis of the dividend distribution, up to the 25% cap. In the event
that one or more directors serve as members of a special committee or perform technical or administrative functions, and profits are reduced or non-existent, and, consequently, the preset limits are exceeded, compensation in excess of the limit may
only be paid with the prior express approval by shareholders at an ordinary shareholders meeting.

In
PESA, the compensation policy for executive officers includes annual cash compensation and a benefits program. The annual cash compensation is determined based on the characteristics and responsibilities of the relevant position and the executive
officers qualifications and experience and benchmark information. Such compensation consists of a monthly fixed compensation and annual variable cash bonus dependent upon PESAs results of operations and the achievement of individual
goals and objectives. Benefits granted to executive officers are similar to those granted to employees generally, such as life insurance, health care plan, meal allowance and defined benefits pension plan, which are described in the audited
consolidated Financial Statements.

No contracts for services were entered into between the directors and the
Company or any of our subsidiaries that provide for benefits after termination of their office, other than as provided by law.

In 2013, PESA paid an aggregate of approximately Ps. 18 million to its directors and executive officers. The members of the Board of Directors and our executives do not receive compensation in the
form of stock or equity. For information related to amounts set aside for pension and retirement benefits, see Note 24 to our Audited Consolidated Financial Statements.



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BOARD PRACTICES

Audit Committee

Pursuant to the Regime concerning transparency in public offerings approved by Capital Market Law No. 26,831, Argentine public companies must have an audit committee composed of three or more members
of the board of directors.

On May 21, 2003, the Board of Directors approved the implementation process
required under CNV General Resolution No. 400/02 for audit committees. In compliance with these resolutions, at the shareholders ordinary meeting held on March 19, 2004, PESA amended its bylaws by adding a provision related to the
structure and operation of the Audit Committee.

On May 7, 2004, the Board of Directors created the Audit
Committee and, in compliance with its duties, the Audit Committee approved its charter. At the Board of Directors meeting held on March 27, 2014, Cedric Bridger, Roberto Luis Monti and Carlos Ariel Lieutier were appointed as regular members of
our Audit Committee and Alejandro Poletto and David René Jacoby were appointed as alternate members. Each of the members of the Audit Committee satisfies the independence requirements of Rule 10A-3 of the Exchange Act.

Audit Committee Terms of Reference

The purpose of the Audit Committee is to assist the Board of Directors in fulfilling its responsibilities relating to (1) the companys financial statements, (2) compliance with applicable
legal, regulatory and behavioral requirements, (3) qualification and independence of the independent external auditor that delivers an audit report on the companys financial statements (the Independent Auditor), and
(4) the conduct of the internal audit and the Independent Auditors performance.

The Audit
Committee is composed of three regular members and an equal or lower number of alternate members that are appointed by the Board of Directors from among its members. Directors having sufficient experience and ability in financial, accounting or
business matters are eligible to become members of their Audit Committee. All members of the Audit Committee must be independent in accordance with applicable SEC standards and a majority must be independent in accordance with the standards of the
CNV. See Directors and Senior ManagementBoard of Directors. The audit committees may adopt its own internal regulations.



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Once every year our Audit Committee prepares a working plan with respect to
its goals and work schedule for the fiscal year to be reported to the Board of Directors. The remaining directors, members of the Statutory Supervisory Committee, managers and external auditors may, at the Audit Committees request, attend the
Audit Committees meetings, assist the Audit Committee and provide it with any information available to them. For a better performance of its duties, the Audit Committee may retain, on the Companys account, advisory services of counsel
and other independent professionals. The Audit Committee shall have access to the information and documentation deemed necessary for the fulfillment of its functions.

Our Audit Committee has the following principal powers and responsibilities:



| | 1. | To supervise the performance of the internal control systems, the performance and reliability of the administrative and accounting system, the
reliability of the financial statements and all the financial information and the disclosure of relevant events.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | To establish and supervise the implementation of procedures for the reception, documentation and treatment of claims or reports on irregularities in
connection with accounting, internal control or auditing matters, on a confidential and anonymous basis.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 3. | To issue founded opinions with respect to transactions with related parties as required by applicable law. To issue founded opinions whenever a
conflict of interest exists or may arise for us and to communicate this opinion to self-regulated entities as required by the CNV.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4. | To provide the market with complete information with respect to transactions where members of the corporate bodies and / or controlling shareholders
of ours have conflicts of interests.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5. | To opine with respect to the reasonableness of the compensation and stock option plans proposed by the Board of Director at the shareholders
meetings.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------



| | 6. | To opine with respect to the compliance of legal requirements and on the reasonableness of proposals to issue shares or securities convertible into
shares, in the case of capital increases that exclude or limit preemptive rights.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 7. | To issue at least once, at the time of submittal of the annual financial statements, a report on the treatment given during the year to the matters
under its responsibility.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 8. | To issue an opinion on the proposal submitted by the Board of Directors for the appointment (or revocation) of the independent auditor and
communicate it to the shareholders meeting.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9. | To evaluate the qualifications and independence of the independent auditors.
| | -- | ----------------------------------------------------------------------------



| | 10. | To issue and maintain pre-approval procedures in connection with any service (whether audit-related or not) to be provided by the independent
auditor, under which the Committee will be exclusively authorized to pre-approve any service provided by the said Auditor.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 11. | To evaluate the quality of our accounting standards and the main changes to such accounting standards.
| | --- | ------------------------------------------------------------------------------------------------------



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Compensation Committee

In order to better supervise salary and compensation matters, the Board of Directors created a compensation committee at
its October 6, 2006 meeting. The main purpose of this committee is to assure the compliance with, and revise whenever necessary, policies relating to compensation that aim to provide the company with greater flexibility to make more effective
decisions. The compensation committee meets monthly to approve matters relating to compensation policy, including compensation subject to our and the employees performance. The compensation committee, composed of Directors Roberto Luis Monti,
Luiz Gustavo Primo de Siqueira and Ronaldo Batista Assunção, must report to the Board of Directors at least semiannually.

Statutory Supervisory Committee

PESA has a Sindicatura(the Statutory Supervisory Committee) that is comprised of three members and three alternate members.

The table below sets out the name, year of appointment and position of each person on the PESA Statutory Supervisory
Committee, approved by the ordinary and special shareholders meeting held on March 27, 2014:



|                            |  |                          |      |  |          |           |             |  |      | 
|--------------------------- |  | ------------------------ | ---- |  | -------- | --------- | ----------- |  | ---- | 
|Name                        |  | First year ofappointment |      |  | Position |           | TermExpires | 
|Juan Carlos Cincotta        |  |                          | 2004 |  |          | Member    |             |  | 2014 | 
|Justo Federico Norman       |  |                          | 2003 |  |          | Member    |             |  | 2014 | 
|Rogelio Norberto Maciel     |  |                          | 2003 |  |          | Member    |             |  | 2014 | 
|Olga M. Morrone de Quintana |  |                          | 2004 |  |          | Alternate |             |  | 2014 | 
|Mariana P. Ardizzone        |  |                          | 2004 |  |          | Alternate |             |  | 2014 | 
|María Laura Maciel          |  |                          | 2004 |  |          | Alternate |             |  | 2014 | 

The members and alternate members of the Statutory Supervisory Committee are elected by
the shareholders at the annual shareholders meeting to serve for a renewable term of one year. The primary responsibilities of the Statutory Supervisory Committee are to monitor the board of directors and managements compliance
with the Argentine Companies Law, our bylaws and shareholders resolutions. The Statutory Supervisory Committee also performs other functions, including: (1) attending meetings of the Board of Directors and shareholders, (2) calling
special shareholders meetings when deemed necessary or when required by shareholders, in accordance with the Argentine Companies Law, (3) presenting a report on the reports of the Board of Directors and the annual financial statements at
ordinary shareholders meetings, and (4) investigating written complaints of shareholders representing not less than 2% of the capital stock. The Statutory Supervisory Committee may not engage in any management control and, accordingly,
may not evaluate business judgment and decisions on issues of administration, financing, sales and production, as these issues fall within the exclusive responsibility of the Board of Directors.

Justo Federico Norman, Rogelio Norberto Maciel, Mariana P. Ardizzone and María Laura Maciel are lawyers and work
at Maciel, Norman & Asociados Law Firm, which has professional relations with and charges fees to us, our controlling companies and our associates.

Olga M. Morrone de Quintana is a public accountant and works at Estudio Morrone de Quintana, Seoane & Quintana, which has professional relations with and charges fees to us and certain of our
associates.



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The following is a brief summary of the principal business and academic
experience of the members of the Statutory Supervisory Committee listed in the table above:

Juan Carlos
Cincotta (69) graduated in public accounting from UBA. He is currently head of Cincotta Asesores, Auditores y Consultores, and formerly a partner at Pistrelli, Henry Martin y Asociados (Ernst & Young). He specializes in external
audits of major public and private entities, and consulting in accounting, social and corporate governance issues. He was a member of the Special Commission on Accounting and Auditing Regulations (CENCyA) of the Argentine Federation of Professional
Councils in Economic Science and of the Nominating Committee of the International Federation of Accountants (IFAC). He lectures on topics within his special field of work in specialized entities in Argentina and abroad. He published
several works on accounting, corporate and audit matters in different technical magazines and co-authored of the Treaty of Auditors Responsibility, Thomson Reuters-La ley Editorial, Buenos Aires, 2014.

Justo Federico Norman (69) earned his law degree from the Universidad Cátolica Argentina, and is a
partner of Maciel, Norman & Asociados Law Firm in Buenos Aires. He has extensive experience in the general practice of law and in the fields of energy, natural resources, oil and gas regulations and environmental issues, and is renowned in
the litigation and international arbitration fields. He is a member of the Association of International Petroleum Negotiators where he has served as Regional Secretary (2001-2004), the International Bar Association, and Rocky Mountain Mineral Law
Foundation. He has represented and currently represents companies such as Anadarko Petroleum Corporation, ANR Pipeline Company (Coastal), Apache Corporation, BHP Petroleum (Americas) Inc., British Gas, Devon Energy Corporation, Parker Drilling, and
Petroliam National Berhad (Petronas). He is a Regular Director of Petronas Argentina S.A. and Apache Petrolera Argentina S.A., among others.

Rogelio Norberto Maciel (77) earned his law degree from the Universidad de Córdoba, and is a founding partner of Maciel, Norman & Asociados Law Firm. He is a renowned lawyer in
the litigation and international arbitration fields. He was one of the members of the Argentine Aeronautical Code Drafting Committee and was a member of the Argentine delegation to the International Civil Aviation Association. He is a member of the
Buenos Aires Oil Club, the international Bar Association (IBA), the Association of International Petroleum Negotiators, and the Rocky Mountain Mineral Law Foundation. He is Vice Chairman of Petronas Argentina S.A., a Regular Director of BHP
Petroleum (Argentina) S.A. and an Alternate Director of Petrolera Rio Alto S.A., among others.

Olga M.
Morrone de Quintana (78) is a partner of Morrone de Quintana, Seoane & Quintana. She graduated in public accounting from UBA in 1965. She is currently a member of the statutory supervisory committee of PELSA, Petrobras
Energía Internacional S.A., World Energy Business S.A. and Propyme SGR. She is also President of the Commission for the Study of the Difficulties of Disabled Professionals of the Professional Counsel of Economical Sciences and Treasurer of an
accountants professional organization.

Mariana P. Ardizzone (42) earned her law degree from
the UBA. She holds a Master of Laws degree from the University of Michigan a post-graduate degree in Business Administration and Electric Energy and Natural Gas Markets at the Instituto Tecnológico de Buenos Aires. She is a member of the
Association of International Petroleum Negotiators and the Rocky Mountain Mineral Law Foundation. Since July 2001, she has been an associate with Maciel, Norman & Asociados in Buenos Aires.

María Laura Maciel (51) earned her law degree from the Universidad Católica Argentina. She is
currently an associate with Maciel, Norman & Asociados in Buenos Aires, specializing in the general aviation law, and aircraft leasing and financing contracts, air transport, regulatory issues, air freight, and cargo matters in particular.
She completed postgraduate courses in private international law and in aviation law at American University in Washington D.C. (1986), and postgraduate courses with the International Association of Air Transportation, Montreal, Canada (2004-2005).

Total compensation for the members of the Statutory Supervisory Committee of PESA in 2013 was Ps. 0.78
million.



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EMPLOYEES

The following table sets forth the number of PESA employees by business segment for the fiscal years ended
December 31, 2013, 2012 and 2011.



|                                       |  |                    |       |  |      |  |       |      |  |  |       | 
|-------------------------------------- |  | ------------------ | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                                       |  | As of December 31, |      
|                                       |  | 2013               |       |  | 2012 |  |       | 2011 | 
|Oil and Gas Exploration and Production |  |                    | 492   |  |      |  | 499   |      |  |  | 499   | 
|Refining and Distribution              |  |                    | 1,217 |  |      |  | 1,320 |      |  |  | 1,287 | 
|Petrochemicals                         |  |                    | 642   |  |      |  | 635   |      |  |  | 637   | 
|Gas and Energy                         |  |                    | 21    |  |      |  | 23    |      |  |  | 22    | 
|Corporate                              |  |                    | 555   |  |      |  | 671   |      |  |  | 670   | 
|                                       |  |                    |       |  |      |  |       |      |  |  |       | 
|Total                                  |  |                    | 2,927 |  |      |  | 3,148 |      |  |  | 3,115 | 
|                                       |  |                    |       |  |      |  |       |      |  |  |       | 

As of December 31, 2013, approximately 52% of our workforce consisted of members of
labor unions that had entered into collective bargaining agreements with the Company and our subsidiaries. We have historically maintained good relations with our employees and labor unions. Except for trade union conflicts at Zárate Plant
between March and June 2013, there were no significant labor strikes en 2013. During 2011, 2012 and 2013, we conducted different negotiations with unionized employees engaged in upstream and downstream operations in Argentina. See Item 3. Key
InformationRisk FactorsFactors relating to our BusinessWe could be subject to organized labor action.

Argentine labor law currently obligates private sector businesses to maintain certain wage levels and provide certain benefits to their employees. We cannot assure you that the Argentine government will
not in the future adopt measures requiring employers to offer increased wages or benefits, or that the employees of contractors we employ and/or unions to which they belong will not directly solicit such increases from us.

PESA maintains an employee defined contribution plan and two defined benefit pension plans. See Note 24 to our audited
consolidated financial statements.

SHARE OWNERSHIP

To our knowledge, none of our directors or members of our senior management owns more than 1% of PESAs outstanding
shares.



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Item 7. MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS

MAJOR SHAREHOLDERS

Our share capital consists of 2,019,236,820 Class B shares, which have a nominal value of Ps. 1.00, and are each entitled
to one vote per share.

Petrobras, through its subsidiary PPSL, holds 67.2% of the outstanding shares of PESA.

The table below sets forth certain information as of March 31, 2014 with respect to the ownership of
PESAs capital stock by each shareholder who is known to us to be the owner of more than 5% of such shares.



|            |  |                                     |               |  |                                  |  |      |     
|----------- |  | ----------------------------------- | ------------- |  | -------------------------------- |  | ---- | ----
|            |  | Class B Shares as of March 31, 2014 |              
|Shareholder |  | Number of Shares                    |               |  | % of the TotalOutstanding Shares | 
|PPSL        |  |                                     | 1,356,791,556 |  |                                  |  | 67.2 | %   
|ANSES       |  |                                     | 239,277,004   |  |                                  |  | 11.8 | %(1)



| | (1) | Corresponds to holdings identified in information provided by Caja de Valores as of March 31, 2014. With respect to possible holdings in the
form of ADSs on the NYSE, such information is not available.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

On November 20, 2008, the
Argentine Congress enacted Law No. 26,425, unifying the Argentine pension and retirement system into a system publicly administered by the ANSES and eliminating the retirement savings system previously administered by private pension funds
under the supervision of a governmental agency. In accordance with the new law, private pension funds transferred all of the assets administered by them under the retirement savings system to the ANSES. As October 31, 2008, these funds held 13%
of the outstanding shares of one of our predecessor companies, PEPSA. In addition, the ANSES was subject to the same investment rules, prohibitions and restrictions that were applicable to the Argentine private pension funds under the retirement
savings system, including Sections 75 and 76 of Law No. 24,241, which limited the voting rights of private pension funds in shareholders meetings to 5% of the relevant companys shares. On April 13, 2011, paragraph f)
Section 76 of Law No. 24,421 was repealed by Decree No. 441/11, which provides that the ANSES may exercise fully its voting rights in the companies in which it has an interest without the 5% limitation described above. Under such
decree, the ANSES may be able to appoint representatives to the boards of directors of companies according to the ANSES holding of shares. Pursuant to Decree No. 1,278/12, issued by the Executive Branch on July 25, 2012, these
representatives are to report directly to the Ministry of Economy and are subject to a mandatory information-sharing regime, under which, among other obligations, they must immediately inform the Ministry of Economy of the agenda for each board of
directors meeting and provide related documentation.

As of April 8, 2014, there were 17 registered
holders of our ADSs in the United States and 26,661,929 of our ADSs were outstanding. Since certain of our ADSs are held by brokers or other nominees, the number of direct record holders in the United States may not be fully indicative of the number
of direct beneficial owners in the United States of our ADSs, or of where the direct beneficial owners of such ADSs are resident. We have no information concerning holders with registered addresses in the United States that hold our shares which are
not represented by ADSs.

RELATED PARTY TRANSACTIONS

General conditions:

Related party transactions are carried out in the ordinary course of our operations at market conditions. We believe that the terms of these transactions are comparable to those offered by or that could
be obtained from non-related third parties.

Acquisition of companies:

On May 31, 2012, we agreed to acquire an additional 39.671% equity interest in PELSA from our shared controlling
company PPSL for an amount of U.S.$249.4 million. As from such date, we have exercised control over PELSA with a total shareholding of 58.881%.



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The price agreed between the parties further includes a contingent
obligation in favor of the seller for a period of ten years from the acquisition to reflect the value of any identification of non-conventional resources in the commercially exploitable areas of Entre Lomas,
Bajada del Palo, Agua Amarga and Charco del Palenque. The amount of such compensation would be determined considering the market value of these resources to the valuation date, and the related valuation study would be conducted by an internationally
recognized independent evaluator hired by agreement between the parties. At the date of issuance of this Annual Report, non-conventional commercially exploitable resources have not been identified, for which reason the Company has not recognized
liabilities related to this part of the transaction. See Note 13.5 to our Audited Consolidated Financial Statements and Exhibit 5.0 to this Annual Report.

Sales of companies:

On March 31, 2011, through our
subsidiary Petrobras Energía Internacional S.A., we agreed to sell our indirect interest in Innova to Petrobras for a total price of U.S.$332 million, which sale implied the discontinuation of our operations in Brazil and resulted in a gain
of Ps. 723 million before considering the effects of income taxes and the reclassification of deferred results of Ps. 134 million for IFRS purposes. In April 2011, we received U.S.$228 million of the sale price, and the remaining U.S.$104
million are due on September 30, 2013, or any earlier date upon mutual agreement of the parties. The outstanding balance bears interest at LIBOR (12 months) until the date of its payment.

In December 2007 and in April 2009, we sold 40% of our equity interest, and then the remaining 60% of such equity
interest in PVIE, a holding company whose main asset is the ownership of 99.79% of the capital stock of Petrobras Energía Perú S.A. In both cases, we sold such equity interests to PIB BV, a subsidiary of Petrobras, for consideration of
U.S.$423.3 million and U.S.$619.4 million, respectively.

The agreed price further includes a contingent
obligation in favor of the Company to reflect the value of the prospectus Kinteroni in market conditions or, alternatively, non-participation of the buyer, and their respective compensation. Such compensation shall be defined by the
parties and stems from the discovery in January 2008 of gas and condensate in the prospectus Kinteroni of Block 57. The Company continues to negotiate with the buyer in order to agree on the appropriate amount of such compensation.

Financing:

We have entered into a number of financing arrangements with subsidiaries of Petrobras, as detailed below.

In 2005, we entered into a U.S.$200 million loan agreement with PIB BV (as lender). The loan had a ten year maturity and accrued interest at a rate of 7.22% per annum, plus taxes. This loan was
repayable at any time without penalty, and was fully prepaid by us on April 5, 2011.

In 2007, we issued
U.S.$300 million principal amount of Series S corporate bonds, secured by a Standby Purchase Agreement provided by Petrobras. This bond matures in May 2017 and accrues interest at a 5.87% annual rate. See Item 5. Operating and Financial Review
and ProspectsDescription of Indebtedness.

In February 2008, we approved the placement of a
short-term financial surplus in PIB BV, in an amount of up to U.S.$300 million, at a nominal annual interest rate (payable monthly) equivalent to 30-day Libor plus 0.15%, due July 2008. The loan was partially renewed at maturity for U.S.$200
million. In December 2008, the outstanding balance was refinanced in part by two new loans totaling U.S.$120 million: (i) a U.S.$107 million loan between PIB BV and PESA and (ii) a U.S.$13 million loan between PIB BV and Petrobras Holding
Austria GMBH, a subsidiary of PESA, both pre-payable and maturing in December 2009. U.S.$30 million was paid on these loans before maturity and U.S.$90 million was renewed for subsequent periods until ultimately being cancelled in May 2012.

In December 2009, we entered into two loans in an aggregate principal amount of U.S.$150 million, secured by
Petrobras: one loan granted by Banco Itaú Europa, in the amount of U.S.$100 million, to be repaid in seven semi-annual installments with a final payment date in December 2013, and a second loan granted by HSBC Bank USA in the amount of
U.S.$50 million, due June 2012. Both of the above mentioned loans were prepaid by us during 2011, and as a result, the guarantees were cancelled.



131



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##### Table of Contents

Commercial operations:

In the ordinary course of business, we enter into transactions with Petrobras associates to import and export crude oil
and related oil products, at determinable market prices and terms, particularly with Braskem and Petrobras Global Trading BV.

These sales are undertaken in the ordinary course of business and at determinable market terms and prices.

The outstanding balances from our transactions with related companies (including companies under joint control) as of December 31, 2013, 2012 and 2011 are as follows (in millions of pesos):



|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|------------------------------------------------ |  | ---------------- | -- |  | ---------------- |  | --- | --------------- |  |  | ---------- |  |  | ---------------- | --- |  | ---------- |  | --- |  |  |  | --- | 
|                                                 |  | 2013             |   
|                                                 |  | Current          |    |  | Non-current      | 
|Company                                          |  | TradeReceivables |    |  | OtherReceivables |  |     | AccountsPayable |  |  | Provisions |  |  | OtherInvestments |     |  | Provisions | 
|Associates                                       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     | 
|OCP                                              |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 92  |  |            |  | 127 |  |  |  | 288 | 
|Refinor                                          |  |                  | 4  |  |                  |  | 13  |                 |  |  | 7          |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Other                                            |  |                  | 6  |  |                  |  | 109 |                 |  |  | 6          |  |  |                  | 7   |  |            |  | 1   |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|                                                 |  |                  | 10 |  |                  |  | 122 |                 |  |  | 13         |  |  |                  | 99  |  |            |  | 128 |  |  |  | 288 | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Entities under joint control                     |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     | 
|TGS                                              |  |                  | 21 |  |                  |  | 8   |                 |  |  | 12         |  |  |                  |    |  |            |  |    |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|                                                 |  |                  | 21 |  |                  |  | 8   |                 |  |  | 12         |  |  |                  |    |  |            |  |    |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Petroleo Brasileiro Group Companies              |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     | 
|Braskem S.A.                                     |  |                  |   |  |                  |  |    |                 |  |  | 60         |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petrobras Chile Ltda.                            |  |                  |   |  |                  |  | 5   |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petrobras Internacional - Braspetro B.V.         |  |                  |   |  |                  |  | 237 |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petrobras Venezuela Inversiones y Servicios S.A. |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 16  |  |            |  |    |  |  |  |    | 
|Innova                                           |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petrobras Global Trading B.V.                    |  |                  | 1  |  |                  |  |    |                 |  |  | 1          |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petroleo Brasileiro                              |  |                  | 1  |  |                  |  | 3   |                 |  |  | 144        |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petroleo Colombia Combustibles S.A.              |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Other                                            |  |                  | 10 |  |                  |  | 34  |                 |  |  | 9          |  |  |                  |    |  |            |  |    |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|                                                 |  |                  | 12 |  |                  |  | 279 |                 |  |  | 214        |  |  |                  | 16  |  |            |  |    |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Total                                            |  |                  | 43 |  |                  |  | 409 |                 |  |  | 239        |  |  |                  | 115 |  |            |  | 128 |  |  |  | 288 | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 



|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|------------------------------------------------ |  | ---------------- | -- |  | ---------------- |  | --- | --------------- |  |  | ---------- |  |  | ---------------- | --- |  | ---------- |  | -- |  |  |  | --- | 
|                                                 |  | 2012             |   
|                                                 |  | Current          |    |  | Non-current      | 
|Company                                          |  | TradeReceivables |    |  | OtherReceivables |  |     | AccountsPayable |  |  | Provisions |  |  | OtherInvestments |     |  | Provisions | 
|Associates                                       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|OCP                                              |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 97  |  |            |  | 97 |  |  |  | 283 | 
|Refinor                                          |  |                  | 9  |  |                  |  | 14  |                 |  |  | 22         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Other                                            |  |                  | 1  |  |                  |  | 8   |                 |  |  | 10         |  |  |                  | 9   |  |            |  | 1  |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|                                                 |  |                  | 10 |  |                  |  | 22  |                 |  |  | 32         |  |  |                  | 106 |  |            |  | 98 |  |  |  | 283 | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Entities under joint control                     |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|TGS                                              |  |                  | 49 |  |                  |  | 6   |                 |  |  | 39         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|                                                 |  |                  | 49 |  |                  |  | 6   |                 |  |  | 39         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Petroleo Brasileiro Group Companies              |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Braskem S.A.                                     |  |                  |   |  |                  |  |    |                 |  |  | 16         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petrobras Chile Ltda.                            |  |                  |   |  |                  |  | 4   |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petrobras Internacional - Braspetro B.V.         |  |                  |   |  |                  |  | 152 |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petrobras Venezuela Inversiones y Servicios S.A. |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 31  |  |            |  |   |  |  |  |    | 
|Innova                                           |  |                  | 6  |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petrobras Global Trading B.V.                    |  |                  | 27 |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petroleo Brasileiro                              |  |                  |   |  |                  |  | 425 |                 |  |  | 85         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petroleo Colombia Combustibles S.A.              |  |                  |   |  |                  |  | 11  |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Other                                            |  |                  |   |  |                  |  | 43  |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|                                                 |  |                  | 33 |  |                  |  | 635 |                 |  |  | 101        |  |  |                  | 31  |  |            |  |   |  |  |  |    | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Total                                            |  |                  | 92 |  |                  |  | 663 |                 |  |  | 172        |  |  |                  | 137 |  |            |  | 98 |  |  |  | 283 | 
|                                                 |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 



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##### Table of Contents

|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 
|------------------------------------------------ |  | ----------------------- | --- |  | ---------------- |  | -- | ---------------- |  |  | --------------- |  |  | ---------- | --- |  | ---------------- |  | --- | ---------------- |  |  | --------------- |  |  | ---------- | --- |  |  |  | -- |  |  |  | --- | 
|                                                 |  | 2011                    |    
|                                                 |  | Current                 |     |  | Non-current      | 
|Company                                          |  | Cash andcashequivalents |     |  | TradeReceivables |  |    | OtherReceivables |  |  | AccountsPayable |  |  | Provisions |     |  | OtherInvestments |  |     | OtherReceivables |  |  | AccountsPayable |  |  | Provisions |    
|Associates                                       |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     | 
|OCP                                              |  |                         |    |  |                  |  |   |                  |  |  |                |  |  |            |    |  |                  |  | 83  |                  |  |  | 141             |  |  |            |    |  |  |  |   |  |  |  | 273 | 
|PELSA                                            |  |                         |    |  |                  |  |   |                  |  |  |                |  |  |            | 19  |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  | 38 |  |  |  |    | 
|Refinor                                          |  |                         |    |  |                  |  | 2  |                  |  |  | 17              |  |  |            | 18  |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|Other                                            |  |                         |    |  |                  |  | 12 |                  |  |  | 29              |  |  |            | 2   |  |                  |  | 5   |                  |  |  | 7               |  |  |            |    |  |  |  |   |  |  |  |    | 
|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 
|                                                 |  |                         |    |  |                  |  | 14 |                  |  |  | 46              |  |  |            | 39  |  |                  |  | 88  |                  |  |  | 148             |  |  |            |    |  |  |  | 38 |  |  |  | 273 | 
|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 
|Entities under joint control                     |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     | 
|TGS                                              |  |                         |    |  |                  |  | 45 |                  |  |  |                |  |  |            | 30  |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 
|                                                 |  |                         |    |  |                  |  | 45 |                  |  |  |                |  |  |            | 30  |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 
|Petroleo Brasileiro Group Companies              |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     | 
|Braskem S.A.                                     |  |                         |    |  |                  |  |   |                  |  |  |                |  |  |            | 61  |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|Petrobras Chile Ltda.                            |  |                         |    |  |                  |  |   |                  |  |  | 2               |  |  |            |    |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|Petrobras Internacional - Braspetro B.V.         |  |                         | 387 |  |                  |  |   |                  |  |  | 133             |  |  |            |    |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|Petrobras International Finance Co.              |  |                         |    |  |                  |  | 2  |                  |  |  |                |  |  |            |    |  |                  |  |    |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|Petrobras Venezuela Inversiones y Servicios S.A. |  |                         |    |  |                  |  |   |                  |  |  |                |  |  |            |    |  |                  |  | 23  |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|Innova                                           |  |                         |    |  |                  |  | 20 |                  |  |  |                |  |  |            |    |  |                  |  | 3   |                  |  |  |                |  |  |            |    |  |  |  |   |  |  |  |    | 
|Petroleo Brasileiro                              |  |                         |    |  |                  |  | 1  |                  |  |  | 35              |  |  |            | 91  |  |                  |  |    |                  |  |  |                |  |  |            | 450 |  |  |  |   |  |  |  |    | 
|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 
|                                                 |  |                         | 387 |  |                  |  | 23 |                  |  |  | 170             |  |  |            | 152 |  |                  |  | 26  |                  |  |  |                |  |  |            | 450 |  |  |  |   |  |  |  |    | 
|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 
|Total                                            |  |                         | 387 |  |                  |  | 82 |                  |  |  | 216             |  |  |            | 221 |  |                  |  | 114 |                  |  |  | 148             |  |  |            | 450 |  |  |  | 38 |  |  |  | 273 | 
|                                                 |  |                         |     |  |                  |  |    |                  |  |  |                 |  |  |            |     |  |                  |  |     |                  |  |  |                 |  |  |            |     |  |  |  |    |  |  |  |     | 

The main transactions with related companies (including entities under joint control) for
the fiscal years ended December 31, 2013, 2012 and 2011 are as follows (in millions of pesos):



|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|------------------------------------------------ |  | --------- | --- |  | ----- |  | --- | --------- |  |  | ----- |  |  | --------- | --- |  | ----- |  | ----- |  |  |  | --- | 
|                                                 |  | 2013      |     |  | 2012  |  |     | 2011      | 
|Company                                          |  | Purchases |     |  | Sales |  |     | Purchases |  |  | Sales |  |  | Purchases |     |  | Sales | 
|Associates                                       |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|Oldelval                                         |  |           | 46  |  |       |  | 3   |           |  |  | 37    |  |  |           | 3   |  |       |  | 31    |  |  |  | 3   | 
|PELSA(1)                                         |  |           |    |  |       |  |    |           |  |  | 5     |  |  |           | 2   |  |       |  | 148   |  |  |  | 4   | 
|Refinor                                          |  |           | 86  |  |       |  | 42  |           |  |  | 124   |  |  |           | 35  |  |       |  | 108   |  |  |  | 43  | 
|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|                                                 |  |           | 226 |  |       |  | 52  |           |  |  | 166   |  |  |           | 40  |  |       |  | 287   |  |  |  | 50  | 
|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|Entities under joint control                     |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|TGS                                              |  |           | 68  |  |       |  | 202 |           |  |  | 82    |  |  |           | 91  |  |       |  | 109   |  |  |  | 50  | 
|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|                                                 |  |           | 68  |  |       |  | 202 |           |  |  | 82    |  |  |           | 91  |  |       |  | 109   |  |  |  | 50  | 
|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|Petroleo Brasileiro Group Companies              |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|Braskem (Copesul)                                |  |           | 471 |  |       |  |    |           |  |  | 646   |  |  |           |    |  |       |  | 1,114 |  |  |  |    | 
|Petrobras International Finance Co.              |  |           |    |  |       |  |    |           |  |  |      |  |  |           |    |  |       |  | 128   |  |  |  | 5   | 
|Petroleo Brasileiro                              |  |           | 122 |  |       |  | 17  |           |  |  | 66    |  |  |           | 28  |  |       |  | 150   |  |  |  | 157 | 
|Compañía Mega S.A.                               |  |           |    |  |       |  | 7   |           |  |  |      |  |  |           | 7   |  |       |  |      |  |  |  | 36  | 
|Petrobras Internacional - Braspetro B.V.         |  |           |    |  |       |  |    |           |  |  | 80    |  |  |           |    |  |       |  |      |  |  |  |    | 
|Petrobras Paraguay Operaciones y Logística S.R.L |  |           |    |  |       |  | 47  |           |  |  |      |  |  |           | 46  |  |       |  |      |  |  |  | 28  | 
|Petrobras Global Trading B.V.                    |  |           | 41  |  |       |  |    |           |  |  | 192   |  |  |           | 27  |  |       |  |      |  |  |  |    | 
|Innova                                           |  |           |    |  |       |  | 173 |           |  |  | 1     |  |  |           | 151 |  |       |  | 8     |  |  |  | 133 | 
|Petrobras Chile Distribución Limitada            |  |           |    |  |       |  | 27  |           |  |  |      |  |  |           |    |  |       |  |      |  |  |  |    | 
|Other                                            |  |           | 3   |  |       |  |    |           |  |  | 3     |  |  |           | 10  |  |       |  |      |  |  |  | 19  | 
|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|                                                 |  |           | 637 |  |       |  | 271 |           |  |  | 988   |  |  |           | 269 |  |       |  | 1,400 |  |  |  | 378 | 
|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 
|Total                                            |  |           | 945 |  |       |  | 414 |           |  |  | 1,236 |  |  |           | 400 |  |       |  | 1,796 |  |  |  | 478 | 
|                                                 |  |           |     |  |       |  |     |           |  |  |       |  |  |           |     |  |       |  |       |  |  |  |     | 



|(1) | Through May 31,2012, due to the acquisition of a controlling interest in PELSA as of such date.
|--- | -----------------------------------------------------------------------------------------------

We have not entered into any other material related party transactions.



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Item 8. FINANCIAL INFORMATION

CONSOLIDATED FINANCIAL STATEMENTS

See Item 18. Financial Statements.

LEGAL PROCEEDINGS

We are
involved in various litigation and regulatory proceedings arising in the ordinary course of our business. We do not believe that any of these proceedings is material to our operations or financial condition.

DIVIDENDS

We may only pay dividends from our retained earnings that are reflected in our annual audited consolidated financial statements as approved at our respective annual general regular shareholders
meetings. Payment of cash dividends depends upon our financial position, results of operations, cash requirements (including capital expenditures and payments of debt service), retained earnings minimum requirements and other requirements imposed by
Argentine law, and upon any other factors deemed relevant by our Board of Directors for the purpose of resolving upon the declaration of dividends.

While our Board of Directors may declare interim dividends pursuant to an audited interim-period financial statement, our Board of Directors or our Statutory Audit Committee would be jointly and severally
liable for any payments made in excess of retained earnings at fiscal year closing. The declaration, amount and payment of dividends to shareholders are subject to approval by a regular shareholders meeting.

Under our bylaws, our net income shall be allocated as follows: (a) 5% to a legal reserve, until that reserve equals
20% of outstanding capital; (b) to compensation of the members of the Board of Directors and Statutory Supervisory Committee; (c) to dividends on preferred stock, if any; and then (d) to dividends on common stock or to a voluntary
reserve, or to a new account, or as otherwise determined by the shareholders meeting. Dividends shall be paid within the year of their declaration and distributed pro rata to the number of common shares held by each shareholder.

Holders of ADSs will be entitled to receive any dividends payable in respect of our underlying Class B shares. We will
pay cash dividends to the depositary in pesos, although we reserve the right to pay cash dividends in any other currency, including U.S. dollars. The deposit agreement provides that the depositary will convert cash dividends received by the
depositary in pesos into U.S. dollars and, after a deduction or upon payment of fees and expenses of the depositary and any applicable taxes, will make payment to holders of the applicable ADSs in U.S. dollars.

Under Law No. 25,063, any dividends distributed, in cash or in kind, in excess of the taxable income accumulated as
of the year-end immediately prior to the respective payment or distribution date, will be subject to a 35% (thirty-five percent) income tax withholding, as single and definitive payment. For this purpose, taxable income is deemed to be that
resulting from adding the income as determined under the general provisions of the income tax law and the dividends or income obtained from other corporations not taken into account in determining the former for the same tax period or periods.

Under the amendment introduced by Law No. 26,893 (regulated by Regulatory Decree No. 2,334/13), any
dividend payments to our Argentine individual shareholders and undivided estates as well to our foreign shareholders are subject to income tax at a 10% (ten percent) rate, as one-time and definitive payment, without prejudice to the 35% (thirty-five
percent) withholding as may be applicable under Law No. 25,063. See Item 10. Additional InformationTaxationArgentine Taxes.

Pursuant to the resolutions adopted at the shareholders meetings held on March 29, 2012 and April 6, 2011 in 2012 and 2011 we paid cash dividends in the amount of Ps. 211 million and
Ps. 183 million, respectively.

PESAs shareholders meeting held on March 21, 2013:
(a) approved (i) in accordance with legal requirements an increase of Ps. 524 million in the reserve for future investments and the transfer to the legal reserve of Ps. 31 million based on our results in 2012, and (ii) a net
decrease of Ps. 361 million in the reserve for future



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investments (consisting of an increase in the amount of Ps. 2,638 million and a decrease in the amount of Ps. 2,999 million) and an increase of Ps. 361 million in the reserve for future
dividends; and (b) delegated with the Board of Directors the determination of the actual dividend distribution date and amount.

PESAs shareholders meeting held on March 27, 2014: (a) approved (i) in accordance with legal requirements, an increase of Ps. 714 million in the reserve for future
investments and the transfer to the legal reserve of Ps. 38 million based on our results in 2013, and (ii) a net decrease of Ps. 225 million in the reserve for future investments (consisting of an increase in the amount of Ps.
2,299 million and a decrease in the amount of Ps. 2,524 million), and an increase of Ps. 225 million in the reserve for future dividends; and (b) delegated with the Board of Directors the determination of the actual dividend
distribution date and amount. As a result of the foregoing, as of the date of this Annual Report, the reserve for future dividends amounts to Ps. 1,275 million and the reserve for future investments amounts to Ps. 5,432 million.

Item 9. OFFER AND LISTING

Our ADSs, each representing ten Class B shares, are listed on the NYSE under the trading symbol PZE. The ADSs
began trading on the NYSE on September 30, 2009 following the completion of the merger and exchange of shares between PESA and PEPSA, and were issued by Citibank, N.A. as depositary.

Our Class B shares have been listed on the Buenos Aires Stock Market since 1956. Currently the trading symbol thereof is
PESA.

The following table sets forth, for the periods indicated, the high and low closing sales
price of the ADSs on the NYSE and the Class B shares of PESA on the Buenos Aires Stock Market:



|                 |  |             |       |     |                    |  |       |      |  |  |       |  |  |  |      | 
|---------------- |  | ----------- | ----- | --- | ------------------ |  | ----- | ---- |  |  | ----- |  |  |  | ---- | 
|                 |  | ADS (1)
(3) |       |     | Class B share 
(2) | 
|Full Year        |  | High        |       |     | Low                |  |       | High |  |  | Low   | 
|2008             |  |             |       |     |                    |  |       |      |  |  | 13.10 |  |  |  | 6.30 | 
|2009             |  |             | 19.40 | (3) |                    |  | 15.54 | (3)  |  |  | 7.55  |  |  |  | 5.20 | 
|2010             |  |             | 26.38 |     |                    |  | 12.91 |      |  |  | 10.65 |  |  |  | 5.20 | 
|2011             |  |             | 28.20 |     |                    |  | 12.16 |      |  |  | 11.35 |  |  |  | 5.78 | 
|2012:            |  |             |       |     |                    |  |       |      |  |  |       |  |  |  |      | 
|First Quarter    |  |             | 17.13 |     |                    |  | 12.48 |      |  |  | 7.90  |  |  |  | 6.22 | 
|Second Quarter   |  |             | 12.97 |     |                    |  | 7.26  |      |  |  | 6.75  |  |  |  | 4.76 | 
|Third Quarter(4) |  |             | 4.79  |     |                    |  | 3.89  |      |  |  | 3.10  |  |  |  | 2.51 | 
|Fourth Quarter   |  |             | 5.20  |     |                    |  | 3.89  |      |  |  | 3.39  |  |  |  | 2.72 | 
|2013:            |  |             |       |     |                    |  |       |      |  |  |       |  |  |  |      | 
|First Quarter    |  |             | 5.98  |     |                    |  | 4.64  |      |  |  | 4.49  |  |  |  | 3.40 | 
|Second Quarter   |  |             | 4.94  |     |                    |  | 3.47  |      |  |  | 4.57  |  |  |  | 2.86 | 
|Third Quarter(4) |  |             | 5.64  |     |                    |  | 3.55  |      |  |  | 5.05  |  |  |  | 2.79 | 
|Fourth Quarter   |  |             | 7.24  |     |                    |  | 5.34  |      |  |  | 6.39  |  |  |  | 4.94 | 
|November 2013    |  |             | 7.24  |     |                    |  | 6.10  |      |  |  | 6.39  |  |  |  | 5.54 | 
|December 2013    |  |             | 6.93  |     |                    |  | 5.55  |      |  |  | 6.01  |  |  |  | 5.08 | 
|2014:            |  |             |       |     |                    |  |       |      |  |  |       |  |  |  |      | 
|January 2014     |  |             | 5.58  |     |                    |  | 4.50  |      |  |  | 5.50  |  |  |  | 4.77 | 
|February 2014    |  |             | 5.32  |     |                    |  | 4.34  |      |  |  | 5.49  |  |  |  | 4.90 | 
|March 2014       |  |             | 5.55  |     |                    |  | 4.67  |      |  |  | 5.40  |  |  |  | 4.78 | 
|April 2014(5)    |  |             | 5.91  |     |                    |  | 5.10  |      |  |  | 5.67  |  |  |  | 5.05 | 



|(1) | In U.S. dollars.
|--- | ----------------

|(2) | In Argentine pesos.
|--- | -------------------

|(3) | Since September 30, 2009.
|--- | -------------------------

|(4) | The price since September 2012 reflects the effects of a capital increase approved on March 29, 2012 by the shareholders of the Company and
carried out starting September 26, 2012. This increase represented the partial capitalization of retained earnings of the Company, and had the effect of doubling the number of our Class B shares outstanding.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(5) | Through April 15, 2014.
|--- | -----------------------



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MARKETS

Buenos Aires Stock Market

The Buenos Aires Stock Market, which is affiliated with the Buenos Aires Stock Exchange, is the largest stock market in Argentina. The Buenos Aires Stock Market is a corporation whose shareholder members
are the only individuals and entities authorized to trade in the securities listed on the Buenos Aires Stock Exchange. Trading on the Buenos Aires Stock Exchange floor is conducted by continuous open outcry and a computer-based trading system called
SINAC from 11:00 a.m. to 5:00 p.m. each business day. The Buenos Aires Stock Exchange also operates an electronic trading market system from 11:00 a.m. to 5:00 p.m. each business day.

To control price volatility, the Buenos Aires Stock Market operates a system by which trading of a security is suspended
for 15 minutes whenever the price of such security changes 10% from its last closing price. Once the 15 minutes have elapsed, trading is resumed. From that point on during a trading day, trading will be suspended for ten minutes whenever the trading
price changes 5% from the last suspended price.

New Capital Markets Law  Law No. 26,831

On December 28, 2012, the new Capital Markets Law (Law No. 26,831) (the Capital Markets Law) was
published in the Official Gazette. This law eliminates self-regulation of the capital markets and grants new powers to the CNV, including the ability to request reports and documents, to conduct investigations and inspections of natural and legal
persons under its control, and to call such persons to testify and take informational and testimonial declarations. Likewise, if as a result of investigations performed, it is determined that non-controlling interests or the interests of holders of
securities subject to public offering have been harmed, the CNV, according to the severity of the harm determined to have been caused, may appoint overseers with the power to veto resolutions adopted by the boards of directors and/or suspend the
boards of directors of relevant companies for a maximum period of 180 days until the deficiencies found are determined to have been remedied.

Certain information regarding the Buenos Aires Stock Market is set forth in the table below:



|                                                    |  |      |        |   |      |  |       |      |  |  |        |   |  |      |        |   |  |  |        |  
|--------------------------------------------------- |  | ---- | ------ | - | ---- |  | ----- | ---- |  |  | ------ | - |  | ---- | ------ | - |  |  | ------ | -
|                                                    |  | 2013 |        |   | 2012 |  |       | 2011 |  |  | 2010   |   |  | 2009 |       
|Market capitalization (billions of pesos)           |  |      | 3,356  |   |      |  | 2,314 |      |  |  | 1,610  |   |  |      | 1,900  |   |  |  | 2,184  |  
|As a percentage of GDP(1)                           |  |      | 124    | % |      |  | 106   | %    |  |  | 86.3   | % |  |      | 132    | % |  |  | 187    | %
|Volume (in millions of pesos)                       |  |      | 18,945 |   |      |  | 9,954 |      |  |  | 13,579 |   |  |      | 14,955 |   |  |  | 11,221 |  
|Average daily trading volume (in millions of pesos) |  |      | 78.60  |   |      |  | 41.30 |      |  |  | 55.40  |   |  |      | 60.79  |   |  |  | 45.99  |  
|Number of listed companies(1)                       |  |      | 105    |   |      |  | 107   |      |  |  | 105    |   |  |      | 107    |   |  |  | 88     |  



|(1) | End-of-year figures for trading on the Buenos Aires Stock Exchange.
|--- | -------------------------------------------------------------------

Sources: The Bolsa de Comercio de Buenos Aires, the CNV and the Instituto Argentino de Mercado de Capitales.



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Item 10. ADDITIONAL INFORMATION

MEMORANDUM AND ARTICLES OF ASSOCIATION

Registration and Merger

Our bylaws (estatutos sociales) were authorized by Decree No. 17105 dated June 18, 1947, and registered with the IGJ on November 17, 1947 under No. 759, Page 569, Book 47,
Volume A of Argentine Bylaws. Amendments to the bylaws were authorized as indicated below, and registered as amended with the Public Registry of Commerce as follows: (1) as amended and authorized by Decree No. 29,460 dated
September 24, 1948, and registered on May 27, 1949, under No. 369, Page 332, Book 48, Volume A, of Argentine Bylaws; (2) as amended and authorized by Decree No. 10,460 dated June 24, 1954, and registered on
October 4, 1954, under No. 1,323, Page 508, Book 49, Volume A, of Argentine Bylaws; (3) as amended and authorized by Decree No. 3,789 dated February 28, 1956, and registered on September 5, 1956, under No. 1,686,
Page 238, Book 50, Volume A, of Argentine Bylaws; (4) as amended and authorized by Decree No. 3,773 dated August 11, 1958, and registered on March 2, 1959, under No. 289, Page 391, Book 51, Volume A of Argentine Bylaws;
(5) as amended and authorized by Decree No. 5,405 of the Argentine government dated June 12, 1962, and registered on September 28, 1962, under No. 2,161, Page 347, Book 55, Volume A of Argentine Bylaws; (6) as amended
and authorized by Resolution issued by PJ (Board of Legal Entities) No. 001129, Ministry of Education and Justice, dated June 19, 1963, and registered on September 24, 1963, under No. 1,656, Page 109, Book 58, Volume A of
Argentine Bylaws; (7) as amended and authorized by IGJ Resolution No. 6,307, Ministry of Justice, dated March 13, 1970, and registered on May 14, 1970, under No. 1,782, Page 56, Book 72, Volume A of Argentine Stock
Corporations Bylaws; (8) as amended and authorized by I.G.P.J. (Board of Legal Entities) Resolution No. 2,116, Superintendent of Legal Entities, dated April 29, 1971, and registered on July 7, 1971, under No. 2,286, Page
287, Book 74, Volume A of Argentine Stock Corporations Bylaws; (9) as amended and authorized by I.G.P.J. (Board of Legal Entities) Resolution No. 2,687, Superintendent of Legal Entities, dated August 28, 1972, and registered on
December 28, 1972, under No. 4,555, Page 479, Book 77, Volume A of Argentine Stock Corporations Bylaws; (10) as amended and registered on November 16, 1976, under No. 3,917, Book 84, Volume A of Argentine Stock Corporations
Bylaws; (11) as amended and registered on July 8, 1977, under No. 2,237, Book 87, Volume A of Argentine Stock Corporations Bylaws; (12) as amended and registered on December 21, 1978, under No. 4,912, Book 88, Volume A
of Argentine Stock Corporations Bylaws; (13) as amended and registered on December 6, 1979, under No. 4,401, Book 90, Volume A of Argentine Stock Corporations Bylaws; (14) as amended and registered on March 25, 1981, under
No. 1,105, Book 97, Volume A of Stock Corporations; (15) as amended and registered on February 21, 1983, under No. 545, Book 98, Volume A of Argentine Argentine Stock Corporations; (16) as amended and registered on
March 21, 1984, under No. 1,551, Book 99, Volume A of Argentine Stock Corporations; (17) as amended and registered on March 31, 1986, under No. 1,739, Book 101, Volume A of Argentine Stock Corporations; (18) as amended
and registered on January 22, 1992, under No. 372, Book 110, Volume A of Argentine Stock Corporations; (19) as amended and registered on October 3, 1995, under No. 9223, Book 117, Volume A of Argentine Stock Corporations;
(20) as amended registered on November 11, 1996, under No. 11,209, Book 120, Volume A of Argentine Stock Corporations; (21) as amended and registered on May 15, 1997, under No. 4894, Book 121, Volume A of Argentine
Stock Corporations; (22) as amended and registered on June 11, 1998 under No. 3812, Book 1, Volume of Corporations; (23) as amended and registered on July 14, 2000 under No. 10116, Book 11, Volume of Corporations;
(24) as amended and registered on October 26, 2000 under No. 16073, Book 13, Volume of Corporations; (25) as amended and registered on September 3, 2002, under No. 9737, Book 18, Volume of Corporations; (26) as
amended and registered on February 12, 2003, under No. 2042, Book 19, Volume of Corporations; (27) as amended and registered on July 4, 2003, under No. 9191, Book 22, Volume of Corporations; (28) as amended and
registered on August 22, 2003, under No. 11892, Book 22, Volume of Corporations; (29) as amended and registered on May 3, 2004, under No. 5377, Book 24, Volume of Corporations; (30) as amended and registered on
November 29, 2004 under No. 15158, Book 26, Volume of Corporations; (31) as amended and registered on June 30, 2005 under No. 7618, Book 28, Volume of Corporations; (32) as amended and registered on January 26,
2009 under No. 1537, Book 43, Volume of Corporations; (33) as amended and registered on August 4, 2009 under No. 12887, Book 45, Volume of Corporations; (34) as adopted by the extraordinary and regular shareholders
meeting held on January 30, 2009, and to be registered in the Volume of Corporations; and (35) as adopted by the extraordinary and regular shareholders meeting held on March 27, 2009, and to be registered in the Volume of
Corporations.



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Objects and Purposes

Section 3 of our bylaws states that the object and purposes of the company is to do and engage in the following:

(a) perform the following operations:



| | (1) | explore, exploit, prospect for, detect, bore and drill hydrocarbons and any other kind of wells, as well as carry out activities related to
mining extraction in general;
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) | purchase, sell, lease and operate drilling equipment, its spare parts and accessories and enter into any contract, to perform any act and carry out
any operation related to mining extraction;
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (3) | manufacture, process, industrialize, purchase, sell, import, export and transport its own or third parties hydrocarbons and their by-products,
whether they be liquid, solid or gaseous; and
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (4) | enter into any kind of contracts for work and/or of service related to the aforementioned activities;
| | --- | -----------------------------------------------------------------------------------------------------

(b) commercial transactions through the import, export, purchase and sale, transportation and distribution of products and
goods related to electric power and mining, including the exercise or performance of representations, commissions, consignments and agencies;

(c) financial transactions in general, including: loans and/or capital contributions to individuals or companies for present or future businesses; granting of bonds, guaranties and suretyships in favor of
third parties; purchase and sale and management of shares, public bonds, debentures and other securities, except for the transactions stipulated in the limitations provided for in the Financial Entities Law and those transactions requiring public
bidding;

(d) real estate transactions through the acquisition, sale, barter, construction, fractionation,
exploitation and lease of urban and rural real estate, including cooperative property transactions and the creation of rightsin rem;

(e) operation of navigation and maritime fluvial trade companies;

(f) power generation, transformation, transmission and distribution operations; and

(g) to render services or act as agent for itself or in favor of third parties.

In carrying out the aforementioned purposes and object, PESA has full capacity to perform any act, enter into any
contract and carry out any transaction directly or indirectly related thereto.

Provisions of the Bylaws Relating to
Directors

Section 9 of the bylaws states that the Board of Directors shall hold a meeting with
the majority of its members present at the meeting, whether in person or remotely as long as they can each communicate among themselves through other means of simultaneous sound, image or word transmission, and shall adopt resolutions by the
majority of the votes present thereat, including remote participants. The Board of Directors meets formally at least once every three months, and is composed of nine members. All members of the Board of Directors have one vote for any matter decided
upon. For more information on the election of PESAs Board of Directors, see Item 6. Directors, Senior Management, and EmployeesDirectors and Senior ManagementPetrobras Argentina S.A. Board of Directors.

In accordance with our bylaws, in the event any members of the Board of Directors refrain from voting on account of
having a conflict of interest or material interest in the matter at hand, the Board of Directors shall adopt resolutions by a majority of the members who did not refrain from voting for such reason. Participation and vote of remote participants as
well as all transmission of data shall be registered in the minutes of the meetings. The Argentine Companies Law requires that directors refrain from voting on matters in which such director may have a conflict of interest.



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Capital Stock

The description that follows provides a summary of the material provisions of our capital stock, in accordance with our
bylaws and Argentine law and regulations.

Voting Rights

Each PESA Class B share entitles the holder to one vote.

All existing PESA Class A shares were converted into PESA Class B shares on March 11, 2009. There are no PESA
Class A shares currently outstanding.

Cumulative Voting

Under the Argentine Companies Law, a shareholder is entitled to cumulative voting procedures for the election of up to
one-third of the directors being elected. If any shareholder notifies us of its decision to exercise its cumulative voting rights no later than three business days prior to the date of a meeting, all shareholders are entitled, but not required, to
exercise their cumulative voting rights. Under cumulative voting, the aggregate number of votes that a shareholder may cast is multiplied by the number of vacancies to be filled in the election, and each shareholder may allocate the total number of
its votes among a number of candidates not to exceed one-third of the number of vacancies to be filled. Shareholders not exercising cumulative voting rights are entitled to cast the number of votes corresponding to their shares for each candidate.
The implementation of a staggered board does not impede or prohibit the exercise of cumulative voting in any manner.

Preemptive Rights

In the event of a capital increase, a holder of existing common shares of a given class has a preemptive right to subscribe for a number of shares of the same class sufficient to maintain the
holders existing proportionate holdings of shares of that class.

Preemptive rights also apply to the
issuance of certain convertible securities (obligaciones negociables) but do not apply upon conversion of these securities. Holders of ADSs may be restricted in their ability to exercise preemptive rights if a prospectus under the Securities
Act relating to those securities has not been filed or is not effective or an exemption from registration is not available. You should note that we are not obligated to file a registration statement with respect to the shares relating to preemptive
or accretion rights. Preemptive rights are exercisable during the 30 days following the last publication of notice to the shareholders in the Official Gazette and an Argentine newspaper of wide circulation. Pursuant to the Argentine Companies Law,
the 30-day period may be reduced to ten days by a decision of our shareholders adopted at an extraordinary shareholders meeting. Preemptive rights may be suspended or limited in extraordinary circumstances with the favorable vote of more than
50% of all outstanding voting shares at an extraordinary shareholders meeting at which all shares will be entitled to exercise one vote, regardless of whether there are shares with multiple votes where the purpose of the capital increases is
to issue shares as consideration for a contribution of assets to the company or to repay outstanding obligations.

Shareholders who have exercised their preemptive rights and indicated their intention to exercise additional preemptive rights are entitled to accretion rights, pro rata to their respective subscriptions,
with respect to any unsubscribed shares by other shareholders during the preemptive rights period, in accordance with the terms of Article 194 et seq. of the Argentine Companies Law. Shares not subscribed by the shareholders by virtue of their
exercise of preemptive rights or accretion rights may be offered to third parties.

Appraisal Rights

Whenever our shareholders approve (1) a spinoff or merger in which we are not the surviving corporation, (2) a
change in our corporate legal status, (3) a fundamental change in our corporate purpose, (4) a change of our domicile to a location outside Argentina, (5) a voluntary withdrawal from a public offering or delisting, (6) the
continuation of our company in the case of a mandatory delisting or cancellation of the authorization for a public offering, (7) a capital increase approved by an extraordinary shareholders meeting which would require a disbursement by
shareholders or (8) a total or partial recapitalization following a mandatory reduction of capital or liquidation, any shareholder that voted against this action may withdraw from our company and receive the book



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value of its shares, determined on the basis of our latest balance sheet prepared or that should have been prepared in accordance with Argentine laws and regulations, provided that this
shareholder exercises its appraisal rights within the period set forth below. However, because of the absence of legal precedent directly on point, there is doubt as to whether holders of our ADSs will be able to exercise appraisal rights either
directly or through the depositary with respect to Class B shares represented by our ADSs. Appraisal rights must be exercised within five days following the adjournment of the meeting at which the resolution was adopted, in the event that the
dissenting shareholder voted against such resolution, or within 15 days following such adjournment if the dissenting shareholder did not attend such meeting and can prove that it was a shareholder on the date of such meeting. In the case of a merger
or spinoff, appraisal rights may not be exercised if the shares to be received as a result of such transaction are authorized for public offering or listed. Appraisal rights are extinguished if the resolution giving rise to such rights is revoked at
another shareholders meeting held within 60 days of the meeting at which the resolution was adopted.

Payment on the appraisal rights must be made within one year of the date of the shareholders meeting at which the
resolution was adopted, except when the resolution was to delist our stock or to continue our company following our mandatory delisting, in which case the payment period is reduced to 60 days from the date of the related resolution.

Acquisition of Class B Shares by Class B Shareholders

Argentine law provides that if any person or group of persons acquires shares or securities convertible into shares
representing at least three percent of a public companys capital stock, then these persons must, within three days following the acquisition, give the company notice of the acquisition, irrespective of any additional notice requirements under
applicable rules of any stock exchange or regulatory agency. The notice must state the acquisition dates and prices, the voting power acquired, the purpose of the acquisition and the intention of the acquiror (including, without limitation, whether
it intends to increase its holding or to obtain control). This provision also applies to subsequent acquisitions involving a number of shares or securities convertible into shares representing at least three percent of the companys capital
stock.

Capital Increases and Reductions

Our capital stock may be increased by resolution of an ordinary shareholders meeting. Capital increases do not
require an amendment of our bylaws, but must be approved by the CNV, published in the Official Gazette and registered with the Public Registry of Commerce. Capital reductions may be voluntary or mandatory. Voluntary reductions of capital must be
approved by an extraordinary shareholders meeting and may take place only after notice is published and creditors are given an opportunity to obtain payment or collateralization of their claims or attachment. Reductions of capital are
mandatory when losses have exceeded reserves or more than 50% of our stated capital.

Shares issued in
connection with any increase in capital must be divided among the various classes in proportion to the number of shares of each class outstanding at the date of the issuance, provided that the number of shares of each class actually issued may vary
based on the exercise of preemptive rights and additional preemptive rights in accordance with the procedure described in the preceding section.

Redemption and Repurchase

Our shares are subject to
redemption in connection with a reduction in capital by the vote of a majority of shareholders at an extraordinary shareholders meeting. Any shares so redeemed must be cancelled by us.

We may repurchase fully paid shares of our capital stock with retained earnings or freely available reserves, upon a
determination of the Board of Directors that this repurchase is necessary in order to avoid a material adverse effect to us. The Board of Directors determination must be explained to shareholders at the next annual shareholders meeting.
We may also repurchase shares of our capital stock held by a company acquired by or merged with us. In either case, we are required to resell the shares purchased within one year and must give shareholders a preemptive right to purchase these
shares. Any shares repurchased by us will not be considered in the determination of a quorum or a majority.



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Preferred Shares

We may issue non-voting preferred shares or preferred shares with one vote per share. The economic preferences and rights
of our preferred shares will be determined at the shareholders meeting authorizing the issue of the preferred shares. Non-voting preferred shares may vote one vote per share in the following circumstances: (1) if we are in default with
respect to the payment of preferred share dividends, (2) if the events described under Meetings of ShareholdersQuorum and Voting Requirements occur, or (3) if the preferred shares have been listed on a stock
exchange and that listing is cancelled or suspended.

Liquidation

The liquidation of our Company may be carried out by our Board of Directors or by one or more liquidators appointed by the
shareholders to wind up its affairs. In the event of liquidation, our assets will be applied to satisfy our debts and liabilities including liquidation expenses. Any remaining amounts will be distributed as follows: (1) the amount of the
preferred shares issued shall be reimbursed at their paid-in, nominal value; (2) the amount of common shares shall be reimbursed at their paid-in, nominal value; (3) cumulative dividends in arrears on preferred shares shall be paid; and
(4) the remaining balance shall be distributed pro rata among all holders of common shares.

Changes in Shareholder
Rights

See Meetings of Shareholders below.

Audit Committee

The bylaws of PESA state that the Company shall have an audit committee composed of three regular directors and an equal or smaller number of alternate members. For more details on our Audit Committee,
see Item 6. Directors, Senior Management and EmployeesBoard PracticesAudit Committee.

Meetings
of Shareholders

General

Shareholders meetings may be ordinary or extraordinary. We are required to hold an ordinary shareholders
meeting within four months of the close of each fiscal year to consider the approval of our annual financial statements, the allocation of net income for the fiscal year, the approval of the reports of the Board of Directors and the Statutory
Supervisory Committee and the election and remuneration of directors and members of the Statutory Supervisory Committee. Other matters that may be considered at an ordinary meeting include the responsibility of directors and members of the Statutory
Supervisory Committee, capital increases and the issuance of certain corporate bonds. Extraordinary shareholders meetings may be called at any time to consider matters outside the scope of authority of an ordinary meeting, including amendment
of the bylaws, issuance of debentures, early dissolution, merger, spinoff, reduction of capital stock and redemption of shares, changing our company from one type of legal entity to another and limitation of shareholders preemptive rights.

Notices

Notice of shareholders meetings must be published for five days in the Boletín Oficial (the official gazette of the Republic of Argentina), in an Argentine newspaper of wide
circulation and in the publications of Argentine exchanges or securities markets in which our shares are traded, at least ten days prior to the date on which the meeting is to be held as per the Argentine Companies Law, and at least 20 days prior to
the meeting as per Decree No. 677/01. The notice must include information regarding the type of meeting to be held, the date, time and place of the meeting and the agenda. If there is no quorum at the meeting, notice for a meeting on second
call must be published for three days, at least eight days before the date of the second meeting, and such second meeting must be held within 30 days of the date for which the first meeting was called. The first call and second call notices may be
effected simultaneously in order for the meeting on second call to be held on the same day as the meeting on first call, but only in the case of ordinary shareholders meetings. Shareholders meetings may be validly held without notice if
all shares of our outstanding capital stock are present and resolutions are adopted by unanimous vote.



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The Board of Directors will determine appropriate publications for notice
outside Argentina in accordance with requirements of jurisdictions and exchanges where our shares and ADSs are traded.

Quorum and Voting Requirements

The quorum for ordinary shareholders meetings on first call is a majority of the shares entitled to vote, and action may be taken by the affirmative vote of an absolute majority of the shares
present that are entitled to vote on such action. If a quorum is not available, a second call meeting may be held at which action may be taken by the holders of an absolute majority of the shares present, regardless of the number of such shares. The
quorum for extraordinary shareholders meetings on first call is 60% of the shares entitled to vote, and if such quorum is not available, a second call meeting may be held, for which there is no quorum requirement.

Action may be taken at extraordinary shareholders meetings by the affirmative vote of an absolute majority of
shares present that are entitled to vote on such action, except that the approval of a majority of shares with voting rights is required in both first and second call for: (1) the transfer of our domicile outside Argentina, (2) a
fundamental change of the corporate object set forth in the bylaws, (3) our anticipated dissolution, (4) the total or partial repayment of capital, (5) a merger of our company, if we are not the surviving entity, (6) a spinoff of
our company, or (7) changing our corporate legal status.

Shareholders meetings may be called by
the Board of Directors or the members of the Statutory Supervisory Committee whenever required by law or whenever they deem it necessary. Also, the Board of Directors or the members of the Statutory Supervisory Committee are required to call
shareholders meetings upon the request of shareholders representing an aggregate of at least five percent of our outstanding capital stock. If the board or the Statutory Supervisory Committee fail to call a meeting following this request, a
meeting may be ordered by the CNV or by the courts. In order to attend a meeting, a shareholder must deposit with us a certificate of book-entry shares registered in its name and issued by Caja de Valores at least three business days prior to the
date on which the meeting is to be held. Shareholders may be represented by proxy. Proxies may not be granted to directors, members of the Statutory Supervisory Committee or officers or employees of our company.

Conflict of Interest

A shareholder who votes on a matter involving our company in which its interest conflicts with ours may, under Argentine law, be liable for damages to us resulting from its decision, but only if the
transaction would not have been approved without its vote.

Limitations on Foreign Investment in Argentina

Under the Argentine Foreign Investment Law, as amended (the FIL), the purchase of stock by
an individual or legal entity domiciled abroad or by a local company of foreign capital (as defined in the FIL) constitutes a foreign investment subject to the FIL. Foreign investments are generally unrestricted. However, foreign investments in
certain industries are restricted to a certain percentage. No approval is necessary to purchase our Class B shares. The FIL does not limit the right of non-resident or foreign owners to hold or vote our Class B shares, and there are no restrictions
in our bylaws limiting the rights of non-residents or non-Argentines to hold or vote our Class B shares.

However, General Resolution No. 7 passed in September 2003 by the IGJ and other related regulations set forth
certain requirements for foreign entities registered with the IGJ. These regulations require, among other things, disclosure of information related to proprietary interests in assets located outside Argentina to be at least equivalent in value to
those located inside Argentina. The entities must comply with these requirements in order to (1) perform activities on a regular basis through their Argentine branches (Section 118, Argentine Companies Law), or (2) exercise their ownership
rights in Argentine Companies (Section 123, Argentine Companies Law). In cases where: (a) do not have assets outside Argentina; (b) the IGJ has concluded that the entities have non-current assets that are not materially significant
compared to those non-current assets which are owned by them and located in Argentina; or (c) the entitys address in Argentina becomes the place where this entity makes a majority of its decisions, corporate or otherwise, the entities may
be required to amend and register their bylaws to comply with Argentine law, thereby becoming an Argentine entity subject to Argentine law according to Section 124 of the Argentine Companies Law. In addition, Argentine companies with
shareholders consisting of such entities that fail to comply with these requirements may be subject to the following sanctions: (1) the IGJ may not register corporate decisions adopted by the Argentine company when its offshore shareholder
votes as a shareholder and when that vote is essential in attaining a majority and any decisions made pursuant to such vote related to the approval of its annual



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balance sheet may be declared null and void for administrative purposes; (2) whether or not the vote of the offshore entity is necessary for purposes of determining quorum or majority, the
IGJ may register the decision without considering that vote; and (3) the directors of the Argentine company may be held personally liable for actions taken by the Argentine company.

Change of Control

In 2001, the Argentine government issued Decree No. 677/01 (Decree 677) which, among other things, allowed listed companies to opt out of the rules mandating tender offers upon the
occurrence of a change of control of a public company. According to Decree 677, any person or entity that directly or indirectly acquired a certain percentage of the voting shares of a public company with the intention of obtaining control was
required to publicly offer to purchase all of the targets outstanding shares. However, under Decree 677 listed companies were allowed to opt out of the mandatory tender offer requirement, provided that they did so expressly in
their bylaws. We, with the approval of our shareholders, opted out of the mandatory tender offer requirement. Prospective acquirors could, nevertheless, voluntarily launch an offer for all of our shares.

In 2012, the Argentine government enacted the Capital Markets Law, which was regulated in 2013 by Resolution No. 622/2013
of the CNV. The new rules establish a general mandatory tender offer system applicable to all listed companies, with no possibility to opt out. To the extent that the application of this new rule to companies that had opted out of the tender offer
requirement under the previous regime is not clear as of the filing date of this Annual Report, PESA cannot assess the outcome of potential future claims by any of our shareholders arising out of a change of control consummated in accordance with
rights acquired under the previous regime.

MATERIAL CONTRACTS

We are party to a number of material financing agreements, including the underlying agreements for the companys
Global Bond Program, and letters of credit entered into to backstop certain financial commitments under the Ship or Pay contract with OCP. These agreements and other financing agreements are briefly described under Item 5. Operating and
Financial Review and ProspectsOff-Balance Sheet Transactions, Item 5. Operating and Financial Review and ProspectsLiquidity and Capital ResourcesFinancing activities and Item 5. Operating and Financial
Review and ProspectsLiquidity and Capital Resources Description of Indebtedness.

On
September 12, 2012, PESA appointed J.P. Morgan Chase Bank N.A. as depositary for the Companys ADR program. The program was transferred from Citibank, N.A. to J.P. Morgan Chase Bank N.A. on September 13, 2012 and the contract has a duration of
five years.

On July 13, 2012, in connection with the restructuring of CIESAs indebtedness, CIESA, Grupo
Pampa and PESA entered into (i) a settlement agreement and (ii) a fifth amendment to the CIESA Restructuring Agreement. See Item 4. Information on the CompanyGas and EnergyGas TransportationTGSOur Interest in
TGS and Corporate Developments, Item 5. Operating and Financial Review and ProspectsFactors affecting our consolidated results of operationsRegulation of the Energy Industry in ArgentinaCIESAs Debt
Restructuring and Exhibits 4.3 and 4.4 to this Annual Report.

Our agreements with related parties are
described in Related Party Transactions under Item 7.



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EXCHANGE CONTROLS

For more information on exchange controls imposed by the Argentine government, see Item 3. Key
InformationExchange Rates, Item 3. Key InformationExchange Controls and Item 5. Operating and Financial Review and ProspectsDescription of Indebtedness.

TAXATION

The discussion in this section, Taxation, describes tax matters relating to the acquisition, ownership and disposition of our Class B shares and ADSs, pursuant to the Deposit Agreement entered
into with JPMorgan Chase Bank, N.A. (previously Citibank, N.A.) as depositary.

There is at present no income
tax treaty between Argentina and the United States.

Argentine Taxes

General

This discussion describes the principal Argentine tax consequences of the acquisition, ownership and disposition of our Class B shares or ADSs, but it does not purport to be a comprehensive description of
all of the Argentine tax considerations that may be relevant to your decision to acquire our Class B shares or ADSs.

The discussion is based upon Argentine tax laws, regulations and administrative and judicial interpretations in effect as of the date of this Annual Report and subject to change with possible retroactive
effect. In addition, this summary is based in part on representations of the depositary and assumes that each obligation provided for in, or otherwise contemplated by, the Deposit Agreement for our ADSs or any related document will be performed in
accordance with its terms. Prospective purchasers of Class B shares or ADSs should consult their own tax advisors as to the Argentine or other tax consequences of the acquisition, ownership and disposition of our Class B shares or ADSs in their
particular circumstances.

Income Tax

Recent modifications to the Income Tax Law

On
September 23, 2013, the Argentine government enacted Law No. 26,893 (regulated by Regulatory Decree 2,334/2013) introducing modifications to the income tax regime, specifically related to the taxability of the income originating from the
purchase and sale of shares and the collection of dividends.

Capital gains

Sales or other dispositions of shares, quotas, equity interests, certificates, bonds and other securities of Argentine
issuers by non-residents of Argentina will be subject to income tax at a rate of 15% of the net gain derived from such transactions. The net gain is presumed to be 90% of the gross sale price, which equates to an effective tax rate of 13,5% of the
gross sale price. Alternatively, Argentine law allows non-residents of Argentina to calculate the net gain by deducting from the sale price certain costs allowed under Argentine tax regulations, however, procedures for exercising this alternative
option have not yet been determined. In the event both the seller and the buyer are non-residents of Argentina, Argentine law requires that the buyer pay the income tax resulting from such sale to the Argentine tax authorities, however, there are no
regulations providing for procedures with respect to the payment of the capital gains tax under these circumstances.

Capital gains of legal entities domiciled in Argentina resulting from the sale or other disposition of our Class B shares or ADSs will be subject to income tax at a 35% rate. Certain investment funds and
foundations are not subject to income tax.

Sales or other dispositions of shares, quotas, equity interests,
certificates, bonds and other securities by Argentine individuals residents or undivided estates located in Argentina that are executed through exchange markets duly authorized by the Argentine Securities and Exchange Commission (CNV) are exempt
from income tax.



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With respect to income tax applicable to sales abroad by foreign residents,
the tax rate may be reduced under the provisions of tax treaties between Argentina and the country of residence.

As noted above, several aspects of Law No. 26,893 are unclear and there is currently no administrative or judicial interpretation of the law. Holders are encouraged to consult a tax advisor as to the
particular Argentine income tax consequences of holding and disposing of ADSs or Class B shares.

Dividends

Dividends paid on our Class B shares or ADSs in excess of the Companys taxable accumulated income for the previous
fiscal period, whether in cash, property or other equity securities, and any other payment in kind, are subject to income tax withholding at the rate of 35% in respect of such excess (Equalization Tax). This is a final tax and it
is not applicable if dividends are paid in shares (acciones liberadas).

In addition, dividends paid by
us to our Argentine individual shareholders and undivided estates as well as to our foreign shareholders are subject to tax at a 10% rate. The 10% tax rate is calculated over the net dividend after giving effect to the Equalization Tax.

With respect to dividends paid to shareholders residing abroad, such withholding may be reduced by a tax treaty between
Argentina and their country of residence.

JPMorgan Chase Bank, N.A. is our paying agent in the United States.
See Item 8. Financial InformationDividends and Item 9. Offering and Listing.

Capital
reductions and other distributions

Capital reductions and redemptions of our Class B shares and ADSs are
not subject to income tax up to an amount equivalent to the contributed capital corresponding to the Class B shares and ADSs to be redeemed. Any distribution exceeding this amount, however, will be considered as a dividend for tax purposes and
subject to withholding tax at the rate of 35% (plus an additional 10%, if applicable, as described above).

Personal
property tax

Corporations, partnerships, establishments, financial trusts and other legal entities
domiciled or located in Argentina are not subject to the personal property tax.

Shareholdings or interests in
corporations incorporated in Argentina that are held by individuals or undivided estates domiciled or located in Argentina or abroad, or by companies or other legal persons located abroad, are subject to the personal property tax. A company is
liable for the personal property tax payable on behalf of its shareholders in respect of their share ownership, except for shareholders residing in countries which have signed a tax treaty with Argentina including an applicable exemption. A company
liable for this tax payment will be entitled to seek reimbursement of the amount paid from the shareholders, by way of withholding or by foreclosing directly on the assets that gave rise to such payment. Consequently, we are liable to pay personal
property tax in respect of our Class B shares and ADSs and we are entitled to seek reimbursement of the amount paid from shareholders. We usually seek these reimbursements through a withholding on dividend payments. The applicable tax rate is 0.50%
on the equity value of the shares, calculated as of December 31 of the year under consideration.

For
purposes of the above paragraph, shareholdings or interests in companies governed by the Argentine Companies Law held by companies or any other kinds of corporations incorporated in other countries are presumed to indirectly belong to individuals
domiciled abroad or to undivided estates located abroad. Contrary evidence is not accepted to rebut this presumption.

Tax
treaties

There is currently no income tax treaty or convention between Argentina and the United States.

Other taxes

There is no inheritance, gift, succession or VAT applicable to the ownership, transfer, exchange or disposition of our Class B shares or ADSs, except for the inheritance tax applicable only to
corporations or individuals with tax domicile in the Province of Buenos Aires and the Province of Entre Ríos (the tax rate ranges between 4% and 22% depending on the relationship and the amount of inheritance).



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There is neither VAT nor gross revenue tax applicable to the ownership,
transfer, exchange or disposition of our Class B shares or ADSs.

Our Class B shares or ADSs owned by legal
entities (corporations, partnerships, certain associations and trusts organized in Argentina and permanent establishments owned by foreign beneficiaries) are exempt from tax on minimum presumed income.

Commissions paid on brokerage transactions for the sale of our Class B shares on the Buenos Aires Stock Exchange are
subject to a VAT at a rate of 21%.

United States Federal Income Taxes

General

The following discussion summarizes the United States federal income tax considerations relevant to the acquisition, ownership and disposition of Class B shares or ADSs by U.S. holders (as defined below).
This discussion is based on the United States Internal Revenue Code of 1986, as amended (the Code), Treasury regulations promulgated or proposed under the Code, published rulings, and administrative and judicial interpretations of the
Code and the Treasury regulations, all as of the date hereof, and all of which are subject to change (possibly with retroactive effect) and to differing interpretations. This summary is based in part on representations of the depositary and assumes
that each obligation provided for in or otherwise contemplated by the Deposit Agreement for our ADSs or any related document will be performed in accordance with its terms. This discussion is addressed only to U.S. holders and does not address any
United States federal income tax considerations that might be relevant to persons other than U.S. holders. Further, this discussion deals only with U.S. holders that hold ADSs as capital assets (generally, property held for investment) within the
meaning of Section 1221 of the Code, and does not address the tax treatment of holders that may be subject to special tax rules, such as banks, insurance companies, tax-exempt organizations, financial institutions, brokers or dealers in
securities or currencies, traders in securities or currencies that elect mark-to-market treatment, persons that hold the ADSs as part of a hedge, straddle, conversion transaction or other integrated investment, persons that
hold Class B shares or ADSs through a partnership or other pass-through entity, U.S. holders who have a functional currency other than the U.S. dollar or U.S. holders that own or are treated as owning 10% or more of the voting power of
our shares.

This discussion does not describe all aspects of United States federal income taxation that may
be relevant to a particular investor in light of such investors particular circumstances. U.S. holders should consult their own tax advisors as to the specific tax consequences of the acquisition, ownership and disposition of our Class B
shares or ADSs, including the application and effect of United States federal, state, local, foreign and other tax laws and the possible effects of changes in United States federal or other tax laws.

In general, for United States federal income tax purposes, if you hold our ADSs, you will be treated as the beneficial
owner of our Class B shares represented by those ADSs. For purposes of this discussion, you are a U.S. holder if you are a beneficial owner of our Class B shares and you are, for United States federal income tax purposes, (a) an individual who
is a citizen or resident of the United States, (b) a corporation (or other business entity treated as a corporation) created or organized in or under the laws of the United States or of any state or the District of Columbia, or
(c) otherwise subject to United States federal income taxation on a net income basis with respect to the ADSs or the Class B shares.

The U.S. federal income tax consequences of a partner in a partnership holding our Class B shares or ADSs generally will depend on the status of the partner and the activities of the partnership. Partners
in such a partnership should consult with their own tax advisors.

Taxation of our ADSs

Distributions

Distributions we make on our Class B shares or ADSs will be treated as taxable dividends to you to the extent of our current and accumulated earnings and profits as determined under United States federal
income tax principles. A dividend, generally, will be included in the gross income of a U.S. holder when the dividend is actually or constructively received by the depositary. Such dividends will not be eligible for the dividends-received deduction
generally allowed to U.S. corporations in respect of dividends received from other U.S. corporations.



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Subject to certain exceptions for short-term and hedged positions, the U.S.
dollar amount of dividends received by an individual U.S. holder with respect to the ADSs will generally be subject to taxation at preferential rates if the dividends are qualified dividends. Dividends paid on the ADSs will be treated as
qualified dividends if (1) the ADSs are readily tradable on an established securities market in the United States and (2) we were not, in the year prior to the year in which the dividend was paid, and are not, in the year in which the
dividend is paid, a passive foreign investment company (a PFIC). The ADSs are listed on the New York Stock Exchange, and will qualify as readily tradable on an established securities market in the United States so long as they are
so listed. Based on our audited consolidated financial statements and relevant market and shareholder data, we believe that we were not treated as a PFIC for United States federal income tax purposes with respect to our 2012 or 2013 taxable year. In
addition, based on our audited consolidated financial statements and our current expectations regarding the value and nature of our assets, the sources and nature of our income, and relevant market and shareholder data, we do not anticipate becoming
a PFIC for our 2014 taxable year.

Based on existing guidance, it is not entirely clear whether dividends
received with respect to the Class B shares will be treated as qualified dividends, because the Class B shares are not themselves listed on a U.S. exchange. In addition, the U.S. Treasury has announced its intention to promulgate rules pursuant to
which U.S. holders of ADSs or common stock and intermediaries through whom such securities are held will be permitted to rely on certifications from issuers to establish that dividends are treated as qualified dividends. Because such procedures have
not yet been issued, it is not clear whether we will be able to comply with them. U.S. holders of Class B shares or ADSs should consult their own tax advisors regarding the availability of the reduced dividend tax rate in the light of their own
particular circumstances.

The amount of dividend income taxable to you generally will include the amount of
Argentine taxes, if any, that we withhold (as described under Argentine Taxes). Thus, in the event such withholding taxes are imposed, you most likely will be required to report income in an amount greater than the cash you receive
in respect of payments made in respect of the ADSs. Subject to various limitations, you may be eligible to claim the Argentine income tax withheld in connection with any distribution on ADSs as a credit or deduction for purposes of computing your
United States federal income tax liability. Foreign tax credits will not be allowed for withholding taxes imposed with regard to certain short-term or hedged positions in securities and may not be allowed with
regard to arrangements in which a U.S. holders expected economic profit is insubstantial. Dividends we pay in respect of our ADSs generally will be treated as foreign source income and generally will constitute passive income for
foreign tax credit purposes. Special rules will apply to the calculation of foreign tax credits in respect of dividend income that is subject to preferential rates of United States federal income tax. U.S. holders should consult with their own tax
advisors with regard to the availability of foreign tax credits and the application of the foreign tax credit limitations in light of their particular situation.

If a dividend is paid in pesos, the amount you must include in gross income will be the U.S. dollar value of the
distributed pesos, as determined on the date of receipt by the depositary, regardless of whether the payment is in fact converted into U.S. dollars at that time. You will have a tax basis in such pesos for United States federal income tax purposes
equal to the U.S. dollar value on the date of such receipt. Any subsequent gain or loss in respect of such pesos arising from exchange rate fluctuations will be ordinary income or loss and will be treated as income from U.S. sources for foreign tax
credit purposes.

It is unlikely that you will be able to claim a foreign tax credit for any Argentine
personal property tax (as described in Argentine Taxes), but you may be able to deduct such tax in computing your United States federal income tax liability, subject to applicable limitations.

Sale, exchange or other disposition

Deposits and withdrawals of our Class B shares by U.S. holders in exchange for our Class B shares or ADSs will not result
in the realization of gain or loss for United States federal income tax purposes.

Upon a sale, exchange or
other disposition of our Class B shares or ADSs, a U.S. holder generally will recognize capital gain or loss equal to the difference between the amount realized on such disposition (which, in the event of a redemption, will include any amount
withheld by us in respect of Argentine taxes imposed on such redemption) and the U.S. holders adjusted tax basis in our



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Class B shares or ADSs (which, generally, is the U.S. dollar cost thereof). Any gain that you recognize generally will be treated as U.S. source income for United States foreign tax credit
purposes. Consequently, if foreign income or withholding tax is imposed on such gain, you will not be able to use any corresponding tax credit unless you have other foreign source income of the appropriate type in respect of which the credit may be
used. Long-term capital gains recognized by an individual holder are generally taxable at preferential rates. Capital losses may be deducted from the U.S. holders taxable income, subject to limitations.

