+-----------------------------------------------------------------------+
| 19 Attachment 3: Supplem                                              |
| ental Information on Petroleum Exploration and Production Activities  |
|                                                                       |
| Under the US Financial Accounting Standard no. 69 (FAS 69) and other  |
| information – Unaudited                                               |
+-----------------------------------------------------------------------+

19.1 PTTEP and its Subsidiaries’ Petroleum Reserves Report As of
December 31, 2004

The total Proved Reserves of PTT Exploration and Production Public
Company Limited (PTTEP) and its Subsidiaries as of December 31, 2004 are
shown in the attached table. The Proved Reserves are reviewed annually
by company’s earth scientists and reservoir engineers to ensure rigorous
professional standards. The Proved Reserves are reported on a gross
basis, which includes the company’s net working interest and related
host country’s interest.

No reserve quantities have been recorded for the company on Blocks B,
48/95, 52/97, 9-2, and 16-1 Projects in offshore Vietnam because no
commercial arrangement has been established for the discoveries.

The total Proved Reserves (Consolidated Companies) as of December 31,
2004 of PTTEP and its subsidiaries are 139 Million Stock Tank Barrels
(MMSTB) for crude oil and condensate, and 5,011 Billion Standard Cubic
Feet (BSCF) for gas. The total Proved Reserves (Consolidated Companies)
in term of oil equivalent is 899 Million Barrels (MMBOE).

The total production in 2004 (Consolidated Companies) is 56 MMBOE or
equivalent to the production rate of approximately 154,000 Barrels of
Oil Equivalent per Day (BOED) , approximately 34,000 BOED or 28%
increase from last year. The production increase was mainly attributed
to the increase of petroleum production from Bongkot, Yadana, and
Yetagun projects and the increased interest in S1 project.

PTTEP indirectly holds 34.20% interest in PT. Medco Energi Internasional
Tbk. (Medco), an Indonesia upstream oil and gas exploration and
production company. PTTEP’s share of Medco’s Proved Reserves are 36
MMSTB for crude and condensate, and 165 BSCF for gas. The total Proved
Reserves in term of oil equivalent is 64 Million Barrels (MMBOE).
(Medco’s Proved Reserves were based on Gaffney, Cline & Associates
(Consultants) Pte. Ltd.(GCA)’s estimated as of January 1, 2004
subtracted by total 2004 production. GCA’s estimation for end of 2004
has not been completed.)

The total PTTEP’s worldwide Proved Reserves as of December 31, 2004,
including investment in Medco are 175 MMSTB for crude and condensate,
and 5,176 BSCF for gas, or approximately 963 MMBOE.

[TABLE]

(1) The Proved Reserves are reported on a gross basis which includes the
    company's net working interest and the related host country
    interest.

(2) Includes JDA Project

(3) PTTEP indirectly holds 34.20% interest in Medco. Medco's proved
    reserves were based on Gaffney, Cline & Associates (Consultants)
    Pte. Ltd.'s estimated as of January 1, 2004 subtracted by total 2004
    production.

  As at 29^(th) January 2005 PTTEPO, a subsidiary of PTTEP, has signed a
  Conditional Share Purchase Agreement to sell its entire shareholdings
  in New Links Energy Resources Limited to Encore Int’l Limited
  (Encore). Encore, also a current shareholder, is choosing to exercise
  its pre-emptive right to purchase the aforementioned shares.

(4) PTTEP's interest in S1 Project increased from 25% to 100%.

19.2 Capitalized costs relating to oil and gas producing activities

Capitalized costs represent cumulative expenditures for proved and
unproved properties, and support equipment and facilities used in oil
and gas exploration and production operations together with related
accumulated depreciation, depletion and amortization.

Proved properties include exploration & development wells, equipment,
transportation pipeline and related producing facilities associated with
proved reserves project. Unproved properties represent amounts
associated with non-proved reserve project. Support equipment and
facilities include warehouse, field offices, vehicles and movable assets
used in oil and gas producing activities.

The net capitalized costs represent the undepreciated value for these
assets.