Backup withholding

The information reporting requirements of the Code generally will apply to distributions on, as well as to proceeds from the sale or exchange of our Class B shares or ADSs. Subject to certain exceptions,
backup withholding may apply to payments of dividends on our Class B shares or ADSs and to payments of the proceeds of a sale or exchange of the Class B shares or ADSs that are made to a non-corporate U.S. holder if such holder fails to
provide a correct taxpayer identification number or otherwise comply with applicable requirements of the backup withholding rules. The backup withholding tax is not an additional tax and may be credited against a U.S. holders United States
federal income tax liability, provided that correct information is provided to the Internal Revenue Service. U.S. holders should consult their own tax advisors regarding their qualification for exemption from backup withholding and the procedure for
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DOCUMENTS ON DISPLAY

We file reports, including annual reports on Form 20-F, and other information with the SEC pursuant to the rules and
regulations of the SEC that apply to foreign private issuers. You may read and copy any materials filed with the SEC at its public reference rooms in Washington, D.C., at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at
1-800-SEC-0330 for further information on the public reference room. Foreign private issuers, like PESA, have been required to make filings with the SEC by electronic means since November 4, 2002. Any filings we make electronically are
available to the public over the Internet at the SECs web site at http://www.sec.gov.



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Item 11. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our results of operations and financial condition are exposed to market risk from three principal areas:
(1) commodity price risk, (2) foreign currency exchange rate risk and (3) interest rate risk. We periodically review the risks associated with our businesses at a senior management level, based on an approach that has evolved from an
independent analysis of each business unit to a risk management strategy that focuses on measuring and monitoring the risks that affect our overall portfolio of assets. We believe our risk management strategy, which is consistent with our business
integration strategy, allows for efficient growth in the vertical integration of our business, while balancing market risks in the business value chain.

For further information on our market risks, please see Note 4 to our Audited Consolidated Financial Statements.

Item 12. DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES

A- Not applicable.

B- Not applicable.

C- Not applicable.



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12.D  American Depositary Shares

Fees and Charges Applicable to ADS Holders

Effective
September 13, 2012, JPMorgan Chase Bank, N.A. succeed Citibank, N.A, as the depositary for our ADR program.

The depositary collects its fees for delivery and surrender of ADSs directly from investors depositing shares or surrendering ADSs for the purpose of withdrawal or from intermediaries acting for them. The
depositary also collects fees for making distributions to investors, by deducting those fees from amounts being distributed or by selling a portion of the distributable property to pay the fees. The depositary may generally refuse to provide
fee-attracting services until its fees for those services are paid.

Holders of ADSs and persons depositing or
withdrawing shares or ADSs, or persons to whom distributions are made, must pay:



|                                                                 |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|---------------------------------------------------------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Rate:                                                            |  | For:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                                 | 
|Up to U.S.$5.00 per 100 ADSs (or portion thereof)                |  | Issuance of ADSs, including issuances against deposit of shares, issuances in respect of share distributions, rights and other
distributions, issuances pursuant to a stock dividend or stock split declared by the Company, or issuances pursuant to a merger, exchange of securities or any other transaction or event affecting the ADSs or the deposited securities.
 Surrender of ADSs for the purpose of withdrawal of deposited securities or
cancellation or reduction of ADSs for any other reason.
|                                                                 | 
|U.S.$0.05 or less per ADS                                        |  | Any cash distribution.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                 | 
|U.S.$1.50 per ADR or ADRs                                        |  | Transfers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                                 | 
|U.S.$0.05 or less per ADS per calendar year (or portion thereof) |  | Services performed by the depositary in administering the ADRs.                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                                                 | 
|Registration fees                                                |  | Registration of transfer of deposited securities on any applicable register in connection with the deposit or withdrawal of deposited securities.                                                                                                                                                                                                                                                                                                                                                           
|                                                                 | 
|Expenses of the depositary                                       |  | Cable, telex and facsimile transmission and delivery charges incurred at the request of persons depositing, or holders delivering
shares, ADRs or deposited securities.  Conversion of foreign currency into
U.S. dollars.                                                                                                                                                                                                                                                                                  
|                                                                 | 
|Taxes and other governmental charges                             |  | As necessary.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Fees and Direct and Indirect Payments Made by the Depositary to the Company

Past Fees and Payments

During 2013, the Company received from the depositary a reimbursement of U.S.$264,754.

Future Fees and Payments

The depositary may
reimburse the Company for certain expenses incurred by the Company in respect of the ADR program established pursuant to the Deposit Agreement upon such terms and conditions as the Company and the depositary have agreed and as may be further agreed
upon from time to time. The Company shall pay to the depositary such fees and charges and reimburse the depositary for such reasonable out-of-pocket expenses as the depositary and the Company may agree from time to time.



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Item 13. DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES

Not applicable.

Item 14. MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS

Not applicable.

Item 15. CONTROLS AND PROCEDURES

(a) Disclosure Controls and Procedures

We carried out an
evaluation under the supervision and with the participation of our management, including our chief executive officer and chief financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined
under Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act), as of December 31, 2013. There are inherent limitations to the effectiveness of any system of disclosure controls and
procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control
objectives. Based upon this evaluation, our chief executive officer and chief financial officer concluded that our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed by us in
the reports that they file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including
our chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure.

(b) Managements Annual Report on Internal Control over Financial Reporting

The Companys management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. The
Companys internal controls is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted
accounting principles.

All internal control systems, no matter how well designed, have inherent limitations.
Therefore, even those systems determined to be effective may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes
in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

The
Companys management assessed the effectiveness of the Companys internal controls over financial reporting as of December 31, 2013. In making this assessment, management used the criteria established in Internal
ControlIntegrated Framework (1992) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on its evaluations and those criteria, management has concluded that the Companys internal
control over financial reporting was effective as of December 31, 2013.

(c) Attestation Report of the Registered
Public Accounting Firm

Price Waterhouse & Co. S.R.L., Buenos Aires, Argentina, a member firm of
PricewaterhouseCoopers, an independent registered public accounting firm, has audited our effectiveness of internal controls over financial reporting as of December 31, 2013. The report on the audit of our internal controls over financial
reporting is included in our audited consolidated financial statements, together with PwCs report on the consolidated financial statements as of December 31, 2013, on pages F-2 through F-3.

(d) Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting as defined in Rule 13a-15(f) under the
Exchange Act during the period covered by this Annual Report on Form 20-F that have materially affected or are reasonable likely to materially affect our internal control over financial reporting. Additionally, there have been no changes in our
internal controls over financial reporting or other factors that have occurred subsequent to the balance sheet date and through the date of this Annual Report that might materially and adversely affect our internal controls over financial reporting
as of December 31, 2013.



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Item 16A. AUDIT COMMITTEE FINANCIAL EXPERT

Our Board of Directors has determined that Cedric Bridger is an audit committee financial expert, and that
Mr. Bridger is independent, within the meaning of this Item 16A. See Item 6. Directors, Senior Management and Employees  Audit Committee.

Item 16B. CODE OF ETHICS

We have adopted a code of ethics, as defined in Item 16B of Form 20-F. Our code of ethics applies to our chief executive officer and our chief financial officer, as well as to other executive
officers and employees. Our code of ethics is available on our web site at http://www.petrobras.com.ar, in the section Corporate Governance, inside the section entitled Investor Center.

Item 16C. PRINCIPAL ACCOUNTANT FEES AND SERVICES

Audit and Non-Audit Fees

Fees for professional services
provided to us by our independent auditors during the fiscal years ended December 31, 2013 and 2012 in each of the following categories are discussed below:

The following table summarizes the fees for professional services provided to PESA, on a consolidated basis:



|                   |  |                         |     |  |      |  |     | 
|------------------ |  | ----------------------- | --- |  | ---- |  | --- | 
|                   |  | Year ended December 31, |    
|                   |  | 2013                    |     |  | 2012 | 
|                   |  | (in millions of pesos)  |    
|Audit fees         |  |                         | 9.2 |  |      |  | 8.4 | 
|Audit-related fees |  |                         |    |  |      |  |    | 
|Tax fees           |  |                         |    |  |      |  |    | 
|                   |  |                         |     |  |      |  |     | 
|Total fees         |  |                         | 9.2 |  |      |  | 8.4 | 
|                   |  |                         |     |  |      |  |     | 

Audit fees. Audit fees in the above table are mainly for professional services
rendered in connection with the audit of our consolidated annual financial statements and the review of our quarterly reports and statutory audits of the financial statements of certain of our subsidiaries.

Independent Auditors. For the year ended December 31, 2013 and 2012, Price Waterhouse & Co. S.R.L.,
a member firm of PricewaterhouseCoopers, served as our independent auditors and audited our financial statements.

The shareholders meeting of PESA held on March 27, 2014 designated Price Waterhouse & Co. S.R.L., a member firm of PricewaterhouseCoopers, as PESAs independent auditors for the
year ending December 31, 2014.

Audit Committee Pre-Approval Policies and Procedures

Our Audit Committee must pre-approve all services provided by the external auditors to ensure the auditors
independence and compliance with all applicable legal restrictions. Pre-approval is either general or specific in nature. All services that are predictable and recurrent in nature and can be performed in a reasonably foreseeable time frame and at a
cost that can be reasonably estimated may be approved by the Audit Committee in a general fashion on an annual basis. Services to be pre-approved on a general basis must be described in sufficient detail so that their scope is readily apparent. This
description must also include an estimate of the fees payable for such services. Specific pre-approval is required for any services not subject to general pre-approval and/or exceeding the estimated cost of those services. Detailed, written
descriptions of any proposed services must be delivered to the administrative manager, who will determine whether such services have already been pre-approved and bring to the Audit Committees attention those services that have not been
pre-approved. Any doubts as to the scope of a pre-approved service must be resolved exclusively by the Audit Committee. Prior to Audit Committee meetings and at least three times a year, the administrative manager must provide a report on all
services provided by the external auditor and related fees to the Audit Committee. The Audit Committee is also required to periodically discuss with the external auditors the services they provide to us and our associates and subsidiaries and the
compensation they receive for those services.



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All services performed by the independent auditor during 2013 were approved
by the Audit Committee in accordance with this policy and the aforementioned procedures. This approval applied to the audit of all of our subsidiaries.

Item 16D. EXEMPTION FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES

Not applicable.

Item 16E. PURCHASES OF EQUITY SECURITIES BY
THE ISSUER AND AFFILIATED PURCHASERS

From January 1, 2013 to December 31, 2013, no purchases of
our ordinary shares or ADSs were made by us or on our behalf or by any affiliated purchaser.

On
December 31, 2009, the account of Treasury Shares related to 3,385,947 Company shares resulting from the exchange of 9,431,210 Class B shares of PEPSA held by the Company.

During 2010, pursuant to the conditions provided of Section No. 220 of the Argentine Companies Law, the Company sold
these treasury shares under the preemptive right provisions set forth in Sections 221 and 194 of the Argentine Companies Law, and subsequently transferred to Optimum Petrobras Trust the remaining 3,277,418 treasury shares of the Company.

The Company, in its capacity as trustor, entered into a trust agreement with BNP Paribas Argentina Investment Partners
S.A., in its capacity as trustee. The trust assets consist of shares of the Company which as of December 31, 2013 numbered 5,744,303. The sole purpose of the trust is to make periodical contributions of shares and/or funds resulting from the
sale of the shares for the Company to comply with the funding obligations under its Compensatory Fund and the Employees Supplementary Pension Plan.

Item 16F. CHANGE IN REGISTRANTS CERTIFYING ACCOUNTANT

Not applicable.

Item 16G. CORPORATE GOVERNANCE

Companies listed on the NYSE must comply with certain standards regarding corporate governance as codified in
Section 303A of the NYSEs Listed Company Manual, as amended. Nevertheless, the Company, while a listed company, also qualifies as a foreign private issuer and, as such, is permitted to follow its home country corporate governance
practices, governed by the Argentine Companies Law, Capital Market Law No. 26,381 and the Standards of the CNV, in lieu of the provisions of Section 303A, except that it is required to comply with Sections 303A.06, 303A.11 and 303A.12(b)
and (c).

Accordingly:

(i) we must satisfy the audit committee requirements of Rule 10A-3 under the Exchange Act (Rule 10A-3) (Section 303A.06);

(ii) we must provide a brief description of
any significant differences between our corporate governance practices and those followed by U.S. companies under NYSE listing standards (Section 303A.11); and

(iii) (a) our chief executive officer (as of the date hereof, Mr. Ronaldo Batista Assunção) must promptly notify the NYSE in writing after any executive officer of the Company
becomes aware of any non-compliance with the applicable NYSE corporate governance rules (Section 303A.12(b)); and (b) we must submit an executed written affirmation (in relation to the members of our audit committee) annually, or interim
written affirmations, if required, to the NYSE (Section 303A.12(c)).

As required by the NYSE and
Item 16G of Form 20-F, the table below discloses the significant differences between our corporate governance practices and the NYSE rules. Our corporate governance practices are described in further detail elsewhere in this Annual Report. See
Item 6. Directors, Senior Management and Employees and Item 10. Additional InformationMemorandum and Articles of Association.



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|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|----------------------------------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Section of
the NYSE Listed
Company Manual |  | New York Stock Exchange Corporate Governance
Rules for Domestic Issuers                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |  | Our Practices                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|303A.01                                   |  | Independent Directors                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                          |  | Listed companies must have a majority of independent directors on their board of directors. Controlled companies, which would include our company if
it were a U.S. issuer, need not comply with this requirement. A controlled company is one in which more than 50% of the voting power is held by an individual, a group or another company, rather than the public.                                                                                                                                                                   |  | Argentine law does not require us to have a majority of independent board members. Only the majority of the directors on the Audit Committee must be
independent.                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|303A.02                                   |  | Independence Tests                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                          |  | This section establishes general standards to determine directors independence.
 (a) No director qualifies as independent
unless the board of directors affirmatively determines that the director has no material relationship with the listed company (either directly or as a partner, shareholder or officer of an organization that has a relationship with the company). The
board of directors is also required to identify which directors are independent and disclose the basis for that determination.                        |  | At our annual shareholders meeting, our shareholders determine in accordance with Resolution No. 622/13 of the CNV
and Capital Market Law No. 26,381 whether or not each of our directors is independent based on the following criteria. Pursuant to the above mentioned resolution, a director is not independent if such director is:
 (1) a member of management or an employee of
shareholders who hold significant interests in the issuer, or of other entities in which these shareholders hold either directly or indirectly significant interests, or over which these shareholders exercise a significant
influence;
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                          |  | (b) In addition, a director is not independent if:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                          |  | (i) the director is, or has been within the last three years, an employee, or an immediate family member is, or has been within the last three years, an
executive officer, of the listed company, its parent or a consolidated subsidiary, other than employment as interim chairman or chief executive officer or other executive officer;                                                                                                                                                                                                |  | (2) an employee of the issuer or was an employee of the issuer in the last three years;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                          |  | (ii) the director has received, or has an immediate family member who has received, during any 12-month period within the
last three years, more than U.S.$120,000 in direct compensation from the listed company, its parent or a consolidated subsidiary, other than director and committee fees and pension or other forms of deferred compensation for prior services (provided
such compensation is not contingent in any way on continued service);                                                                                   |  | (3) a person who has professional relations with or is part of a company or professional association that maintains professional relations with, or that receives
remunerations or fees (other than directors fees) from, the issuers or from its shareholders that hold either directly or indirectly significant interests in or exercise a significant influence over the issuer, or in which such shareholders
hold either directly or indirectly significant interests or over which they exercise a significant influence;                                                                                               
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                          |  | (iii) (A) the director is a current partner or employee of a firm that is the listed companys internal or external auditor; (B) the director has an
immediate family member who is a current partner of such firm; (C) the director has an immediate family member who is a current employee of such firm and personally works on the companys audit; or (D) the Director or an immediate family member
was within the last three years a partner or employee of such firm and personally worked on the companys audit within that time; |  | (4) a person who is either directly or indirectly a holder of significant interests in the issuer or in an entity that has significant interests in or exercises
a significant influence over the issuer;                                                                                                                                                                                                                                                                                                                                                                                                                       



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|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                           |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|----------------------------------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Section of
the NYSE Listed
Company Manual |  | New York Stock Exchange Corporate Governance
Rules for Domestic Issuers                                                                                                                                                                                                                                                                                                                                                   |  | Our Practices                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                          |  | (iv) the director or an immediate family member is, or has been with the last three years, employed as an executive officer of another company where any of the
listed companys present executive officers at the same time serves or served on that companys compensation committee;                                                                                                                                   |  | (5) the member is married or is a family member, up to fourth degree by blood or up to second degree by affinity, to an individual who would not qualify as
independent; and                                                                                                                                                                                                                                                                                                                                           
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                          |  | (v) the director is a current employee, or an immediate family member is a current executive officer, of a company that has made payments to, or received
payments from, the listed company, its parent or a consolidated subsidiary for property or services in an amount which, in any of the last three fiscal years, exceeds the greater of U.S.$1 million or 2% of such other companys consolidated
gross revenues. |  | (6) a person who sells or provides either directly or indirectly goods or services to the issuer or to shareholders that hold either directly or indirectly
significant interests in or exercise a significant influence over the issuer, and receives compensation for such services that is substantially higher than that payable to a director.                                                                                                                                                                    
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                           |  | Significant interests shall mean shareholdings that represent at least 35% of the capital stock of the relevant entity, or a smaller percentage when
the person has the right to elect one or more directors by class of shares or by having entered into shareholders, agreements relating to the governance and management of the relevant entity or of its controlling shareholders.                                                                                                                              
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                          |  | There is a three-year look-back period before non-independent directors can be considered
independent.  Immediate family
member includes a persons spouse, parents, children, siblings, mothers and fathers-in-law, sons and daughters-in-law, and anyone (other than domestic employees) who share such persons home.                                                                                              |  | Cedric Bridger, Roberto Luis Monti, Carlos Ariel Lieutier, Alejandro Poletto and David René Jacoby are currently members of our Board of Directors who
qualify as independent directors pursuant to the factors listed above.                                                                                                                                                                                                                                                                                          
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                          
|303A.03                                   |  | Executive Sessions                                                                                                                                                                                                                                                                                                                                                                                                        |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                          |  | The non-management directors of each listed company must meet at regularly scheduled executive sessions without management.                                                                                                                                                                                                                                                                                               |  | Under Argentine Law, a board of directors must meet at least once every three months.
 Ronaldo Batista Assunção and Luis Miguel
Sas, in addition to serving on the Board of Directors, have management positions. Our other seven directors are non-managing directors. The non-managing directors do not meet at regularly scheduled executive sessions without the presence of the
managerial directors. See Item 6. Directors, Senior Management and EmployeesDirectors and Senior ManagementBoard of Directors.
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                          
|303A.04                                   |  | Nominating/Corporate Governance Committee                                                                                                                                                                                                                                                                                                                                                                                 |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                          |  | Listed companies must have a nominating/corporate governance committee composed entirely of independent directors, with a written charter that covers the
committees purpose and responsibilities and an annual performance evaluation of the committee.                                                                                                                                                                 |  | Argentine law does not require the establishment of a nominating committee or a corporate governance committee. We do not have either of these committees.
Instead, their functions are carried out by the Compensation Committee or by the Board of Directors, with the assistance of the Executive Management of Legal Affairs, the Management of Human Resources and the General
Secretary.                                                                                                                         



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|----------------------------------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Section of
the NYSE Listed
Company Manual |  | New York Stock Exchange Corporate Governance
Rules for Domestic Issuers                                                                                                                                                                                                                                                                                                                                                                                      |  | Our Practices                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|303A.05                                   |  | Compensation Committee                                                                                                                                                                                                                                                                                                                                                                                                                                       |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                          |  | Listed companies must have a compensation committee composed entirely of independent directors, with a written charter that covers the committees purpose
and responsibilities and an annual performance evaluation.                                                                                                                                                                                                                                        |  | Argentine regulations do not require the establishment of a compensation committee.
 However, at its October 6, 2006 meeting, in order to
better supervise salary and compensation matters, our Board of Directors created a Compensation Committee, whose purpose is to assure the compliance with and revise, whenever necessary, policies relating to compensation that aim to provide the
Company with greater flexibility to make more effective decisions. The Committee meets to approve matters relating to compensation policy, including variable compensation practices. The Committee, composed by Roberto Luis Monti, Luiz Gustavo Primo
de Siqueira and Ronaldo Batista Assunção, must report to the Board of Directors at least semiannually.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|303A.06
303A.07                           |  | Audit Committee                                                                                                                                                                                                                                                                                                                                                                                                                                              |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                          |  | Listed companies must have an Audit Committee with a minimum of three independent, financially literate members (at
least one member must have accounting or related financial management expertise) that satisfy the independence requirements of Rule 10A-3. 
The Committee must have a written charter that addresses its purpose, annual performance evaluation and duties and
responsibilities.  Listed companies must have
an internal audit function. |  | The Audit Committee is an advisory committee to the Board of Directors. Argentine law requires that the audit committee
be composed of three members from the Board of Directors (with a majority of independent directors), all of whom are well-versed in business, financial or accounting matters. The Audit Committee is composed of three directors, who each satisfy the
independence requirements of Rule 10A-3. One member of our Audit Committee, Mr. Cedric Bridger, qualifies as a financial expert within the meaning of Item 16A of Form 20-F. See Item 16A. Audit Committee Financial
Expert.  Our Audit Committee is
responsible for, among other things: (1) monitoring and evaluating the activities of the internal and external auditors, (2) supervising the process for preparation of our financial statements, (3) ensuring that our financial statements comply with
applicable legal requirements, (4) providing the market with complete information with respect to transactions where members of corporate bodies or controlling shareholders of ours have conflicts of interest, and (5) opining on the reasonableness of
compensatory plans for directors and managers. See Item 6. Directors, Senior Management and EmployeesBoard PracticesAudit Committee. 
Under Argentine law, the shareholders must appoint the external auditor. The Board of Directors may present a proposal regarding the
appointment of the external auditor to the shareholders meeting. The Audit Committee must issue an opinion on any such proposal presented to the shareholders.
 We also have an internal audit
department.



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|                                          |  |                                                                                                                                                                                                                                                                                                               |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|----------------------------------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Section of
the NYSE Listed
Company Manual |  | New York Stock Exchange Corporate Governance
Rules for Domestic Issuers                                                                                                                                                                                                                                       |  | Our Practices                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                          |  |                                                                                                                                                                                                                                                                                                               |  | In accordance with Argentine law, we also have established a Statutory Supervisory Committee that is comprised of three members and three alternate members,
approved by our shareholders. Members of the Statutory Supervisory Committee are not members of our Board of Directors. The primary responsibilities of the Statutory Supervisory Committee are to monitor the Board of Directors and
managements compliance with the Argentine Companies Law, our bylaws and our shareholders resolutions. The Statutory Supervisory Committee also performs other functions, including: (1) attending meetings of the Board of Directors and
shareholders, (2) calling extraordinary shareholders meetings when deemed necessary or when required by shareholders, in accordance with the Argentine Companies Law, (3) presenting a report on the reports of the Board of Directors and the
annual financial statements at ordinary shareholders meetings, and (4) investigating written complaints of shareholders representing not less than 2% of the capital stock. See Item 6. Directors, Senior Management and EmployeesBoard
PracticesStatutory Supervisory Committee.
|                                          |  |                                                                                                                                                                                                                                                                                                              
|303A.08                                   |  | Shareholder Approval of Equity Compensation Plans                                                                                                                                                                                                                                                             |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                          |  |                                                                                                                                                                                                                                                                                                              
|                                          |  | Shareholders must be given the opportunity to vote on equity compensation plans and material revisions thereto, except for employment inducement awards, certain
grants, plans and amendments in the context of mergers and acquisitions, and certain specific types of plans as set forth in the NYSE rules. |  | Our Board of Directors approves equity compensation plans for our executive officers and senior management. For a description of our stock option programs for
our executive officers and senior management see Item 6. Directors, Senior Management and EmployeesCompensation.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                          |  |                                                                                                                                                                                                                                                                                                              
|                                          |  |                                                                                                                                                                                                                                                                                                               |  | The Audit Committee issues an opinion on the reasonableness of the Board of Directors proposals regarding fees and executive equity compensation
plans.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                          |  |                                                                                                                                                                                                                                                                                                              
|303A.09                                   |  | Corporate Governance Guidelines                                                                                                                                                                                                                                                                               |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                          |  |                                                                                                                                                                                                                                                                                                              
|                                          |  | Listed companies must adopt and disclose corporate governance guidelines.                                                                                                                                                                                                                                     |  | Adoption of corporate governance guidelines is not required by Argentine law, but the CNV requires companies to publicly report annually on their adoption of
certain recommended corporate governance practices. We have nonetheless adopted the practice of issuing corporate governance policies, and public reports on these policies, on an annual basis, as required by the CNV.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                                          |  |                                                                                                                                                                                                                                                                                                              
|303A.10                                   |  | Code of Business Conduct and Ethics                                                                                                                                                                                                                                                                           |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                          |  |                                                                                                                                                                                                                                                                                                              
|                                          |  | Listed companies must adopt and disclose a code of business conduct and ethics for directors, officers and employees, and promptly disclose any waivers of the
code for directors or executive officers.                                                                                                      |  | We have adopted a Code of Conduct and Business Ethics applicable to all employees. See Item 16B. Code of Ethics. Any amendment to the code will be
disclosed on our web site at www.petrobras.com.ar.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              



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|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |  |                                                                                                                                                                                            
|----------------------------------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Section of
the NYSE Listed
Company Manual |  | New York Stock Exchange Corporate Governance
Rules for Domestic Issuers                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  | Our Practices                                                                                                                                                                              
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|303A.12                                   |  | Certification Requirements                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |  |                                                                                                                                                                                            
|                                          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|                                          |  | (a) Each listed company chief executive officer must certify to the NYSE each year that he or she is not aware of any
violation by the company of NYSE corporate governance listing standards, qualifying the certification to the extent necessary. 
(b) Each listed company CEO must promptly notify the NYSE in writing after any executive officer of the listed company becomes aware of
any non-compliance with any applicable provisions of Section 303A of the NYSE Listed Company Manual. 
(c) Each listed company must submit an executed Written Affirmation annually to the NYSE. In addition, each listed company must submit an
interim written affirmation as and when required by the interim written affirmation form specified by the NYSE. |  | Our CEO will promptly notify the NYSE in writing if an executive officer becomes aware of any material non-compliance with any applicable provision of the NYSE
corporate governance rules.

Item 16H. MINE SAFETY DISCLOSURE

Not applicable.



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Item 17. FINANCIAL STATEMENTS

Not applicable.

Item 18. FINANCIAL STATEMENTS

Pages F-1 to F-129 and S-1 to S-12 of this Annual Report are incorporated herein by reference. We have included in this
Annual Report, in addition to our audited consolidated financial statements: (i) the consolidated financial statements of CIESA for the years ended December 31, 2013, 2012 and 2011, together with the notes thereto (the CIESA
Financial Statements), beginning on page F-82 of this Annual Report, because for the year ended December 31, 2012 CIESA was, in reference to PESA, a significant 50 percent or less owned person pursuant to Rule 3-09 of
Regulation S-X; and (ii) unaudited oil and gas supplementary disclosures under ASC Topic 932, beginning on page S-1 of this Annual Report. The CIESA Financial Statements have been prepared in accordance with Argentine GAAP and,
with respect to the financial information of CIESA as of and for the year ended December 31, 2012 only, were audited by PwC, as described in its audit report on the CIESA Financial Statements included on page F-83 of this Annual Report. The
financial information of CIESA as of and for the years ended December 31, 2013 and 2011 in the CIESA Financial Statements has not been audited.

Item 19. EXHIBITS

Pursuant
to the rules and regulations of the SEC, we have filed certain agreements as exhibits to this Annual Report on Form 20-F. These agreements may contain representations and warranties by the parties. These representations and warranties have been made
solely for the benefit of the other party or parties to such agreements and (1) may be intended not as statements of fact, but rather as a way of allocating the risk to one of the parties to such agreements if those statements turn out to be
inaccurate, (2) may have been qualified by disclosures that were made to such other party or parties and that either have been reflected in the companys filings or are not required to be disclosed in those filings, (3) may apply
materiality standards different from what may be viewed as material to investors and (4) were made only as of the date of such agreements or such other date(s) as may be specified in such agreements and are subject to more recent developments.
Accordingly, these representations and warranties may not describe our actual state of affairs at the date hereof.



|        |  |                                                                                                                                                                                                                                                                            |  |                           |  |      |       |  |      |  |         |     |  |  |          |   |  | 
|------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------- |  | ---- | ----- |  | ---- |  | ------- | --- |  |  | -------- | - |  | 
|Exhibit |  |                                                                                                                                                                                                                                                                            |  | Incorporated by Reference |  |      | Filed
|Number  |  | Description                                                                                                                                                                                                                                                                |  | Filer                     |  | Form |       |  | Date |  |         | No. |  |  | Herewith
|1.1     |  | English translation of bylaws (estatutos sociales) of Petrobras Energía S.A.                                                                                                                                                                                               |  | PESA                      |  |      | 20-F  |  |      |  | 6/30/09 |     |  |  | 1.2      |   |  | 
|        |  |                                                                                                                                                                                                                                                                            |  |                           |  |     
|2.1     |  | Form of Deposit Agreement among Petrobras Energía S.A., Citibank, N.A., as depositary, and the Holders and Beneficial Owners of American Depositary Shares evidenced by
American Depositary Receipts issued thereunder, including the form of American Depositary Receipt. |  | PESA                      |  |      | 20-F  |  |      |  | 6/24/10 |     |  |  | 2.1      |   |  | 
|        |  |                                                                                                                                                                                                                                                                            |  |                           |  |     
|2.2     |  | Form of Amended and Restated Deposit Agreement among Petrobras Argentina S.A., JPMorgan Chase Bank, N.A., as depositary, and all holders from time to time of ADRs issued
thereunder, including the Form of American Depositary Receipt.                                   |  | PESA                      |  |      | F-6   |  |      |  | 9/5/12  |     |  |  | (a       | ) |  | 
|        |  |                                                                                                                                                                                                                                                                            |  |                           |  |     
|2.3     |  | Amended and Restated Indenture, dated August 1, 2002, amending and restating the Indenture dated May 1, 1998, between Petrobras Energía S.A. and Citibank,
N.A.                                                                                                            |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/30/03 |     |  |  | 2.11     |   |  | 



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|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |      |       |  |      |  |         |     |  |  |          |  |  |  |   | 
|------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------- |  | ---- | ----- |  | ---- |  | ------- | --- |  |  | -------- |  |  |  | - | 
|Exhibit |  |                                                                                                                                                                                                                                                                                                                             |  | Incorporated by Reference |  |      | Filed | 
|Number  |  | Description                                                                                                                                                                                                                                                                                                                 |  | Filer                     |  | Form |       |  | Date |  |         | No. |  |  | Herewith | 
|4.1     |  | Restructuring Agreement dated as of September 1, 2005 among Compañía de Inversiones de Energía S.A., Petrobras Energía S.A., Petrobras Hispano
Argentina S.A., Enron Pipeline Company Argentina S.A., ABN AMRO BANK N.V. Sucursal Argentina, and the Creditors named therein.                                               |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/29/06 |     |  |  | 4.4      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.2     |  | Third Amendment to the Restructuring Agreement dated as of March 25, 2008 among Compañía de Inversiones de Energía S.A., Petrobras Energía S.A.,
Petrobras Hispano Argentina S.A., Enron Pipeline Company Argentina S.A., ABN AMRO BANK N.V. Sucursal Argentina, and AEI.                                                   |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/27/08 |     |  |  | 4.2      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.3     |  | Fifth Amendment to the Restructuring Agreement dated as of July 13, 2012 among Compañía de Inversiones de Energía S.A., Petrobras Argentina S.A., Petrobras
Hispano Argentina S.A., Pampa Energía S.A., Pampa Inversiones S.A., Inversiones Argentina I, EPCA S.A. and The Royal Bank of Scotland N.V., Sucursal Argentina. |  | PEPSA                     |  |      | 20-F  |  |      |  | 4/29/13 |     |  |  | 4.3      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.4     |  | Settlement Agreement dated July 13, 2012 among Compañía de Inversiones de Energía S.A., Petrobras Argentina
S.A., Petrobras Hispano Argentina S.A., Pampa Energía S.A., Pampa Inversiones S.A. and Inversiones Argentina I.                                                                                                 |  | PEPSA                     |  |      | 20-F  |  |      |  | 4/29/13 |     |  |  | 4.4      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.5     |  | Loan Agreement Number 0088/2005, dated February 21, 2005, between Petrobras Energía S.A., as borrower, and Petrobras International Braspetro B.V., as lender (English
translation).                                                                                                                                         |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/30/05 |     |  |  | 2.16     |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.6     |  | Loan Agreement, dated December 15, 2008, between Petrobras International Braspetro B.V., as borrower, and Petrobras Energía S.A., as lender (English
translation).                                                                                                                                                          |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/30/09 |     |  |  | 4.4      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.7     |  | Loan Agreement, dated December 15, 2008, between Petrobras International Braspetro B.V., as borrower, and Petrobras Holding Austria AG, as lender (English
translation).                                                                                                                                                    |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/30/09 |     |  |  | 4.5      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.8     |  | Stock Purchase Agreement, dated December 21, 2007, between Petrobras Energía, S.A., as seller, and Petrobras International Braspetro B.V., as purchaser.                                                                                                                                                                    |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/27/08 |     |  |  | 4.7      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|4.9     |  | Stock Purchase Agreement, dated April 27, 2009, between Petrobras Energía S.A., as seller, and Petrobras International Braspetro B.V., as purchaser.                                                                                                                                                                        |  | PEPSA                     |  |      | 20-F  |  |      |  | 6/30/09 |     |  |  | 4.7      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|5.0     |  | Share Purchase Agreement, dated May 31, 2012, between Petrobras Participaciones S.L., as Vendor, and Petrobras Argentina S.A., as Purchaser.                                                                                                                                                                                |  | PEPSA                     |  |      | 20-F  |  |      |  | 4/29/13 |     |  |  | 5.0      |  |  |  |   | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|5.1     |  | DeGolyer and MacNaughton reserves report, dated January 15, 2014.                                                                                                                                                                                                                                                           |  |                           |  |      |       |  |      |  |         |     |  |  |          |  |  |  | X | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|8.1     |  | List of Subsidiaries of Petrobras Argentina S.A.                                                                                                                                                                                                                                                                            |  |                           |  |      |       |  |      |  |         |     |  |  |          |  |  |  | X | 
|        |  |                                                                                                                                                                                                                                                                                                                             |  |                           |  |     
|12.1    |  | Petrobras Argentina S.A. CEO Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, dated April 25, 2014.                                                                                                                                                                                                 |  |                           |  |      |       |  |      |  |         |     |  |  |          |  |  |  | X | 



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|     |  |                                                                                                                                       |  |  |  |  |  |  |  |  |  |  |   | 
|---- |  | ------------------------------------------------------------------------------------------------------------------------------------- |  |  |  |  |  |  |  |  |  |  | - | 
|     |  |                                                                                                                                       |  |  |  | 
|12.2 |  | Petrobras Argentina S.A. CFO Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, dated April 25, 2014.           |  |  |  |  |  |  |  |  |  |  | X | 
|     |  |                                                                                                                                       |  |  |  | 
|13.1 |  | Petrobras Argentina S.A. CEO Certification furnished pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, dated April 25, 2014. |  |  |  |  |  |  |  |  |  |  | X | 
|     |  |                                                                                                                                       |  |  |  | 
|13.2 |  | Petrobras Argentina S.A. CFO Certification furnished pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, dated April 25, 2014. |  |  |  |  |  |  |  |  |  |  | X | 

Omitted from exhibits with this Annual Report are certain instruments and agreements with
respect to PESAs long-term debt, none of which authorizes securities in a total amount exceeding 10% of our total assets. We hereby agree to furnish to the SEC a copy of any such omitted instruments or agreements as the SEC requests.



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SIGNATURES

The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it
has duly caused and authorized the undersigned to sign this Annual Report on its behalf.



PETROBRAS ARGENTINA S.A.By:

/s/ Ronaldo Batista AssunçãoName:

Ronaldo Batista AssunçãoTitle:

Chief Executive OfficerBy:

/s/ Luis Miguel SasName: Title:

Luis Miguel Sas Chief Financial Officer


Date: April 25, 2014



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INDEX TO FINANCIAL STATEMENTS

PETROBRAS ARGENTINA S.A.



|                                                                                                                                                                                                               |  |     
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ----
|Report of independent registered public accounting firm on the Consolidated Financial Statements and on Internal Control over Financial Reporting of Petrobras Argentina
S.A. as of December 31, 2013 and 2012 |  | F-2 
|                                                                                                                                                                                                               | 
|Report of independent registered public accounting firm on the Consolidated Financial Statements of Petrobras Argentina S.A. for the year ended December 
31, 2011                                             |  | F-4 
|                                                                                                                                                                                                               | 
|Consolidated statements of income of Petrobras Argentina S.A. for the years ended December 31, 2013, 2012 and 2011                                                                                             |  | F-5 
|                                                                                                                                                                                                               | 
|Consolidated statements of comprehensive income of Petrobras Argentina S.A. for the years ended December 31, 2013, 2012 and 2011                                                                               |  | F-6 
|                                                                                                                                                                                                               | 
|Consolidated statements of financial position of Petrobras Argentina S.A. as of December 31, 2013, 2012 and January 1, 2012                                                                                    |  | F-7 
|                                                                                                                                                                                                               | 
|Consolidated statements of changes in equity of Petrobras Argentina S.A. for the years ended December 31, 2013, 2012 and 2011                                                                                  |  | F-8 
|                                                                                                                                                                                                               | 
|Consolidated statements of cash flows of Petrobras Argentina S.A. for the years ended December 31, 2013, 2012 and 2011                                                                                         |  | F-9 
|                                                                                                                                                                                                               | 
|Notes to the consolidated financial statements of Petrobras Argentina S.A. as of December 31, 2013, 2012 and January 1, 2012 and for the years ended December 31,
 2013, 2012 and 2011                         |  | F-10



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##### Table of Contents

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of Petrobras Argentina S.A.

In our opinion, the accompanying consolidated statements of financial position at December 31, 2013 and 2012 and the related consolidated
statements of income, comprehensive income and changes in equity for the years ended December 31, 2013 and 2012 present fairly, in all material respects, the financial position of Petrobras Argentina S.A. and its subsidiaries at December 31, 2013
and 2012, and the results of its operations and its cash flows for the two years in the period ended December 31, 2013 in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board. Also in
our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2013, based on criteria established in Internal Control - Integrated Framework (1992) issued by the
Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Companys management is responsible for these financial statements, for maintaining effective internal control over financial reporting and for its assessment of the
effectiveness of internal control over financial reporting, included in Managements Annual Report on Internal Control Over Financial Reporting. Our responsibility is to express opinions on these financial statements and on the Companys
internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the
audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial
statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial
statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the
design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for
our opinions.

A companys internal control over financial reporting is a process designed to provide reasonable
assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A companys internal control over financial reporting
includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with
authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the companys assets that could have a material
effect on the financial statements.



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##### Table of Contents

We also have audited the adjustments to the 2011 financial statements to retrospectively
apply the change in accounting for employee benefit plans for the revisions to IAS 19 Employee Benefits as described in Note 2.2.1. In our opinion, such adjustments are appropriate and have been properly applied. We were not engaged to audit,
review, or apply any procedures to the 2011 consolidated financial statements of the Company other than with respect to the adjustments and, accordingly, we do not express an opinion or any other form of assurance on the 2011 consolidated financial
statements taken as a whole.

Because of its inherent limitations, internal control over financial reporting may not prevent
or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or
procedures may deteriorate.

Autonomous City of Buenos Aires, April 25, 2014

PRICE WATERHOUSE & CO. S.R.L.

By: /s/ Miguel A. Urus (Partner)



F-3



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##### Table of Contents

Report of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders of

Petrobras Argentina S.A.

We have audited, before the effects of the adjustments
to retrospectively apply the change in accounting described in Note 2.2.1, the accompanying consolidated statements of income, comprehensive income, changes in equity and cash flows of Petrobras Argentina S.A. and subsidiaries (PESA
or the Company) for the year ended December 31, 2011. The 2011 financial statements before the effects of the adjustments described in Note 2.2.1 are not presented herein. The 2011 consolidated financial statements are the
responsibility of the Companys management. Our responsibility is to express an opinion on these consolidated financial statements based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the consolidated financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the consolidated financial statements, assessing the
accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the 2011 consolidated financial statements, before the effects of the adjustments to retrospectively apply the change in
accounting described in Note 2.2.1, present fairly, in all material respects, the consolidated results of the Companys operations and their cash flows for the year ended December 31, 2011, in conformity with International Financial
Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB).

We were not engaged to audit,
review, or apply any procedures to the adjustments to retrospectively apply the change in accounting described in Note 2.2.1, which include the disclosure of the January 1, 2012 financial position and, accordingly, we do not express an opinion
or any other form of assurance about whether such adjustments are appropriate and have been properly applied. Those adjustments were audited by a successor auditor.

Buenos Aires, Argentina

August 31, 2012

KPMG

Member
firm of KPMG International Cooperative

|    |  |                     
|--- |  | --------------------
|    | 
|By: |  | /s/ Graciela C. Laso
|    |  | Partner             



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##### Table of Contents

CONSOLIDATED STATEMENTS OF INCOME

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(Stated in millions of Argentine pesos)



|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|-------------------------------------------------------- |  | ----- | ---- |  | ---- |  | ------- | ---- |  |  | ------ | - |  |  | ------ | -
|                                                         |  | Notes |      |  | 2013 |  |         | 2012 |  |  | 2011   |  
|                                                         |  |       |      | 
|Continuing operations                                    |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Sales                                                    |  |       |      |  |      |  | 15,340  |      |  |  | 12,765 |   |  |  | 11,104 |  
|Cost of sales                                            |  |       | 6    |  |      |  | (11,260 | )    |  |  | (9,619 | ) |  |  | (8,462 | )
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Gross profit                                             |  |       |      |  |      |  | 4,080   |      |  |  | 3,146  |   |  |  | 2,642  |  
|                                                         |  |       |      | 
|Administrative and selling expenses                      |  |       | 7    |  |      |  | (1,797  | )    |  |  | (1,430 | ) |  |  | (1,222 | )
|Exploration expenses                                     |  |       | 8    |  |      |  | (82     | )    |  |  | (212   | ) |  |  | (391   | )
|Other operating expenses, net                            |  |       | 9    |  |      |  | (571    | )    |  |  | (121   | ) |  |  | (831   | )
|Share of profit of equity accounted investees            |  |       | 13.3 |  |      |  | (279    | )    |  |  | (148   | ) |  |  | (36    | )
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Operating income                                         |  |       |      |  |      |  | 1,351   |      |  |  | 1,235  |   |  |  | 162    |  
|                                                         |  |       |      | 
|Financial results                                        |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Financial income                                         |  |       | 10   |  |      |  | 700     |      |  |  | 442    |   |  |  | 289    |  
|Financial costs                                          |  |       | 10   |  |      |  | (647    | )    |  |  | (512   | ) |  |  | (465   | )
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Income (loss) before income tax                          |  |       |      |  |      |  | 1,404   |      |  |  | 1,165  |   |  |  | (14    | )
|                                                         |  |       |      | 
|Income tax                                               |  |       | 23   |  |      |  | (552    | )    |  |  | (492   | ) |  |  | (15    | )
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Income (loss) from continuing operations                 |  |       |      |  |      |  | 852     |      |  |  | 673    |   |  |  | (29    | )
|                                                         |  |       |      | 
|Discontinued operations                                  |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Income from discontinued operations                      |  |       | 18.2 |  |      |  |        |      |  |  |       |   |  |  | 706    |  
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Net income                                               |  |       |      |  |      |  | 852     |      |  |  | 673    |   |  |  | 677    |  
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|                                                         |  |       |      | 
|Earnings / (losses) per share basic / diluted (in pesos) |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|From continuing operations                               |  |       | 11   |  |      |  | 0.386   |      |  |  | 0.306  |   |  |  | (0.012 | )
|From discontinued operations                             |  |       | 11   |  |      |  |        |      |  |  |       |   |  |  | 0.350  |  
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Total                                                    |  |       |      |  |      |  | 0.386   |      |  |  | 0.306  |   |  |  | 0.337  |  
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|                                                         |  |       |      | 
|Attributable to:                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Shareholders of the Company                              |  |       |      |  |      |  | 779     |      |  |  | 618    |   |  |  | 681    |  
|Non-controlling interest                                 |  |       |      |  |      |  | 73      |      |  |  | 55     |   |  |  | (4     | )
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  
|Total                                                    |  |       |      |  |      |  | 852     |      |  |  | 673    |   |  |  | 677    |  
|                                                         |  |       |      |  |      |  |         |      |  |  |        |   |  |  |        |  



F-5



---

##### Table of Contents

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(Stated in millions of Argentine pesos)



|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|-------------------------------------------------------------------- |  |  | -- | - | ---- |  | ----- | ---- |  |  | ---- | - |  |  | ---- | -
|                                                                     |  |  |    |   | 2013 |  |       | 2012 |  |  | 2011 |  
|                                                                     |  |  |    |  
|Net income for the year                                              |  |  |    |   |      |  | 852   |      |  |  | 673  |   |  |  | 677  |  
|                                                                     |  |  |    |  
|Other comprehensive income (net of taxes)                            |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|                                                                     |  |  |    |  
|Items that will not be reclassified to profit or loss:               |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|Actuarial profits and loss                                           |  |  |    |   |      |  | 10    |      |  |  | (7   | ) |  |  | 15   |  
|                                                                     |  |  |    |  
|Items that may be subsequently reclassified to profit or loss:       |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|Foreign currency translation                                         |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|Recognized in equity                                                 |  |  | (a | ) |      |  | 107   |      |  |  | 6    |   |  |  | 1    |  
|Transferred to income                                                |  |  | (b | ) |      |  |      |      |  |  |     |   |  |  | (134 | )
|Recognized to non-controlling interest                               |  |  |    |   |      |  | 171   |      |  |  | 39   |   |  |  |     |  
|                                                                     |  |  |    |  
|Other comprehensive income related to our equity accounted investees |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|Translation adjustment                                               |  |  |    |   |      |  |      |      |  |  | 7    |   |  |  | 12   |  
|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|Other comprehensive income for the year                              |  |  |    |   |      |  | 288   |      |  |  | 45   |   |  |  | (106 | )
|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|                                                                     |  |  |    |  
|Total other comprehensive income                                     |  |  |    |   |      |  | 1,140 |      |  |  | 718  |   |  |  | 571  |  
|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|From continuing operations                                           |  |  |    |   |      |  | 1,140 |      |  |  | 718  |   |  |  | (1   | )
|From discontinued operations                                         |  |  |    |   |      |  |      |      |  |  |     |   |  |  | 572  |  
|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|                                                                     |  |  |    |  
|                                                                     |  |  |    |   |      |  | 1,140 |      |  |  | 718  |   |  |  | 571  |  
|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|                                                                     |  |  |    |  
|Attributable to:                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|Shareholders of the Company                                          |  |  |    |   |      |  | 896   |      |  |  | 624  |   |  |  | 575  |  
|Non-controlling interest                                             |  |  |    |   |      |  | 244   |      |  |  | 94   |   |  |  | (4   | )
|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  
|Total                                                                |  |  |    |   |      |  | 1,140 |      |  |  | 718  |   |  |  | 571  |  
|                                                                     |  |  |    |   |      |  |       |      |  |  |      |   |  |  |      |  



|(a) | Net effect of exchange differences arising from the indebtedness designated as a hedge of the net foreign investment (Note 2.6.5).
|--- | ----------------------------------------------------------------------------------------------------------------------------------

|(b) | Arising from the sale of Innova (Note 18.2).
|--- | --------------------------------------------



F-6



---

##### Table of Contents

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION

AS OF DECEMBER 31, 2013, 2012 AND JANUARY 1, 2012

(Stated in millions of Argentine pesos)



|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|---------------------------------------------------------------------- |  | ----- | ---- |  | ---------- |  | ------ | ---------- |  |  | ---------- | - |  |  | ------ | 
|                                                                       |  | Notes |      |  | 12.31.2013 |  |        | 12.31.2012 |  |  | 01.01.2012 |  
|                                                                       |  |       |      | 
|CURRENT ASSETS                                                         |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|Cash and cash equivalents                                              |  |       | 12   |  |            |  | 1,193  |            |  |  | 1,260      |   |  |  | 1,192  | 
|Other investments                                                      |  |       | 14   |  |            |  | 23     |            |  |  | 20         |   |  |  | 21     | 
|Trade receivables                                                      |  |       | 15   |  |            |  | 2,519  |            |  |  | 2,168      |   |  |  | 1,871  | 
|Other receivables                                                      |  |       | 15   |  |            |  | 1,551  |            |  |  | 1,553      |   |  |  | 1,070  | 
|Inventories                                                            |  |       | 16   |  |            |  | 1,310  |            |  |  | 1,023      |   |  |  | 970    | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|Total current assets                                                   |  |       |      |  |            |  | 6,596  |            |  |  | 6,024      |   |  |  | 5,124  | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|NON-CURRENT ASSETS                                                     |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|Trade receivables                                                      |  |       | 15   |  |            |  | 73     |            |  |  | 86         |   |  |  | 211    | 
|Other receivables                                                      |  |       | 15   |  |            |  | 245    |            |  |  | 238        |   |  |  | 896    | 
|Inventories                                                            |  |       | 16   |  |            |  | 58     |            |  |  | 45         |   |  |  | 39     | 
|Other investments                                                      |  |       | 14   |  |            |  | 301    |            |  |  | 279        |   |  |  | 348    | 
|Investments in associates                                              |  |       | 13.2 |  |            |  | 3,568  |            |  |  | 3,006      |   |  |  | 2,943  | 
|Investments in companies under joint control                           |  |       | 13.1 |  |            |  | 497    |            |  |  | 689        |   |  |  | 724    | 
|Property, plant and equipment                                          |  |       | 17   |  |            |  | 9,524  |            |  |  | 8,480      |   |  |  | 7,056  | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|Total non-current assets                                               |  |       |      |  |            |  | 14,266 |            |  |  | 12,823     |   |  |  | 12,217 | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|Total assets                                                           |  |       |      |  |            |  | 20,862 |            |  |  | 18,847     |   |  |  | 17,341 | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|EQUITY                                                                 |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|Capital Stock                                                          |  |       | 19   |  |            |  | 2,019  |            |  |  | 2,019      |   |  |  | 1,010  | 
|Other items in Capital                                                 |  |       |      |  |            |  | 2,186  |            |  |  | 2,186      |   |  |  | 2,186  | 
|Reserves income                                                        |  |       | 21.1 |  |            |  | 6,508  |            |  |  | 5,953      |   |  |  | 448    | 
|Other                                                                  |  |       |      |  |            |  | (693   | )          |  |  | (693       | ) |  |  |       | 
|Unappropiated retained earnings                                        |  |       | 20   |  |            |  | 752    |            |  |  | 528        |   |  |  | 6,635  | 
|Other comprehensive income                                             |  |       | 21.2 |  |            |  | 189    |            |  |  | 72         |   |  |  | 66     | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|Total shareholders equity attributable to shareholders of the Company |  |       |      |  |            |  | 10,961 |            |  |  | 10,065     |   |  |  | 10,345 | 
|Non-controlling interest                                               |  |       |      |  |            |  | 734    |            |  |  | 506        |   |  |  | 3      | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|Total equity                                                           |  |       |      |  |            |  | 11,695 |            |  |  | 10,571     |   |  |  | 10,348 | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|CURRENT LIABILITIES                                                    |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|Accounts payable                                                       |  |       |      |  |            |  | 2,553  |            |  |  | 1,863      |   |  |  | 1,572  | 
|Short-term loans                                                       |  |       | 22.3 |  |            |  | 208    |            |  |  | 1,108      |   |  |  | 40     | 
|Payroll and social security taxes                                      |  |       |      |  |            |  | 304    |            |  |  | 258        |   |  |  | 194    | 
|Taxes payable                                                          |  |       |      |  |            |  | 578    |            |  |  | 470        |   |  |  | 310    | 
|Provisions                                                             |  |       | 25   |  |            |  | 385    |            |  |  | 643        |   |  |  | 516    | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|Total current liabilities                                              |  |       |      |  |            |  | 4,028  |            |  |  | 4,342      |   |  |  | 2,632  | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|NON-CURRENT LIABILITIES                                                |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|Accounts payable                                                       |  |       |      |  |            |  | 7      |            |  |  | 172        |   |  |  | 184    | 
|Long-term loans                                                        |  |       | 22.3 |  |            |  | 2,024  |            |  |  | 1,558      |   |  |  | 2,182  | 
|Employment benefit obligations                                         |  |       | 24   |  |            |  | 336    |            |  |  | 269        |   |  |  | 195    | 
|Deferred income tax liabilities                                        |  |       | 23   |  |            |  | 548    |            |  |  | 354        |   |  |  | 247    | 
|Provisions                                                             |  |       | 25   |  |            |  | 2,224  |            |  |  | 1,581      |   |  |  | 1,553  | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|Total non-current liabilities                                          |  |       |      |  |            |  | 5,139  |            |  |  | 3,934      |   |  |  | 4,361  | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|Total liabilities                                                      |  |       |      |  |            |  | 9,167  |            |  |  | 8,276      |   |  |  | 6,993  | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 
|                                                                       |  |       |      | 
|TOTAL LIABILITIES AND EQUITY                                           |  |       |      |  |            |  | 20,862 |            |  |  | 18,847     |   |  |  | 17,341 | 
|                                                                       |  |       |      |  |            |  |        |            |  |  |            |   |  |  |        | 



F-7



---

##### Table of Contents

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(Stated in millions of Argentine pesos)



|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|--------------------------------------------------------------- |  | ----- | ---- | - | ------------------------------------------- |  | ----- | ------------------------- |  |  | --------------------------------- |  |  | ------------------------------------------------- | --- |  | ------------ |  | -- | ------------------------ |  |  | ---------------------- |  |  | -------- | ------ | - | -------------------------------- |  | ----- | ------------------------ |  |  | ----- | - |  | ----------------------- | ------ | - | ----------- |  | ---- | - |  |  | ------ | - |  |  | --- | - |  |  | ------ | -
|                                                                |  |       |      |   | Attributable to shareholders of the company |  |       |                           |  |  |                                   | 
|                                                                |  |       |      |   | Capital stock                               |  |       | Rertained earnings        |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          | 
|                                                                |  |       |      |   |                                             |  |       | Other items in Capital    |  |  | Reserves income                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  | 
|                                                                |  | Notes |      |   | Capitalstock                                |  |       | Adjustmentto capitalstock |  |  | Additionalpaid-incapitalfrommeger |  |  | Additionalpaid-incapital onsales ofstock ofparent |     |  | Legalreserve |  |    | Futureinvestmentreserves |  |  | Futuredividendsreserve |  |  | Other(2) |        |   | Unappropriatedretained 
earnings |  |       | Othercomprehensiveincome |  |  | Total |   |  | Non-controllinginterest |        |   | Totalequity | 
|Balances as of December 31, 2010                                |  |       |      |   |                                             |  | 1,010 |                           |  |  | 1,230                             |  |  |                                                   | 912 |  |              |  | 44 |                          |  |  | 448                    |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | 6,150  |   |             |  | 152  |   |  |  | 9,946  |   |  |  | 7   |   |  |  | 9,953  |  
|Adjustment of prior years results                              |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         | (13    | ) |             |  | 20   |   |  |  | 7      |   |  |  |     |   |  |  | 7      |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|Balances as of December 31, 2010, adjusted                      |  |       |      |   |                                             |  | 1,010 |                           |  |  | 1,230                             |  |  |                                                   | 912 |  |              |  | 44 |                          |  |  | 448                    |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | 6,137  |   |             |  | 172  |   |  |  | 9,953  |   |  |  | 7   |   |  |  | 9,960  |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Other comprehensive income for the year                         |  |       | (1   | ) |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         |       |   |             |  | (106 | ) |  |  | (106   | ) |  |  |    |   |  |  | (106   | )
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Shareholders decisions of April 6, 2011                        |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|- Cash dividends                                                |  |       | (3   | ) |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | (183   | ) |             |  |     |   |  |  | (183   | ) |  |  |    |   |  |  | (183   | )
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Net income                                                      |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | 681    |   |             |  |     |   |  |  | 681    |   |  |  | (4  | ) |  |  | 677    |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|Balances as of December 31, 2011                                |  |       |      |   |                                             |  | 1,010 |                           |  |  | 1,230                             |  |  |                                                   | 912 |  |              |  | 44 |                          |  |  | 448                    |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | 6,635  |   |             |  | 66   |   |  |  | 10,345 |   |  |  | 3   |   |  |  | 10,348 |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Other comprehensive income for the year                         |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         |       |   |             |  | 6    |   |  |  | 6      |   |  |  | 39  |   |  |  | 45     |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Shareholders Meeting decisions of March 29, 2012               |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|- Capitalization                                                |  |       |      |   |                                             |  | 1,009 |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | (1,009 | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|- Legal reserve                                                 |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  | 35                     |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | (35    | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|- Future investments reserve                                    |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          | 4,781  |   |                                  |  |      |                          |  |  |      |   |  |                         | (4,781 | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|- Future dividends reserve                                      |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  | 900   |                          |  |  |      |   |  |                         | (900   | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|- Cash dividends                                                |  |       | (3   | ) |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  | (211  | )                        |  |  |      |   |  |                         |       |   |             |  |     |   |  |  | (211   | ) |  |  | (18 | ) |  |  | (229   | )
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Acquisition of PELSA                                            |  |       | 13.5 |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  | (693  | ) |  |                         |       |   |             |  |     |   |  |  | (693   | ) |  |  | 427 |   |  |  | (266   | )
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Net income                                                      |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | 618    |   |             |  |     |   |  |  | 618    |   |  |  | 55  |   |  |  | 673    |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|Balances as of December 31, 2012                                |  |       |      |   |                                             |  | 2,019 |                           |  |  | 1,230                             |  |  |                                                   | 912 |  |              |  | 44 |                          |  |  | 483                    |  |  |          | 4,781  |   |                                  |  | 689   |                          |  |  | (693  | ) |  |                         | 528    |   |             |  | 72   |   |  |  | 10,065 |   |  |  | 506 |   |  |  | 10,571 |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Other comprehensive income for the year                         |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         |       |   |             |  | 117  |   |  |  | 117    |   |  |  | 171 |   |  |  | 288    |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Shareholders Meeting decisions of March 21, 2013               |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|a) Allocation of retained earnings:                             |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|- Legal reserve                                                 |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  | 32                     |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | (32    | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|- Future investments reserve                                    |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          | 523    |   |                                  |  |      |                          |  |  |      |   |  |                         | (523   | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|b) Resolution of the balance of reserves for future investment: |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|- Reversal by investments                                       |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          | (2,999 | ) |                                  |  |      |                          |  |  |      |   |  |                         | 2,999  |   |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|- Constitution for new investments                              |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          | 2,638  |   |                                  |  |      |                          |  |  |      |   |  |                         | (2,638 | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|- Future dividends reserve                                      |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  | 361   |                          |  |  |      |   |  |                         | (361   | ) |             |  |     |   |  |  |       |   |  |  |    |   |  |  |       |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Dividends in cash                                               |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         |       |   |             |  |     |   |  |  |       |   |  |  | (16 | ) |  |  | (16    | )
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                  
|Net income                                                      |  |       |      |   |                                             |  |      |                           |  |  |                                  |  |  |                                                   |    |  |              |  |   |                          |  |  |                       |  |  |          |       |   |                                  |  |      |                          |  |  |      |   |  |                         | 779    |   |             |  |     |   |  |  | 779    |   |  |  | 73  |   |  |  | 852    |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  
|Balances as of December 31, 2013                                |  |       |      |   |                                             |  | 2,019 |                           |  |  | 1,230                             |  |  |                                                   | 912 |  |              |  | 44 |                          |  |  | 515                    |  |  |          | 4,943  |   |                                  |  | 1,050 |                          |  |  | (693  | ) |  |                         | 752    |   |             |  | 189  |   |  |  | 10,961 |   |  |  | 734 |   |  |  | 11,695 |  
|                                                                |  |       |      |   |                                             |  |       |                           |  |  |                                   |  |  |                                                   |     |  |              |  |    |                          |  |  |                        |  |  |          |        |   |                                  |  |       |                          |  |  |       |   |  |                         |        |   |             |  |      |   |  |  |        |   |  |  |     |   |  |  |        |  



|(1) | The change is net of the effects of the sale of Innova in the amount of 134 (Note 18.2)
|--- | ---------------------------------------------------------------------------------------

|(2) | Balances due to business combination of companies under common control (Note 2.6.5)
|--- | -----------------------------------------------------------------------------------

|(3) | Cash dividends per share amounted to $0.10 and $0.18 in fiscal years ended December 31, 2012 and 2011, respectively.
|--- | --------------------------------------------------------------------------------------------------------------------



F-8



---

##### Table of Contents

PETROBRAS ARGENTINA S.A.



CONSOLIDATED STATEMENTS OF CASH FLOWS

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(Stated in millions of Argentine
pesos)



|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|----------------------------------------------------------------------------------------- |  | ----- | ------ |  | ---- |  | ------ | ---- |  |  | ------ | - |  |  | ------ | -
|                                                                                          |  | Notes |        |  | 2013 |  |        | 2012 |  |  | 2011   |  
|                                                                                          |  |       |        | 
|Cash provided by (used in) operations:                                                    |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|Net income                                                                                |  |       |        |  |      |  | 852    |      |  |  | 673    |   |  |  | 677    |  
|                                                                                          |  |       |        | 
|Reconciliation to net cash provided by (used in) operating activities:                    |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|                                                                                          |  |       |        | 
|Share of profit of equity accounted investees                                             |  |       | 13.3   |  |      |  | 279    |      |  |  | 148    |   |  |  | 36     |  
|Financial results, net                                                                    |  |       |        |  |      |  | (419   | )    |  |  | (289   | ) |  |  | (125   | )
|Depreciation of property, plant and equipment                                             |  |       | 17     |  |      |  | 2,194  |      |  |  | 1,738  |   |  |  | 1,205  |  
|Abandoned and non-productive well write-downs                                             |  |       | 8      |  |      |  | 27     |      |  |  | 168    |   |  |  | 294    |  
|CIESA Debt Restructuring                                                                  |  |       | 13.1.4 |  |      |  |       |      |  |  | (221   | ) |  |  |       |  
|Disposal of property, plant and equipment                                                 |  |       |        |  |      |  | (3     | )    |  |  | (23    | ) |  |  | (30    | )
|Gain from the sale of Innova S.A.                                                         |  |       | 18.2   |  |      |  |       |      |  |  |       |   |  |  | (706   | )
|Gain from the sale of fertilizer business                                                 |  |       |        |  |      |  | 34     |      |  |  |       |   |  |  |       |  
|Writedown of contractual credit in Ecuador                                                |  |       | 9      |  |      |  |       |      |  |  | 61     |   |  |  | 143    |  
|Income tax                                                                                |  |       | 23     |  |      |  | 552    |      |  |  | 492    |   |  |  | 15     |  
|Accrued interest                                                                          |  |       |        |  |      |  | 212    |      |  |  | 199    |   |  |  | 206    |  
|Other                                                                                     |  |       |        |  |      |  | 49     |      |  |  | 75     |   |  |  | 88     |  
|                                                                                          |  |       |        | 
|Changes in assets and liabilities:                                                        |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|Trade receivables                                                                         |  |       |        |  |      |  | (271   | )    |  |  | 8      |   |  |  | (700   | )
|Other receivables                                                                         |  |       |        |  |      |  | (298   | )    |  |  | 148    |   |  |  | 9      |  
|Inventories                                                                               |  |       |        |  |      |  | (294   | )    |  |  | (48    | ) |  |  | (55    | )
|Accounts payable                                                                          |  |       |        |  |      |  | 241    |      |  |  | 333    |   |  |  | 42     |  
|Payroll and social security taxes                                                         |  |       |        |  |      |  | 118    |      |  |  | 122    |   |  |  | 62     |  
|Taxes payable                                                                             |  |       |        |  |      |  | 161    |      |  |  | (81    | ) |  |  | (202   | )
|Provisions                                                                                |  |       |        |  |      |  | (28    | )    |  |  | (92    | ) |  |  | 559    |  
|Dividends collected                                                                       |  |       | 13.4   |  |      |  | 23     |      |  |  | 14     |   |  |  | 416    |  
|Interest paid                                                                             |  |       |        |  |      |  | (216   | )    |  |  | (178   | ) |  |  | (215   | )
|Income tax paid                                                                           |  |       |        |  |      |  | (435   | )    |  |  | (345   | ) |  |  | (7     | )
|Net cash used in discontinued operations                                                  |  |       | 18.2   |  |      |  |       |      |  |  |       |   |  |  | (17    | )
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|Net cash provided by operations                                                           |  |       |        |  |      |  | 2,778  |      |  |  | 2,902  |   |  |  | 1,695  |  
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|                                                                                          |  |       |        | 
|Cash provided by (used in) investing activities:                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|                                                                                          |  |       |        | 
|Acquisition of property, plant and equipment                                              |  |       |        |  |      |  | (2,524 | )    |  |  | (1,994 | ) |  |  | (1,763 | )
|Acquisition of interests in companies and oil and gas areas                               |  |       |        |  |      |  |       |      |  |  | (1,005 | ) |  |  |       |  
|Debt restructuring charge for CIESA                                                       |  |       |        |  |      |  |       |      |  |  | 195    |   |  |  |       |  
|Sale of property, plant and equipment, interests in companies and oil and gas areas       |  |       |        |  |      |  | 605    |      |  |  | 108    |   |  |  | 1,015  |  
|Net variation in investments other than cash and cash equivalents                         |  |       |        |  |      |  | 35     |      |  |  | 81     |   |  |  | 18     |  
|Fideicomiso Financiero de Obra Gasoducto Sur (Financial Trust for Works on Gasoducto Sur) |  |       |        |  |      |  | 34     |      |  |  | 36     |   |  |  | 35     |  
|Net cash used in investment activities for discontinued operations                        |  |       | 18.2   |  |      |  |       |      |  |  |       |   |  |  | (77    | )
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|Net cash used in investing activities                                                     |  |       |        |  |      |  | (1,850 | )    |  |  | (2,579 | ) |  |  | (772   | )
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|                                                                                          |  |       |        | 
|Cash provided by (used in) financing activities:                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|Net increase (decrease) in short term loans                                               |  |       |        |  |      |  | 96     |      |  |  | 2      |   |  |  | (5     | )
|Increase in long term loans                                                               |  |       |        |  |      |  | 49     |      |  |  |       |   |  |  |       |  
|Payment of loans with original long-term maturity                                         |  |       |        |  |      |  | (1,302 | )    |  |  | (85    | ) |  |  | (1,747 | )
|Cash dividends paid                                                                       |  |       |        |  |      |  | (16    | )    |  |  | (229   | ) |  |  | (183   | )
|Net cash provided by financing activities for discontinued operations                     |  |       | 18.2   |  |      |  |       |      |  |  |       |   |  |  | 4      |  
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|Net cash used in financing activities                                                     |  |       |        |  |      |  | (1,173 | )    |  |  | (312   | ) |  |  | (1,931 | )
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|                                                                                          |  |       |        | 
|(Decrease) increase in cash and cash equivalents                                          |  |       |        |  |      |  | (245   | )    |  |  | 11     |   |  |  | (1,008 | )
|                                                                                          |  |       |        | 
|Cash and cash equivalents at the beginning of the year                                    |  |       |        |  |      |  | 1,260  |      |  |  | 1,192  |   |  |  | 2,113  |  
|                                                                                          |  |       |        | 
|Effect of exchange rate change on cash and cash equivalents                               |  |       |        |  |      |  | 178    |      |  |  | 57     |   |  |  | 87     |  
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  
|Cash and cash equivalents at the end of the year                                          |  |       | 12     |  |      |  | 1,193  |      |  |  | 1,260  |   |  |  | 1,192  |  
|                                                                                          |  |       |        |  |      |  |        |      |  |  |        |   |  |  |        |  



F-9



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##### Table of Contents

PETROBRAS ARGENTINA S.A.



NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND JANUARY 1, 2012 AND

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(stated in
millions of Argentine pesos, except as otherwise indicated)



|1. | General information
|-- | -------------------

1.1. The Company

Petrobras Argentina is a
corporation (sociedad anónima) with its main office located in the Autonomous City of Buenos Aires, Argentina.

Petrobras Argentinas shares are listed on the Buenos Aires Stock Exchange. Its ADS, each of them representing 10 Class B common shares of Petrobras Argentina, are listed on the NYSE.

1.2. Business of the Company

Petrobras Argentinas business is mainly focused on the energy sector, specifically in oil and gas exploration and
production, refining and distribution, petrochemical activities, electricity and sale and distribution of hydrocarbons. Petrobras Argentina S.A. holds operations in Argentina, Bolivia, Ecuador and Venezuela. As from January 2010 and March 2011, the
Company discontinued its businesses in fertilizer business segment (Note 18.1) and in Brazil (Note 18.3), respectively. The Companys fiscal year ends on December 31 of each year.

In these consolidated financial statements, Petrobras Argentina and its subsidiaries are jointly referred to as the
Company or PESA.

The Board of Directors approved the issuance of these consolidated
financial statements (hereinafter financial statements) on February 12, 2014.

1.3.
Controlling Group

Petrobras Participaciones S.L. is the immediate parent company of Petrobras
Argentina, with an ownership interest of 67.2%.

Petrobras Participaciones S.L. is a subsidiary of
Petróleo Brasileiro, a Brazilian company whose business is focused on exploration, production, refining, sale and transportation of oil and its byproducts in Brazil and abroad.



|2. | Basis of presentation
|-- | ---------------------

2.1. Statement of compliance

These financial
statements have been prepared in accordance with IFRS as issued by the IASB.

2.2. Summary of the
significant accounting policies

The significant accounting policies adopted in the preparation of
these financial statements are described below, which have been consistently applied in these financial statements.

These accounting policies have been applied consistently by all Group companies.

For comparative purposes, the necessary reclassifications were made to the financial statements of prior years in order to present them on a consistent basis as indicated in note 2.2.1.

All changes detailed above do not affect the decisions made based on it.



F-10



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##### Table of Contents

PETROBRAS ARGENTINA S.A.



2.2.1 New standards and interpretations issued by the IASB effective as of
December 31, 2013 and that have been adopted by the Company

IFRS 7 Financial InstrumentsDisclosures

The amendment to IFRS 7 adds information to evaluate the effect of netting agreements.

Application of amendment to IFRS 7 did not result in additional new disclosures.

IFRS 10 Consolidated Financial Statements

The objective of IFRS 10 is to have a single basis for consolidation for all entities, regardless of the nature of the company in which the investor holds its interest, and that basis is control. The
definition of control includes three elements: a) power to govern the financial and operating policies of an entity, b) exposure or right to variable returns of an entity and c) the ability to use power over an entity to affect the investors
returns. IFRS 10 replaces those parts of IAS 27 that address when and how an investor should prepare consolidated financial statements and replaces SIC-12 in its entirety.

Application of amendment to IFRS 10 did not impact the Companys results of operations or its financial position.

IFRS 11 Joint Arrangements

IFRS 11 classifies joint arrangements as either joint operations (combining the existing concepts of jointly controlled assets and joint controlled operations) or joint ventures (similar to the existing
concept of jointly controlled entity).

Application of amendment to IFRS 11 did not impact the Companys
results of operations or its financial position.

IFRS 12 Disclosure of Interests in Other Entities

IFRS 12 applies to entities with interests in subsidiaries, joint arrangements, associates or unconsolidated structured
entities. IFRS 12 sets out disclosure objectives, which are those that help users of financial statements to evaluate the nature and risks associated with their interests in other entities.

New disclosures have been included in note 13.

IFRS 13 Fair Value Measurement

IFRS 13
provides a single framework for measuring fair value when it is required by other standards. IFRS 13 applies to both financial and non-financial assets and liabilities measured at fair value, and defines fair value as the price that would be
received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Also, IFRS 13 requires disclosures about fair value measurements.

Application of IFRS 13 did not did impact the Companys financial position nor involve new disclosures.

IAS 1 Presentation of Financial Statements

Amendment to IAS 1 improves the presentation of items within the Consolidated Statement of Comprehensive Income by classifying them by nature and grouping them in items that will be reclassified to profit
or loss in subsequent periods, and those that will not be reclassified to profit and loss.

The indicated
classification was made retroactively to the comparative information included in these financial statements.



F-11



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##### Table of Contents

PETROBRAS ARGENTINA S.A.



IAS 19 Employee Benefits

The Company adopted the amendments to IAS 19, for which the IASB eliminated the option to defer the recognition of
actuarial gains and losses and prior service costs in the measurement of defined benefit plans.

In addition,
in order to unify employment benefit obligations, other related liabilities have been reclassified, which were previously included in Provisions.

Both changes was made retroactively adjusted on the comparative information included in these financial statements. The affected items were:



|                                |  |            |       |  |             |  |     |          |  |  |        |  |  |             |       |  |          |  |     |   |  |  |       | 
|------------------------------- |  | ---------- | ----- |  | ----------- |  | --- | -------- |  |  | ------ |  |  | ----------- | ----- |  | -------- |  | --- | - |  |  | ----- | 
|                                |  | 12.31.2012 |       |  | 01.01.2012  | 
|                                |  | Issued     |       |  | Adjustments |  |     | Modified |  |  | Issued |  |  | Adjustments |       |  | Modified | 
|EQUITY                          |  |            |       |  |             |  |     |          |  |  |        |  |  |             |       |  |          |  |     |   |  |  |       | 
|Unappropiated retained earnings |  |            | 555   |  |             |  | (27 | )        |  |  | 528    |  |  |             | 6,665 |  |          |  | (30 | ) |  |  | 6,635 | 
|Other comprehensive income      |  |            | 44    |  |             |  | 28  |          |  |  | 72     |  |  |             | 31    |  |          |  | 35  |   |  |  | 66    | 
|NON-CURRENT LIABILITIES         |  |            |       |  |             |  |     |          |  |  |        |  |  |             |       |  |          |  |     |   |  |  |       | 
|Employment benefit obligations  |  |            | 247   |  |             |  | 22  |          |  |  | 269    |  |  |             | 188   |  |          |  | 7   |   |  |  | 195   | 
|Deferred income tax liabilities |  |            | 354   |  |             |  |    |          |  |  | 354    |  |  |             | 245   |  |          |  | 2   |   |  |  | 247   | 
|Provisions                      |  |            | 1,604 |  |             |  | (23 | )        |  |  | 1,581  |  |  |             | 1,567 |  |          |  | (14 | ) |  |  | 1,553 | 

2.2.2 New standards and interpretations issued by the IASB not effective as of
December 31, 2013 and that have not been earlier adopted by the Company

IFRS 9 Financial instruments

In November 2009, the IASB issued IFRS 9 Financial Instruments which sets out new requirements
for the classification and measurement of financial assets and liabilities. Subsequently, the IASB amended IFRS 9. IFRS 9 does not have a mandatory effective date, however, its application is permitted.

The Company is currently analyzing the resulting effects on the presentation of the PESAs results of operations,
financial position or cash flows and will also consider the impact of IFRS 9 when completed by the IASB.

IAS 32 Financial
Instruments - Disclosure and Presentation

In December 2011, the IASB amended IAS 32 Financial
InstrumentsPresentation, which is applicable for years beginning on or after January 1, 2014, allowing early application.

Amendment to IAS 32 alters the application guidance in matters relating to the compensation of financial assets and liabilities.

The Company is currently analyzing the impact of the amendment to IAS 32, however, the Company estimates that the
application of it will not impact the results of operations or financial condition of the Company, but will only involve new disclosures.

IFRIC 21 Levies

In May 2013, the IASB issued IFRIC 21 Levies interpretation, which is applicable for periods beginning on or after January 1, 2014 , allowing early application.

IFRIC 21 addresses the accounting for a liability to pay a levy imposed by the government according to the law.

The Company is currently assessing the impact of IFRIC 21, however, it is estimated that the implementation of
the same will not impact significantly on the results of operations or financial position of the Company.



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IAS 36 Impairment of Assets

In May 2013, the IASB amended IAS 36 Impairment of Assets , which is applicable for periods beginning on or
after January 1, 2014 , allowing early application.

The amendment alters IAS 36 disclosure requirements
regarding the determination of the value of asset impairment.

The application of the amended IAS 36 will not
impact the results of operations or financial position of the Company, but will only involve new disclosures.

Annual cycle of improvements
to IFRSs

In December 2013, the IASB published two documents containing amendments to IFRSs that are mostly
applicable for periods beginning on or after July 1, 2014, allowing early application.

The Company is
currently analyzing the impact of the implementation of the amendments, however, anticipate that the same will not impact the results of operations or financial position of the Company, but will only involve new revelations.

2.3. Consolidation and interests in other companies

2.3.1. Investments in related companies

2.3.1.1. Subsidiaries

Subsidiaries are entities over which the Company exercises control as a consequence of their exposure or rights to
variable returns and their ability to influence them through its power to direct the relevant activities, including generally a shareholding of more than half of the voting rights.

Subsidiaries are fully consolidated as from the date on which control is transferred to the Company. They are
deconsolidated from the date that control ceases.

The Company applies the acquisition method to account for
business combinations. The acquisition cost is determined as the fair value of the assets transferred, equity instruments issued and debt assumed at acquisition date. Costs directly attributable to acquisition are charged to income as incurred. A
non-controlling interest in the acquired company is measured at fair value at acquisition date or on the basis of the proportional value of net assets acquired. The excess of acquisition cost and the non-controlling interest amount in the acquired
company over net identifiable assets is recorded as goodwill. If this amount is lower than fair value of net assets acquired, the difference is recognized in the Consolidated Statement of Income.

Acquisitions of subsidiaries qualifying as companies under joint control are recorded following the guidelines described
in Note 2.3.1.4.

Since the functional currency of some subsidiaries is different from the functional currency
of the Company, exchange gains or losses arise from intercompany operations. Those exchange results are included in Financial results in the Consolidated Statement of Income.

The accounting policies of subsidiaries have been changed as deemed necessary for consistency with the accounting
policies adopted by the Company.

Petrobras Argentina has consolidated line by line its financial statements
with those of companies over which it exercises control.

In the consolidation of subsidiaries, the amount of
the investment in such subsidiaries and the share in their profit (loss) and cash flows are replaced by the aggregate assets, liabilities, income (loss) and cash flows of such subsidiaries, while the non-controlling interest is reflected separately.
The intercompany receivables, payables and transactions within the consolidated group are eliminated in the consolidation. The unrealized intercompany gains (losses) from transactions within the consolidated group have been completely eliminated.



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2.3.1.2. Interest in joint arrangements

A joint arrangement is a contractual agreement whereby two or more parties engage joint control. Joint control exists only
when decisions relating to the relevant activities require the unanimous consent of the parties sharing control.

A joint operation is a joint arrangement whereby the parties that have joint control of the arrangement have rights to the assets and obligations for the liabilities, relating to the arrangement.

A joint venture is a joint arrangement whereby the parties that have joint control of the arrangement have
rights to the net assets of the same.

2.3.1.2.1. Joint ventures

Investments in joint ventures are initially recognized at cost and are subsequently measured under the equity method.

As of December 31, 2013, 2012 and January 1, 2012, the Company exercises joint control over CIESA. At
December 31, 2012 and January 1, 2012 the Company had joint control over Distrilec whose sale was effective on January 30, 2013 (Note 13.1.1) .

The intercompany gains (losses) from transactions between the Company and entities under joint control are eliminated proportionally to the Companys interest in such companies.

The accounting policies of entities under joint control were changed as deemed necessary for consistency with the
accounting policies adopted by the Company.

The carrying value of investments in joint ventures, each of
which is considered a cash-generating unit, is assessed for impairment when facts or changes in circumstances indicate that the book value could not be recoverable and, if applicable, an impairment loss is recorded.

2.3.1.2.2. Joint operations

The Company recognizes its proportionate interest in the joint operations assets, liabilities, revenues, costs and
expenses related to its participation in joint operations in different consortia and joint ventures for exploration and production of hydrocarbons.

2.3.1.3. Associates

Associates are entities over
which the Company has significant influence but not control, generally representing a shareholding of between 20% and 50% of the voting rights. Investments in associates are initially recognized at cost, including goodwill recognized at the
acquisition date and subsequently measured under the equity method.

The intercompany gains (losses) from
transactions between the Company and associates are eliminated proportionally to the Companys interest in such companies.

The accounting policies of associates have been changed as deemed necessary for consistency with the accounting policies adopted by the Company.

The carrying value of investments in associates, each of which is considered a cash-generating unit, is assessed for
impairment when facts or changes in circumstances indicate that the book value could not be recoverable and, if applicable, an impairment loss is recorded.



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2.3.1.4. Business combination under common control

At May 31, 2012, PELSA was a company controlled by Petrobras Holdings Ltd., with a direct holding of 39.671% and
19.21% indirect holding through Petrobras Argentina, so it qualifies as a company under common control (Note 13.5).

Business combinations between companies under common control are accounted for by considering the book value of the acquired company in the holding company ultimately in this case, Petrobras
Participaciones SL. The difference between the price paid and the carrying amount mentioned before is recorded in equity (Other Note 2.6.5). The transaction costs are expensed in the period in which they accrue.

2.3.2. Financial information

In preparing these financial statements, the financial information of companies over which the Company exercises control,
joint control and associates as of December 31, 2013, 2012 and January 1, 2012 was used, or the best available financial information as of those dates, adapted to an equal period of time.

2.4 Translation of foreign operations

The main considerations of conversion operations functional currency different from the presentation currency are shown
below.

2.4.1. Functional and presentation currency

The financial information of the Companys entities was prepared in its functional currency, that is, the currency of
the primary economic environment in which the entity operates. The functional and the presentation currency of the PESAs financial statements is the Argentine peso.

2.4.2. Outstanding balances and transactions

Foreign currency transactions are remeasured into the functional currency using the exchange rates prevailing at the date
of the transaction.

Foreign exchange gains and losses resulting from settlement of such operations or from
remeasurement at year-end of monetary assets and liabilities denominated in foreign currency are recognized in the Consolidated Statements of Income, except for cash flow or net investment hedges that qualify for exposure as Other comprehensive
income.

2.4.3. Subsidiaries and associates

The results and financial position of subsidiaries and associates that have a functional currency other than the
PESAs presentation currency are translated into the presentation currency as follows:



| |  |  | the assets and liabilities are translated using the closing exchange rate;
| | - |  | --------------------------------------------------------------------------



| |  |  | the gains or losses are translated using the exchange rates prevailing at the date of the transactions.
| | - |  | -------------------------------------------------------------------------------------------------------

The results from the remeasurement process into the functional currency are recorded in line Financial results of the
Consolidated Statement of Income.

The results from the remeasurement process into the functional currency to
presentation currency transactions are recognized in Other Comprehensive Income. When an investment is sold or disposed of, in whole or in part, the related exchange differences are recognized in the Consolidated Statement of Income as part of the
gain/loss on the sale or disposal.



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2.5. Operating Segments Reporting

The Company has adopted IFRS 8 - Segment Reporting, which states that those business segments are identified on the basis
of internal reports about components of the Company reviewed regularly by the board, chief operating decision maker in order to allocate resources and evaluate their performance.