  -------------------------------------------- -------------- ------------
  (Million Baht)                               2004           2003

  Proved properties                            100,341        71,892

  Unproved properties                          1,755          1,105

  Accrued decommissioning costs                5,875          4,293

  Support equipment and facilities             620            325

  Gross capitalized costs                      108,591        77,615

  Accumulated depreciation, depletion, and     (46,561)       (25,690)
  amortization                                                

  Net capitalized costs                        62,030         51,925

  Capitalized costs of equity company ⁽¹⁾      10,358         4,724
  -------------------------------------------- -------------- ------------

(1) Represents PTTEP’s share of net capitalized costs of investment in
    Medco

  As at 29^(th) January 2005 PTTEPO, a subsidiary of PTTEP, has signed a
  Conditional Share Purchase Agreement to sell its entire shareholdings
  in New Links Energy Resources Limited to Encore Int’l Limited
  (Encore). Encore, also a current shareholder, is choosing to exercise
  its pre-emptive right to purchase the aforementioned shares.

19.3 Costs Incurred in oil and gas property acquisition, exploration,
and development activities

  Costs incurred represent amounts both capitalized and charged to
  expense during the year. Property acquisition costs include costs to
  purchase proved and unproved properties.

  Exploration costs include the costs of geological and geophysical
  work, carrying and retaining undeveloped properties, and drilling and
  equipping exploratory wells.

  Development costs include costs associated with drilling and equipping
  development wells, improved recovery systems, facilities for
  extraction, treating, gathering and storage, producing facilities for
  existing developed reserves, and costs associated with transportation
  pipeline.

+------------------------+------+------+------+------+------+------+
|                        | 2004 |      |      | 2003 |      |      |
+------------------------+------+------+------+------+------+------+
| (Million Baht)         | Dome | For  | T    | Dome | For  | T    |
|                        | stic | eign | otal | stic | eign | otal |
+------------------------+------+------+------+------+------+------+
| Acquisition of         |      |      |      |      |      |      |
| properties             |      |      |      |      |      |      |
+------------------------+------+------+------+------+------+------+
| - Proved               | 5    | -    | 5    | -    | 1    | 1    |
|                        | ,597 |      | ,597 |      | ,558 | ,558 |
+------------------------+------+------+------+------+------+------+
| - Unproved             | 44   |      | 259  | -    | -    | -    |
|                        |      |  215 |      |      |      |      |
+------------------------+------+------+------+------+------+------+
| Exploration costs ⁽¹⁾  | 1    |      | 1    | 45   | 2    | 2    |
|                        | ,036 |  475 | ,511 |      | ,246 | ,291 |
+------------------------+------+------+------+------+------+------+
| Development costs      | 5    |      | 6    | 4    | 1    | 5    |
|                        | ,606 |  786 | ,392 | ,511 | ,466 | ,977 |
+------------------------+------+------+------+------+------+------+
| Total                  | 12   |   1  | 13   | 4    | 5    | 9    |
|                        | ,283 | ,476 | ,759 | ,556 | ,270 | ,826 |
+------------------------+------+------+------+------+------+------+
| Costs incurred of      | -    |   6  | 6    | -    | 1    | 1    |
| equity Company⁽²⁾      |      | ,725 | ,725 |      | ,158 | ,158 |
+------------------------+------+------+------+------+------+------+
|                        |      |      |      |      |      |      |
+------------------------+------+------+------+------+------+------+

(1) Exploration costs include transferring of exploration well costs to
    development well costs for future production.

(2) Represents PTTEP’s share of costs incurred of investment in Medco
    accounted for under equity method

19.4 Results of operation for producing activities

  Results of operations from oil and gas producing activities for the
  year 2004 and 2003 are shown in the following table.

  Operating costs include lifting costs incurred to operate and maintain
  productive wells and related equipment. Exploration expenses consist
  of geological and geophysical costs, and dry hole costs. General
  administrative expenses are expenses directly related to oil and gas
  producing activities. Depreciation, Depletion and Amortization expense
  relates to capitalized costs incurred in acquisition, exploration and
  development activities, transportation pipeline, including amortized
  decommissioning costs.

  Other income/expenses include pipeline transportation income and
  foreign exchange gains and losses.

  Income tax expenses are based on the tax effects arising from the
  operations.

  General corporate overhead and interest costs are excluded from the
  results of operations.

+-------------------------------+------+-----+------+-----+-----+-----+
|                               | 2004 |     |      | 2   |     |     |
|                               |      |     |      | 003 |     |     |
+===============================+======+=====+======+=====+=====+=====+
| (Million Baht)                | Dome | F   | T    | Do  | F   | To  |
|                               | stic | ore | otal | mes | ore | tal |
|                               |      | ign |      | tic | ign |     |
+-------------------------------+------+-----+------+-----+-----+-----+
| Gross revenues :              |      |     |      |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+
|  Total Sales                  | 39   | 6,  | 46   | 27, | 6,  | 34, |
|                               | ,299 | 900 | ,199 | 193 | 845 | 038 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Expenses :                    |      |     |      |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+
| Operating expenses            | 2    | 642 | 3    | 1,  | 547 | 2,  |
|                               | ,945 |     | ,587 | 842 |     | 389 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Exploration expenses          | 107  | 294 | 401  | 56  | 2,  | 2,  |
|                               |      |     |      |     | 256 | 312 |
+-------------------------------+------+-----+------+-----+-----+-----+
|   General administrative      | 782  | 446 | 1    | 455 | 271 | 726 |
|   expenses                    |      |     | ,228 |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+
|   Petroleum royalties         | 4    | 754 | 5    | 3,  | 641 | 4,  |
|                               | ,914 |     | ,668 | 380 |     | 201 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Depreciation, depletion and   | 7    | 642 | 7    | 4,  | 500 | 5,  |
| amortization                  | ,291 |     | ,933 | 702 |     | 202 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Other (income)/ expenses      | (    | (   | (1,  | (   | (9  | (9  |
|                               | 118) | 1,6 | 727) | 33) | 38) | 71) |
|                               |      | 09) |      |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+
| Total expenses                | 15   | 1,  | 17   | 10, | 3,  | 13, |
|                               | ,921 | 169 | ,090 | 402 | 277 | 679 |
+-------------------------------+------+-----+------+-----+-----+-----+
|   Results before income taxes | 23   | 5,  | 29   | 16, | 3,  | 20, |
|                               | ,378 | 731 | ,109 | 791 | 568 | 359 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Income tax expenses           | 9    | 1,  | 11   | 6,  | 1,  | 8,  |
|                               | ,766 | 704 | ,470 | 696 | 897 | 593 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Net results of operations     | 13   | 4,  | 17   | 10, | 1,  | 11, |
|                               | ,612 | 027 | ,639 | 095 | 671 | 766 |
+-------------------------------+------+-----+------+-----+-----+-----+
| Results of operations of      | -    | 154 | 154  | -   | 480 | 480 |
| equity company⁽¹⁾             |      |     |      |     |     |     |
+-------------------------------+------+-----+------+-----+-----+-----+

  ⁽¹⁾Represents PTTEP’s share of results of operations of investment in
  Medco

19.5 Standardized Measure of Discounted Future Net Cash Flows Relating
to Proved Oil and Gas Reserves

  The standardized measure of discounted future net cash flows, related
  to the above proved oil and gas reserves, is computed by applying
  year-end prices of oil and gas (with consideration of price changes
  only to the extent provided by contractual arrangements) to the
  estimated future production of year-end proved oil and gas reserves
  remaining less estimated future expenditures (based on year-end costs)
  to be incurred in developing and production the proved reserves,
  discounted using a rate of 10% per year to reflect the estimated
  timing of the future cash flows. Future income taxes are calculated by
  applying the appropriate year-end statutory tax rates to the future
  pre tax net cash flows and reduced by applicable tax deductions or tax
  credits.

  Discounted future cash flow estimates like those shown below are not
  intended to represent estimates of the fair value of oil and gas
  properties. Estimates of fair value should also consider probable and
  possible which may become proved reserves in the future, anticipated
  future oil and gas prices, interest rates, changes in development and
  production costs and risks associated with future production. Because
  of these and other considerations, any of fair value is necessarily
  subjective and imprecise.