In segmentation the Company considers transactions with third parties and intercompany operations, which are valued as
defined internal transfer prices between segments, with verification methodologies based on market parameters

The Companys business is mainly focused on the energy sector, basically through its activities relating to oil and
gas exploration and production, refining and distribution, petrochemicals and gas and energy. Accordingly, the identified operating segments are as follows:



| | a) | Oil and Gas Exploration and Production, composed of the Companys participation in oil and gas blocks and its interests in Oleoductos del Valle
S.A., OCP, direct and indirect interest in mixed companies in Venezuela and PELSA, consolidated company as of June 1, 2012 (Note 13.5).
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b) | Refining and Distribution, including the Companys own operations in the refinery of Bahía Blanca and the gas station network, the
Companys equity interest in Refinería del Norte S.A. and the commercialization of the oil produced in Argentina, which is transferred at market prices from the Oil and Gas Exploration and Production operating segment. The 2011 year
include the operations of the refinery San Lorenzo and its network of service stations associated to the May 2, 2011 date on which the sale was finalized (Note 18.1).
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | c) | Petrochemicals, styrenics operations developed in Argentina and Brazil (in the last one until March 2011 - See Note 18.2).
| | -- | --------------------------------------------------------------------------------------------------------------------------



| | d) | Gas and Energy, comprising the Companys own operations relating to the sale of gas produced in Argentina and liquefied petroleum gas brokerage
and trading activities, its interest in TGS, the electricity generation activities of Genelba Power Plant and of Pichi Picún Leufú Hydroelectric Complex, and its interest in Enecor. The 2012 and 2011 years include Edesur shareholding ,
through its parent company Distrilec, the sale became effective on January 30, 2013 ( Note 13.1.1)
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | e) | Assets and operating income related to the Central Service Structure, those not attributable to any given operating segment and intercompany
eliminations are collectively shown. In the Central Service Structure includes common costs to individual business segments, among others, management fees, tax on financial transactions, financial liabilities and interest income tax, which are
incurred by the Company in the ordinary course of its operations and control economy that are managed from the central structure and not re-allocated between operating segments.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

2.6. Basis of measurement

The main measurement criteria used in the preparation of these financial statements are as follows:

2.6.1. Financial assets

2.6.1.1. Classification of financial assets

The Company classifies its financial assets as follows:

Financial assets at fair value through profit or loss

This
category includes financial assets acquired or held for trading or sale in the short term or those so designated by Management. Gains and losses derived from changes in fair value are recognized in the Consolidated Statement of Income.

Within this category, the Company has mutual funds which are measured at the value of those funds at each reporting date.



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Held-to-maturity financial assets

This category includes non-derivative financial assets with fixed or determinable payments and fixed maturities, when the
Company has the positive intention and ability to hold these instruments to maturity.

These assets are
initially recognized at fair value plus directly attributable transaction costs. Subsequently, held-to-maturity investments are measured at amortized cost; the effective interest method is used to recognize the related accrued interest in the
Consolidated Statement of Income. When the book value of these assets exceed their recoverable values, an impairment loss is recognized in the Consolidated Statement of Income.

Within this category, the Company holds certificates of deposit and loans to several associatess companies.

Loans and Receivables

Loans and receivables are financial instruments with fixed or determinable payments that are not quoted in an active market. They are initially recognized at fair value plus any directly attributable
transaction cost. After initial recognition, loans and receivables are measured at amortized cost using the effective interest method, less impairment loss, if applicable.

2.6.1.2. Impairment of financial assets

The Company assesses at each reporting date whether there is objective evidence that a financial asset or group of
financial assets is impaired and if so, an impairment charge is recorded under Other operating income (expense).

In the years ended December 31, 2013, 2012 and 2011, there was no impairment charge of financial assets.

2.6.1.3. Cash and cash equivalents

Cash and cash
equivalents include cash on hand, term deposits and other short-term highly liquid investments with original maturities of three months or less.

Bank overdrafts are accounted for within Loans in current liabilities in the Consolidated Statement of Financial Position.

2.6.1.4. Trade receivables and accounts payable

Trade receivables are recognized initially at fair value and subsequently measured at amortized cost using the effective
interest method, net of an allowance for bad debts, if applicable.

The amortized cost of trade receivables,
other receivables, other long-term investments, accounts payable and other payables approximates to its fair value. Also, the fair value of current bank and financial debt does not differ significantly from their carrying amount at 31 December
2013, 2012 and January 1, 2012.

An allowance for bad debts is recognized when there is objective evidence
that the Company will not be able to collect its receivables at their original maturities or for the full amount. In recognizing such allowance, the Company evaluates different factors, including the customers credit risk, historical trends
and other relevant information. Such evaluation may require future adjustments if economic conditions substantially differ from the assumptions made. The amount of the allowance is the difference between the book value of the asset and the present
value of the estimated future cash inflow, discounted at the effective interest rate. The asset is presented net of the allowance for bad debts, if applicable. The loss from bad debts is recognized in the Consolidated Statement of Income in line
Administrative and selling expenses.

Accounts payable are initially recognized at fair value and subsequently
measured at amortized cost using the effective interest method.



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2.6.1.5. Other receivables and payables

Other receivables and payables have been initially recognized at fair value and subsequently measured at their amortized
cost using the effective interest method. In addition, Other receivables include advances to suppliers measured on the basis of the amounts actually disbursed.

2.6.2. Inventories

This line item includes crude oil stock, raw materials, work in progress and finished products relating to the Refining and Distribution, Petrochemicals and Gas and Energy business segments.

Inventories are measured at the lower of acquisition or net realizable value. Cost is determined using
the weighted average price method. The cost of inventories includes expenditure incurred in purchasing and production and other necessary costs to bring them to their existing location and condition. In the case of manufactured products and the
production process, the cost includes a portion of indirect production costs, excluding any idle capacity (slack).

The net realizable value is the estimated selling price in the ordinary course of business less the estimated cost of completion and the estimated costs to make the sale

The assessment of the recoverable value of these assets is made at each reporting date, and the resulting loss is
recognized in the Consolidated Statement of Income when the inventories are overstated.

2.6.3.
Property, plant and equipment

2.6.3.1. General principles

Property, plant and equipment, except as indicated below, is measured following the cost model. Any expenditure subsequent
to the original recognition of the asset is added as a component of the asset only when the expenditure improves its condition and it is probable that future economic benefits, in excess of the originally assessed ones, will be generated by such
asset or when the expenditure relates to recognize a major repair or overhaul of the asset which is conducted to allow the continued use of the asset provided (i) such expenditure is allocated to the replacement of the component parts of the
asset, (ii) the useful life of such component parts has been calculated based on their own wear and tear or depletion and (iii) it is probable that future economic benefits will flow as a result of the expenditure.

The cost of work in progress whose construction will extend over time includes, if applicable, the computation of
financial costs accrued on loans granted by third parties and other pre-production costs, net of any income obtained from the sale of commercially valuable production during the launching period. In 2013, 2012 and 2011 no borrowing costs were
capitalized.

Property, plant and equipment related to foreign operations have been translated into the
functional currency at historical exchange rates, and they have been translated into pesos at the closing exchange rates.

2.6.3.2. Oil and gas exploration and production activities

The Company uses the successful efforts method of accounting for its oil and gas exploration and production activities. This method involves the capitalization of: (i) the cost of acquiring
properties in oil and gas exploration and production areas: (ii) the cost of drilling and equipping exploratory wells that result in the discovery of commercially recoverable reserves; (iii) the cost of drilling and equipping development
wells, and (iv) the estimated future costs of well abandonment and restoration.

According to the
successful efforts method of accounting, exploration costs, excluding exploratory well costs, are expensed during the period in which they are incurred. Drilling costs of exploratory wells are capitalized until determination is made on whether the
drilling resulted in proved reserves that justify the commercial development. If reserves are not found, such drilling costs are expensed. Occasionally, an exploratory well may determine the existence of oil and gas reserves but they cannot be
classified as proved when drilling is complete. In those cases, such costs continue to be capitalized insofar as the well has allowed to determine the existence of sufficient reserves to warrant its completion as a production well and the Company is
making sufficient progress in evaluating the economic and operating feasibility of the project.



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Estimated future well abandonment and restoration costs in hydrocarbons areas, discounted at a
current rate, are capitalized in the cost of the assets and depreciated using the units of production method. Additionally, a liability at the estimated value of the discounted amounts payable is recognized.

2.6.3.3. Depreciation

The Company depreciates productive wells, machinery and camps in the oil and gas production areas according to the units
of production method, by applying the ratio of oil and gas produced to estimated proved developed oil and gas reserves. The acquisition cost of property with proved reserves is depreciated by applying the ratio of oil and gas produced to estimated
proved oil and gas reserves. Acquisition costs related to properties with unproved reserves is valued at cost with recoverability periodically assessed on the basis of geological and engineering estimates of possible and probable reserves that are
expected to be proved over the life of each concession.

The Companys remaining items of property, plant
and equipment are depreciated by the straight-line method based on estimated useful lives, as detailed below:



|                                |  |                      |  |                  
|------------------------------- |  | -------------------- |  | -----------------
|Property, plant and equipment   |  | Years of useful life |  | Depreciation rate
|                                |  |                     
|Machinery, tools and equipments |  | 5  20               |  | 5%  20%         
|Electricity generation plants   |  | 25  33              |  | 3%  4%          
|Industrial complex              |  | 25                   |  | 4%               
|Others                          |  | 3  50               |  | 2%  33%         

The depreciation method is revised at each year-end. If expectations differ from previous
estimates, adjustments are made prospectively at closing of each year, if applicable.

Petrobras Argentina
depreciates, using the straight-line method, each significant component of the assets not related to oil and gas production areas that: (i) is identifiable as an independent component with a significant cost in relation to the total value of
the asset, and (ii) has an operating useful life that differs from another significant part of the same asset.

2.6.3.4. Impairment of nonfinancial assets

The carrying value of property, plant and equipment does not exceed their recoverable value. The Companys Management
assesses the recoverability of property, plant and equipment items whenever events or changes in circumstances (including significant decreases in the market value of assets, in the prices of the main products sold by the Company or in oil and gas
reserves, as well as changes in the regulatory framework for the Companys activities, significant increases in operating expenses, or evidence of obsolescence or physical damage) indicate that the carrying amount may not be recoverable. The
book value of an asset is adjusted down to its recoverable value if its carrying amount exceeds the latter.

From a regulatory standpoint, recoverable amount is defined as the higher of fair value less costs to sell and value in
use, the latter being defined as the addition of the discounted expected net cash flows that arise as a direct result of the use and eventual final disposition of the assets. To such end, among other elements, the premises that represent the best
estimate made by Management of the economic conditions that will prevail throughout the useful life of the assets are considered.

Discount rates used to calculate the value in use are the respective WACC. For each asset or cash generating unit a specific WACC was determined which considered the business segment and the country
conditions where the operations are performed.

In subsequent periods, the reversal of the impairment charge
is evaluated if there are changes in the assumptions used to determine the asset recoverable value. In such a case, the book value of the asset or cash generating unit is written up to the lower of: a) the book value that the asset or cash
generating unit would have had if the impairment had never been recognized; and b) its recoverable value.



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As of December 31, 2013 the Company recognized an impairment charge of 11 on property,
plant and equipment (Note 17).

As of December 31, 2012, and 2011 the Company did not recognize any
impairment charge on property, plant and equipment.

2.6.4. Accounting for derivative financial
instruments

Derivative financial instruments are measured at fair value, determined as the amount of
cash to be collected or paid to settle the instrument as of the measurement date, net of any collected or paid monies.

Changes in the measurement of derivative financial instruments designated as effective cash flow hedges are recognized under Other comprehensive income in Equity. Changes in the
measurement of derivative financial instruments that do not qualify for hedge accounting or are not designated as hedges are recognized in the Consolidated Statement of Income under Financial results.

A hedge is considered effective when originally, as in the rest of life, its changes offset from eighty and a hundred
twenty five percent change in the opposite direction of the hedged item. In this regard, the Company excludes the specific component attributable to time value of an option in the measurement of the effectiveness of the instruments that qualify for
hedge accounting.

Hedge accounting must cease upon occurrence of any of the following events: (a) the
hedge instrument has matured or has been settled; (b) the hedging transaction is no longer effective; or (c) the forecast transaction does not have a high likelihood of occurrence. Income (loss) arising from the hedging instrument that
would have been allocated to Other comprehensive income should remain there until the committed or forecast transaction occurs, in the case of (a) and (b), and are charged to the Consolidated Statement of Income in the case of (c).

As of December 31, 2013, 2012 and January 1, 2012, the Company did not maintain derivative financial instruments,
and in these financial statements no significant charge to income is made for derivative operations in the years ended on such dates.

2.6.5. Equity accounts

The equity accounts, except
as noted in Retained earnings are presented pursuant to the previous accounting standards to the implementation of IFRS. The activity in the Equity accounts reflects resolutions adopted by Shareholders in their meetings, or the effects of the laws
or regulations in force.

Capital Stock

The capital stock consists of contributions made by shareholders represented by shares and capitalization of retained earnings, and comprises outstanding shares at their nominal value issued under
Argentine law.

Adjustment to capital stock

Capital stock accounts were restated in constant currency in accordance with previously applicable accounting standards in Argentina to the implementation of IFRS. The capital stock account was kept at
nominal value and the adjustment arising from such restatement is shown under Adjustment to capital stock.

Capital stock adjustment is not distributable in cash or in kind but may be capitalized through issuance of shares. In addition, this balance may be used to compensate accumulated losses in accordance
with the compensation method specified under Retained earnings.

Additional paid in capital from merger

This account was generated in January 2005 as a result of the merger of Eg3, PAR and Petrolera Santa Fe, whereby all
assets, liabilities, rights and obligations of the absorbed companies were included in the Companys equity and shares of the Company were issued based on the approved share exchange ratio.



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Additional paid-in capital on sales of stock of parent

The account additional paid-in capital on sales of stock of parent generated until 2010, as a result of the sale of shares
of the Company, with sales values greater than their acquisition costs.

During the third quarter of 2010 and
in compliance with the terms and conditions in section 220 of the LSC, the Company sold these treasury shares under the preemptive right provisions set forth in Sections 221 and 194 of the LSC, and subsequently transferred to Optimum Petrobras Trust
the remaining shares of the Company (Note 24.4).

Legal reserve

Pursuant to the provisions of the LSC, the Company is required to set up a legal reserve by providing at least 5% of the
aggregate amount of net income for the year, prior year adjustments, transfers of other comprehensive income to retained earnings and accumulated losses of prior years, when this aggregate amount exceeds zero until the legal reserve equals 20% of
the sum of Capital stock and Adjustment to capital stock balances.

Reserve for future investments

The Companys Shareholders Meeting allocates a specific amount to establish a special Reserve to develop the
Companys investment activities, which are focused on the oil and gas exploration and production business.

Future dividends reserve

It relates to the amount allocated by the Shareholders to set up a reserve for future dividends. In
addition, the Shareholders delegated on the Companys Board of Directors the determination of the date and amount of the dividend distribution until the following Shareholders Regular Meeting.

Other comprehensive income

It includes the gain/loss from the remeasurement of foreign operations, net of foreign exchange differences arising from the indebtedness of the Company denominated in foreign currency designated as hedge
of the net foreign investment, actuarial gains and losses for defined benefit plans and the related tax effect (Note 21.2)

Unappropriated
retained earnings

Until December 2012, the outstanding balance of retained earnings includes accumulated
gains or losses which were not allocated to a specific purpose reserve and, when positive, may be distributed pursuant to the decision of the Shareholders provided these retained earnings are not subject to legal restrictions, as mentioned under
Legal reserve.

This account therefore includes retained earnings carried forward from prior
years, amounts transferred from other comprehensive income and prior year adjustments resulting from the application of IFRS.

General Resolution N° 593/2011 issued by the CNV provided that Shareholders in the Meetings at which they should decide upon the approval of financial statements in which the Retained earnings account
has a positive balance, should adopt an express resolution as to the allocation of such balance, whether to dividend distribution, capitalization, setting up of reserves or a combination of these. The Companys Shareholders complied with these
requirements at their meeting held on March 29, 2012 (Note 20).

Distribution of dividends

The cash dividend is recognized as a liability in the PESAs financial statements in the year in which they are
approved by the shareholders of the Company.

Other items in Equity

The Other corresponds to the amount generated acquisition PELSA (note 13.5), operation defined as a business
combination of companies under common control, which affected earnings in (693), determined as the difference between the carrying amount of assets and liabilities at the date of the transaction and the amount paid. Total distributable retained
earnings are reduced by the balance of this item.



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2.6.6. Loans

Loans are initially recognized at fair value net of incurred transaction costs. Subsequently, they are carried at
amortized cost. Any difference between the proceeds (net of transaction costs) and redemption value is recognized in the Consolidated Statement of Income throughout the life of the loans using the effective interest method.

The loans are classified as current liabilities unless the Company has the right to defer settlement of the liability by
at least 12 months following the reporting date.

2.6.7. Labor costs liabilities

Labor costs liabilities are accrued in the periods in which the employees provide the services that trigger the
consideration.

The cost of defined contribution plans is periodically recognized in accordance with the
contributions made by Petrobras Argentina.

For purposes of determining the estimated cost of post-retirement
benefits granted to employees, the Company has used actuarial calculation methods, making estimates with respect to applicable demographic and financial variables. The amount recognized as liability attributable to such benefits represents the
addition of the present value of the obligation, net of the present value of the assets of the plan, with which the obligations will be settled.

Actuarial gains and losses are recognized on other comprehensive income and costs of services provided in the past in earnings.

2.6.8. Taxes payable

2.6.8.1. Income tax

Income tax expense for the year comprises current and deferred tax and is recognized in the Consolidated Statement of Income, except to the extent it relates to items recognized in the Consolidated
Statement of Comprehensive Income. In this case, the corresponding tax effect is also recognized in such statement.

The current income tax expense is calculated on the basis of the tax laws in force or in process of enactment at the reporting date in the countries where the Companys subsidiaries operate and
generate taxable income. The Companys management periodically evaluates criteria adopted in tax returns with respect to situations in which applicable tax regulation is subject to interpretation and sets up provisions where appropriate.

The Company accounts for the deferred tax balance using the liability method, which establishes the
determination of net deferred tax assets and liabilities on the basis of temporary differences between the accounting and tax measurement of assets and liabilities. Temporary differences result in the recognition of tax assets and liabilities when
their future reversal decreases or increases the taxes to be determined, without affecting the compensation of the pertinent amounts. The Company recognizes deferred tax assets if, and only if, it is considered probable that there will be sufficient
future taxable profit against which the tax loss could be used.

Deferred assets and liabilities are measured
at the tax rate that is expected to be applicable in the period when the asset will be realized or the liability settled, on the basis of the tax rates in force or in process of enactment at the reporting date.

Deferred tax assets and liabilities are offset by company if there is a legally enforceable right to set off tax assets
and liabilities and if the deferred income tax is related to the same tax authority.



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The deferred tax assets and liabilities are stated at their nominal value.

Income tax rates prevailing at year-end in Argentina, Venezuela, Ecuador, Bolivia and Spain are 35%, 50%, 22%, 25% and
30%, respectively. Additionally, payment of Bolivian-source income to beneficiaries outside Bolivia is levied with a 12.5% withholding income tax.

2.6.8.2. Minimum presumed income tax

In Argentina,
the minimum presumed income tax is supplementary to income tax, since while the latter is levied on the taxable income for the year, the minimum presumed income tax is a minimum tax levied on the potential income of certain productive assets at the
rate of 1%, so that the Companys final liability will be equal to the higher of both taxes. However, should the minimum presumed income tax exceed the calculated income tax in any given year, such excess may be applied to reduce any excess of
income tax over the minimum presumed income tax in any of the ten succeeding years.

In the years ended
December 31, 2013, 2012 and 2011, income tax expenses were higher than minimum presumed income tax. Therefore, the Company only recorded income tax expense.

2.6.8.3. Hydroelectric royalties

For the operation of Pichi Picún Leufú Hydroelectric Complex, the Company pays, since 2002, hydroelectric
royalties of 1%, increasing at a rate of 1% per year up to the maximum percentage of 12% of the amount resulting from applying the rate for the bulk sale to the power sold under the terms of Section No. 43 of Law No. 15,336, as
amended by Law No. 23,164. In addition, the Company is subject to a monthly license fee payable to the Federal Government for the use of the power source equivalent to 0.5% of the same basis used for the calculation of the hydroelectric
royalty.

2.6.8.4. Withholdings on exports of hydrocarbons

The Public Emergency and Exchange System Reform Law No. 25,561 established the creation of a system of withholdings
on exports of hydrocarbons for five years from March 1, 2002, which was subsequently extended for five years by Law No. 26,217. The effect of such withholdings is deducted from the respective selling prices.

Effective November 2007, Resolution No. 394/07 issued by the Ministry of the Economy and Production established a
new method for calculating withholdings on exports of crude oil, and gave equivalent treatment to certain oil related products as that of crude oil. This amendment results in the application of a variable export withholding based on a formula that
considers the international price of crude oil and a cut-off price by product. Under this method, when the international (quoted) price of crude oil exceeds US$ 60.90 per barrel, an increasing withholding rate is set for crude oil exports that
results in a price cap of US$ 42 per barrel of standard-quality crude oil. When the international price of crude oil ranges between US$ 45 and US$ 60.90 per barrel, a 45% withholding rate is applied. When the international price of crude
oil dips below US$ 45 per barrel, the regulations call for the authorities to determine a new applicable withholding rate within 90 days. The same rules apply to exports of refined products such as gasoline, fuel oil and lube oils, for which
different cut-off and reference prices were defined. On January 3, 2013 the Ministry of Economy and Public Finance, by order 01/2013, proceeded to modify the methodology for the calculation of taxes on exports of crude oil by increasing the
reference value at USD 80 per barrel and cutoff value to $ 70 per barrel.

In March 2008, the
Ministry of Economy and Production issued Resolution No.127/08 which, in connection with natural gas, amended Resolution No. 534/2006, whereby a 45% withholding rate was established on the price of the gas imported from Bolivia, and imposed a
100% withholding on natural gas exports, considering for valuation purposes the highest price set for natural gas under the applicable agreements for natural gas imports into Argentina. In addition, pursuant to such resolution, the methodology for
calculating withholdings on exports of crude oil was also applied to LPG.



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2.6.8.5. Foreign Exchange Regime  Obligation to exchange into local currency 100% of foreign
currency proceeds from exports of crude oil and oil related products

Decree N° 1,722/2010 dated
October 25, 2011 reinstated the obligation that all foreign currency proceeds from exports of crude oil and oil related products, natural gas and liquefied gas be negotiated in the local exchange market regulated by BCRA.

The decree therefore makes it mandatory for Petrobras Argentina to exchange into local currency 100% of the proceeds of
its exports of goods and services in Argentine.

2.6.8.6 New regulations for hydrocarbon activities in
Argentina.

Law No 26,741 passed in May 2012 declared of public interest and a state priority in
the Republic of Argentina the achievement of self-sufficiency in hydrocarbons supply and the activities of hydrocarbon exploration, exploitation, industrialization, transportation and marketing. In addition, YPF S.A.s and Repsol YPF Gas
S.A.s assets were declared of public interest and subject to expropriation in a fifty one per cent (51%).

By means of Decree No 1,277 passed in July 2012, the Argentine Executive Branch approved the regulations for the
implementation of Law No 26,741 and issued the Rules of the Argentine Hydrocarbon Sovereignty regime, which has established the creation of the Committee on Strategic Planning and Coordination of the National Plan is issued Hydrocarbon
Investment (the Commission) under the Ministry of Economic Development Policy and Planning of the Ministry of Economy and Finance, as well as the National Hydrocarbon Investment Register (the Register) . Decree
No. 1,277/12 established the obligation to the companies in the oil and gas industries from Argentina to present to the Commission an annual investment plan of exploration and exploitation. The Commission is required to design a Hydrocarbon
National Investment Plan, which seek to maximize investment and sustainability of the industry in the short, medium and long term. In addition, Decree No 1,277 also derogated certain sections of Decrees No 1,055/89, No 1,212/89 and
No 1,589/89 that provided for the free availability of hydrocarbons produced in concession areas granted, the free commercialization in the domestic and foreign markets and the freedom to set prices.

The Company has complied with all applicable reporting requirements.

In February 2013, by Resolution No. 1/2013, the Commission created the Incentive Program Injection Natural Gas
Surplus, in which companies can participate enrolled in the Register. Participation will be through the submission of projects to increase the total volume of natural gas to be injected into the domestic market during the proposed period. Once
the project is implemented, it provides: a) compensation for injection based on surplus at a price of 7.5 USD / MBTU and b) a fine in the case of the company during a specified period, has not managed to increase production volumes committed. In
order to develop gas fields in Argentina, the Company formalized presentations required for the qualification of Resolution No. 1/2013 and so far the Commission has not issued.

Additionally, in November 2013, by Resolution No. 60/2013, the Commission created the Stimulus Program
Injection Natural Gas for Business with Reduced injection. Producers have until March 31, 2014 to present their project to contribute to increase levels of natural gas production. The same is aimed at companies without previous
production, or capped at 3.5 MMm3/day, with price incentives before increases production, and LNG import penalties if the companies do not comply with the committed volumes. Also, those companies that were program beneficiaries mentioned in the
preceding paragraph and meet the conditions thereof, can request the termination of its participation in that program and its incorporation into the present.

2.6.9. Provisions

Accounting provisions are
recognized when: a) the Company has a present obligation (legal or assumed) as a result of a past event, b) it is probable that an outflow of resources will be required to settle that obligation, and c) can get a reliable estimate of the amount of
the obligation.

Provisions are measured at the present value of the expenditures expected to be required to
settle the obligation, taking into account the best available information at the time of preparation of the financial statements based on assumptions and methods considered appropriate. As additional information becomes available to the Company,
estimates are revised and adjusted periodically. The discount rate used to determine the present value reflects current market assessments at the balance sheet date, the time value of money and the specific risks associated with the particular
person.



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2.6.10. Basic and diluted earnings per share

Basic earnings per share are calculated by dividing the amount of income or loss attributable to Shareholders of the
Company by the weighted average number of ordinary shares outstanding during the year.

Since the Company does
not have preferred shares or debt convertible into shares, basic and diluted earnings per share are the same.

2.6.11. Revenue recognition

Revenues from the sale of crude oil, natural gas, petrochemical and refined products are recognized when the products are
delivered. Revenue is measured at the fair value of the consideration received or receivable taking into account the amount of any trade discounts and volume rebates allowed by the entity.

Revenue from the sale of goods is recognized when all the following conditions have been satisfied:



| | (a) | the entity has transferred to the buyer the significant risks and rewards of ownership of the goods;
| | --- | ----------------------------------------------------------------------------------------------------



| | (b) | the entity retains neither continuing managerial involvement to the degree usually associated with ownership nor effective control over the goods
sold;
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------



| | (c) | the amount of revenue can be measured reliably;
| | --- | -----------------------------------------------



| | (d) | it is probable that the economic benefits associated with the transaction will flow to the entity; and
| | --- | ------------------------------------------------------------------------------------------------------



| | (e) | the costs incurred or to be incurred in respect of the transaction can be measured reliably.
| | --- | --------------------------------------------------------------------------------------------

Revenues from oil and natural gas production in which the Company has a joint interest with other producers are
recognized on the basis of the net working interest, regardless of actual assignment. Any imbalance between actual and contractual assignment will result in the recognition of an amount payable or receivable according to the actual share in
production, whether above or below the production resulting from the Companys contractual interest in the consortium. As of December 31, 2013, 2012 and January 1, 2012 gas imbalance liabilities were 3, 4 and 6, respectively, attributable
to 47, 57 and 80 million cubic meters, respectively.

The Company performs diesel oil and gasoline sale
transactions with other refining companies in different geographical areas to optimize the logistics chain. These transactions are disclosed on a net basis in the Statement of Income.

Revenues from electricity generation are accounted for under the accrual method, including energy and power actually
delivered.

2.6.12. Discontinued operations

This category includes those operations which constitute a separate line of business or a geographic area of operations.

Therefore, operations related to those carried out and in Brazil (Note 18.2) were classified by the Company
as discontinued operations.

Where an operation is classified as discontinued, the comparative Consolidated
Statements of Income, of Comprehensive Income and of Cash Flows have been changed as if the operation had been discontinued as from the beginning of the comparative period.



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|3. | Critical accounting judgments and estimates
|-- | -------------------------------------------

The preparation of the financial statements in conformity with IFRS requires management to make judgements, estimates and
assumptions that affect the application of accounting policies and the reported amount of assets, liabilities, income and expenses. Actual results may differ from these estimates.

Estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognized
in the period in which the estimates are revised and in any future periods affected.

The most significant
estimates and assumptions are described below:

3.1. Oil and gas reserves

Reserves mean oil and gas volumes (in m3 of oil equivalent) that are economically producible, in the areas where the
Company operates or has a (direct or indirect) interest and over which the Company has exploitation rights, including oil and gas volumes related to those service agreements under which the Company has no ownership rights on the reserves or the
hydrocarbons obtained and those estimated to be produced for the contracting company under service contracts.

There are numerous uncertainties in estimating proved reserves and future production profiles, development costs and
prices, including several factors beyond the producers control. Reserve engineering is a subjective process of estimating underground accumulations involving a certain degree of uncertainty. Reserves estimates depend on the quality of the
available engineering and geological data as of the estimation date and on its interpretation and judgment.

Reserve estimates are adjusted when so justified by changes in the evaluation criteria or at least once a year. These
reserve estimates are based on the reports of oil and gas consulting professionals.

3.2. Provision for
well abandonment

Well abandonment liabilities when operations cease gives rise to the estimation of
time and amount of abandonment costs by Companys management. Technology, costs and political, environmental, safety and public relation considerations constantly change and may give rise to differences between actual future costs and
estimates.

3.3. Impairment of assets

For the purpose of assessing recoverability of non financial assets, assets are grouped at the lower levels for which
there are individually identifiable cash flows (cash generating units). For this purpose, each associated company and each jointly controlled company is considered a cash generating unit.

3.4. Contingencies

The Company is subject to various claims, lawsuits and other legal proceedings that arise during the ordinary course of
its business. The Companys liabilities with respect to such claims, lawsuits and other legal proceedings cannot be estimated with certainty. Periodically, the Companys Management reviews the status of each contingency and assesses
potential financial, applying the criteria indicated in note 2.6.9, for which elaborates the estimates mainly with the assistance of legal advisors.

Contingencies include outstanding lawsuits or claims for possible damages to third parties in the ordinary course of the Companys business, as well as third party claims arising from disputes
concerning the interpretation of legislation.

The Company evaluates whether there would be additional
expenses directly associated to the ultimate resolution of each contingency, which are to be included in the provision if they may be reasonably estimable. The Company evaluates whether there are incremental legal or other costs directly associated
with the ultimate resolution of the matter that are reasonably estimable and, if so, they are included in the accrual. If the assessment indicates that a potential loss contingency is not probable but is reasonably possible, or is probable but
cannot be estimated, then the nature of the contingent liability, together with an estimate of the possibility of occurrence, is disclosed in a note to the financial statements. Loss contingencies considered remote are not disclosed unless they
involve guarantees, in which case the nature of the guarantee is disclosed.



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3.5. Environmental costs

The costs incurred to limit, neutralize or prevent environmental pollution are only capitalized if at least one of the
following conditions is met: (a) such costs relate to improvements in safety; (b) the risk of environmental pollution is prevented or limited; or (c) the costs are incurred to prepare the assets for sale and the book value (which
considers those costs) of such assets does not exceed their respective recoverable value.

Liabilities related
to future remediation costs are recorded when, on the basis of environmental assessments, such liabilities are probable to materialize, and costs can be reasonably estimated. The actual recognition and amount of these provisions are generally based
on the Companys commitment to an action plan, such as an approved remediation plan or the sale or disposal of an asset. The provision is recognized on the basis that a future remediation commitment will be required.

The Company measures liabilities based on its best estimation of present value of future costs, using currently available
technology and applying current environmental laws and regulations as well as the Companys own internal environmental policies.

3.6. Employment benefit

For purposes of determining
the estimated cost of post-retirement benefits granted to employees, the Company has used actuarial estimates as indicated in note 24.



|4. | Financial and non financial equity risk management
|-- | --------------------------------------------------

4.1. Risk management objectives and policies

In performing its operations, the Company is exposed to a series of risks associated to the markets in which it operates.

The Company adopts an integrated risk management methodology, which is not focused on the individual risks of
the operations of its business units but on a wider monitoring of risks affecting its entire portfolio.

The
Companys risk management strategy, in line with its business integration strategy, seeks to achieve a balance between profitability goals and its exposure to risk.

The Company and its subsidiaries are not engaged in or trade in derivative financial instruments for speculative
purposes.

The Board of Directors establishes the policies for managing each of the risks set out below, which
have been applied consistently in the years included in these financial statements:

4.1.1. Financial
risk management

4.1.1.1. Exchange rate risks

The Companys results of operations and financial position are sensitive to changes in the exchange rate between the
Argentine Peso and certain foreign currencies.

The Company is mainly exposed to changes in the peso exchange
rate against the U.S. dollar. Petrobras Argentinas exposure to currencies other than the US dollar is not significant.

The Company has a net asset position in foreign currency because a significant portion of its debt is designated as hedges of investment in foreign currency, so the exchange differences generated by this
debt are recognized in Other comprehensive income.



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PETROBRAS ARGENTINA S.A.



The carrying amounts of assets and liabilities denominated in foreign currencies at the end of
each fiscal year under report, including designated debt coverage indicated above, are as follows:



Foreigncurrency andamount


Exchangerate


Book valuein 
localcurrencyCURRENT ASSETSCash and cash equivalents


USD



102



6.49



662Bol



1



1.03



1663Other investments


USD



0.5



6.49



3Trade receivables


USD



70.3



6.49



456EU



0.1



8.49



1457Other receivables


USD



121.6



6.49



789$
Bol



50.5



0.93



47Bol



35.9



1.03



37873TOTAL 2013



1,996TOTAL 2012



1,775TOTAL 01.01.2012



2,153NON-CURRENT ASSETSTrade receivables


USD



0.7704



6.49



5Other receivables


USD



6.3174



6.49



41Other investments


USD



38.4



6.49



249TOTAL 2013



295TOTAL 2012



225TOTAL 01.01.2012



1,024TOTAL ASSETS






2013







2,2912012







2,00001.01.2012







3,177


Foreigncurrency andamount


Exchangerate


Book valuein 
localcurrencyCURRENT LIABILITIESAccounts payable


USD



186.3



6.49



1209EU



2



8.49



17Bol



1



1.03



11,227Short-term debt


USD



31.1



6.49



202Payroll and social security taxes


USD



0.2



6.49



1Taxes payable


USD



7.2



6.49



47$
Bol



20.4



0.93



1966Provisions


USD



41



6.49



266TOTAL 2013



1,762TOTAL 2012



2,280TOTAL 01.01.2012



838NON CURRENT LIABILITIESAccounts payable


USD



1.1



6.49



7Long-term debt


USD



304.5



6.49



1,976Deferred income tax liabilities

$
Bol



8.6



0.93



8Provisions


USD



294.8



6.49



1913Bol



1.9



1.03



21,915TOTAL 2013



3,906TOTAL 2012



3,067TOTAL 01.01.2012



3,514TOTAL LIABILITIES






2013







5,6682012







5,34701.01.2012







4,352






|USD | Millons United States Dollars
|--- | -----------------------------

|$Bol | Millons Bolivian Pesos
|---- | ----------------------

|Bol | Millons Bolivares
|--- | -----------------

|EU | Millons Euros
|-- | -------------

During the year 2013, between the months of July and October, the Company used derivative financial instruments, which did not produce significant results.

As of December 31, 2012 and January 1, 2012, the Company was not engaged in any derivative financial instruments to
mitigate risks associated with exchange rate fluctuations.

Exchange rate sensitivity analysis

Considering the financial position at December 31, 2013, Management estimates that for every increase or decrease in
the exchange rate of 20% against the U.S. dollar would result in a profit or loss before tax of 160. Additionally, estimates an increase or decrease of 130 in line Other comprehensive income for the conversion of foreign operations, net
of debt designated as a hedge. This sensitivity analysis is not inherent foreign exchange risk.

Management
estimated, based on the financial position as of December 31, 2012 and January 1, 2012, that each P$0.10 increase or decrease in the exchange rate against the U.S. dollar would result in a gain or loss before taxes of 7 and 13 and a reduction
or increase in equity of 68 and 54, respectively.



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4.1.1.2. Interest rate risks

Management of interest rate risk aims at reducing financial costs and the Companys exposure to interest rate
increases.

As of December 31, 2013, 2012 and January 1, 2012 approximately 90%, 93% and 98%,
respectively, of our total financial debt was subject to fixed interest rates while the remaining portion was subject to variable interest rates. Information regarding the financing of the Company and related interest rates is included in Note 22.

During the years ended December 31, 2013, 2012 and 2011, Petrobras Argentina was not engaged in any
derivative financial instruments to mitigate the risks of interest rate fluctuations.

Interest rate sensitivity analysis

As of December 31, 2013, 2012 and January 1, 2012 the Companys debt subject to variable interest rates was 220,
189 and 54, respectively. Considering the low amount of debt in 2013, 2012 and January 1, 2012, the Company is not currently exposed to a significant cash flow risk as a consequence of interest rate fluctuations.

4.1.1.3. Liquidity risk

The liquidity risk relates to the Companys lack of sufficient funds to comply with all its economic, labor or business commitments.

The liquidity risk is associated with the Companys ability to finance its commitments and carry out its business
plans with stable sources of financing, as well as with the indebtedness level and the maturity profile of the financial debt.

The Company has a protection policy against liquidity risk. To such end, it maintains cash and cash equivalents, other liquid financial instruments and uncommitted credit lines in a sufficient amount to
pay out loans and other financial debts at maturity, in addition to maintaining an adequate balance between short and long term debt.

The Company has a funding policy that provides guidelines to avoid concentration in funding sources and credit counterparties.

The Company invests its cash in local and foreign financial institutions with adequate credit ratings. The Company
manages its liquidity in accordance with a policy approved by its Board of Directors. It also uses a methodology for the analysis and setting of credit limits when placing investments in different financial institutions and mutual funds in order to
minimize any associated credit risk.

Liquidity rate

The Companys liquidity ratio as of December 31, 2013, 2012 and January 1, 2012 is shown below:



|                    |  |      |       |  |      |  |       |            |  |  |       | 
|------------------- |  | ---- | ----- |  | ---- |  | ----- | ---------- |  |  | ----- | 
|                    |  | 2013 |       |  | 2012 |  |       | 01.01.2012 | 
|                    |  |      |      
|Current assets      |  |      | 6,596 |  |      |  | 6,024 |            |  |  | 5,124 | 
|                    |  |      |      
|Current liabilities |  |      | 4,028 |  |      |  | 4,342 |            |  |  | 2,632 | 
|                    |  |      |       |  |      |  |       |            |  |  |       | 
|Liquidity rate      |  |      | 1.64  |  |      |  | 1.39  |            |  |  | 1.95  | 
|                    |  |      |       |  |      |  |       |            |  |  |       | 



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Aging of financial liabilities

The tables below analyzes the Companys non-derivative financial liabilities and derivative financial liabilities into relevant maturity groupings based on the remaining period at the statement of
financial position to the contractual maturity date. The amounts disclosed in the table are the contractual undiscounted cash flows and as a result they do not reconcile to the amounts disclosed on the statement of financial position except for
short-term payables when discounting is not applied.



|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|----------------------------------------- |  | --------------- | ----- | --- | ---------------------------- |  | ------ | ----- |  |  | ----- |  |  |  | ------ | 
|                                          |  | 2013            |      
|                                          |  | Accountspayable |       |     | Otherscontractualcommitments |  |        | Loans |  |  | Total | 
|Liabilities                               |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total amount without any established term |  |                 |      |     |                              |  |       |       |  |  |      |  |  |  |       | 
|With established term:                    |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|- Due                                     |  |                 | 198   | (a) |                              |  |       |       |  |  |      |  |  |  | 198    | 
|To become due                             |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|- Up to one year                          |  |                 | 2,355 |     |                              |  | 10,057 |       |  |  | 308   |  |  |  | 12,720 | 
|- From one to three years                 |  |                 | 7     |     |                              |  | 2,478  |       |  |  | 310   |  |  |  | 2,795  | 
|- From three to five years                |  |                 |      |     |                              |  | 1,099  |       |  |  | 2,000 |  |  |  | 3,099  | 
|- Over five years                         |  |                 |      |     |                              |  | 8,085  |       |  |  |      |  |  |  | 8,085  | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total amount to become due                |  |                 | 2,362 |     |                              |  | 21,719 |       |  |  | 2,618 |  |  |  | 26,699 | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total amount with established term        |  |                 | 2,560 |     |                              |  | 21,719 |       |  |  | 2,618 |  |  |  | 26,897 | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total                                     |  |                 | 2,560 |     |                              |  | 21,719 |       |  |  | 2,618 |  |  |  | 26,897 | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 



| | (a) | Corresponds to less than three months.
| | --- | --------------------------------------



|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|----------------------------------------- |  | --------------- | ----- | --- | ---------------------------- |  | ------ | ----- |  |  | ----- |  |  |  | ------ | 
|                                          |  | 2012            |      
|                                          |  | Accountspayable |       |     | Otherscontractualcommitments |  |        | Loans |  |  | Total | 
|Liabilities                               |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total amount without any established term |  |                 | 165   |     |                              |  |       |       |  |  |      |  |  |  | 165    | 
|With established term:                    |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|- Due                                     |  |                 | 155   | (b) |                              |  |       |       |  |  |      |  |  |  | 155    | 
|To become due                             |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|- Up to one year                          |  |                 | 1,708 |     |                              |  | 4,787  |       |  |  | 1,183 |  |  |  | 7,678  | 
|- From one to three years                 |  |                 | 7     |     |                              |  | 3,230  |       |  |  | 262   |  |  |  | 3,499  | 
|- From three to five years                |  |                 |      |     |                              |  | 1,599  |       |  |  | 1,599 |  |  |  | 3,198  | 
|- Over five years                         |  |                 |      |     |                              |  | 5,440  |       |  |  |      |  |  |  | 5,440  | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total amount to become due                |  |                 | 1,715 |     |                              |  | 15,056 |       |  |  | 3,044 |  |  |  | 19,815 | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total amount with established term        |  |                 | 1,870 |     |                              |  | 15,056 |       |  |  | 3,044 |  |  |  | 19,970 | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 
|Total                                     |  |                 | 2,035 |     |                              |  | 15,056 |       |  |  | 3,044 |  |  |  | 20,135 | 
|                                          |  |                 |       |     |                              |  |        |       |  |  |       |  |  |  |        | 



| | (b) | Corresponds to less than three months.
| | --- | --------------------------------------



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|                                          |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 
|----------------------------------------- |  | --------------- | ----- | --- | ---------------------------- |  | ------ | --------- |  |  | ----- |  |  |  | ------ | 
|                                          |  | 01.01.2012      |      
|                                          |  | Accountspayable |       |     | Otherscontractualcommitments |  |        | Loans (d) |  |  | Total | 
|Liabilities                               |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 
|Total amount without any established term |  |                 | 188   |     |                              |  |       |           |  |  |      |  |  |  | 188    | 
|With established term:                    |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 
|- Due                                     |  |                 | 96    | (c) |                              |  |       |           |  |  |      |  |  |  | 96     | 
|To become due                             |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 
|- Up to one year                          |  |                 | 1,472 |     |                              |  | 3,696  |           |  |  | 40    |  |  |  | 5,208  | 
|- From one to three years                 |  |                 |      |     |                              |  | 2,108  |           |  |  | 889   |  |  |  | 2,997  | 
|- From three to five years                |  |                 |      |     |                              |  | 1,409  |           |  |  | 7     |  |  |  | 1,416  | 
|- Over five years                         |  |                 |      |     |                              |  | 5,033  |           |  |  | 1,286 |  |  |  | 6,319  | 
|                                          |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 
|Total amount to become due                |  |                 | 1,472 |     |                              |  | 12,246 |           |  |  | 2,222 |  |  |  | 15,940 | 
|                                          |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 
|Total amount with established term        |  |                 | 1,568 |     |                              |  | 12,246 |           |  |  | 2,222 |  |  |  | 16,036 | 
|                                          |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 
|Total                                     |  |                 | 1,756 |     |                              |  | 12,246 |           |  |  | 2,222 |  |  |  | 16,224 | 
|                                          |  |                 |       |     |                              |  |        |           |  |  |       |  |  |  |        | 



| | (c) | Corresponds to less than three months.
| | --- | --------------------------------------

| | (d) | Figures do not include unaccrued interests.
| | --- | -------------------------------------------

4.1.1.4. Credit risk

Credit risk represents the
exposure to possible losses derived from the lack of compliance by commercial or financial counterparties with the obligations assumed with the Company. This risk mainly results from economic and financial factors or from a possible default of
counterparty.

Credit risk is associated with trade receivables as well as with cash equivalents and cash in
banks and financial institutions.

The Company, in the normal course of business and according to its credit
policy, provides credit lines to a large client portfolio, in several industry sectors, including gas station operators, refiners, exporting companies, petrochemical companies, natural gas distribution companies, large electricity users and
distribution companies, among others.

The Company constantly performs credit evaluations of the financial
ability of its clients to minimize the potential risk of bad debt losses.

The allowance for bad debt
recognized by the Company represents its best estimate of probable losses in relation to trade receivables.

As of December 31, 2012 the Companys trade receivables amounted to 2,592, of which 97% was due within one year
and 4% was classified as non-current, and related to CAMMESA (an Argentine company engaged in buying electricity from power generation companies and selling it to distribution companies). Except for CAMMESA (which represents approximately 33% of
total trade receivables), the Company does not have a significant credit risk concentration, such exposure being fragmented into a large number of customers and other counterparties. No other customer concentrates a significant percentage of total
trade receivables.

Credit risk associated with cash and cash equivalents and other financial investments is
limited by the policy to operate only with counterparties (bank institutions) with adequate credit ratings. The Company also has a liquidity policy in place.

4.1.1.5. Capital management

The main purpose of the
Companys capital management is to maintain a good credit rating and safe debt-to-equity ratios in order to sustain the Companys business and maximize shareholders value.



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In addition, Petrobras Argentina seeks to maintain a cash generation level by its operating
activities to fund its investment plan and fulfill all its financial commitments. In the years ended December 31, 2013, 2012 and 2011, cash provided by operating activities amounted to 2.778, 2,902 and 1,695, respectively.

Debt-to-equity ratio:

The Companys debt-to-equity ratio at December 31, 2013, 2012 and January 1, 2012 is as follows:



|                     |  |      |        |  |      |  |        |            |  |  |        | 
|-------------------- |  | ---- | ------ |  | ---- |  | ------ | ---------- |  |  | ------ | 
|                     |  | 2013 |        |  | 2012 |  |        | 01.01.2012 | 
|                     |  |      |       
|Total liabilities    |  |      | 9,167  |  |      |  | 8,276  |            |  |  | 6,993  | 
|                     |  |      |       
|Equity               |  |      | 11,695 |  |      |  | 10,571 |            |  |  | 10,348 | 
|                     |  |      |        |  |      |  |        |            |  |  |        | 
|                     |  |      |       
|Debt-to-equity ratio |  |      | 0.78   |  |      |  | 0.78   |            |  |  | 0.68   | 
|                     |  |      |        |  |      |  |        |            |  |  |        | 

4.1.2. Non financial risk management

Commodity price risks

Petrobras Argentinas operations are affected by a number of factors which are beyond the Companys control, including the changes in the market price of its products, governmental regulations
on prices, taxes and other charges, royalties and other factors.

In Argentina, a series of regulations issued
during recent years, particularly focused on the energy sector and aimed at reducing the impact of inflationary pressures, have limited the possibility of changing the price of the Companys products.

As of December 31, 2013, 2012 and January 1, 2012, Petrobras Argentina did not use derivative financial instruments
to mitigate the risks associated with commodity price fluctuations.

4.2. Financial instruments by
category

As of December 31, 2013, 2012 and January 1, 2012, the categories of financial
instruments were as follows:



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|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|----------------------------- |  | ------------------------------------------ | --- |  | ------------------------------ |  | --- | -------------------- |  |  | ----- |  |  |  | ----- | 
|                              |  | 2013                                       |    
|                              |  | Financialassets atfair valuethroughresults |     |  | Financialassetsheld tomaturity |  |     | Loans andreceivables |  |  | Total | 
|CURRENT ASSETS                |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Cash and cash equivalents     |  |                                            | 846 |  |                                |  | 231 |                      |  |  | 116   |  |  |  | 1,193 | 
|Other investments             |  |                                            |    |  |                                |  |    |                      |  |  | 23    |  |  |  | 23    | 
|Trade receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 2,519 |  |  |  | 2,519 | 
|Other receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 1,187 |  |  |  | 1,187 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total current assets          |  |                                            | 846 |  |                                |  | 231 |                      |  |  | 3,845 |  |  |  | 4,922 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|                              |  |                                            |     | 
|NON-CURRENT ASSETS            |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Trade receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 73    |  |  |  | 73    | 
|Other receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 166   |  |  |  | 166   | 
|Other investments             |  |                                            |    |  |                                |  | 128 |                      |  |  | 173   |  |  |  | 301   | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total non-current assets      |  |                                            |    |  |                                |  | 128 |                      |  |  | 412   |  |  |  | 540   | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total assets                  |  |                                            | 846 |  |                                |  | 359 |                      |  |  | 4,257 |  |  |  | 5,462 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|                              |  |                                            |     | 
|CURRENT LIABILITIES           |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Accounts payable              |  |                                            |    |  |                                |  |    |                      |  |  | 2,553 |  |  |  | 2,553 | 
|Short-term loans              |  |                                            |    |  |                                |  |    |                      |  |  | 208   |  |  |  | 208   | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total current liabilities     |  |                                            |    |  |                                |  |    |                      |  |  | 2,761 |  |  |  | 2,761 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|                              |  |                                            |     | 
|NON-CURRENT LIABILITIES       |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Accounts payable              |  |                                            |    |  |                                |  |    |                      |  |  | 7     |  |  |  | 7     | 
|Long-term loans               |  |                                            |    |  |                                |  |    |                      |  |  | 2,024 |  |  |  | 2,024 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total non-current liabilities |  |                                            |    |  |                                |  |    |                      |  |  | 2,031 |  |  |  | 2,031 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total liabilities             |  |                                            |    |  |                                |  |    |                      |  |  | 4,792 |  |  |  | 4,792 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 



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|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|----------------------------- |  | ------------------------------------------ | --- |  | ------------------------------ |  | --- | -------------------- |  |  | ----- |  |  |  | ----- | 
|                              |  | 2012                                       |    
|                              |  | Financialassets atfair valuethroughresults |     |  | Financialassetsheld tomaturity |  |     | Loans andreceivables |  |  | Total | 
|CURRENT ASSETS                |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Cash and cash equivalents     |  |                                            | 331 |  |                                |  | 773 |                      |  |  | 156   |  |  |  | 1,260 | 
|Other investments             |  |                                            |    |  |                                |  |    |                      |  |  | 20    |  |  |  | 20    | 
|Trade receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 2,168 |  |  |  | 2,168 | 
|Other receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 1,189 |  |  |  | 1,189 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total current assets          |  |                                            | 331 |  |                                |  | 773 |                      |  |  | 3,533 |  |  |  | 4,637 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|NON-CURRENT ASSETS            |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Trade receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 86    |  |  |  | 86    | 
|Other receivables             |  |                                            |    |  |                                |  |    |                      |  |  | 159   |  |  |  | 159   | 
|Other investments             |  |                                            |    |  |                                |  | 98  |                      |  |  | 181   |  |  |  | 279   | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|                              |  |                                            |     | 
|Total non-current assets      |  |                                            |    |  |                                |  | 98  |                      |  |  | 426   |  |  |  | 524   | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|                              |  |                                            |     | 
|Total assets                  |  |                                            | 331 |  |                                |  | 871 |                      |  |  | 3,959 |  |  |  | 5,161 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|CURRENT LIABILITIES           |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Accounts payable              |  |                                            |    |  |                                |  |    |                      |  |  | 1,863 |  |  |  | 1,863 | 
|Short-term loans              |  |                                            |    |  |                                |  |    |                      |  |  | 1,108 |  |  |  | 1,108 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total current liabilities     |  |                                            |    |  |                                |  |    |                      |  |  | 2,971 |  |  |  | 2,971 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|NON-CURRENT LIABILITIES       |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Accounts payable              |  |                                            |    |  |                                |  |    |                      |  |  | 172   |  |  |  | 172   | 
|Long-term loans               |  |                                            |    |  |                                |  |    |                      |  |  | 1,558 |  |  |  | 1,558 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total non-current liabilities |  |                                            |    |  |                                |  |    |                      |  |  | 1,730 |  |  |  | 1,730 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 
|Total liabilities             |  |                                            |    |  |                                |  |    |                      |  |  | 4,701 |  |  |  | 4,701 | 
|                              |  |                                            |     |  |                                |  |     |                      |  |  |       |  |  |  |       | 



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|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|----------------------------- |  | ------------------------------------------ | -- |  | ------------------------------ |  | ----- | -------------------- |  |  | ----- |  |  |  | ----- | 
|                              |  | 01.01.2012                                 |   
|                              |  | Financialassets atfair valuethroughresults |    |  | Financialassetsheld tomaturity |  |       | Loans andreceivables |  |  | Total | 
|CURRENT ASSETS                |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Cash and cash equivalents     |  |                                            | 46 |  |                                |  | 1,061 |                      |  |  | 85    |  |  |  | 1,192 | 
|Other investments             |  |                                            |   |  |                                |  |      |                      |  |  | 21    |  |  |  | 21    | 
|Trade receivables             |  |                                            |   |  |                                |  |      |                      |  |  | 1,871 |  |  |  | 1,871 | 
|Other receivables             |  |                                            |   |  |                                |  |      |                      |  |  | 766   |  |  |  | 766   | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Total current assets          |  |                                            | 46 |  |                                |  | 1,061 |                      |  |  | 2,743 |  |  |  | 3,850 | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|NON-CURRENT ASSETS            |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Trade receivables             |  |                                            |   |  |                                |  |      |                      |  |  | 211   |  |  |  | 211   | 
|Other receivables             |  |                                            |   |  |                                |  |      |                      |  |  | 863   |  |  |  | 863   | 
|Other investments             |  |                                            |   |  |                                |  | 148   |                      |  |  | 200   |  |  |  | 348   | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Total non-current assets      |  |                                            |   |  |                                |  | 148   |                      |  |  | 1,274 |  |  |  | 1,422 | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Total assets                  |  |                                            | 46 |  |                                |  | 1,209 |                      |  |  | 4,017 |  |  |  | 5,272 | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|CURRENT LIABILITIES           |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Accounts payable              |  |                                            |   |  |                                |  |      |                      |  |  | 1,572 |  |  |  | 1,572 | 
|Short-term loans              |  |                                            |   |  |                                |  |      |                      |  |  | 40    |  |  |  | 40    | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Total current liabilities     |  |                                            |   |  |                                |  |      |                      |  |  | 1,612 |  |  |  | 1,612 | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|NON-CURRENT LIABILITIES       |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Accounts payable              |  |                                            |   |  |                                |  |      |                      |  |  | 184   |  |  |  | 184   | 
|Long-term loans               |  |                                            |   |  |                                |  |      |                      |  |  | 2,182 |  |  |  | 2,182 | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Total non-current liabilities |  |                                            |   |  |                                |  |      |                      |  |  | 2,366 |  |  |  | 2,366 | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 
|Total liabilities             |  |                                            |   |  |                                |  |      |                      |  |  | 3,978 |  |  |  | 3,978 | 
|                              |  |                                            |    |  |                                |  |       |                      |  |  |       |  |  |  |       | 

4.3. Fair value of financial instruments

The methods and assumptions used to determine the estimated fair value of each class of financial instrument are as
follows:



| |  |  | The carrying amount of cash, cash equivalents, accounts receivable and short-term debt are similar to their fair value because of the short-term
maturity of these items.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The fair value of investments in mutual funds was estimated on the basis of quoted market prices as of the reporting dates for identical assets in
active markets and accordingly this fair value estimate was categorized as Level 1.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The fair value of publicly offered long-term debt obligations was estimated on the basis of quoted market prices for such debt obligations as of the
reporting dates while for the rest of the long-term debt obligations, fair value was estimated on the basis of interest rates currently available to the Company for debt obligations with similar maturities.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The estimated fair value of long-term loans as of December 31, 2013, 2012 and January 1, 2012, valued at amortized
cost, except for financial instruments whose book values above approximate fair values, are as follows:



|                |  |      |       |  |      |  |       |            |  |  |       | 
|--------------- |  | ---- | ----- |  | ---- |  | ----- | ---------- |  |  | ----- | 
|Long-term loans |  | 2013 |       |  | 2012 |  |       | 01.01.2012 | 
|                |  |      |      
|Book value      |  |      | 2,024 |  |      |  | 1,558 |            |  |  | 2,182 | 
|                |  |      |      
|Fair value      |  |      | 2,281 |  |      |  | 1,630 |            |  |  | 2,421 | 



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4.4. Fair Value by hierarchy levels

Fair value is a market-based measurement based on assumptions that market participants would use in pricing the asset or
liability. The Company uses the following three-tier fair value hierarchy which prioritizes the inputs observables used to measure fair value:



| |  |  | Level 1: Observable inputs such as quoted prices in active markets;
| | - |  | -------------------------------------------------------------------



| |  |  | Level 2: Inputs other than quoted prices in active markets that are observable either directly or indirectly; and
| | - |  | -----------------------------------------------------------------------------------------------------------------



| |  |  | Level 3: Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------

If one or more significant inputs were not based on observable market data, related
financial instruments are included in Level 3.



|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|------------------------- |  | ---------- | --- |  | ------- |  | - | ------- |  |  | ----- |  |  |  | --- | 
|                          |  | 2013       |    
|                          |  | Level 1    |     |  | Level 2 |  |   | level 3 |  |  | Total | 
|CURRENT ASSETS            |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Cash and cash equivalents |  |            | 846 |  |         |  |  |         |  |  |      |  |  |  | 846 | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Total current assets      |  |            | 846 |  |         |  |  |         |  |  |      |  |  |  | 846 | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Total assets              |  |            | 846 |  |         |  |  |         |  |  |      |  |  |  | 846 | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|                          |  |            |     | 
|Total liabilities         |  |            |    |  |         |  |  |         |  |  |      |  |  |  |    | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|                          | 
|                          |  | 2012       |    
|                          |  | Level 1    |     |  | Level 2 |  |   | level 3 |  |  | Total | 
|Other receivables         |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Cash and cash equivalents |  |            | 331 |  |         |  |  |         |  |  |      |  |  |  | 331 | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Total current assets      |  |            | 331 |  |         |  |  |         |  |  |      |  |  |  | 331 | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Total assets              |  |            | 331 |  |         |  |  |         |  |  |      |  |  |  | 331 | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|                          |  |            |     | 
|Total liabilities         |  |            |    |  |         |  |  |         |  |  |      |  |  |  |    | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|                          | 
|                          |  | 01.01.2012 |    
|                          |  | Level 1    |     |  | Level 2 |  |   | level 3 |  |  | Total | 
|Capital Stock             |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Cash and cash equivalents |  |            | 46  |  |         |  |  |         |  |  |      |  |  |  | 46  | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Total current assets      |  |            | 46  |  |         |  |  |         |  |  |      |  |  |  | 46  | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|Total assets              |  |            | 46  |  |         |  |  |         |  |  |      |  |  |  | 46  | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 
|                          |  |            |     | 
|Total liabilities         |  |            |    |  |         |  |  |         |  |  |      |  |  |  |    | 
|                          |  |            |     |  |         |  |   |         |  |  |       |  |  |  |     | 



|5. | Information by segments
|-- | -----------------------

The Company prepares this information based on business segment criteria and also prepares relevant information by geographical area.



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PETROBRAS ARGENTINA S.A.



5.1. Business segments:

The business segments were defined according to the regular way in which management analyzes information in decision
making, applying IFRSs accounting policies. Transactions between business segments are conducted during the ordinary course of business at market terms and prices. The terms and conditions of these transactions are comparable to those offered
by or obtained from non-related parties.

Below is detailed information on each business segment identified by
the Companys Management:



|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|------------------------------------------- |  | ----------------------------------- | ------ |  | ----------------------- |  | ----- | -------------- |  |  | ------------ |  |  | ------------------------------ | ----- |  | ----- |  | ----- | - |  |  | ------ | 
|                                            |  | 2013                                |       
|                                            |  | Oil and GasExplorationandProduction |        |  | RefiningandDistribution |  |       | Petrochemicals |  |  | GasandEnergy |  |  | CorporateOther andEliminations |       |  | Total | 
|                                            |  |                                     |        |  |                         | 
|Current assets                              |  |                                     | 2,468  |  |                         |  | 1,784 |                |  |  | 991          |  |  |                                | 1,382 |  |       |  | (29   | ) |  |  | 6,596  | 
|Investment in companies under joint control |  |                                     |       |  |                         |  |      |                |  |  |             |  |  |                                | 497   |  |       |  |      |   |  |  | 497    | 
|Investments in associates                   |  |                                     | 3,376  |  |                         |  | 192   |                |  |  |             |  |  |                                |      |  |       |  |      |   |  |  | 3,568  | 
|Other Investments                           |  |                                     | 109    |  |                         |  |      |                |  |  |             |  |  |                                | 64    |  |       |  | 128   |   |  |  | 301    | 
|Property, plant and equipment               |  |                                     | 7,105  |  |                         |  | 1,213 |                |  |  | 458          |  |  |                                | 641   |  |       |  | 107   |   |  |  | 9,524  | 
|Non-current other assets                    |  |                                     | 92     |  |                         |  | 51    |                |  |  | 41           |  |  |                                | 159   |  |       |  | 33    |   |  |  | 376    | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|Total assets                                |  |                                     | 13,150 |  |                         |  | 3,240 |                |  |  | 1,490        |  |  |                                | 2,743 |  |       |  | 239   |   |  |  | 20,862 | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|                                            |  |                                     |        |  |                         | 
|Total liabilities                           |  |                                     | 4,889  |  |                         |  | 2,233 |                |  |  | 574          |  |  |                                | 603   |  |       |  | 868   |   |  |  | 9,167  | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|                                            | 
|                                            |  | 2012                                |       
|                                            |  | Oil and GasExplorationandProduction |        |  | RefiningandDistribution |  |       | Petrochemicals |  |  | GasandEnergy |  |  | CorporateOther andEliminations |       |  | Total | 
|                                            |  |                                     |        |  |                         | 
|Current assets                              |  |                                     | 1,925  |  |                         |  | 1,252 |                |  |  | 786          |  |  |                                | 1,251 |  |       |  | 810   |   |  |  | 6,024  | 
|Investment in companies under joint control |  |                                     |       |  |                         |  |      |                |  |  |             |  |  |                                | 689   |  |       |  |      |   |  |  | 689    | 
|Investments in associates                   |  |                                     | 2,847  |  |                         |  | 159   |                |  |  |             |  |  |                                |      |  |       |  |      |   |  |  | 3,006  | 
|Other Investments                           |  |                                     | 99     |  |                         |  |      |                |  |  |             |  |  |                                | 82    |  |       |  | 98    |   |  |  | 279    | 
|Property, plant and equipment               |  |                                     | 6,067  |  |                         |  | 1,196 |                |  |  | 389          |  |  |                                | 732   |  |       |  | 96    |   |  |  | 8,480  | 
|Non-current other assets                    |  |                                     | 110    |  |                         |  | 51    |                |  |  | 42           |  |  |                                | 140   |  |       |  | 26    |   |  |  | 369    | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|Total assets                                |  |                                     | 11,048 |  |                         |  | 2,658 |                |  |  | 1,217        |  |  |                                | 2,894 |  |       |  | 1,030 |   |  |  | 18,847 | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|                                            |  |                                     |        |  |                         | 
|Total liabilities                           |  |                                     | 3,867  |  |                         |  | 1,563 |                |  |  | 344          |  |  |                                | 578   |  |       |  | 1,924 |   |  |  | 8,276  | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|                                            | 
|                                            |  | 01.01.2012                          |       
|                                            |  | Oil and GasExplorationandProduction |        |  | RefiningandDistribution |  |       | Petrochemicals |  |  | GasandEnergy |  |  | CorporateOther andEliminations |       |  | Total | 
|                                            |  |                                     |        |  |                         | 
|Current assets                              |  |                                     | 1,221  |  |                         |  | 1,949 |                |  |  | 517          |  |  |                                | 956   |  |       |  | 481   |   |  |  | 5,124  | 
|Investment in companies under joint control |  |                                     |       |  |                         |  |      |                |  |  |             |  |  |                                | 724   |  |       |  |      |   |  |  | 724    | 
|Investments in associates                   |  |                                     | 2,795  |  |                         |  | 148   |                |  |  |             |  |  |                                |      |  |       |  |      |   |  |  | 2,943  | 
|Other Investments                           |  |                                     | 102    |  |                         |  |      |                |  |  |             |  |  |                                | 106   |  |       |  | 140   |   |  |  | 348    | 
|Property, plant and equipment               |  |                                     | 4,712  |  |                         |  | 1,163 |                |  |  | 271          |  |  |                                | 814   |  |       |  | 96    |   |  |  | 7,056  | 
|Non-current other assets                    |  |                                     | 344    |  |                         |  | 56    |                |  |  | 22           |  |  |                                | 225   |  |       |  | 499   |   |  |  | 1,146  | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|Total assets                                |  |                                     | 9,174  |  |                         |  | 3,316 |                |  |  | 810          |  |  |                                | 2,825 |  |       |  | 1,216 |   |  |  | 17,341 | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 
|                                            |  |                                     |        |  |                         | 
|Total liabilities                           |  |                                     | 2,743  |  |                         |  | 1,893 |                |  |  | 235          |  |  |                                | 489   |  |       |  | 1,633 |   |  |  | 6,993  | 
|                                            |  |                                     |        |  |                         |  |       |                |  |  |              |  |  |                                |       |  |       |  |       |   |  |  |        | 



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PETROBRAS ARGENTINA S.A.





|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  
|--------------------------------------------- |  | ----------------------------------- | ------ | - | ----------------------- |  | ------ | -------------- |  |  | ------------ | - |  | ------------------------------ | ------ | - | ----- |  | ------ | - |  |  | ------- | -
|                                              |  | 2013                                |       
|                                              |  | Oil and GasExplorationandProduction |        |   | RefiningandDistribution |  |        | Petrochemicals |  |  | GasandEnergy |   |  | CorporateOther andEliminations |        |   | Total | 
|Consolidated Statement of Income              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  
|                                              |  |                                     |        |   |                         | 
|Sales                                         |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  
|To third parties                              |  |                                     | 1,814  |   |                         |  | 7,845  |                |  |  | 3,177        |   |  |                                | 2,504  |   |       |  |       |   |  |  | 15,340  |  
|Inter-segment                                 |  |                                     | 6,024  |   |                         |  | 301    |                |  |  | 171          |   |  |                                | 200    |   |       |  | (6,696 | ) |  |  |        |  
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  
|                                              |  |                                     | 7,838  |   |                         |  | 8,146  |                |  |  | 3,348        |   |  |                                | 2,704  |   |       |  | (6,696 | ) |  |  | 15,340  |  
|Cost of sales                                 |  |                                     | (5,501 | ) |                         |  | (7,352 | )              |  |  | (2,827       | ) |  |                                | (2,218 | ) |       |  | 6,638  |   |  |  | (11,260 | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  
|Gross profit                                  |  |                                     | 2,337  |   |                         |  | 794    |                |  |  | 521          |   |  |                                | 486    |   |       |  | (58    | ) |  |  | 4,080   |  
|                                              |  |                                     |        |   |                         | 
|Administrative and selling expenses           |  |                                     | (350   | ) |                         |  | (728   | )              |  |  | (155         | ) |  |                                | (98    | ) |       |  | (466   | ) |  |  | (1,797  | )
|Exploration expenses                          |  |                                     | (82    | ) |                         |  |       |                |  |  |             |   |  |                                |       |   |       |  |       |   |  |  | (82     | )
|Other operating (expenses) income, net        |  |                                     | (227   | ) |                         |  | 106    |                |  |  | (60          | ) |  |                                | (3     | ) |       |  | (387   | ) |  |  | (571    | )
|Share of profit of equity accounted investees |  |                                     | (336   | ) |                         |  | 44     |                |  |  |             |   |  |                                | 13     |   |       |  |       |   |  |  | (279    | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  
|Operating income (loss)                       |  |                                     | 1,342  |   |                         |  | 216    |                |  |  | 306          |   |  |                                | 398    |   |       |  | (911   | ) |  |  | 1,351   |  
|                                              |  |                                     |        |   |                         | 
|Interest income                               |  |                                     | 54     |   |                         |  | 3      |                |  |  |             |   |  |                                | 18     |   |       |  | 125    |   |  |  | 200     |  
|Interest expense                              |  |                                     | (72    | ) |                         |  | (20    | )              |  |  |             |   |  |                                | (10    | ) |       |  | (167   | ) |  |  | (269    | )
|Other financial results                       |  |                                     | (211   | ) |                         |  | (94    | )              |  |  | (10          | ) |  |                                | 26     |   |       |  | 411    |   |  |  | 122     |  
|Income tax                                    |  |                                     | (270   | ) |                         |  | (17    | )              |  |  |             |   |  |                                |       |   |       |  | (265   | ) |  |  | (552    | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  
|                                              |  |                                     |        |   |                         | 
|Net income (loss)                             |  |                                     | 843    |   |                         |  | 88     |                |  |  | 296          |   |  |                                | 432    |   |       |  | (807   | ) |  |  | 852     |  
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |         |  



|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|--------------------------------------------- |  | ----------------------------------- | ------ | - | ----------------------- |  | ------ | -------------- |  |  | ------------ | - |  | ------------------------------ | ------ | - | ----- |  | ------ | - |  |  | ------ | -
|                                              |  | 2012                                |       
|                                              |  | Oil and GasExplorationandProduction |        |   | RefiningandDistribution |  |        | Petrochemicals |  |  | GasandEnergy |   |  | CorporateOther andEliminations |        |   | Total | 
|Consolidated Statement of Income              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|                                              |  |                                     |        |   |                         | 
|Sales                                         |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|To third parties                              |  |                                     | 1,042  |   |                         |  | 6,654  |                |  |  | 2,713        |   |  |                                | 2,356  |   |       |  |       |   |  |  | 12,765 |  
|Inter-segment                                 |  |                                     | 5,071  |   |                         |  | 303    |                |  |  | 194          |   |  |                                | 166    |   |       |  | (5,734 | ) |  |  |       |  
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|                                              |  |                                     | 6,113  |   |                         |  | 6,957  |                |  |  | 2,907        |   |  |                                | 2,522  |   |       |  | (5,734 | ) |  |  | 12,765 |  
|Cost of sales                                 |  |                                     | (4,246 | ) |                         |  | (6,384 | )              |  |  | (2,683       | ) |  |                                | (2,089 | ) |       |  | 5,783  |   |  |  | (9,619 | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|Gross profit                                  |  |                                     | 1,867  |   |                         |  | 573    |                |  |  | 224          |   |  |                                | 433    |   |       |  | 49     |   |  |  | 3,146  |  
|                                              |  |                                     |        |   |                         | 
|Administrative and selling expenses           |  |                                     | (263   | ) |                         |  | (585   | )              |  |  | (110         | ) |  |                                | (76    | ) |       |  | (396   | ) |  |  | (1,430 | )
|Exploration expenses                          |  |                                     | (212   | ) |                         |  |       |                |  |  |             |   |  |                                |       |   |       |  |       |   |  |  | (212   | )
|Other operating (expenses) income, net        |  |                                     | (194   | ) |                         |  | 13     |                |  |  | 38           |   |  |                                | 224    |   |       |  | (202   | ) |  |  | (121   | )
|Share of profit of equity accounted investees |  |                                     | (126   | ) |                         |  | 11     |                |  |  |             |   |  |                                | (33    | ) |       |  |       |   |  |  | (148   | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|Operating income (loss)                       |  |                                     | 1,072  |   |                         |  | 12     |                |  |  | 152          |   |  |                                | 548    |   |       |  | (549   | ) |  |  | 1,235  |  
|                                              |  |                                     |        |   |                         | 
|Interest income                               |  |                                     | 46     |   |                         |  |       |                |  |  |             |   |  |                                | 23     |   |       |  | 64     |   |  |  | 133    |  
|Interest expense                              |  |                                     | (55    | ) |                         |  | (19    | )              |  |  | (2           | ) |  |                                | (8     | ) |       |  | (163   | ) |  |  | (247   | )
|Other financial results                       |  |                                     | (193   | ) |                         |  | (27    | )              |  |  | (8           | ) |  |                                | 32     |   |       |  | 240    |   |  |  | 44     |  
|Income tax                                    |  |                                     | (120   | ) |                         |  | (19    | )              |  |  |             |   |  |                                | (3     | ) |       |  | (350   | ) |  |  | (492   | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|                                              |  |                                     |        |   |                         | 
|Net income (loss)                             |  |                                     | 750    |   |                         |  | (53    | )              |  |  | 142          |   |  |                                | 592    |   |       |  | (758   | ) |  |  | 673    |  
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  



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PETROBRAS ARGENTINA S.A.





|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|--------------------------------------------- |  | ----------------------------------- | ------ | - | ----------------------- |  | ------ | -------------- |  |  | ------------ | - |  | ------------------------------ | ------ | - | ----- |  | ------ | - |  |  | ------ | -
|                                              |  | 2011                                |       
|                                              |  | Oil and GasExplorationandProduction |        |   | RefiningandDistribution |  |        | Petrochemicals |  |  | GasandEnergy |   |  | CorporateOther andEliminations |        |   | Total | 
|Consolidated Statement of Income              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|                                              |  |                                     |        |   |                         | 
|Sales                                         |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|To third parties                              |  |                                     | 176    |   |                         |  | 7,039  |                |  |  | 1,705        |   |  |                                | 2,184  |   |       |  |       |   |  |  | 11,104 |  
|Inter-segment                                 |  |                                     | 3,968  |   |                         |  | 312    |                |  |  | 98           |   |  |                                | 152    |   |       |  | (4,530 | ) |  |  |       |  
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|                                              |  |                                     | 4,144  |   |                         |  | 7,351  |                |  |  | 1,803        |   |  |                                | 2,336  |   |       |  | (4,530 | ) |  |  | 11,104 |  
|Cost of sales                                 |  |                                     | (2,982 | ) |                         |  | (6,619 | )              |  |  | (1,562       | ) |  |                                | (1,769 | ) |       |  | 4,470  |   |  |  | (8,462 | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|Gross profit                                  |  |                                     | 1,162  |   |                         |  | 732    |                |  |  | 241          |   |  |                                | 567    |   |       |  | (60    | ) |  |  | 2,642  |  
|                                              |  |                                     |        |   |                         | 
|Administrative and selling expenses           |  |                                     | (183   | ) |                         |  | (532   | )              |  |  | (81          | ) |  |                                | (59    | ) |       |  | (367   | ) |  |  | (1,222 | )
|Exploration expenses                          |  |                                     | (391   | ) |                         |  |       |                |  |  |             |   |  |                                |       |   |       |  |       |   |  |  | (391   | )
|Other operating (expenses) income, net        |  |                                     | (565   | ) |                         |  | (22    | )              |  |  | (27          | ) |  |                                | 38     |   |       |  | (255   | ) |  |  | (831   | )
|Share of profit of equity accounted investees |  |                                     | (136   | ) |                         |  | 67     |                |  |  |             |   |  |                                | 33     |   |       |  |       |   |  |  | (36    | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|Operating income (loss)                       |  |                                     | (113   | ) |                         |  | 245    |                |  |  | 133          |   |  |                                | 579    |   |       |  | (682   | ) |  |  | 162    |  
|                                              |  |                                     |        |   |                         | 
|Interest income                               |  |                                     | 18     |   |                         |  | 7      |                |  |  |             |   |  |                                | 31     |   |       |  | 37     |   |  |  | 93     |  
|Interest expense                              |  |                                     | (44    | ) |                         |  | (20    | )              |  |  | (1           | ) |  |                                | (6     | ) |       |  | (182   | ) |  |  | (253   | )
|Other financial results                       |  |                                     | (60    | ) |                         |  | (62    | )              |  |  | (79          | ) |  |                                | (15    | ) |       |  | 200    |   |  |  | (16    | )
|Income tax                                    |  |                                     | (18    | ) |                         |  | (15    | )              |  |  | 88           |   |  |                                | (1     | ) |       |  | (69    | ) |  |  | (15    | )
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|                                              |  |                                     |        |   |                         | 
|Net (loss) income continued operations        |  |                                     | (217   | ) |                         |  | 155    |                |  |  | 141          |   |  |                                | 588    |   |       |  | (696   | ) |  |  | (29    | )
|                                              |  |                                     |        |   |                         | 
|Net income discontinued operations            |  |                                     |       |   |                         |  |       |                |  |  | 706          |   |  |                                |       |   |       |  |       |   |  |  | 706    |  
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  
|Net income (loss)                             |  |                                     | (217   | ) |                         |  | 155    |                |  |  | 847          |   |  |                                | 588    |   |       |  | (696   | ) |  |  | 677    |  
|                                              |  |                                     |        |   |                         |  |        |                |  |  |              |   |  |                                |        |   |       |  |        |   |  |  |        |  



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PETROBRAS ARGENTINA S.A.



Other relevant information



|                                                           |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|---------------------------------------------------------- |  | ----------------------------------- | ----- |  | ----------------------- |  | --- | -------------- |  |  | ------------ |  |  | ------------------------------ | -- |  | ----- |  | -- |  |  |  | ----- | 
|                                                           |  | 2013                                |      
|                                                           |  | Oil and GasExplorationandProduction |       |  | RefiningandDistribution |  |     | Petrochemicals |  |  | GasandEnergy |  |  | CorporateOther andEliminations |    |  | Total | 
|Additions of property, plant and equipment                 |  |                                     | 2,437 |  |                         |  | 164 |                |  |  | 102          |  |  |                                | 9  |  |       |  | 29 |  |  |  | 2,741 | 
|                                                           |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|Depreciation of property, plant and equipment uncluded in: |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|Cost of sales                                              |  |                                     | 1,943 |  |                         |  | 60  |                |  |  | 32           |  |  |                                | 96 |  |       |  |   |  |  |  | 2,131 | 
|Administrative and selling expenses                        |  |                                     | 19    |  |                         |  | 26  |                |  |  |             |  |  |                                |   |  |       |  | 18 |  |  |  | 63    | 
|                                                           |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|Total of property, plant and equipment                     |  |                                     | 1,962 |  |                         |  | 86  |                |  |  | 32           |  |  |                                | 96 |  |       |  | 18 |  |  |  | 2,194 | 
|                                                           |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|                                                           | 
|                                                           |  | 2012                                |      
|                                                           |  | Oil and GasExplorationandProduction |       |  | RefiningandDistribution |  |     | Petrochemicals |  |  | GasandEnergy |  |  | CorporateOther andEliminations |    |  | Total | 
|Additions of property, plant and equipment                 |  |                                     | 1,696 |  |                         |  | 207 |                |  |  | 65           |  |  |                                | 13 |  |       |  | 13 |  |  |  | 1,994 | 
|                                                           |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|Depreciation of property, plant and equipment uncluded in: |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|Cost of sales                                              |  |                                     | 1,494 |  |                         |  | 60  |                |  |  | 36           |  |  |                                | 94 |  |       |  |   |  |  |  | 1,684 | 
|Administrative and selling expenses                        |  |                                     | 14    |  |                         |  | 25  |                |  |  |             |  |  |                                |   |  |       |  | 15 |  |  |  | 54    | 
|                                                           |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 
|Total of property, plant and equipment                     |  |                                     | 1,508 |  |                         |  | 85  |                |  |  | 36           |  |  |                                | 94 |  |       |  | 15 |  |  |  | 1,738 | 
|                                                           |  |                                     |       |  |                         |  |     |                |  |  |              |  |  |                                |    |  |       |  |    |  |  |  |       | 

Sales for major products



|            |  |                                                                    |  |      |        |   |      |  |        |  
|----------- |  | ------------------------------------------------------------------ |  | ---- | ------ | - | ---- |  | ------ | -
|Products    |  | Business Segment                                                   |  | 2013 |        |   | 2012 | 
|Crude oil   |  | Oil and Gas Exploration and Production / Refining and Distribution |  |      | 7,146  |   |      |  | 5,944  |  
|Gas Oil     |  | Refining and Distribution                                          |  |      | 3,229  |   |      |  | 2,579  |  
|Gasoline    |  | Refining and Distribution                                          |  |      | 2,260  |   |      |  | 1,699  |  
|Electricity |  | Gas and Energy                                                     |  |      | 1,366  |   |      |  | 1,598  |  
|Gas         |  | Oil and Gas Exploration and Production                             |  |      | 2,730  |   |      |  | 2,117  |  
|Styrene     |  | Petrochemicals                                                     |  |      | 810    |   |      |  | 627    |  
|Polystyrene |  | Petrochemicals                                                     |  |      | 749    |   |      |  | 607    |  
|Others      |  |                                                                   |  |      | (2,950 | ) |      |  | (2,406 | )
|            |  |                                                                    |  |      |        |   |      |  |        |  
|            |  |                                                                    |  |      | 15,340 |   |      |  | 12,765 |  
|            |  |                                                                    |  |      |        |   |      |  |        |  



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PETROBRAS ARGENTINA S.A.



5.2. Relevant information by geographical area

Below is information on assets, sales, operating income and equity in earnings of affiliates aggregated by geographical
area:



|                                            |  |            |        |  |           |  |       |         |  |  |         |  |  |                       |     |  |       |  |    |  |  |  |        | 
|------------------------------------------- |  | ---------- | ------ |  | --------- |  | ----- | ------- |  |  | ------- |  |  | --------------------- | --- |  | ----- |  | -- |  |  |  | ------ | 
|                                            |  | 2013       |       
|                                            |  | Argentina  |        |  | Venezuela |  |       | Bolivia |  |  | Ecuador |  |  | Other andeliminations |     |  | Total | 
|Current assets                              |  |            | 5,931  |  |           |  | 39    |         |  |  | 151     |  |  |                       | 465 |  |       |  | 10 |  |  |  | 6,596  | 
|Investment in companies under joint control |  |            | 497    |  |           |  |      |         |  |  |        |  |  |                       |    |  |       |  |   |  |  |  | 497    | 
|Investments in associates                   |  |            | 237    |  |           |  | 3,078 |         |  |  |        |  |  |                       | 253 |  |       |  |   |  |  |  | 3,568  | 
|Other receivables                           |  |            | 80     |  |           |  | 93    |         |  |  |        |  |  |                       | 128 |  |       |  |   |  |  |  | 301    | 
|Property, plant and equipment               |  |            | 9,020  |  |           |  |      |         |  |  | 501     |  |  |                       | 3   |  |       |  |   |  |  |  | 9,524  | 
|Non-current other assets                    |  |            | 340    |  |           |  |      |         |  |  | 3       |  |  |                       | 31  |  |       |  | 2  |  |  |  | 376    | 
|                                            |  |            |        |  |           |  |       |         |  |  |         |  |  |                       |     |  |       |  |    |  |  |  |        | 
|Total assets                                |  |            | 16,105 |  |           |  | 3,210 |         |  |  | 655     |  |  |                       | 880 |  |       |  | 12 |  |  |  | 20,862 | 
|                                            |  |            |        |  |           |  |       |         |  |  |         |  |  |                       |     |  |       |  |    |  |  |  |        | 
|                                            | 
|                                            |  | 2012       |       
|                                            |  | Argentina  |        |  | Venezuela |  |       | Bolivia |  |  | Ecuador |  |  | Other andeliminations |     |  | Total | 
|Current assets                              |  |            | 5,537  |  |           |  | 46    |         |  |  | 92      |  |  |                       | 336 |  |       |  | 13 |  |  |  | 6,024  | 
|Investment in companies under joint control |  |            | 689    |  |           |  |      |         |  |  |        |  |  |                       |    |  |       |  |   |  |  |  | 689    | 
|Investments in associates                   |  |            | 203    |  |           |  | 2,634 |         |  |  |        |  |  |                       | 169 |  |       |  |   |  |  |  | 3,006  | 
|Other receivables                           |  |            | 95     |  |           |  | 86    |         |  |  |        |  |  |                       | 98  |  |       |  |   |  |  |  | 279    | 
|Property, plant and equipment               |  |            | 8,244  |  |           |  |      |         |  |  | 233     |  |  |                       | 2   |  |       |  | 1  |  |  |  | 8,480  | 
|Non-current other assets                    |  |            | 347    |  |           |  |      |         |  |  | 2       |  |  |                       | 17  |  |       |  | 3  |  |  |  | 369    | 
|                                            |  |            |        |  |           |  |       |         |  |  |         |  |  |                       |     |  |       |  |    |  |  |  |        | 
|Total assets                                |  |            | 15,115 |  |           |  | 2,766 |         |  |  | 327     |  |  |                       | 622 |  |       |  | 17 |  |  |  | 18,847 | 
|                                            |  |            |        |  |           |  |       |         |  |  |         |  |  |                       |     |  |       |  |    |  |  |  |        | 
|                                            | 
|                                            |  | 01.01.2012 |       
|                                            |  | Argentina  |        |  | Venezuela |  |       | Bolivia |  |  | Ecuador |  |  | Other andeliminations |     |  | Total | 
|Current assets                              |  |            | 4,915  |  |           |  | 42    |         |  |  | 77      |  |  |                       | 76  |  |       |  | 14 |  |  |  | 5,124  | 
|Investment in companies under joint control |  |            | 724    |  |           |  |      |         |  |  |        |  |  |                       |    |  |       |  |   |  |  |  | 724    | 
|Investments in associates                   |  |            | 364    |  |           |  | 2,450 |         |  |  |        |  |  |                       | 129 |  |       |  |   |  |  |  | 2,943  | 
|Other receivables                           |  |            | 105    |  |           |  | 102   |         |  |  |        |  |  |                       | 141 |  |       |  |   |  |  |  | 348    | 
|Property, plant and equipment               |  |            | 6,849  |  |           |  |      |         |  |  | 188     |  |  |                       | 18  |  |       |  | 1  |  |  |  | 7,056  | 
|Non-current other assets                    |  |            | 832    |  |           |  |      |         |  |  | 2       |  |  |                       | 309 |  |       |  | 3  |  |  |  | 1,146  | 
|                                            |  |            |        |  |           |  |       |         |  |  |         |  |  |                       |     |  |       |  |    |  |  |  |        | 
|Total assets                                |  |            | 13,789 |  |           |  | 2,594 |         |  |  | 267     |  |  |                       | 673 |  |       |  | 18 |  |  |  | 17,341 | 
|                                            |  |            |        |  |           |  |       |         |  |  |         |  |  |                       |     |  |       |  |    |  |  |  |        | 



|                        |  |           |        |  |           |  |      |         |  |  |         |  |  |                       |      |   |       |  |     |   |  |  |        | 
|----------------------- |  | --------- | ------ |  | --------- |  | ---- | ------- |  |  | ------- |  |  | --------------------- | ---- | - | ----- |  | --- | - |  |  | ------ | 
|                        |  | 2013      |       
|                        |  | Argentina |        |  | Venezuela |  |      | Bolivia |  |  | Ecuador |  |  | Other andeliminations |      |   | Total | 
|Sales (1)               |  |           | 15,151 |  |           |  |     |         |  |  | 152     |  |  |                       |     |   |       |  | 37  |   |  |  | 15,340 | 
|Operating income (loss) |  |           | 1,661  |  |           |  | (376 | )       |  |  | 60      |  |  |                       | 5    |   |       |  | 1   |   |  |  | 1,351  | 
|                        | 
|                        |  | 2012      |       
|                        |  | Argentina |        |  | Venezuela |  |      | Bolivia |  |  | Ecuador |  |  | Other andeliminations |      |   | Total | 
|Sales (1)               |  |           | 12,597 |  |           |  |     |         |  |  | 129     |  |  |                       |     |   |       |  | 39  |   |  |  | 12,765 | 
|Operating income (loss) |  |           | 1,431  |  |           |  | (158 | )       |  |  | 86      |  |  |                       | (104 | ) |       |  | (20 | ) |  |  | 1,235  | 
|                        | 
|                        |  | 2011      |       
|                        |  | Argentina |        |  | Venezuela |  |      | Bolivia |  |  | Ecuador |  |  | Other andeliminations |      |   | Total | 
|Sales (1)               |  |           | 10,944 |  |           |  |     |         |  |  | 124     |  |  |                       |     |   |       |  | 36  |   |  |  | 11,104 | 
|Operating income (loss) |  |           | 123    |  |           |  | (4   | )       |  |  | 45      |  |  |                       | (10  | ) |       |  | 8   |   |  |  | 162    | 



|(1) | Entirely related to sales to third parties.
|--- | -------------------------------------------



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PETROBRAS ARGENTINA S.A.





|6. | Cost of sales
|-- | -------------

The Companys cost of sales and the relevant expenses charged to cost of sales are broken down as follows:



|                                         |  |       |  |      |        |   |      |  |        |      |  |  |        |  
|---------------------------------------- |  | ----- |  | ---- | ------ | - | ---- |  | ------ | ---- |  |  | ------ | -
|                                         |  | Notes |  | 2013 |        |   | 2012 |  |        | 2011 | 
|                                         |  |       |  |     
|Inventories at the beginning of the year |  |       |  |      | 1,068  |   |      |  | 1,009  |      |  |  | 1,087  |  
|Purchases, consumptions and other        |  |       |  |      | 4,762  |   |      |  | 4,358  |      |  |  | 4,628  |  
|Expenses attributable to cost of sales   |  | 6.1   |  |      | 6,798  |   |      |  | 5,320  |      |  |  | 3,756  |  
|                                         |  |       |  |      |        |   |      |  |        |      |  |  |        |  
|                                         |  |       |  |      | 12,628 |   |      |  | 10,687 |      |  |  | 9,471  |  
|                                         |  |       |  |     
|Inventories at the end of the year       |  |       |  |      | (1,368 | ) |      |  | (1,068 | )    |  |  | (1,009 | )
|                                         |  |       |  |      |        |   |      |  |        |      |  |  |        |  
|Cost of sales                            |  |       |  |      | 11,260 |   |      |  | 9,619  |      |  |  | 8,462  |  
|                                         |  |       |  |      |        |   |      |  |        |      |  |  |        |  

6.1. Expenses attributable to cost of sales



|                                              |  |      |       |   |      |  |       |      |  |  |       |  
|--------------------------------------------- |  | ---- | ----- | - | ---- |  | ----- | ---- |  |  | ----- | -
|                                              |  | 2013 |       |   | 2012 |  |       | 2011 | 
|                                              |  |      |      
|Salaries and wages                            |  |      | 604   |   |      |  | 485   |      |  |  | 365   |  
|Other benefits to personnel                   |  |      | 132   |   |      |  | 87    |      |  |  | 74    |  
|Taxes, charges and contributions              |  |      | 25    |   |      |  | 16    |      |  |  | 15    |  
|Fees and professional advisory                |  |      | 4     |   |      |  | 4     |      |  |  | 9     |  
|Depreciation of property, plant and equipment |  |      | 2,131 |   |      |  | 1,684 |      |  |  | 1,148 |  
|Oil and gas royalties                         |  |      | 1,128 |   |      |  | 823   |      |  |  | 578   |  
|Spare parts and repairs                       |  |      | 580   |   |      |  | 485   |      |  |  | 355   |  
|Transportation and freights                   |  |      | 179   |   |      |  | 184   |      |  |  | 175   |  
|Procurement of works and services             |  |      | 1,812 |   |      |  | 1,397 |      |  |  | 972   |  
|Fuel, gas, energy and other                   |  |      | 119   |   |      |  | 83    |      |  |  | 47    |  
|Other operating costs and consumptions        |  |      | 150   |   |      |  | 115   |      |  |  | 60    |  
|Expense reimbursements                        |  |      | (66   | ) |      |  | (43   | )    |  |  | (42   | )
|                                              |  |      |       |   |      |  |       |      |  |  |       |  
|                                              |  |      | 6,798 |   |      |  | 5,320 |      |  |  | 3,756 |  
|                                              |  |      |       |   |      |  |       |      |  |  |       |  



|7. | Administrative and selling expenses
|-- | -----------------------------------



|                                              |  |      |       |   |      |  |       |      |  |  |       |  
|--------------------------------------------- |  | ---- | ----- | - | ---- |  | ----- | ---- |  |  | ----- | -
|                                              |  | 2013 |       |   | 2012 |  |       | 2011 | 
|                                              |  |      |      
|Salaries and wages                            |  |      | 665   |   |      |  | 584   |      |  |  | 489   |  
|Other benefits to personnel                   |  |      | 160   |   |      |  | 112   |      |  |  | 145   |  
|Taxes, charges and contributions              |  |      | 340   |   |      |  | 244   |      |  |  | 177   |  
|Fees and professional advisory                |  |      | 100   |   |      |  | 82    |      |  |  | 73    |  
|Depreciation of property, plant and equipment |  |      | 63    |   |      |  | 54    |      |  |  | 57    |  
|Spare parts and repairs                       |  |      | 60    |   |      |  | 51    |      |  |  | 43    |  
|Transportation and freights                   |  |      | 343   |   |      |  | 254   |      |  |  | 222   |  
|Procurement of works and services             |  |      | 133   |   |      |  | 121   |      |  |  | 93    |  
|Fuel, gas, energy and other                   |  |      | 10    |   |      |  | 8     |      |  |  | 7     |  
|Other operating costs and consumptions        |  |      | 57    |   |      |  | 62    |      |  |  | 38    |  
|Expense reimbursements                        |  |      | (134  | ) |      |  | (142  | )    |  |  | (122  | )
|                                              |  |      |       |   |      |  |       |      |  |  |       |  
|                                              |  |      | 1,797 |   |      |  | 1,430 |      |  |  | 1,222 |  
|                                              |  |      |       |   |      |  |       |      |  |  |       |  



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PETROBRAS ARGENTINA S.A.





|8. | Exploration expenses
|-- | --------------------



|                                              |  |      |    |  |      |  |     |      |  |  |     | 
|--------------------------------------------- |  | ---- | -- |  | ---- |  | --- | ---- |  |  | --- | 
|                                              |  | 2013 |    |  | 2012 |  |     | 2011 | 
|                                              |  |      |   
|Geological and geophysical expenses           |  |      | 55 |  |      |  | 44  |      |  |  | 97  | 
|Abandoned and non-productive well write-downs |  |      | 27 |  |      |  | 168 |      |  |  | 294 | 
|                                              |  |      |    |  |      |  |     |      |  |  |     | 
|                                              |  |      | 82 |  |      |  | 212 |      |  |  | 391 | 
|                                              |  |      |    |  |      |  |     |      |  |  |     | 



|9. | Other operating expenses, net
|-- | -----------------------------



|                                              |  |       |        |   |      |  |      |      |  |  |      |   |  |  |      |  
|--------------------------------------------- |  | ----- | ------ | - | ---- |  | ---- | ---- |  |  | ---- | - |  |  | ---- | -
|                                              |  | Notes |        |   | 2013 |  |      | 2012 |  |  | 2011 |  
|                                              |  |       |        |  
|Advisory services rendered to other companies |  |       |        |   |      |  | 39   |      |  |  | 37   |   |  |  | 40   |  
|Taxes on bank transactions                    |  |       |        |   |      |  | (197 | )    |  |  | (147 | ) |  |  | (154 | )
|Contingencies                                 |  |       |        |   |      |  | (103 | )    |  |  | (30  | ) |  |  | (112 | )
|Enviroment                                    |  |       | (1     | ) |      |  | (27  | )    |  |  |     |   |  |  | (260 | )
|Result from sale of Distrilec S.A.            |  |       | 13.1.1 |   |      |  | (34  | )    |  |  |     |   |  |  |     |  
|Disposal of property, plant and equipment     |  |       |        |   |      |  | (30  | )    |  |  | 23   |   |  |  | 30   |  
|Writedown of contractual credit in Ecuador    |  |       | 28     |   |      |  |     |      |  |  | (61  | ) |  |  | (143 | )
|CIESA debt restructuring                      |  |       | 13.1.4 |   |      |  |     |      |  |  | 221  |   |  |  |     |  
|Impairment Santa Cruz II                      |  |       |        |   |      |  | (11  | )    |  |  |     |   |  |  |     |  
|Other                                         |  |       |        |   |      |  | (208 | )    |  |  | (164 | ) |  |  | (232 | )
|                                              |  |       |        |   |      |  |      |      |  |  |      |   |  |  |      |  
|                                              |  |       |        |   |      |  | (571 | )    |  |  | (121 | ) |  |  | (831 | )
|                                              |  |       |        |   |      |  |      |      |  |  |      |   |  |  |      |  



|(1) | Corresponding to charges related to environmental issues undertaken by the Company from the current year, resulting from increased levels of demand
of internal policies, in line with international standards of excellence.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|10. | Financial results
|--- | -----------------



|                                          |  |       |  |      |      |   |      |  |      |      |  |  |      |  
|----------------------------------------- |  | ----- |  | ---- | ---- | - | ---- |  | ---- | ---- |  |  | ---- | -
|                                          |  | Note  |  | 2013 |      |   | 2012 |  |      | 2011 | 
|                                          |  |       |  |     
|Financial income                          |  |       |  |      |      |   |      |  |      |      |  |  |      |  
|Interest                                  |  |       |  |      | 200  |   |      |  | 133  |      |  |  | 93   |  
|Foreign exchange gains and other results  |  |       |  |      | 500  |   |      |  | 309  |      |  |  | 196  |  
|                                          |  |       |  |      |      |   |      |  |      |      |  |  |      |  
|                                          |  |       |  |      | 700  |   |      |  | 442  |      |  |  | 289  |  
|                                          |  |       |  |      |      |   |      |  |      |      |  |  |      |  
|Financial costs                           |  |       |  |      |      |   |      |  |      |      |  |  |      |  
|Interest                                  |  |       |  |      | (269 | ) |      |  | (247 | )    |  |  | (253 | )
|Foreign exchange losses and other results |  | 2.6.5 |  |      | (261 | ) |      |  | (156 | )    |  |  | (104 | )
|Other financial expenses, net             |  |       |  |      | (117 | ) |      |  | (109 | )    |  |  | (108 | )
|                                          |  |       |  |      |      |   |      |  |      |      |  |  |      |  
|                                          |  |       |  |      | (647 | ) |      |  | (512 | )    |  |  | (465 | )
|                                          |  |       |  |      |      |   |      |  |      |      |  |  |      |  



|11. | Earnings per share
|--- | ------------------

The Companys Shareholders Meeting held on March 29, 2012 resolved to capitalize retained earnings of 1,009, through the issue of 1,009,618,410 common shares of a Nominal Value of P$1 and
entitled to one vote per share.

According IAS 33, for all periods presented, the weighted average number of
ordinary shares was retroactively changed to give effect to the capitalization of retained earnings during 2012.



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PETROBRAS ARGENTINA S.A.



Basic and diluted earnings per share attributable to the controlling companys shareholders are calculated as follows:



|                                                                                                           |  |      |               |  |      |  |               |      |  |  |               |  
|---------------------------------------------------------------------------------------------------------- |  | ---- | ------------- |  | ---- |  | ------------- | ---- |  |  | ------------- | -
|Numerator                                                                                                  |  | 2013 |               |  | 2012 |  |               | 2011 | 
|                                                                                                           |  |      |              
|Income attributable to shareholders of parent company from continuing activities                           |  |      | 779           |  |      |  | 618           |      |  |  | (25           | )
|                                                                                                           |  |      |              
|Income attributable to shareholders of parent company from discontinued activities                         |  |      |              |  |      |  |              |      |  |  | 706           |  
|                                                                                                           |  |      |               |  |      |  |               |      |  |  |               |  
|                                                                                                           |  |      |              
|Total income for the purposes of basic earnings per share attributable to shareholders of parent company   |  |      | 779           |  |      |  | 618           |      |  |  | 681           |  
|                                                                                                           |  |      |               |  |      |  |               |      |  |  |               |  
|                                                                                                           |  |      |              
|Dilutive effects                                                                                           |  |      |              |  |      |  |              |      |  |  |              |  
|                                                                                                           |  |      |               |  |      |  |               |      |  |  |               |  
|                                                                                                           |  |      |              
|Total income for the purposes of diluted earnings per share attributable to shareholders of parent company |  |      | 779           |  |      |  | 618           |      |  |  | 681           |  
|                                                                                                           |  |      |               |  |      |  |               |      |  |  |               |  
|                                                                                                           |  |      |              
|Denominator                                                                                                |  | 2013 |               |  | 2012 |  |               | 2011 | 
|                                                                                                           |  |      |              
|Attributable to common shares Basic incomes per share                                                      |  |      | 2,019,236,820 |  |      |  | 2,019,236,820 |      |  |  | 2,019,236,820 |  
|                                                                                                           |  |      |              
|Dilutive effects                                                                                           |  |      |              |  |      |  |              |      |  |  |              |  
|                                                                                                           |  |      |               |  |      |  |               |      |  |  |               |  
|                                                                                                           |  |      |              
|Weighted average adjusted for dilutive effect                                                             |  |      | 2,019,236,820 |  |      |  | 2,019,236,820 |      |  |  | 2,019,236,820 |  
|                                                                                                           |  |      |               |  |      |  |               |      |  |  |               |  

There have been no transactions involving common shares or potential common shares
between the year closing date and the presentation of these financial statements.



|12. | Cash and cash equivalents
|--- | -------------------------



|                  |  |      |  |      |       |  |      |  |       |            |  |  |       | 
|----------------- |  | ---- |  | ---- | ----- |  | ---- |  | ----- | ---------- |  |  | ----- | 
|                  |  |      |  | 2013 |       |  | 2012 |  |       | 01.01.2012 | 
|                  |  |      |  |     
|Cash              |  |      |  |      | 116   |  |      |  | 156   |            |  |  | 85    | 
|Time deposits     |  |      |  |      | 231   |  |      |  | 773   |            |  |  | 660   | 
|Mutual funds      |  |      |  |      | 846   |  |      |  | 331   |            |  |  | 46    | 
|Related companies |  | 26.2 |  |      |      |  |      |  |      |            |  |  | 387   | 
|Other             |  |      |  |      |      |  |      |  |      |            |  |  | 14    | 
|                  |  |      |  |      |       |  |      |  |       |            |  |  |       | 
|                  |  |      |  |      | 1,193 |  |      |  | 1,260 |            |  |  | 1,192 | 
|                  |  |      |  |      |       |  |      |  |       |            |  |  |       | 



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|13. | Investments in joint ventures and associates
|--- | --------------------------------------------

13.1. Investments in joint ventures



|               |  |                           |   |  |        |  |             |            |  |  |            |  |  |            |     |  |            |  |     |  |  |  |     | 
|-------------- |  | ------------------------- | - |  | ------ |  | ----------- | ---------- |  |  | ---------- |  |  | ---------- | --- |  | ---------- |  | --- |  |  |  | --- | 
|               |  | 2013                      |   |  | 2012   |  |             | 01.01.2012 | 
|               |  | Description of securities |   |  |        |  |             |            |  |  |            | 
|               |  | Face value                |   |  | Amount |  |             | Cost       |  |  | Book value |  |  | Book value |     |  | Book value | 
|Distrilec S.A. |  |                           |  |  |        |  |            |            |  |  |           |  |  |            |    |  |            |  | 202 |  |  |  | 455 | 
|CIESA          |  | $                         | 1 |  |        |  | 319,409,348 |            |  |  | 596        |  |  |            | 497 |  |            |  | 487 |  |  |  | 269 | 
|               |  |                           |   |  |        |  |             |            |  |  |            |  |  |            |     |  |            |  |     |  |  |  |     | 
|               |  |                           |   |  |        |  |             |            |  |  | 596        |  |  |            | 497 |  |            |  | 689 |  |  |  | 724 | 
|               |  |                           |   |  |        |  |             |            |  |  |            |  |  |            |     |  |            |  |     |  |  |  |     | 



|      |  |                                    |            |  |              |  |     |                               |  |  |        |  |  |              |      |  |  |  |          | 
|----- |  | ---------------------------------- | ---------- |  | ------------ |  | --- | ----------------------------- |  |  | ------ |  |  | ------------ | ---- |  |  |  | -------- | 
|      |  | Last available financial statement |            |  |              | 
|      |  | Date                               |            |  | Capitalstock |  |     | Net income forthe period/year |  |  | Equity |  |  | Mainbusiness |     
|CIESA |  |                                    | 12/31/2013 |  |              |  | 639 |                               |  |  | 7      |  |  |              | 1261 |  |  |  | Investor | 

13.1.1. Distrilec

At December 31, 2012, through PEDASA and PFB, the Company held an indirect stake of 48.50% in Distrilec, parent
company of EDESUR.

In the first quarter of 2013, the Company sold to Hidroelectrica Piedra del Águila
S.A. and La Plata Cogeneración S.A. all of its direct and indirect interests in PEDASA and PFB, for an amount of US$ 35 million, with a loss of 34 shown under Other operating expenses, net (Note 9).

13.1.2. CIESA

The shareholders of CIESA, the parent company of TGS, may not sell their Class A shares representing 51% of TGSs capital stock, without the prior authorization of the regulatory agency
and the approval of the shareholders of CIESA.

13.1.3. Carrying value of the Companys interests in CIESA and
Distrilec

At December 31, 2013, 2012 and January 1, 2012, the carrying value of the direct and
indirect holding in CIESA was 497, 487 and 269, respectively. At January 1, 2012, the carrying value of CIESA including (185) for adjustments made to align the accounting principles to those of the Company and 110 from the transfer to Enron of
TGS shares

At December 31, 2012 and January 1, 2012, the carrying value of the indirect interest
in Distrilec amounts to 202 and 455, respectively, which includes 19 and 25 from the allocation of the consideration paid for the indirect interest in Distrilec in excess of fair value of net assets acquired.

The book value of these interests does not exceed their recoverable value.

13.1.4. CIESA indebtedness

Due to the Argentine macroeconomic situation, starting with the enactment of the Public Emergency Law CIESA did not pay at maturity, in April 2002, either the principal and the last interest installment,
their notes issued in 1997 for a nominal value of USD 200 million, or the cap and collar of interest rate agreements.

As of April 2004, the shareholders and creditors of financial CIESA held a series of agreements, which, among other actions, certain share in order to provide the necessary flexibility to advance the
restructuring was planned transfers CIESAs financial debt above. Thus, on 1 September 2005 entered into a Restructuring Agreement Financial Debt (Restructuring Agreement), which was subject to approval by the ENARGAS and CNDC, they
succeeding from January 2009 a number of legal claims before the Courts of New York.

On October 5, 2011,
by note No. 11,362, ENARGAS have expressed no objections to the Settlement Regulatory Restructuring and said that the same may be enforced once the approval is obtained by the CNDC. At the date of issuance of these financial statements, the
authorization of the CNDC was not obtained.



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On May 10, 2011 CIESA entered into a Memorandum of Understanding with Pampa Energía
S.A., Pampa Inversiones S.A. e Inversiones Argentina I Ltd. (Pampa Group), which also became the holder of the notes and on May 18, 2011, the parties to the CIESA Restructuring Agreement by which Pampa Group entered the agreement

On July 13, 2012, CIESA, Grupo Pampa and the Company entered into a settlement agreement whereby all parties
involved waived all claims, title and interest under the lawsuit before the New York State Courts and terminated the same. As a result of the agreement, CIESA paid off all the financial debt by means of (i) the transfer to Pampa Group of 4.3%
of TGSs shares; (ii) the payment of approximately US$130 million; (iii) the release of the remaining financial debt, and (iv) execution of a fifth amendment to the Restructuring Agreement. It was agreed that upon obtaining the
governmental approval, Pampa Group will receive shares representing 40% of CIESAs capital stock which are held in trust by The Royal Bank of Scotland, Argentine Branch.

As a result of the full settlement of CIESAs total financial debt, in the third quarter of 2012 the Company
recorded a gain of 291 for its shareholding in CIESA, of which 221 and 165 are charged to Other operating expenses, net and Share of profit of equity accounted investees, respectively, with a charge of 95 in Income tax.

Pursuant to the entry on July 13, 2012 into the settlement agreement described above, and to decisions taken by
CIESAs board of directors meeting held on October 23, 2012, on January 2, 2013, CIESA notified the CNV of the formal cancellation of the 1997 CIESA Notes, initiating the steps necessary for CIESAs withdrawal from public
offering and listing. On May 30, 2013, the CNV ordered CIESAs withdrawal from public offering and listing, through Resolution No. 17,904.

13.1.5. Tariff situation of the public utility companies

13.1.5.1. General framework

The scenario after the enactment of the Public Emergency Law significantly changed the financial equation of the public utility companies, which were affected, among others, by the local currency
devaluation, the pesification and the elimination of indexation clauses on rates.

The Public Emergency Law
provided for the conversion into Argentine pesos and the elimination of indexation clauses on public service rates, thus fixing them at the exchange rate of ARS 1 = US$ 1. In addition, the Executive Branch was empowered to renegotiate those
agreements entered into to provide public services, along the following criteria: (i) rates impact on economic competitiveness and revenue allocation, (ii) service quality and investment plans, to the extent that they were contractually
agreed upon, (iii) users interest and access to services, (iv) the safety in the system involved, and (v) companies profitability.

On February 12, 2002, the Executive Branch of Government issued Decree No. 293/02 whereby it recommended that the Ministry of the Economy and Production renegotiate the agreements executed with
public utility companies. UNIREN was created in July 2003, which took over the work of the Renegotiation Commission and its aim is, among others, to provide assistance in the public works and services renegotiation process, to execute comprehensive
or partial agreements, and to submit regulatory projects related to transitory rate adjustments.

In December
2013, the Law No. 26,896 was issued, which extended the public works and services renegotiation term to December 2015.

13.1.5.2. TGS

After UNIREN had submitted to TGS several proposals for the tariff adjustment as provided for in the concession contract that TGS had deemed insufficient, in October 2008 TGS executed a provisional
agreement with UNIREN, which provides for a 20 % tariff increase to be retroactively applied as from September 1, 2008 and for the application of the cash from such increase to an investment plan in the gas transportation system provided
under the same agreement.



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On December 3, 2009, the PEN issued Decree No. 1,918/09 ratifying the provisional
agreement. As a result, TGS will invoice its clients the tariff increase once the ENARGAS has published the new tariff schedule and has defined the invoicing method of the retroactive increase. This administrative formality, however, has not been
completed and considering the excessive delay, in August 2010, TGS sent a letter to ENARGAS requesting authorization to publish the tariff schedule including the 20% provisional tariff increase and the method for collection of the retroactive
increase and the application of an interest rate in accordance with the payment terms to be defined. ENARGAS answered TGS that it had forwarded the background information and the tariff project to the SCyCG, wich is part of the MPFIPyS, in
compliance with Resolution No. 2,000/2005 issued by the MPFIPyS.

On September 30, 2010, TGS filed
an action for the protection of its constitutional rights (acción de amparo) under Section 43 of the National Constitution and Law No.16,986, against ENARGAS and SCyCG to seek implementation of the new tariff schedule. On
November 8, 2010, notice was given to TGS of the judgment granting the requested action and thus ordering SCyCG to return to ENARGAS within two days the documents relating to the new tariff schedule applicable to TGS in compliance with Decree
No. 1,918/09, and instructing ENARGAS to define the tariff schedule and the method for collection of the retroactive increase within two days following receipt of the referred documents. ENARGAS and the SCyCG appealed.

In addition, on November 16, 2010, UNIREN proposed TGS to move forward with the renegotiation of the License
Agreement within the scope and according to the terms and conditions of the Public Emergency Law, for which purpose suspension of the before mentioned action for the protection of constitutional rights was demanded by UNIREN. On November 18,
2010, TGS decided to authorize the suspension for a term of 20 business days automatically renewable unless TGSs Board of Directors decided not to renew the same before or at the end of each period in order to move forward with the
renegotiation of the License Agreement. On December 28, 2010, TGS sent a letter to ENARGAS and the MPFIPyS asking for the execution of the writing requesting the suspension. As of the date of these financial statements, no favorable answer to
the letter has been received.

On April 5, 2011, Panel II of the Federal Court of Appeals in
Administrative matters set a 60 business day term for SCyCG to take action as provided under Resolution No. 2,000/2005 and return the record to ENARGAS, and instructed ENARGAS to render its opinion as regards the adequacy of tariffs and the
Provisional Tariff Schedule provided thereunder no later than 60 business days after receipt of the abovementioned record from SCyCG, upon verification of compliance with the requirements provided for in the provisional agreement dated
October 9, 2008. TGS and ENARGAS filed each one extraordinary appeals which was rejected by the Court of Appeals on May 27, 2011. On June 14, 2011 ENARGAS filed a complaint against refusal to grant appeal before the Federal Supreme
Court of Argentina. Meanwhile, on August 25, 2011 the SCyCG returned administrative actions cited ENARGAS realizing that it took the intervention by Resolution No. 2000/2005. On June 11, 2012 the Federal Supreme Court of Justice
required the main actions in order to resolve the complaint filed by ENARGAS, having the Company placed the fact of compliance by the SCyCG the lawsuit willing to his respect the Supreme Courts November 28, 2013 rejected the appeal filed
by the ENARGAS against the decision rejecting the Extraordinary Appeal brought against the judgment which confirmed the substance of the judgment delivered by the Judge of First Instance upheld the amparo filed by the Company.

Since more than one year has elapsed since publication of Decree No. 1.918/09 and given authorization of the
suspension of the action for the protection of constitutional rights, this meaning a material change in the conditions determining the original recording of the tariff increase, TGSs management resolved to: (i) discontinue recording the
revenues attributable to the tariff increase, and (ii) reverse the amount receivable previously accounted for in fiscal year ended December 31, 2009 and 2010 TGS managements decision does not imply a waiver of the rights conferred by
Decree No. 1,918/09.

This provisional agreement will be valid until the effective date of an agreement
for the comprehensive renegotiation of the license to be entered into with the National Government. As of the date of these financial statements, TGS is evaluating that proposal. As set forth in the provisional agreement, TGS should reach an
agreement with UNIREN on the modalities, terms and dates for the execution of the comprehensive agreement before the expiration date of the Economic Emergency Law. If no agreement is reached, UNIREN will submit a report to the PEN recommending the
steps to be taken.



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Early in October 2008, TGS received from UNIREN a proposal for a comprehensive renegotiation
agreement (including the 20% initial tariff increase). In October 2011, TGS received a new proposal from UNIREN which was accepted by TGS, allowing UNIREN to initiate the relevant administrative procedure.

On April 7, 2014, the ENARGAS issued Resolution No. 2,852/14 defining the new tariff schedules including an
increase to the rate applicable to the natural gas firm and interruptible transportation rates. The increase in the rate is set forth in three stages, as follows: 8% from April 1, 2014, 5.5% from June 1, 2014 and 5.3% from August 1,
2014, reaching from August 1, 2014, a cumulative increase of 20%.

Additionally, the Resolution
No. 2,852/14, established that at least 5% of the funds generated by this tariff increase must be temporarily deposited in a trust fund for the payment of maintenance works according to an investment plan submitted by TGS and previously
approved by the ENARGAS; and the remaining balance of the increase will be managed TGS for the fulfillment of that investment plan.

However, this is a partial implementation of the 2008 provisional agreement; ratified by Decree No. 1,918/09, that is expected to remain in effect until a comprehensive renegotiation of the license
with the Argentine government is completed. TGS will continue performing all the legal actions to obtain the complete enforcement of the 2008 provisional agreement.

Investment CIESA / TGS

At December 31, 2013 the book
value of the investment in CIESA (TGSs controlling shareholder ) amounts to 497 and represents about 2% of the total assets of Petrobras Argentina.

The Company has analysed of the recoverability of the investment based on assumptions of increases in business rates TGS, and concluded that they should be recorded impairment losses. The materialization
of certain assumptions used in the evaluation is highly sensitive to the economic environment and is contingent on future events and actions, some of which are outside the scope of the management of the Company and could affect the value of the
assets.

13.2. Investment in associates



|                                        |  |      |      |   |                           |     |      |        |  |  |             |  |  |            |     |  |            |  |        |            |  |  |        |   |  |  |        |  
|--------------------------------------- |  | ---- | ---- | - | ------------------------- | --- | ---- | ------ |  |  | ----------- |  |  | ---------- | --- |  | ---------- |  | ------ | ---------- |  |  | ------ | - |  |  | ------ | -
|                                        |  |      |      |   | 2013                      |     |      | 2012   |  |  | 01.01.2012  | 
|                                        |  |      |      |   | Description of securities |     |      |        |  |  |             |  |  |            |    
|                                        |  | Note |      |   | Face value                |     |      | Amount |  |  | Cost        |  |  | Book value |     |  | Book value |  |        | Book value | 
|                                        |  |      |      |   |                           |     |     
|OCP                                     |  |      |      |   |                           | U$S | 0,01 |        |  |  | 31500.00    |  |  |            | 98  |  |            |  | 253    |            |  |  | 169    |   |  |  | 129    |  
|Oleoductos del Valle S.A.               |  |      |      |   |                           | $   | 10   |        |  |  | 2542716.10  |  |  |            | 61  |  |            |  | 44     |            |  |  | 43     |   |  |  | 54     |  
|PELSA                                   |  |      | 13.5 |   |                           | $   | 1    |        |  |  | 68218172.00 |  |  |            | 2   |  |            |  |       |            |  |  |       |   |  |  | 160    |  
|Refinería del Norte S.A.                |  |      |      |   |                           | $   | 10   |        |  |  | 2610809.00  |  |  |            | 63  |  |            |  | 192    |            |  |  | 159    |   |  |  | 148    |  
|Mixed Companies in Venezuela            |  |      | (1   | ) |                           |     |     |        |  |  |            |  |  |            |    |  |            |  | 5,981  |            |  |  | 4,437  |   |  |  | 3,779  |  
|Other                                   |  |      |      |   |                           |     |      |        |  |  |             |  |  |            |    |  |            |  | 1      |            |  |  | 1      |   |  |  | 2      |  
|Allowance for impairment of investments |  |      | (2   | ) |                           |     |      |        |  |  |             |  |  |            |    |  |            |  | (2,903 | )          |  |  | (1,803 | ) |  |  | (1,329 | )
|                                        |  |      |      |   |                           |     |      |        |  |  |             |  |  |            |     |  |            |  |        |            |  |  |        |   |  |  |        |  
|                                        |  |      |      |   |                           |     |      |        |  |  |             |  |  |            | 224 |  |            |  | 3,568  |            |  |  | 3,006  |   |  |  | 2,943  |  
|                                        |  |      |      |   |                           |     |      |        |  |  |             |  |  |            |     |  |            |  |        |            |  |  |        |   |  |  |        |  



|                             |  |  |    |   |                                    |  |            |              |  |  |                              |  |  |        |     |  |               |  |      |  |  |                   
|---------------------------- |  |  | -- | - | ---------------------------------- |  | ---------- | ------------ |  |  | ---------------------------- |  |  | ------ | --- |  | ------------- |  | ---- |  |  | ------------------
|                             |  |  |    |   | Last available financial statement |  |            |             
|                             |  |  |    |   | Date                               |  |            | Capitalstock |  |  | Net incomefor theperiod/year |  |  | Equity |     |  | Main business
|OCP                          |  |  |    |   |                                    |  | 09/30/2013 |              |  |  | 602                          |  |  |        | 284 |  |               |  | 1384 |  |  | Oil transportation
|Oleoductos del Valle S.A.    |  |  |    |   |                                    |  | 12/31/2013 |              |  |  | 110                          |  |  |        | 4   |  |               |  | 205  |  |  | Oil transportation
|PELSA                        |  |  |    |   |                                    |  | 12/31/2013 |              |  |  | 116                          |  |  |        | 378 |  |               |  | 1368 |  |  | Oil production    
|Refinería del Norte S.A.     |  |  |    |   |                                    |  | 09/30/2013 |              |  |  | 92                           |  |  |        | 56  |  |               |  | 669  |  |  | Refining          
|Mixed Companies in Venezuela |  |  | (1 | ) |                                    |  |           |              |  |  |                             |  |  |        |    |  |               |  |     |  |  | Oil production    



|(1) | Included Petrokariña S.A., Petroritupano S.A., Petroven-Bras S.A. and Petrowayú S.A
|--- | -----------------------------------------------------------------------------------

|(2) | The activity for the years ended December 31, 2013, 2012 and 2011, includes (580), (189) and (65) charged to Other
comprehensive income and (520), (285) and (281), charged to Share of profit of equity accounted investees, respectively (see note 13.3).
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

For purposes of IFRSs 12 requirements, the Company does not have significant investments in associates.



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Investments in Mixed Companies in Venezuela

In April 2005, the MEP instructed PDVSA to review the thirty-two operating agreements signed by PDVSA affiliates with oil
companies from 1992 through 1997. These instructions given by the MEP established that all the necessary measures should be taken by PDVSA to migrate all operating agreements effective at that time to mixed companies. In August 2006, the conversion
operating agreements were signed, providing for that the equity interest of private partners in such mixed companies would be of 40%, with the remaining 60% to be held by the Venezuelan Government.

The companies Petroritupano S.A., Petrowayú S.A., Petroven-Bras S.A. and Petrokariña S.A. (collectively
referred to as mixed companies) were organized as a result of migration of the operating agreements governing production activities in Venezuela in the Oritupano Leona, La Concepción, Acema and Mata areas, respectively.

The mixed companies have to sell to PDVSA all liquid hydrocarbons and the associated natural gas (when so
provided in the agreement), produced in the delimited area, according to a price formula associated with international benchmarks such as WTS and WTI.

As of December 31, 2013, 2012 and January 1, 2012 the carrying value of the Companys direct and indirect interest in the mixed companies, net of impairment charges, is 3,078, 2,634 and 2,450,
respectively. The recoverability of the referred investments is highly sensitive to crude oil price volatility, to economic, social and regulatory changes and, particularly, to the resulting business plans. In determining the fair value, the Company
considered prices based on business plans, production curves, transaction costs at market values and investment needs to develop the reserves of such companies. Discount rates used to measure fair value consider the type of asset involved, the
business segment and the country where operations are conducted. As of December 31, 2013, 2012 and January 1, 2012 the Company maintains allowances for impairment on these investments of 2,854, 1,803 and 1,329, respectively.

Upon the execution of the pertinent agreements in connection with the migration of the operating agreements, in 2006, the
Government of Venezuela recognized a divisible and transferable credit in favor of the private companies participating in the mixed companies in the amount of US$ 88.5 million for Petrobras Argentinas equity interest, which does not
accrue interest and could be applied to the payment of acquisition bonds to be used in any new mixed ownership project for oil exploration and production activities, or licenses for gas exploration and production operations in Venezuela. Since
projects for the use of the credit recognized had not materialized, the efforts to transfer such credit to third parties had not been successful, and other alternative uses of the credit was not anticipated, in 2007 the Company recorded an allowance
for the full amount of the credit. As of December 31, 2013, 2012 and January 1, 2012 the Company maintains allowances for impairment on this asset of 574, 434 and 380, respectively.

13.3. Share of profit of equity accounted investees



|                             |  |      |  |      |      |   |      |  |      |      |  |  |      |  
|---------------------------- |  | ---- |  | ---- | ---- | - | ---- |  | ---- | ---- |  |  | ---- | -
|                             |  |      |  | 2013 |      |   | 2012 |  |      | 2011 | 
|Mixed Companies in Venezuela |  | (1)  |  |      | (357 | ) |      |  | (162 | )    |  |  | (176 | )
|Refinería del Norte S.A.     |  |      |  |      | 44   |   |      |  | 11   |      |  |  | 67   |  
|PELSA                        |  | 13.5 |  |      |     |   |      |  | 26   |      |  |  | 40   |  
|CIESA                        |  | (2)  |  |      | 10   |   |      |  | 219  |      |  |  | 121  |  
|Distrilec                    |  |      |  |      |     |   |      |  | (253 | )    |  |  | (90  | )
|Other                        |  |      |  |      | 24   |   |      |  | 11   |      |  |  | 2    |  
|                             |  |      |  |      |      |   |      |  |      |      |  |  |      |  
|                             |  |      |  |      | (279 | ) |      |  | (148 | )    |  |  | (36  | )
|                             |  |      |  |      |      |   |      |  |      |      |  |  |      |  



| | (1) | Includes an allowance of 520, 285 and 281 for the years ended December 31, 2013, 2012 and 2011.
| | --- | -----------------------------------------------------------------------------------------------

| | (2) | In 2012, includes 165 for the debt restructuring of CIESA. (Note 13.1.4)
| | --- | ------------------------------------------------------------------------



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13.4. Dividends collected



|                             |  |      |  |      |    |  |      |  |    |      |  |  |     | 
|---------------------------- |  | ---- |  | ---- | -- |  | ---- |  | -- | ---- |  |  | --- | 
|                             |  |      |  | 2013 |    |  | 2012 |  |    | 2011 | 
|Mixed Companies in Venezuela |  |      |  |      |   |  |      |  |   |      |  |  | 327 | 
|Refinería del Norte S.A.     |  |      |  |      | 16 |  |      |  |   |      |  |  | 59  | 
|PELSA                        |  | 13.5 |  |      |   |  |      |  | 9  |      |  |  | 25  | 
|OCP                          |  |      |  |      | 4  |  |      |  | 3  |      |  |  | 3   | 
|Other                        |  |      |  |      | 3  |  |      |  | 2  |      |  |  | 2   | 
|                             |  |      |  |      |    |  |      |  |    |      |  |  |     | 
|                             |  |      |  |      | 23 |  |      |  | 14 |      |  |  | 416 | 
|                             |  |      |  |      |    |  |      |  |    |      |  |  |     | 

13.5. Acquisition of PELSA

On May 31, 2012, the Company reached an agreement to acquire a 39.671% equity interest in Petrolera Entre Lomas S.A.
from its controlling company Petrobras Participaciones S.L. for US$ 249.4 million. As from this date, Petrobras Argentina exercises control over Petrolera Entre Lomas S.A. with a shareholding of 58.88%.

The price agreed between the parties further includes a contingent payment to the seller for a period of 10 years from
the acquisition to reflect the value of any identification of unconventional resources in commercially exploitable areas Entre Lomas, Bajada del Palo, Agua Amarga and Charco del Palenque. Such compensation will be done considering the market value
of these resources to the valuation date, and will be conducted by an internationally renowned independent evaluator hired by agreement between the parties. At the date of issuance of these financial statements have not been identified
unconventional commercially exploitable resources, whereby the Company has not recognized liabilities related to this transaction

When accounting for this acquisition, the Company recognized the subsidiarys assets and liabilities at book value as of the transaction date. As the fair value of the net assets acquired was higher
than book value, the Company recorded 693 in Equity (Note 2.6.5)

Effects PELSA consolidation in the financial statements of the Company:

The assets and liabilities incorporated in the May 31, 2012 were as follows:



|                              |  |  |       | 
|----------------------------- |  |  | ----- | 
|Cash and cash equivalents     |  |  | 110   | 
|Property, plant and equipment |  |  | 1,098 | 
|Other assets                  |  |  | 369   | 
|                              |  |  |       | 
|Total assets                  |  |  | 1,577 | 
|                              |  |  |       | 
|Total liabilities             |  |  | 546   | 
|                              |  |  |       | 

The results incorporated since 1 June 2012 are as follows:



|             |  |  |     | 
|------------ |  |  | --- | 
|Sales        |  |  | 841 | 
|Gross profit |  |  | 327 | 
|Net incomes  |  |  | 80  | 

If they had been consolidated since 1 January 2012 the results have been incorporated as follows:



|             |  |  |       | 
|------------ |  |  | ----- | 
|Sales        |  |  | 1,414 | 
|Gross profit |  |  | 585   | 
|Net incomes  |  |  | 271   | 



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13.6. Information about interest in subsidiaries, associates, entities under joint control and other entities as of
December 31, 2013



|                                              |  |             |  |                          |        |  |          |  |        |                  |  |                                       
|--------------------------------------------- |  | ----------- |  | ------------------------ | ------ |  | -------- |  | ------ | ---------------- |  | --------------------------------------
|                                              |  |             |  | % Of Ownership and Votes |        |  |         
|Subsidiaries                                  |  | Country     |  | Direct                   |        |  | Indirect |  |        | Business Segment
|Atalaya Energy S.R.L.                         |  | Argentina   |  |                          | 95.00  |  |          |  | 5.00   |                  |  | Oil and Gas Exploration and Production
|Canadian Hunter Argentina S.A                 |  | Argentina   |  |                          | 95.00  |  |          |  | 5.00   |                  |  | Oil and Gas Exploration and Production
|Corod Producción S.A.                         |  | Venezuela   |  |                          | 100.00 |  |          |  |       |                  |  | Oil and Gas Exploration and Production
|EcuadorTLC S.A.                               |  | Ecuador     |  |                          | 100.00 |  |          |  |       |                  |  | Oil and Gas Exploration and Production
|Eg3 Red S.A.                                  |  | Argentina   |  |                          | 95.00  |  |          |  | 5.00   |                  |  | Refining and Distribution             
|Electricidade Com S.A.                        |  | Brasil      |  |                          |       |  |          |  | 100.00 |                  |  | Gas and Energy                        
|Enecor S.A.                                   |  | Argentina   |  |                          | 69.99  |  |          |  |       |                  |  | Gas and Energy                        
|Petrobras Bolivia Internacional S.A.          |  | Bolivia     |  |                          | 100.00 |  |          |  |       |                  |  | Corporate                             
|Petrobras Energía Colombia                    |  | Gran Cayman |  |                          |       |  |          |  | 100.00 |                  |  | Oil and Gas Exploration and Production
|Petrobras Energía de México S.A. de C.V.      |  | México      |  |                          |       |  |          |  | 100.00 |                  |  | Oil and Gas Exploration and Production
|Petrobras Energía Ecuador                     |  | Gran Cayman |  |                          |       |  |          |  | 100.00 |                  |  | Oil and Gas Exploration and Production
|Petrobras Energía Internacional S.A.          |  | Argentina   |  |                          | 95.00  |  |          |  | 5.00   |                  |  | Corporate                             
|Petrobras Energía Operaciones Ecuador S.A.    |  | Ecuador     |  |                          |       |  |          |  | 100.00 |                  |  | Oil and Gas Exploration and Production
|Petrobras Hispano Argentina S.A.              |  | España      |  |                          | 100.00 |  |          |  |       |                  |  | Corporate                             
|Petrolera San Carlos S.A.                     |  | Venezuela   |  |                          |       |  |          |  | 100.00 |                  |  | Oil and Gas Exploration and Production
|Transporte y Servicios de Gas en Uruguay S.A. |  | Uruguay     |  |                          | 51.00  |  |          |  | 13.55  |                  |  | Gas and Energy                        
|World Energy Business S.A.                    |  | Argentina   |  |                          |       |  |          |  | 100.00 |                  |  | Gas and Energy                        
|Petrolera Entre Lomas S.A.                    |  | Argentina   |  |                          | 58.88  |  |          |  |       |                  |  | Oil and Gas Exploration and Production
|                                              |  |             |  |                         
|Entities under joint control                  |  |             |  |                          |        |  |          |  |        |                  |  |                                       
|                                              |  |             |  |                         
|Cía. de Inversiones de Energía S.A.           |  | Argentina   |  |                          | 25.00  |  |          |  | 25.00  |                  |  | Gas and Energy                        
|Transportadora de Gas del Sur S.A.            |  | Argentina   |  |                          |       |  |          |  | 25.50  |                  |  | Gas and Energy                        
|                                              |  |             |  |                         
|Associates                                    |  |             |  |                          |        |  |          |  |        |                  |  |                                       
|                                              |  |             |  |                         
|Coroil S.A.                                   |  | Venezuela   |  |                          | 20.00  |  |          |  | 29.00  |                  |  | Oil and Gas Exploration and Production
|Inversora Mata S.A.                           |  | Venezuela   |  |                          | 49.00  |  |          |  |       |                  |  | Oil and Gas Exploration and Production
|Oleoducto de Crudos Pesados Ltd.              |  | Gran Cayman |  |                          |       |  |          |  | 11.42  |                  |  | Oil and Gas Exploration and Production
|Oleoducto de Crudos Pesados S.A.              |  | Ecuador     |  |                          |       |  |          |  | 11.42  |                  |  | Oil and Gas Exploration and Production
|Oleoductos del Valle S.A.                     |  | Argentina   |  |                          | 23.10  |  |          |  |       |                  |  | Oil and Gas Exploration and Production
|Petrokariña S.A.                              |  | Venezuela   |  |                          | 29.20  |  |          |  | 5.29   |                  |  | Oil and Gas Exploration and Production
|Petroritupano S.A.                            |  | Venezuela   |  |                          | 22.00  |  |          |  |       |                  |  | Oil and Gas Exploration and Production
|Petroven-Bras S.A.                            |  | Venezuela   |  |                          | 29.20  |  |          |  | 5.29   |                  |  | Oil and Gas Exploration and Production
|Petrowayú S.A.                                |  | Venezuela   |  |                          | 36.00  |  |          |  |       |                  |  | Oil and Gas Exploration and Production
|Propyme S.G.R (en liquidación)                |  | Argentina   |  |                          | 48.56  |  |          |  | 0.07   |                  |  | Corporate                             
|Refinería del Norte S.A.                      |  | Argentina   |  |                          | 28.50  |  |          |  |       |                  |  | Refining and Distribution             
|Urugua-í S.A.                                 |  | Argentina   |  |                          | 29.33  |  |          |  |       |                  |  | Gas and Energy                        
|                                              |  |             |  |                         
|Other entities                                |  |             |  |                          |        |  |          |  |        |                  |  |                                       
|                                              |  |             |  |                         
|Termoeléctrica José de San Martín S.A.        |  | Argentina   |  |                          | 8.84   |  |          |  |       |                  |  | Gas and Energy                        
|Termoeléctrica Manuel Belgrano S.A.           |  | Argentina   |  |                          | 8.84   |  |          |  |       |                  |  | Gas and Energy                        



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13.7.Relevant information

The table below shows the most relevant information from the statements of income and cash flows of the subsidiaries with
material non-controlling interest, apply from the purchase of an additional interest in PELSA in May 2012 (Note 13.5)



|                                            |  |           |  |                                    |        |   |      |  |        |  
|------------------------------------------- |  | --------- |  | ---------------------------------- | ------ | - | ---- |  | ------ | -
|                                            |  |           |  | Proportion non-controllig interest |       
|Name                                        |  | Country   |  | 2013                               |        |   | 2012 | 
|Petrolera Entre Lomas S.A.                  |  | Argentina |  |                                    | 41     | % |      |  | 41     | %
|                                            |  |           | 
|                                            |  |           |  | 2013                               |        |   | 2012 | 
|Statement of profit or loss                 |  |           |  |                                    |        |   |      |  |        |  
|Sales                                       |  |           |  |                                    | 1,686  |   |      |  | 841    |  
|Cost of sales                               |  |           |  |                                    | (1,044 | ) |      |  | (514   | )
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Gross profit                                |  |           |  |                                    | 642    |   |      |  | 327    |  
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Administrative and others expenses          |  |           |  |                                    | (179   | ) |      |  | (76    | )
|Financial results                           |  |           |  |                                    | (7     | ) |      |  | 1      |  
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Income (loss) before income tax             |  |           |  |                                    | 456    |   |      |  | 252    |  
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Income tax                                  |  |           |  |                                    | (278   | ) |      |  | (118   | )
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Income (loss) from continuing operations    |  |           |  |                                    | 178    |   |      |  | 134    |  
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Attributable to non-controlling interests   |  |           |  |                                    | 73     |   |      |  | 55     |  
|Other comprehensive income                  |  |           |  |                                    | 416    |   |      |  | 95     |  
|Attributable to non-controlling interests   |  |           |  |                                    | 171    |   |      |  | 39     |  
|Dividends paid to non-controlling interests |  |           |  |                                    | 16     |   |      |  | 18     |  
|                                            |  |           | 
|                                            |  |           |  | 2013                               |        |   | 2012 | 
|Statement of financial position             |  |           |  |                                    |        |   |      |  |        |  
|Current Assets                              |  |           |  |                                    | 537    |   |      |  | 455    |  
|Non-current Assets                          |  |           |  |                                    | 1,953  |   |      |  | 1,387  |  
|Current Liabilities                         |  |           |  |                                    | (355   | ) |      |  | (346   | )
|Non-current Liabilities                     |  |           |  |                                    | (354   | ) |      |  | (268   | )
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Equity                                      |  |           |  |                                    | (1,781 | ) |      |  | (1,228 | )
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Attributable to non-controlling interests   |  |           |  |                                    | (734   | ) |      |  | (506   | )
|                                            |  |           | 
|                                            |  |           |  | 2013                               |        |   | 2012 | 
|Cash flow                                   |  |           |  |                                    |        |   |      |  |        |  
|Operating                                   |  |           |  |                                    | 657    |   |      |  | 423    |  
|Investing                                   |  |           |  |                                    | (559   | ) |      |  | (143   | )
|Financing                                   |  |           |  |                                    | (145   | ) |      |  | (111   | )
|Effect of exchange rate change              |  |           |  |                                    | 58     |   |      |  | 11     |  
|                                            |  |           |  |                                    |        |   |      |  |        |  
|Increase                                    |  |           |  |                                    | 11     |   |      |  | 180    |  
|                                            |  |           |  |                                    |        |   |      |  |        |  



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Associates and joint arrangements



|                                 |  |            |       |  |                   |  |    |            |  |  |                   |  |  |            |     |  |                   |  |       |  |  |  |    | 
|-------------------------------- |  | ---------- | ----- |  | ----------------- |  | -- | ---------- |  |  | ----------------- |  |  | ---------- | --- |  | ----------------- |  | ----- |  |  |  | -- | 
|                                 |  | 2013       |       |  | 2012              |  |    | 2011       | 
|                                 |  | Associates |       |  | JointArrangements |  |    | Associates |  |  | JointArrangements |  |  | Associates |     |  | JointArrangements | 
|Total other comprehensive income |  |            | 1,862 |  |                   |  | 19 |            |  |  | 581               |  |  |            | 148 |  |                   |  | 1,357 |  |  |  | 37 | 



|14. | Other investments
|--- | -----------------



|                                             |  |       |  |      |     |  |           |  |     |            |  |  |           |   |  |  |     |  
|-------------------------------------------- |  | ----- |  | ---- | --- |  | --------- |  | --- | ---------- |  |  | --------- | - |  |  | --- | -
|                                             |  |       |  | 2013 |     |  | 2012      |  |     | 01.01.2012 | 
|                                             |  | Notes |  | Cost |     |  | Bookvalue |  |     | Bookvalue  |  |  | Bookvalue |  
|                                             |  |       |  |      |    
|Current                                      |  |       |  |      |     |  |           |  |     |            |  |  |           |   |  |  |     |  
|                                             |  |       |  |      |    
|Fideicomiso Financiero de Obra Gasoducto Sur |  | 29.2  |  |      | 13  |  |           |  | 20  |            |  |  | 20        |   |  |  | 21  |  
|Other                                        |  |       |  |      | 3   |  |           |  | 3   |            |  |  |          |   |  |  |    |  
|                                             |  |       |  |      |     |  |           |  |     |            |  |  |           |   |  |  |     |  
|                                             |  |       |  |      | 16  |  |           |  | 23  |            |  |  | 20        |   |  |  | 21  |  
|                                             |  |       |  |      |     |  |           |  |     |            |  |  |           |   |  |  |     |  
|                                             |  |       |  |      |    
|Non Current                                  |  |       |  |      |     |  |           |  |     |            |  |  |           |   |  |  |     |  
|                                             |  |       |  |      |    
|Loans to joint venture                       |  |       |  |      | 172 |  |           |  | 172 |            |  |  | 130       |   |  |  | 115 |  
|Related companies                            |  | 26.2  |  |      | 128 |  |           |  | 128 |            |  |  | 98        |   |  |  | 148 |  
|Fideicomiso Financiero de Obra Gasoducto Sur |  | 29.2  |  |      | 64  |  |           |  | 64  |            |  |  | 82        |   |  |  | 98  |  
|Allowance for impairment of investments      |  |       |  |      |    |  |           |  | (79 | )          |  |  | (44       | ) |  |  | (13 | )
|Other                                        |  |       |  |      |    |  |           |  | 16  |            |  |  | 13        |   |  |  |    |  
|                                             |  |       |  |      |     |  |           |  |     |            |  |  |           |   |  |  |     |  
|                                             |  |       |  |      | 364 |  |           |  | 301 |            |  |  | 279       |   |  |  | 348 |  
|                                             |  |       |  |      |     |  |           |  |     |            |  |  |           |   |  |  |     |  



|15. | Trade receivables and other receivables
|--- | ---------------------------------------



|                                       |  |       |  |         |       |   |             |  |     |            |  |  |             |   |  |         |     |   |             |  |       |   |  |  |     |  
|-------------------------------------- |  | ----- |  | ------- | ----- | - | ----------- |  | --- | ---------- |  |  | ----------- | - |  | ------- | --- | - | ----------- |  | ----- | - |  |  | --- | -
|                                       |  |       |  | 2013    |       |   | 2012        |  |     | 01.01.2012 | 
|                                       |  | Notes |  | Current |       |   | Non-current |  |     | Current    |  |  | Non-current |   |  | Current |     |   | Non-current | 
|Trade receivable                       |  |       |  |         |       |   |             |  |     |            |  |  |             |   |  |         |     |   |             |  |       |   |  |  |     |  
|                                       |  |       |  |         |       |   |            
|Receivables                            |  |       |  |         |       |   |             |  |     |            |  |  |             |   |  |         |     |   |             |  |       |   |  |  |     |  
|Petrochemical                          |  |       |  |         | 463   |   |             |  |    |            |  |  | 313         |   |  |         |    |   |             |  | 224   |   |  |  |    |  
|Refining and distribution              |  |       |  |         | 541   |   |             |  | 6   |            |  |  | 452         |   |  |         | 7   |   |             |  | 698   |   |  |  | 8   |  
|Oil and gas exploration and production |  |       |  |         | 323   |   |             |  | 74  |            |  |  | 294         |   |  |         | 57  |   |             |  | 131   |   |  |  | 48  |  
|Gas and energy                         |  |       |  |         | 1,183 |   |             |  | 62  |            |  |  | 1,058       |   |  |         | 75  |   |             |  | 768   |   |  |  | 201 |  
|Related companies                      |  | 26.2  |  |         | 43    |   |             |  |    |            |  |  | 92          |   |  |         |    |   |             |  | 82    |   |  |  |    |  
|                                       |  |       |  |         |       |   |             |  |     |            |  |  |             |   |  |         |     |   |             |  |       |   |  |  |     |  
|                                       |  |       |  |         | 2,553 |   |             |  | 142 |            |  |  | 2,209       |   |  |         | 139 |   |             |  | 1,903 |   |  |  | 257 |  
|Less: Allowance for doubtful           |  | (1)   |  |         | (34   | ) |             |  | (69 | )          |  |  | (41         | ) |  |         | (53 | ) |             |  | (32   | ) |  |  | (46 | )
|                                       |  |       |  |         |       |   |             |  |     |            |  |  |             |   |  |         |     |   |             |  |       |   |  |  |     |  
|                                       |  | (2)   |  |         | 2,519 |   |             |  | 73  |            |  |  | 2,168       |   |  |         | 86  |   |             |  | 1,871 |   |  |  | 211 |  
|                                       |  |       |  |         |       |   |             |  |     |            |  |  |             |   |  |         |     |   |             |  |       |   |  |  |     |  



|(1) | The activity in the years ended December 31, 2013, 2012 and 2011, includes (9), (16) and (21) charged to Administrative and
selling expenses and , as of December 31, 2012, includes 35 related to write-offs.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | As of December 31, 2013, 2012 and January 1, 2012 current trade receivables include an average of 4% of non provisioned due, which do not
exceed a period of 3 months.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|                                                            |  |       |  |         |       |  |            |  |      |            |  |  |            |  |  |         |      |   |            |  |       |  |  |  |      |  
|----------------------------------------------------------- |  | ----- |  | ------- | ----- |  | ---------- |  | ---- | ---------- |  |  | ---------- |  |  | ------- | ---- | - | ---------- |  | ----- |  |  |  | ---- | -
|                                                            |  |       |  | 2013    |       |  | 2012       |  |      | 01.01.2012 | 
|                                                            |  | Notes |  | Current |       |  | Noncurrent |  |      | Current    |  |  | Noncurrent |  |  | Current |      |   | Noncurrent | 
|Other receivables                                           |  |       |  |         |       |  |            |  |      |            |  |  |            |  |  |         |      |   |            |  |       |  |  |  |      |  
|                                                            |  |       |  |         |       |  |           
|Joint ventures                                              |  |       |  |         | 67    |  |            |  |     |            |  |  | 72         |  |  |         |     |   |            |  | 186   |  |  |  |     |  
|Related companies                                           |  | 26.2  |  |         | 409   |  |            |  |     |            |  |  | 663        |  |  |         |     |   |            |  | 216   |  |  |  | 450  |  
|Tax credits                                                 |  |       |  |         | 364   |  |            |  | 79   |            |  |  | 121        |  |  |         | 80   |   |            |  | 320   |  |  |  | 26   |  
|Deferred tax assets                                         |  |       |  |         |      |  |            |  |     |            |  |  |           |  |  |         |     |   |            |  |      |  |  |  |     |  
|Receivables from the sale of companies                      |  |       |  |         |      |  |            |  |     |            |  |  | 29         |  |  |         |     |   |            |  | 41    |  |  |  |     |  
|Contractual credit in Ecuador                               |  | 28    |  |         | 347   |  |            |  |     |            |  |  | 263        |  |  |         |     |   |            |  |      |  |  |  | 442  |  
|Expenses reimbursements                                     |  |       |  |         | 2     |  |            |  |     |            |  |  | 2          |  |  |         |     |   |            |  | 1     |  |  |  | 5    |  
|Prepaid expenses                                            |  |       |  |         | 75    |  |            |  | 13   |            |  |  | 169        |  |  |         | 13   |   |            |  | 141   |  |  |  | 10   |  
|Credit for new projects in the mixed companies in Venezuela |  | 13.2  |  |         |      |  |            |  | 574  |            |  |  |           |  |  |         | 434  |   |            |  |      |  |  |  | 380  |  
|Guarantee deposits                                          |  |       |  |         | 7     |  |            |  | 40   |            |  |  | 6          |  |  |         | 40   |   |            |  | 3     |  |  |  | 29   |  
|Allowance for other receivables                             |  | (1)   |  |         |      |  |            |  | (574 | )          |  |  |           |  |  |         | (434 | ) |            |  |      |  |  |  | (523 | )
|Other                                                       |  |       |  |         | 280   |  |            |  | 113  |            |  |  | 228        |  |  |         | 105  |   |            |  | 162   |  |  |  | 77   |  
|                                                            |  |       |  |         |       |  |            |  |      |            |  |  |            |  |  |         |      |   |            |  |       |  |  |  |      |  
|                                                            |  | (2)   |  |         | 1,551 |  |            |  | 245  |            |  |  | 1,553      |  |  |         | 238  |   |            |  | 1,070 |  |  |  | 896  |  
|                                                            |  |       |  |         |       |  |            |  |      |            |  |  |            |  |  |         |      |   |            |  |       |  |  |  |      |  



|(1) | Activity of (140), (54) y (28) in the years ended December 31, 2013, 2012 and 2011 are shown under Other comprehensive income,
respectively. As of December 31, 2012 includes 143 related to write-offs.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | As of December 31, 2013, 2012 and January 1, 2012 current receivables include an average of 4% of non provisioned due, which do not exceed a
period of 3 months.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------



|16. | Inventories
|--- | -----------



|                                    |  |         |       |  |             |  |    |            |  |  |             |  |  |         |    |  |             |  |     |  |  |  |    | 
|----------------------------------- |  | ------- | ----- |  | ----------- |  | -- | ---------- |  |  | ----------- |  |  | ------- | -- |  | ----------- |  | --- |  |  |  | -- | 
|                                    |  | 2013    |       |  | 2012        |  |    | 01.01.2012 | 
|                                    |  | Current |       |  | Non-current |  |    | Current    |  |  | Non-current |  |  | Current |    |  | Non-current | 
|                                    |  |         |       |  |             | 
|Crude oil stock                     |  |         | 228   |  |             |  |   |            |  |  | 176         |  |  |         |   |  |             |  | 206 |  |  |  |   | 
|Raw materials and materials         |  |         | 426   |  |             |  | 58 |            |  |  | 297         |  |  |         | 45 |  |             |  | 267 |  |  |  | 39 | 
|Work progress and finished products |  |         | 656   |  |             |  |   |            |  |  | 550         |  |  |         |   |  |             |  | 497 |  |  |  |   | 
|                                    |  |         |       |  |             |  |    |            |  |  |             |  |  |         |    |  |             |  |     |  |  |  |    | 
|                                    |  |         | 1,310 |  |             |  | 58 |            |  |  | 1,023       |  |  |         | 45 |  |             |  | 970 |  |  |  | 39 | 
|                                    |  |         |       |  |             |  |    |            |  |  |             |  |  |         |    |  |             |  |     |  |  |  |    | 



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|17. | Property, plant and equipment
|--- | -----------------------------

Changes in property, plant and equipment



|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|--------------------------- |  | ----- | ---- | - | ----------------------------------------------------------- |  | ------ | ----------------------------- |  |  | ------------------------- | - |  | ---------------- | ----- |  | --------------- |  | ----- | ----- |  |  | ------ | - |  |  | ----- | - |  |  | ------ | -
|                            |  | Notes |      |   | Production wells,exploratory wellsand oil and gasproperties |  |        | Machinery,tools andequipments |  |  | Electricygenerationplants |   |  | Industrialplants |       |  | Work inprogress |  |       | Other |  |  | Total  |  
|Cost                        |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|01/01/2012                  |  |       |      |   |                                                             |  | 8,896  |                               |  |  | 4,129                     |   |  |                  | 1,134 |  |                 |  | 1,086 |       |  |  | 1,021  |   |  |  | 1,748 |   |  |  | 18,014 |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|                            |  |       |      |   |                                                             |  |        |                              
|Translation effect          |  |       |      |   |                                                             |  | 168    |                               |  |  | 4                         |   |  |                  |      |  |                 |  |      |       |  |  | 15     |   |  |  | 4     |   |  |  | 191    |  
|Adquisition or PELSA        |  |       | 13.5 |   |                                                             |  | 1,090  |                               |  |  |                          |   |  |                  |      |  |                 |  |      |       |  |  | 88     |   |  |  | 36    |   |  |  | 1,214  |  
|Additions                   |  |       |      |   |                                                             |  | 207    |                               |  |  | 7                         |   |  |                  |      |  |                 |  | 4     |       |  |  | 1,515  |   |  |  | 261   |   |  |  | 1,994  |  
|Net decreases and transfers |  |       |      |   |                                                             |  | 1,296  |                               |  |  | 226                       |   |  |                  | 31    |  |                 |  | 66    |       |  |  | (1,595 | ) |  |  | (220  | ) |  |  | (196   | )
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|12/31/2012                  |  |       |      |   |                                                             |  | 11,657 |                               |  |  | 4,366                     |   |  |                  | 1,165 |  |                 |  | 1,156 |       |  |  | 1,044  |   |  |  | 1,829 |   |  |  | 21,217 |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|                            |  |       |      |   |                                                             |  |        |                              
|Translation effect          |  |       |      |   |                                                             |  | 597    |                               |  |  | 10                        |   |  |                  |      |  |                 |  |      |       |  |  | 15     |   |  |  | 20    |   |  |  | 642    |  
|Additions                   |  |       |      |   |                                                             |  | 360    |                               |  |  | 4                         |   |  |                  |      |  |                 |  | 1     |       |  |  | 2,196  |   |  |  | 180   |   |  |  | 2,741  |  
|Net decreases and transfers |  |       | (1   | ) |                                                             |  | 1,821  |                               |  |  | 76                        |   |  |                  | 19    |  |                 |  | 187   |       |  |  | (1,990 | ) |  |  | (68   | ) |  |  | 45     |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|12/31/2013                  |  |       |      |   |                                                             |  | 14,435 |                               |  |  | 4,456                     |   |  |                  | 1,184 |  |                 |  | 1,344 |       |  |  | 1,265  |   |  |  | 1,961 |   |  |  | 24,645 |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|                            |  |       |      |   |                                                             |  |        |                              
|Depreciation                |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|01/01/2012                  |  |       |      |   |                                                             |  | 5,711  |                               |  |  | 3,188                     |   |  |                  | 498   |  |                 |  | 414   |       |  |  |       |   |  |  | 1,147 |   |  |  | 10,958 |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|                            |  |       |      |   |                                                             |  |        |                              
|Translation effect          |  |       |      |   |                                                             |  | 52     |                               |  |  | 1                         |   |  |                  |      |  |                 |  |      |       |  |  |       |   |  |  | 1     |   |  |  | 54     |  
|Net decreases               |  |       |      |   |                                                             |  |       |                               |  |  | (3                        | ) |  |                  |      |  |                 |  |      |       |  |  |       |   |  |  | (10   | ) |  |  | (13    | )
|Depreciation                |  |       |      |   |                                                             |  | 1,220  |                               |  |  | 301                       |   |  |                  | 85    |  |                 |  | 73    |       |  |  |       |   |  |  | 59    |   |  |  | 1,738  |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|12/31/2012                  |  |       |      |   |                                                             |  | 6,983  |                               |  |  | 3,487                     |   |  |                  | 583   |  |                 |  | 487   |       |  |  |       |   |  |  | 1,197 |   |  |  | 12,737 |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|                            |  |       |      |   |                                                             |  |        |                              
|Translation effect          |  |       |      |   |                                                             |  | 195    |                               |  |  | 3                         |   |  |                  |      |  |                 |  |      |       |  |  |       |   |  |  | 6     |   |  |  | 204    |  
|Net decreases               |  |       |      |   |                                                             |  |       |                               |  |  | (10                       | ) |  |                  |      |  |                 |  |      |       |  |  |       |   |  |  | (4    | ) |  |  | (14    | )
|Depreciation                |  |       |      |   |                                                             |  | 1,656  |                               |  |  | 308                       |   |  |                  | 87    |  |                 |  | 72    |       |  |  |       |   |  |  | 71    |   |  |  | 2,194  |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|12/31/2013                  |  |       |      |   |                                                             |  | 8,834  |                               |  |  | 3,788                     |   |  |                  | 670   |  |                 |  | 559   |       |  |  |       |   |  |  | 1,270 |   |  |  | 15,121 |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|                            |  |       |      |   |                                                             |  |        |                              
|Net book value 12/31/2013   |  |       |      |   |                                                             |  | 5,601  |                               |  |  | 668                       |   |  |                  | 514   |  |                 |  | 785   |       |  |  | 1,265  |   |  |  | 691   |   |  |  | 9,524  |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|Net book value 12/31/2012   |  |       |      |   |                                                             |  | 4,674  |                               |  |  | 879                       |   |  |                  | 582   |  |                 |  | 669   |       |  |  | 1,044  |   |  |  | 632   |   |  |  | 8,480  |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  
|Net book value 01/01/2012   |  |       |      |   |                                                             |  | 3,185  |                               |  |  | 941                       |   |  |                  | 636   |  |                 |  | 672   |       |  |  | 1,021  |   |  |  | 601   |   |  |  | 7,056  |  
|                            |  |       |      |   |                                                             |  |        |                               |  |  |                           |   |  |                  |       |  |                 |  |       |       |  |  |        |   |  |  |       |   |  |  |        |  



|(1) | Decreases on the category for the year ending production wells, exploratory wells and oil and gas property on December 31, 2013
includes 11 impairment Santa Cruz area II, charged in Other operating expenses (Note 9).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|18. | Discontinued operations and assets classified as held for sale
|--- | --------------------------------------------------------------

18.1. San Lorenzo refinery and other assets related to the Refining and Distribution business

On May 4, 2010 the Companys Board of Directors approved the terms and conditions of the agreement for the sale
of the San Lorenzo Refinery to Oil Combustibles S.A. (a non related entity), the loading and unloading facilities and the associated gas stations network. The price of the transaction was US$102 million, including these assets and inventories of oil
and oil related products. The transaction became effective on May 2, 2011 and it is subject to approval by the Argentine Antitrust Authorities.

18.2. INNOVA

In March 2011, the Company, through
its subsidiary Petrobras Energía Internacional S.A., sold to Petróleo Brasileiro S.A. its equity interest in Innova S.A., which resulted in the discontinuation of its operations in Brazil. The price of the transaction was US$
332 million and the Company recognized income before income tax of 723, included in Income from discontinued operations (net of income tax) and the transfer of Other comprehensive income to income of 134.

The table below shows the breakdown of consolidated statements of income and the most relevant information of the
consolidated cash flows for the three-months ended December 31, 2011 for the discontinued operations:



|                                    |  |  |      |  
|----------------------------------- |  |  | ---- | -
|Sales                               |  |  | 699  |  
|Cost of sales                       |  |  | (538 | )
|                                    |  |  |      |  
|Gross profit                        |  |  | 161  |  
|                                    | 
|Administrative and selling expenses |  |  | (118 | )
|Other operating expenses, net       |  |  | 760  |  
|                                    |  |  |      |  
|Operating income                    |  |  | 803  |  
|                                    | 
|Financial results                   |  |  |      |  
|Financial income                    |  |  | 10   |  
|Financial costs                     |  |  | (11  | )
|                                    |  |  |      |  
|Income (loss) before income tax     |  |  | 802  |  
|                                    | 
|Income tax                          |  |  | (96  | )
|                                    |  |  |      |  
|                                    | 
|Net income                          |  |  | 706  |  
|                                    |  |  |      |  



|                                                       |  |  |     |  
|------------------------------------------------------ |  |  | --- | -
|Cash and cash equivalents at the beginning of the year |  |  | 89  |  
|                                                       | 
|Net cash (used in) provided in operations              |  |  | (17 | )
|                                                       | 
|Net cash used in investing activities                  |  |  | (77 | )
|                                                       | 
|Net cash provided by (used in) financing activities    |  |  | 4   |  
|                                                       | 
|Effect of exchange rate change on cash                 |  |  | 1   |  
|                                                       | 
|Cash and cash equivalents at the end of the year       |  |  |    |  
|                                                       | 
|For the three-months as of March 31, 2011              |  |  |     |  



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|19. | Capital stock
|--- | -------------

As of December 31, 2013, the Companys capital stock amounted to 2,019, fully subscribed, issued, paid-in and authorized for public trading.

Changes in capital stock in the last three fiscal years:



|                                                       |  |      |       |  |      |  |       |      |  |  |       | 
|------------------------------------------------------ |  | ---- | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                                                       |  | 2013 |       |  | 2012 |  |       | 2011 | 
|Common shares of 1 vote and face value of $1 per share |  |      | 2,019 |  |      |  | 2,019 |      |  |  | 1,010 | 
|                                                       |  |      |       |  |      |  |       |      |  |  |       | 

The Companys Shareholders Meeting held on March 29, 2012 resolved to
capitalize retained earnings of 1,009, through the issue of 1,009,618,410 common shares of a N/V of P$1 and entitled to one vote per share. On 4 September 2012 the CNV and the Stock Exchange of Buenos Aires authorized the issuance of such
registration.



|20. | Unappropriated retained earnings
|--- | --------------------------------



|                                      |  |       |  |      |      |   |      |  |        |      |  |  |       |  
|------------------------------------- |  | ----- |  | ---- | ---- | - | ---- |  | ------ | ---- |  |  | ----- | -
|                                      |  | Notes |  | 2013 |      |   | 2012 |  |        | 2011 | 
|                                      |  |       |  |     
|Balances at the beginning of the year |  |       |  |      | 528  |   |      |  | 6,635  |      |  |  | 6,150 |  
|                                      |  |       |  |     
|Cash dividends                        |  |       |  |      |     |   |      |  |       |      |  |  | (183  | )
|Capitalization                        |  | (1)   |  |      |     |   |      |  | (1,009 | )    |  |  |      |  
|Legal reserve                         |  | (1)   |  |      | (32  | ) |      |  | (35    | )    |  |  |      |  
|Reserve for future investments        |  | (1)   |  |      | (162 | ) |      |  | (4,781 | )    |  |  |      |  
|Reserve for future dividends          |  | (1)   |  |      | (361 | ) |      |  | (900   | )    |  |  |      |  
|Income attributable to shareholders   |  |       |  |      | 779  |   |      |  | 618    |      |  |  | 668   |  
|                                      |  |       |  |      |      |   |      |  |        |      |  |  |       |  
|Balances at the end of the year       |  |       |  |      | 752  |   |      |  | 528    |      |  |  | 6,635 |  
|                                      |  |       |  |      |      |   |      |  |        |      |  |  |       |  



| | (1) | The Companys Shareholders Meeting held on March 29, 2012 resolved to distribute retained earnings totaling 6,725 of
December 31, 2011, according to the local regulations effective as of that date.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Following the implementation of IFRS, the Company recognized a reduction in Unappropiated retained earning. The terms of
the General Resolution No. 609 of the CNV are not applicable.



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|21. | Other items of equity
|--- | ---------------------

21.1 Other reserves



|                                       |  |      |       |  |      |  |       |            |  |  |     | 
|-------------------------------------- |  | ---- | ----- |  | ---- |  | ----- | ---------- |  |  | --- | 
|                                       |  | 2013 |       |  | 2012 |  |       | 01.01.2012 | 
|                                       |  |      |      
|Legal reserve                          |  |      | 515   |  |      |  | 483   |            |  |  | 448 | 
|Optional reserve for future investment |  |      | 4,943 |  |      |  | 4,781 |            |  |  |    | 
|Reserve for future dividends           |  |      | 1,050 |  |      |  | 689   |            |  |  |    | 
|                                       |  |      |       |  |      |  |       |            |  |  |     | 
|                                       |  |      | 6,508 |  |      |  | 5,953 |            |  |  | 448 | 
|                                       |  |      |       |  |      |  |       |            |  |  |     | 

21.2 Other comprehensive income



|                                                      |  |      |      |   |      |  |      |  
|----------------------------------------------------- |  | ---- | ---- | - | ---- |  | ---- | -
|                                                      |  | 2013 |      |   | 2012 | 
|Effect of exchange rate change                        |  |      | 742  |   |      |  | 295  |  
|Income tax on the effect of exchange rate fluctuation |  |      | (591 | ) |      |  | (251 | )
|Actuarial profits and loss                            |  |      | 58   |   |      |  | 43   |  
|Income Tax on actuarial gains and losses              |  |      | (20  | ) |      |  | (15  | )
|                                                      |  |      |      |   |      |  |      |  
|                                                      |  |      | 189  |   |      |  | 72   |  
|                                                      |  |      |      |   |      |  |      |  



|22. | Financial loans
|--- | ---------------

22.1. Global programs of non-convertible bonds

Global program of US$ 2.5
billion:

As of December 31, 2013 the following classes of bonds issued under this program remained
outstanding: Class S, for a face value of US$ 300 million, maturing in May 2017, at a 5.875% annual rate. Class S bonds are collateralized by a Standby Purchase Agreement provided by Petróleo Brasileiro, pursuant to which, in the event
of failure to pay principal, interest and any other amount owed by Petrobras Argentina in connection with Class S bonds, Petróleo Brasileiro shall purchase the rights of bondholders to receive payments.

The proceeds from the bonds were used to refinance liabilities, increase working capital, and make capital expenditures
in Argentina and capital contributions to associates.

Bond debt is presented net of the unaccrued portion of
the issuance discounts and the incurred costs for such issuances.

Global program of US$ 500 million:

The Extraordinary Shareholders of Petrobras Argentina held on March 21, 2013 approved the creation of a global
program for the issuance of bonds for an outstanding maximum principal amounting to US$ 500 million or its equivalent in any other currency, expiring within 5 years, or the maximum term that may be established by any applicable regulation in
the future.

The creation of the program was authorized by Resolution No. 17,162 of the CNV of 15 Augusts
2013. No notes were issued as of the date of these financial statements.



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22.2. Cross default clauses

Companys outstanding bonds and other financial indebtedness include cross default provisions whereby the Trustee, as
instructed by the bondholders representing at least 25% of the related outstanding capital, in the case of corporate bonds or the lender, as the case may be, may declare all the amounts owed to be due and payable if payment of any debt of ours or
our significant subsidiaries is accelerated or is not made when due, provided that those amounts exceed the higher of US$25 million or 1% of Petrobras Argentinas shareholders equity upon those maturities, and that the default has not
been defeated or cured within the applicable legal and / or contractual terms.

As of the date of these
financial statements, Petrobras Argentina has complied with all terms and conditions related to its financial indebtedness.

22.3. Composition

The breakdown of the financial debt as of December 31, 2013, 2012 and January 1, 2012, is as follows:



|                       |  |  |  |         |     |  |            |  |       |            |  |  |            |  |  |         |       |  |            |  |    |  |  |  |       | 
|---------------------- |  |  |  | ------- | --- |  | ---------- |  | ----- | ---------- |  |  | ---------- |  |  | ------- | ----- |  | ---------- |  | -- |  |  |  | ----- | 
|                       |  |  |  | 2013    |     |  | 2012       |  |       | 01.01.2012 | 
|                       |  |  |  | Current |     |  | Noncurrent |  |       | Current    |  |  | Noncurrent |  |  | Current |       |  | Noncurrent | 
|Financial institutions |  |  |  |         | 193 |  |            |  | 81    |            |  |  | 100        |  |  |         | 89    |  |            |  | 16 |  |  |  | 38    | 
|Bonds                  |  |  |  |         | 15  |  |            |  | 1,943 |            |  |  | 1,008      |  |  |         | 1,469 |  |            |  | 24 |  |  |  | 2,144 | 
|                       |  |  |  |         |     |  |            |  |       |            |  |  |            |  |  |         |       |  |            |  |    |  |  |  |       | 
|                       |  |  |  |         | 208 |  |            |  | 2,024 |            |  |  | 1,108      |  |  |         | 1,558 |  |            |  | 40 |  |  |  | 2,182 | 
|                       |  |  |  |         |     |  |            |  |       |            |  |  |            |  |  |         |       |  |            |  |    |  |  |  |       | 

Loans activity

Activity in loans and financing during 2013, 2012 and 2011 are as follows:



|                                            |  |       |      |  |      |  |        |      |  |  |       |   |  |  |        |  
|------------------------------------------- |  | ----- | ---- |  | ---- |  | ------ | ---- |  |  | ----- | - |  |  | ------ | -
|                                            |  | Notes |      |  | 2013 |  |        | 2012 |  |  | 2011  |  
|                                            |  |       |      | 
|Beginning balance                           |  |       |      |  |      |  | 2,666  |      |  |  | 2,222 |   |  |  | 3,987  |  
|                                            |  |       |      | 
|Petrolera Entre Lomas S.A.s consolidation  |  |       |      |  |      |  |       |      |  |  | 191   |   |  |  |       |  
|Sale of Innova                              |  |       | 18.2 |  |      |  |       |      |  |  |      |   |  |  | (216   | )
|Net increase (decrease) in short term loans |  |       |      |  |      |  | 96     |      |  |  | 2     |   |  |  | (5     | )
|Accrued interest                            |  |       |      |  |      |  | 212    |      |  |  | 199   |   |  |  | 206    |  
|Effect of exchange rate change              |  |       |      |  |      |  | 727    |      |  |  | 315   |   |  |  | 208    |  
|Interest paid                               |  |       |      |  |      |  | (216   | )    |  |  | (178  | ) |  |  | (215   | )
|Increase in long term loans                 |  |       |      |  |      |  | 49     |      |  |  |      |   |  |  |       |  
|Long-term loans paid                        |  |       |      |  |      |  | (1,302 | )    |  |  | (85   | ) |  |  | (1,747 | )
|Discontinued operations                     |  |       | 18.2 |  |      |  |       |      |  |  |      |   |  |  | 4      |  
|                                            |  |       |      |  |      |  |        |      |  |  |       |   |  |  |        |  
|Ending balance                              |  |       |      |  |      |  | 2,232  |      |  |  | 2,666 |   |  |  | 2,222  |  
|                                            |  |       |      |  |      |  |        |      |  |  |       |   |  |  |        |  



F-59



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PETROBRAS ARGENTINA S.A.