+----------------------+-------+-------+------+------+-----+------+
| (Million Baht)       | 2004  |       |      | 2003 |     |      |
+----------------------+-------+-------+------+------+-----+------+
|                      | Dom   | Fo    | T    | Dome | F   | T    |
|                      | estic | reign | otal | stic | ore | otal |
|                      |       |       |      |      | ign |      |
+----------------------+-------+-------+------+------+-----+------+
| Future cash inflows  | 44    | 16    | 606  | 383  | 1   | 547  |
|                      | 4,327 | 2,244 | ,571 | ,121 | 64, | ,993 |
|                      |       |       |      |      | 872 |      |
+----------------------+-------+-------+------+------+-----+------+
| Future production    | (61   | (20   | (82, | (50, | (2  | (71, |
| costs                | ,511) | ,821) | 332) | 172) | 1,5 | 725) |
|                      |       |       |      |      | 53) |      |
+----------------------+-------+-------+------+------+-----+------+
| Future development   | (108  | (6    | (    | (92, | (   | (99, |
| costs                | ,972) | ,530) | 115, | 504) | 6,6 | 200) |
|                      |       |       | 502) |      | 96) |      |
+----------------------+-------+-------+------+------+-----+------+
| Future income tax    | (90   | (50   | (    | (81, | (4  | (    |
| expenses             | ,534) | ,059) | 140, | 203) | 9,1 | 130, |
|                      |       |       | 593) |      | 04) | 307) |
+----------------------+-------+-------+------+------+-----+------+
| Future net cash      | 18    | 8     | 268  | 159  | 87, | 246  |
| flows                | 3,310 | 4,834 | ,144 | ,241 | 520 | ,761 |
+----------------------+-------+-------+------+------+-----+------+
| 10% annual discount  | (83   | (47   | (    | (78, | (5  | (    |
|                      | ,998) | ,576) | 131, | 957) | 1,4 | 130, |
|                      |       |       | 574) |      | 78) | 435) |
+----------------------+-------+-------+------+------+-----+------+
| Standardized measure |       |       |      |      |     |      |
| of discounted        |       |       |      |      |     |      |
+----------------------+-------+-------+------+------+-----+------+
| future net cash      | 9     | 3     | 136  | 80   | 36, | 116  |
| flows (SMDCF)        | 9,312 | 7,258 | ,570 | ,283 | 043 | ,326 |
+----------------------+-------+-------+------+------+-----+------+
| SMDCF of equity      | -     | 5,587 | 5    | -    | 4,  | 4    |
| company ⁽¹⁾          |       |       | ,587 |      | 038 | ,038 |
+----------------------+-------+-------+------+------+-----+------+
| Total SMDCF          | 9     | 4     | 142  | 80   | 40, | 120  |
|                      | 9,312 | 2,845 | ,157 | ,283 | 081 | ,364 |
+----------------------+-------+-------+------+------+-----+------+

(1) Represents PTTEP’s share of discounted future net cash flows of
    investment in Medco.

  As at 29^(th) January 2005 PTTEPO, a subsidiary of PTTEP, has signed a
  Conditional Share Purchase Agreement to sell its entire shareholdings
  in New Links Energy Resources Limited to Encore Int’l Limited
  (Encore). Encore, also a current shareholder, is choosing to exercise
  its pre-emptive right to purchase the aforementioned shares.

Changes in Standardized Measure of Discounted Future Net Cash Flows
Relating to Proved Oil and Gas Reserves

  ---------------------------------------------- ------------ ------------
  (Million Baht)                                 2004         2003

  Present value at beginning of year             116,326      96,059

  Sales and transfers of oil and gas produced,   (31,759)     (27,251)
  net of production costs                                     

  Development costs incurred during the period   6,782        4,916

  Net changes in prices and production costs     38,127       17,348

  Net changes in development costs               (15,079)     11,886

  Extensions, discoveries and improved recovery  272          19,732

  Revisions of previous quantity estimates       (5,923)      22,769

  Purchases / sales of petroleum in place        43,448       11,818

  Accretions of discount                         (5,337)      (20,450)

  Net changes in income taxes                    (10,287)     (20,500)

  Present value at the year end                  136,570      116,326
  ---------------------------------------------- ------------ ------------

19.6 Other information

  Productive Oil and Gas Wells

  The number of productive wells at December 31, 2004 were as follows :

+-----------------------------------+---------+------+-------+-------+
|                                   | Oil     |      | Gas   |       |
+-----------------------------------+---------+------+-------+-------+
|                                   | Gross   | Net  | Gross | Net   |
+-----------------------------------+---------+------+-------+-------+
| Thailand                          | 165     | 164  | 5     | 142   |
|                                   |         |      | 50⁽¹⁾ |       |
+-----------------------------------+---------+------+-------+-------+
| Foreign                           |         |      |       |       |
+-----------------------------------+---------+------+-------+-------+
| Southeast Asia                    | -       | -    | 20    | 5     |
+-----------------------------------+---------+------+-------+-------+
| Total                             | 165     | 164  | 570   | 147   |
+-----------------------------------+---------+------+-------+-------+

(1) The numbers of 77 production wells produce both crude oil and Gas.