Short and Long-term loans

The financial loans outstanding as of December 31, 2013 are as follows:



|                        |  |        |       |  |          |     |                      |              
|----------------------- |  | ------ | ----- |  | -------- | --- | -------------------- | -------------
|Type                    |  | Amount |       |  | Currency |     | Annual interest rate
|Current Liabilities     |  |        |       |  |          |     |                      |              
|Financial institutions  |  |        |       |  |          |     |                      |              
|                        |  |        | 98    |  |          | USD |                      | Libo + 1,95% 
|                        |  |        | 42    |  |          | USD |                      | Libo + 2,90% 
|                        |  |        | 23    |  |          | USD |                      | Libo + 1,445%
|                        |  |        | 21    |  |          | USD |                      | Libo + 2,955%
|                        |  |        | 6     |  |          | $   |                      | 15.25%       
|                        |  |        | 3     |  |          | USD |                      | Libo + 3,5%  
|                        |  |        |      
|Bonds                   |  |        |       |  |          |     |                      |              
|Class S                 |  |        | 15    |  |          | USD |                      | 5,875%       
|                        |  |        |       |  |          |     |                      |              
|                        |  |        | 208   |  |          |     |                      |              
|                        |  |        |       |  |          |     |                      |              
|                        |  |        |      
|Non Current Liabilities |  |        |       |  |          |     |                      |              
|Financial institutions  |  |        |       |  |          |     |                      |              
|                        |  |        | 12    |  |          | USD |                      | Libo + 1.445%
|                        |  |        | 48    |  |          | $   |                      | 15.25%       
|                        |  |        | 21    |  |          | USD |                      | Libo + 3.55% 
|                        |  |        |      
|Bonds                   |  |        |       |  |          |     |                      |              
|Class S                 |  |        | 1,943 |  |          | USD |                      | 5,875%       
|                        |  |        |       |  |          |     |                      |              
|                        |  |        | 2,024 |  |          |     |                      |              
|                        |  |        |       |  |          |     |                      |              

The maturities of the long-term financial loans as of December 31, 2013, are as
follows:



|                  |  |  |       | 
|----------------- |  |  | ----- | 
|Less than 1 year  |  |  | 208   | 
|From 1 to 2 years |  |  | 55    | 
|From 2 to 3 years |  |  | 26    | 
|Over 3 years      |  |  | 1,943 | 
|                  |  |  |       | 
|                  |  |  | 2,232 | 
|                  |  |  |       | 



|23. | Current and deferred income tax
|--- | -------------------------------

The Companys tax expense and deferred tax balances are as follows:



|                        |  |                    |      |   |        |  |      |             |  |  |                    |   |  |             |      |   |       |  |      |                    |  |  |        |   |  |       |      |   |  |  |     |   |  |  |      |  
|----------------------- |  | ------------------ | ---- | - | ------ |  | ---- | ----------- |  |  | ------------------ | - |  | ----------- | ---- | - | ----- |  | ---- | ------------------ |  |  | ------ | - |  | ----- | ---- | - |  |  | --- | - |  |  | ---- | -
|                        |  | 2013               |      |   | 2012   |  |      | 2011        | 
|                        |  | Recorded in        |      |   |        |  |      | Recorded in |  |  |                    |   |  | Recorded in |      |   |       | 
|                        |  | Statement ofincome |      |   | OCI(1) |  |      | Total       |  |  | Statement ofincome |   |  | OCI(1)      |      |   | Total |  |      | Statement ofincome |  |  | OCI(1) |   |  | Total |     
|                        |  |                    |      |   |        |  |      |             | 
|Income tax for the year |  |                    |      |   |        |  |      |             |  |  |                    |   |  |             |      |   |       |  |      |                    |  |  |        |   |  |       |      |   |  |  |     |   |  |  |      |  
|Current                 |  |                    | (703 | ) |        |  | 330  |             |  |  | (373               | ) |  |             | (579 | ) |       |  | 121  |                    |  |  | (458   | ) |  |       | (238 | ) |  |  | 71  |   |  |  | (167 | )
|Deferred                |  |                    | 151  |   |        |  | (345 | )           |  |  | (194               | ) |  |             | 87   |   |       |  | (124 | )                  |  |  | (37    | ) |  |       | 223  |   |  |  | (77 | ) |  |  | 146  |  
|                        |  |                    |      |   |        |  |      |             |  |  |                    |   |  |             |      |   |       |  |      |                    |  |  |        |   |  |       |      |   |  |  |     |   |  |  |      |  
|Total income tax        |  |                    | (552 | ) |        |  | (15  | )           |  |  | (567               | ) |  |             | (492 | ) |       |  | (3   | )                  |  |  | (495   | ) |  |       | (15  | ) |  |  | (6  | ) |  |  | (21  | )
|                        |  |                    |      |   |        |  |      |             |  |  |                    |   |  |             |      |   |       |  |      |                    |  |  |        |   |  |       |      |   |  |  |     |   |  |  |      |  



|(1) | It relates to the tax effect of exchange differences resulting from: (i) revaluation of net investments in foreign operations (with effect on
deferred tax), and (ii) revaluation of indebtedness denominated in foreign currency designated as hedge for that investment (with effect on current tax).
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|-------------------- |  | ---------- |  | ----- | ---- |  | ---------------------- |  | --- | ---------------------- |  |  | ----------------------- | - |  | --------------------------- | --- | - | --------------------------- |  | --- | ------------ |  |  | ----- | - |  | ------------------ | --- | - | ------------ |  | --- | - |  |  | ---- | - |  |  | --- | -
|Deferred tax assets  |  |            |  | Notes |      |  | Carryforwardtax losses |  |     | Reserves andprovisions |  |  | Pension planobligations |   |  | Equityinterest inaffiliates |     |   | Property,plant andequipment |  |     | OtherCredits |  |  | Other |   |  | Valuationallowance |     |   | Total assets | 
|                     |  |            |  |       |      |  |                        |  |     |                        | 
|                     |  | 12/31/2010 |  |       |      |  |                        |  | 67  |                        |  |  | 70                      |   |  |                             | 48  |   |                             |  | 42  |              |  |  |      |   |  |                    | 123 |   |              |  | 73  |   |  |  | (232 | ) |  |  | 191 |  
|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|                     |  |            |  |       |      |  |                        |  |     |                        | 
|Recorder in          |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|Statement of income  |  |            |  |       |      |  |                        |  | (56 | )                      |  |  | 86                      |   |  |                             | 21  |   |                             |  | (14 | )            |  |  |      |   |  |                    | 12  |   |              |  | (6  | ) |  |  | 83   |   |  |  | 126 |  
|Equity               |  |            |  |       |      |  |                        |  |    |                        |  |  |                        |   |  |                             | (7  | ) |                             |  |    |              |  |  |      |   |  |                    |    |   |              |  |    |   |  |  |     |   |  |  | (7  | )
|Sale of Innova       |  |            |  |       | 18.2 |  |                        |  |    |                        |  |  |                        |   |  |                             |    |   |                             |  |    |              |  |  |      |   |  |                    | (3  | ) |              |  |    |   |  |  |     |   |  |  | (3  | )
|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|                     |  |            |  |       |      |  |                        |  |     |                        | 
|                     |  | 12/31/2011 |  |       |      |  |                        |  | 11  |                        |  |  | 156                     |   |  |                             | 62  |   |                             |  | 28  |              |  |  |      |   |  |                    | 132 |   |              |  | 67  |   |  |  | (149 | ) |  |  | 307 |  
|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|                     |  |            |  |       |      |  |                        |  |     |                        | 
|Recorder in          |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|Statement of income  |  |            |  |       |      |  |                        |  | (9  | )                      |  |  | (54                     | ) |  |                             | 21  |   |                             |  | (25 | )            |  |  | (2    | ) |  |                    | 19  |   |              |  | 23  |   |  |  | (13  | ) |  |  | (40 | )
|Equity               |  |            |  |       |      |  |                        |  |    |                        |  |  |                        |   |  |                             | 3   |   |                             |  |    |              |  |  |      |   |  |                    |    |   |              |  | 2   |   |  |  |     |   |  |  | 5   |  
|Acquisition of PELSA |  |            |  |       | 13.5 |  |                        |  |    |                        |  |  | 3                       |   |  |                             | 10  |   |                             |  |    |              |  |  | 5     |   |  |                    |    |   |              |  |    |   |  |  |     |   |  |  | 18  |  
|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|                     |  |            |  |       |      |  |                        |  |     |                        | 
|                     |  | 12/31/2012 |  |       |      |  |                        |  | 2   |                        |  |  | 105                     |   |  |                             | 96  |   |                             |  | 3   |              |  |  | 3     |   |  |                    | 151 |   |              |  | 92  |   |  |  | (162 | ) |  |  | 290 |  
|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|                     |  |            |  |       |      |  |                        |  |     |                        | 
|Recorder in          |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|Statement of income  |  |            |  |       |      |  |                        |  | 121 |                        |  |  | (56                     | ) |  |                             | 32  |   |                             |  | 6   |              |  |  | 3     |   |  |                    | 49  |   |              |  | (25 | ) |  |  | (130 | ) |  |  |    |  
|Equity               |  |            |  |       |      |  |                        |  |    |                        |  |  |                        |   |  |                             | (5  | ) |                             |  |    |              |  |  |      |   |  |                    |    |   |              |  |    |   |  |  | (44  | ) |  |  | (49 | )
|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  
|                     |  |            |  |       |      |  |                        |  |     |                        | 
|                     |  | 12/31/2013 |  |       |      |  |                        |  | 123 |                        |  |  | 49                      |   |  |                             | 123 |   |                             |  | 9   |              |  |  | 6     |   |  |                    | 200 |   |              |  | 67  |   |  |  | (336 | ) |  |  | 241 |  
|                     |  |            |  |       |      |  |                        |  |     |                        |  |  |                         |   |  |                             |     |   |                             |  |     |              |  |  |       |   |  |                    |     |   |              |  |     |   |  |  |      |   |  |  |     |  



|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|------------------------ |  | ---------- |  |  | ---- |  | ------------------------------------------ |  | ---- | ----- |  |  | --------------- | - |  | ---------------------------- | -- | - | ----- |  | ---- | ---------------- |  |  | ---- | - |  |  | ---- | -
|Deferred tax liabilities |  |            |  |  |      |  | Property,plant andequipmentand otherassets |  |      | Loans |  |  | Prepaidexpenses |   |  | Equityinterest 
inaffiliates |    |   | Other |  |      | Totalliabilities | 
|                         |  |            |  |  |      |  |                                            | 
|                         |  | 12/31/2010 |  |  |      |  |                                            |  | (226 | )     |  |  | (12             | ) |  |                              | (5 | ) |       |  | (336 | )                |  |  | (14  | ) |  |  | (593 | )
|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|                         |  |            |  |  |      |  |                                            | 
|Recorder in              |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|Statement of income      |  |            |  |  |      |  |                                            |  | (1   | )     |  |  |                |   |  |                              | 1  |   |       |  | 128  |                  |  |  | (31  | ) |  |  | 97   |  
|Equity                   |  |            |  |  |      |  |                                            |  |     |       |  |  |                |   |  |                              |   |   |       |  | (70  | )                |  |  |     |   |  |  | (70  | )
|Sale of Innova           |  |            |  |  | 18.2 |  |                                            |  |     |       |  |  | 12              |   |  |                              |   |   |       |  |     |                  |  |  |     |   |  |  | 12   |  
|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|                         |  |            |  |  |      |  |                                            | 
|                         |  | 12/31/2011 |  |  |      |  |                                            |  | (227 | )     |  |  |                |   |  |                              | (4 | ) |       |  | (278 | )                |  |  | (45  | ) |  |  | (554 | )
|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|                         |  |            |  |  |      |  |                                            | 
|Recorder in              |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|Statement of income      |  |            |  |  |      |  |                                            |  | 119  |       |  |  |                |   |  |                              | 2  |   |       |  | 36   |                  |  |  | (30  | ) |  |  | 127  |  
|Equity                   |  |            |  |  |      |  |                                            |  |     |       |  |  |                |   |  |                              |   |   |       |  | (121 | )                |  |  | (8   | ) |  |  | (129 | )
|Acquisition of PELSA     |  |            |  |  | 13.5 |  |                                            |  | (14  | )     |  |  |                |   |  |                              |   |   |       |  |     |                  |  |  | (74  | ) |  |  | (88  | )
|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|                         |  |            |  |  |      |  |                                            | 
|                         |  | 12/31/2012 |  |  |      |  |                                            |  | (122 | )     |  |  |                |   |  |                              | (2 | ) |       |  | (363 | )                |  |  | (157 | ) |  |  | (644 | )
|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|                         |  |            |  |  |      |  |                                            | 
|Recorder in              |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|Statement of income      |  |            |  |  |      |  |                                            |  | 151  |       |  |  |                |   |  |                              | 1  |   |       |  | 194  |                  |  |  | (195 | ) |  |  | 151  |  
|Equity                   |  |            |  |  |      |  |                                            |  |     |       |  |  |                |   |  |                              |   |   |       |  | (340 | )                |  |  | 44   |   |  |  | (296 | )
|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  
|                         |  |            |  |  |      |  |                                            | 
|                         |  | 12/31/2013 |  |  |      |  |                                            |  | 29   |       |  |  |                |   |  |                              | (1 | ) |       |  | (509 | )                |  |  | (308 | ) |  |  | (789 | )
|                         |  |            |  |  |      |  |                                            |  |      |       |  |  |                 |   |  |                              |    |   |       |  |      |                  |  |  |      |   |  |  |      |  



|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|-------------------- |  | ---------- |  |  | ---- |  | ------------------ |  | --- | ----------------------- |  |  | ----- | - |  |  | ---- | -
|                     |  |            |  |  |      |  | Deferred taxassets |  |     | Deferred taxliabilities |  |  | Total |  
|                     |  |            |  |  |     
|                     |  | 12/31/2010 |  |  |      |  |                    |  | 191 |                         |  |  | (593  | ) |  |  | (402 | )
|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|                     |  |            |  |  |     
|Recorder in          |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|Statement of income  |  |            |  |  |      |  |                    |  | 126 |                         |  |  | 97    |   |  |  | 223  |  
|Equity               |  |            |  |  |      |  |                    |  | (7  | )                       |  |  | (70   | ) |  |  | (77  | )
|Sale of Innova       |  |            |  |  | 18.2 |  |                    |  | (3  | )                       |  |  | 12    |   |  |  | 9    |  
|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|                     |  |            |  |  |     
|                     |  | 12/31/2011 |  |  |      |  |                    |  | 307 |                         |  |  | (554  | ) |  |  | (247 | )
|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|                     |  |            |  |  |     
|Recorder in          |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|Statement of income  |  |            |  |  |      |  |                    |  | (40 | )                       |  |  | 127   |   |  |  | 87   |  
|Equity               |  |            |  |  |      |  |                    |  | 5   |                         |  |  | (129  | ) |  |  | (124 | )
|Acquisition of PELSA |  |            |  |  | 13.5 |  |                    |  | 18  |                         |  |  | (88   | ) |  |  | (70  | )
|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|                     |  |            |  |  |     
|                     |  | 12/31/2012 |  |  |      |  |                    |  | 290 |                         |  |  | (644  | ) |  |  | (354 | )
|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|                     |  |            |  |  |     
|Recorder in          |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|Statement of income  |  |            |  |  |      |  |                    |  |    |                         |  |  | 151   |   |  |  | 151  |  
|Equity               |  |            |  |  |      |  |                    |  | (49 | )                       |  |  | (296  | ) |  |  | (345 | )
|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  
|                     |  |            |  |  |     
|                     |  | 12/31/2013 |  |  |      |  |                    |  | 241 |                         |  |  | (789  | ) |  |  | (548 | )
|                     |  |            |  |  |      |  |                    |  |     |                         |  |  |       |   |  |  |      |  



|(1) | Management evaluates the recoverability of carryforward tax losses and the remaining temporary differences taking into consideration, among other
elements, the projected net income, tax planning strategies, timeliness of future taxable income, the date of expiration of the carryforward tax losses, the future reversals of the existing temporary differences and the recent year tax history. All
the evidence available, both positive and negative, is duly weighted and considered in the analysis.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The reconciliation of the income tax expense in the statements of income and the one that would result from the application of the prevailing income tax rate of the 35% to the income before taxes and the
non-controlling interest is as follow:



|                                                |  |      |       |   |      |  |       |      |  |  |      |  
|----------------------------------------------- |  | ---- | ----- | - | ---- |  | ----- | ---- |  |  | ---- | -
|                                                |  | 2013 |       |   | 2012 |  |       | 2011 | 
|                                                |  |      |      
|Income before income tax                        |  |      | 1,404 |   |      |  | 1,165 |      |  |  | (14  | )
|Blended income tax rate                         |  |      | 35    | % |      |  | 35    | %    |  |  | 35   | %
|                                                |  |      |       |   |      |  |       |      |  |  |      |  
|Income for the period at statutory tax rate     |  |      | (491  | ) |      |  | (408  | )    |  |  | 5    |  
|Permanent differences at income tax rate        |  |      |       |   |      |  |       |      |  |  |      |  
|- Share of profit of equity accounted investees |  |      | 8     |   |      |  | 16    |      |  |  | 20   |  
|- Sales of foreing equity interest              |  |      | 121   |   |      |  |      |      |  |  |     |  
|- Permanent differences in foreign subsidiaries |  |      | 6     |   |      |  | (1    | )    |  |  | (13  | )
|- Cash dividends and other investments items    |  |      | 20    |   |      |  | 1     |      |  |  | 11   |  
|- Other                                         |  |      | (86   | ) |      |  | (96   | )    |  |  | (105 | )
|                                                |  |      |       |   |      |  |       |      |  |  |      |  
|Subtotal                                        |  |      | (422  | ) |      |  | (488  | )    |  |  | (82  | )
|- Foreign income tax                            |  |      |      |   |      |  |      |      |  |  | 32   |  
|- Net movement in the valuation allowance       |  |      | (130  | ) |      |  | (4    | )    |  |  | 35   |  
|                                                |  |      |       |   |      |  |       |      |  |  |      |  
|                                                |  |      | (552  | ) |      |  | (492  | )    |  |  | (15  | )
|                                                |  |      |       |   |      |  |       |      |  |  |      |  



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Carryforward tax losses may be used through the dates indicated below:



|                                      |  |      |     |  |      |  |     |      |  |  |    | 
|------------------------------------- |  | ---- | --- |  | ---- |  | --- | ---- |  |  | -- | 
|Use up to                             |  | 2013 |     |  | 2012 |  |     | 2011 | 
|2015                                  |  |      | 2   |  |      |  | 2   |      |  |  | 11 | 
|2016 onwards                          |  |      | 118 |  |      |  |    |      |  |  |   | 
|                                      |  |      |     |  |      |  |     |      |  |  |    | 
|                                      |  |      | 120 |  |      |  | 2   |      |  |  | 11 | 
|                                      |  |      |     |  |      |  |     |      |  |  |    | 
|                                      |  |      |     |  |      |  |     |      |  |  |    | 
|Income tax assets and liabilities     |  | 2013 |     |  | 2012 |  |     |      | 
|Included in current other receivables |  |      | 226 |  |      |  | 24  |      | 
|Included in taxes payable             |  |      | 86  |  |      |  | 136 |      | 



|24. | Social benefits and other payroll benefits
|--- | ------------------------------------------



|                              |  |       |      |  |         |  |   |             |  |  |            |  |  |             |   |  |         |  |     |             |  |  |   |  |  |  |     | 
|----------------------------- |  | ----- | ---- |  | ------- |  | - | ----------- |  |  | ---------- |  |  | ----------- | - |  | ------- |  | --- | ----------- |  |  | - |  |  |  | --- | 
|                              |  |       |      |  | 2013    |  |   | 2012        |  |  | 01.01.2012 | 
|                              |  | Notes |      |  | Current |  |   | Non Current |  |  | Current    |  |  | Non Current |   |  | Current |  |     | Non Current | 
|Defined contribution plan (1) |  |       | 24.1 |  |         |  | 4 |             |  |  |           |  |  |             | 4 |  |         |  |    |             |  |  | 3 |  |  |  |    | 
|Defined benefit plan          |  |       | 24.2 |  |         |  |  |             |  |  | 235        |  |  |             |  |  |         |  | 210 |             |  |  |  |  |  |  | 154 | 
|Other employment benefits     |  |       | 24.3 |  |         |  |  |             |  |  | 101        |  |  |             |  |  |         |  | 59  |             |  |  |  |  |  |  | 41  | 
|                              |  |       |      |  |         |  |   |             |  |  |            |  |  |             |   |  |         |  |     |             |  |  |   |  |  |  |     | 
|                              |  |       |      |  |         |  | 4 |             |  |  | 336        |  |  |             | 4 |  |         |  | 269 |             |  |  | 3 |  |  |  | 195 | 
|                              |  |       |      |  |         |  |   |             |  |  |            |  |  |             |   |  |         |  |     |             |  |  |   |  |  |  |     | 



|(1) | Included en Current Provisions.
|--- | -------------------------------

24.1. Defined contribution plan

Supplementary Pension Plan

In November 2005, Petrobras Argentinas Board of Directors approved the implementation of a defined voluntary
contribution plan for the employees who fulfill certain conditions. Through this plan, Petrobras Argentina makes contributions to a trust fund in an equal amount to the contributions made by the employees adhered to the plan, in conformity with a
scheme defined for each salary level. The participating employees may make voluntary contributions exceeding those established in the mentioned scheme, which will not be considered for purposes of the contributions to be made by Petrobras Argentina.

In the years ended December 31, 2013, 2012 and 2011, Petrobras Argentina expensed of 17, 15 and 12,
respectively, attributable to such benefit.



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24.2. Defined benefit plan

Indemnity plan

This is a defined benefit plan for
employees who fulfill certain conditions, and consists of granting, upon retirement, a one-month salary per year of service at the Company, with a minimum of six salaries, in conformity with a decreasing scale considering the years that the plan is
in effect.

Compensatory fund

This is a defined benefit plan for employees of Petrobras Argentina who take part in the defined contribution plan effective at the time that joined the Company prior to May 31, 1995, and have
reached a certain number of years of service. The benefit is based on the last computable salary and years of service of each employee included in the plan.

The plan is of a supplemental nature, so that the benefit received by the employee is represented by the amount determined under the provisions of this plan, after deducting benefits payable to the
employee under the Supplementary Pension Plan and the public retirement system, in order to that the aggregate benefit to each employee equals the one stipulated in this plan.

The plan calls for a contribution to a fund exclusively by Petrobras Argentina and without any contribution by the
employees. The assets of the fund are contributed to a trust fund and invested in US dollar-denominated money market instruments in order to preserve the accumulated capital and obtain a return in line with a moderate risk profile. In addition,
although there is no target asset allocation for the following years, funds are mainly invested in US government bonds, commercial papers rated A1 or P1, AAAm-rated mutual funds and time deposits in banks rated A+ or higher in the United States of
America, in accordance with the Trust Agreement dated on March 27, 2002 entered with The Bank of New York Mellon, duly amended by the Permitted Investment Letter dated on September 14th, 2006. The Bank of New York Mellon is the trustee and
Towers Watson is the managing agent. Should there be an excess (duly certified by an independent actuary) of the funds to be used to settle the benefits granted by the plan, Petrobras Argentina will be entitled to choice to use it, in which case it
would have to notify the trustee thereof.

The expected return on the plan assets is calculated on the basis
of the average return of comparable short-term investments, plus some adjustments if future return expectations need to be reflected.



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During 2013, 2012 and 2011 the most relevant actuarial information on the defined-benefits
pension plans are as follows:



|                                               |  |                         |     |   |                     |  |     |                         |  |  |                     |   |  |                         |     |   |                     |  |     |   |  |  |     |  
|---------------------------------------------- |  | ----------------------- | --- | - | ------------------- |  | --- | ----------------------- |  |  | ------------------- | - |  | ----------------------- | --- | - | ------------------- |  | --- | - |  |  | --- | -
|                                               |  | 2013                    |     |   | 2012                |  |     | 2011                    | 
|                                               |  | Fair value ofobligation |     |   | Fair value ofassets |  |     | Fair value ofobligation |  |  | Fair value ofassets |   |  | Fair value ofobligation |     |   | Fair value ofassets | 
|                                               |  |                         |     |   |                     | 
|At the beginning of the year                   |  |                         | 259 |   |                     |  | 49  |                         |  |  | 181                 |   |  |                         | 27  |   |                     |  | 180 |   |  |  | 33  |  
|                                               |  |                         |     |   |                     | 
|Acquisition of PELSA                           |  |                         |    |   |                     |  |    |                         |  |  | 35                  |   |  |                         | 23  |   |                     |  |    |   |  |  |    |  
|                                               |  |                         |     |   |                     | 
|Items classified in profit or loss             |  |                         |     |   |                     |  |     |                         |  |  |                     |   |  |                         |     |   |                     |  |     |   |  |  |     |  
|Service cost                                   |  |                         | 7   |   |                     |  |    |                         |  |  | 5                   |   |  |                         |    |   |                     |  | 3   |   |  |  |    |  
|Net Interest cost                              |  |                         | 78  |   |                     |  | 15  |                         |  |  | 45                  |   |  |                         | 8   |   |                     |  | 32  |   |  |  | 4   |  
|Plan Amendment                                 |  |                         | 6   |   |                     |  |    |                         |  |  |                    |   |  |                         |    |   |                     |  |    |   |  |  |    |  
|                                               |  |                         |     |   |                     | 
|Benefits paid                                  |  |                         | (14 | ) |                     |  | (11 | )                       |  |  | (7                  | ) |  |                         | (7  | ) |                     |  | (8  | ) |  |  | (8  | )
|Contributions paid                             |  |                         |    |   |                     |  | 10  |                         |  |  |                    |   |  |                         | 2   |   |                     |  |    |   |  |  |    |  
|                                               |  |                         |     |   |                     | 
|Items classified in other comprehensive income |  |                         |     |   |                     |  |     |                         |  |  |                     |   |  |                         |     |   |                     |  |     |   |  |  |     |  
|Actuarial gains from experiencie adjustments   |  |                         | (38 | ) |                     |  |    |                         |  |  |                    |   |  |                         | (4  | ) |                     |  | (26 | ) |  |  | (2  | )
|                                               |  |                         |     |   |                     |  |     |                         |  |  |                     |   |  |                         |     |   |                     |  |     |   |  |  |     |  
|At the end of the year (1)                     |  |                         | 298 |   |                     |  | 63  |                         |  |  | 259                 |   |  |                         | 49  |   |                     |  | 181 |   |  |  | 27  |  
|                                               |  |                         |     |   |                     |  |     |                         |  |  |                     |   |  |                         |     |   |                     |  |     |   |  |  |     |  
|Unfunded status at the end of the year         |  |                         |     |   |                     |  | 235 |                         |  |  |                     |   |  |                         | 210 |   |                     |  |     |   |  |  | 154 |  
|                                               |  |                         |     |   |                     |  |     |                         |  |  |                     |   |  |                         |     |   |                     |  |     |   |  |  |     |  



|(1) | As of December 31, 2013, 2012 and January 1, 2012, the benefit obligation includes 172, 165 and 136 of Compensatory Fund and 63, 51 and 45 of
Indemnity Plan, respectively.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Principal assumptions and sensitivity analysis



|                        |  |      |   |   |                                      |  |   |          |  |  |          |    |  |  |       |   
|----------------------- |  | ---- | - | - | ------------------------------------ |  | - | -------- |  |  | -------- | -- |  |  | ----- | --
|                        |  |      |   |   | Impact on defined benefit obligation | 
|                        |  | Used |   |   | Change                               |  |   | Increase |  |  | Decrease |   
|Discount rate           |  |      | 4 | % |                                      |  | 1 | %        |  |  | (10.53   | %) |  |  | 12.77 | % 
|Future salary increases |  |      | 2 | % |                                      |  | 1 | %        |  |  | 7        | %  |  |  | (5.30 | %)

The sensitivity analyses is based on a change in an assumption while holding all other
assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. Therefore, the presented analysis may not be representative of the actual change in the defined benefit obligation.



|                                                       |  |  |     | 
|------------------------------------------------------ |  |  | --- | 
|Benefit obligation are expected to be paid as follows: | 
|2015                                                   |  |  | 16  | 
|2016                                                   |  |  | 18  | 
|2017                                                   |  |  | 18  | 
|2018                                                   |  |  | 20  | 
|2019-2023                                              |  |  | 117 | 

24.3. Other employment benefit obligations

Company employees falling within the scope of certain collective bargaining agreements and meeting the relevant
requirements are eligible to receive a certain number of salary pays, when they leave the Company upon retirement or disability.



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During 2013, 2012 and 2011 the most relevant actuarial information on the defined-benefits as
follows:



|                                                |  |      |     |   |      |  |    |      |  |  |    | 
|----------------------------------------------- |  | ---- | --- | - | ---- |  | -- | ---- |  |  | -- | 
|                                                |  | 2013 |     |   | 2012 |  |    | 2011 | 
|Benefit obligation at the beginning of the year |  |      | 59  |   |      |  | 41 |      |  |  | 22 | 
|                                                |  |      |    
|Items classified in profit or loss              |  |      |     |   |      |  |    |      |  |  |    | 
|Service cost                                    |  |      | 5   |   |      |  | 3  |      |  |  | 2  | 
|Net Interest cost                               |  |      | 17  |   |      |  | 10 |      |  |  | 9  | 
|Benefits paid                                   |  |      | (2  | ) |      |  | (6 | )    |  |  |   | 
|                                                |  |      |    
|Items classified en other comprehensive income  |  |      |     |   |      |  |    |      |  |  |    | 
|Actuarial gains from experiencie adjustments    |  |      | 22  |   |      |  | 11 |      |  |  | 8  | 
|                                                |  |      |     |   |      |  |    |      |  |  |    | 
|Benefit obligation at the end of the year       |  |      | 101 |   |      |  | 59 |      |  |  | 41 | 
|                                                |  |      |     |   |      |  |    |      |  |  |    | 

Principal assumptions and sensitivity analysis



|                        |  |      |   |   |                                      |  |   |          |  |  |          |    |  |  |        |   
|----------------------- |  | ---- | - | - | ------------------------------------ |  | - | -------- |  |  | -------- | -- |  |  | ------ | --
|                        |  |      |   |   | Impact on defined benefit obligation | 
|                        |  | Used |   |   | Change                               |  |   | Increase |  |  | Decrease |   
|Discount rate           |  |      | 4 | % |                                      |  | 1 | %        |  |  | (10.89   | %) |  |  | 12.97  | % 
|                        |  |      |   |  
|Future salary increases |  |      | 2 | % |                                      |  | 1 | %        |  |  | 13.34    | %  |  |  | (11.17 | %)

The sensitivity analyses is based on a change in an assumption while holding all other
assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. Therefore, the presented analysis may not be representative of the actual change in the defined benefit obligation.



|                                                       |  |  |    | 
|------------------------------------------------------ |  |  | -- | 
|Benefit obligation are expected to be paid as follows: | 
|2015                                                   |  |  | 3  | 
|2016                                                   |  |  | 5  | 
|2017                                                   |  |  | 6  | 
|2018                                                   |  |  | 3  | 
|2019-2023                                              |  |  | 35 | 

24.4. Pension plan financing  Optimum Petrobras Trust Fund

The Company, in its capacity as trustor, entered into a trust agreement with BNP Paribas Argentina Investment Partners
S.A., in its capacity as trustee, which trust assets consist of shares of the Company (Note 2.6.5). As of December 31, 2013 the trust assets consist of 5,808,428 shares of the Company.

The sole purpose of the trust is to make periodical contributions of shares and/or cash resulting from the sale of the
shares in order for the Company to comply with the funding obligations under the Compensatory Fund (Note 24.2) and the Supplementary Pension Plan (Note 24.1).



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|25. | Provisions
|--- | ----------



|                                     |  |       |  |         |     |  |             |  |       |            |  |  |             |  |  |         |       |  |             |  |     |  |  |  |       | 
|------------------------------------ |  | ----- |  | ------- | --- |  | ----------- |  | ----- | ---------- |  |  | ----------- |  |  | ------- | ----- |  | ----------- |  | --- |  |  |  | ----- | 
|                                     |  |       |  | 2013    |     |  | 2012        |  |       | 01.01.2012 | 
|                                     |  | Notes |  | Current |     |  | Non current |  |       | Current    |  |  | Non current |  |  | Current |       |  | Non current | 
|                                     |  |       |  |         |     |  |            
|Related companies                    |  | 26.2  |  |         | 115 |  |             |  | 288   |            |  |  | 137         |  |  |         | 283   |  |             |  | 114 |  |  |  | 273   | 
|Reserve for enviromental remadiation |  | (1)   |  |         | 112 |  |             |  | 43    |            |  |  | 259         |  |  |         | 44    |  |             |  | 124 |  |  |  | 200   | 
|Joint ventures                       |  |       |  |         | 43  |  |             |  |      |            |  |  |            |  |  |         | 5     |  |             |  | 161 |  |  |  | 50    | 
|Asset retirement obligation          |  | 27.2  |  |         | 12  |  |             |  | 1,401 |            |  |  | 77          |  |  |         | 939   |  |             |  |    |  |  |  | 702   | 
|Contingences                         |  | (2)   |  |         | 1   |  |             |  | 318   |            |  |  | 1           |  |  |         | 259   |  |             |  | 10  |  |  |  | 253   | 
|Other liabilities                    |  | (3)   |  |         | 102 |  |             |  | 174   |            |  |  | 169         |  |  |         | 51    |  |             |  | 107 |  |  |  | 75    | 
|                                     |  |       |  |         |     |  |             |  |       |            |  |  |             |  |  |         |       |  |             |  |     |  |  |  |       | 
|                                     |  |       |  |         | 385 |  |             |  | 2,224 |            |  |  | 643         |  |  |         | 1,581 |  |             |  | 516 |  |  |  | 1,553 | 
|                                     |  |       |  |         |     |  |             |  |       |            |  |  |             |  |  |         |       |  |             |  |     |  |  |  |       | 



|(1) | Activity in 2013, 2012 and 2011 fiscal years includes (148), (21) and (37) attributable to payments net of new charges. Fiscal year 2013
and 2011 includes 27 y 260 shown under Other operating income (expense) (Note 9).
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Activity in 2013, 2012 and 2011 fiscal years includes 103, 30 and 112 shown under Other operating income (expense) (Note 9) and (44), (33) and
(11) attributable to disbursements for the year. Fiscal year 2011 includes 28 shown under Financial results.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | The balance of liabilities for employee benefits that was included in Miscellaneous on December 31, 2012 and January 1, 2012 for 23 and 14
was reclassified to the Employee Benefits as described in Note 2.2.1.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Environmental matters

The Company is subject to extensive environmental regulations in Argentina and in the other countries in which it
operates. Petrobras Argentinas management believes that its current operations are in material compliance with applicable environmental requirements, as currently interpreted and enforced, including regulatory remediation commitments assumed.
The Company has not incurred in any material environmental liabilities as a result of its operations to date. Petrobras Argentina undertakes environmental impact studies for new projects and investments and, to date, environmental requirements and
restrictions imposed on these new projects have not had any material adverse impact on Petrobras Argentinas business.

Other issues

The Company maintains interpretative differences with the AFIP, provincial tax authorities and foreign tax
authorities about taxes applicable oil and gas activity. The Companys Management and its legal advisors estimate that the outcome of these differences will not have significant adverse effects on the Companys financial position or
results of operations.



|26. | Related party transactions
|--- | --------------------------

26.1. General conditions

Related-party
transactions are conducted in the ordinary course of business at arms length conditions and at market prices. The terms and conditions of these transactions are comparable to those offered by or obtained from non-related parties.

Acquisition of companies

In May 2012, the Company reached an agreement to acquire a 39.671% equity interest in PELSA from its controlling company Petrobras Participaciones S.L. (See Note 13.5).

Sale of companies

In December 2007 and in April 2009, Petrobras Argentina sold to PIB BV (a subsidiary of its holding company) a 40% equity interest and the remaining 60% equity interest in PVIE for US$423.3 million and
US$619.4 million, respectively.



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The agreed price further includes a contingent consideration in favor of the Company to reflect
the value of the Prospectus Kinteroni in market conditions or, alternatively, non-participation of the buyer and their respective compensation. Such compensation defined by the parties is a consequence of the discovery of gas and
condensate in the prospectus Kinteroni of Block 57 in January 2008. The Company continues to negotiate with the buyer in order to agree on the amount.

In March 2011, the Company, through its subsidiary Petrobras Energía Internacional S.A., sold its equity interest in Innova S.A. (Note 18.2) to Petróleo Brasileiro S.A. for US$ 332 million.

Financial transactions

In 2005, the Company entered into a US$ 200 million loan agreement with PIB BV (lender). The loan has a 10-year term and bears interest at a rate of 7.22% per annum, plus taxes and can be paid
off at any time without penalty. This loan was prepaid in April 2011.

In February 2008, the Company approved
the placement of short-term financial surplus in PIB BV, up to the amount of US$300 million, at a monthly payable nominal annual interest rate equivalent to 30-day Libor plus 0.15%, due July 2008, with a prepayment clause available to the Company.
In December 2008, the outstanding loan balance was replaced by means of two new loans totaling US$120 million: a US$107 million loan to PIB BV from Petrobras Argentina and a US$13 million loan to PIB BV from Petrobras Holding Austria GMBH, a
subsidiary of Petrobras Argentina, both becoming due in December 2009, with a prepayment clause available to the Company. As regards these two loans, US$30 million were paid before maturity and US$90 million were paid at maturity

Financial guarantees

In 2007, Petrobras Argentina issued US$300 million Class S corporate bonds, collateralized by a Standby Purchase Agreement provided by Petróleo Brasileiro (Note 22).

In December 2009, the Company took two loans in the aggregate amount of US$150 million, guaranteed by Petróleo
Brasileiro: one loan granted by Banco Itaú Europa, in the amount of US$100 million, collateralized be repaid in 7 semiannual installments with final payment date in December 2013, and another loan granted by HSBC Bank USA in the amount of
US$50 million, due June 2012. These loans were paid off early during 2011.

Commercial transactions

The Company carries out in the ordinary course of business, the Company makes purchase and sale of crude oil and oil
related products with PELSA, Refinor and EG3 Red, and operations of transportation of oil and gas with Oldelval and TGS. In addition, the Company makes crude oil and oil related products import and export transactions with subsidiaries of
Petróleo Brasileiro, particularly with Brasken S.A. and Petrobras Global Trading BV.



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PETROBRAS ARGENTINA S.A.



26.2. Balances and transactions with related companies

Outstanding balances with related parties as of December 31, 2013, 2012 and January 1, 2012 are as follows:



|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|------------------------------------------------ |  | ----- |  | ---------------- | -- |  | ---------------- |  | --- | --------------- |  |  | ---------- |  |  | ---------------- | --- |  | ---------- |  | --- |  |  |  | --- | 
|                                                 |  |       |  | 2013             |   
|                                                 |  |       |  | Current          |    |  | Non-current      | 
|Company                                          |  | Notes |  | TradeReceivables |    |  | OtherReceivables |  |     | AccountsPayable |  |  | Provisions |  |  | OtherInvestments |     |  | Provisions | 
|Associates                                       |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Oleoducto de Crudos Pesados Ltd. (Note 5.4)      |  |       |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 92  |  |            |  | 127 |  |  |  | 288 | 
|Refinería del Norte S.A.                         |  |       |  |                  | 4  |  |                  |  | 13  |                 |  |  | 7          |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Other                                            |  |       |  |                  | 6  |  |                  |  | 109 |                 |  |  | 6          |  |  |                  | 7   |  |            |  | 1   |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|                                                 |  |       |  |                  | 10 |  |                  |  | 122 |                 |  |  | 13         |  |  |                  | 99  |  |            |  | 128 |  |  |  | 288 | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Entities under joint control                     |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|TGS                                              |  |       |  |                  | 21 |  |                  |  | 8   |                 |  |  | 12         |  |  |                  |    |  |            |  |    |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|                                                 |  |       |  |                  | 21 |  |                  |  | 8   |                 |  |  | 12         |  |  |                  |    |  |            |  |    |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Petróleo Brasileiro Group companies              |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Braskem S.A.                                     |  |       |  |                  |   |  |                  |  |    |                 |  |  | 60         |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petrobras Chile Ltda.                            |  |       |  |                  |   |  |                  |  | 5   |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|PIB BV                                           |  |       |  |                  |   |  |                  |  | 237 |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petrobras Venezuela Inversiones y Servicios S.A. |  |       |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 16  |  |            |  |    |  |  |  |    | 
|Innova S.A.                                      |  | 18.2  |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petrobras Global Trading B.V.                    |  |       |  |                  | 1  |  |                  |  |    |                 |  |  | 1          |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petróleo Brasileiro                              |  |       |  |                  | 1  |  |                  |  | 3   |                 |  |  | 144        |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Petróleo Colombia Combustibles S.A.              |  |       |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |    |  |  |  |    | 
|Other                                            |  |       |  |                  | 10 |  |                  |  | 34  |                 |  |  | 9          |  |  |                  |    |  |            |  |    |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|                                                 |  |       |  |                  | 12 |  |                  |  | 279 |                 |  |  | 214        |  |  |                  | 16  |  |            |  |    |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 
|Total                                            |  |       |  |                  | 43 |  |                  |  | 409 |                 |  |  | 239        |  |  |                  | 115 |  |            |  | 128 |  |  |  | 288 | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |     |  |  |  |     | 



|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|------------------------------------------------ |  | ----- |  | ---------------- | -- |  | ---------------- |  | --- | --------------- |  |  | ---------- |  |  | ---------------- | --- |  | ---------- |  | -- |  |  |  | --- | 
|                                                 |  |       |  | 2012             |   
|                                                 |  |       |  | Current          |    |  | Non-current      | 
|Company                                          |  | Notes |  | TradeReceivables |    |  | OtherReceivables |  |     | AccountsPayable |  |  | Provisions |  |  | OtherInvestments |     |  | Provisions | 
|Associates                                       |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Oleoducto de Crudos Pesados Ltd. (Note 5.4)      |  |       |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 97  |  |            |  | 97 |  |  |  | 283 | 
|Refinería del Norte S.A.                         |  |       |  |                  | 9  |  |                  |  | 14  |                 |  |  | 22         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Other                                            |  |       |  |                  | 1  |  |                  |  | 8   |                 |  |  | 10         |  |  |                  | 9   |  |            |  | 1  |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|                                                 |  |       |  |                  | 10 |  |                  |  | 22  |                 |  |  | 32         |  |  |                  | 106 |  |            |  | 98 |  |  |  | 283 | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Entities under joint control                     |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|TGS                                              |  |       |  |                  | 49 |  |                  |  | 6   |                 |  |  | 39         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|                                                 |  |       |  |                  | 49 |  |                  |  | 6   |                 |  |  | 39         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Petróleo Brasileiro Group companies              |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Braskem S.A.                                     |  |       |  |                  |   |  |                  |  |    |                 |  |  | 16         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petrobras Chile Ltda.                            |  |       |  |                  |   |  |                  |  | 4   |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|PIB BV                                           |  |       |  |                  |   |  |                  |  | 152 |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petrobras Venezuela Inversiones y Servicios S.A. |  |       |  |                  |   |  |                  |  |    |                 |  |  |           |  |  |                  | 31  |  |            |  |   |  |  |  |    | 
|Innova S.A.                                      |  | 18.2  |  |                  | 6  |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petrobras Global Trading B.V.                    |  |       |  |                  | 27 |  |                  |  |    |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petróleo Brasileiro                              |  |       |  |                  |   |  |                  |  | 425 |                 |  |  | 85         |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Petróleo Colombia Combustibles S.A.              |  |       |  |                  |   |  |                  |  | 11  |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|Other                                            |  |       |  |                  |   |  |                  |  | 43  |                 |  |  |           |  |  |                  |    |  |            |  |   |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|                                                 |  |       |  |                  | 33 |  |                  |  | 635 |                 |  |  | 101        |  |  |                  | 31  |  |            |  |   |  |  |  |    | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 
|Total                                            |  |       |  |                  | 92 |  |                  |  | 663 |                 |  |  | 172        |  |  |                  | 137 |  |            |  | 98 |  |  |  | 283 | 
|                                                 |  |       |  |                  |    |  |                  |  |     |                 |  |  |            |  |  |                  |     |  |            |  |    |  |  |  |     | 



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PETROBRAS ARGENTINA S.A.





|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|------------------------------------------------ |  | ----- | ---- |  | ----------------------- |  | --- | ---------------- |  |  | ---------------- |  |  | --------------- | --- |  | ---------- |  | --- | ---------------- |  |  | ---------------- |  |  | --------------- | --- |  | ---------- |  | --- |  |  |  | -- |  |  |  | --- | 
|                                                 |  |       |      |  | 01.01.2012              | 
|                                                 |  |       |      |  | Current                 |  |     | Non-current      | 
|Company                                          |  | Notes |      |  | Cash andcashequivalents |  |     | TradeReceivables |  |  | OtherReceivables |  |  | AccountsPayable |     |  | Provisions |  |     | OtherInvestments |  |  | OtherReceivables |  |  | AccountsPayable |     |  | Provisions | 
|Associates                                       |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|Oleoducto de Crudos Pesados Ltd.                 |  |       |      |  |                         |  |    |                  |  |  |                 |  |  |                 |    |  |            |  |    |                  |  |  | 83               |  |  |                 | 141 |  |            |  |    |  |  |  |   |  |  |  | 273 | 
|PELSA                                            |  |       |      |  |                         |  |    |                  |  |  |                 |  |  |                 |    |  |            |  | 19  |                  |  |  |                 |  |  |                 |    |  |            |  |    |  |  |  | 38 |  |  |  |    | 
|Refinería del Norte S.A.                         |  |       |      |  |                         |  |    |                  |  |  | 2                |  |  |                 | 17  |  |            |  | 18  |                  |  |  |                 |  |  |                 |    |  |            |  |    |  |  |  |   |  |  |  |    | 
|Other                                            |  |       |      |  |                         |  |    |                  |  |  | 12               |  |  |                 | 29  |  |            |  | 2   |                  |  |  | 5                |  |  |                 | 7   |  |            |  |    |  |  |  |   |  |  |  |    | 
|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|                                                 |  |       |      |  |                         |  |    |                  |  |  | 14               |  |  |                 | 46  |  |            |  | 39  |                  |  |  | 88               |  |  |                 | 148 |  |            |  |     |  |  |  | 38 |  |  |  | 273 | 
|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|Entities under joint control                     |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|TGS                                              |  |       |      |  |                         |  |    |                  |  |  | 45               |  |  |                 |    |  |            |  | 30  |                  |  |  |                 |  |  |                 |    |  |            |  |    |  |  |  |   |  |  |  |    | 
|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|                                                 |  |       |      |  |                         |  |    |                  |  |  | 45               |  |  |                 |    |  |            |  | 30  |                  |  |  |                 |  |  |                 |    |  |            |  |     |  |  |  |   |  |  |  |    | 
|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|Petróleo Brasileiro Group companies              |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|Braskem S.A.                                     |  |       |      |  |                         |  |    |                  |  |  |                 |  |  |                 |    |  |            |  | 61  |                  |  |  |                 |  |  |                 |    |  |            |  |    |  |  |  |   |  |  |  |    | 
|Petrobras Chile Ltda.                            |  |       |      |  |                         |  |    |                  |  |  |                 |  |  |                 | 2   |  |            |  |    |                  |  |  |                 |  |  |                 |    |  |            |  |    |  |  |  |   |  |  |  |    | 
|PIB BV                                           |  |       |      |  |                         |  | 387 |                  |  |  |                 |  |  |                 | 133 |  |            |  |    |                  |  |  |                 |  |  |                 |    |  |            |  |    |  |  |  |   |  |  |  |    | 
|Petrobras International Finance Co.              |  |       |      |  |                         |  |    |                  |  |  | 2                |  |  |                 |    |  |            |  |    |                  |  |  |                 |  |  |                 |    |  |            |  |    |  |  |  |   |  |  |  |    | 
|Petrobras Venezuela Inversiones y Servicios S.A. |  |       |      |  |                         |  |    |                  |  |  |                 |  |  |                 |    |  |            |  |    |                  |  |  | 23               |  |  |                 |    |  |            |  |     |  |  |  |   |  |  |  |    | 
|Innova S.A.                                      |  |       | 18.2 |  |                         |  |    |                  |  |  | 20               |  |  |                 |    |  |            |  |    |                  |  |  | 3                |  |  |                 |    |  |            |  |     |  |  |  |   |  |  |  |    | 
|Petróleo Brasileiro                              |  |       |      |  |                         |  |    |                  |  |  | 1                |  |  |                 | 35  |  |            |  | 91  |                  |  |  |                 |  |  |                 |    |  |            |  | 450 |  |  |  |   |  |  |  |    | 
|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|                                                 |  |       |      |  |                         |  | 387 |                  |  |  | 23               |  |  |                 | 170 |  |            |  | 152 |                  |  |  | 26               |  |  |                 |    |  |            |  | 450 |  |  |  |   |  |  |  |    | 
|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 
|Total                                            |  |       |      |  |                         |  | 387 |                  |  |  | 82               |  |  |                 | 216 |  |            |  | 221 |                  |  |  | 114              |  |  |                 | 148 |  |            |  | 450 |  |  |  | 38 |  |  |  | 273 | 
|                                                 |  |       |      |  |                         |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |                  |  |  |                  |  |  |                 |     |  |            |  |     |  |  |  |    |  |  |  |     | 

The main transactions with related companies for the years ended December 31, 2013,
2012 and 2011 are as follows:



|                                                  |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|------------------------------------------------- |  | ----- | ---- |  | --------- |  | --- | ----- |  |  | --------- |  |  | ----- | ----- |  | --------- |  | --- | ----- |  |  | ----- |  |  |  | --- | 
|                                                  |  |       |      |  | 2013      |  |     | 2012  |  |  | 2011      | 
|Company                                           |  | Notes |      |  | Purchases |  |     | Sales |  |  | Purchases |  |  | Sales |       |  | Purchases |  |     | Sales | 
|Associates                                        |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|Oleoductos del Valle S.A.                         |  |       |      |  |           |  | 46  |       |  |  | 3         |  |  |       | 37    |  |           |  | 3   |       |  |  | 31    |  |  |  | 3   | 
|PELSA                                             |  |       |      |  |           |  |    |       |  |  |          |  |  |       | 5     |  |           |  | 2   |       |  |  | 148   |  |  |  | 4   | 
|Refinería del Norte S.A.                          |  |       |      |  |           |  | 86  |       |  |  | 42        |  |  |       | 124   |  |           |  | 35  |       |  |  | 108   |  |  |  | 43  | 
|                                                  |  |       |      |  |           |  | 132 |       |  |  | 45        |  |  |       | 166   |  |           |  | 40  |       |  |  | 287   |  |  |  | 50  | 
|                                                  |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|Entities under joint control                      |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|TGS                                               |  |       |      |  |           |  | 68  |       |  |  | 202       |  |  |       | 82    |  |           |  | 91  |       |  |  | 109   |  |  |  | 50  | 
|                                                  |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|                                                  |  |       |      |  |           |  | 68  |       |  |  | 202       |  |  |       | 82    |  |           |  | 91  |       |  |  | 109   |  |  |  | 50  | 
|                                                  |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|Petróleo Brasileiro Group companies               |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|Braskem S.A.                                      |  |       |      |  |           |  | 471 |       |  |  |          |  |  |       | 646   |  |           |  |    |       |  |  | 1,114 |  |  |  |    | 
|Petrobras International Finance Co.               |  |       |      |  |           |  |    |       |  |  |          |  |  |       |      |  |           |  |    |       |  |  | 128   |  |  |  | 5   | 
|Petróleo Brasileiro                               |  |       |      |  |           |  | 122 |       |  |  | 17        |  |  |       | 66    |  |           |  | 28  |       |  |  | 150   |  |  |  | 157 | 
|Compañía Mega S.A.                                |  |       |      |  |           |  |    |       |  |  | 7         |  |  |       |      |  |           |  | 7   |       |  |  |      |  |  |  | 36  | 
|PIB BV                                            |  |       |      |  |           |  |    |       |  |  |          |  |  |       | 80    |  |           |  |    |       |  |  |      |  |  |  |    | 
|Petrobras Paraguay Operaciones y Logistica S.R.L. |  |       |      |  |           |  |    |       |  |  | 47        |  |  |       |      |  |           |  | 46  |       |  |  |      |  |  |  | 28  | 
|Petrobras Global Trading BV                       |  |       |      |  |           |  | 41  |       |  |  |          |  |  |       | 192   |  |           |  | 27  |       |  |  |      |  |  |  |    | 
|Innova S.A.                                       |  |       | 18.2 |  |           |  |    |       |  |  | 173       |  |  |       | 1     |  |           |  | 151 |       |  |  | 8     |  |  |  | 133 | 
|Petrobras Chile Distribución Limitada             |  |       |      |  |           |  |    |       |  |  | 27        |  |  |       |      |  |           |  |    |       |  |  |      |  |  |  |    | 
|Other                                             |  |       |      |  |           |  | 3   |       |  |  |          |  |  |       | 3     |  |           |  | 10  |       |  |  |      |  |  |  | 19  | 
|                                                  |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|                                                  |  |       |      |  |           |  | 637 |       |  |  | 271       |  |  |       | 988   |  |           |  | 269 |       |  |  | 1,400 |  |  |  | 378 | 
|                                                  |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 
|Total                                             |  |       |      |  |           |  | 837 |       |  |  | 518       |  |  |       | 1,236 |  |           |  | 400 |       |  |  | 1,796 |  |  |  | 478 | 
|                                                  |  |       |      |  |           |  |     |       |  |  |           |  |  |       |       |  |           |  |     |       |  |  |       |  |  |  |     | 

During 2013, 2012 and 2011, the Company paid to its directors and executive officers
salaries for approximately 18, 17 and 15, and no significant payments of other benefits were made. The members of the Board of Directors and executive officers do not receive any share based payments or compensation.



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|27. | Oil and gas areas and participation in joint ventures
|--- | -----------------------------------------------------

27.1. General considerations

The Company is jointly and severally liable with the other participants for meeting the contractual obligations under these arrangements.

The production areas in Argentina are operated pursuant to concession production agreements with free crude oil
availability.

According to Law No.17,319, royalties equivalent to 12% of the wellhead price of crude oil and
natural gas are paid in Argentina. The wellhead price is calculated by deducting freight and other sales related expenses from the sale prices obtained from transactions with third parties.

The Companys branch in Bolivia performs at its own risk and for its own account, in the name and on behalf of YPFB
exploration and production activities within the Colpa Caranda area. Pursuant to the agreement, YPFB owns the hydrocarbons, pays royalties and direct tax on hydrocarbons, which in the aggregate amount to 50% of the production valued on the basis of
sales prices, and applies the 80% of the surplus amount to pay, in the first place, the costs and depreciations associated to the development and operation of Petrobras Argentinas branch, being the rest shared between YPFB and the branch on
the basis of an index calculated based on production volumes, depreciation rate, prices and taxes paid, among other items.

27.2. Asset retirement obligations

In accordance with the regulations applicable in the countries where the Company performs oil and gas exploration and production activities. The Company must incur costs associated with well plugging and
abandonment. The Company and the joint operations have not pledged any assets for the purpose of settling such obligations.

The following table summarizes the activity in asset retirement obligations for the years ended December 31, 2013, 2012 and 2011.



|                                     |  |      |       |   |      |  |       |      |  |  |     |  
|------------------------------------ |  | ---- | ----- | - | ---- |  | ----- | ---- |  |  | --- | -
|                                     |  | 2013 |       |   | 2012 |  |       | 2011 | 
|Beginning balance                    |  |      | 1,016 |   |      |  | 702   |      |  |  | 450 |  
|Acquisition of PELSA                 |  |      |      |   |      |  | 52    |      |  |  |    |  
|Accretion                            |  |      | 46    |   |      |  | 36    |      |  |  | 29  |  
|Additions                            |  |      | 61    |   |      |  | 10    |      |  |  | 29  |  
|Estimated cash flow changes          |  |      | 377   |   |      |  | 209   |      |  |  | 206 |  
|Decreases                            |  |      | (124  | ) |      |  |      |      |  |  |    |  
|Foreign currency translation / other |  |      | 37    |   |      |  | 7     |      |  |  | (12 | )
|                                     |  |      |       |   |      |  |       |      |  |  |     |  
|Ending balance                       |  |      | 1,413 |   |      |  | 1,016 |      |  |  | 702 |  
|                                     |  |      |       |   |      |  |       |      |  |  |     |  

27.3. Exploratory well costs

The following table provides the year end balances and activity for exploratory well costs, during the years ended on
December 31, 2013, 2012 and 2011:



|                            |  |       |   |  |      |  |      |      |  |  |      |   |  |  |      |  
|--------------------------- |  | ----- | - |  | ---- |  | ---- | ---- |  |  | ---- | - |  |  | ---- | -
|                            |  | Notes |   |  | 2013 |  |      | 2012 |  |  | 2011 |  
|Beginning balance           |  |       |   |  |      |  | 116  |      |  |  | 174  |   |  |  | 216  |  
|Traslation effect           |  |       |   |  |      |  | 5    |      |  |  | 21   |   |  |  |     |  
|Acquisition of PELSA        |  |       |   |  |      |  |     |      |  |  | 43   |   |  |  |     |  
|Additions                   |  |       |   |  |      |  | 319  |      |  |  | 65   |   |  |  | 305  |  
|Transferred to development  |  |       |   |  |      |  | (115 | )    |  |  | (19  | ) |  |  | (53  | )
|Charged to expenses         |  |       | 8 |  |      |  | (27  | )    |  |  | (168 | ) |  |  | (294 | )
|                            |  |       |   |  |      |  |      |      |  |  |      |   |  |  |      |  
|Ending balance              |  |       |   |  |      |  | 298  |      |  |  | 116  |   |  |  | 174  |  
|                            |  |       |   |  |      |  |      |      |  |  |      |   |  |  |      |  
|Number of wells at year end |  |       |   |  |      |  | 23   |      |  |  | 17   |   |  |  | 18   |  
|                            |  |       |   |  |      |  |      |      |  |  |      |   |  |  |      |  



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27.4. Oil and gas areas and participation in joint-operations

At December 31, 2013, the Company and associates are part of the joint operations and consortia for the exploration
and production of oil and gas as indicated below:

27.4.1 Companys joint operations



|                                  |  |  |    |   |          |                                  |                  |  |        |          |  |  |          |   |            |                            |  |            
|--------------------------------- |  |  | -- | - | -------- | -------------------------------- | ---------------- |  | ------ | -------- |  |  | -------- | - | ---------- | -------------------------- |  | -----------
|                                  |  |  |    |   |          |                                  | WORKING INTEREST |  |        |          |  | 
|NAME                              |  |  |    |   | LOCATION |                                  | DIRECT           |  |        | INDIRECT |  |  | OPERATOR |   | EXPIRATION
|PRODUCTION                        |  |  |    |   |          |                                  |                  |  |        |          |  |  |          |   |            |                            |  |            
|Argentina                         |  |  |    |   |          |                                  |                  |  |        |          |  |  |          |   |            |                            |  |            
|25 de MayoMedanito S.E.          |  |  |    |   |          | La Pampa and Río Negro           |                  |  | 100.00 | %        |  |  |         |   |            | Petrobras Argentina        |  | 2016       
|Jagüel de los Machos              |  |  |    |   |          | La Pampa and Río Negro           |                  |  | 100.00 | %        |  |  |         |   |            | Petrobras Argentina        |  | 2015       
|Puesto Hernández                  |  |  | (1 | ) |          | Mendoza y Neuquén                |                  |  | 38.45  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2016       
|Bajada del Palo                   |  |  |    |   |          | Neuquén                          |                  |  | 3.85   | %        |  |  | 43.07    | % |            | PELSA                      |  | 2025       
|Santa Cruz II                     |  |  |    |   |          | Santa Cruz                       |                  |  | 100.00 | %        |  |  |         |   |            | Petrobras Argentina        |  | 2017 / 2028
|Río Neuquén                       |  |  |    |   |          | Neuquén and Río Negro            |                  |  | 100.00 | %        |  |  |         |   |            | Petrobras Argentina        |  | 2017 / 2027
|Entre Lomas                       |  |  |    |   |          | Neuquén and Río Negro            |                  |  | 3.85   | %        |  |  | 43.07    | % |            | PELSA                      |  | 2016 / 2026
|Aguada de la Arena                |  |  |    |   |          | Neuquén                          |                  |  | 80.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2036       
|Santa Cruz I                      |  |  |    |   |          | Santa Cruz                       |                  |  | 71.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2017 / 2035
|Sierra Chata                      |  |  |    |   |          | Neuquén                          |                  |  | 19.89  | %        |  |  | 25.67    | % |            | Petrobras Argentina        |  | 2023       
|El Mangrullo                      |  |  |    |   |          | Neuquén                          |                  |  | 100.00 | %        |  |  |         |   |            | Petrobras Argentina        |  | 2025       
|Atuel Norte                       |  |  |    |   |          | Mendoza                          |                  |  | 33.33  | %        |  |  |         |   |            | Tecpetrol                  |  | 2015       
|La TaperaPuesto Quiroga          |  |  |    |   |          | Chubut                           |                  |  | 35.67  | %        |  |  |         |   |            | Tecpetrol                  |  | 2027       
|El Tordillo                       |  |  |    |   |          | Chubut                           |                  |  | 35.67  | %        |  |  |         |   |            | Tecpetrol                  |  | 2027       
|Aguaragüe                         |  |  |    |   |          | Salta                            |                  |  | 15.00  | %        |  |  |         |   |            | Tecpetrol                  |  | 2023 / 2027
|Estancia Agua Fresca              |  |  |    |   |          | Santa Cruz                       |                  |  | 50.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2034       
|Gobernador Ayala                  |  |  |    |   |          | Mendoza                          |                  |  | 22.51  | %        |  |  |         |   |            | Petro Andina Resources Ltd |  | 2036       
|Puesto Oliverio                   |  |  |    |   |          | Santa Cruz                       |                  |  | 50.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2037       
|Charco del Palenque               |  |  |    |   |          | Río Negro                        |                  |  | 3.85   | %        |  |  | 43.07    | % |            | PELSA                      |  | 2038       
|                                  |  |  |    |   |          |                                 
|Foreign                           |  |  |    |   |          |                                  |                  |  |        |          |  |  |          |   |            |                            |  |            
|ColpaCaranda                     |  |  |    |   |          | Bolivia                          |                  |  | 100.00 | %        |  |  |         |   |            | Petrobras Argentina        |  | 2029       
|                                  |  |  |    |   |          |                                 
|EXPLORATION                       |  |  |    |   |          |                                  |                  |  |        |          |  |  |          |   |            |                            |  |            
|Argentina                         |  |  |    |   |          |                                  |                  |  |        |          |  |  |          |   |            |                            |  |            
|Agua Amarga                       |  |  |    |   |          | Río Negro                        |                  |  | 3.85   | %        |  |  | 43.07    | % |            | PELSA                      |  | 2016       
|Glencross                         |  |  |    |   |          | Santa Cruz                       |                  |  | 87.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2033       
|Cerrito Oeste                     |  |  |    |   |          | Santa Cruz                       |                  |  | 50.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2,037.00   
|El Campamento                     |  |  |    |   |          | Santa Cruz                       |                  |  | 50.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2,037.00   
|Cerro Hamaca Norte                |  |  | (3 | ) |          | Mendoza                          |                  |  | 39.64  | %        |  |  |         |   |            | Petro Andina Resources Ltd |  |           
|Parva Negra                       |  |  | (3 | ) |          | Neuquén                          |                  |  | 47.63  | %        |  |  | 52.37    | % |            | Petrobras Argentina        |  |           
|Estancia Chiripá                  |  |  |    |   |          | Santa Cruz                       |                  |  | 87.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2033       
|Enarsa 1 (E1)                     |  |  |    |   |          | Plataforma Continental Argentina |                  |  | 25.00  | %        |  |  |         |   |            | YPF                        |  | 2020       
|Enarsa 3 (E3)                     |  |  |    |   |          | Plataforma Continental Argentina |                  |  | 35.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2020       
|Chirete                           |  |  |    |   |          | Salta                            |                  |  | 100.00 | %        |  |  |         |   |            | Petrobras Argentina        |  | 2014       
|Río Atuel                         |  |  |    |   |          | Mendoza                          |                  |  | 33.33  | %        |  |  |         |   |            | Tecpetrol                  |  | 2015       
|Borde del Limay                   |  |  |    |   |          | Neuquén                          |                  |  | 85.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2015       
|Los Vértices                      |  |  |    |   |          | Neuquén                          |                  |  | 85.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2015       
|Veta Escondida y Rincón de Aranda |  |  |    |   |          | Neuquén                          |                  |  | 55.00  | %        |  |  |         |   |            | Petrobras Argentina        |  | 2027       



|(1) | See Note 31.
|--- | ------------

|(2) | The Company signed an agreement with Petrolera Pampa SA to make additional investments in well drilling, which would entitle the latter to provide
43% of the proceeds thereof.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | The granting of the concession is in progress and the term will be 25 years from such granting.
|--- | -----------------------------------------------------------------------------------------------



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27.4.2 Associates joint operations



|                |  |           |  |                  |   |  |          |  |       |          |  |                 |  |     
|--------------- |  | --------- |  | ---------------- | - |  | -------- |  | ----- | -------- |  | --------------- |  | ----
|                |  |           |  | WORKING INTEREST |   |  |          |  |      
|NAME            |  | LOCATION  |  | DIRECT           |   |  | INDIRECT |  |       | OPERATOR |  | DURATIONTHROUGH
|PRODUCTION      |  |           |  |                  |   |  |          |  |       |          |  |                 |  |     
|Foreign         |  |           |  |                  |   |  |          |  |       |          |  |                 |  |     
|OritupanoLeona |  | Venezuela |  |                  |  |  |          |  | 22.00 | %        |  | PDVSA           |  | 2025
|Acema           |  | Venezuela |  |                  |  |  |          |  | 34.49 | %        |  | PDVSA           |  | 2025
|La Concepción   |  | Venezuela |  |                  |  |  |          |  | 36.00 | %        |  | PDVSA           |  | 2025
|Mata            |  | Venezuela |  |                  |  |  |          |  | 34.49 | %        |  | PDVSA           |  | 2025

27.5. Production concession in the Veta Escondida area

On April 4, 2012 by the sanction of the Provincial Decree No. 563/12, Petrobras Argentina was notified of a
decision of the government of the Province of Neuquén to terminate the production concession in the Veta Escondida area. The Company has sought judicial relief alleging that it has complied with all requirements under the concession and that
it did not commit any breach which would support the decision adopted by the Government of Neuquén.

On
December 19, 2013, Petrobras Argentina (as operator) and Total Austral, having an interest of 55% and 45% in the Veta Escondida exploitation concession, respectively, reached an out-of-court agreement with the Province of Neuquén and GyP
to settle the dispute arising from the enactment of Provincial Decree No. 563/12, which declared the expiration of the concessionaires rights under this exploitation concession, and led Petrobras Argentina to bring a complaint against the
Province of Neuquén.

The issuance of a Provincial Executive Branch Decree approving this agreement is
pending.

27.6. Investment commitments

In Argentina, pursuant to its participation in the consortia that are responsible for the exploration of oil fields Rio
Colorado, Rio Atuel, Limay and Chirete, at December 31, 2013 the Company has investment commitments of approximately US$ 8 million, which includes the drilling of exploratory wells.

27.7. Relevant information

Relevant information on assets, liabilities and results related to the Companys interests in joint operations as of December 31, 2013, 2012 and January 1, 2012, includes the following:



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|                        |  |      |       |  |      |  |       |            |  |  |       | 
|----------------------- |  | ---- | ----- |  | ---- |  | ----- | ---------- |  |  | ----- | 
|                        |  | 2013 |       |  | 2012 |  |       | 01.01.2012 | 
|Assets and liabilities  |  |      |       |  |      |  |       |            |  |  |       | 
|Current assets          |  |      | 467   |  |      |  | 362   |            |  |  | 139   | 
|Non-current assets      |  |      | 3,255 |  |      |  | 2,762 |            |  |  | 1,563 | 
|                        |  |      |       |  |      |  |       |            |  |  |       | 
|Total assets            |  |      | 3,722 |  |      |  | 3,124 |            |  |  | 1,702 | 
|                        |  |      |       |  |      |  |       |            |  |  |       | 
|Current liabilities     |  |      | 1,011 |  |      |  | 737   |            |  |  | 322   | 
|Non-current liabilities |  |      | 609   |  |      |  | 476   |            |  |  | 190   | 
|                        |  |      |       |  |      |  |       |            |  |  |       | 
|Total liabilities       |  |      | 1,620 |  |      |  | 1,213 |            |  |  | 512   | 
|                        |  |      |       |  |      |  |       |            |  |  |       | 

Statements of income

For the years ended December 31, 2013, 2012 and 2011



|                                    |  |      |        |   |      |  |        |      |  |  |        |  
|----------------------------------- |  | ---- | ------ | - | ---- |  | ------ | ---- |  |  | ------ | -
|                                    |  | 2013 |        |   | 2012 |  |        | 2011 | 
|Sales                               |  |      | 3,413  |   |      |  | 2,721  |      |  |  | 1,814  |  
|Cost of sales                       |  |      | (2,884 | ) |      |  | (1,960 | )    |  |  | (1,383 | )
|                                    |  |      |        |   |      |  |        |      |  |  |        |  
|Gross profit                        |  |      | 529    |   |      |  | 761    |      |  |  | 431    |  
|Administrative and selling expenses |  |      | (97    | ) |      |  | (67    | )    |  |  | (41    | )
|Exploration expenses                |  |      | (43    | ) |      |  | (148   | )    |  |  | (41    | )
|Other operating expenses, net       |  |      | (24    | ) |      |  | (28    | )    |  |  | (31    | )
|Financial results                   |  |      | (210   | ) |      |  | (87    | )    |  |  | (43    | )
|                                    |  |      |        |   |      |  |        |      |  |  |        |  
|Net income before tax               |  |      | 155    |   |      |  | 431    |      |  |  | 275    |  
|                                    |  |      |        |   |      |  |        |      |  |  |        |  



|28. | Operations in Ecuador
|--- | ---------------------

As from 2006 the Ecuadorian Government introduced major tax and regulatory reforms in the hydrocarbon sector which resulted in significant changes to the terms and conditions set forth at the time of
execution of the Participation Agreements.

Amendatory Agreements and Law amending the Hydrocarbon Law

On October 31, 2008, EcuadorTLC S.A., Teikoku Oil Ecuador and Petroecuador, among others, executed the Amendatory
Agreements regulating the operation of Block 18 and Palo Azul while the parties negotiated the migration to a new contract modality.

On July 26, 2010, the amendment to the Hydrocarbon Law in force was approved by operation of law, which provided for, among other things, the obligation to migrate to a new contract modality before
November 24, 2010.

As a result of the negotiation process mentioned above, the Company decided not to
accept the final proposal received from the Ecuadorian government to migrate to Service Agreements in Block 18 and Palo Azul Unified Field. Consequently, through Resolution dated November 25, 2010 the Hydrocarbon Secretary notified EcuadorTLC
S.A. the termination of the Participation Agreements and instructed Petroamazonas EP to undertake the operational transition process.

Section 9 of the Amendatory Agreements indicates that the Ecuadorian government must compensate the terminated parties in an amount equivalent to unamortized investments adjusted by a variable rate
and provides for a period of time for the Ecuadorian government and the terminated parties to work out the details of the termination payment.



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On March 18, 2011, the Hydrocarbon Secretary issued Official Notice No. 626 to inform
the Company that it was analyzing and structuring a new regulatory framework to determine a settlement price for the termination, to be applied instead of the provisions of the Amendatory Agreements. On April 11, 2011, the Company filed an
answer to the Official Notice and rejected the terms thereof claiming these did not comply with the conditions set forth in the Amendatory Agreements by the parties concerned, which conditions may not be unilaterally modified. In this respect, the
Company informed the Hydrocarbon Secretary that it would continue to seek compliance with the terms of the Amendatory Agreements.

In the absence of further action by the Ecuadorian government, on December 9, 2011, Petrobras Argentina served a notice on the Ecuadorian government (Trigger Letter) informing it of the existence of
a dispute under the terms of the Treaty for the Promotion and Reciprocal Protection of Investments previously entered into between Argentina and Ecuador. Under the Treaty, this implies the opening of a negotiation period prior to a possible
arbitration to seek enforcement of the provisions of the Amendatory Agreements.

On June 21, 2013, not
having reached an agreement with the Ecuadorian government, EcuadorTLC SA, Cayman International Exploration Company and Teikoku Oil Ecuador, members of the joint operation, submitted to the Ecuadorian Government a letter of notification of a dispute
under the terms of the Amendatory Agreements, stating their decision to submit the dispute to international arbitration under the arbitration Rules of the United Nations Commission on International Trade Law.

At December 31, 2013 the Company has recorded 347 to be recovered from the Ecuadorian State in accordance with the
provisions of the Amendatory Agreements, disclosed in Other current receivables (Note 15). This amount does not include the interest calculation for update, as the Company believes that it is not possible to determine with certainty the interest
rate to be applied.

As of the date of these financial statements, the Company has taken all the necessary
procedural steps to sustain its rights to receive from the Ecuadorian Government the compensation provided for in the Amendatory Agreements.

Crude Oil Transportation Agreement with OCP

The Company entered into an agreement with OCP, whereby it has secured an oil transportation capacity of 80,000 barrels per day for a 15-year term starting November 10, 2003.

The type of transportation agreement is Ship or Pay. Therefore, the Company must comply with its contractual
obligations for the aggregate committed capacity, regardless of the amount of crude oil actually transported, and pay, like the other producers, a rate that covers OCP operating costs and financial services, among others.

While the Amended Agreements remained in force, transportation capacity costs invoiced by OCP were charged to expenses on
a monthly basis. Costs related to the crude oil volume actually transported were charged to the Administrative and selling expenses line, while the portion related to the unused committed transportation capacity, was shown under
Other operating expenses, net line (Note 9).

The Company is entitled to sell transportation
capacity through the OCP to mitigate the negative effect resulting from the excess capacity contracted. In this respect, the Company periodically negotiates the sale of committed transportation capacity. On December 31, 2008, the Company and
Petroecuador entered into an agreement under which the Ecuadorian State undertook the commitment that transportation as from January 1, 2009 of its crude oil through the OCP will be charged to the transportation capacity committed under the
agreement entered into between the Company and OCP, up to a maximum of 70,000 barrels per day. In addition, the Company sold transportation capacity of approximately 8,000 oil barrels per day to third parties for the July 2004-January 2012 period.
In October 2008, 40% of the net contractual commitment, resulting from the above mentioned, was assumed by Teikoku Oil Ecuador, as consideration for the assignment to the Company of a 40% interest in Block 18 and Palo Azul.

As of December 31, 2013 and 2012, related current and non current liabilities relating to the outstanding ship
or pay contract amount to 92 and 288 respectively (Note 26.2). Assumptions used to calculate the provisions estimate mainly include the applicable rate charged by OCP and carrying capacity used by others. The discount rates used for
measurement consider the nature of the liability, the business segment and country where the operations are conducted.



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As in order to secure compliance with its financial commitments related to the Ship or
Pay transportation agreement entered into with OCP and those related to OCP commercial obligations, the Company issued letters of credit. These letters of credit, due December 2018, will be released in the same proportion as the above
commitments are settled. As of December 31, 2013, the Company issued letters of credit for a total amount of approximately US$74 million. As the letters of credit expire, the Company will be required to renew or replace them to avoid the
upfront payment in cash of the outstanding amount committed.

Investment in OCP

OCP holds interpretative divergences with the Ecuadorian tax authorities. During the year 2013 several inconsistent court
rulings were issued. As of the date of these financial statements, OCP ́s management is analyzing the administrative or judicial remedies available. The Companys management estimates that the outcome of these differences with the
Ecuadorian tax authorities will not have a significant adverse effect on the financial position of the Company.



|29. | Contributions to finance additions to infrastructure in the energy sector in Argentina
|--- | --------------------------------------------------------------------------------------

29.1. FONINVEMEM, 2008/2011 Agreement and Secretary of Energy Resolution No.95/2013 :

Through Resolution No. 712/04, the SE created the FONINVEMEM I trust for the purpose of granting creditors an
incentive to invest in the MEM thus increasing the generation of electrical power in Argentina. In 2007, through Resolution S.E. No.564/07, the Secretary of Energy requested MEM agents to participate in FONINVEMEM II, with the purpose of
complementing financing of FONINVEMEM I.

In addition, in November 2010 the Secretary of Energy and MEM
generators (among which the Company is included) entered into an agreement for the following purposes: (i) enable addition of new generation capacity to meet the increase in demand for Energy and Power in the MEM; (ii) improve availability
of existing generation equipment; (iii) determine a method to pay the amounts due to the generators accumulated in the 2008/2011 period, and (iv) recognize a higher Power price and an increase in recognized operating and maintenance costs.

The 24 January 2012 by Secretary of Energy Resolution No.495/12 suspended the greater recognition of
operation and maintenance costs and higher prices of power affecting the remuneration paid to generators.

The
March 26, 2013, the Secretary of Energy issued Resolution No. 95 which involved the change in the compensation of Generators, Cogeneration and Self-Generators MEM except the Generators Plus, the Binational Hydroelectric Generation and
Nuclear Generation among others. Its main changes is the modification being paid Included Generators, for the case of Petrobras comprising the Combined Cycle and Hydroelectric Genelba Pichi Picún Leufú. The new resolution established
that the generators had the option of joining or not the conditions. The May 31, 2013, the company adhered to the new rules being the above mentioned central framed under the new resolution.

FONINVEMEM

The financing of FONINVEMEM I and II was made through the contribution of 65% and 50% of the credit balances recorded in 2004-2006 and in 2007, respectively, resulting from the spread between the selling
price of energy and the variable generation cost. The total contribution in FONINVEMEM I by all the private power generating companies in the wholesale electric market is estimated at US$ 470 million, of which Petrobras Argentina contributed
US$ 42 million. In addition, the Company was reimbursed the credit balances recorded in 2007 in the amount of US$16 million pursuant to Resolution No.564/07.

On October 17, 2005 and under the terms of Resolution No. 1,193 issued by the Secretary of Energy, Petrobras Argentina and other MEM creditors formally announced their decision to participate in
the construction, operation and maintenance of two power plants of combined cycle 820 MW each. The construction cost of both plants was approximately US$ 1.3 billion and was partially funded with the net contributions made by the private power
generating companies to FONINVEMEM I and II.



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For the purposes of the purchase of equipment and the construction, operation and maintenance
of the power plants, two trusts funds were created. The procurement of the equipment, construction, operation and maintenance of each power plant will be undertaken by Termoeléctrica José de San Martín S.A. and
Termoeléctrica Manuel Belgrano S.A., which will enter into a ten-year electricity supply agreement with CAMMESA for the 80% of the energy output, at a price that will allow to cover all costs. Also the contract provides the reimbursements of
the FONINVEMEM and the repayment of the debt used to finance the initial investment. The 20% of the electricity output is sold in the spot market. Upon expiration of the supply agreement, the ownership of the assets held in trust will be transferred
to the power generation companies proportionally to their contributions to finance the capital expenditure.

End of December 31, 2009, the gas turbines of both power plants were operating in open cycle mode and started to
operate in combined cycle as from the first quarter of 2010.

The Company recovers the amounts contributed to
the FONINVEMEM I, converted to US$ and adjusted by Libo rate + 1% p.a., in 120 monthly installments starting March 2010, upon authorization of commercial operations of both power plants in the combined cycle mode referred to above.

By December 31, 2009 the funds contributed by the Company to FONINVEMEM II had been fully recovered through
investment in additional electricity generation projects under Resolution No. 564/2007 issued by the Secretary of Energy, whereby the Company built Genelba Plus, a 165 MW thermoelectric plant close to the existing Genelba Power Plant.

2008/2011 Agreement

On November 25, 2010, the Secretary of Energy and MEM Generators signed the 2008/2011 Agreement which will be implemented through new generation projects that have to be submitted by Generators to
the Secretary of Energy for selection and subsequent approval.

As regards payment to generators entered into
the Agreement, certain methods established for them to maintain contribution margins, mainly as regards the Power price, recognition of higher variable maintenance costs and other non-fuel costs. The indicated mechanism was in effect until
December 31, 2011, with the implementation of the Resolution No.495/12 indicated above.

In October 2011,
the Company and the Secretary of Energy entered into a Supplemental Agreement to the 2008/2011 Agreement, under which the Secretary of Energy approved the general terms of an investment project submitted by the Company for the closing of the
combined cycle in Genelba Plus current unit.

Such Supplemental Agreement provides for a term of one year for
implementation and execution, after that period, the Agreement may be terminated in the event that some of the parties so desired, generating no further responsibility for any of those involved. Currently negotiations are continuing with the
Government to advance the project.

Secretary of Energy Resolution No. 95/2013 :

In March 2013 , the Secretary of Energy issued Resolution No. 95/2013 which involved the modification of the
remuneration scheme of Generators, Cogeneration and Self-Generators MEM except the Generators Plus , the Binational Hydroelectric Power Generation and Nuclear Generation among others.

The main changes apply to generators that have joined this new scheme are:

a) Changes in the remuneration of generating agents by scale and technology . Fixed costs and non-fuel
variables as well as additional remuneration are paid (the latter two items will be paid based on the generation of each machine) . Part of the additional compensation will go to a trust fund works the electricity sector.

b ) Temporary Suspension of contracts between private , both electrical energy and fuels and associated
inputs, which will be administered by CAMMESA



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29.2. Fideicomiso Financiero de Obra Gasoducto Sur (Financial Trust for South Gas Pipeline)

In order to assist in financing the expansion of the transportation capacity of the General San
Martín Gas Pipeline, in the offshore leg across the Straits of Magellan, in the fourth quarter of 2009 Petrobras Argentina underwrote bonds issued by Fideicomiso Financiero de Obra Gasoducto Sur, for an amount in pesos equal to US$30 million.

Petrobras Argentina received in exchange debt securities denominated in Argentine pesos (VRD Obra-4
Estrecho Definitivos) that bear interest at a rate equivalent to the Reference Stabilization Coefficient plus an annual nominal rate of 8%. The principal amortizes in 30 quarterly installments from April 25, 2011.



|30. | Contractual commitments, warranty bonds, sureties and guarantees granted
|--- | ------------------------------------------------------------------------

The warranty bonds, securities and guarantees as of December 31, 2013, 2012 and January 1, 2012, which are not
disclosed in other notes, amount to 120, 45 and 18, respectively.

Additionally, in certain business
operations in which the Company and the counterparty act as customers and suppliers, both sides issued guarantees for such operations by equivalent values, which at 31 December 2013 amount to 241.

In addition, as of December 31, 2013, the Company had the following contractual commitments:



|                                              |  |  |    |   |              |  |       |                         |  |  |        |  |  |  |      | 
|--------------------------------------------- |  |  | -- | - | ------------ |  | ----- | ----------------------- |  |  | ------ |  |  |  | ---- | 
|                                              |  |  |    |   | Total(units) |  |       | Total(Millionsof
Pesos) |  |  | Until  | 
|Purchase Commitments                          |  |  |    |   |              |  |       |                         |  |  |        |  |  |  |      | 
|                                              |  |  |    |  
|Longterm service agreement                   |  |  | (2 | ) |              |  |      |                         |  |  | 2,054  |  |  |  | 2031 | 
|Petroleum services and materials              |  |  | (2 | ) |              |  |      |                         |  |  | 5,151  |  |  |  | 2018 | 
|Transportation capacity (in Mdam3)            |  |  | (1 | ) |              |  | 4,804 |                         |  |  | 1,541  |  |  |  | 2032 | 
|Gas purchase agreement for Genelba (in Mdam3) |  |  |    |   |              |  | 685   |                         |  |  | 193    |  |  |  | 2019 | 
|Gasolinas (in MMm3)                           |  |  |    |   |              |  | 6     |                         |  |  | 11,681 |  |  |  | 2026 | 
|                                              |  |  |    |  
|Sales commitments                             |  |  |    |   |              |  |       |                         |  |  |        |  |  |  |      | 
|Natural gas (in MMm3)                         |  |  |    |   |              |  | 4,572 |                         |  |  | 1,395  |  |  |  | 2019 | 
|Electric power (in thousands of MWh)          |  |  |    |   |              |  | 5,497 |                         |  |  | 5,433  |  |  |  | 2022 | 
|LPG (in thousands of tons)                    |  |  |    |   |              |  | 215   |                         |  |  | 1,803  |  |  |  | 2021 | 
|Oil                                           |  |  |    |   |              |  |      |                         |  |  |       |  |  |  | 2014 | 
|Gasolinas (in millions of cubic meters)       |  |  |    |   |              |  | 3     |                         |  |  | 7,226  |  |  |  | 2026 | 



|(1) | Estimated price of $0.32 per MMm3.
|--- | ----------------------------------

|(2) | Prices are generally determined by formulas based on future market prices. Estimated prices used to calculate the monetary equivalent of these
purchase commitments for purposes of the table are based on current market prices as of December 31, 2013 and may not reflect actual future prices. Accordingly, the peso amounts provided in this table with respect to these commitments are
provided for illustrative purpose only.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|31. | Subsequent events
|--- | -----------------



| | a) | Sale of Puesto Hernández Joint Operation agreement
| | -- | --------------------------------------------------

On January 31, 2014 the Board of Directors approved the sale to YPF S.A. of the entire interest in the Puesto
Hernández Joint Operation (UTE) agreement, for a total price of USD 40.7 millions and recognized income before income tax of 181. This transaction represents for the Company an early termination of the Joint Operation (UTE) agreement, entered
into with YPF S.A. in 1991.



| | b) | Shareholders Meeting of Petrobras Argentina S.A.
| | -- | -------------------------------------------------

On March 27, 2014, the Shareholders of Petrobras Argentina in their General Regular meeting: (a) approved
(i) in accordance with legal requirements, an increase of Ps. 714 million in the reserve for future investments and the transfer to the legal reserve of Ps. 38 million based on our results in 2013, (ii) a net decrease of Ps.
225 million in the reserve for future investments (consisting of an increase in the amount of Ps. 2,299 million and a decrease in the amount of Ps. 2,524 million), and an increase of Ps. 225 million in the reserve for future
dividends; and (b) delegated with the Board of Directors the determination of the actual the dividend distribution date and amount. As a result of the foregoing, as of the date of this Annual Report, the reserve for future dividends amounts to
Ps. 1,275 million and the reserve for future investments amounts to Ps. 5,432 million.



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| | c) | New Area for the Exploration of Non Conventionals
| | -- | -------------------------------------------------

The joint operation (UTE) agreement for the exploration and potential exploitation of the area Parva Negra Este, was
approved by the Executive Branch of the province of Neuquén through Decree No. 575/14, published on April 4, 2014. The Company has the commitment to drill four onshore wells in the next two years, with a guaranteed amount of USD 27 million
for the first year.



|32. | Expenses classified by nature for the years ended December 31, 2013, 2012 and 2011
|--- | ----------------------------------------------------------------------------------

(Stated in millions of Argentine pesos)



|                                              |  |       |       |   |       |  |       |       |  |  |       |   |  |                                   |       |   |                     |  |       |   |  |  |     | 
|--------------------------------------------- |  | ----- | ----- | - | ----- |  | ----- | ----- |  |  | ----- | - |  | --------------------------------- | ----- | - | ------------------- |  | ----- | - |  |  | --- | 
|                                              |  | 2011  |       |   | 2012  |  |       | 2013  | 
|Accounts                                      |  | Total |       |   | Total |  |       | Total |  |  | Costs |   |  | Administrativeand sellingexpenses |       |   | Explorationexpenses | 
|Salaries and wages                            |  |       | 854   |   |       |  | 1,069 |       |  |  | 1,269 |   |  |                                   | 604   |   |                     |  | 665   |   |  |  |    | 
|Other benefits to personnel                   |  |       | 219   |   |       |  | 199   |       |  |  | 292   |   |  |                                   | 132   |   |                     |  | 160   |   |  |  |    | 
|Taxes, charges and contributions              |  |       | 192   |   |       |  | 260   |       |  |  | 365   |   |  |                                   | 25    |   |                     |  | 340   |   |  |  |    | 
|Fees and professional advisory                |  |       | 82    |   |       |  | 86    |       |  |  | 104   |   |  |                                   | 4     |   |                     |  | 100   |   |  |  |    | 
|Depreciation of property, plant and equipment |  |       | 1,205 |   |       |  | 1,738 |       |  |  | 2,194 |   |  |                                   | 2,131 |   |                     |  | 63    |   |  |  |    | 
|Oil and gas royalties                         |  |       | 578   |   |       |  | 823   |       |  |  | 1,128 |   |  |                                   | 1,128 |   |                     |  |      |   |  |  |    | 
|Spare parts and repairs                       |  |       | 398   |   |       |  | 536   |       |  |  | 640   |   |  |                                   | 580   |   |                     |  | 60    |   |  |  |    | 
|Geological and geophysical expenses           |  |       | 97    |   |       |  | 44    |       |  |  | 55    |   |  |                                   |      |   |                     |  |      |   |  |  | 55  | 
|Abandoned and non-productive well write-downs |  |       | 294   |   |       |  | 168   |       |  |  | 27    |   |  |                                   |      |   |                     |  |      |   |  |  | 27  | 
|Transportation and freights                   |  |       | 397   |   |       |  | 438   |       |  |  | 522   |   |  |                                   | 179   |   |                     |  | 343   |   |  |  |    | 
|Procurement of works and services             |  |       | 1,065 |   |       |  | 1,518 |       |  |  | 1,945 |   |  |                                   | 1,812 |   |                     |  | 133   |   |  |  |    | 
|Fuel, gas, energy and other                   |  |       | 54    |   |       |  | 91    |       |  |  | 129   |   |  |                                   | 119   |   |                     |  | 10    |   |  |  |    | 
|Other operating costs and consumptions        |  |       | 98    |   |       |  | 177   |       |  |  | 207   |   |  |                                   | 150   |   |                     |  | 57    |   |  |  |    | 
|Expense reimbursements                        |  |       | (164  | ) |       |  | (185  | )     |  |  | (200  | ) |  |                                   | (66   | ) |                     |  | (134  | ) |  |  |    | 
|                                              |  |       |       |   |       |  |       |       |  |  |       |   |  |                                   |       |   |                     |  |       |   |  |  |     | 
|Total 2013                                    |  |       |       |   |       |  |       |       |  |  | 8,677 |   |  |                                   | 6,798 |   |                     |  | 1,797 |   |  |  | 82  | 
|                                              |  |       |       |   |       |  |       |       |  |  |       |   |  |                                   |       |   |                     |  |       |   |  |  |     | 
|Total 2012                                    |  |       |       |   |       |  | 6,962 |       |  |  |       |   |  |                                   | 5,320 |   |                     |  | 1,430 |   |  |  | 212 | 
|                                              |  |       |       |   |       |  |       |       |  |  |       |   |  |                                   |       |   |                     |  |       |   |  |  |     | 
|Total 2011                                    |  |       | 5,369 |   |       |  |       |       |  |  |       |   |  |                                   | 3,756 |   |                     |  | 1,222 |   |  |  | 391 | 
|                                              |  |       |       |   |       |  |       |       |  |  |       |   |  |                                   |       |   |                     |  |       |   |  |  |     | 



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GLOSSARY:



|           |  |                                                                                                                                                                                                         
|---------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|AFIP       |  | Administración Federal de Ingresos Públicos (Argentine Federal Public Revenues Administration)                                                                                                          
|           | 
|ADS        |  | American Depositary Shares                                                                                                                                                                              
|           | 
|BCBA       |  | Buenos Aires Stock Exchange                                                                                                                                                                             
|           | 
|BOE        |  | Barrel Oil Equivalent                                                                                                                                                                                   
|           | 
|BOL        |  | Bolivares                                                                                                                                                                                               
|           | 
|BOPS       |  | Bi-oriented polystyrene                                                                                                                                                                                 
|           | 
|CAMMESA    |  | Compañía Administradora del Mercado Mayorista Eléctrico S.A.                                                                                                                                            
|           | 
|CGN        |  | Compressed Natural Gas                                                                                                                                                                                  
|           | 
|CIESA      |  | Compañía de Inversiones de Energía S.A.                                                                                                                                                                 
|           | 
|CNDC       |  | Comisión Nacional de Defensa de la Competencia (Argentine Anti-Trust Authorities)                                                                                                                       
|           | 
|CNV        |  | Comisión Nacional de Valores (Argentine Securities Comisión)                                                                                                                                            
|           | 
|CPCECABA   |  | Consejo Profesional de Ciencias Económicas de la Ciudad Autónoma de Buenos Aires (Professional Council in Economic Sciences of the City of Buenos
Aires)                                                
|           | 
|Distrilec  |  | Distrilec Inversora S.A.                                                                                                                                                                                
|           | 
|Edesur     |  | Empresa Distribuidora Sur S.A. (Edesur S.A.)                                                                                                                                                            
|           | 
|EEUU       |  | Estados Unidos de Norteamérica (United States of America)                                                                                                                                               
|           | 
|ENARGAS    |  | Ente Nacional Regulador del Gas (Argentine Gas Regulatory Agency)                                                                                                                                       
|           | 
|ENARSA     |  | Energía Argentina S.A.                                                                                                                                                                                  
|           | 
|ENRE       |  | Ente Nacional Regulador de la Electricidad (Federal Power Regulation Authority)                                                                                                                         
|           | 
|EPCA       |  | Enron Pipeline Company Argentina S.A.                                                                                                                                                                   
|           | 
|EU         |  | Euros                                                                                                                                                                                                   
|           | 
|FACPCE     |  | Federación Argentina de Consejos Profesionales de Ciencias Económicas(Argentine Federation of Professional Councils in Economic Sciences)                                                               
|           | 
|FONINVEMEM |  | Fondo para las Inversiones Necesarias que permitan Incrementar la Oferta de Energía Eléctrica (Fund for the Investments Required to Increase the Electric
Power Supply in the Electric Wholesale Market)
|           | 
|GWh        |  | Giga Watts hour                                                                                                                                                                                         
|           | 
|GyP        |  | Gas y Petróleo del Neuquén                                                                                                                                                                              
|           | 
|HES        |  | Quality, Safety, Environmental and Health policies and guidelines                                                                                                                                       
|           | 
|IASB       |  | International Accounting Standards Board                                                                                                                                                                
|           | 
|IFO        |  | Intermediate Fuel Oil                                                                                                                                                                                   
|           | 
|IFRS       |  | International Financial Reporting Standards                                                                                                                                                             
|           | 
|IPACE      |  | Argentine Professional Institute for Quality and Excellence                                                                                                                                             
|           | 
|LNG        |  | Liquid Natural Gas                                                                                                                                                                                      
|           | 
|LPG        |  | Liquefied Petroleum Gas                                                                                                                                                                                 
|           | 
|LSC        |  | Ley de Sociedades Comerciales (Business Associations Law)                                                                                                                                               



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|                    |  |                                                                                                                               
|------------------- |  | ------------------------------------------------------------------------------------------------------------------------------
|Mbbl                |  | Thousands of barrels                                                                                                          
|                    | 
|MEM                 |  | Mercado Eléctrico Mayorista (Wholesale Electricity Market)                                                                    
|                    | 
|MEP                 |  | Ministerio de Energía y Petróleo de Venezuela (Venezuelan Energy and Oil Ministry)                                            
|                    | 
|MMcf                |  | Millions of cubit meters                                                                                                      
|                    | 
|Mcf                 |  | Millions of cubit foot                                                                                                        
|                    | 
|MOA                 |  | Memorandum of Agreement                                                                                                       
|                    | 
|MPFIPyS             |  | Ministerio de Planificación Federal, Inversión Pública y Servicios (Federal Planning, Public Investment and Services Ministry)
|                    | 
|MW                  |  | Mega Watts                                                                                                                    
|                    | 
|MWh                 |  | Mega Watts Hour                                                                                                               
|                    | 
|m3                  |  | Cubit Meters                                                                                                                  
|                    | 
|NRV                 |  | Net Realizable Value                                                                                                          
|                    | 
|NYSE                |  | New York Stock Exchange                                                                                                       
|                    | 
|OCI                 |  | Other Comprehensive Income                                                                                                    
|                    | 
|OCP                 |  | Oleoducto de Crudos Pesados Ltd.                                                                                              
|                    | 
|OHSAS               |  | Occupational Health and Safety Assessment Series                                                                              
|                    | 
|ONG                 |  | Nongovernmental Organization                                                                                                  
|                    | 
|OPEC                |  | Organization of the Petroleum Exporting Countries                                                                             
|                    | 
|PDVSA               |  | Petróleos de Venezuela S.A.                                                                                                   
|                    | 
|PEDASA              |  | Petrobras Electricidad de Argentina S.A.                                                                                      
|                    | 
|PELSA               |  | Petrolera Entre Lomas S.A.                                                                                                    
|                    | 
|PEN                 |  | Poder Ejecutivo Nacional (Executive Branch of Government)                                                                     
|                    | 
|PEPSA               |  | Petrobras Energía Participaciones S.A.                                                                                        
|                    | 
|PES / Ps.           |  | Argentine Pesos                                                                                                               
|                    | 
|Petróleo Brasileiro |  | Petróleo Brasileiro S.A.  PETROBRAS.                                                                                         
|                    | 
|PIB BV              |  | Petrobras Internacional Braspetro BV                                                                                          
|                    | 
|PVIE                |  | Petrobras Valores Internacional de España S.L.                                                                                
|                    | 
|Rls                 |  | Reales                                                                                                                        
|                    | 
|RT                  |  | Technical Resolution                                                                                                          
|                    | 
|RTI                 |  | Revisión Tarifaria Integral (Overall Tariff Revision)                                                                         
|                    | 
|SCyCG               |  | Subsecretaría de Coordinación y Control de Gestión (Undersecretariat of Coordination and Control of Government Affairs)       
|                    | 
|SEC                 |  | Security and Exchange Commission                                                                                              
|                    | 
|SFAS                |  | Statement of Financial Accounting Standard                                                                                    
|                    | 
|TGS                 |  | Transportadora de Gas del Sur S.A.                                                                                            
|                    | 
|Tn                  |  | Tonnes                                                                                                                        



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|       |  |                                                                                                                                 
|------ |  | --------------------------------------------------------------------------------------------------------------------------------
|UNIREN |  | Unidad de Renegociación y Análisis de Contratos de Servicios Públicos (Public Service Agreement Renegotiation and Analysis Unit)
|       | 
|US$    |  | United States Dollars                                                                                                           
|       | 
|WACC   |  | Weighted Average Cost of Capital                                                                                                
|       | 
|WTI    |  | West Texas Intermediate                                                                                                         
|       | 
|WTS    |  | West Texas Sour                                                                                                                 
|       | 
|YPFB   |  | Yacimientos Petrolíferos Fiscales Bolivianos                                                                                    
|       | 
|$ BOL  |  | Bolivian Pesos                                                                                                                  



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.



|                                                                                                                           |  |     
|-------------------------------------------------------------------------------------------------------------------------- |  | ----
|Report of independent registered public accounting firm of Compañía de Inversiones de Energía S.A. as of December 31,
2012 |  | F-83
|                                                                                                                           | 
|Consolidated balance sheets of CIESA as of December 31, 2013, 2012 and 2011                                                |  | F-84
|                                                                                                                           | 
|Consolidated statements of income of CIESA for the years ended December 31, 2013, 2012 and 2011                            |  | F-85
|                                                                                                                           | 
|Consolidated statements of cash flows of CIESA for the years ended December 31, 2013, 2012 and 2011                        |  | F-86
|                                                                                                                           | 
|Consolidated statements of changes in equity of CIESA for the years ended December 31, 2013, 2012 and 2011                 |  | F-87
|                                                                                                                           | 
|Notes to the consolidated financial statements of CIESA for the years ended 2013, 2012 and 2011                            |  | F-88



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Independent Auditors Report

To the Board of Directors and Shareholders of

Compañía de Inversiones de Energía S.A.

We have audited the accompanying consolidated financial statements of Compañía de Inversiones de Energía S.A. and its subsidiaries, which comprise the consolidated balance sheet as of
December 31, 2012 and the related consolidated statements of income, of changes in shareholders equity and of cash flows for the year then ended.

Managements Responsibility for the Consolidated Financial Statements

Management is responsible for the preparation and fair presentation of the consolidated financial statements in accordance with accounting principles generally accepted in Argentina; this includes the
design, implementation, and maintenance of internal control relevant to the preparation and fair presentation of consolidated financial statements that are free from material misstatement, whether due to fraud or error.

Auditors Responsibility

Our responsibility is to express an opinion on the consolidated financial statements based on our audit. We conducted our audit in accordance with auditing standards generally accepted in the United
States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free from material misstatement.

An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in the consolidated financial
statements. The procedures selected depend on our judgment, including the assessment of the risks of material misstatement of the consolidated financial statements, whether due to fraud or error. In making those risk assessments, we consider
internal control relevant to the Companys preparation and fair presentation of the consolidated financial statements in order to design audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an
opinion on the effectiveness of the Companys internal control. Accordingly, we express no such opinion. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of significant accounting
estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our audit opinion.

Opinion

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Compañía de Inversiones de Energía S.A. and
its subsidiaries at December 31, 2012, and the results of its operations and its cash flows for the year then ended in accordance with accounting principles generally accepted in Argentina.



|                              |  |                                                                 |  | 
|----------------------------- |  | --------------------------------------------------------------- |  | 
|PRICE WATERHOUSE & Co. S.R.L. |  |                                                                
|                              |  |                                                                
|By:                           |  | /s/ Carlos N.
Martínez                                (Partner) |  | 
|                              |  | Carlos N. Martínez                                              |  | 

Buenos Aires, Argentina

April 26, 2013



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##### Table of Contents

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED BALANCE SHEETS AS OF DECEMBER 31, 2013, 2012 AND 2011

(In thousands of Argentine pesos as described in Note 2.c.)



2013


2012


2011(non-audited)





(non-audited)CURRENT ASSETSCash and banks


125,664



97,100



237,700Investments (Exhibit D)


1,119,686



744,573



788,230Accounts receivable, net (Note 4.a.)


418,583



449,081



340,387Other receivables(Note 4.b.)


192,193



125,398



71,746Inventories


7,356



54,282



7,588Total current assets


1,863,482



1,470,434



1,445,651NON CURRENT ASSETSAccounts receivable (Note 4.c.)


38,136



48,057



52,111Other receivables(Note 4.d.)


47,898



50,875



307,612Other investments


213,309







Investments (Exhibit C)


32,361



34,324



39,192Property, plant and equipment, net (Exhibit A)


4,016,972



4,000,519



4,012,556Total non-current assets


4,348,676



4,133,775



4,411,471Total assets


6,212,158



5,604,209



5,857,122


2013


2012


2011(non-audited)





(non-audited)CURRENT LIABILITIESAccounts payable(Note 4.e.)


385,419



363,756



296,711Loans (Note 6)


647,809



22,400



1,455,828Payroll and social security taxes payable


67,020



53,221



53,064Taxes payable (Note 4.f.)


76,361



133,511



54,803Dividends payable






68,868



Advances from customers (Note 4.g.)


25,344



24,639



29,208Other liabilities(Note 4.h.)


3,522



2,495



5,744Provisions for contingencies(Exhibit E)


143,412



144,054



130,764Total current liabilities


1,348,887



812,944



2,026,122NON CURRENT LIABILITIESLoans (Note 6)


2,017,705



1,964,620



1,702,310Taxes payable (Note 4.i.)


29,936



30,632



40,198Advances from customers (Note 4.j.)


311,905



279,562



281,126Total non-current liabilities


2,359,546



2,274,814



2,023,634Total liabilities


3,708,433



3,087,758



4,049,756MINORITY INTEREST


1,242,643



1,262,464



1,125,526SHAREHOLDERS EQUITY


1,261,082



1,253,987



681,840Total liabilities and shareholders equity


6,212,158



5,604,209



5,857,122






The accompanying notes are an
integral part of these consolidated financial statements.



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##### Table of Contents

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED STATEMENTS OF INCOME

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(In thousands of Argentine pesos
as described in Note 2.c.

except for per share and per ADS amounts in Argentine pesos)



|                                                 |  |               |            |   |      |  |            |               |  |  |           |  
|------------------------------------------------ |  | ------------- | ---------- | - | ---- |  | ---------- | ------------- |  |  | --------- | -
|                                                 |  | 2013          |            |   | 2012 |  |            | 2011          | 
|                                                 |  | (non-audited) |            |   |      |  |            | (non-audited) | 
|                                                 |  |               |           
|Net revenues (Note 3)                            |  |               | 2,864,986  |   |      |  | 2,574,968  |               |  |  | 1,853,875 |  
|                                                 |  |               |           
|Cost of sales (Exhibit F)                        |  |               | (1,595,319 | ) |      |  | (1,351,734 | )             |  |  | (936,986  | )
|                                                 |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               |           
|GROSS PROFIT                                     |  |               | 1,269,667  |   |      |  | 1,223,234  |               |  |  | 916,889   |  
|                                                 |  |               |           
|Administrative expenses (Exhibit H)              |  |               | (120,124   | ) |      |  | (95,347    | )             |  |  | (87,855   | )
|                                                 |  |               |           
|Selling expenses (Exhibit H)                     |  |               | (457,364   | ) |      |  | (423,233   | )             |  |  | (277,398  | )
|                                                 |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               |           
|OPERATING INCOME                                 |  |               | 692,179    |   |      |  | 704,654    |               |  |  | 551,636   |  
|                                                 |  |               |           
|Other expenses, net (Note 2.r.)                  |  |               | 12,054     |   |      |  | (10,610    | )             |  |  | (5,686    | )
|                                                 |  |               |           
|Loss on related companies                        |  |               | (2,765     | ) |      |  | (2,159     | )             |  |  | (769      | )
|                                                 |  |               |           
|FINANCIAL EXPENSES, NET                          |  |               | (562,984   | ) |      |  | 431,342    |               |  |  | (331,381  | )
|                                                 |  |               |           
|Generated by assets                              |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               |           
|Interest income                                  |  |               | 163,293    |   |      |  | 35,763     |               |  |  | 34,416    |  
|Foreign exchange gain                            |  |               | 162,235    |   |      |  | 103,362    |               |  |  | 82,716    |  
|                                                 |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               | 325,528    |   |      |  | 139,125    |               |  |  | 117,132   |  
|                                                 |  |               |           
|Generated by liabilities                         |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               |           
|Interest expense (Exhibit H)                     |  |               | (230,864   | ) |      |  | (206,603   | )             |  |  | (189,785  | )
|Foreign exchange loss (Exhibit H)                |  |               | (627,182   | ) |      |  | (325,031   | )             |  |  | (233,172  | )
|Result of the debt cancellation (Note 6)         |  |               |           |   |      |  | 844,920    |               |  |  |          |  
|Other expenses and financial charges (Exhibit H) |  |               | (30,466    | ) |      |  | (21,069    | )             |  |  | (25,556   | )
|                                                 |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               | (888,512   | ) |      |  | 292,217    |               |  |  | (448,513  | )
|                                                 |  |               |           
|NET INCOME BEFORE INCOME TAX                     |  |               | 138,484    |   |      |  | 1,123,227  |               |  |  | 213,800   |  
|                                                 |  |               |           
|Income tax expense(1)                            |  |               | (93,248    | ) |      |  | (452,478   | )             |  |  | 73,723    |  
|                                                 |  |               |           
|Minority interest                                |  |               | (38,141    | ) |      |  | (98,602    | )             |  |  | (89,730   | )
|                                                 |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               |           
|NET INCOME FOR THE YEAR                          |  |               | 7,095      |   |      |  | 572,147    |               |  |  | 197,793   |  
|                                                 |  |               |            |   |      |  |            |               |  |  |           |  
|                                                 |  |               |           
|Net income per share (Note 2.s.)                 |  |               | 0.90       |   |      |  | 0.90       |               |  |  | 0.31      |  
|                                                 |  |               |            |   |      |  |            |               |  |  |           |  



|(1) | (Ps 93.248), (Ps. 452.478) and Ps. 73.723 correspond to income tax (expense) / gain for the year ended on December 31, 2013, 2012 and 2011,
respectively (see Note 2.l.)
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The accompanying notes are an integral part of these consolidated financial
statements.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED STATEMENTS OF CASH FLOWS

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(In thousands of Argentine pesos
as described in Note 2.c.)



|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|--------------------------------------------------------------------------- |  | ------------- | -------- | - | ---- |  | -------- | ------------- |  |  | --------- | -
|                                                                            |  | 2013          |          |   | 2012 |  |          | 2011          | 
|                                                                            |  | (non-audited) |          |   |      |  |          | (non-audited) | 
|CASH FLOWS PROVIDED BY OPERATING ACTIVITIES                                 |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Net income for the year                                                     |  |               | 7,095    |   |      |  | 572,147  |               |  |  | 197,793   |  
|                                                                            |  |               |         
|Reconciliation of net income to cash flows provided by operating activities |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Depreciation of property, plant and equipment                               |  |               | 242,917  |   |      |  | 233,670  |               |  |  | 220,388   |  
|Retirement of property, plant and equipment                                 |  |               | 3,891    |   |      |  | 2,696    |               |  |  | 3,455     |  
|Net Increase in allowances and provisions for contingencies                 |  |               | (382     | ) |      |  | 13,374   |               |  |  | 28,216    |  
|Loss on related companies                                                   |  |               | 2,765    |   |      |  | 2,159    |               |  |  | 769       |  
|Minority interest                                                           |  |               | 38,141   |   |      |  | 98,602   |               |  |  | 89,730    |  
|Interest expense                                                            |  |               | 217,881  |   |      |  | 206,603  |               |  |  | 189,785   |  
|Interest income on investments other than cash and cash equivalents         |  |               | (15,585  | ) |      |  | (6,665   | )             |  |  | (1,776    | )
|Result of the debt cancellation                                             |  |               |         |   |      |  | (844,920 | )             |  |  |          |  
|Derivative financial instruments result                                     |  |               | (38,025  | ) |      |  |         |               |  |  |          |  
|Income tax and asset tax expense                                            |  |               | 93,248   |   |      |  | 452,478  |               |  |  | (73,723   | )
|Foreign exchange loss and other financial results                           |  |               | 595,746  |   |      |  | 251,264  |               |  |  | 202,689   |  
|                                                                            |  |               |         
|Changes in assets and liabilities:                                          |  |               |          |   |      |  |          |               |  |  |           |  
|Accounts receivable                                                         |  |               | (870     | ) |      |  | (137,528 | )             |  |  | (97,696   | )
|Other receivables                                                           |  |               | (49,414  | ) |      |  | (36,721  | )             |  |  | (28,644   | )
|Inventories                                                                 |  |               | 46,926   |   |      |  | (46,694  | )             |  |  | 5,323     |  
|Accounts payable                                                            |  |               | 512      |   |      |  | 74,216   |               |  |  | 235       |  
|Derivative financial instruments                                            |  |               | 11,525   |   |      |  |         |               |  |  |          |  
|Advances from customers                                                     |  |               | 33,048   |   |      |  | (6,410   | )             |  |  | 65,184    |  
|Payroll and social security taxes payable                                   |  |               | 13,799   |   |      |  | 157      |               |  |  | 15,536    |  
|Taxes payable                                                               |  |               | (18,375  | ) |      |  | (28,347  | )             |  |  | (10,696   | )
|Other liabilities                                                           |  |               | 226      |   |      |  | (3,249   | )             |  |  | (262      | )
|Provisions for contingencies                                                |  |               | (18,547  | ) |      |  | (84      | )             |  |  | (1,093    | )
|Interest paid                                                               |  |               | (169,475 | ) |      |  | (138,766 | )             |  |  | (124,541  | )
|Income tax and asset tax paid                                               |  |               | (120,673 | ) |      |  | (119,819 | )             |  |  | (186,225  | )
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Net cash provided by operating activities                                   |  |               | 876,374  |   |      |  | 538,163  |               |  |  | 494,447   |  
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|CASH FLOWS PROVIDED BY / (USED IN) INVESTING ACTIVITIES                     |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Payment for the acquisition of property, plant and equipment                |  |               | (235,374 | ) |      |  | (215,438 | )             |  |  | (168,299  | )
|Investments other than cash and cash equivalents                            |  |               | (249,260 | ) |      |  | 595,387  |               |  |  | (649,073  | )
|Dividends collected                                                         |  |               | 136,829  |   |      |  |         |               |  |  | 309       |  
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Net cash used in investing activities                                       |  |               | (347,805 | ) |      |  | 379,949  |               |  |  | (817,063  | )
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|CASH FLOWS USED IN FINANCING ACTIVITIES                                     |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Advances from customers                                                     |  |               |         |   |      |  |         |               |  |  |          |  
|Proceeds from loans                                                         |  |               | 30,000   |   |      |  | 20,000   |               |  |  |          |  
|Dividends paid                                                              |  |               | (263,659 | ) |      |  |         |               |  |  | (436,309  | )
|Payment of loans                                                            |  |               | (4,444   | ) |      |  | (585,347 | )             |  |  |          |  
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Net cash used in financing activities                                       |  |               | (238,103 | ) |      |  | (565,347 | )             |  |  | (436,309  | )
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|NET INCREASE / (DECREASE) IN CASH AND CASH EQUIVALENTS                      |  |               | 290,466  |   |      |  | 352,765  |               |  |  | (758,925  | )
|                                                                            |  |               |         
|Cash and cash equivalents at the beginning of the year                      |  |               | 703,150  |   |      |  | 350,385  |               |  |  | 1,109,310 |  
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  
|                                                                            |  |               |         
|Cash and cash equivalents at the end of the year                            |  |               | 993,616  |   |      |  | 703,150  |               |  |  | 350,385   |  
|                                                                            |  |               |          |   |      |  |          |               |  |  |           |  

For supplemental cash flow information see Note 5.

The accompanying notes are an integral part of these consolidated financial statements.



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##### Table of Contents

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS EQUITY

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011

(In thousands of Argentine pesos
as described in Note 2.c.)



|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 
|------------------------------------------- |  | --------------------------- | ------- |  | ----------------- |  | ------- | ------- |  |  | ----------------- |  |  | ------- | ------- |  | ----------------- |  | ------- | ------------- |  |  | -------- | - |  |  | --------- | 
|                                            |  | Shareholders contributions |         |  | Retained earnings |  |         |         | 
|                                            |  |                             |         |  | Total             |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         | Total         | 
|                                            |  | Common                      |         |  | common            |  |         | Legal   |  |  | Future            |  |  | IFRS    |         |  | Accumulated       |  |         | shareholders | 
|                                            |  | stock                       |         |  | stock             |  |         | reserve |  |  | dividends reserve |  |  | reserve |         |  | retained earnings |  |         | equity        | 
|                                            |  |                             |         |  |                   |  |        
|Balances at December 31, 2010 (non-audited) |  |                             | 638,819 |  |                   |  | 638,819 |         |  |  | 64,531            |  |  |         |        |  |                   |  |        |               |  |  | (219,303 | ) |  |  | 484,047   | 
|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 
|                                            |  |                             |         |  |                   |  |        
|Net income for the year                     |  |                             |        |  |                   |  |        |         |  |  |                  |  |  |         |        |  |                   |  |        |               |  |  | 197,793  |   |  |  | 197,793   | 
|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 
|                                            |  |                             |         |  |                   |  |        
|Balances at December 31, 2011 (non-audited) |  |                             | 638,819 |  |                   |  | 638,819 |         |  |  | 64,531            |  |  |         |        |  |                   |  |        |               |  |  | (21,510  | ) |  |  | 681,840   | 
|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 
|                                            |  |                             |         |  |                   |  |        
|Net income for the year                     |  |                             |        |  |                   |  |        |         |  |  |                  |  |  |         |        |  |                   |  |        |               |  |  | 572,147  |   |  |  | 572,147   | 
|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 
|                                            |  |                             |         |  |                   |  |        
|Balances at December 31, 2012               |  |                             | 638,819 |  |                   |  | 638,819 |         |  |  | 64,531            |  |  |         |        |  |                   |  |        |               |  |  | 550,637  |   |  |  | 1,253,987 | 
|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 
|                                            |  |                             |         |  |                   |  |        
|Legal Reserve                               |  |                             |        |  |                   |  |        |         |  |  | 27,532            |  |  |         |        |  |                   |  |        |               |  |  | (27,532  | ) |  |  |          | 
|Future Dividends Reserve                    |  |                             |        |  |                   |  |        |         |  |  |                  |  |  |         | 246,385 |  |                   |  |        |               |  |  | (246,385 | ) |  |  |          | 
|IFRS Reserve                                |  |                             |        |  |                   |  |        |         |  |  |                  |  |  |         |        |  |                   |  | 276,720 |               |  |  | (276,720 | ) |  |  |          | 
|Net income for the year                     |  |                             |        |  |                   |  |        |         |  |  |                  |  |  |         |        |  |                   |  |        |               |  |  | 7,095    |   |  |  | 7,095     | 
|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 
|                                            |  |                             |         |  |                   |  |        
|Balances at December 31, 2013 (non-audited) |  |                             | 638,819 |  |                   |  | 638,819 |         |  |  | 92,063            |  |  |         | 246,385 |  |                   |  | 276,720 |               |  |  | 7,095    |   |  |  | 1,261,082 | 
|                                            |  |                             |         |  |                   |  |         |         |  |  |                   |  |  |         |         |  |                   |  |         |               |  |  |          |   |  |  |           | 

The accompanying notes are an integral part of these consolidated financial statements.



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##### Table of Contents

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless otherwise indicated)



|1. | BUSINESS DESCRIPTION
|-- | --------------------

Compañía de Inversiones de Energía S.A. (CIESA or the Company) was created on December 14, 1992.

CIESA is under co-control of: (i) the Petrobras Argentina and one of its subsidiaries (together Petrobras Argentina
Group), which holds 50% of CIESAs common stock, (ii) the CIESA Trust (whose trustee is The Royal Bank of Scotland N.V. Sucursal Argentina) (the Trust), which has a trust shareholding of 40% in CIESA. The remaining 10% is
held by EPCA (a subsidiary of Pampa Energía S.A.).

The current ownership of CIESAs common stock is the result of
the first stage of the Master Settlement and Mutual Release Agreement (the Settlement Agreement), signed by Petrobras Argentina Group and Enron subsidiaries on April 16, 2004. The shareholding exchange was carried out on
August 29, 2005, after the Ente Nacional Regulador del Gas (ENARGAS) approval by Note No. 4,858 issued in July 2005. In this stage, Enron subsidiaries transferred 40% of the outstanding share capital of CIESA to the Trust; and
Petrobras Argentina Group transferred their TGS class B common shares (representing 7.35% of the outstanding share capital of Transportadora de Gas del Sur S.A. TGS or the Controlled Company) to Enron
subsidiaries.

Under the Settlement Agreement and the subsequent agreements, including the 2012 Settlement Agreement after the
transfer of 4.2962% of TGS common stock, CIESA currently holds 51% of TGS, one of the companies created as a result of the privatization of Gas del Estado S. E. (GdE) engaged in the transportation of natural gas, production and
commercialization of natural gas liquids (NGL) and other services in Argentina. TGSs pipeline system connects major gas fields in southern and western Argentina with distributors of gas in those areas and in the greater Buenos
Aires area. The gas transportation license to operate this system for a period of thirty-five years (the License) was exclusively granted to TGS, which is entitled to a one-time extension of ten years provided that it has essentially met
the obligations under the License and imposed by ENARGAS. The General Cerri Gas Processing Complex (the Cerri Complex), where TGS processes natural gas by extracting NGL, was transferred along with the gas transmission assets.



|2. | BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
|-- | --------------------------------------------------------------------

The Companys consolidated financial statements have been prepared in accordance with generally accepted accounting principles in
Argentina (Argentine GAAP) as approved by Professional Council in Economic Sciences of the Autonomous City of Buenos Aires (CPCECABA) of the Autonomous City of Buenos Aires and the regulations of the ENARGAS. Argentine GAAP
differs in certain significant respects from generally accepted accounting principles in the United States of America (US GAAP). Such differences involve methods of measuring and classifying the amounts shown in the financial statements,
as well as additional disclosures required by US GAAP and Regulation S-X of the Securities and Exchange Commission (SEC). These consolidated financial statements do not include any valuation adjustments or additional disclosures to
reflect such differences (see note 13).

The financial information and the comparative information as of and for the year
ended December 31, 2013 and 2011 have not been audited.

The consolidated financial statements include the accounts of
CIESA on its subsidiaries TGS and Telcosur S.A. (Telcosur), over which it has effective control. Investments in companies, in which the Company exercises significant influence, but not control, are accounted for under the equity method.
The Company followed the methodology established in Technical Resolution (TR) No. 21 Equity Method of Accounting, Consolidation of Financial Statements and Related Party Transactions, of the Argentine Federation of
Professional Councils in Economic Sciences (Argentine Federation) and approved by the CPCECABA. The accounting policies followed by Telcosur in the preparation of its financial information are consistent with those applied by TGS. All
significant intercompany transactions have been eliminated in consolidation.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Detailed data reflecting subsidiary direct control as of December 31, 2013, 2012 and 2011 is as
follows:



|              |  |                                      |       |  |          |  |       |        |  |  |          |  |  |        |       |  |          |  |       |              |  |               |       |  |  |             |  |                                                          
|------------- |  | ------------------------------------ | ----- |  | -------- |  | ----- | ------ |  |  | -------- |  |  | ------ | ----- |  | -------- |  | ----- | ------------ |  | ------------- | ----- |  |  | ----------- |  | ---------------------------------------------------------
|              |  | Percentage of shareholding and votes |       |  |          |  |      
|              |  | 2013                                 |       |  | 2012     |  |       | 2011   |  |  |          |  | 
|Company       |  | Direct                               |       |  | Indirect |  |       | Direct |  |  | Indirect |  |  | Direct |       |  | Indirect |  |       | Closing Date |  | Legal Address
|              |  |                                      |       |  |          |  |       |       
|TGS           |  |                                      | 51.00 |  |          |  |      |        |  |  | 51.00    |  |  |        |      |  |          |  | 55.30 |              |  |               |      |  |  | December 31 |  | Don Bosco 3672, 5thFloor, Autonomous city of Buenos Aires
|              |  |                                      |       |  |          |  |       |       
|Telcosur S.A. |  |                                      |      |  |          |  | 51.00 |        |  |  |         |  |  |        | 51.00 |  |          |  |      |              |  |               | 55.29 |  |  | December 31 |  | Don Bosco 3672, 6thFloor, Autonomous city of Buenos Aires

Financial statements of TGS and Telcosur have been used for consolidation purposes for the years ended
December 31, 2013, 2012 and 2011.



|a) | Use of estimates
|-- | ----------------

The preparation of the consolidated financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts
of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the reporting fiscal year. Estimates are used
when accounting for the allowance for doubtful accounts, depreciation, amortization, income taxes, provision for contingencies, fair value of assets and present value of long term receivables. Actual results could be significantly different from
such estimates.



|b) | Presentation of consolidated financial statements in constant Argentine pesos
|-- | -----------------------------------------------------------------------------

The consolidated financial statements have been prepared in constant Argentine pesos, recognizing the overall effects of
inflation up to August 31, 1995. As from that date, in line with professional accounting standards and the requirements of the control authorities, the Company discontinued the restatement of its financial statements until December 31,
2001.

As established by Resolution No. 3/2002 of the CPCECABA and Resolution No. 415 of the CNV, as
from January 1, 2002, the Company resumed the recognition of the effects of inflation in these consolidated financial statements, following the provisions of TR No. 6, as amended by TR No. 19, both issued by the Argentine Federation.
Accounting measurements restated due to the change in the purchasing power of the currency up to August 31, 1995, as well as those which have been originated between that date and December 31, 2001, are stated in the currency value as of
the later date.

On March 25, 2003, the Executive Branch issued Decree No. 664, which provides that
financial statements for periods ending after such date shall be stated in historical Argentine pesos. As a consequence and in accordance with Resolution No. 441, issued by the CNV, the Company suspended inflation accounting effective
March 1, 2003. This criterion is not in line with effective accounting standards, which stipulate that financial statements should be restated as of September 30, 2003. The non-recognized inflation effect on net income for the years ended
December 31, 2013, 2012 and 2011 is not significant.

The Argentine Wholesale Price Index
(WPI) published by the Instituto Nacional de Estadística y Censos (INDEC) was used for the restatement of the financial statements, as mentioned above.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|c) | Short-term receivables and liabilities in currency
|-- | --------------------------------------------------

Short-term receivables and liabilities, including accrued interest, if applicable, at the end of each year have been
valued at their respective nominal amount, which does not materially differ from the present value of the future cash flow that the receivables and liabilities will generate, using the internal rate of return estimated at inception.

An allowance for trade receivables is established when there is objective evidence that the Company will not be able to
collect all amounts due according to the original terms of the receivables. Significant financial difficulties of the debtor, probability that the debtor will enter bankruptcy or financial reorganization, and default or delinquency in payments,
including the customers credit risk, historical trends and other relevant information are considered indicators that such receivables are impaired. Such evaluation may require future adjustments if economic conditions substantially differ from
the assumptions made.

In light of the financial situation of MetroGAS S.A. (MetroGAS), as of
December 31, 2012, its trade receivables were valued at their present value based on an estimated cash flow discounted at a market interest rate. As of December 31, 2013, all amounts due from MetroGAS were collected. For further
information, see Note 9.c).

Tax credits (income tax and value added tax -VAT) recorded as a result
of the reversion of the tariff increase (Note 7.a) have been valued at the discounted value of the amounts expected to be collected using a market interest rate.



|d) | Foreign currency assets and liabilities
|-- | ---------------------------------------

Assets and liabilities denominated in foreign currencies, including accrued interest, if applicable, have been translated
at the prevailing exchange rates at the end of each year. Detailed information is disclosed in Exhibit G.



|e) | Inventories
|-- | -----------

Inventories consist of natural gas of TGS (in excess of the Line Pack classified as property, plant and equipment) in the pipeline system, and the liquids obtained from natural gas processing
at the Cerri Complex.

Due to the fact that the inventories have a high turnover, they have been valued at
monthly average cost which does not differ significantly from the replacement cost or reproduction cost, as applicable. The carrying value of inventories does not exceed their net realizable value.

The assessment of the recoverable value of these assets is made at each reporting date, and the resulting loss is
recognized in the statement of comprehensive income when the inventories are overstated.



|f) | Current investments
|-- | -------------------

Bank accounts, time deposits and loans have been valued at their face values plus accrued interest, which do not materially differ from their discounted value using the internal rate of return effective
at inception.

Mutual funds and public bonds have been valued at their net realizable value at year-end.

Loans balance in Current Investments as of December 31, 2012 and 2011 is comprised of a loan granted by
TGS to Pampa Energía. For further information see Note 10.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|g) | Long-term receivables and liabilities
|-- | -------------------------------------

Long-term receivables and liabilities which accrued interests have been valued based on the best estimate of the
discounted value of the amounts expected to be collected or paid, as applicable, using the interest rate effective at the time of the initial measurement.

Assets and liabilities generated as a result of the application of the deferred tax method have been stated at their nominal value.



|h) | Non-current investments
|-- | -----------------------

Equity investments in companies in which the Companys ownership interest ranges between 20% and 50% have been accounted for under the equity method based on the financial statements as of
September 30, 2013, 2012 and 2011 for Gas Link S.A. (Link), Transporte y Servicios de Gas en Uruguay S.A. (TGU) and Emprendimientos de Gas del Sur S.A. (EGS). These financial statements have been prepared
applying similar accounting policies as those used by the Company to prepare its consolidated financial statements. As of December 31, 2013, 2012 and 2011, the investment in Link has been adjusted by Ps. 3,500, Ps. 3,642 and Ps. 3,783
respectively, due to the elimination of intercompany profits.

The Companys management is not aware of
any significant subsequent events which affected: (i) the financial statements as of September 30, 2013 of Link, TGU and EGS, from this date to December 31, 2013; (ii) the financial statements as of September 30, 2012 of
Link, TGU and EGS, from this date to December 31, 2012; and, (iii) the financial statements as of September 30, 2011 of Link, TGU and EGS, from this date to December 31, 2011.

The Company considers its foreign affiliate TGU to be a non-integrated affiliate. Consequently, TGUs
assets and liabilities have been translated into Argentine pesos using the exchange rate in effect at year-end, while its common stock and retained earnings accounts have been translated using historical exchange rates.

However, CNV Resolution No. 398 provides, under certain circumstances, for the application of CPCECABA Resolution MD
No.3/02 and No. 87/03 which provide that foreign currency losses arising from the devaluation of the peso from January 6, 2002 to July 28, 2003, related to liabilities in foreign currency as of such date, directly associated with the
funds obtained to adquired TGS ownership, must be allocated to the cost of this assets. The foreign exchange capitalized is amortized in 26 years which corresponds to the years between January 6, 2002 and the finalizarion of TGS License.
The amortization is allocated in Gain / (Loss) on related companies



|i) | Property, plant and equipment, net
|-- | ----------------------------------



| |  |  | Assets transferred from the privatization of GdE: The value of these assets was determined based on the price paid for the acquisition of 70% of the
Companys common stock, which amounted to US$ 561.2 million. This price was the basis to determine a total value of common stock of US$ 801.7 million, which, when added to the debt assumed under the Companys privatization agreement
(the Transfer Agreement) of US$ 395.0 million, resulted in a total value for property, plant and equipment of US$ 1,196.7 million. Such value, converted at the exchange rate in effect as of the date of the Transfer Agreement, has
been restated for the effects of inflation as described in Note 2.b).
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Line pack: It represents the natural gas in the transportation system that is necessary to keep the system at operating capacity, valued at
acquisition cost and restated for the effects of inflation as described in Note 2.b).
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



| |  |  | Capitalization of foreign exchange loss: Resolutions No. 3/2002 and No. 87/03 issued by the CPCECABA established that exchange losses
arising from the devaluation of the peso from January 6, 2002 to July 28, 2003, to the extent that they were related to foreign currency liabilities existing at the first date, may be added to the cost basis of assets acquired or
constructed with direct financing by such foreign currency liabilities. Similar accounting treatment is permitted, but not required, for foreign exchange losses arising from indirect financing. It was assumed that the proceeds from such financings
were used, firstly, to cover working capital requirements and, secondly, to finance the acquisition or construction of assets that do not qualify for capitalization. The remainder was assumed to relate to assets for which capitalization is
permitted.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Additions: They have been valued at acquisition cost restated for the effects of inflation as described in Note 2.b). The Controlled Company has
capitalized all the investments stipulated as mandatory in the License during the first five-year period, in order to achieve system integrity and public safety equal to those required by international standards. Such investments included, among
others, the costs of survey programs related to internal and external pipeline inspection, cathodic protection and pipeline replacement and recoating. Additionally, Resolutions No. 1,660 and No. 1,903 issued by ENARGAS include definitions
prescribing which costs should be considered improvements and which costs should be considered maintenance expenses. Repair and maintenance costs have been expensed as incurred.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Depreciation: Accumulated depreciation related to natural gas transportation assets is computed under the straight-line method over the estimated
useful lives of the specific assets, which are lower than the maximum useful lives established by ENARGAS through Resolutions No. 1,660 and No. 1,903.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

For depreciation of all other property, plant and equipment, the Controlled Company uses the straight-line method of
depreciation and applies the annual depreciation rates disclosed in Exhibit A.

When assets are retired or
otherwise disposed of, the cost and related accumulated depreciation are removed from the accounts, and any resulting gain or loss is reflected in the statement of income.

Capitalized foreign exchange loss is depreciated over the remaining useful lives of the assets that led to such
capitalization.



| |  |  | Financial expense capitalization: TGS capitalizes financial expense on long term construction projects. Financial expense capitalized was Ps. 7,245,
Ps. 16,056 and Ps. 18,200 for the years ended December 31, 2013, 2012 and 2011, respectively.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

TGS periodically evaluates the carrying value of these assets for impairment, by comparing the carrying value of the assets with its fair value which is calculated based on the projected cash flow
discounted at a rate commensurate with the risk involved. If the carrying value of the assets is higher than its fair value, a loss would be recognized based on the amount by which the carrying value exceeds fair value.

Based on the estimates made as discussed in Note 2.a) and relying on assumptions about the outcome of the tariff
renegotiation process, the effects of inflation, and changes in the U.S. dollar exchange rate, the TGSs management believes that the recorded value of property, plant and equipment does not exceed its fair value. However, it is reasonably
possible that the TGSs conclusion that these assets are not impaired could change should the assumptions develop differently than expected by management.



|j) | Other non-current investments
|-- | -----------------------------

Consist on the balance of the loan granted to Pampa Energía. It was initially measured at fair value and have been valued based on the best estimate of the discounted value of the amounts expected
to be collected using the interest rate effective at the time of the initial measurement.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Private bonds received as a consequence of the conclution of the
MetroGAS bankrupcy proccess were measured at fair value (See note 9.c).



|k) | Derivative Financial Instruments
|-- | --------------------------------

Derivative financial instruments are recognized at their fair value at inception and subsequently measured at their fair value and disclosed as assets or liabilities depending if it is gain or loss. The
results of derivative financial instruments are classified under Net Financial Results in the statement of comprehensive income.

The Company manages exposures to foreign exchange risks using hedging instruments that provide the appropriate economic outcome. The hedging instruments used include currency forward contracts. The
Company does not use derivative financial instruments for speculative purposes.

As of December 31, 2013,
the Company entered into currency forward agreements with major financial institutions for the purchase of U.S. dollars, which are disclosed under other current receivables in the statement of financial position. The gain for the fiscal
year 2013 is recognized in the statement of comprehensive income within derivative financial instruments result in the line financial expenses.

The method of recognizing the resulting gain or loss depends on whether the derivative is designated as a hedging
instrument or not and, according to the nature of the item being hedged. As of the date of the issuance of these financial statements, the Company has not applied hedge accounting in any of its outstanding derivative financial instruments.



|l) | Income tax
|-- | ----------

The Company and its subsidiary have calculated their respective income tax charges using the deferred tax method, which considers the effect of temporary differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax bases.

To estimate deferred tax
assets and liabilities, the tax rate expected to be in effect at the time of utilization was applied to identify temporary differences based on the legal requirements effective at the date of preparation of these consolidated financial statements.

The reconciliation between the current tax an the income tax expense charged to the statement of income in the
years ended December 31, 2013, 2012 and 2011 is as follows:



|                                              |  |               |         |   |      |  |          |               |  |  |          |  
|--------------------------------------------- |  | ------------- | ------- | - | ---- |  | -------- | ------------- |  |  | -------- | -
|                                              |  | 2013          |         |   | 2012 |  |          | 2011          | 
|                                              |  | (non-audited) |         |   |      |  |          | (non-audited) | 
|Current tax                                   |  |               | (95,493 | ) |      |  | (231,604 | )             |  |  | (149,279 | )
|Temporary differences variation               |  |               | 698     |   |      |  | 13,410   |               |  |  | (9,621   | )
|Tax loss carryforwards                        |  |               | 12,222  |   |      |  | (234,284 | )             |  |  | 19,202   |  
|Allowance for deferred tax assets (Exhibit E) |  |               | (10,675 | ) |      |  |         |               |  |  | 213,421  |  
|                                              |  |               |         |   |      |  |          |               |  |  |          |  
|Income tax expense                            |  |               | (93,248 | ) |      |  | (452,478 | )             |  |  | 73,723   |  
|                                              |  |               |         |   |      |  |          |               |  |  |          |  



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



The components of the net deferred tax assets and liabilities as of
December 31, 2013, 2012 and 2011 are the following:



|                                                   |  |               |         |   |      |  |         |               |  |  |         |  
|-------------------------------------------------- |  | ------------- | ------- | - | ---- |  | ------- | ------------- |  |  | ------- | -
|Non-current deferred tax assets and liabilities    |  | 2013          |         |   | 2012 |  |         | 2011          | 
|                                                   |  | (non-audited) |         |   |      |  |         | (non-audited) | 
|Allowance for doubtful accounts                    |  |               | 1,218   |   |      |  | 1,219   |               |  |  | 1,175   |  
|Deferred revenues                                  |  |               | (95     | ) |      |  | (237    | )             |  |  | (356    | )
|Tax credits discounted value loss                  |  |               |        |   |      |  | 10,950  |               |  |  | 3,347   |  
|Account receivables discounted value               |  |               | 12,028  |   |      |  | 3,568   |               |  |  |        |  
|Intangible assets                                  |  |               | (546    | ) |      |  | (872    | )             |  |  | (1,197  | )
|Property, plant and equipment, net                 |  |               | (93,745 | ) |      |  | (95,135 | )             |  |  | (91,783 | )
|Other provisions                                   |  |               | 3,946   |   |      |  | 3,946   |               |  |  | 2,343   |  
|Provision for contingencies                        |  |               | 51,679  |   |      |  | 49,371  |               |  |  | 46,406  |  
|Current investments                                |  |               | (1,842  | ) |      |  | (111    | )             |  |  | (9      | )
|Present value loans                                |  |               | (2,510  | ) |      |  | (3,264  | )             |  |  | (3,902  | )
|Income tax loss carryforward                       |  |               | 10,675  |   |      |  |        |               |  |  | 233,276 |  
|Allowance for deferred tax assets (Exhibit E)      |  |               | (10,675 | ) |      |  |        |               |  |  |        |  
|                                                   |  |               |         |   |      |  |         |               |  |  |         |  
|Net deferred tax liability(Notes 4.d. and 4.i.)(1) |  |               | (29,867 | ) |      |  | (30,565 | )             |  |  | 189,300 |  
|                                                   |  |               |         |   |      |  |         |               |  |  |         |  



| | (1) | Net of deferred tax asset of Ps. 69, Ps. 67 and Ps. 229,498 recorded under Other non-current receivables as of December 31, 2013, 2012 and 2011
respectively.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------

Income tax expense computed at the statutory tax rate on pre-tax income
differs from the income tax expense for the years ended December 31, 2013, 2012 and 2011 as follows:



|                                                    |  |               |         |   |      |  |           |               |  |  |         |  
|--------------------------------------------------- |  | ------------- | ------- | - | ---- |  | --------- | ------------- |  |  | ------- | -
|                                                    |  | 2013          |         |   | 2012 |  |           | 2011          | 
|                                                    |  | (non-audited) |         |   |      |  |           | (non-audited) | 
|Pre-tax income                                      |  |               | 138,484 |   |      |  | 1,123,227 |               |  |  | 213,800 |  
|Statutory income tax rate                           |  |               | 35      | % |      |  | 35        | %             |  |  | 35      | %
|Pre-tax income at statutory income tax rate         |  |               | (48,469 | ) |      |  | (393,129  | )             |  |  | (74,830 | )
|Permanent differences at statutory income tax rate: |  |               |         |   |      |  |           |               |  |  |         |  
|- Inflation adjustment                              |  |               | (29,668 | ) |      |  | (30,505   | )             |  |  | (29,957 | )
|- Variation in deferred tax assets allowance        |  |               | (10,675 | ) |      |  |          |               |  |  | 213,421 |  
|- Tax loss carryforwards                            |  |               |        |   |      |  |          |               |  |  | (31,681 | )
|- Non-taxable income or non-deductible expenses     |  |               | (174    | ) |      |  | (28,024   | )             |  |  | 717     |  
|- Others                                            |  |               | (4,262  | ) |      |  | (820      | )             |  |  | (3,947  | )
|                                                    |  |               |         |   |      |  |           |               |  |  |         |  
|Income tax expense                                  |  |               | (93,248 | ) |      |  | (452,478  | )             |  |  | 73,723  |  
|                                                    |  |               |         |   |      |  |           |               |  |  |         |  

Within the framework of Resolution No. 312/05 from the FACPCE, the net book value of
the inflation adjustment included in the accounting value of the property, plant and equipment is a temporary difference and thus, the deferred tax liability is required to be recorded. However, said resolution permits companies to disclose the
deferred tax liability in the notes to the financial statements instead of recording it. TGS had elected to disclose the deferred tax liability in notes to the consolidated financial statements. This deferred tax liability does not constitute an
account payable, but it is a liability that will be reversed over the remaining period over which these assets are depreciated. On October 24, 2011 the CNV issued Resolution No. 592 which extends Resolution No. 576 and 562 and, among
other things, establishes that the recognition of the deferred tax liability caused by the inflation adjustment included in the accounting value of property, plant and equipment must be recorded with a debit to Accumulated Retained Earnings in any
interim period or fiscal year-end until the end of the year immediately preceding the first interim period in which the IFRS will be applied. TGS recognized this tax liability during the year 2011. However, CIESA has not exercised the above mention
option, thus it did not recognized this tax liability in its consolidated financial statements. In compliance with Resolution No. 487 of the CNV, CIESA advises that, if that liability had been recognized, the deferred tax liability as of
December 31, 2013, would have increased by Ps. 504,077 (generating a net liability position of Ps. 534,013) and a positive effect of Ps. 15,131, Ps. 15,557 and Ps.16,565 on the Companys net income for the years ended December 31,
2013, 2012 and 2011, respectively, would have been recognized. Additionally, in the subsequent years, TGS would have recorded a lower income tax expenses as follows:



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|                  |  |        |         | 
|----------------- |  | ------ | ------- | 
|                  |  | Amount |        
|Year 2013         |  |        | 14,798  | 
|Year 2014         |  |        | 14,749  | 
|Year 2015         |  |        | 12,047  | 
|Year 2016 onwards |  |        | 215,485 | 
|                  |  |        |         | 
|Total             |  |        | 257,079 | 
|                  |  |        |         | 

CIESAs accumulated tax loss carryforwards that are available to offset future
taxable income are the following:



|                                  |  |        |        |  |                    |  |      | 
|--------------------------------- |  | ------ | ------ |  | ------------------ |  | ---- | 
|Description                       |  | Amount |        |  | Year of expiration | 
|Tax loss carryforward 2013        |  |        | 30,500 |  |                    |  | 2018 | 
|                                  |  |        |        |  |                    |  |      | 
|Accumulated tax loss carryforward |  |        | 30,500 |  |                    |  |      | 
|                                  |  |        |        |  |                    |  |      | 

The ultimate realization of deferred tax assets is dependent upon the generation of future
taxable income during the years in which those temporary differences become recoverable. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning in making these assessments. This
evaluation is based on internal projections made as discussed in Note 2.a). Based on current financial information, the Company is uncertain that it will recover its entire deferred tax assets through future taxable income. Accordingly, as of
December 31, 2013, the Company has recognized a valuation allowance of Ps. 10,675 against its deferred tax assets, respectively.



|m) | Asset tax
|-- | ---------

The Company and its subsidiary are subject to the Asset Tax Law (Impuesto a la Ganancia Mínima Presunta). The asset tax is calculated on an individual entity basis at the
statutory tax rate of 1%, and is based upon the taxable assets of each Argentine entity as of the end of the year. This tax is complementary to income tax and the Company is required to pay the greater of the income tax or the asset tax. Any excess
of the asset tax over the income tax may be carried forward and recognized as a payment on account of any excess of income tax over asset tax occurring within the subsequent ten years.

Finally, regarding the asset tax for the fiscal year 2011, the Company estimated that it was equal zero. To perform this
estimation, the significant tax loss carryforward and the decisions taken by the Supreme Court of Justice under the judicial decree Hermitage on June 15, 2010, lately ratified by the judicial decree issued on June 7, 2011
(Tren de la Costa SA c/Estado Nacional), were taken under consideration. In both judicial decrees, the Supreme Court declared the unconstitutional nature of the asset tax, because of under specific circunstancies, which are entirely
applible to CIESA, the asset tax is confiscatory.

As of December 31, 2013, 2012 and 2011, the Company has
not recorded any provision in respect of the asset tax because the determined amounts do not exceed what has been estimated for the income tax.



|n) | Advances from customers
|-- | -----------------------

Mainly consist of pre-payments for the transportation of natural gas services made by customers in order to finance pipeline expansion works. Advances from customers are recognized initially at their fair
value. Subsequent to initial recognition, advances from customers are measured at their amortized cost which is higher than the cost of rendering the gas transportation services that will cancel said advances.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|o) | Allowances and provisions for contingencies
|-- | -------------------------------------------

The Company provides for losses relating to its accounts receivable. The allowance for losses is based on
managements evaluation of various factors, including the credit risk of customers, historical trends and other information. While management uses the information available to make evaluations, future adjustments to the allowance may be
necessary if future economic conditions differ substantially from the assumptions used in making the evaluations. Management has considered all events and/or transactions that are subject to reasonable and normal methods of estimation, and the
consolidated financial statements reflect that consideration.

The Company has certain contingent liabilities
with respect to existing court or out-of-court claims, lawsuits and other proceedings, including those involving legal and regulatory matters. The Company records liabilities when it is probable that future costs will be incurred and such costs can
be reasonably estimated. Such accruals are based on developments known by TGS at the date of the issuance of these consolidated financial statements, estimates of the outcome of these matters and the experience of its legal counsel in contesting,
litigating and settling other matters. As the scope of the contingent liabilities become better defined, there will be changes in the estimates of future costs, which could have a material effect on the Companys future results of operations
and financial condition or liquidity.

Contingencies and allowances are disclosed in Exhibit E.



|p) | Shareholders equity accounts
|-- | -----------------------------

These accounts have been restated to account for the effects of inflation as described in Note 2.b), except for Common stock which is stated at nominal value. The adjustment derived from the
restatement of such account has been disclosed under the line item Inflation adjustment to common stock, in the Consolidated Statement of Changes in Shareholders Equity.



|q) | Revenue recognition
|-- | -------------------

Revenue is measured at the fair value of the consideration received or receivable, and represents amounts receivable for goods and/or services supplied. The Company recognizes revenue when the amount of
revenue can be reliably measured; when it is probable that future economic benefits will flow to the entity; and when specific criteria have been met for each of the Companys activities, as described below.

Tax on exports and turnover tax are disclosed as Selling Expenses.

Natural Gas transportation services includes: (i) firm natural gas transportation, whose revenues are recognized when
the capacity is reserved and paid for regardless of actual usage by the customer and (ii) interruptible natural gas transportation whose revenues are recognized at the inception of the rendering of the service.

Liquids Production and Commercialization services includes: (i) Liquids production and commercialization for its own
account and on behalf on third parties, whose revenues are recognized at the time of the delivery of the liquids to the customers, and (ii) Other Liquids services, which corresponds mainly to the receipt, storage and dispatch from facilities
located in Puerto Galván, and whose sales revenues are recognized when the service is provided.

Services from Other Services segment primarily consist of the treatment, removal of impurities and natural gas
compression, as well as inspection and maintenance of pipelines and compressor plants and services of steam generation for electricity production. Also, this business segment includes revenues from telecommunications services provided through
Telcosur. Revenues in this segment are recognized when the service is provided.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|r) | Statement of income accounts
|-- | ----------------------------

Accounts relating to the statement of income have been recorded considering the following criteria:



| |  |  | Accounts that accumulate monetary transactions, at their nominal value.
| | - |  | -----------------------------------------------------------------------



| |  |  | Expenses related to consumption of non-monetary assets have been charged to the statement of income considering the restated cost of such assets as
described in Note 2.b).
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Gain on related companies was determined on the basis of TGS affiliates results and were disclosed under Gain on related
companies.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------

Other expenses, net for the years ended December 31, 2013, 2012 and
2011 include the following items:



|                                                                                |  |               |        |   |      |  |         |               |  |  |         |  
|------------------------------------------------------------------------------- |  | ------------- | ------ | - | ---- |  | ------- | ------------- |  |  | ------- | -
|                                                                                |  | 2013          |        |   | 2012 |  |         | 2011          | 
|                                                                                |  | (non-audited) |        |   |      |  |         | (non-audited) | 
|Net decrease and doubtfull accounts in provisions for contingencies (Exhibit E) |  |               | 16,916 |   |      |  | (13,374 | )             |  |  | (24,395 | )
|Revenues from liquids contract termination agreement                            |  |               |       |   |      |  |        |               |  |  | 16,044  |  
|Others                                                                          |  |               | (4,862 | ) |      |  | 2,764   |               |  |  | 2,665   |  
|                                                                                |  |               |        |   |      |  |         |               |  |  |         |  
|Total                                                                           |  |               | 12,054 |   |      |  | (10,610 | )             |  |  | (5,686  | )
|                                                                                |  |               |        |   |      |  |         |               |  |  |         |  



|s) | Earnings per share
|-- | ------------------

Earnings and dividends per share for the years ended December 31, 2013, 2012 and 2011 have been calculated based on 638,818,696 outstanding shares during each year. As the Company does not have
preferred stock or convertible debt, the amount of basic earnings per share is the same as the amount of diluted earnings per share.



|3. | CONSOLIDATED BUSINESS SEGMENT INFORMATION
|-- | -----------------------------------------

TGSs business segments are as follows: (i) natural gas transportation services through its pipeline system; (ii) production and commercialization of liquids and (iii) other services,
which include midstream and telecommunication services (the latter rendered by its subsidiary, Telcosur).

Operating income
consists of net revenues minus operating expenses. In the calculation of operating income, the following items have not been included: other expenses, net, gain on related companies, net financial results and income tax expense.

Assets and liabilities were allocated to each segment based on the specific identification of the assets and liabilities related to the
specific business. Assets and liabilities that cannot be allocated to a specific segment were grouped under Corporate and include current investments and loans, among others.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|                                              |  |                           |           |  |                                           |  |           |               |  |  |           |  |  |       |           |   |  |  |           | 
|--------------------------------------------- |  | ------------------------- | --------- |  | ----------------------------------------- |  | --------- | ------------- |  |  | --------- |  |  | ----- | --------- | - |  |  | --------- | 
|Year ended December 31, 2013(non-audited)     |  | Natural GasTransportation |           |  | Production andCommercializationof Liquids |  |           | OtherServices |  |  | Corporate |  |  | Total |          
|Net revenues                                  |  |                           | 661,023   |  |                                           |  | 2,065,321 |               |  |  | 138,642   |  |  |       |          |   |  |  | 2,864,986 | 
|Operating income / (loss)                     |  |                           | 14,883    |  |                                           |  | 649,030   |               |  |  | 30,665    |  |  |       | (2,399    | ) |  |  | 692,179   | 
|Depreciation of property, plant and equipment |  |                           | 179,646   |  |                                           |  | 47,039    |               |  |  | 16,232    |  |  |       |          |   |  |  | 242,917   | 
|Identifiable assets                           |  |                           | 4,974,062 |  |                                           |  | 783,159   |               |  |  | 315,689   |  |  |       | 139,248   |   |  |  | 6,212,158 | 
|Identifiable liabilities                      |  |                           | 3,410,823 |  |                                           |  | 470,740   |               |  |  | 168,265   |  |  |       | (341,395  | ) |  |  | 3,708,433 | 
|Year ended December 31, 2012                  |  |                           |           |  |                                           |  |           |               |  |  |           | 
|Net revenues                                  |  |                           | 603,355   |  |                                           |  | 1,835,738 |               |  |  | 135,875   |  |  |       |          |   |  |  | 2,574,968 | 
|Operating income / (loss)                     |  |                           | 109,589   |  |                                           |  | 683,086   |               |  |  | 30,807    |  |  |       | (118,828  | ) |  |  | 704,654   | 
|Depreciation of property, plant and equipment |  |                           | 163,293   |  |                                           |  | 44,918    |               |  |  | 15,414    |  |  |       | 10,045    |   |  |  | 233,670   | 
|Identifiable assets                           |  |                           | 3,691,180 |  |                                           |  | 678,749   |               |  |  | 287,450   |  |  |       | 949,319   |   |  |  | 5,606,698 | 
|Identifiable liabilities                      |  |                           | 486,855   |  |                                           |  | 179,892   |               |  |  | 17,040    |  |  |       | 2,406,460 |   |  |  | 3,090,247 | 
|Year ended December 31, 2011 (non-audited)    |  |                           |           |  |                                           |  |           |               |  |  |           | 
|Net revenues                                  |  |                           | 575,639   |  |                                           |  | 1,179,174 |               |  |  | 99,062    |  |  |       |          |   |  |  | 1,853,875 | 
|Operating income / (loss)                     |  |                           | 150,480   |  |                                           |  | 507,848   |               |  |  | 4,367     |  |  |       | (111,059  | ) |  |  | 551,636   | 
|Depreciation of property, plant and equipment |  |                           | 159,371   |  |                                           |  | 41,522    |               |  |  | 12,856    |  |  |       | 6,639     |   |  |  | 220,388   | 
|Identifiable assets                           |  |                           | 3,621,981 |  |                                           |  | 617,823   |               |  |  | 253,070   |  |  |       | 1,367,667 |   |  |  | 5,860,541 | 
|Identifiable liabilities                      |  |                           | 445,697   |  |                                           |  | 162,762   |               |  |  | 13,325    |  |  |       | 3,431,391 |   |  |  | 4,053,175 | 

The Company renders services of natural gas transportation principally to gas distribution companies and
Petrobras Argentina. Significant customers in terms of net revenues from gas transportation for the years ended December 31, 2013, 2012 and 2011 are as follows:



|                             |  |               |         |  |      |  |         |               |  |  |         | 
|---------------------------- |  | ------------- | ------- |  | ---- |  | ------- | ------------- |  |  | ------- | 
|                             |  | 2013          |         |  | 2012 |  |         | 2011          | 
|                             |  | (non-audited) |         |  |      |  |         | (non-audited) | 
|MetroGAS S.A. (MetroGAS)   |  |               | 183,724 |  |      |  | 184,288 |               |  |  | 182,503 | 
|Camuzzi Gas Pampeana S.A.    |  |               | 99,601  |  |      |  | 98,062  |               |  |  | 96,877  | 
|Gas Natural BAN S.A. (BAN) |  |               | 70,614  |  |      |  | 70,487  |               |  |  | 70,102  | 
|Petrobras Argentina          |  |               | 31,698  |  |      |  | 32,360  |               |  |  | 32,801  | 
|Camuzzi Gas del Sur S.A.     |  |               | 23,934  |  |      |  | 24,388  |               |  |  | 23,827  | 

Significant customers in the Production and Commercialization of Liquids segment are Petredec Limited
(Petredec), Petrobras Global Trading BV (Petrobras Global), PBB-Polisur S.A. (Polisur) and Petroleo Brasileiro. Net revenues from these customers (include sales of liquids made on behalf of third parties, from
which TGS withholds charges for the Production and Commercialization of Liquids) for the years ended December 31, 2013, 2012 and 2011 are as follows:



|                                                 |  |               |         |  |      |  |         |               |  |  |         | 
|------------------------------------------------ |  | ------------- | ------- |  | ---- |  | ------- | ------------- |  |  | ------- | 
|                                                 |  | 2013          |         |  | 2012 |  |         | 2011          | 
|                                                 |  | (non-audited) |         |  |      |  |         | (non-audited) | 
|Petrobras International Finance Company (PIFC) |  |               |        |  |      |  |        |               |  |  | 9,332   | 
|Polisur                                          |  |               | 785,380 |  |      |  | 580,325 |               |  |  | 367,059 | 
|Petredec                                         |  |               | 411,127 |  |      |  | 342,757 |               |  |  | 567,734 | 
|Trafigura Beheer B.V. Amsterdam (Trafigura)    |  |               |        |  |      |  | 34,831  |               |  |  | 186,016 | 
|Petroleo Brasileiro                              |  |               | 343,150 |  |      |  | 256,447 |               |  |  | 195,094 | 
|Petrobras Global                                 |  |               | 373,791 |  |      |  | 487,314 |               |  |  |        | 



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|4. | SUMMARY OF SIGNIFICANT BALANCE SHEET ITEMS AS OF DECEMBER 31, 2013, 2012 AND 2011
|-- | ---------------------------------------------------------------------------------



|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|------------------------------------------- |  | ------------- | ------- | - | ---- |  | ------- | ------------- |  |  | ------- | -
|                                            |  | 2013          |         |   | 2012 |  |         | 2011          | 
|                                            |  | (non-audited) |         |   |      |  |         | (non-audited) | 
|a) Current accounts receivable, net         |  |               |         |   |      |  |         |              
|Natural gas transportation                  |  |               |         |   |      |  |         |              
|Common                                      |  |               | 79,129  |   |      |  | 135,488 |               |  |  | 90,843  |  
|Related parties (Note 10)                   |  |               | 3,335   |   |      |  | 7,490   |               |  |  | 5,420   |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Subtotal                                    |  |               | 82,464  |   |      |  | 142,978 |               |  |  | 96,263  |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Production and commercialization of liquids |  |               |         |   |      |  |         |              
|Common                                      |  |               | 241,900 |   |      |  | 99,932  |               |  |  | 165,346 |  
|Related parties (Note 10)                   |  |               | 44,930  |   |      |  | 140,658 |               |  |  | 41,863  |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Subtotal                                    |  |               | 286,830 |   |      |  | 240,590 |               |  |  | 207,209 |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Other services                              |  |               |         |  
|Common                                      |  |               | 43,584  |   |      |  | 42,004  |               |  |  | 30,303  |  
|Related parties (Note 10)                   |  |               | 9,826   |   |      |  | 27,633  |               |  |  | 10,609  |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Subtotal                                    |  |               | 53,410  |   |      |  | 69,637  |               |  |  | 40,912  |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Allowance for doubtful accounts             |  |               | (4,121  | ) |      |  | (4,124  | )             |  |  | (3,997  | )
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Total                                       |  |               | 418,583 |   |      |  | 449,081 |               |  |  | 340,387 |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|b) Other current receivables                |  |               |         |  
|Tax credits                                 |  |               | 29,111  |   |      |  | 54,159  |               |  |  | 488     |  
|Prepaid expenses                            |  |               | 13,650  |   |      |  | 11,217  |               |  |  | 8,992   |  
|Advances to suppliers                       |  |               | 59,503  |   |      |  | 25,045  |               |  |  | 31,898  |  
|Subsidies receivable                        |  |               | 32,939  |   |      |  | 21,560  |               |  |  | 19,599  |  
|Derivative financial instruments            |  |               | 26,500  |   |      |  |        |               |  |  |        |  
|Tax to be recovered                         |  |               |        |   |      |  |        |               |  |  | 1,276   |  
|Others                                      |  |               | 30,490  |   |      |  | 13,417  |               |  |  | 9,493   |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Total                                       |  |               | 192,193 |   |      |  | 125,398 |               |  |  | 71,746  |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|c) Non-current accounts receivable          |  |               |         |  
|MetroGAS(1)                                 |  |               |        |   |      |  | 27,176  |               |  |  | 27,176  |  
|Gas trust fund                              |  |               | 38,136  |   |      |  | 45,580  |               |  |  | 45,946  |  
|Profertil S.A. (Profertil)                |  |               |        |   |      |  | 2,477   |               |  |  | 6,165   |  
|Allowance for doubtful accounts(1)          |  |               |        |   |      |  | (27,176 | )             |  |  | (27,176 | )
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Total                                       |  |               | 38,136  |   |      |  | 48,057  |               |  |  | 52,111  |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|d) Other non-current receivables            |  |               |         |   |      |  |         |               |  |  |         |  
|Deferred income tax (Note 2.b)              |  |               | 69      |   |      |  | 67      |               |  |  | 229,498 |  
|Easement expense to be recovered            |  |               | 3,690   |   |      |  | 5,658   |               |  |  | 4,536   |  
|Assets tax                                  |  |               |        |   |      |  |        |               |  |  | 5,668   |  
|Tax credits(2)                              |  |               | 40,013  |   |      |  | 41,163  |               |  |  | 63,239  |  
|Others                                      |  |               | 4,126   |   |      |  | 3,987   |               |  |  | 4,671   |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Total                                       |  |               | 47,898  |   |      |  | 50,875  |               |  |  | 307,612 |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|e) Accounts payable                         |  |               |         |   |      |  |         |               |  |  |         |  
|Suppliers                                   |  |               | 310,001 |   |      |  | 308,299 |               |  |  | 242,262 |  
|Customers (credit balances)                 |  |               | 48,032  |   |      |  | 36,550  |               |  |  | 26,693  |  
|Related companies                           |  |               | 27,386  |   |      |  | 18,907  |               |  |  | 27,756  |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  
|Total                                       |  |               | 385,419 |   |      |  | 363,756 |               |  |  | 296,711 |  
|                                            |  |               |         |   |      |  |         |               |  |  |         |  



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|--------------------------------------------------------------------------- |  | ------------- | ------- |  | ---- |  | ------- | ------------- |  |  | ------- | 
|                                                                            |  | 2013          |         |  | 2012 |  |         | 2011          | 
|                                                                            |  | (non-audited) |         |  |      |  |         | (non-audited) | 
|f) Current taxes payable                                                    |  |               |         |  |      |  |         |               |  |  |         | 
|Income tax (net of advances and others)                                     |  |               | 27,876  |  |      |  | 88,526  |               |  |  | 22,124  | 
|Assets tax (net of advances and others)                                     |  |               |        |  |      |  |        |               |  |  | 5,559   | 
|VAT                                                                         |  |               |        |  |      |  |        |               |  |  | 2,579   | 
|Tax on exports                                                              |  |               | 34,539  |  |      |  | 36,884  |               |  |  | 18,080  | 
|Others                                                                      |  |               | 13,946  |  |      |  | 8,101   |               |  |  | 6,461   | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|Total                                                                       |  |               | 76,361  |  |      |  | 133,511 |               |  |  | 54,803  | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|g) Current advances from customers (3)                                      |  |               |         |  |      |  |         |               |  |  |         | 
|Aluar Aluminio Argentino S.A.C.I. (Aluar)                                 |  |               | 6,742   |  |      |  | 6,742   |               |  |  | 6,742   | 
|Gas Trust                                                                   |  |               | 5,852   |  |      |  | 6,578   |               |  |  | 10,143  | 
|Total Austral S.A. (Total Austral)                                        |  |               | 4,770   |  |      |  | 4,770   |               |  |  | 4,770   | 
|Pan American Sur S.R.L. (PAS)                                             |  |               | 3,180   |  |      |  | 3,180   |               |  |  | 3,180   | 
|Others                                                                      |  |               | 4,800   |  |      |  | 3,369   |               |  |  | 4,373   | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|Total                                                                       |  |               | 25,344  |  |      |  | 24,639  |               |  |  | 29,208  | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|h) Other liabilities                                                        |  |               |         |  |      |  |         |               |  |  |         | 
|Provisions for GdE lawsuit                                                  |  |               |        |  |      |  |        |               |  |  | 4,541   | 
|Other provisions                                                            |  |               | 1,644   |  |      |  | 1,632   |               |  |  | 403     | 
|Negative investement                                                        |  |               | 801     |  |      |  |        |               |  |  |        | 
|Provision for compensation for Board of Directors and Supervisory Committee |  |               | 1,077   |  |      |  | 863     |               |  |  | 800     | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|Total                                                                       |  |               | 3,522   |  |      |  | 2,495   |               |  |  | 5,744   | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|i) Non-current taxes payable                                                |  |               |         |  |      |  |         |               |  |  |         | 
|Deferred income tax (Note 2.b)                                              |  |               | 29,936  |  |      |  | 30,632  |               |  |  | 40,198  | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|Total                                                                       |  |               | 29,936  |  |      |  | 30,632  |               |  |  | 40,198  | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|j) Non-current advances from customers (3)                                  |  |               |         |  |      |  |         |               |  |  |         | 
|Aluar                                                                       |  |               | 165,206 |  |      |  | 171,948 |               |  |  | 178,690 | 
|Total Austral                                                               |  |               | 10,335  |  |      |  | 15,105  |               |  |  | 19,875  | 
|YPF                                                                         |  |               | 13,498  |  |      |  | 9,571   |               |  |  |        | 
|Pan American Energy S.R.L. (PAE)                                          |  |               | 64,821  |  |      |  |        |               |  |  | 70,287  | 
|PAS                                                                         |  |               | 6,890   |  |      |  | 66,825  |               |  |  | 12,069  | 
|PBB                                                                         |  |               | 45,559  |  |      |  |        |               |  |  |        | 
|Otros                                                                       |  |               | 5,596   |  |      |  | 16,113  |               |  |  | 205     | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 
|Total                                                                       |  |               | 311,905 |  |      |  | 279,562 |               |  |  | 281,126 | 
|                                                                            |  |               |         |  |      |  |         |               |  |  |         | 



| | (1) | Corresponds to the bills included in MetroGAS reorganization process (Note 9.e).
| | --- | ---------------------------------------------------------------------------------

| | (2) | As of December 31, 2013, 2012 and 2011, includes Ps. 36,866, Ps. 38,214, and Ps. 60,291 respectively, of income tax and VAT credits generated
by the reversion of the tariff increase credit (see Note 7.a.), which will be collected through a tax recovery appeal.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (3) | These advances are mainly related to the financing of TGS pipeline system expansion works for the rendering of firm transportation services
contracted by such clients. The main advance payments will be settled with the effective rendering of firm transportation service.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|5. | SUPPLEMENTAL CASH FLOW INFORMATION
|-- | ----------------------------------

For purposes of the consolidated statement of cash flows, the Company considers all highly iquid temporary investments with an original maturity of three months or less at the time of purchase to be cash
equivalents. The cash flow statement has been prepared using the indirect method, which requires a series of adjustments to reconcile net income for the period to net cash flows from operating activities.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Cash and cash equivalents at the end of the years ended December 31, 2013, 2012 and
2011 are as follows:



|                                                                        |  |               |           |   |      |  |          |               |  |  |          |  
|----------------------------------------------------------------------- |  | ------------- | --------- | - | ---- |  | -------- | ------------- |  |  | -------- | -
|                                                                        |  | 2013          |           |   | 2012 |  |          | 2011          | 
|                                                                        |  | (non-audited) |           |   |      |  |          | (non-audited) | 
|Cash and banks(1)                                                       |  |               | 125,664   |   |      |  | 97,100   |               |  |  | 237,700  |  
|Current investments                                                     |  |               | 1,119,686 |   |      |  | 744,573  |               |  |  | 788,230  |  
|Current investments with an original maturity of more than three months |  |               | (251,734  | ) |      |  | (138,523 | )             |  |  | (675,545 | )
|                                                                        |  |               |           |   |      |  |          |               |  |  |          |  
|Total cash and cash equivalents                                         |  |               | 993,616   |   |      |  | 703,150  |               |  |  | 350,385  |  
|                                                                        |  |               |           |   |      |  |          |               |  |  |          |  



| | (1) | As of December 31, 2013, 2012 and 2011, includes Ps. 79,937, Ps. 57,617 and Ps. 74.533, respectively, corresponding to balances from bank
accounts which accrue interes.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Non-cash transactions are as follows:



|                                                                                     |  |               |        |  |      |  |        |               |  |  |        | 
|------------------------------------------------------------------------------------ |  | ------------- | ------ |  | ---- |  | ------ | ------------- |  |  | ------ | 
|                                                                                     |  | 2013          |        |  | 2012 |  |        | 2011          | 
|                                                                                     |  | (non-audited) |        |  |      |  |        | (non-audited) | 
|Acquisition of property, plant and equipment through an increase in accounts payable |  |               | 31,738 |  |      |  | 15,836 |               |  |  | 15,836 | 
|Interest capitalization                                                              |  |               | 7,245  |  |      |  | 5,923  |               |  |  | 9,354  | 

Cash flows resulting from operations include net financial expenses generated by cash and cash
equivalents as of December 31, 2013, 2012 and 2011 for Ps. 168,616, Ps. 70,471 and Ps. 28,440 respectively.



|6. | LOANS
|-- | -----

Short-term and long-term debt as of December 31, 2013, 2012 and 2011 comprises the following:



|                                  |  |               |           |   |      |  |           |               |  |  |           | 
|--------------------------------- |  | ------------- | --------- | - | ---- |  | --------- | ------------- |  |  | --------- | 
|                                  |  | 2013          |           |   | 2012 |  |           | 2011          | 
|                                  |  | (non-audited) |           |   |      |  |           | (non-audited) | 
|Current loans:                    |  |               |           |   |      |  |           |               |  |  |           | 
|Ciesa ́s loans under litigation    |  |               |          |   |      |  |          |               |  |  | 867,152   | 
|Interests payable                 |  |               | 26,822    |   |      |  | 18,853    |               |  |  | 589,606   | 
|2007 EMTN Program: Series 1 notes |  |               | 609,753   |   |      |  |          |               |  |  |          | 
|Other loans                       |  |               | 12,164    |   |      |  | 4,477     |               |  |  |          | 
|Issuance expenses                 |  |               | (930      | ) |      |  | (930      | )             |  |  |          | 
|                                  |  |               |           |   |      |  |           |               |  |  |           | 
|Total current loans               |  |               | 647,809   |   |      |  | 22,400    |               |  |  | 1,456,758 | 
|                                  |  |               |           |   |      |  |           |               |  |  |           | 
|                                  |  |               |          
|Non- current loans:               |  |               |           |   |      |  |           |               |  |  |           | 
|Promissory Notes                  |  |               | 155,474   |   |      |  | 112,669   |               |  |  | 95,000    | 
|2007 EMTN Program: Series 1 notes |  |               | 1,829,258 |   |      |  | 1,837,954 |               |  |  | 1,609,799 | 
|Other loans                       |  |               | 33,602    |   |      |  | 15,556    |               |  |  |          | 
|Issuance expenses                 |  |               | (629      | ) |      |  | (1,559    | )             |  |  |          | 
|                                  |  |               |           |   |      |  |           |               |  |  |           | 
|Total non-current loans           |  |               | 2,017,705 |   |      |  | 1,964,620 |               |  |  | 1,704,799 | 
|                                  |  |               |           |   |      |  |           |               |  |  |           | 
|Total loans                       |  |               | 2,665,514 |   |      |  | 1,987,020 |               |  |  | 3,161,557 | 
|                                  |  |               |           |   |      |  |           |               |  |  |           | 

The breakdown of loans according to the currency is the following:



|                |  |      |           |  |               |  |           |               |  |  |           | 
|--------------- |  | ---- | --------- |  | ------------- |  | --------- | ------------- |  |  | --------- | 
|                |  | 2012 |           |  | 2011          |  |           | 2010          | 
|                |  |      |           |  | (non-audited) |  |           | (non-audited) | 
|Argentine pesos |  |      | 44,204    |  |               |  | 17,544    |               |  |  |          | 
|U.S. dollars    |  |      | 2,621,490 |  |               |  | 1,969,476 |               |  |  | 3,161,557 | 
|                |  |      |           |  |               |  |           |               |  |  |           | 
|Total loans     |  |      | 2,665,514 |  |               |  | 1,987,020 |               |  |  | 3,161,557 | 
|                |  |      |           |  |               |  |           |               |  |  |           | 



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



CIESA Loans

Due to the Argentine macroeconomic situation, starting with the enactment of the Public Emergency Law CIESA did not pay at
maturity, in April 2002, either the principal and the last interest installment, their notes issued in 1997 for a nominal value of USD 200 million, or the cap and collar of interest rate agreements.