  Drilling in Progress

  The number of oil and gas wells in progress at December 31, 2004 were
  as follows:

  Exploratory

+-----------------------------------+-------+-----------+------------+
|                                   |       | Gross     | Net        |
+-----------------------------------+-------+-----------+------------+
| Thailand                          |       | -         | -          |
+-----------------------------------+-------+-----------+------------+
| Foreign                           |       |           |            |
+-----------------------------------+-------+-----------+------------+
| Southeast Asia                    |       | -         | -          |
+-----------------------------------+-------+-----------+------------+
| Middle East                       |       | 1         | 1          |
+-----------------------------------+-------+-----------+------------+
| Total                             |       | 1         | 1          |
+-----------------------------------+-------+-----------+------------+

  Development

+-----------------------------------+-------+-----------+------------+
| Thailand                          |       | 2         | 0.9        |
+-----------------------------------+-------+-----------+------------+
| Foreign                           |       |           |            |
+-----------------------------------+-------+-----------+------------+
| Southeast Asia                    |       | -         | -          |
+-----------------------------------+-------+-----------+------------+
| Total                             |       | 2         | 0.9        |
+-----------------------------------+-------+-----------+------------+

  Net Oil and Gas Wells Drilled Annually in 2004

  Exploratory

+-----------------------------------+-------+-------------+-----------+
|                                   |       | Net         | Net dry   |
|                                   |       | Productive  |           |
|                                   |       | wells       | well      |
|                                   |       | drilled     | drilled   |
+-----------------------------------+-------+-------------+-----------+
| Thailand                          |       | 7.8         | -         |
+-----------------------------------+-------+-------------+-----------+
| Foreign                           |       |             |           |
+-----------------------------------+-------+-------------+-----------+
| Southeast Asia                    |       | 0.4         | 0.2       |
+-----------------------------------+-------+-------------+-----------+
| Total                             |       | 8.2         | 0.2       |
+-----------------------------------+-------+-------------+-----------+

  Development

+-----------------------------------+-------+-----------+------------+
| Thailand                          |       | 33.9      | -          |
+-----------------------------------+-------+-----------+------------+
| Foreign                           |       |           |            |
+-----------------------------------+-------+-----------+------------+
| Southeast Asia                    |       | 0.8       | -          |
+-----------------------------------+-------+-----------+------------+
| Total                             |       | 34.7      | -          |
+-----------------------------------+-------+-----------+------------+

  Gross wells include the total number of wells in which the company has
  an interest. Net wells are the sum of the company’s fractional
  interests in gross wells

  -----------------------------------------------------------------------
  20. Attachment 4: Quarterly Information in 2004 and 2003 (unaudited)
  for the consolidated financial statement are as follows:

  -----------------------------------------------------------------------

[TABLE]

  -----------------------------------------------------------------------
  21. Attachment 5: Audit Committee Report 2004

  -----------------------------------------------------------------------

The Board of Directors of PTT Exploration and Production Public Company
Limited (PTTEP) on June 29,2004 appointed new Audit Committee members in
replacement of recently retired Audit Committee members. The new Audit
Committee is composed of 3 Independent Directors with knowledge,
expertise and experience in finance and accounting, law, as well as
related technical practices, and is chaired by Mr. Nopadon Mantajit,
with Mr. Prasit Kovilaikool and Mr. Charnchai Musignisakorn
as members. No one on the Audit Committee is an executive, staff member
or advisor in PTTEP. The Audit Committee’s scope of work, duties and
responsibilities are in accordance with the Audit Committee Charter B.E.
2542.