As of April 2004, the shareholders and creditors of financial CIESA held a series of agreements, which, among other
actions, certain share in order to provide the necessary flexibility to advance the restructuring was planned transfers CIESAs financial debt above.

On September 1, 2005, the Company, its shareholders and its creditors signed the Debt Restructuring Agreement. The said agreement indicates the issuance of debt and exchange of notes for a nominal
value of US$ 20,400,000 and its associated accrued unpaid interests through the promissory notes for a total amount of US$ 22,671,982 which accrue interests at a 180 day LIBO rate plus 1% per annum, which cannot be higher than 5% annually. The
interests are due on a semi-annual basis while the principal amortization will be due on September 1, 2015. According to the terms of the promissory notes, the Company capitalized the interests accrued between its date of issuance and
March 1, 2008. In case the Company distributes dividends, the Company shall pay an early amortization amount equivalent to 5% of the dividends paid.

Since January 2009, se sucedieron una serie de reclamos judiciales ante los Tribunales de Nueva York and the shareholders amended the Shareholders Agreement. On May 18, 2011, the parties
to the CIESA Restructuring Agreement entered into a fourth amendment of such agreement, which, among other things, provides for the replacement of AEI by the Pampa Group in the CIESA Restructuring Agreement. On October 5, 2011, by note
No.11,362, ENARGAS expressed no regulatory objections to the CIESA Restructuring Agreement and expressed that it may be effective after approval is obtained from the CNDC. At the date of issuance of these financial statements the CNDC authorization
was not obtained even.

On July 13, 2012, Pampa and Petrobras Argentina Group entered into a settlement
agreement (the 2012 Settlement Agreement) waiving all cross-claims between Petrobras Argentina Group and AEI (and Pampa is its capacity as assignee to AEI) in the New York Litigation. Pursuant to the 2012 Settlement Agreement and as a
relevant condition thereof, the above mentioned parties cancelled all of the CIESA Notes. As compensation for the cancellation of its notes, CIESA, among other payments agreed to (i) the transfer of 34,133,200 of our common stock (representing
4.2962% of our outstanding Class B Shares), to PISA; and (ii) once the pending governmental approval is obtained, the transfer of shares stock representing 40% of the capital stock in CIESA that is currently held in the Trust to PISA. Upon
completion thereof, PISA will be the direct and indirect holder of 50% of the capital stock of CIESA.

As a
result of the full settlement of CIESAs total financial debt, in the year ended December 31, 2012 the Company recorded a gain of Ps. 844,920 which was recorded as Financial Results.

On December 17, 2013 PISA transfer to Altieri Holdings Inc., all the rights and credits, including principal and
interests of the promissory notes issued on September 1, 2005, mentioned above.

Issuance of notes under the 2007
Global Program:

The Extraordinary Shareholders meeting held on December 21, 2006 approved the
creation of the Global Program for the issuance of new notes of a maximum aggregate amount of US$ 650,000,000 (The 2007 Global Program) This Program was authorized by the CNV on January 18, 2007.

Accordingly, between May and June 2007, the Company refinanced its outstanding indebtedness through the issuance of
US$500.0 million new notes (the 2007 Notes), the early prepayment of its outstanding debt through an exchange offer, the cancellation of outstanding notes which did not participate in the exchange



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



offer and cancellation of bank loans. The 2007 Notes have a coupon rate of 7.875%, with interest being paid semiannually, and maturity date of May 2017. Principal on the 2007 Notes is to be paid
in four equal annual installments beginning in May 2014 until maturity. The 2007 Notes are traded in the Bolsa de Comercio de Buenos Aires (BCBA), the Mercado Abierto Electrónico (MAE) and the Euro MTF of
the Luxembourg Exchange.

The Companys goal in issuing these notes was to improve the Companys
financial indebtedness profile and to ease the restrictions imposed by the prior debt restructured in 2004, including but not limited to dividend distribution, additional indebtedness and capital expenditures.

Moreover, between August 2008 and August 2010, considering favorable conditions in the market, the Company reduced its
financial indebtedness through the cancellation of a portion of the 2007 Notes for an aggregate amount of US$ 125,976,000, which had previously been purchased on the market at a lower price. As of December 31, 2013, the Companys financial
indebtedness amounts to US$ 374,024,000. Principal payments will amount to US$ 93,506,000 each.

Covenants:

The 2007 Notes contain certain restrictive covenants that, among other things, limit the ability of the Company to
(i) incur additional indebtedness, (ii) pay dividend, (iii) issue guarantees, (iv) dispose certain assets and (v) make certain related party transactions. The Company was in compliance with all covenants of the 2007 Notes as
of the date of issuance of these financial statements.

The foregoing limitations are subject to exceptions as
set forth in the Indenture. For example, the Company may incur in additional indebtedness as long as (i) after issuing it, the consolidated coverage ratio (calculated as the quotient of the consolidated adjusted EBITDA -earnings before
financial results, income tax, depreciation and amortization-) and the consolidated interest expense) is equal or higher than 2.0:1; and (ii) the consolidated debt ratio (calculated as the quotient of the consolidated debt and the consolidated
EBITDA) is equal or lower than 3.75:1; (ii) it is incurred to refinance outstanding debt and (iii) it is originated in advances from customers.

Additionally, the Company may pay dividends as long as (i) the Company is not in default under 2007 Notes, (ii) immediately after any dividend payment, the Company would be able to incur in
additional indebtedness pursuant to item (i) and (ii) of the preceding paragraph.

Other Loans:

On August 24, 2012, TGS signed a Ps. 20,000,000 financial loan with Santander Río Bank bearing interests at
15.01% annual rate which are paid monthly. It amortizes principal in nine quarterly and equal installments of Ps. 2,222,000 which are payable as from August 26, 2013.

On November 22, 2013, the Company entered into a loan with Itau Bank for Ps. 20.0 million. The loan bears interest at
an annual fixed rate of 15.25% payable on a monthly basis. The loan has a repayment schedule with 25 monthly installments and final maturity in November 2016. The first installment is in November 2014.

On December 3, 2013, the Company entered into a loan with Macro Bank for Ps. 10.0 million. The loan bears interest at
an annual fixed rate of 15.25% payable on a monthly basis. The loan has a repayment schedule with equal and monthly installments as from July 2014 and final maturity in April 2017.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



|7. | REGULATORY FRAMEWORK
|-- | --------------------



| | a) | General framework and current tariff context:
| | -- | ---------------------------------------------

The Companys Natural Gas Transportation business is regulated by Law No. 24,076 (the Natural Gas
Act), its regulatory Decree No. 1,738/92 and by regulations issued by ENARGAS, which is entitled, among other things, to set the basis for the calculation, monitoring and approval of tariffs (the Regulatory Framework).
According to the Regulatory Framework, transportation tariffs were to be calculated in US dollars and converted into Argentine pesos at the time the customer was billed using the exchange rate prevailing at that time. The basic natural gas
transportation tariffs charged by TGS had been established at the time of the privatization of GdE and were to be adjusted, subject to prior authorization, in the following cases: (i) semi-annually to reflect changes in the US producer price
index (PPI) and (ii) every five years according to efficiency and investment factors determined by ENARGAS. The efficiency factor is a reduction to the base tariff resulting from future efficiency programs while the
investment factor increases the tariffs to compensate the licensees for future investments which are not repaid through tariffs. Also, subject to ENARGAS approval, tariffs were to be adjusted to reflect non-recurrent circumstances or tax
changes, other than income tax.

The terms and conditions as described in the precedent paragraph in connection
with tariff adjustments contemplated within the Regulatory Framework are no longer effective since the enactment of the Public Emergency Law in early 2002 (the Emergency Law), which, among other provisions, eliminated tariff increases
based on US dollar exchange rate fluctuations, foreign price indexes or any other indexing procedure and established a conversion rate of one peso to one US dollar for tariffs. The Emergency Law also granted the Executive Branch power to renegotiate
contracts entered into with private utility companies, pursuant to the framework included in the said law as long as it is in force, which will expire in December 31, 2015, after several extensions.

In July 2003, the Unit for Renegotiation and Assessment of Utilities Contracts (UNIREN) was created under the
joint jurisdiction of the Ministry of Economy and Production and the Ministry of Federal Planning, Public Investment and Services (MPFIPyS). UNIREN conducts the renegotiation process of the contracts related to utilities and public
works, and is entitled to enter into total or partial agreements with the licensees and submit projects regulating the transitory adjustment of tariffs and prices, among other things.

In June and November 2005, TGS received two proposals from UNIREN. Said proposals provided for a tariff increase of 10%,
an overall tariff review, and required TGSs and its shareholders abandonment of any claim or lawsuit resulting from the effects of the Public Emergency Law on the License prior to the effectiveness of a renegotiation of the License, and
also demanded TGS to hold the Argentine government harmless from any claim or lawsuit filed by its shareholders. Additionally, said proposals required the Companys and its shareholders abandonment of any future claim or lawsuit regarding
the PPI tariff adjustments which were not applied in 2000 and 2001. TGS responded to the proposals, and declared that the original 10% increase was insufficient and committed not to file any administrative, arbitration or judicial claim or lawsuit
in Argentina or abroad, as long as a reasonable renegotiation agreement was reached. Moreover, TGS stated that the Company is determined to make its best efforts to obtain similar commitments from its investors.

In November 2005, in response to the requirement made by UNIREN, CIESA and Petrobras Argentina Holding (as CIESAs
shareholder) confirmed that they had not initiated or intended to initiate in the future any claim against the Argentine Republic. Furthermore, Ponderosa Assets L.P. (Ponderosa), as TGS and CIESAs indirect shareholder at that time,
informed on the existence of a claim which, jointly with Enron Corp., it initiated against the Argentine Republic before the International Center for the Settlement of Investment Disputes (ICSID) under the scope of the World Bank, and
that it would only consider waiving its claim if Ponderosa has received fair compensation. In May 2007, the ICSID ordered the Argentine Government to pay US$ 106.2 million to Enron Corp. An ICSID committee annulled the award rendered in 2007
and ordered the American corporation to reimburse the Argentine Republic the total



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



amount of the annulment award costs. This annulment does not prevent the plaintiff from filing a new claim before said tribunal. On October 18, 2010, Enron Creditors Recovery Corp. (Enron
Corps new corporate name) and Ponderosa Assets filed a new claim against the Argentine Republic before the ICSID. In June 2011, the Tribunal that will hear the case was constituted.

In October 2011, Pampa Energía acquired the rights to control, suspend and to abandon the legal actions of
Ponderosa and Enron Creditors Recovery Corp against the Argentine government under the Call Option Agreement signed between Pampa Energía, Inversiones Argentina II and GEB Corp. on March 11, 2011. On January 13, 2014, by
agreement of the disputing parties, the legal action of Enron Corp. and Ponderosa Assets LP held against the Argentine Republic before the ICSID was suspended until July 12, 2014.

On October 9, 2008, TGS signed a transitional agreement with UNIREN that contemplated a tariff increase of 20%, which
is retroactively applicable to September 1, 2008. According to this agreement, the funds generated by this tariff increase would be temporarily deposited in a trust fund until TGS needed them to carry out an investment plan for its pipeline
system. The total of the investment plan had been executed with TGS own funds. In September 6, 2011, the investment plan was considered completed by ENARGAS.

On December 3, 2009, the Executive Branch ratified this transitional agreement through the Presidential Decree
No. 1,918/09. By means of this Decree, TGS will be able to bill the tariff increase to its clients as soon as ENARGAS publishes the new tariffs chart and sets the methodology to bill the retroactive effect. However, ENARGAS has not carried out
these duties and due to this delay, in August 2010, TGS requested ENARGAS authorization to issue the Tariff Chart including the 20% transitory tariff increase and the retroactive collection methodology, requesting the application of an interest rate
in line with the established method of payment. ENARGAS responded to TGS that they had submitted the records and the tariff project to the Coordination and Management Control Under Secretariat (SCyCG), which is under the scope of the
MPFIPyS, based on the Resolution No. 2000/2005 of the MPFIPyS.

On September 30, 2010, the Company
filed an acción de amparo (a summary proceeding to guarantee constitutional rights) against ENARGAS and the SCyCG in order to obtain the implementation of the new tariff increase schedule. On October 25, 2010, ENARGAS and the
SCyCG provided the information required by the Judge on October 19, 2010. On November 8, 2010 the Company was served notice of the judgment that upheld the injunction filed by TGS. Said judgment orders the SCyCG to return to ENARGAS
-within a two-day period- the documents remitted by said body in connection with the Tariff Chart applicable to TGS under Decree No. 1,918/09; and orders ENARGAS -within two days following reception of said documents- to set the Tariff Chart
and the retroactive collection methodology. ENARGAS and the SCyCG filed an appeal against the judgment that upheld the acción de amparo filed by TGS.

Moreover, on November 16, 2010, TGS received an invitation from UNIREN in order to move forward with the
renegotiation of the License Agreement within the scope and in the terms of the Emergency Law, to which end UNIREN requires the suspension of claims, appeals, or administrative or judicial action taken against the Federal Government in connection
with or arising from the Renegotiation Process of remuneration under the License Agreement. On November 18, 2010, the Company decided to authorize the suspension of the acción de amparo mentioned above for a twenty- working-day
period automatically renewable at the expiration of said term (except that the Board before or at the expiration of each period decides not to renew it) in order to move forward with the renegotiation of the License Agreement. On December 28,
2010, TGS requested ENARGAS and the MPFIPyS the subscription of the suspension, and as of the date of the issuance of these consolidated financial statements, the Company has not received any favorable respond in this matter.

On April 5, 2011, the Second Chamber of the Court of Appeals in administrative federal matters set a 60 business day
term for the SCyCG to act according to the provisions of Resolution No. 2000/2005 and return to ENARGAS the documents remitted by said Body, and for ENARGAS to decide within a 60 business day term as from reception of said documents-,
following verification of compliance with the



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



provisions set forth in the transitory agreement dated October 9, 2008, on the tariff adjustment and the Transitional Tariff Chart stipulated therein. TGS and ENARGAS filed an extraordinary
appeal before the Court of Appeals, which were dismissed by the Court of Appeals on May 27, 2011. On June 14, 2011, ENARGAS filed an appeal before the Supreme Court of Justice requesting that the appeal dismissed by the Court of
Appeals be accepted. On August 25, 2011, the SCyCG returned to ENARGAS the administrative documents giving notice Resolution No. 2000/2005. On June 11, 2012 the Supreme Court of Justice requested the files of the main proceedings
in order to solve the appeal filed by ENARGAS, and thereby the Company recorded the fulfillment of the court action by the SCyCG. Since June 25, 2012, the legal proceedings are ongoing at National General Attorneys Office, organism where
they were referred by the Supreme Court of Justice for a prior intervention before the issuance of its ruling.

As over one year has elapsed since the enactment of the Decree No. 1,918/09 and the granting of the above mentioned
appeal with suspensive effect, which implies a substantial change in the scenario considered when the tariff increase was recorded, on December 16, 2010 the Board of Directors of the Company resolved: (i) to discontinue the recognition of
the tariff increase revenue; (ii) to reverse the credit provision of the tariff increase revenue already accrued in the year ended December 31, 2009 and in the nine-month period ended September 30, 2010. The reversal of the tariff
increase does not imply any resignation to its right resulting from the Decree No. 1,918/09.

According to
the 2008 transitional agreement, TGS should reach an agreement with UNIREN on the terms and conditions of the overall renegotiation before the expiration date under the Public Emergency Law, on December 31, 2015. If TGS does not reach this
agreement, then UNIREN would inform the Executive Branch and provide it with the recommendations of the procedural steps to follow.

In this regard, in October 2008, TGS received an integral license renegotiation agreement from UNIREN (which includes the initial 20% tariff increase), whose purpose is the license renegotiation and the
overall tariff revision. In October 2011, TGS received a new proposal from UNIREN which included similar terms and conditions from the ones included in the last proposal received in 2008. This proposal was accepted by TGS allowing UNIREN to initiate
the administrative process for signature when it concluded favorably after the intervention of different competent organisms. UNIREN issued a supplementary report for the subscription of the renegotiation agreement between the Argentine Government
and TGS, filing it on December 22, 2011 together with the Agreement filed by TGS before the Legal Under Secretary of the MPFIPyS. Taking into consideration that the case was returned to UNIREN, on July 16, 2012 the Company called for the
continuation of appropriate administrative proceedings. On October 4, 2012, TGS notified the UNIREN the filing made before ENARGAS and the Comisión Nacional de Defensa de la Competencia (CNDC) regarding the suspension
of the claim initiated by Enron Corp. and Ponderosa against the Argentine Republic mentioned above  the last was until July 12, 2014-, and formally required the order of quick sentence.

The License establishes, among other restrictions, that TGS will not be allowed to assume CIESAs obligations, nor to
grant loans, real guarantees or any other kind of favor to CIESAs creditors.



| | b) | Regulatory Framework for non-regulated segments
| | -- | -----------------------------------------------

The Production and Commercialization of Liquids segment is not regulated by ENARGAS, and as it is provided in the Transfer
Agreement, is organized as a separate business unit within the Company, keeping accounting information separately. However, the Federal Energy Bureau sets the propane and butane sales price for the local market. This agency determines periodically a
minimum volume of propane and butane to be commercialized by the producers in the local market in order to guarantee the domestic supply.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Despite the Liquids Production and Commercialization segment is not
subject to regulation by ENARGAS, the Argentine government has introduced a set of regulations in recent years having an impact on its operations.

On September 19, 2008 the Federal Energy Bureau and propane and butane (LPG) producers, among others, signed an agreement on the price stabilization of the LPG bottles whereby the
industry players committed to a substantial reduction in the price of LPG ten (10), twelve (12) and fifteen (15) kgs. bottles, to support low-income consumers throughout the national territory, guarantying the supply of the product at a
fixed price below the market price- to the producers with a quota to each of them. This price reduction is partially offset by a subsidy paid by a trust fund created for that purpose. This trust fund receives the funds provided by the rise in
the wellhead natural gas price which was authorized by the Argentine government.

The validity period was
originally agreed until December 1, 2009. As from that date, there were several extensions of the agreement by means of annual amendments. The most recent amendment was signed on December 28, 2012 and was notified through Resolution N°
492/2013 of the Federal Energy Bureau.

Through Presidential Decree No. 2,067/08 the Executive Branch
created a tariff charge to be paid by (i) the users of regulated services of transportation and / or distribution, (ii) natural gas consumers receiving gas directly from producers without making use of transportation systems or natural gas
distribution, (iii) the natural gas processing companies in order to finance the import of natural gas. The payment of the tariff charge was selectively subsidized -since its inception- according to the destination of the natural gas. In
November 2011, ENARGAS issued Resolution No. 1,982/11 and 1991/11 (the Resolutions) which modified the list of the subsidy beneficiaries, and thus, involved a charge increase for many of our clients, and for certain of TGS own
consumption. The tariff charge increased from Ps. 0.049 to Ps. 0.405 per cubic meter of natural gas effective from December 1, 2011, representing a significant rise of the variable costs of natural gas processing.

In order to avoid this damage, the Company appealed against the Presidential Decree and the Resolutions including National
Government, ENARGAS and MPFIPyS as defendants. On July 10, 2012, TGS obtained from the Court of Appeals in administrative federal matters based in the Autonomous City of Buenos Aires, the issue of a preliminary injunction which provides that
the Company is exempt from the billing and the payment of the tariff charge increase according to the Resolutions, pending the resolution of the claim.

Should this situation disclosed in Note 9.f was not resolved favorably; TGS could have in the future a significant impact on the results of operations. Notwithstanding this, the Management believes it has
sufficient grounds to defend its position.



| | c) | Expansion of the natural gas transportation system
| | -- | --------------------------------------------------

Since 2004, the natural gas transportation system expansion works have been carried out under the Gas Trust Fund Program
framework, which was created through Executive Branch Decree No. 180/04 and Resolution No. 185/04 issued by the MPFIPyS, aimed at financing the expansion of the national natural gas transportation system in a manner different from that
established in the License.

Under such framework, the MPFIPyS, the Federal Energy Bureau and the natural gas
transportation companies, among others, signed in April 2006 a Letter of Intent to carry out the second expansion of the gas pipeline system. In December 2006, the gas trust fund contracts for the second expansion were signed, and TGS entered into
an agreement under which the Company will manage the expansion project.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Expansion works initiated in 2006, which where planned in gradual
stages, were executed with the aim to be financed by other gas trust funds, whose trustors are the gas producers and the shippers who subscribed the additional capacity. The works will be repaid with a new tariff charge that will be finally paid by
the business and industrial users with firm transportation contracts, except for the distribution companies. In addition, TGS is in charge of the rendering of firm transportation services. For these services, TGS is paid a monthly Charge for Access
and Use (CAU). As of December 31, 2012, the incremental transportation capacity was 314 MMcf/d after the works came into service.

In May 2011, TGS received Valores Representativos de Deuda (debt securities) from the trust fund, date of issue February 2010, which cancelled the account receivable of Ps.
48.1 million related to services rendered for the 247 MMcf/d expansion works. These debt securities amortize principal in 85 monthly, consecutive and equal installments and bear CER interest plus an 8% from their date of issue.

In October 2011, TGS, the Federal Energy Bureau and the trustee of the gas trust funds agreed the terms and conditions
under which TGS will render the operation and maintenance services of the assets associated with the incremental transportation capacity of 378 MMcf/d.

Moreover, in October 2011 an amendment to the management agreement corresponding to the works initiated in 2006 was agreed in order to include management services associated with an expansion which will
increase firm transportation capacity by 131 MMcf/d and its remuneration, which amounted to Ps. 37 million. Said agreement provided an advance payment equivalent to 20% of the total remuneration, and the remainder 80% through debt securities which
amortize principal, in 96 monthly, consecutive and equal installments and bear CER plus a spread of 8% from their date of issue.

As of the date of the issuance of these consolidated financial statements, TGS received debt securities from the trust fund which cancelled the 90% of the mentioned advanced payment and the works that
started operating. The principal of said debt securities amounted to Ps. 19.9 million (including accrued interest) as of December 31, 2013 and it is amortized in 96 monthly, consecutive and equal installments which bear CER plus a spread of 8%
from their date of issue. The 10% remaining amount was paid in cash.



| | d) | Essential assets
| | -- | ----------------

A substantial portion of the assets transferred by GdE has been defined as essential for the performance of the natural gas transportation service. Therefore, the Company is required to keep separated and
maintain these assets, together with any future improvements, in accordance with certain standards defined in the License.

The Company may not, for any reason, dispose of, encumber, lease, sublease or loan essential assets nor use such assets for purposes other than the provision of the licensed service without
ENARGAS ́s the prior authorization. Any expansion or improvements that it makes to the gas pipeline system may only be encumbered to secure loans that have a term of more than one year to finance such extensions or improvements.

Upon expiration of the License, the Company will be required to transfer to the Argentine government or its designee, the
essential assets listed in an updated inventory as of the expiration date, free of any debt, encumbrances or attachments, receiving compensation equal to the lower of the following two amounts:



| | i) | the net book value of the essential assets determined on the basis of the price paid by the acquiring joint venture, and the original cost of
subsequent investments carried in US dollars and adjusted by the PPI, net of accumulated depreciation according to the calculation rules to be determined by ENARGAS; or
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | ii) | the net proceeds of a new competitive bidding.
| | --- | ----------------------------------------------



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Once the period of the extension of the License expires, the Company
will be entitled to participate in the New Bidding, and thus, it shall be entitled to:



| | (i) | that its bid in the New Bidding be computed at an equal and not lower price, than the appraisal value determined by an investment bank selected by
ENARGAS, which represents the value of the business of providing the licensed service as it is driven by the Licensee at the valuation date, as a going concern and without regard to the debts;
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | to obtain the new License, without payment, in the event that any bid submitted in the new tender exceeds the appraised value;
| | ---- | ------------------------------------------------------------------------------------------------------------------------------



| | (iii) | to match the best bid submitted by third parties in the new Bidding, if it would be higher than its bid mentioned in (i), paying the difference
between both values to obtain the new License;
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iv) | if the Licensee has participated in the New Bidding but is unwilling to match the best bid made by a third party, to receive the Appraisal Value as
compensation for the transfer of the Essential Assets to the new licensee, any excess paid by the third party shall remain for the grantor.
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|8. | COMMON STOCK AND DIVIDENDS
|-- | --------------------------



| | a) | General
| | -- | -------

As of December 31, 2013, 2012 and 2011 CIESAs common stock subscribed, paid and issued is as follow:



|                 |  |  |             | 
|---------------- |  |  | ----------- | 
|Classes of stock |  |  |            
|                 | 
|Class A1       |  |  | 162,898,767 | 
|Class A2       |  |  | 162,898,767 | 
|Class B1       |  |  | 156,510,581 | 
|Class B2       |  |  | 92,628,711  | 
|Class B3       |  |  | 63,881,870  | 
|                 |  |  |             | 
|                 |  |  | 638,818,696 | 
|                 |  |  |             | 



| | b) | Limitation on the transfer of the Companys shares
| | -- | --------------------------------------------------

The Bid Package for the privatization of GdE (the Bid Package) stipulates that prior authorization of ENARGAS
shall be required in the following instances:



| |  |  | Transfer of Class A common shares representing 51% of the common stock unless such transfer is made within companies belonging to the same
economic group.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | When any shareholder of CIESA has qualified to buy CIESA ́s stock due to the shareholders equity, guarantee and/or technical background
of its parent company and the latter sells its shares on the first one to other shareholders, or the current management is discontinued.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Any other corporate action implying a reduction in ownership interest.
| | - |  | ----------------------------------------------------------------------



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



| | c) | Limitation on the transfer of TGS shares
| | -- | -----------------------------------------

TGSs by-laws provide that prior approval of ENARGAS and the unanimous
approval of CIESAs shareholders, under agreements among them, must be obtained in order to transfer Class A shares (representing 51% of common stock). The Bid Package states that approval of ENARGAS will be granted, provided that:



| |  |  | The sale covers 51% of common stock or, if the proposed transaction is not a sale, the transaction that reduces the shareholding will result in the
acquisition of a shareholding of not less than 51% by another investment company; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The applicant provides evidence to the effect that the transaction will not impair the operating quality of the licensed service.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------

TGSs shares are traded on the Bolsa de Comercio de Buenos Aires
(BCBA) and in the form of the ADS (registered with the SEC and representing 5 shares each) on the New York Stock Exchange.

In addition, the By-laws provide for the issuance of Profit Sharing Vouchers, as defined in Article 230 of the Argentine Business Associations Law, which Vouchers entitle all regular employees to share in
0.25% of the Companys net income for each year.

According to law No. 25,063, the dividends paid in
cash or in kind, in excess of the tax profit, will be subject to a 35% withholding tax of the income tax, as sole and only payment.

Furthermore, TGS is subject to certain restrictions for the payment of dividends, which were contemplated in the outstanding debt agreements (Note 6  Covenants).



| | d) | Restrictions on distribution of retained earnings
| | -- | -------------------------------------------------

Under current Argentine legal requirements and CNV standards, 5% of each fiscal years net income must be
appropriated into a legal reserve, provided that there is no unappropriated retained deficit. In such case, the 5% should be calculated on any excess of the net income over the unappropriated retained deficit. This appropriation is legally binding
until such reserve equals 20% of the amount which results from the sum of the Common stock nominal value and the balance of Cumulative inflation adjustment to common stock.



| | e) | Distribution of cash dividends
| | -- | ------------------------------

TGS ́s Board of Directors, in its meeting held on December 6, 2012, approved the distribution of cash dividends of Ps. 150 million, affecting part of the reserve for future dividends
created by the Ordinary Annual Shareholders Meeting. This dividend was effectively paid in January 2013.

As of December 31, 2013, the debt corresponding to dividends is disclosed under Dividends payable, which
is net of the withholding tax on personal assets to be made to holders of share, if applicable, at the time of cash payment.



|9. | LEGAL AND REGULATORY MATTERS
|-- | ----------------------------



| | a) | Exemption of the sales of liquids in Turnover Tax
| | -- | -------------------------------------------------

In the framework of the Tax Agreement subscribed by the Argentine Government and the Provinces in 1993, and as from the
enactment of provincial Law No. 11,490, TGS required the Tax Bureau of the Province of Buenos Aires to exempt the sales of liquids from the turnover tax. In September 2003, the Tax Bureau of the Province of Buenos Aires, through Resolution
No. 4,560/03, denied the exemption. In October 2003, the Company filed an administrative appeal with the Tax Court of the Province of Buenos Aires.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



In February 2007, the Tax Court partially upheld TGSs
complaint. In its pronouncement, the Tax Court stated that ethane sales were within the scope of the turnover tax exemption but that neither propane nor butane sales qualified for the exemption in the domestic market, because they were not raw
materials for an industrial process.

TGS filed an appeal in May 2007 before the Province of Buenos Aires Court
alleging that propane and butane sales might be utilized for other uses different from petrochemical industry. As of the date of the issuance of these consolidated financial statements, the Court has not issued any sentence.

On September 26, 2005, TGS was notified of the results of the tax assessment process regarding the turnover tax for
the period January 2002July 2003, which amounted to Ps. 4.4 million plus interest. On October 18, 2005, TGS presented the corresponding discharge on its belief that the Production and Commercialization of Liquids activity was
conducted under the tax exemption regime discussed above. On April 12, 2006 the motion to dismiss was rejected and therefore, the Company filed corresponding appeals with the Tax Bureau of this province and jointly with the Arbitral Commission.
For that reason, the Tax Bureau of the Province of Buenos Aires resolved that until the Arbitral Commission notifies its resolution, the process is suspended. On April 20, 2010, the Arbitral Commission notified its resolution against TGS, and
thus, the Company filed an appeal before the Plenary Commission, which in November 2012, made the case to judgment.

On February 19, 2008, TGS was notified with a formal assessment notice of Ps. 3.6 million (not including interest) regarding the payment of the turnover tax corresponding to the fiscal period
ranging from August 2003 to December 2004. On March 11, 2008, TGS filed a discharge within the Tax Bureau of the Province of Buenos Aires which was rejected and thus, the Company filed an appeal with the Tax Bureau of this province in January
2009. As well, the Company appealed with the Arbitral Commission, and thus, the Tax Bureau of this province suspended the process until the Arbitral Commission notifies its resolution.

On December 4, 2012, TGS was notified with a new formal assessment notice of Ps. 0.8 million regarding the
payment of the turnover tax corresponding to the fiscal year 2006 related to the production of liquefied gas, butane, propane and natural gasoline.

On February 15, 2013, the Tax Court ruled in the same as the criteria set by the Plenary Commission ordering the Tax Bureau of the Province of Buenos Aires to practice a new assessment. On
July 24, 2013, TGS received the assessment with no observations. On October 11, 2013 the Tax Court issued a decision resolving not to approve the settlement made by Tax Bureau of the Province of Buenos Aires.

As of December 31, 2013, 2012 and 2011 TGS maintains a provision of Ps. 43.3 million, Ps. 39.1 million and
34,0 million, respectively.



| | b) | Turnover tax calculated on the natural gas price used by TGS as fuel to render its transportation services
| | -- | ----------------------------------------------------------------------------------------------------------

In November 2002, the Tax Bureau of the province of Santa Cruz sent TGS a formal assessment notice for the payment of the
turnover tax calculated on the natural gas price used by TGS as fuel to render its transportation services. This assessment corresponds to the period from January 1998 to October 2002. In August 2005, the Company paid the amount claimed of Ps.
1.6 million (including interests until December 4, 2002) and started a tax recovery process, first exhausting all other procedural steps, with the Tax Bureau of the province and then initiating a proceeding in the Provincial Tax Court.

In November 2012, the Department of Revenue of the Province of Santa Cruz sent TGS a formal assessment notice
for the payment of the turnover tax for the periods from January 2006 to November 2007 and from January 2008 to April 2011 by the amount of Ps. 5.9 million. On November 23, 2012, the Company filed its appeal, which is pending.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



In November 2005, TGS received a notice from the Tax Bureau of the
province of Río Negro claiming the payment of Ps. 0.2 million, on the same grounds as those of the Province of Santa Cruz, for the period from January 1999 to May 2005. On February 1, 2008, TGS initiated a tax recovery process with
the Tax Court of the province of Río Negro to obtain the refund of Ps. 0.5 million paid in November 2007, after exhausting the same procedural steps followed in the case of province of Santa Cruz.

In December 2008, the Tax Bureau of the province of Tierra del Fuego e Islas del Atlántico Sur sent TGS a formal
assessment notice for the payment of Ps. 6.4 million corresponding to 2002-2007 period, which was denied by the Company. On October 19, 2009, said Tax Bureau notified TGS the dismissal of the motion and thus, on October 28, 2009, the
Company filed an administrative appeal.

On February 4, 2013, the Ministry of Economy issued its
resolution which dismissed the appeal filed by TGS. For that reason TGS had to prove payment of Ps. 11.2 million plus interest in respect of capital. On June 12, 2013, TGS initiated legal actions leading to the recovery of such amounts. On
September 13, 2013, TGS was noticed of the dismissal of the administrative appeal filed. On September 26, 2013, TGS paid the amount of Ps. 6.8 million and shall initiate the contentious administrative action in order to repeat the
amount paid.

As of December 31, 2013, 2012 and 2011 the Company recorded a provision of Ps.
85.9 million, Ps. 84,5 million and Ps. 75,5 million respectively in respect of this contingency under the line item Provisions for contingencies, which amount was determined in accordance with the estimations of tax and
interests, that would be payable as of such date, in case this contingency turns out unfavourable for the Company.

The Companys management believes that, in case the Companys position fails and the turnover tax has to be paid, TGS has a right to recover it by a transportation tariff increase as set forth
in the License.



| | c) | MetroGAS financial situation
| | -- | -----------------------------

MetroGAS reorganization process

On January 11,
2013, MetroGAS proceeded with the issuance of the notes which canceled verified or admissible unsecured claims. These two negotiable obligations (the Notes) with maturity date on December 31, 2018, both nominated in US Dollars were:
i) the Class A equal to fifty three point two percent (53.2%) of the amount of the verified or admissible unsecured claims and ii) the Class B equal to forty six point eight (46.8%) of the amount of the verified or admissible
unsecured claims. Class A Notes bear a fixed interest rate of 8.875% and are payable semiannually on June 30 and December 31 of each year. According to the terms and conditions of the issuance, MetroGAS decided to capitalize accrued
interest under Class A Notes from January 1, 2011 to December 31, 2012 and to pay in cash interest accrued from January 1, 2013 to January 11, 2013. Class A Notes shall be due and pay in full in a single payment since
their issuance date while Class B Notes shall only become due and payable as a result of the occurrence of certain events of default before June 30, 2014, in accordance with the provisions of the terms and conditions of the Notes. If this event
shall have not occurred on or before deadline, Class B Notes shall be automatically cancelled.

The unsecured
credit will be considered within the reorganization process proposal, in case the tariff increase is in pursuit of the transitional agreement mentioned in Note 7.a).

On February 8, 2013, TGS received from MetroGAS the Notes mentioned above. The nominal value of the notes amounted to
US$6,181,000 of which of US$3,456,000 and US$2,725,000 correspond to Class A and B, respectively. These Notes were initially recognized at their fair value and are disclosed under the line Other Non-Current Investments. Finally, on
November 8, 2013, the presiding judge ordered the completion of the reorganization process of MetroGAS.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Post-reorganization proceeding debt

In September 2012 MetroGAS has reported that due to its financial situation, it has decided to extend the terms of
cancellation of its payment obligations with suppliers and transporters of natural gas. Pursuant to this, TGS has taken different measures to the collection and made aware of YPF S.A. in its capacity as controlling shareholder of MetroGAS, the
Ministry of Federal Planning, Infrastructure and Services, the Federal Energy Bureau and ENARGAS of late payments and outstanding debt obligations.

Finally, TGS agreed with MetroGAS the repayment of all sums due in relation to the natural gas transportation services, which were actually collected on December 31, 2013. At that date, the
outstanding principal balance amounted to Ps. 18.1 million, with no balance billing due by the client. Subsequent to year end and after the billing, the client had not paid the balance mentioned above and thus, the Company is analyzing the
various measures to be adopted in order to manage the collection of its receivables. Management believes that as of the date of the issuance of these consolidated financial statements, this situation does not represent a risk of default on
outstanding balances.



| | d) | Action for annulment of ENARGAS Resolutions No. I-1,982/11 and No. I-1,991/11 (the Resolutions)
| | -- | -------------------------------------------------------------------------------------------------

Within the framework of a legal action against Resolution No. 1,982/11 and 1,991/11, on July 10, 2012, TGS
obtained from the Court of Appeals in administrative federal matters based in the Autonomous City of Buenos Aires, the issue of a preliminary injunction, ordering the Executive Branch (the Federal Energy Bureau), ENARGAS and Nación
Fideicomisos S.A., as collection agents, not to bill or intend to collect from TGS the charge with the amounts in compliance with the provisions set forth in both Resolutions and to continue the billing and collection of the amounts stated prior to
the issuance of said Resolutions.

ENARGAS and National Government appealed the granting of the injunction
before the Court of Appeals in administrative federal matters. On December 21, 2012, TGS expanded the grounds of demand and requested the case to be referred to the defendants.

The violation of the constitutional principles that govern matter and annulment of administrative acts carried out to
implement the Resolutions mentioned above, is substantially the fundamental issue raised by TGS in the legal action, because no tax burden may be enforceable without the prior existence of a law framed within the constitutional precepts, and created
by the Legislative Branch by a special law. This has been the basis adopted by the presiding judge to issue the injunction mentioned. Furthermore, TGS, to broaden the basis for their demand to issue before it, has referred to the presiding judge
confiscatory character that would charge your economic and financial condition of being in full force Resolutions that implement it.

TGSs Management believes it has enough valid arguments to defend their position, and thus, the Company has not recorded the increase of the charge for gas consumptions from the date of obtaining the
injunction until the date of the issuance of these consolidated financial statements. In the event this injunction had not been obtained, the impact of the Resolutions, taking into account the possibility of carryforward the charge to the sales
price of the product, would have implied a net loss of Ps. 189.4 million



| | e) | Repetition action of VAT and income tax
| | -- | ---------------------------------------

On October 9, 2008, TGS signed a transitional agreement with UNIREN that contemplated a tariff increase of 20%, which
would be retroactively applicable to September 1, 2008. On December 3, 2009, the Executive Branch ratified this transitional agreement through the Presidential Decree No. 1,918/09. By means of this decree, TGS will be able to bill the
tariff increase to its clients as soon as ENARGAS



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



publishes the new tariffs schedule and sets the methodology to bill the retroactive effect. Finally, this administrative act did not become effective and therefore in September 2010 TGS filed an
acción de amparo (a summary proceeding to guarantee constitutional rights). Due to the passing of time since the enactment of Decree No. 1918/09, on December 16, 2010 the Board of Directors of the Company resolved to discontinue the
recognition of the tariff increase revenue and to reverse the credit provision of the tariff increase revenue already accrued in the year ended December 31, 2009. The reversal of the tariff increase does not imply any resignation to the
Company ́s right resulting from the Decree No. 1,918/09.

On May 24, 2013, TGS filed a tax
recovery appeal with respect to the income tax and VAT credits generated by the reversal of the tariff increase credit mentioned above. After the omission to pass judgment on the claim within the three months of the filing of the tax recovery
appeal, on October 9, 2013, TGS filed an appeal before the Federal Tax Bureau. The total amount claimed by TGS amounted to Ps. 69.4 million plus compensatory interests. The outstanding balance of this credit has been valued at its
amortized cost and it has been included in Other non-current receivables.



| | f) | Others
| | -- | ------

In addition to the matters discussed above, the TGS is a part of to certain lawsuits and administrative proceedings arising in the ordinary course of business.



| | 10. | BALANCES AND TRANSACTIONS WITH RELATED COMPANIES
| | --- | ------------------------------------------------

Transactions with related parties are carried out in the ordinary course of business according to common practices. The
terms of these transactions are comparable to those offered by or obtained from unaffiliated parties.

Technical Assistance Agreement

Petrobras Argentina is TGSs technical operator, according to the approval of ENARGAS in June 2004, and subject to
the terms and conditions of the Technical Assistance Agreement which provides that Petrobras Argentina is in charge of providing services related to the operation and maintenance of the natural gas transportation system and related facilities and
equipment, to ensure that the performance of the system is in conformity with international standards and in compliance with certain environmental standards. For these services, the Company pays a monthly fee based on a percentage of the operating
income of the Company. In December 2011, TGS and Petrobras Argentina approved the renewal of the Technical Assistance Agreement for a three-year term, expiring in December 2014.

Commercial transactions

On September 24, 2013, The Board of Directors approved the agreement signed with Petrobras Argentina to transfer natural gas and richness to TGS, which will be in force since October 1, 2013 and
for one year. The price, which is denominated in US dollars, is determined according to common practices.

Moreover, TGS, under certain agreements, processes the natural gas in Cerri Complex and commercializes the liquids,
renders natural gas transportation services and other services to its related companies, mainly to Petroleo Brasileiro; Petrobras Global and Compañía Mega.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Financial transactions. Loan agreement with Pampa Energía.

On October 5, 2011, TGS granted a US$26 million loan to Pampa Energía. Proceeds from the loan were
used by Pampa Energía to exercise the option contained in the Call Option Agreement. Additionally, to guarantee compliance with its obligations, Pampa Energy created a pledge on the rights that correspond to the arbitration
actions of Ponderosa Assets LP and Enron Creditors Recovery Corp. against Argentine Government acquired upon exercise of the option mentioned above. For more information, see Note 16.a.

After several extensions of the maturity, on May 7, 2013, TGS ́s Board of Directors approved the amendments of
certain terms and conditions of the loan granted to Pampa Energía, among others:



| | i) | The expiration date will run on October 6, 2014, with option of an automatic renewal for one additional period of one year.
| | -- | ---------------------------------------------------------------------------------------------------------------------------



| | ii) | The loan must be paid or prepaid compulsorily by the assignment of rights and obligations to TGS of all assigned to Pampa Energía, mentioned
in Note 16.a, Ponderosa Assets LP and Enron Creditors Recovery Corp against Argentina in the event that, on or before the due date: (a) the 20% effective increase on the tariff schedule has been granted to TGS, under the provisions of the
Transitional Agreement approved by Presidential Decree No. 1918/09 or (b) it has been granted to TGS: (x) the tariff adjustment as provided by the Adjustment Agreement initialed by TGS approved by the Board of Directors Meeting held
on October 5, 2011, or (y) any other compensatory arrangements implemented by any mechanism or system of tariff revision in the future to replace those currently in force under the Public Emergency Law with an equivalent economic effect on
TGS.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii) | In all cases, the compensatory and punitive interest will be canceled or prepaid in free trade US dollars.
| | ---- | ----------------------------------------------------------------------------------------------------------



| | iv) | The current interest rate is equivalent to 6.8% annual plus VAT and, if the loan is extended, to the market rate to be determined for the next
annual period, counted from October 6, 2014 until the date of full payment of the amounts due under the loan.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

As of December 31, 2013, the loan granted to Pampa Energía was exposed in Other non-current investments However, as of December 31, 2012 and 2011, it was exposed in
Current investments.

Balances and transactions with related parties

The detail of significant outstanding balances for transactions entered into by TGS and its related parties as of
December 31, 2013, 2012 and 2011 is as follows:



|                                                 |  |                    |         |  |                 |  |        |                    |  |  |                 |  |  |                    |        |  |                 |  |         |  |  |  |        | 
|------------------------------------------------ |  | ------------------ | ------- |  | --------------- |  | ------ | ------------------ |  |  | --------------- |  |  | ------------------ | ------ |  | --------------- |  | ------- |  |  |  | ------ | 
|                                                 |  | 2013               |         |  | 2012            |  |        | 2011               | 
|                                                 |  |                    |         |  |                 |  |        | (non-audited)      |  |  | (non-audited)   | 
|Company                                          |  | Accountsreceivable |         |  | Accountspayable |  |        | Accountsreceivable |  |  | Accountspayable |  |  | Accountsreceivable |        |  | Accountspayable | 
|Affiliate which exercises joint control:         |  |                    |         |  |                 |  |        |                    |  |  |                 |  |  |                    |        |  |                 |  |         |  |  |  |        | 
|Petrobras Argentina                              |  |                    | 12,614  |  |                 |  | 25,176 |                    |  |  | 32,503          |  |  |                    | 18,907 |  |                 |  | 13,920  |  |  |  | 27,756 | 
|Affiliate which exercises significant influence: |  |                    |         |  |                 |  |        |                    |  |  |                 |  |  |                    |        |  |                 |  |         |  |  |  |        | 
|Pampa Energía                                    |  |                    | 194,154 |  |                 |  |       |                    |  |  | 138,523         |  |  |                    |       |  |                 |  | 112,640 |  |  |  |       | 
|Affiliates with significant influence:           |  |                    |         |  |                 |  |        |                    |  |  |                 |  |  |                    |        |  |                 |  |         |  |  |  |        | 
|Link                                             |  |                    | 223     |  |                 |  |       |                    |  |  | 184             |  |  |                    |       |  |                 |  | 334     |  |  |  |       | 
|TGU                                              |  |                    |        |  |                 |  |       |                    |  |  |                |  |  |                    |       |  |                 |  |        |  |  |  |       | 
|Other related companies:                         |  |                    |         |  |                 |  |        |                    |  |  |                 |  |  |                    |        |  |                 |  |         |  |  |  |        | 
|Petrobras Global                                 |  |                    |        |  |                 |  |       |                    |  |  | 89,835          |  |  |                    |       |  |                 |  |        |  |  |  |       | 
|Petroleo Brasileiro                              |  |                    | 39,573  |  |                 |  |       |                    |  |  | 47,020          |  |  |                    |       |  |                 |  | 38,628  |  |  |  |       | 
|PIFC                                             |  |                    |        |  |                 |  |       |                    |  |  |                |  |  |                    |       |  |                 |  |        |  |  |  |       | 
|Compañía Mega S.A.                               |  |                    | 5,357   |  |                 |  |       |                    |  |  | 3,765           |  |  |                    |       |  |                 |  | 3,197   |  |  |  |       | 
|Refinor S.A.                                     |  |                    |        |  |                 |  |       |                    |  |  |                |  |  |                    |       |  |                 |  | 409     |  |  |  |       | 
|WEB S.A.                                         |  |                    | 382     |  |                 |  |       |                    |  |  | 2,010           |  |  |                    |       |  |                 |  | 948     |  |  |  |       | 
|                                                 |  |                    |         |  |                 |  |        |                    |  |  |                 |  |  |                    |        |  |                 |  |         |  |  |  |        | 
|Total                                            |  |                    | 252,303 |  |                 |  | 25,176 |                    |  |  | 313,840         |  |  |                    | 18,907 |  |                 |  | 170,076 |  |  |  | 27,756 | 
|                                                 |  |                    |         |  |                 |  |        |                    |  |  |                 |  |  |                    |        |  |                 |  |         |  |  |  |        | 



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



The detail of significant transactions with related parties for the years ended
December 31, 2013, 2012 and 2011 is as follows:

Year ended December 31, 2013 (non-audited)



|                                                 |  |                           |        |  |                                           |  |         |                   |  |  |                       |  |  |                                     |         |  |               |  |        |                 |  |  |     |  |  |  |       | 
|------------------------------------------------ |  | ------------------------- | ------ |  | ----------------------------------------- |  | ------- | ----------------- |  |  | --------------------- |  |  | ----------------------------------- | ------- |  | ------------- |  | ------ | --------------- |  |  | --- |  |  |  | ----- | 
|                                                 |  | Revenues                  |        |  | Costs                                     |  |         | Financial Results | 
|Company                                          |  | Natural GasTransportation |        |  | Production andcommercializationof liquids |  |         | Otherservices     |  |  | Gaspurchaseand others |  |  | Compensationfor technicalassistance |         |  | Interestsloss |  |        | Interestsearned | 
|Affiliate which exercises joint control:         |  |                           |        |  |                                           |  |         |                   |  |  |                       |  |  |                                     |         |  |               |  |        |                 |  |  |     |  |  |  |       | 
|Petrobras Argentina                              |  |                           | 31,698 |  |                                           |  |        |                   |  |  | 34,924                |  |  |                                     | 147,977 |  |               |  | 52,953 |                 |  |  |    |  |  |  |      | 
|Affiliate which exercises significant influence: |  |                           |        |  |                                           |  |         |                   |  |  |                       |  |  |                                     |         |  |               |  |        |                 |  |  |     |  |  |  |       | 
|Pampa Energía                                    |  |                           |       |  |                                           |  |        |                   |  |  |                      |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  | 7,608 | 
|Affiliates with significant influence:           |  |                           |        |  |                                           |  |         |                   |  |  |                       |  |  |                                     |         |  |               |  |        |                 |  |  |     |  |  |  |       | 
|Link                                             |  |                           |       |  |                                           |  |        |                   |  |  | 1,995                 |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  |      | 
|EGS                                              |  |                           |       |  |                                           |  |        |                   |  |  | 47                    |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  |      | 
|Other related companies:                         |  |                           |        |  |                                           |  |         |                   |  |  |                       |  |  |                                     |         |  |               |  |        |                 |  |  |     |  |  |  |       | 
|Pampa Argentina S.A.                             |  |                           |       |  |                                           |  |        |                   |  |  |                      |  |  |                                     |        |  |               |  |       |                 |  |  | 130 |  |  |  |      | 
|Compañía Mega S.A.                               |  |                           | 764    |  |                                           |  | 43,080  |                   |  |  | 30                    |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  |      | 
|Refinor S.A.                                     |  |                           |       |  |                                           |  |        |                   |  |  |                      |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  |      | 
|WEB S.A.                                         |  |                           | 3,080  |  |                                           |  |        |                   |  |  |                      |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  |      | 
|Petroleo Brasileiro                              |  |                           |       |  |                                           |  | 343,150 |                   |  |  |                      |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  |      | 
|Petrobras Global                                 |  |                           |       |  |                                           |  | 373,791 |                   |  |  |                      |  |  |                                     |        |  |               |  |       |                 |  |  |    |  |  |  |      | 
|                                                 |  |                           |        |  |                                           |  |         |                   |  |  |                       |  |  |                                     |         |  |               |  |        |                 |  |  |     |  |  |  |       | 
|Total                                            |  |                           | 35,542 |  |                                           |  | 760,021 |                   |  |  | 36,949                |  |  |                                     | 147,977 |  |               |  | 52,953 |                 |  |  | 130 |  |  |  | 7,608 | 
|                                                 |  |                           |        |  |                                           |  |         |                   |  |  |                       |  |  |                                     |         |  |               |  |        |                 |  |  |     |  |  |  |       | 

Year ended December 31, 2012



|                                                 |  |                           |        |  |                                           |  |         |                  |  |  |                       |  |  |                                     |        |  |               |  |        |                |  |  |     |  |  |  |       | 
|------------------------------------------------ |  | ------------------------- | ------ |  | ----------------------------------------- |  | ------- | ---------------- |  |  | --------------------- |  |  | ----------------------------------- | ------ |  | ------------- |  | ------ | -------------- |  |  | --- |  |  |  | ----- | 
|                                                 |  | Revenues                  |        |  | Costs                                     |  |         | FinancialResults | 
|Company                                          |  | Natural GasTransportation |        |  | Production andcommercializationof
liquids |  |         | Otherservices    |  |  | Gaspurchaseand others |  |  | Compensationfor
technicalassistance |        |  | Interestsloss |  |        | Interestearned | 
|Affiliate which exercises joint control:         |  |                           |        |  |                                           |  |         |                  |  |  |                       |  |  |                                     |        |  |               |  |        |                |  |  |     |  |  |  |       | 
|Petrobras Argentina                              |  |                           | 32,360 |  |                                           |  | 22,846  |                  |  |  | 29,256                |  |  |                                     | 71,255 |  |               |  | 52,046 |                |  |  |    |  |  |  |      | 
|Affiliate which exercises significant influence: |  |                           |        |  |                                           |  |         |                  |  |  |                       |  |  |                                     |        |  |               |  |        |                |  |  |     |  |  |  |       | 
|Pampa Energía                                    |  |                           |       |  |                                           |  |        |                  |  |  |                      |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  | 6,665 | 
|Affiliates with significant influence:           |  |                           |        |  |                                           |  |         |                  |  |  |                       |  |  |                                     |        |  |               |  |        |                |  |  |     |  |  |  |       | 
|Link                                             |  |                           |       |  |                                           |  |        |                  |  |  | 1,737                 |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  |      | 
|EGS                                              |  |                           |       |  |                                           |  |        |                  |  |  | 47                    |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  |      | 
|Other related companies:                         |  |                           |        |  |                                           |  |         |                  |  |  |                       |  |  |                                     |        |  |               |  |        |                |  |  |     |  |  |  |       | 
|Inversiones Inversiones I                        |  |                           |       |  |                                           |  |        |                  |  |  |                      |  |  |                                     |       |  |               |  |       |                |  |  | 123 |  |  |  |      | 
|PIFC                                             |  |                           | 757    |  |                                           |  | 32,434  |                  |  |  | 1,371                 |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  |      | 
|Compañía Mega S.A.                               |  |                           |       |  |                                           |  |        |                  |  |  | 757                   |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  |      | 
|Refinor S.A.                                     |  |                           | 3,048  |  |                                           |  |        |                  |  |  |                      |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  |      | 
|WEB S.A.                                         |  |                           |       |  |                                           |  | 256,447 |                  |  |  |                      |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  |      | 
|Petroleo Brasileiro                              |  |                           |       |  |                                           |  | 487,314 |                  |  |  |                      |  |  |                                     |       |  |               |  |       |                |  |  |    |  |  |  |      | 
|                                                 |  |                           |        |  |                                           |  |         |                  |  |  |                       |  |  |                                     |        |  |               |  |        |                |  |  |     |  |  |  |       | 
|Total                                            |  |                           | 36,165 |  |                                           |  | 799,041 |                  |  |  | 33,168                |  |  |                                     | 71,255 |  |               |  | 52,046 |                |  |  | 123 |  |  |  | 6,665 | 
|                                                 |  |                           |        |  |                                           |  |         |                  |  |  |                       |  |  |                                     |        |  |               |  |        |                |  |  |     |  |  |  |       | 



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Year ended December 31, 2011 (non-audited):



|                                                 |  |                           |        |  |                                           |  |         |               |  |  |                       |  |  |                                     |       |  |  |  |        | 
|------------------------------------------------ |  | ------------------------- | ------ |  | ----------------------------------------- |  | ------- | ------------- |  |  | --------------------- |  |  | ----------------------------------- | ----- |  |  |  | ------ | 
|                                                 |  | Revenues                  |        |  | Costs                                     | 
|Company                                          |  | Natural GasTransportation |        |  | Production andcommercializationof
liquids |  |         | Otherservices |  |  | Gaspurchaseand others |  |  | Compensationfor
technicalassistance |      
|Affiliate which exercises joint control:         |  |                           |        |  |                                           |  |         |               |  |  |                       |  |  |                                     |       |  |  |  |        | 
|Petrobras Argentina                              |  |                           | 32,801 |  |                                           |  | 46,159  |               |  |  | 24,903                |  |  |                                     | 4,766 |  |  |  | 41,050 | 
|Affiliate which exercises significant influence: |  |                           |        |  |                                           |  |         |               |  |  |                       |  |  |                                     |       |  |  |  |        | 
|Pampa Energía                                    |  |                           |       |  |                                           |  |        |               |  |  |                      |  |  |                                     |      |  |  |  |       | 
|Affiliates with significant influence:           |  |                           |        |  |                                           |  |         |               |  |  |                       |  |  |                                     |       |  |  |  |        | 
|Link                                             |  |                           |       |  |                                           |  |        |               |  |  | 1,661                 |  |  |                                     |      |  |  |  |       | 
|EGS                                              |  |                           |       |  |                                           |  |        |               |  |  | 66                    |  |  |                                     |      |  |  |  |       | 
|Other related companies:                         |  |                           |        |  |                                           |  |         |               |  |  |                       |  |  |                                     |       |  |  |  |        | 
|PIFC                                             |  |                           |       |  |                                           |  |        |               |  |  |                      |  |  |                                     |      |  |  |  |       | 
|Compañía Mega S.A.                               |  |                           |       |  |                                           |  | 9,332   |               |  |  |                      |  |  |                                     |      |  |  |  |       | 
|Refinor S.A.                                     |  |                           | 752    |  |                                           |  | 32,630  |               |  |  | 2,270                 |  |  |                                     |      |  |  |  |       | 
|WEB S.A.                                         |  |                           |       |  |                                           |  |        |               |  |  | 1,939                 |  |  |                                     |      |  |  |  |       | 
|Petroleo Brasileiro                              |  |                           | 3,021  |  |                                           |  |        |               |  |  |                      |  |  |                                     |      |  |  |  |       | 
|Ärea Santa Cruz II U.T.E.                        |  |                           |       |  |                                           |  | 195,094 |               |  |  |                      |  |  |                                     |      |  |  |  |       | 
|                                                 |  |                           |        |  |                                           |  |         |               |  |  |                       |  |  |                                     |       |  |  |  |        | 
|Total                                            |  |                           | 36,574 |  |                                           |  | 283,215 |               |  |  | 30,839                |  |  |                                     | 4,766 |  |  |  | 41,050 | 
|                                                 |  |                           |        |  |                                           |  |         |               |  |  |                       |  |  |                                     |       |  |  |  |        | 



|11. | SUBSIDIARY AND AFFILIATES
|--- | -------------------------

Telcosur:

The corporate purpose of Telcosur is to render telecommunication
services. Telcosur was created to assure the optimal utilization of TGSs telecommunication system. TGSs equity interest in the company is 99.98% and the remaining 0.02% is held by Petrobras Energía Internacional S.A.

Link:

Link was created
in February 2001, with the purpose of the operation of a natural gas transportation system, which links TGSs natural gas transportation system with the Cruz del Sur S.A. pipeline. The connection pipeline extends from Buchanan, located in the
high-pressure ring that surrounds the city of Buenos Aires, which is part of TGSs pipeline system, to Punta Lara. TGSs ownership interest in such company is 49% and Dinarel S.A. holds the remaining 51%.

TGU:

TGU is a company
incorporated in Uruguay. This company rendered operation and maintenance services to Gasoducto Cruz del Sur S.A. and its contract terminated in 2010. TGS holds 49% of its common stock and Petrobras Argentina holds the remaining 51%.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



EGS:

In September 2003, EGS, a company registered in Argentina, was incorporated. The ownership is distributed between TGS (49%) and TGU (51%). EGS operates its own pipeline, which connects TGSs
main pipeline system in the Province of Santa Cruz with a delivery point on the border with Chile.

In October 2012, ENARGAS
issued a resolution which authorizes EGS to transfer the connection pipeline and service offerings in operation to TGS. On December 17, 2013 the sale of all the fixed assets of EGS to TGS for an amount of US$ 350,000 was made.



|12. | SUBSEQUENT EVENTS
|--- | -----------------

The financial statements were authorized for issuance by the Board on February 11, 2014.

No subsequent events between the end of the fiscal year ended December 31, 2013 and the date of the issuance (authorization) of these consolidated financial statements have had a material effect on
the financial position or the results of operations of the Company, except for the mentioned below:

Exchange Offer

In order to improve the maturity profile of TGSs financial debt, in January 2014 the Company
launched an offer for a voluntary exchange of the 2007 Notes. To this end, on January 3, 2014, the CNV issued Resolution No. 17,262.

On January 10, 2014, TGS launched an exchange offer for the Series I notes created under the Global Program 2007 to its creditors. The terms of issuance of the new notes do not change financial
restrictions on those in force for Series I notes created under the Global Program 2007 (for more information see note 12).

The period of acceptance of this offer expired on February 7, 2014. Considering the percentage of acceptance received which amounted to 67%, the financial debt of the Company was comprised as
follows:



|                              |  |                                                          |  |                                                          |  |                       |  |                                      
|----------------------------- |  | -------------------------------------------------------- |  | -------------------------------------------------------- |  | --------------------- |  | -------------------------------------
|                              |  | Series I Global Program 2007 Notes                       |  | Series I Global Program 2014 Notes                      
|Amount in US$                 |  | 123,283,000                                              |  | 255,451,506                                             
|Interest Rate                 |  | 7.875% annual                                            |  | 9.625% annual                                           
|                              |  |                                                          |  |                                                         
|Amortization                  |  | ScheduledPayment Date                                    |  | Percentage ofOriginalPrincipal Amount                    |  | ScheduledPayment Date |  | Percentage ofOriginalPrincipal Amount
|                              |  | May 14, 2014                                             |  | 25%                                                      |  | May 14, 2014          |  | 25%                                  
|                              |  | May 14, 2015                                             |  | 25%                                                      |  | May 14, 2018          |  | 25%                                  
|                              |  | May 14, 2016                                             |  | 25%                                                      |  | May 14, 2019          |  | 25%                                  
|                              |  | May 14, 2017                                             |  | 25%                                                      |  | May 14, 2020          |  | 25%                                  
|Frequency of Interest Payment |  | Semiannual, payable May 14 and November 14 of each year. |  | Semiannual, payable May 14 and November 14 of each year.
|Guarantor                     |  | None                                                     |  | None                                                    

Transitory tariff increase

On April 7, 2014, the ENARGAS issued Resolution No. I-2852 (the Resolution No. I-2852). It published the
new rate schedules authorizing an increase to the rate applicable to the natural gas firm and interruptible transportation rates. The increase in the rate is set forth in three stages, as follows: 8% from April 1, 2014, 5.5% from June 1,
2014 and 5.3% from August 1, 2014, reaching from August 1, 2014, a cumulative increase of 20%.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Additionally, in line with 2008 Transitional Agreement, according to
Resolution No. I-2852, the funds generated by this tariff increase would be temporarily deposited in a trust fund for the payment of maintenance works according to an investment plan submitted by us and previously approved by the ENARGAS. According
to Resolution No. I-2852, at least 5% of the proceeds of the transitional rate adjustment must be deposited in the trust fund, the remaining balance of the increase will be managed by us for the fulfillment of that investment plan.

However this is only a partial implementation of the 2008 Transitional Agreement. According to its terms, the 2008
Transitional Agreement will be in force under the terms of the Presidential Decree No. 1,918/09 until the effective date of the integral license renegotiation agreement to be signed with the Government. The Company will continue performing all
the legal actions began to obtain the complete enforcement of the 2008 Transitional Agreement.



|13. | SUMMARY OF SIGNIFICANT QUALITATIVE DIFFERENCES BETWEEN ARGENTINE GAAP AND US GAAP
|--- | ---------------------------------------------------------------------------------

The consolidated financial statements of CIESA have been prepared in accordance with Argentine GAAP, which differs in
certain significant respects from US GAAP. Such differences involve methods of measuring the amounts shown in the consolidated financial statements, as well as additional disclosures required by US GAAP and Regulation S-X of the SEC.

The following summary describes the principal measurement differences, other than inflation accounting, and
disclosure differences, between Argentine GAAP and US GAAP as they relate to the Company.



| | a) | Capitalization of interest costs
| | -- | --------------------------------

Under Argentine GAAP, the Company capitalizes financial costs comprising interest and exchange differences.

Under US GAAP, Accounting Standards Codification (ASC) 835, Interest, requires interest capitalization on eligible assets, which have a period of time to get them ready for
their intended use. Capitalization of foreign exchange differences is not allowed.

This difference leads to
lower depreciation charges under US GAAP.



| | b) | Capitalization of foreign exchange differences
| | -- | ----------------------------------------------

Under Argentine GAAP, the Company capitalized foreign exchange losses derived from the devaluation of the Argentine Peso
as from January 6, 2002 to July 28, 2003. Capitalization of foreign exchange losses is not allowed under US GAAP.

This difference leads to lower depreciation charges under US GAAP.



| | c) | Present value accounting of other tax receivables
| | -- | -------------------------------------------------

Under Argentine GAAP, long term tax receivables and (except for deferred tax assets and liabilities) are measured based on
their best estimate of the present value of amounts expected to be collected or paid, as applicable. Under US GAAP, present valuing or discounting of these tax assets is not permitted.

This difference leads to lower financial expenses under US GAAP.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



| | d) | Present value accounting of accounts receivable
| | -- | -----------------------------------------------

Under Argentine GAAP, certain receivables are measured based on their best possible estimate of the present value of
amounts expected to be collected using an estimated rate at the time of the initial measurement.

Under
US GAAP, as of December 31, 2012 and 2011 receivables arising from transactions with customers in the normal course of business, under customary trade terms not exceeding one year, are generally accounted for at their nominal value,
including accrued interest, if applicable.



| | e) | Accounting for current investments
| | -- | ----------------------------------

Under Argentine GAAP, investments in mutual funds are measured at fair value. Unrealized gains and losses for changes in
fair value are included in the statement of income in the period in which they are incurred.

Under
US GAAP, in accordance with ASC 320 InvestmentsDebt and Equity Securities, these investments would be classified as available for sale. Available for sale investments are valued at fair value with unrealized changes in fair
value recognized in other comprehensive income in the period in which they are incurred.



| | f) | Non-current investments in unconsolidated affiliated companies
| | -- | --------------------------------------------------------------

Under both Argentine GAAP and US GAAP, two investments in companies where the Company has significant influence but
not control are accounted for under the equity method of accounting. However, under US GAAP, the Company would adjust the Argentine GAAP balances to US GAAP prior to equity account for the investments. Some of the principal differences
relate to (i) the reversal of capitalized foreign exchange differences; (ii) the reversal of discounting of certain tax receivables and (iii) the recognition of deferred income taxes on the US GAAP adjustments.



| | g) | Valuation of property, plant and equipment
| | -- | ------------------------------------------

The Company acquired its subsidiary TGS as result of the privatization of Gas del Estado assets, a state-owned company
owned by the Argentine Government. The Company paid a portion of the purchase price of 70% of TGSs shares through the surrender of bonds issued by the Argentine Government. Under both Argentine GAAP and US GAAP, the initial carrying value
of TGSs net assets was based on the purchase price paid for the shares. However, under Argentine GAAP, the Company based its computation of the purchase price of the shares on a value of the surrendered bonds established by the Argentine
Government. On the contrary, under US GAAP, the Company based this computation on the fair value of those bonds, which was less than their established value. Therefore, the initial carrying value of TGSs net assets determined under
US GAAP was lower than that determined under Argentine GAAP. Accordingly, this difference gives raise to differences in depreciation expense.

In addition, under Argentine GAAP, the subsidiary capitalized certain cancellation costs of assumed commitments and other costs as intangible assets and amortized them under the straight-line basis until
December, 31, 2005.

Under US GAAP, the Company would have followed APB 16 at the time of the acquisition
and would have considered those costs as adjustments to the purchase price paid for the shares. Therefore, under US GAAP, these costs would have been assigned to the cost of the fixed assets transferred, thus reclassifying from these costs from
intangible assets. These costs would have followed the depreciation pattern of the respective fixed assets where the costs would have been assigned.

Therefore, the net effect of the US GAAP adjustment would be the reversal of the amortization expense of the intangible assets and the recognition of a higher depreciation expense for fixed assets.

Moreover, following the guidance in APB 16, as the Company acquired 70% of the stock of TGS, the fixed assets
transferred would have valued at the price effectively paid for the 70%. The remaining 30% would have been valued at the historical cost of the assets as carried in Gas del Estado books adjusted for inflation in accordance with Argentine GAAP.



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COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2013, 2012 AND 2011

(Amounts stated in thousands of
Argentine pesos as described in Note 2.c,

except for per share and per ADS amounts in Argentine pesos or unless
otherwise indicated)



Since Gas del Estado did not maintain separate records for its gas
transportation business including TGS, it was impossible to reconstruct historical cost. However, the Company believes that the fair value of the transferred assets recorded in its books was significantly lower than the Gas del Estado book values
restated for inflation at the date of acquisition. Consequently, no adjustment would have been recorded for the valuation of fixed assets of TGS under US GAAP.



| | h) | Effect of the US GAAP adjustments on the Deferred income tax and Minority Interest
| | -- | ----------------------------------------------------------------------------------

All of the previous US GAAP differences would have a corresponding deferred income tax effect. Additionally, the
amount of minority interest would have a corresponding adjustment for the effect of the foregoing US GAAP adjustments.



Ricardo I. MongeBoard of Directors Chairman




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EXHIBIT A

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED BALANCE
SHEETS AS OF DECEMBER 31, 2013, 2012 AND 2011

PROPERTY, PLANT AND EQUIPMENT, NET

(In thousands of Argentine pesos as described in Note 2.c.)



|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |                |         |   |                                       |  |           |             |  |  |             |  |  |        |        |  |                                   |  |         |            |  |  |               |  |  |               |           |  |               |  |        |     |  |  |           |  |  |  |           |  |  |  |           | 
|------------------------------------------------------------------ |  | ------------------- | --------- |  | ------------ |  | ------- | ----------- |  |  | --------- |  |  | -------------- | ------- | - | ------------------------------------- |  | --------- | ----------- |  |  | ----------- |  |  | ------ | ------ |  | --------------------------------- |  | ------- | ---------- |  |  | ------------- |  |  | ------------- | --------- |  | ------------- |  | ------ | --- |  |  | --------- |  |  |  | --------- |  |  |  | --------- | 
|                                                                   |  | 2013                |           |  | 2012         |  |         | 2011        | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |                |         |   | (non-audited)                         |  |           |             |  |  |             |  |  |        |        |  |                                   |  |         |            |  |  |               |  |  |               |           |  | (non-audited) | 
|                                                                   |  | Cost                |           |  | Depreciation |  |         |             |  |  |           |  |  |                |         |   |                                       | 
|Main Account                                                       |  | Beginningof theyear |           |  | Additions    |  |         | Retirements |  |  | Transfers |  |  | End ofthe year |         |   | Accumulatedat thebeginning ofthe year |  |           | Retirements |  |  | For theyear |  |  | Rate % |        |  | Accumulatedat the end 
ofthe year |  |         | Impairment |  |  | Net bookvalue |  |  | Net bookvalue |           |  | Net bookvalue | 
|Pipelines                                                          |  |                     | 3,583,938 |  |              |  | 2,210   |             |  |  |          |  |  |                | 26,129  |   |                                       |  | 3,612,277 |             |  |  | 1,263,152   |  |  |        |       |  |                                   |  | 85,499  |            |  |  | (1) 2.2       |  |  |               | 1,348,651 |  |               |  |       |     |  |  | 2,263,626 |  |  |  | 2,320,786 |  |  |  | 2,382,904 | 
|Compressor plants                                                  |  |                     | 1,322,490 |  |              |  |        |             |  |  |          |  |  |                | 31,596  |   |                                       |  | 1,354,086 |             |  |  | 699,420     |  |  |        |       |  |                                   |  | 62,852  |            |  |  | (1) 3.3 to 25 |  |  |               | 762,272   |  |               |  |       |     |  |  | 591,814   |  |  |  | 623,070   |  |  |  | 613,979   | 
|Other industrial plants                                            |  |                     | 2,868     |  |              |  |        |             |  |  |          |  |  |                |        |   |                                       |  | 2,868     |             |  |  | 260         |  |  |        |       |  |                                   |  | 98      |            |  |  | (1) 3.3       |  |  |               | 358       |  |               |  |       |     |  |  | 2,510     |  |  |  | 2,608     |  |  |  | 836       | 
|Stations of regulation and/or measurement of pressure              |  |                     | 124,787   |  |              |  |        |             |  |  |          |  |  |                | 1,616   |   |                                       |  | 126,403   |             |  |  | 72,504      |  |  |        |       |  |                                   |  | 5,136   |            |  |  | (1) 4         |  |  |               | 77,640    |  |               |  |       |     |  |  | 48,763    |  |  |  | 52,283    |  |  |  | 55,171    | 
|Other technical installations                                      |  |                     | 28,342    |  |              |  |        |             |  |  |          |  |  |                |        |   |                                       |  | 28,342    |             |  |  | 18,019      |  |  |        |       |  |                                   |  | 1,008   |            |  |  | (1) 6.7       |  |  |               | 19,027    |  |               |  |       |     |  |  | 9,315     |  |  |  | 10,323    |  |  |  | 6,883     | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |                |         |   |                                       |  |           |             |  |  |             |  |  |        |        |  |                                   |  |         |            |  |  |               |  |  |               |           |  |               |  |        |     |  |  |           |  |  |  |           |  |  |  |           | 
|Subtotal assets related to gas transportation service              |  |                     | 5,062,425 |  |              |  | 2,210   |             |  |  |          |  |  |                | 59,341  |   |                                       |  | 5,123,976 |             |  |  | 2,053,355   |  |  |        |       |  |                                   |  | 154,593 |            |  |  |              |  |  |               | 2,207,948 |  |               |  |       |     |  |  | 2,916,028 |  |  |  | 3,009,070 |  |  |  | 3,059,773 | 
|Assets related to gas upstream service                             |  |                     | 198,378   |  |              |  |        |             |  |  | 665       |  |  |                | 7,371   |   |                                       |  | 205,084   |             |  |  | 95,959      |  |  |        | 147    |  |                                   |  | 7,857   |            |  |  | 2.2 to 25     |  |  |               | 103,669   |  |               |  |       |     |  |  | 101,415   |  |  |  | 102,419   |  |  |  | 38,812    | 
|Assets related to liquids production and commercialization service |  |                     | 648,348   |  |              |  |        |             |  |  |          |  |  |                | 28,763  |   |                                       |  | 677,111   |             |  |  | 441,704     |  |  |        |       |  |                                   |  | 41,902  |            |  |  | (1) 5.9       |  |  |               | 483,606   |  |               |  |       |     |  |  | 193,505   |  |  |  | 206,644   |  |  |  | 221,276   | 
|Lands                                                              |  |                     | 6,279     |  |              |  |        |             |  |  |          |  |  |                |        |   |                                       |  | 6,279     |             |  |  |            |  |  |        |       |  |                                   |  |        |            |  |  |              |  |  |               |          |  |               |  |       |     |  |  | 6,279     |  |  |  | 6,279     |  |  |  | 5,637     | 
|Buildings and constructions                                        |  |                     | 182,031   |  |              |  |        |             |  |  |          |  |  |                | 2,634   |   |                                       |  | 184,665   |             |  |  | 88,937      |  |  |        |       |  |                                   |  | 4,261   |            |  |  | 2             |  |  |               | 93,198    |  |               |  |       |     |  |  | 91,467    |  |  |  | 93,094    |  |  |  | 93,572    | 
|Fittings and fixtures in buildings                                 |  |                     | 5,692     |  |              |  |        |             |  |  |          |  |  |                |        |   |                                       |  | 5,692     |             |  |  | 3,242       |  |  |        |       |  |                                   |  | 297     |            |  |  | 4             |  |  |               | 3,539     |  |               |  |       |     |  |  | 2,153     |  |  |  | 2,450     |  |  |  | 2,604     | 
|Machinery, equipment and tools                                     |  |                     | 39,034    |  |              |  | 1,752   |             |  |  |          |  |  |                | 2,250   |   |                                       |  | 43,036    |             |  |  | 33,596      |  |  |        |       |  |                                   |  | 1,345   |            |  |  | 6.7 to 20     |  |  |               | 34,941    |  |               |  |       |     |  |  | 8,095     |  |  |  | 5,438     |  |  |  | 5,687     | 
|Computers and telecommunication systems                            |  |                     | 343,322   |  |              |  |        |             |  |  |          |  |  |                | 20,052  |   |                                       |  | 363,374   |             |  |  | 241,719     |  |  |        |       |  |                                   |  | 22,716  |            |  |  | 6.7 to 20     |  |  |               | 264,435   |  |               |  |       |     |  |  | 98,939    |  |  |  | 101,603   |  |  |  | 102,550   | 
|Vehicles                                                           |  |                     | 24,621    |  |              |  | 3,599   |             |  |  | 98        |  |  |                |        |   |                                       |  | 28,122    |             |  |  | 16,987      |  |  |        | 98     |  |                                   |  | 2,321   |            |  |  | 10 and 20     |  |  |               | 19,210    |  |               |  |       |     |  |  | 8,912     |  |  |  | 7,634     |  |  |  | 4,686     | 
|Furniture                                                          |  |                     | 13,122    |  |              |  | 9       |             |  |  |          |  |  |                | 16      |   |                                       |  | 13,147    |             |  |  | 12,541      |  |  |        |       |  |                                   |  | 104     |            |  |  | 10            |  |  |               | 12,645    |  |               |  |       |     |  |  | 502       |  |  |  | 581       |  |  |  | 701       | 
|Capitalization of foreign exchange loss (1)                        |  |                     | 177,272   |  |              |  |        |             |  |  |          |  |  |                |        |   |                                       |  | 177,272   |             |  |  | 83,712      |  |  |        |       |  |                                   |  | 7,521   |            |  |  | (1) 4.2       |  |  |               | 91,233    |  |               |  |       |     |  |  | 86,039    |  |  |  | 93,560    |  |  |  | 101,081   | 
|Materials                                                          |  |                     | 176,850   |  |              |  | 104,125 |             |  |  | 3,373     |  |  |                | (50,901 | ) |                                       |  | 226,701   |             |  |  |            |  |  |        |       |  |                                   |  |        |            |  |  |              |  |  |               |          |  |               |  |       |     |  |  | 226,701   |  |  |  | 176,850   |  |  |  | 148,203   | 
|Line pack                                                          |  |                     | 13,872    |  |              |  |        |             |  |  |          |  |  |                |        |   |                                       |  | 13,872    |             |  |  | 1,618       |  |  |        |       |  |                                   |  |        |            |  |  |              |  |  |               | 1,618     |  |               |  |       |     |  |  | 12,254    |  |  |  | 12,254    |  |  |  | 12,254    | 
|Works in progress                                                  |  |                     | 140,287   |  |              |  | 153,990 |             |  |  |          |  |  |                | (69,526 | ) |                                       |  | 224,751   |             |  |  |            |  |  |        |       |  |                                   |  |        |            |  |  |              |  |  |               |          |  |               |  |       |     |  |  | 224,751   |  |  |  | 140,287   |  |  |  | 186,617   | 
|Advances to suppliers of property, plant and equipment             |  |                     | 42,356    |  |              |  |        |             |  |  | 2,424     |  |  |                |        |   |                                       |  | 39,932    |             |  |  |            |  |  |        |       |  |                                   |  |        |            |  |  |              |  |  |               |          |  |               |  |       |     |  |  | 39,932    |  |  |  | 42,356    |  |  |  | 29,103    | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |                |         |   |                                       |  |           |             |  |  |             |  |  |        |        |  |                                   |  |         |            |  |  |               |  |  |               |           |  |               |  |        |     |  |  |           |  |  |  |           |  |  |  |           | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |               
|Total 2013                                                         |  |                     | 7,073,889 |  |              |  | 265,685 |             |  |  | 6,560     |  |  |                |        |   |                                       |  | 7,333,014 |             |  |  | 3,073,370   |  |  |        | 245    |  |                                   |  | 242,917 |            |  |  |               |  |  |               | 3,316,042 |  |               |  |       |     |  |  | 4,016,972 |  |  |  |           |  |  |  |           | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |                |         |   |                                       |  |           |             |  |  |             |  |  |        |        |  |                                   |  |         |            |  |  |               |  |  |               |           |  |               |  |        |     |  |  |           |  |  |  |           |  |  |  |           | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |               
|Total 2012                                                         |  |                     | 6,887,221 |  |              |  | 224,329 |             |  |  | 37,661    |  |  |                |        |   |                                       |  | 7,073,889 |             |  |  | 2,855,065   |  |  |        | 15,365 |  |                                   |  | 233,670 |            |  |  |               |  |  |               | 3,073,370 |  |               |  |       |     |  |  |           |  |  |  | 4,000,519 |  |  |  |           | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |                |         |   |                                       |  |           |             |  |  |             |  |  |        |        |  |                                   |  |         |            |  |  |               |  |  |               |           |  |               |  |        |     |  |  |           |  |  |  |           |  |  |  |           | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |               
|Total 2011                                                         |  |                     | 6,719,974 |  |              |  | 177,177 |             |  |  | 9,930     |  |  |                |        |   |                                       |  | 6,887,221 |             |  |  | 2,641,152   |  |  |        | 6,475  |  |                                   |  | 220,388 |            |  |  |               |  |  |               | 2,855,065 |  |               |  | 19,600 | (2) |  |  |           |  |  |  |           |  |  |  | 4,012,556 | 
|                                                                   |  |                     |           |  |              |  |         |             |  |  |           |  |  |                |         |   |                                       |  |           |             |  |  |             |  |  |        |        |  |                                   |  |         |            |  |  |               |  |  |               |           |  |               |  |        |     |  |  |           |  |  |  |           |  |  |  |           | 



|(1) | See Note 2.i).
|--- | --------------

|(2) | Corresponding to the impairment of obsolete turbines, Enargas authorized its retirement on November 1, 2012
|--- | -----------------------------------------------------------------------------------------------------------



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EXHIBIT C

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED
BALANCE SHEETS AS OF DECEMBER 31, 2013, 2012 AND 2011

NON-CURRENT INVESTMENTS

(In thousands of Argentine pesos, as described in Note 2.c.)



|                                              |  |                           |  |        |         |  |                                     |      |     |            |  |  |                    |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  |         |     |  |  |         |    
|--------------------------------------------- |  | ------------------------- |  | ------ | ------- |  | ----------------------------------- | ---- | --- | ---------- |  |  | ------------------ | ---- | ---- | -------------------------------------------- |  | ----------- | ---------- |  | --------------------------------- |  | ----- | ------------------- |  |  | ---------------- | - |  | ------------- | ----- |  | ------------- |  | ----- |  |  |  | ------- | --- |  |  | ------- | ---
|                                              |  | 2013                      |  |        | 2012    |  |                                     | 2011 |    
|                                              |  |                           |  |        |         |  |                                     |      |     |            |  |  |                    |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  | (non-audited) |       |  | (non-audited) | 
|                                              |  |                           |  |        |         |  |                                     |      |     |            |  |  | Issuer information |      |      |                                              |  |             |            | 
|                                              |  | Description of securities |  |        |         |  | Lastest financial statements issued |      |     |            |  |  |                    |      |      |                                              | 
|Name and issuer                               |  | Facevalue                 |  | Amount |         |  | Cost                                |      |     | Book value |  |  | Main
business      |      | Date |                                              |  | Commonstock |            |  | Net (loss) /income for 
theperiod |  |       | Shareholdersequity |  |  | % of CommonStock |   |  | Book value    |       |  | Book value    | 
|Transporte y Servicios de Gas en Uruguay S.A. |  | Uruguayanpeso 1           |  |        | 196,000 |  |                                     |      | 5   |            |  |  | 1,667              |      |      | Pipeline Maintenance                         |  |             | 09/30/2013 |  |                                   |  | 28    |                     |  |  | 139              |   |  |               | 3,403 |  |               |  | 49.00 |  |  |  | 1,528   |     |  |  | 1,328   |    
|                                              |  |                           |  |        |         |  |                                     |      |     |            |  |  |                    |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  |         |     |  |  | 58,453  |    
|Goodwill (2)                                  |  |                           |  |        |         |  |                                     |      |     |            |  |  | 58,453             |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  | 58,453  |     |  |  |         |    
|Goodwill Amortization (2)                     |  |                           |  |        |         |  |                                     |      |     |            |  |  | (29,688            | )    |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  | (27,440 | )   |  |  | (22,482 | )  
|Emprendimientos de Gas del Sur S.A.           |  | Ps.1                      |  |        | 116,130 |  |                                     |      | 116 |            |  |  | 1,929              |      |      | Pipeline construction and operation services |  |             | 09/30/2013 |  |                                   |  | 237   |                     |  |  | 239              |   |  |               | 3,937 |  |               |  | 49.00 |  |  |  | 1,690   |     |  |  | 1,498   |    
|                                              |  |                           |  |        |         |  |                                     |      |     |            |  |  |                    |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  |         |     |  |  |         |    
|Subtotal                                      |  |                           |  |        |         |  |                                     |      |     |            |  |  | 32,361             |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  |         |     |  |  |         |    
|Gas Link S.A.                                 |  | Ps.1                      |  |        | 502,962 |  |                                     |      | 503 |            |  |  | (801               | )(2) |      | Pipeline construction and operation services |  |             | 09/30/2013 |  |                                   |  | 1,026 |                     |  |  | (894             | ) |  |               | 5,165 |  |               |  | 49.00 |  |  |  | 93      | (1) |  |  | 395     | (1)
|                                              |  |                           |  |        |         |  |                                     |      |     |            |  |  |                    |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  |         |     |  |  |         |    
|Total                                         |  |                           |  |        |         |  |                                     |      |     |            |  |  | 31,560             |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  | 34,324  |     |  |  | 39,192  |    
|                                              |  |                           |  |        |         |  |                                     |      |     |            |  |  |                    |      |      |                                              |  |             |            |  |                                   |  |       |                     |  |  |                  |   |  |               |       |  |               |  |       |  |  |  |         |     |  |  |         |    



|(1) | Includes the elimination of intercompany profits. See Note 2.h).
|--- | ----------------------------------------------------------------

|(2) | Included in Other current liabilities.
|--- | ----------------------------------------

|(3) | Corresponds to the capitalization of foreign exchange difference.
|--- | -----------------------------------------------------------------



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##### Table of Contents

EXHIBIT D

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED
BALANCE SHEETS AS OF DECEMBER 31, 2013, 2012 AND 2011

CURRENT INVESTMENTS

(In thousands of Argentine pesos as described in Note 2.c.)



|                                                               |  |               |           |  |      |  |         |               |  |  |         | 
|-------------------------------------------------------------- |  | ------------- | --------- |  | ---- |  | ------- | ------------- |  |  | ------- | 
|                                                               |  | 2013          |           |  | 2012 |  |         | 2011          | 
|                                                               |  | (non-audited) |           |  |      |  |         | (non-audited) | 
|Mutual funds in local currency                                 |  |               | 228,817   |  |      |  | 60,286  |               |  |  | 22,876  | 
|Mutual funds in foreign currency                               |  |               |          |  |      |  |        |               |  |  | 562,905 | 
|Public Bonds                                                   |  |               | 112,100   |  |      |  |        |               |  |  |        | 
|Bank accounts in foreign currency                              |  |               | 551       |  |      |  | 58,905  |               |  |  | 68,439  | 
|Time deposits in local currency                                |  |               | 778,218   |  |      |  | 463,509 |               |  |  |        | 
|Time deposits in foreign currency                              |  |               |          |  |      |  | 23,350  |               |  |  | 21,370  | 
|Loans granted to related parties in foreign currency (Note 10) |  |               |          |  |      |  | 138,523 |               |  |  | 112,640 | 
|                                                               |  |               |           |  |      |  |         |               |  |  |         | 
|Total current investments                                      |  |               | 1,119,686 |  |      |  | 744,573 |               |  |  | 788,230 | 
|                                                               |  |               |           |  |      |  |         |               |  |  |         | 



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EXHIBIT E

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED
BALANCE SHEETS AS OF DECEMBER 31, 2013, 2012 AND 2011

ALLOWANCES AND PROVISIONS FOR CONTINGENCIES

(In thousands of Argentine pesos as described in Note 2.c)



|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|--------------------------------- |  |  | ---- |  | -------------------- |  | ------- | --------- |  |  | ------------ | --- |  | --------- | ------ |  | -------------- |  | ------- | --- |  |  | ------- | 
|Main account                      |  |  |      |  | Beginningof the year |  |         | Additions |  |  | Applications |     |  | Decreases |        |  | End ofthe year | 
|                                  |  |  |      |  | (non-audited)        |  |         |           |  |  |              |     |  |           |        |  |                | 
|Deducted from assets              |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  |      |  |                      | 
|Allowance for doubtful accounts   |  |  | 2013 |  |                      |  | 31,300  |           |  |  |             |     |  |           | 8,892  |  |                |  | 18,287  | (3) |  |  | 4,121   | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  | 2012 |  |                      |  | 31,173  |           |  |  | 127          | (1) |  |           |       |  |                |  |        |     |  |  | 31,300  | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  | 2011 |  |                      |  | 27,892  |           |  |  | 3,281        | (1) |  |           |       |  |                |  |        |     |  |  | 31,173  | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  |      |  |                      | 
|Allowance for deferred tax assets |  |  | 2013 |  |                      |  |        |           |  |  | 10,675       | (4) |  |           |       |  |                |  |        |     |  |  | 10,675  | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  | 2012 |  |                      |  |        |           |  |  |             |     |  |           |       |  |                |  |        |     |  |  |        | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  | 2011 |  |                      |  | 213,421 |           |  |  |             |     |  |           |       |  |                |  | 213,421 |     |  |  |        | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|Included in liabilities           |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  |      |  |                      | 
|Provision for contingencies       |  |  | 2013 |  |                      |  | 144,054 |           |  |  | 27,939       | (2) |  |           | 18,547 |  |                |  | 10,034  | (3) |  |  | 143,412 | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  | 2012 |  |                      |  | 130,764 |           |  |  | 15,982       | (3) |  |           | 84     |  |                |  | 2,608   | (3) |  |  | 144,054 | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 
|                                  |  |  | 2011 |  |                      |  | 106,922 |           |  |  | 25,772       | (3) |  |           | 1,093  |  |                |  | 837     | (3) |  |  | 130,764 | 
|                                  |  |  |      |  |                      |  |         |           |  |  |              |     |  |           |        |  |                |  |         |     |  |  |         | 



|(1) | Included in Selling expenses
|--- | ------------------------------

|(2) | Ps. 11,405 included in Other expense, net and Ps. 16,534 included in Financial expenses.
|--- | --------------------------------------------------------------------------------------------

|(3) | Included in Other expense, net.
|--- | ---------------------------------

|(4) | Included in Income tax expense.
|--- | ---------------------------------



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##### Table of Contents

EXHIBIT F

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

COST OF SALES FOR
THE YEARS

ENDED DECEMBER 31, 2013, 2012 AND 2011

(In thousands of Argentine pesos as described in Note 2.c.)



|                                         |  |               |           |   |      |  |           |               |  |  |         |  
|---------------------------------------- |  | ------------- | --------- | - | ---- |  | --------- | ------------- |  |  | ------- | -
|                                         |  | 2013          |           |   | 2012 |  |           | 2011          | 
|                                         |  | (non-audited) |           |   |      |  |           | (non-audited) | 
|Inventories at the beginning of the year |  |               | 54,282    |   |      |  | 7,588     |               |  |  | 12,911  |  
|Natural gas purchases                    |  |               | 744,249   |   |      |  | 681,768   |               |  |  | 319,417 |  
|Operating costs (Exhibit H)              |  |               | 804,144   |   |      |  | 716,660   |               |  |  | 612,246 |  
|Inventories at the end of the year       |  |               | (7,356    | ) |      |  | (54,282   | )             |  |  | (7,588  | )
|                                         |  |               |           |   |      |  |           |               |  |  |         |  
|Cost of sales                            |  |               | 1,595,319 |   |      |  | 1,351,734 |               |  |  | 936,986 |  
|                                         |  |               |           |   |      |  |           |               |  |  |         |  



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##### Table of Contents

EXHIBIT G

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED
BALANCE SHEETS AS OF DECEMBER 31, 2013, 2012 AND 2011

FOREIGN CURRENCY ASSETS AND LIABILITIES

(In thousands of Argentine pesos as described in Note 2.c.)



|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|---------------------------------- |  | ---------------------------------------- |  |  | ------------ |  |  | ---------------------- | ----- | --- | ---------------------------------------- |  | --------- | ---------------------- |  | ----- | ---------------------------------------- | ------------- | ------- | ---------------------- |  |  | --------- |  |  | ------------- |  |  | ------- |  |  |  | --------- | 
|                                   |  | 2013                                     |  |  | 2012         |  |  | 2011                   |      
|                                   |  | Foreign currencyand amount(in thousands) |  |  | Exchangerate |  |  | Amountin localcurrency |       |     | Foreign currencyand amount(in thousands) |  |           | Amountin localcurrency |  |       | Foreign currencyand amount(in thousands) |               |         | Amountin localcurrency | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          | (non-audited) |         |                        |  |  |           |  |  | (non-audited) | 
|CURRENT ASSETS                     |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|Cash and deposits in banks         |  | US$                                      |  |  | 12,439       |  |  |                        | 6.481 | (1) |                                          |  | 80,617    |                        |  | US$   |                                          |               | 11,837  |                        |  |  | 57,694    |  |  | US$           |  |  | 17,529  |  |  |  | 74,744    | 
|Investments, net                   |  | US$                                      |  |  | 16,915       |  |  |                        | 6.481 | (1) |                                          |  | 109,626   |                        |  | US$   |                                          |               | 45,297  |                        |  |  | 220,777   |  |  | US$           |  |  | 179,492 |  |  |  | 765,354   | 
|Account receivables, net           |  | US$                                      |  |  | 34,128       |  |  |                        | 6.481 | (1) |                                          |  | 221,184   |                        |  | US$   |                                          |               | 41,204  |                        |  |  | 200,829   |  |  | US$           |  |  | 38,550  |  |  |  | 164,377   | 
|Other receivables                  |  | US$                                      |  |  | 5,190        |  |  |                        | 6.481 | (1) |                                          |  | 33,636    |                        |  | US$   |                                          |               | 3,359   |                        |  |  | 16,372    |  |  | US$           |  |  | 5,260   |  |  |  | 22,429    | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  | 445,063   |                        |  |       |                                          |               |         |                        |  |  | 495,672   |  |  |               |  |  |         |  |  |  | 1,026,904 | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|NON CURRENT ASSETS                 |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|Account receivables                |  | US$                                      |  |  |             |  |  |                        | 6.481 | (1) |                                          |  |          |                        |  | US$   |                                          |               | 509     |                        |  |  | 2,481     |  |  | US$           |  |  | 1,446   |  |  |  | 6,166     | 
|Other investments                  |  | US$                                      |  |  | 32,913       |  |  |                        | 6.481 | (1) |                                          |  | 213,309   |                        |  | US$   |                                          |               |        |                        |  |  |          |  |  | US$           |  |  |        |  |  |  |          | 
|Property, plant and equipment, net |  | US$                                      |  |  | 1,607        |  |  |                        | 6.481 | (1) |                                          |  | 10,415    |                        |  | US$   |                                          |               | 3,007   |                        |  |  | 14,656    |  |  | US$           |  |  | 4,770   |  |  |  | 20,339    | 
|                                   |  | Euros                                    |  |  | 2,407        |  |  |                        | 7.778 | (1) |                                          |  | 18,722    |                        |  | Euros |                                          |               | 2,718   |                        |  |  | 17,499    |  |  | Euros         |  |  | 1,083   |  |  |  | 5,993     | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  | 242,446   |                        |  |       |                                          |               |         |                        |  |  | 34,636    |  |  |               |  |  |         |  |  |  | 32,498    | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  | 687,509   |                        |  |       |                                          |               |         |                        |  |  | 530,308   |  |  |               |  |  |         |  |  |  | 1,059,402 | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |    
|CURRENT LIABILITIES                |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|Accounts payable                   |  | US$                                      |  |  | 10,478       |  |  |                        | 6.521 | (2) |                                          |  | 68,327    |                        |  | US$   |                                          |               | 8,347   |                        |  |  | 41,017    |  |  | US$           |  |  | 11,832  |  |  |  | 50,925    | 
|                                   |  | Euros                                    |  |  |             |  |  |                        |       |     |                                          |  |          |                        |  | Euros |                                          |               |        |                        |  |  |          |  |  | Euros         |  |  | 10      |  |  |  | 56        | 
|Tax Payable                        |  | US$                                      |  |  | 18           |  |  |                        | 6.521 | (2) |                                          |  | 117       |                        |  | US$   |                                          |               | 4       |                        |  |  | 22        |  |  | US$           |  |  | 1       |  |  |  | 4         | 
|Loans                              |  | US$                                      |  |  | 97,620       |  |  |                        | 6.521 | (2) |                                          |  | 636,578   |                        |  | US$   |                                          |               | 3,837   |                        |  |  | 18,856    |  |  | US$           |  |  | 338,466 |  |  |  | 1,456,758 | 
|Advances from customers            |  | US$                                      |  |  |             |  |  |                        | 6.521 | (2) |                                          |  |          |                        |  | US$   |                                          |               | 2,041   |                        |  |  | 10,029    |  |  | US$           |  |  | 2,041   |  |  |  | 8,784     | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  | 705,022   |                        |  |       |                                          |               |         |                        |  |  | 69,924    |  |  |               |  |  |         |  |  |  | 1,516,527 | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |    
|NON CURRENT LIABILITIES            |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|Loans                              |  | US$                                      |  |  | 304,360      |  |  |                        | 6.521 | (2) |                                          |  | 1,984,732 |                        |  | US$   |                                          |               | 396,952 |                        |  |  | 1,950,623 |  |  | US$           |  |  | 396,096 |  |  |  | 1,704,799 | 
|Advances from customers            |  | US$                                      |  |  |             |  |  |                        | 6.521 | (2) |                                          |  |          |                        |  | US$   |                                          |               |        |                        |  |  |          |  |  | US$           |  |  | 77      |  |  |  | 330       | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  | 1,984,732 |                        |  |       |                                          |               |         |                        |  |  | 1,950,623 |  |  |               |  |  |         |  |  |  | 1,705,129 | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  | 2,689,754 |                        |  |       |                                          |               |         |                        |  |  | 2,020,547 |  |  |               |  |  |         |  |  |  | 3,221,656 | 
|                                   |  |                                          |  |  |              |  |  |                        |       |     |                                          |  |           |                        |  |       |                                          |               |         |                        |  |  |           |  |  |               |  |  |         |  |  |  |           | 



|(1) | Buy exchange rate at the end of the year.
|--- | -----------------------------------------

|(2) | Sell exchange rate at the end of the year.
|--- | ------------------------------------------

|US$: | United States of America dollars
|---- | --------------------------------



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##### Table of Contents

EXHIBIT H

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A

CONSOLIDATED
INFORMATION REQUIRED UNDER ART 64, PARAGRAPH I, CLAUSE b) BUSINESS ASSOCIATIONS LAW

FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND
2011



|                                                    |  |                                                             |           |  |                     |  |         |                         |  |  |                            |  |  |                    |         |  |                  |  |         |       |  |  |         |  |  |  |           |     |  |  |           |    
|--------------------------------------------------- |  | ----------------------------------------------------------- | --------- |  | ------------------- |  | ------- | ----------------------- |  |  | -------------------------- |  |  | ------------------ | ------- |  | ---------------- |  | ------- | ----- |  |  | ------- |  |  |  | --------- | --- |  |  | --------- | ---
|                                                    |  | (In thousands of Argentine pesos as described in Note 2.c.) |          
|                                                    |  | 2013                                                        |           |  | 2012                |  |         | 2011                    | 
|                                                    |  | (non-audited)                                               |           |  |                     |  |         | (non-audited)           | 
|Accounts                                            |  | Total                                                       |           |  | RegulatedActivities |  |         | Non OperatingActivities |  |  | Administrativeexpenses
(2) |  |  | Sellingexpenses(3) |         |  | Financialexpense |  |         | Total |  |  | Total   | 
|Salaries, wages and other contributions             |  |                                                             | 305,657   |  |                     |  | 169,043 |                         |  |  | 60,064                     |  |  |                    | 58,276  |  |                  |  | 18,274  |       |  |  |        |  |  |  | 241,779   |     |  |  | 199,973   |    
|Social security taxes                               |  |                                                             | 55,159    |  |                     |  | 27,184  |                         |  |  | 10,736                     |  |  |                    | 13,290  |  |                  |  | 3,949   |       |  |  |        |  |  |  | 43,260    |     |  |  | 35,450    |    
|Compensation of Directors and Supervisory Committee |  |                                                             | 2,957     |  |                     |  |        |                         |  |  |                           |  |  |                    | 2,957   |  |                  |  |        |       |  |  |        |  |  |  | 2,322     |     |  |  | 2,163     |    
|Professional services fees                          |  |                                                             | 15,199    |  |                     |  | 355     |                         |  |  | 862                        |  |  |                    | 13,405  |  |                  |  | 577     |       |  |  |        |  |  |  | 14,442    |     |  |  | 16,521    |    
|Technical operator assistance fees                  |  |                                                             | 52,952    |  |                     |  | 6,425   |                         |  |  | 46,527                     |  |  |                    |        |  |                  |  |        |       |  |  |        |  |  |  | 52,046    |     |  |  | 41,050    |    
|Materials                                           |  |                                                             | 18,790    |  |                     |  | 5,886   |                         |  |  | 12,904                     |  |  |                    |        |  |                  |  |        |       |  |  |        |  |  |  | 14,389    |     |  |  | 12,298    |    
|Third parties services                              |  |                                                             | 30,706    |  |                     |  | 11,140  |                         |  |  | 14,801                     |  |  |                    | 4,765   |  |                  |  |        |       |  |  |        |  |  |  | 24,873    |     |  |  | 20,911    |    
|Telecommunications and postal expenses              |  |                                                             | 2,847     |  |                     |  | 474     |                         |  |  | 595                        |  |  |                    | 1,569   |  |                  |  | 209     |       |  |  |        |  |  |  | 2,434     |     |  |  | 2,444     |    
|Rents                                               |  |                                                             | 1,354     |  |                     |  | 310     |                         |  |  | 95                         |  |  |                    | 882     |  |                  |  | 67      |       |  |  |        |  |  |  | 1,230     |     |  |  | 958       |    
|Transportation and freight                          |  |                                                             | 10,694    |  |                     |  | 7,634   |                         |  |  | 2,875                      |  |  |                    | 178     |  |                  |  | 7       |       |  |  |        |  |  |  | 9,051     |     |  |  | 6,314     |    
|Easements                                           |  |                                                             | 18,172    |  |                     |  | 18,172  |                         |  |  |                           |  |  |                    |        |  |                  |  |        |       |  |  |        |  |  |  | 15,605    |     |  |  | 17,392    |    
|Offices supplies                                    |  |                                                             | 1,068     |  |                     |  | 362     |                         |  |  | 131                        |  |  |                    | 444     |  |                  |  | 131     |       |  |  |        |  |  |  | 977       |     |  |  | 980       |    
|Travel expenses                                     |  |                                                             | 3,981     |  |                     |  | 2,190   |                         |  |  | 636                        |  |  |                    | 836     |  |                  |  | 319     |       |  |  |        |  |  |  | 3,662     |     |  |  | 4,039     |    
|Insurance                                           |  |                                                             | 15,987    |  |                     |  | 9,099   |                         |  |  | 5,491                      |  |  |                    | 1,371   |  |                  |  | 26      |       |  |  |        |  |  |  | 13,730    |     |  |  | 11,677    |    
|Property, plant and equipment maintenance           |  |                                                             | 83,193    |  |                     |  | 54,970  |                         |  |  | 25,807                     |  |  |                    | 2,025   |  |                  |  | 391     |       |  |  |        |  |  |  | 75,068    |     |  |  | 64,883    |    
|Depreciation of property, plant and equipment       |  |                                                             | 242,917   |  |                     |  | 166,326 |                         |  |  | 63,271                     |  |  |                    | 13,320  |  |                  |  |        |       |  |  |        |  |  |  | 233,670   |     |  |  | 220,388   |    
|Taxes and contributions                             |  |                                                             | 489,735   |  |                     |  | 43,793  |                         |  |  | 10,904                     |  |  |                    | 1,970   |  |                  |  | 433,068 | (1)   |  |  |        |  |  |  | 443,498   | (1) |  |  | 284,864   | (1)
|Advertising                                         |  |                                                             | 45        |  |                     |  |        |                         |  |  |                           |  |  |                    |        |  |                  |  | 45      |       |  |  |        |  |  |  | 545       |     |  |  | 72        |    
|Doubtful accounts                                   |  |                                                             |          |  |                     |  |        |                         |  |  |                           |  |  |                    |        |  |                  |  |        |       |  |  |        |  |  |  | 127       |     |  |  | 3,281     |    
|Bank expenses                                       |  |                                                             | 1,135     |  |                     |  |        |                         |  |  |                           |  |  |                    | 1,092   |  |                  |  | 43      |       |  |  |        |  |  |  | 872       |     |  |  | 561       |    
|Interest expense                                    |  |                                                             | 230,864   |  |                     |  |        |                         |  |  |                           |  |  |                    |        |  |                  |  |        |       |  |  | 230,864 |  |  |  | 206,603   |     |  |  | 189,785   |    
|Foreign exchange loss                               |  |                                                             | 627,182   |  |                     |  |        |                         |  |  |                           |  |  |                    |        |  |                  |  |        |       |  |  | 627,182 |  |  |  | 325,031   |     |  |  | 233,172   |    
|Other expenses and financial charges                |  |                                                             | 30,466    |  |                     |  |        |                         |  |  |                           |  |  |                    |        |  |                  |  |        |       |  |  | 30,466  |  |  |  | 21,069    |     |  |  | 25,556    |    
|Operations among business segments                  |  |                                                             |          |  |                     |  | (6,603  | )                       |  |  | 6,603                      |  |  |                    |        |  |                  |  |        |       |  |  |        |  |  |  |          |     |  |  |          |    
|Costs of services rendered to third parties         |  |                                                             | 16,571    |  |                     |  |        |                         |  |  | 16,571                     |  |  |                    |        |  |                  |  |        |       |  |  |        |  |  |  | 32,381    |     |  |  | 20,598    |    
|Other expenses                                      |  |                                                             | 12,513    |  |                     |  | 5,148   |                         |  |  | 3,363                      |  |  |                    | 3,744   |  |                  |  | 258     |       |  |  |        |  |  |  | 9,279     |     |  |  | 10,682    |    
|                                                    |  |                                                             |           |  |                     |  |         |                         |  |  |                            |  |  |                    |         |  |                  |  |         |       |  |  |         |  |  |  |           |     |  |  |           |    
|Total 2013                                          |  |                                                             | 2,270,144 |  |                     |  | 521,908 |                         |  |  | 282,236                    |  |  |                    | 120,124 |  |                  |  | 457,364 |       |  |  | 888,512 |  |  |  |           |     |  |  |           |    
|                                                    |  |                                                             |           |  |                     |  |         |                         |  |  |                            |  |  |                    |         |  |                  |  |         |       |  |  |         |  |  |  |           |     |  |  |           |    
|Total 2012                                          |  |                                                             |           |  |                     |  | 473,413 |                         |  |  | 243,247                    |  |  |                    | 95,347  |  |                  |  | 423,233 |       |  |  | 552,703 |  |  |  | 1,787,943 |     |  |  |           |    
|                                                    |  |                                                             |           |  |                     |  |         |                         |  |  |                            |  |  |                    |         |  |                  |  |         |       |  |  |         |  |  |  |           |     |  |  |           |    
|Total 2011                                          |  |                                                             |           |  |                     |  | 406,521 |                         |  |  | 205,725                    |  |  |                    | 87,855  |  |                  |  | 277,398 |       |  |  | 448,513 |  |  |  |           |     |  |  | 1,426,012 |    
|                                                    |  |                                                             |           |  |                     |  |         |                         |  |  |                            |  |  |                    |         |  |                  |  |         |       |  |  |         |  |  |  |           |     |  |  |           |    



|(1) | Includes tax on exports of Ps. 363,435, Ps.357,409 and Ps.219,559 for the years ended December 31, 2013, 2012 and 2011 respectively.
|--- | ------------------------------------------------------------------------------------------------------------------------------------

|(2) | From the total of Administrative Expenses, Ps. 24,483, Ps. 14,740 and Ps. 17,012 correspond to the non regulated activities for the years ended
December 31, 2013, 2012 and 2011, respectively.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | From the total of Selling Expenses, Ps. 428,758, Ps. 396,629 and Ps. 247,960 correspond to the non regulated activities for the years ended
December 31, 2013, 2012 and 2011, respectively.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

EXHIBIT I

COMPAÑÍA DE INVERSIONES DE ENERGÍA S.A.

CONSOLIDATED
BALANCE SHEET AS OF DECEMBER 31, 2013

DETAIL OF MATURITIES OF INVESTMENTS, RECEIVABLES AND LIABILITIES

(In thousands of Argentine pesos as described in Note 2.c.)



|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|---------------------------- |  | ---------------- | --------- |  | ---------------- |  | ------- | ----- |  |  | --------------------- |  |  |  | ------- | 
|                             |  | Investments 
(1) |           |  | Receivables 
(2) |  |         | Loans |  |  | Otherliabilities 
(3) | 
|                             |  |                  |           | 
|Without specified maturity   |  |                  |          |  |                  |  | 43,772  |       |  |  |                      |  |  |  | 31,160  | 
|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|                             |  |                  |           | 
|With specified maturity      |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|                             |  |                  |           | 
|* Overdue                    |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|                             |  |                  |           | 
|Until 12-31-2012             |  |                  |          |  |                  |  | 9,235   |       |  |  |                      |  |  |  | 46,483  | 
|From 01-01-13 to 03-31-13    |  |                  |          |  |                  |  | 5,647   |       |  |  |                      |  |  |  | 402     | 
|From 04-01-13 to 06-30-13    |  |                  |          |  |                  |  | 5,436   |       |  |  |                      |  |  |  | 402     | 
|From 07-01-13 to 09-30-13    |  |                  |          |  |                  |  | 12,831  |       |  |  |                      |  |  |  | 402     | 
|From 10-01-13 to 12-31-13    |  |                  |          |  |                  |  | 30,803  |       |  |  | 1,971                 |  |  |  | 411     | 
|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|Total Overdue                |  |                  |          |  |                  |  | 63,952  |       |  |  | 1,971                 |  |  |  | 48,100  | 
|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|                             |  |                  |           | 
|* Non-due:                   |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|                             |  |                  |           | 
|From 01-01-14 to 03-31-14    |  |                  | 1,119,686 |  |                  |  | 536,357 |       |  |  | 3,274                 |  |  |  | 465,135 | 
|From 04-01-14 to 06-30-14    |  |                  |          |  |                  |  | 9,522   |       |  |  | 635,984               |  |  |  | 33,409  | 
|From 07-01-14 to 09-30-14    |  |                  |          |  |                  |  | 2,566   |       |  |  | 2,939                 |  |  |  | 4,899   | 
|From 10-01-14 to 12-31-14    |  |                  |          |  |                  |  | 2,500   |       |  |  | 4,571                 |  |  |  | 4,899   | 
|During 2015                  |  |                  | 194,154   |  |                  |  | 9,998   |       |  |  | 784,788               |  |  |  | 22,566  | 
|During 2016                  |  |                  |          |  |                  |  | 14,127  |       |  |  | 622,382               |  |  |  | 24,153  | 
|During 2017                  |  |                  |          |  |                  |  | 10,001  |       |  |  | 611,164               |  |  |  | 17,528  | 
|During 2018                  |  |                  | 19,155    |  |                  |  | 4,339   |       |  |  |                      |  |  |  | 16,203  | 
|From 2019 onwards            |  |                  |          |  |                  |  | 3,797   |       |  |  |                      |  |  |  | 231,455 | 
|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|Total non-due                |  |                  | 1,332,995 |  |                  |  | 593,207 |       |  |  | 2,665,102             |  |  |  | 820,247 | 
|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|Total with specific maturity |  |                  | 1,332,995 |  |                  |  | 657,159 |       |  |  | 2,667,073             |  |  |  | 868,347 | 
|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 
|Total                        |  |                  | 1,332,995 |  |                  |  | 700,931 |       |  |  | 2,667,073             |  |  |  | 899,507 | 
|                             |  |                  |           |  |                  |  |         |       |  |  |                       |  |  |  |         | 



|(1) | Includes mutual funds, loans, time deposits, public and private and bank accounts. Such investments bear floating interest rates, except for Ps.
194,154 wich bear interests at 6.8% plus VAT annual.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Includes account receivables and other receivables, without the allowance for doubtful accounts. Said credits do not bear interests, except for Ps.
3,677 which bear interests at 5.52% semi-annual rate and Ps. 45,581 which bears CER plus a spread of 8%. The total credits without specific maturity correspond to non-current assets.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Corresponds to the total non financial liabilities, except for provisions for contingencies. From the total Other liabilities without specified
maturity, Ps. 1,224 correspond to current liabilities and Ps. 29,936 to non-current liabilities.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



F-129



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##### Table of Contents

Oil and Gas Supplementary Disclosures (Unaudited)

In December 2009, the Company adopted revised oil and gas reserve and disclosure requirements. The primary impact of the
new disclosures is to conform the definition of proved reserves with the Modernization of Oil and Gas Reporting rules, which were issued by the Securities and Exchange Commission (SEC) of the United States of America at the end of 2008.
The accounting standards update revised the definition of proved oil and gas reserves to require that the average, first-day-of-the-month price during the 12-month period before the end of the year, rather than the year-end price, must be used when
estimating whether reserve quantities are economical to produce. This same 12-month average price is also used in calculating the aggregate amount of (and changes in) future cash inflows related to the standardized measure of discounted future net
cash flows. The rules also allow for the use of reliable technology to estimate proved oil and gas reserves if those technologies have been demonstrated to result in reliable conclusions about reserve volumes.

The unaudited supplemental information on oil and gas exploration and production activities for 2013, 2012 and 2011 has
been presented in accordance with the new reserve estimation and disclosure rules, which may not be applied retrospectively.

The following information for the oil and gas producing activities has been prepared in accordance with the methodology prescribed by ASC 932 of the FASB Accounting Standards Codification (ASC) relating
to Extractive Activities  Oil and Gas (formerly SFAS no. 69 Disclosures about Oil and Gas Producing Activities) and includes the Companys and its subsidiaries oil and gas production activities as well as the equity shares in its
associates valued by the equity method. The Company has oil and gas properties in Argentina and other countries in Latin America.

Amounts are stated in millions of pesos.

Capitalized costs

The following table presents the capitalized costs as of December 31, 2013, 2012 and 2011, for
proved and unproved oil and gas properties, and the related accumulated depreciation and allowances, which reduce the value of assets.



|                                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |   |  |       |  |        |   |  |  |        |  
|------------------------------------------------------------------------ |  | --------------------------------------- | ------- | - | ------------------------ |  | ----- | ----- |  |  | --------- | - |  | --------- | - |  | ----- |  | ------ | - |  |  | ------ | -
|                                                                         |  | Consolidated Companies                  |         |   | Equity Method Investment | 
|                                                                         |  | Argentina                               |         |   | Rest ofLatin-America     |  |       | Total |  |  | Argentina |   |  | Venezuela |   |  | Total | 
|                                                                         |  | (Stated in millions of Argentine pesos) |        
|December 31, 2013                                                        |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |   |  |       |  |        |   |  |  |        |  
|                                                                         |  |                                         |         |   |                          | 
|Proved properties:                                                       |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |   |  |       |  |        |   |  |  |        |  
|Equipment, camps and other facilities                                    |  |                                         | 4,818   |   |                          |  | 85    |       |  |  | 4,903     |   |  |           |  |  |       |  |       |   |  |  |       |  
|Mining properties and wells                                              |  |                                         | 13,097  |   |                          |  | 1,056 |       |  |  | 14,153    |   |  |           |  |  |       |  | 3,730  |   |  |  | 3,730  |  
|Unproved properties                                                      |  |                                         | 298     |   |                          |  |      |       |  |  | 298       |   |  |           |  |  |       |  |       |   |  |  |       |  
|                                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |   |  |       |  |        |   |  |  |        |  
|Total capitalized costs                                                  |  |                                         | 18,213  |   |                          |  | 1,141 |       |  |  | 19,354    |   |  |           |  |  |       |  | 3,730  |   |  |  | 3,730  |  
|                                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |   |  |       |  |        |   |  |  |        |  
|Accumulated depreciation and allowances which reduce the value of assets |  |                                         | (11,612 | ) |                          |  | (637  | )     |  |  | (12,249   | ) |  |           |  |  |       |  | (1,181 | ) |  |  | (1,181 | )
|                                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |   |  |       |  |        |   |  |  |        |  
|Total net capitalized costs                                              |  |                                         | 6,601   |   |                          |  | 504   |       |  |  | 7,105     |   |  |           |  |  |       |  | 2,549  |   |  |  | 2,549  |  
|                                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |   |  |       |  |        |   |  |  |        |  



S-1



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##### Table of Contents

|                                                                         |  |                                         |         |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|------------------------------------------------------------------------ |  | --------------------------------------- | ------- | - | ------------------------ |  | ---- | ----- |  |  | --------- | - |  | --------- | - |  | ----- |  | ----- | - |  |  | ----- | -
|                                                                         |  | Consolidated Companies                  |         |   | Equity Method Investment | 
|                                                                         |  | Argentina                               |         |   | Rest ofLatin-America     |  |      | Total |  |  | Argentina |   |  | Venezuela |   |  | Total | 
|                                                                         |  | (Stated in millions of Argentine pesos) |        
|December 31, 2012                                                        |  |                                         |         |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|                                                                         |  |                                         |         |   |                          | 
|Proved properties:                                                       |  |                                         |         |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Equipment, camps and other facilities                                    |  |                                         | 4,580   |   |                          |  | 64   |       |  |  | 4,644     |   |  |           |  |  |       |  |      |   |  |  |      |  
|Mining properties and wells                                              |  |                                         | 11,250  |   |                          |  | 635  |       |  |  | 11,885    |   |  |           |  |  |       |  | 2,900 |   |  |  | 2,900 |  
|Unproved properties                                                      |  |                                         | 116     |   |                          |  |     |       |  |  | 116       |   |  |           |  |  |       |  |      |   |  |  |      |  
|                                                                         |  |                                         |         |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Total capitalized costs                                                  |  |                                         | 15,946  |   |                          |  | 699  |       |  |  | 16,645    |   |  |           |  |  |       |  | 2,900 |   |  |  | 2,900 |  
|                                                                         |  |                                         |         |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Accumulated depreciation and allowances which reduce the value of assets |  |                                         | (10,116 | ) |                          |  | (462 | )     |  |  | (10,578   | ) |  |           |  |  |       |  | (807  | ) |  |  | (807  | )
|                                                                         |  |                                         |         |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Total net capitalized costs                                              |  |                                         | 5,830   |   |                          |  | 237  |       |  |  | 6,067     |   |  |           |  |  |       |  | 2,093 |   |  |  | 2,093 |  
|                                                                         |  |                                         |         |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  



|                                                                         |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|------------------------------------------------------------------------ |  | --------------------------------------- | ------ | - | ------------------------ |  | ---- | ----- |  |  | --------- | - |  | --------- | ---- | - | ----- |  | ----- | - |  |  | ----- | -
|                                                                         |  | Consolidated Companies                  |        |   | Equity Method Investment | 
|                                                                         |  | Argentina                               |        |   | Rest ofLatin-America     |  |      | Total |  |  | Argentina |   |  | Venezuela |      |   | Total | 
|                                                                         |  | (Stated in millions of Argentine pesos) |       
|December 31, 2011                                                        |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|                                                                         |  |                                         |        |   |                          | 
|Proved properties:                                                       |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|Equipment, camps and other facilities                                    |  |                                         | 4,481  |   |                          |  | 88   |       |  |  | 4,569     |   |  |           | 5    |   |       |  |      |   |  |  | 5     |  
|Mining properties and wells                                              |  |                                         | 8,324  |   |                          |  | 518  |       |  |  | 8,842     |   |  |           | 390  |   |       |  | 2,790 |   |  |  | 3,180 |  
|Unproved properties                                                      |  |                                         | 173    |   |                          |  |     |       |  |  | 173       |   |  |           |     |   |       |  |      |   |  |  |      |  
|                                                                         |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|Total capitalized costs                                                  |  |                                         | 12,978 |   |                          |  | 606  |       |  |  | 13,584    |   |  |           | 395  |   |       |  | 2,790 |   |  |  | 3,185 |  
|                                                                         |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|Accumulated depreciation and allowances which reduce the value of assets |  |                                         | (8,489 | ) |                          |  | (383 | )     |  |  | (8,872    | ) |  |           | (203 | ) |       |  | (635  | ) |  |  | (838  | )
|                                                                         |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|Total net capitalized costs                                              |  |                                         | 4,489  |   |                          |  | 223  |       |  |  | 4,712     |   |  |           | 192  |   |       |  | 2,155 |   |  |  | 2,347 |  
|                                                                         |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  

Costs incurred

The following table presents those costs capitalized as well as expensed that were incurred during each of the years ended
as of December 31, 2013, 2012 and 2011. The acquisition of properties includes the cost of acquisition of proved or unproved oil and gas properties. Exploration costs include geological and geophysical costs, costs necessary for retaining
undeveloped properties, and drilling costs and exploratory well equipment. Development costs include drilling costs and equipment for developmental wells, costs incurred in improved recovery, the construction of facilities for extraction, treatment
and storage of hydrocarbons and all necessary costs to maintain facilities for the existing developed reserves.



S-2



---

##### Table of Contents

|                           |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|-------------------------- |  | --------------------------------------- | ----- |  | ------------------------ |  | -- | ----- |  |  | --------- |  |  | --------- | -- |  | ----- |  | --- |  |  |  | --- | 
|                           |  | Consolidated companies                  |       |  | Equity Method Investment | 
|                           |  | Argentina                               |       |  | Rest ofLatin-America     |  |    | Total |  |  | Argentina |  |  | Venezuela |    |  | Total | 
|                           |  | (Stated in millions of Argentine pesos) |      
|At December 31, 2013       |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|                           |  |                                         |       |  |                          | 
|Acquisition of properties: |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|- Proved                   |  |                                         |      |  |                          |  |   |       |  |  |          |  |  |           |   |  |       |  |    |  |  |  |    | 
|- Unproved                 |  |                                         | 59    |  |                          |  |   |       |  |  | 59        |  |  |           |   |  |       |  |    |  |  |  |    | 
|Exploration costs          |  |                                         | 315   |  |                          |  |   |       |  |  | 315       |  |  |           |   |  |       |  |    |  |  |  |    | 
|Development costs          |  |                                         | 2,087 |  |                          |  | 31 |       |  |  | 2,118     |  |  |           |   |  |       |  | 240 |  |  |  | 240 | 
|                           |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|Total costs incurred       |  |                                         | 2,461 |  |                          |  | 31 |       |  |  | 2,492     |  |  |           |   |  |       |  | 240 |  |  |  | 240 | 
|                           |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|                           |  |                                        
|                           |  | Consolidated companies                  |       |  | Equity Method Investment | 
|                           |  | Argentina                               |       |  | Rest ofLatin-America     |  |    | Total |  |  | Argentina |  |  | Venezuela |    |  | Total | 
|                           |  | (Stated in millions of Argentine pesos) |      
|At December 31, 2012       |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|Acquisition of properties: |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|- Proved                   |  |                                         | 1,214 |  |                          |  |   |       |  |  | 1,214     |  |  |           |   |  |       |  |    |  |  |  |    | 
|- Unproved                 |  |                                         | 28    |  |                          |  |   |       |  |  | 28        |  |  |           | 3  |  |       |  |    |  |  |  | 3   | 
|Exploration costs          |  |                                         | 110   |  |                          |  |   |       |  |  | 110       |  |  |           | 1  |  |       |  |    |  |  |  | 1   | 
|Development costs          |  |                                         | 1,576 |  |                          |  | 26 |       |  |  | 1,602     |  |  |           | 30 |  |       |  | 95  |  |  |  | 125 | 
|                           |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|Total costs incurred       |  |                                         | 2,928 |  |                          |  | 26 |       |  |  | 2,954     |  |  |           | 34 |  |       |  | 95  |  |  |  | 129 | 
|                           |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|At December 31, 2011       |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|                           |  |                                         |       |  |                          | 
|Acquisition of properties: |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|- Proved                   |  |                                         |      |  |                          |  |   |       |  |  |          |  |  |           |   |  |       |  |    |  |  |  |    | 
|- Unproved                 |  |                                         |      |  |                          |  |   |       |  |  |          |  |  |           |   |  |       |  |    |  |  |  |    | 
|Exploration costs          |  |                                         | 402   |  |                          |  |   |       |  |  | 402       |  |  |           | 4  |  |       |  |    |  |  |  | 4   | 
|Development costs          |  |                                         | 1,212 |  |                          |  | 21 |       |  |  | 1,233     |  |  |           | 66 |  |       |  | 98  |  |  |  | 164 | 
|                           |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 
|Total costs incurred       |  |                                         | 1,614 |  |                          |  | 21 |       |  |  | 1,635     |  |  |           | 70 |  |       |  | 98  |  |  |  | 168 | 
|                           |  |                                         |       |  |                          |  |    |       |  |  |           |  |  |           |    |  |       |  |     |  |  |  |     | 

Results of operations

The breakdown of results of the operations shown below summarizes revenues and expenses directly associated with oil and
gas-producing activities for the years ended December 31, 2013, 2012 and 2011. These activities are a part of the Oil and Gas Exploration and Production segment. This breakdown does not include any allocation of financial costs or expenses from
Corporate and therefore it is not necessarily an indicator of the contribution in operations for oil and gas producing activities to the net income of the Company. Income tax for the years presented was calculated utilizing the deferred income tax
criteria.



S-3



---

##### Table of Contents

|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|------------------------------------------------------------------------------------- |  | --------------------------------------- | ------ | - | ------------------------ |  | --- | ----- |  |  | --------- | - |  | --------- | - |  | ----- |  | ----- | - |  |  | ----- | -
|                                                                                      |  | Consolidated companies                  |        |   | Equity Method Investment | 
|                                                                                      |  | Argentina                               |        |   | Rest ofLatin-America     |  |     | Total |  |  | Argentina |   |  | Venezuela |   |  | Total | 
|                                                                                      |  | (Stated in millions of Argentine pesos) |       
|At December 31, 2013                                                                  |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|                                                                                      |  |                                         |        |   |                          | 
|Net sales:                                                                            |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|- to third parties                                                                    |  |                                         | 1,625  |   |                          |  | 189 |       |  |  | 1,814     |   |  |           |  |  |       |  | 1,172 |   |  |  | 1,172 |  
|- transfers to other operations                                                       |  |                                         | 6,024  |   |                          |  |    |       |  |  | 6,024     |   |  |           |  |  |       |  |      |   |  |  |      |  
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Total net sales                                                                       |  |                                         | 7,649  |   |                          |  | 189 |       |  |  | 7,838     |   |  |           |  |  |       |  | 1,172 |   |  |  | 1,172 |  
|Production costs:                                                                     |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|- Operating costs                                                                     |  |                                         | (2,525 | ) |                          |  | (77 | )     |  |  | (2,602    | ) |  |           |  |  |       |  | (306  | ) |  |  | (306  | )
|- Royalties and other                                                                 |  |                                         | (1,169 | ) |                          |  | (9  | )     |  |  | (1,178    | ) |  |           |  |  |       |  | (293  | ) |  |  | (293  | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Total production costs                                                                |  |                                         | (3,694 | ) |                          |  | (86 | )     |  |  | (3,780    | ) |  |           |  |  |       |  | (599  | ) |  |  | (599  | )
|Exploration costs                                                                     |  |                                         | (82    | ) |                          |  |    |       |  |  | (82       | ) |  |           |  |  |       |  |      |   |  |  |      |  
|Depreciation, depletion, amortization and allowances which reduce the value of assets |  |                                         | (1,934 | ) |                          |  | (27 | )     |  |  | (1,961    | ) |  |           |  |  |       |  | (985  | ) |  |  | (985  | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Results of operations before income tax                                               |  |                                         | 1,939  |   |                          |  | 76  |       |  |  | 2,015     |   |  |           |  |  |       |  | (412  | ) |  |  | (412  | )
|Income tax                                                                            |  |                                         | (679   | ) |                          |  | (20 | )     |  |  | (699      | ) |  |           |  |  |       |  | 59    |   |  |  | 59    |  
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Total Results of oil and gas operations                                               |  |                                         | 1,260  |   |                          |  | 56  |       |  |  | 1,316     |   |  |           |  |  |       |  | (353  | ) |  |  | (353  | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  



S-4



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##### Table of Contents

|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|------------------------------------------------------------------------------------- |  | --------------------------------------- | ------ | - | ------------------------ |  | --- | ----- |  |  | --------- | - |  | --------- | --- | - | ----- |  | ---- | - |  |  | ---- | -
|                                                                                      |  | Consolidated companies                  |        |   | Equity Method Investment | 
|                                                                                      |  | Argentina                               |        |   | Rest ofLatin-America     |  |     | Total |  |  | Argentina |   |  | Venezuela |     |   | Total | 
|                                                                                      |  | (Stated in millions of Argentine pesos) |       
|At December 31, 2012                                                                  |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|Net sales:                                                                            |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|- to third parties                                                                    |  |                                         | 874    |   |                          |  | 168 |       |  |  | 1,042     |   |  |           | 109 |   |       |  | 845  |   |  |  | 954  |  
|- transfers to other operations                                                       |  |                                         | 5,071  |   |                          |  |    |       |  |  | 5,071     |   |  |           | 1   |   |       |  |     |   |  |  | 1    |  
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|Total net sales                                                                       |  |                                         | 5,945  |   |                          |  | 168 |       |  |  | 6,113     |   |  |           | 110 |   |       |  | 845  |   |  |  | 955  |  
|Production costs:                                                                     |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|- Operating costs                                                                     |  |                                         | (1,854 | ) |                          |  | (72 | )     |  |  | (1,926    | ) |  |           | (25 | ) |       |  | (269 | ) |  |  | (294 | )
|- Royalties and other                                                                 |  |                                         | (987   | ) |                          |  | (10 | )     |  |  | (997      | ) |  |           | (14 | ) |       |  | (195 | ) |  |  | (209 | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|Total production costs                                                                |  |                                         | (2,841 | ) |                          |  | (82 | )     |  |  | (2,923    | ) |  |           | (39 | ) |       |  | (464 | ) |  |  | (503 | )
|Exploration costs                                                                     |  |                                         | (212   | ) |                          |  |    |       |  |  | (212      | ) |  |           | (1  | ) |       |  |     |   |  |  | (1   | )
|Depreciation, depletion, amortization and allowances which reduce the value of assets |  |                                         | (1,484 | ) |                          |  | (23 | )     |  |  | (1,507    | ) |  |           | (23 | ) |       |  | (380 | ) |  |  | (403 | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|Results of operations before income tax                                               |  |                                         | 1,365  |   |                          |  | 63  |       |  |  | 1,471     |   |  |           | 47  |   |       |  | 1    |   |  |  | 48   |  
|Income tax                                                                            |  |                                         | (478   | ) |                          |  | (17 | )     |  |  | (495      | ) |  |           | (19 | ) |       |  | (53  | ) |  |  | (72  | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  
|Total Results of oil and gas operations                                               |  |                                         | 887    |   |                          |  | 46  |       |  |  | 976       |   |  |           | 28  |   |       |  | (52  | ) |  |  | (24  | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |      |   |  |  |      |  



S-5



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##### Table of Contents

|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|------------------------------------------------------------------------------------- |  | --------------------------------------- | ------ | - | ------------------------ |  | --- | ----- |  |  | --------- | - |  | --------- | --- | - | ----- |  | ----- | - |  |  | ----- | -
|                                                                                      |  | Consolidated companies                  |        |   | Equity Method Investment | 
|                                                                                      |  | Argentina                               |        |   | Rest ofLatin-America     |  |     | Total |  |  | Argentina |   |  | Venezuela |     |   | Total | 
|                                                                                      |  | (Stated in millions of Argentine pesos) |       
|At December 31, 2011                                                                  |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|Net sales:                                                                            |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|- to third parties                                                                    |  |                                         | 16     |   |                          |  | 160 |       |  |  | 176       |   |  |           | 170 |   |       |  | 1,025 |   |  |  | 1,195 |  
|- transfers to other operations                                                       |  |                                         | 3,968  |   |                          |  |    |       |  |  | 3,968     |   |  |           | 28  |   |       |  |      |   |  |  | 28    |  
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|Total net sales                                                                       |  |                                         | 3,984  |   |                          |  | 160 |       |  |  | 4,144     |   |  |           | 198 |   |       |  | 1,025 |   |  |  | 1,223 |  
|Production costs:                                                                     |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|- Operating costs                                                                     |  |                                         | (1,329 | ) |                          |  | (64 | )     |  |  | (1,393    | ) |  |           | (54 | ) |       |  | (169  | ) |  |  | (223  | )
|- Royalties and other                                                                 |  |                                         | (697   | ) |                          |  | (5  | )     |  |  | (702      | ) |  |           | (26 | ) |       |  | (336  | ) |  |  | (362  | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|Total production costs                                                                |  |                                         | (2,026 | ) |                          |  | (69 | )     |  |  | (2,095    | ) |  |           | (80 | ) |       |  | (505  | ) |  |  | (585  | )
|Exploration costs                                                                     |  |                                         | (391   | ) |                          |  |    |       |  |  | (391      | ) |  |           | (4  | ) |       |  |      |   |  |  | (4    | )
|Depreciation, depletion, amortization and allowances which reduce the value of assets |  |                                         | (1,011 | ) |                          |  | (20 | )     |  |  | (1,031    | ) |  |           | (56 | ) |       |  | (513  | ) |  |  | (569  | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|Results of operations before income tax                                               |  |                                         | 556    |   |                          |  | 71  |       |  |  | 627       |   |  |           | 58  |   |       |  | 7     |   |  |  | 65    |  
|Income tax                                                                            |  |                                         | (192   | ) |                          |  | (19 | )     |  |  | (211      | ) |  |           | (23 | ) |       |  | (73   | ) |  |  | (96   | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  
|Total Results of oil and gas operations                                               |  |                                         | 364    |   |                          |  | 52  |       |  |  | 416       |   |  |           | 35  |   |       |  | (66   | ) |  |  | (31   | )
|                                                                                      |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |     |   |       |  |       |   |  |  |       |  

Estimated oil and gas reserves

Proved reserves represent estimated quantities of oil (including crude oil, condensate and natural gas liquids) and
natural gas, which available geological and engineering data demonstrates with reasonable certainty to be recoverable in the future from known reservoirs under existing economic and operating conditions. Proved developed reserves are proved reserves
that can reasonably be expected to be recovered through existing wells with existing equipment and operating methods. The choice of method or combination of methods employed in the analysis of each reservoir was determined by the stage of
development, quality and reliability of basic data, and production history.

The Company believes that its
estimates of remaining proved recoverable oil and gas reserve volumes are reasonable and such estimates have been prepared in accordance with the SEC Modernization of Oil and Gas Reporting rules, which were issued by the SEC at the end of 2008.

The Company estimates its reserves at least once a year. The Companys reserves estimation as of
December 31, 2013, 2012 and 2011 was evaluated by DeGolyer and MacNaughton. The technical revision covered approximately 73%, 76% and 73% respectively, of the Companys estimated reserves. DeGolyer and MacNaughton evaluated the proved oil
and natural gas reserve estimates in accordance with Rule 4-10 of Regulation S-X, promulgated by the SEC, and in accordance with the oil and gas reserves disclosure provisions of ASC 932 of the FASB Accounting Standards Codification (ASC) relating
to Extractive Activities-Oil and Gas (formerly SFAS no. 69 Disclosures about Oil and Gas Producing Activities). We provided all information required during the course of the evaluation process to the auditors satisfaction.



S-6



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##### Table of Contents

Proved reserves are estimated by the Companys reservoir engineers.
Reserves engineering is a subjective process of estimation of hydrocarbon accumulation, which cannot be accurately measured, and the reserve estimation depends on the quality of available information and the interpretation and judgment of the
engineers and geologists. Therefore, the reserves estimations, as well as future production profiles, are often different than the quantities of hydrocarbons which are finally recovered. The accuracy of such estimations depends, in general, on the
assumptions on which they are based.

The following table sets forth the estimated proved reserves of oil
(includes crude oil, condensate and natural gas liquids) and natural gas as of December 31, 2013, 2012 and 2011:



|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|------------------------------------------ |  | -------------------------------------------------------------------- | ------- | - | ------------------------------------- |  | - | --------- |  |  | ---------------------- | - |  | ---------------------- | --------- | - | ----- | -------------------- | ------- | - | --------- |  | -------- | --------- |  |  | - |  |  |  | ------ | - |  |  | ------- | - |  |  | -------- | -
|                                           |  | CRUDE OIL, CONDENSATE AND NATURAL GAS LIQUIDSIN THOUSANDS OF BARRELS |         |   | NATURAL GAS IN MILLIONS OF CUBIC FEET | 
|                                           |  | Consolidated companies                                               |         |   | Equity Method Investment              |  |   | Total     |  |  | Consolidated companies |   |  | EquityMethodInvestment |           |   | Total |                     
|Proved reserves (developedand undeveloped) |  | Argentina                                                            |         |   | Rest ofLatin-America                  |  |   | Argentina |  |  | Venezuela              |   |  |                        | Argentina |   |       | Rest ofLatin-America |         |   | Argentina |  |          | Venezuela | 
|Reserves as of December 31,2010 (*)        |  |                                                                      | 70,532  |   |                                       |  |  |           |  |  | 3,850                  |   |  |                        | 33,439    |   |       |                      | 107,821 |   |           |  | 775,275  |           |  |  |  |  |  |  | 8,260  |   |  |  | 59,721  |   |  |  | 843,256  |  
|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Increase (Decrease) originated in:         |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Revisions of previous estimates            |  |                                                                      | 90      |   |                                       |  |  |           |  |  | 73                     |   |  |                        | (1,071    | ) |       |                      | (908    | ) |           |  | (6,315   | )         |  |  |  |  |  |  | (250   | ) |  |  | (14,979 | ) |  |  | (21,544  | )
|Improved recovery                          |  |                                                                      | 1       |   |                                       |  |  |           |  |  | 5                      |   |  |                        |          |   |       |                      | 6       |   |           |  | 2        |           |  |  |  |  |  |  | 6      |   |  |  |        |   |  |  | 8        |  
|Extensions and discoveries                 |  |                                                                      | 2,033   |   |                                       |  |  |           |  |  | 662                    |   |  |                        |          |   |       |                      | 2,695   |   |           |  | 63,056   |           |  |  |  |  |  |  | 1,707  |   |  |  |        |   |  |  | 64,763   |  
|Purchase of proved reserves in place       |  |                                                                      |        |   |                                       |  |  |           |  |  |                       |   |  |                        |          |   |       |                      |        |   |           |  |         |           |  |  |  |  |  |  |       |   |  |  |        |   |  |  |         |  
|Sale of proved reserves in place           |  |                                                                      |        |   |                                       |  |  |           |  |  |                       |   |  |                        |          |   |       |                      |        |   |           |  |         |           |  |  |  |  |  |  |       |   |  |  |        |   |  |  |         |  
|Years production                          |  |                                                                      | (13,768 | ) |                                       |  |  |           |  |  | (782                   | ) |  |                        | (2,831    | ) |       |                      | (17,381 | ) |           |  | (99,365  | )         |  |  |  |  |  |  | (1,297 | ) |  |  | (1,290  | ) |  |  | (101,952 | )
|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Reserves as of December 31,2011 (*)        |  |                                                                      | 58,888  |   |                                       |  |  |           |  |  | 3,808                  |   |  |                        | 29,537    |   |       |                      | 92,233  |   |           |  | 732,653  |           |  |  |  |  |  |  | 8,426  |   |  |  | 43,452  |   |  |  | 784,531  |  
|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Increase (Decrease) originated in:         |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Revisions of previous estimates            |  |                                                                      | (2,662  | ) |                                       |  |  |           |  |  | 36                     |   |  |                        | (3,800    | ) |       |                      | (6,426  | ) |           |  | 22,024   |           |  |  |  |  |  |  | 96     |   |  |  | (4,913  | ) |  |  | 17,207   |  
|Extensions and discoveries                 |  |                                                                      | 4,393   |   |                                       |  |  |           |  |  | 272                    |   |  |                        | 1,130     |   |       |                      | 5,795   |   |           |  | 14,618   |           |  |  |  |  |  |  | 440    |   |  |  | 8,802   |   |  |  | 23,860   |  
|Purchase of proved reserves in place       |  |                                                                      | 19,674  |   |                                       |  |  |           |  |  | (3,779                 | ) |  |                        |          |   |       |                      | 15,895  |   |           |  | 43,686   |           |  |  |  |  |  |  | (8,391 | ) |  |  |        |   |  |  | 35,295   |  
|Sale of proved reserves in place           |  |                                                                      |        |   |                                       |  |  |           |  |  |                       |   |  |                        |          |   |       |                      |        |   |           |  |         |           |  |  |  |  |  |  |       |   |  |  |        |   |  |  |         |  
|Years production                          |  |                                                                      | (16,048 | ) |                                       |  |  |           |  |  | (337                   | ) |  |                        | (2,337    | ) |       |                      | (18,722 | ) |           |  | (100,515 | )         |  |  |  |  |  |  | (571   | ) |  |  | (886    | ) |  |  | (101,972 | )
|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Reserves as of December 31,2012 (*)        |  |                                                                      | 64,245  |   |                                       |  |  |           |  |  |                       |   |  |                        | 24,530    |   |       |                      | 88,775  |   |           |  | 712,466  |           |  |  |  |  |  |  |       |   |  |  | 46,455  |   |  |  | 758,921  |  
|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Increase (Decrease) originated in:         |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Revisions of previous estimates            |  |                                                                      | 67      |   |                                       |  |  |           |  |  |                       |   |  |                        | (1,086    | ) |       |                      | (1,019  | ) |           |  | 65,774   |           |  |  |  |  |  |  |       |   |  |  | (4,362  | ) |  |  | 61,412   |  
|Extensions and discoveries                 |  |                                                                      |        |   |                                       |  |  |           |  |  |                       |   |  |                        |          |   |       |                      |        |   |           |  |         |           |  |  |  |  |  |  |       |   |  |  |        |   |  |  |         |  
|Purchase of proved reserves in place       |  |                                                                      | 13,204  |   |                                       |  |  |           |  |  |                       |   |  |                        |          |   |       |                      | 13,204  |   |           |  | 9,260    |           |  |  |  |  |  |  |       |   |  |  |        |   |  |  | 9,260    |  
|Sale of proved reserves in place           |  |                                                                      |        |   |                                       |  |  |           |  |  |                       |   |  |                        |          |   |       |                      |        |   |           |  |         |           |  |  |  |  |  |  |       |   |  |  |        |   |  |  |         |  
|Years production                          |  |                                                                      | (16,675 | ) |                                       |  |  |           |  |  |                       |   |  |                        | (2,020    | ) |       |                      | (18,695 | ) |           |  | (92,213  | )         |  |  |  |  |  |  |       |   |  |  | (620    | ) |  |  | (92,833  | )
|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|Reserves as of December 31,2013 (*)        |  |                                                                      | 60,841  |   |                                       |  |  |           |  |  |                       |   |  |                        | 21,424    |   |       |                      | 82,265  |   |           |  | 695,287  |           |  |  |  |  |  |  |       |   |  |  | 41,473  |   |  |  | 736,760  |  
|                                           |  |                                                                      |         |   |                                       |  |   |           |  |  |                        |   |  |                        |           |   |       |                      |         |   |           |  |          |           |  |  |   |  |  |  |        |   |  |  |         |   |  |  |          |  
|                                          
|(*)    Includesproved developed reserves:  | 
|                                           |  |                                                                      |         |   |                                       |  |   |           |  | 
|As of December 31, 2011                    |  |                                                                      | 41,789  |   |                                       |  |  |           |  |  | 2,993                  |   |  |                        | 17,484    |   |       |                      | 62,266  |   |           |  | 351,273  |           |  |  |  |  |  |  | 6,754  |   |  |  | 20,179  |   |  |  | 378,206  |  
|As of December 31, 2012                    |  |                                                                      | 48,936  |   |                                       |  |  |           |  |  |                       |   |  |                        | 12,670    |   |       |                      | 61,606  |   |           |  | 358,319  |           |  |  |  |  |  |  |       |   |  |  | 14,582  |   |  |  | 372,901  |  
|As of December 31, 2013                    |  |                                                                      | 43,802  |   |                                       |  |  |           |  |  |                       |   |  |                        | 12,448    |   |       |                      | 56,250  |   |           |  | 320,642  |           |  |  |  |  |  |  |       |   |  |  | 14,868  |   |  |  | 335,510  |  

Bolivian proved reserves were not classified as such in 2013, 2012 and 2011 due to
changes introduced to the Bolivian Constitution, which restrict the disclosure of estimated reserves for properties under its authority.

The estimated reserves were subjected to economic evaluation to determine their economic limits. Such estimated reserves in Argentina for years ended in 2013, 2012 and 2011 are stated prior to the payment
of any royalties as they have the same impact as taxes on production and are not paid in kind, and therefore are treated as operating costs.

In Venezuela, as of December 31, 2013, 2012 and 2011, estimated reserves were calculated on the basis of the contractual structure in force, and are stated before royalties and are computed by
multiplying our ownership in each mixed company by the proved reserve volumes of the relevant mixed company.



S-7



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##### Table of Contents

|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|---------------------------------------------- |  | ------------------------------------------ | ------ |  | ------------------------ |  | ------- | ------------------------------------------ |  |  | ------------------------ |  |  | ------------------------------------------ | ------- |  | ------------------------ |  | ------ |  |  |  | ------- | 
|                                               |  | 2013                                       |        |  | 2012                     |  |         | 2011                                       | 
|                                               |  | Crude Oil,Condensate andNatural GasLiquids |        |  | NaturalGas               |  |         | Crude Oil,Condensate andNatural GasLiquids |  |  | NaturalGas               |  |  | Crude Oil,Condensate andNatural GasLiquids |         |  | NaturalGas               | 
|                                               |  | In thousands ofbarrels                     |        |  | In millions ofcubic feet |  |         | In thousands ofbarrels                     |  |  | In millions ofcubic feet |  |  | In thousands ofbarrels                     |         |  | In millions ofcubic feet | 
|Net proved developed reserves:                 |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Consolidated entities                          |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Argentina                                      |  |                                            | 43,802 |  |                          |  | 320,642 |                                            |  |  | 48,936                   |  |  |                                            | 358,319 |  |                          |  | 41,789 |  |  |  | 351,273 | 
|Rest of Latin-America                          |  |                                            |       |  |                          |  |        |                                            |  |  |                         |  |  |                                            |        |  |                          |  |       |  |  |  |        | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|                                               |  |                                            | 43,802 |  |                          |  | 320,642 |                                            |  |  | 48,936                   |  |  |                                            | 358,319 |  |                          |  | 41,789 |  |  |  | 351,273 | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Equity method investees                        |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Argentina                                      |  |                                            |       |  |                          |  |        |                                            |  |  |                         |  |  |                                            |        |  |                          |  | 2,993  |  |  |  | 6,754   | 
|Venezuela                                      |  |                                            | 12,448 |  |                          |  | 14,868  |                                            |  |  | 12,670                   |  |  |                                            | 14,582  |  |                          |  | 17,484 |  |  |  | 20,179  | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|                                               |  |                                            | 12,448 |  |                          |  | 14,868  |                                            |  |  | 12,670                   |  |  |                                            | 14,582  |  |                          |  | 20,477 |  |  |  | 26,933  | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Total consolidated and equity method investees |  |                                            | 56,250 |  |                          |  | 335,510 |                                            |  |  | 61,606                   |  |  |                                            | 372,901 |  |                          |  | 62,266 |  |  |  | 378,206 | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Net proved undeveloped reserves:               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Consolidated entities                          |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Argentina                                      |  |                                            | 17,039 |  |                          |  | 374,645 |                                            |  |  | 15,309                   |  |  |                                            | 354,147 |  |                          |  | 17,099 |  |  |  | 381,380 | 
|Rest of Latin-America                          |  |                                            |       |  |                          |  |        |                                            |  |  |                         |  |  |                                            |        |  |                          |  |       |  |  |  |        | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|                                               |  |                                            | 17,039 |  |                          |  | 374,645 |                                            |  |  | 15,309                   |  |  |                                            | 354,147 |  |                          |  | 17,099 |  |  |  | 381,380 | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Equity method investees                        |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Argentina                                      |  |                                            |       |  |                          |  |        |                                            |  |  |                         |  |  |                                            |        |  |                          |  | 815    |  |  |  | 1,672   | 
|Venezuela                                      |  |                                            | 8,976  |  |                          |  | 26,605  |                                            |  |  | 11,860                   |  |  |                                            | 31,873  |  |                          |  | 12,053 |  |  |  | 23,273  | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|                                               |  |                                            | 8,976  |  |                          |  | 26,605  |                                            |  |  | 11,860                   |  |  |                                            | 31,873  |  |                          |  | 12,868 |  |  |  | 24,945  | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 
|Total consolidated and equity method investees |  |                                            | 26,015 |  |                          |  | 401,250 |                                            |  |  | 27,169                   |  |  |                                            | 386,020 |  |                          |  | 29,967 |  |  |  | 406,325 | 
|                                               |  |                                            |        |  |                          |  |         |                                            |  |  |                          |  |  |                                            |         |  |                          |  |        |  |  |  |         | 

Standardized measure of discounted future net cash flows

The following table discloses estimated future net cash flows from future production of proved developed and undeveloped
reserves of crude oil, condensate, natural gas liquids and natural gas. As prescribed by SEC Modernization of Oil and Gas Reporting rules and ASC 932 of the FASB Accounting Standards Codification (ASC) relating to Extractive Activities  Oil
and Gas (formerly SFAS no. 69 Disclosures about Oil and Gas Producing Activities), such future net cash flows were estimated using the average first-day-of-the-month price during the 12-month period for 2013, 2012 and 2011 and using a 10% annual
discount factor. Future development and abandonment costs include estimated drilling costs, development and exploitation installations and abandonment costs. These future development costs were estimated based on evaluations made by the Company and
the operators of the fields in which the Company has an interest. The future income tax was calculated by applying the tax rate in effect as of the date this supplementary information was filed.

This standardized measure is not intended to be and should not be interpreted as an estimate of the market value of the
Companys reserves. The purpose of this information is to give standardized data to help the users of the financial statements to compare different companies and make certain projections. It is important to point out that this information does
not include, among other items, the effect of future changes in prices, costs and tax rates, which past experience indicates that are likely to occur, as well as the effect of future cash flows from reserves which have not yet been classified as
proved reserves, of a discount factor more representative of the value of money over the lapse of time and of the risks inherent to the production of oil and gas. These future changes may have a significant impact on the future net cash flows
disclosed below. For all these reasons, this information does not necessarily indicate the perception the Company has on the discounted future net cash flows derived from the reserves of hydrocarbons.



S-8



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##### Table of Contents

|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|-------------------------------------------------------- |  | --------------------------------------- | ------- | - | ------------------------ |  | ----- | ----- |  |  | --------- | - |  | --------- | ----- | - | ----- |  | ------ | - |  |  | ------ | -
|                                                         |  | Consolidated companies                  |         |   | Equity Method Investment | 
|                                                         |  | Argentina                               |         |   | Rest ofLatin-America     |  |       | Total |  |  | Argentina |   |  | Venezuela |       |   | Total | 
|                                                         |  | (Stated in millions of Argentine pesos) |        
|At December 31, 2013                                     |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Future cash flows                                        |  |                                         | 39,279  |   |                          |  | 1,055 |       |  |  | 40,334    |   |  |           |      |   |       |  | 12,291 |   |  |  | 12,291 |  
|Future production costs                                  |  |                                         | (20,993 | ) |                          |  | (770  | )     |  |  | (21,763   | ) |  |           |      |   |       |  | (9,073 | ) |  |  | (9,073 | )
|Future development and abandonment costs                 |  |                                         | (6,490  | ) |                          |  | (185  | )     |  |  | (6,675    | ) |  |           |      |   |       |  | (843   | ) |  |  | (843   | )
|Future income tax                                        |  |                                         | (3,009  | ) |                          |  | (60   | )     |  |  | (3,069    | ) |  |           |      |   |       |  | (535   | ) |  |  | (535   | )
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Undiscounted future net cash flows                       |  |                                         | 8,787   |   |                          |  | 40    |       |  |  | 8,827     |   |  |           |      |   |       |  | 1,840  |   |  |  | 1,840  |  
|10% annual discount                                      |  |                                         | (2,328  | ) |                          |  | 29    |       |  |  | (2,299    | ) |  |           |      |   |       |  | (652   | ) |  |  | (652   | )
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Standardized measure of discounted future net cash flows |  |                                         | 6,459   |   |                          |  | 69    |       |  |  | 6,528     |   |  |           |      |   |       |  | 1,188  |   |  |  | 1,188  |  
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|At December 31, 2012                                     |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Future cash flows                                        |  |                                         | 29,877  |   |                          |  | 949   |       |  |  | 30,826    |   |  |           |      |   |       |  | 11,130 |   |  |  | 11,130 |  
|Future production costs                                  |  |                                         | (14,050 | ) |                          |  | (597  | )     |  |  | (14,647   | ) |  |           |      |   |       |  | (8,165 | ) |  |  | (8,165 | )
|Future development and abandonment costs                 |  |                                         | (5,073  | ) |                          |  | (73   | )     |  |  | (5,146    | ) |  |           |      |   |       |  | (647   | ) |  |  | (647   | )
|Future income tax                                        |  |                                         | (2,754  | ) |                          |  | (81   | )     |  |  | (2,835    | ) |  |           |      |   |       |  | (519   | ) |  |  | (519   | )
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Undiscounted future net cash flows                       |  |                                         | 8,000   |   |                          |  | 198   |       |  |  | 8,198     |   |  |           |      |   |       |  | 1,799  |   |  |  | 1,799  |  
|10% annual discount                                      |  |                                         | (1,948  | ) |                          |  | (75   | )     |  |  | (2,023    | ) |  |           |      |   |       |  | (609   | ) |  |  | (609   | )
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Standardized measure of discounted future net cash flows |  |                                         | 6,052   |   |                          |  | 123   |       |  |  | 6,175     |   |  |           |      |   |       |  | 1,190  |   |  |  | 1,190  |  
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|At December 31, 2011                                     |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Future cash flows                                        |  |                                         | 21,723  |   |                          |  | 820   |       |  |  | 22,543    |   |  |           | 1,035 |   |       |  | 9,776  |   |  |  | 10,811 |  
|Future production costs                                  |  |                                         | (10,343 | ) |                          |  | (572  | )     |  |  | (10,915   | ) |  |           | (432  | ) |       |  | (5,179 | ) |  |  | (5,611 | )
|Future development and abandonment costs                 |  |                                         | (3,169  | ) |                          |  | (76   | )     |  |  | (3,245    | ) |  |           | (138  | ) |       |  | (255   | ) |  |  | (393   | )
|Future income tax                                        |  |                                         | (2,030  | ) |                          |  | (63   | )     |  |  | (2,093    | ) |  |           | (124  | ) |       |  | (1,466 | ) |  |  | (1,590 | )
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Undiscounted future net cash flows                       |  |                                         | 6,181   |   |                          |  | 109   |       |  |  | 6,290     |   |  |           | 341   |   |       |  | 2,876  |   |  |  | 3,217  |  
|10% annual discount                                      |  |                                         | (1,472  | ) |                          |  | (12   | )     |  |  | (1,484    | ) |  |           | (91   | ) |       |  | (960   | ) |  |  | (1,051 | )
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  
|Standardized measure of discounted future net cash flows |  |                                         | 4,709   |   |                          |  | 97    |       |  |  | 4,806     |   |  |           | 250   |   |       |  | 1,916  |   |  |  | 2,166  |  
|                                                         |  |                                         |         |   |                          |  |       |       |  |  |           |   |  |           |       |   |       |  |        |   |  |  |        |  



S-9



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##### Table of Contents

Changes in the standardized measure of discounted future net cash flows

The following table discloses the changes in the standardized measure of discounted future net cash flows for the years
ended December 31, 2013, 2012 and 2011:



|                                                                                             |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|-------------------------------------------------------------------------------------------- |  | --------------------------------------- | ------ | - | ------------------------ |  | ---- | ----- |  |  | --------- | - |  | --------- | - |  | ----- |  | ----- | - |  |  | ----- | -
|                                                                                             |  | Consolidated companies                  |        |   | Equity Method Investment | 
|                                                                                             |  | Argentina                               |        |   | Rest ofLatin-America     |  |      | Total |  |  | Argentina |   |  | Venezuela |   |  | Total | 
|                                                                                             |  | (Stated in millions of Argentine pesos) |       
|Standardized measure at December 31, 2012                                                    |  |                                         | 6,052  |   |                          |  | 123  |       |  |  | 6,175     |   |  |           |  |  |       |  | 1,190 |   |  |  | 1,190 |  
|                                                                                             |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Changes related to oil & gas activities:                                                     |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Hydrocarbons sales net of production costs                                                   |  |                                         | (3,955 | ) |                          |  | (103 | )     |  |  | (4,058    | ) |  |           |  |  |       |  | (573  | ) |  |  | (573  | )
|Net change in sales prices, net of future production costs                                   |  |                                         | (744   | ) |                          |  | 1    |       |  |  | (743      | ) |  |           |  |  |       |  | 137   |   |  |  | 137   |  
|Changes in future development costs                                                          |  |                                         | (1,884 | ) |                          |  | (100 | )     |  |  | (1,984    | ) |  |           |  |  |       |  | (237  | ) |  |  | (237  | )
|Extensions, discoveries and improved recovery, net of future production and associated costs |  |                                         |       |   |                          |  |     |       |  |  |          |   |  |           |  |  |       |  |      |   |  |  |      |  
|Development costs incurred                                                                   |  |                                         | 2,087  |   |                          |  | 31   |       |  |  | 2,118     |   |  |           |  |  |       |  | 240   |   |  |  | 240   |  
|Revisions of quantity estimates                                                              |  |                                         | 324    |   |                          |  | 12   |       |  |  | 336       |   |  |           |  |  |       |  | (106  | ) |  |  | (106  | )
|Purchase of reserves in place                                                                |  |                                         | 1,768  |   |                          |  |     |       |  |  | 1,768     |   |  |           |  |  |       |  |      |   |  |  |      |  
|Net change in income taxes                                                                   |  |                                         | 527    |   |                          |  | 25   |       |  |  | 552       |   |  |           |  |  |       |  | 76    |   |  |  | 76    |  
|Accretion of discount                                                                        |  |                                         | 1,094  |   |                          |  | 23   |       |  |  | 1,117     |   |  |           |  |  |       |  | 200   |   |  |  | 200   |  
|Changes in production rates                                                                  |  |                                         | (227   | ) |                          |  | 16   |       |  |  | (211      | ) |  |           |  |  |       |  |      |   |  |  |      |  
|Other changes                                                                                |  |                                         | 1,417  |   |                          |  | 41   |       |  |  | 1,458     |   |  |           |  |  |       |  | 261   |   |  |  | 261   |  
|                                                                                             |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  
|Standardized measure at December 31, 2013                                                    |  |                                         | 6,459  |   |                          |  | 69   |       |  |  | 6,528     |   |  |           |  |  |       |  | 1,188 |   |  |  | 1,188 |  
|                                                                                             |  |                                         |        |   |                          |  |      |       |  |  |           |   |  |           |   |  |       |  |       |   |  |  |       |  



S-10



---

##### Table of Contents

|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |        |   |  |  |        |  
|-------------------------------------------------------------------------------------------- |  | --------------------------------------- | ------ | - | ------------------------ |  | --- | ----- |  |  | --------- | - |  | --------- | ---- | - | ----- |  | ------ | - |  |  | ------ | -
|                                                                                             |  | Consolidated companies                  |        |   | Equity Method Investment | 
|                                                                                             |  | Argentina                               |        |   | Rest ofLatin-America     |  |     | Total |  |  | Argentina |   |  | Venezuela |      |   | Total | 
|                                                                                             |  | (Stated in millions of Argentine pesos) |       
|Standardized measure at December 31, 2011                                                    |  |                                         | 4,709  |   |                          |  | 97  |       |  |  | 4,806     |   |  |           | 250  |   |       |  | 1,916  |   |  |  | 2,166  |  
|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |        |   |  |  |        |  
|Changes related to oil & gas activities:                                                     |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |        |   |  |  |        |  
|Hydrocarbons sales net of production costs                                                   |  |                                         | (3,061 | ) |                          |  | (86 | )     |  |  | (3,147    | ) |  |           | (71  | ) |       |  | (381   | ) |  |  | (452   | )
|Net change in sales prices, net of future production costs                                   |  |                                         | 897    |   |                          |  | 116 |       |  |  | 1,013     |   |  |           | 56   |   |       |  | (1,185 | ) |  |  | (1,129 | )
|Changes in future development costs                                                          |  |                                         | (1,947 | ) |                          |  | (15 | )     |  |  | (1,962    | ) |  |           | (45  | ) |       |  | (384   | ) |  |  | (429   | )
|Extensions, discoveries and improved recovery, net of future production and associated costs |  |                                         | 855    |   |                          |  |    |       |  |  | 855       |   |  |           | 29   |   |       |  | 187    |   |  |  | 216    |  
|Development costs incurred                                                                   |  |                                         | 1,576  |   |                          |  | 26  |       |  |  | 1,602     |   |  |           | 30   |   |       |  | 95     |   |  |  | 125    |  
|Revisions of quantity estimates                                                              |  |                                         | 17     |   |                          |  |    |       |  |  | 17        |   |  |           | (1   | ) |       |  | (237   | ) |  |  | (238   | )
|Purchase of reserves in place                                                                |  |                                         | 1,196  |   |                          |  |    |       |  |  | 1,196     |   |  |           |     |   |       |  |       |   |  |  |       |  
|Net change in income taxes                                                                   |  |                                         | 262    |   |                          |  | (2  | )     |  |  | 260       |   |  |           | (22  | ) |       |  | 767    |   |  |  | 745    |  
|Accretion of discount                                                                        |  |                                         | 916    |   |                          |  | 16  |       |  |  | 932       |   |  |           | 17   |   |       |  | 328    |   |  |  | 345    |  
|Changes in production rates                                                                  |  |                                         | 429    |   |                          |  | (67 | )     |  |  | 362       |   |  |           | 35   |   |       |  | (83    | ) |  |  | (48    | )
|Other changes                                                                                |  |                                         | 203    |   |                          |  | 38  |       |  |  | 241       |   |  |           | (278 | ) |       |  | 167    |   |  |  | (111   | )
|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |        |   |  |  |        |  
|Standardized measure at December 31, 2012                                                    |  |                                         | 6,052  |   |                          |  | 123 |       |  |  | 6,175     |   |  |           |     |   |       |  | 1,190  |   |  |  | 1,190  |  
|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |        |   |  |  |        |  



S-11



---

##### Table of Contents

|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|-------------------------------------------------------------------------------------------- |  | --------------------------------------- | ------ | - | ------------------------ |  | --- | ----- |  |  | --------- | - |  | --------- | ---- | - | ----- |  | ----- | - |  |  | ----- | -
|                                                                                             |  | Consolidated companies                  |        |   | Equity Method Investment | 
|                                                                                             |  | Argentina                               |        |   | Rest ofLatin-America     |  |     | Total |  |  | Argentina |   |  | Venezuela |      |   | Total | 
|                                                                                             |  | (Stated in millions of Argentine pesos) |       
|Standardized measure at December 31, 2010                                                    |  |                                         | 4,573  |   |                          |  | 128 |       |  |  | 4,701     |   |  |           | 217  |   |       |  | 1,292 |   |  |  | 1,509 |  
|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|Changes related to oil & gas activities:                                                     |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|Hydrocarbons sales net of production costs                                                   |  |                                         | (1,951 | ) |                          |  | (91 | )     |  |  | (2,042    | ) |  |           | (118 | ) |       |  | (520  | ) |  |  | (638  | )
|Net change in sales prices, net of future production costs                                   |  |                                         | 254    |   |                          |  | (13 | )     |  |  | 241       |   |  |           | 16   |   |       |  | 831   |   |  |  | 847   |  
|Changes in future development costs                                                          |  |                                         | (852   | ) |                          |  | 28  |       |  |  | (824      | ) |  |           | (74  | ) |       |  | (49   | ) |  |  | (123  | )
|Extensions, discoveries and improved recovery, net of future production and associated costs |  |                                         | 510    |   |                          |  |    |       |  |  | 510       |   |  |           | 77   |   |       |  |      |   |  |  | 77    |  
|Development costs incurred                                                                   |  |                                         | 1,212  |   |                          |  | 21  |       |  |  | 1,233     |   |  |           | 66   |   |       |  | 98    |   |  |  | 164   |  
|Revisions of quantity estimates                                                              |  |                                         | (135   | ) |                          |  | (22 | )     |  |  | (157      | ) |  |           | 2    |   |       |  | (161  | ) |  |  | (159  | )
|Purchase of reserves in place                                                                |  |                                         |       |   |                          |  |    |       |  |  |          |   |  |           |     |   |       |  |      |   |  |  |      |  
|Net change in income taxes                                                                   |  |                                         | 136    |   |                          |  | 19  |       |  |  | 155       |   |  |           | (2   | ) |       |  | (26   | ) |  |  | (28   | )
|Accretion of discount                                                                        |  |                                         | 673    |   |                          |  | 20  |       |  |  | 693       |   |  |           | 33   |   |       |  | 233   |   |  |  | 266   |  
|Changes in production rates                                                                  |  |                                         | (7     | ) |                          |  | 25  |       |  |  | 18        |   |  |           | (6   | ) |       |  | (30   | ) |  |  | (36   | )
|Other changes                                                                                |  |                                         | 296    |   |                          |  | (18 | )     |  |  | 278       |   |  |           | 39   |   |       |  | 248   |   |  |  | 287   |  
|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  
|Standardized measure at December 31, 2011                                                    |  |                                         | 4,709  |   |                          |  | 97  |       |  |  | 4,806     |   |  |           | 250  |   |       |  | 1,916 |   |  |  | 2,166 |  
|                                                                                             |  |                                         |        |   |                          |  |     |       |  |  |           |   |  |           |      |   |       |  |       |   |  |  |       |  



S-12