In 2004, all Audit Committee members performed their duties and
responsibilities of Corporate Governance in accordance with PTTEP’s
Audit Committee Charter by attending 5 Audit Committee meetings. There
were a total of 37 agenda items which can be summarized as follows :

1)  Reviewed the PTTEP 2004 financial report for accuracy and adequacy,
    in which the External Auditor (The Office of the Auditor General or
    OAG) attended every quarter or 4 times. It was found that the
    company’s financial reports were accurate, reliable and thorough, in
    that they provided adequate disclosure of essential information.

2)  Reviewed PTTEP performance to ensure the Company’s compliance with
    the securities and stock exchange laws, the Stock Exchange of
    Thailand’s rules and regulations and other laws related to PTTEP’s
    business.

3)  Considered and /or supported the disclosure of any connected
    transactions to ensure accuracy and completeness together with the
    opinion that they were executed in the normal way of doing business.
    PTTEP also issued a quarterly Management Discussion and Analysis
    Report (MD&A), which is useful for all investors.

4)  Considered and approved the annual internal audit plan, reviewed the
    internal audit report and evaluated the internal control system with
    the conclusion that the company maintained an adequate internal
    controls system and improved control measurements related to all
    business environments.

5)  Considered, selected and proposed the Office of the Auditor General
    or OAG as PTTEP’s external auditor and also considered the relevant
    audit fees.

6)  Considered high risks facing PTTEP and proposed solutions to
    minimize those risks.

7)  Assessed the 2004 performance of the Manager, Internal Audit
    Department.

8)  Considered and screened the budget and the 2005 manpower for the
    Internal Audit Department.

9)  Confirmed that all Audit Committee members participated in and
    reported on the Audit Committee’s activities in 2003 during the
    Annual General Shareholders Meeting on April 28, 2004.

10) Reviewed and proposed that the Board of Directors revise the Audit
    Committee Charter B.E. 2542

11) Supported Good Corporate Governance implementation by participating
    in Corporate Governance Rating as conducted by TRIS Rating Co., Ltd.

12) Assessed the Audit Committee’s performance by completing a
    self–assessment and then solicited feedback from related parties to
    improve overall committee effectiveness. The Board of Directors have
    already acknowledged these assessment results.

The Audit Committee regularly submitted all Minutes of the meetings to
the Board of Directors.

In conclusion, the Audit Committee performed its assigned duties and
responsibilities related to Corporate Governance in 2004 with care,
knowledge and independence at its fullest ability, as well as providing
forthright opinions to all parties for the benefit of PTTEP,
shareholders and stakeholders in an appropriate manner.

Mr. Nopadon Mantajit

(Mr. Nopadon Mantajit)
Chairman of the Audit Committee

February,15 2005

 

  -----------------------------------------------------------------------
  22. Attachment 6: Table of Information of PTTEP and its Subsidiaries’
  Projects

  -----------------------------------------------------------------------

PTTEP Projects

+-----+-------------+-------------+---------------+-----------------+
|     | Product     |             |               |                 |
|     | ion Project |             |               |                 |
+-----+-------------+-------------+---------------+-----------------+
|     | S1 Project  | E5 Project  | Unocal III    | Bongkot Project |
|     |             |             | Project       | (Block          |
|     |             |             |               | B15,B16,B17)    |
+-----+-------------+-------------+---------------+-----------------+
| Lo  | Sukhothai,  | Khon Khaen  | Gulf of       | Gulf of         |
| cat | P           | Province,   | Thailand,     | Thailand,       |
| ion | hitsanulok, | Thailand    | Offshore      | approximately   |
|     | and         |             | Surat Thani   | 180 kms.        |
|     | K           |             | Province      | offshore        |
|     | amphaengpet |             |               | Songkhla        |
|     | Province,   |             |               | Province.       |
|     | Thailand    |             |               |                 |
+-----+-------------+-------------+---------------+-----------------+
| Pet | Sirikit     | Nam Phong   | Funan,        | Bongkot         |
| rol | Main,       |             | Jakrawan,     |                 |
| eum | Sirikit     |             | Gomin, Surat, |                 |
| Fi  | East,       |             | Plamuk, Trat, |                 |
| eld | Sirikit     |             | Pakarang,     |                 |
|     | West, Pru   |             | Yala          |                 |
|     | Kratiam,    |             |               |                 |
|     | Pratu Tao,  |             |               |                 |
|     | Thap Raet,  |             |               |                 |
|     | Wat Taen,   |             |               |                 |
|     | Nong Tum    |             |               |                 |
+-----+-------------+-------------+---------------+-----------------+
| P   | 1985        | 1990        | 1990          | 1988            |
| art |             |             |               |                 |
| ici |             |             |               |                 |
| pat |             |             |               |                 |
| ion |             |             |               |                 |
+-----+-------------+-------------+---------------+-----------------+
| P   | 1983        | 1990        | 1992          | 1993            |
| rod |             |             |               |                 |
| uct |             |             |               |                 |
| ion |             |             |               |                 |
| St  |             |             |               |                 |
| art |             |             |               |                 |
| up  |             |             |               |                 |
+-----+-------------+-------------+---------------+-----------------+
| C   |   No. Date  |   No. Date  |   No. Date    |   No. Date      |
| onc |   Condition |   Condition |   Condition   |   Condition     |
| ess |             |             |               |                 |
| ion |             |             |               |                 |
+-----+-------------+-------------+---------------+-----------------+
|     | 1/2522/16   | 2/2522/17 5 | 2/2515/6 26   | 5/2515/9 15     |
|     | 30 July     | July 2003   | September     | March 1990      |
|     | 1987        | Thailand I  | 1990 Thailand | Thailand I      |
|     | Thailand I  |             | I             |                 |
|     |             | (Su         |               | (Supplementary  |
|     | (Su         | pplementary | (             | No.10)          |
|     | pplementary | No.5)       | Supplementary |                 |
|     | No.2)       |             | No. 5)        |                 |
+-----+-------------+-------------+---------------+-----------------+
| Pa  |   Name      |   Name      |   Name        |   Name          |
| rtn |             |             |   Percentage  |   Percentage    |
| ers |  Percentage |  Percentage |               |                 |
|     |             |             | Unocal        | PTTEP. ^(/2)    |
|     |   PTTEP     |             | Thailand Ltd. | 44.4445         |
|     |   Siam      |  ExxonMobil | ^(/2) 71.25   |                 |
|     |   Limited   |             |               | TotalFinaElf    |
|     |   ^(/2)     | Exploration | Mitsui Oil    | Exploration &   |
|     |   75.00[1]  |   and       | Exploration   | Production      |
|     |             |             | 23.75         | 33.3333         |
|     |   PTTEP     |             |               |                 |
|     |   In        |  Production | PTTEP 5.00    |   Thailand      |
|     | ternational |   Khorat    |               |                 |
|     |   Limited   |   Inc.      |   Total       | Lippon Star     |
|     |   25.00     |             |   100.00      | Management      |
|     |             | (EMEPKI)[2] |               | 2.2222          |
|     |   Total     |   80.00     |               |                 |
|     |   100.00    |             |               | British Gas     |
|     |             |   PTTEP     |               | Thailand        |
|     |             |   20.00     |               | 20.0000         |
|     |             |             |               |                 |
|     |             |   Total     |               |   Total         |
|     |             |   100.00    |               |   100.0000      |
+-----+-------------+-------------+---------------+-----------------+
| T   |   Crude     | Natural Gas | Natural Gas   | Natural Gas and |
| ype |   Oil,      |             | and           | Condensate      |
| of  |   Natural   |             | Condensate    |                 |
| Pet |   Gas, LPG  |             |               |                 |
| rol |             |             |               |                 |
| eum |             |             |               |                 |
+-----+-------------+-------------+---------------+-----------------+

PTTEP Projects (cont’n)

+------------+-----------------+------------------+------------------+
|            | Production      | Exploration      |                  |
|            | Projects        | Projects         |                  |
+------------+-----------------+------------------+------------------+
|            | Pailin (B       | Arthis Projiect  | Phu Hom Project  |
|            | 12/27)          | (B 14A, B15A,    | (E5 North)       |
|            |                 | B16A)            |                  |
+------------+-----------------+------------------+------------------+
| Location   | In the Gulf of  | Gulf of Thailand | Udornthani       |
|            | Thailand        |                  | Province         |
|            | offshore of     |                  |                  |
|            | Nak             |                  |                  |
|            | ornsrithammaraj |                  |                  |
|            | Province,       |                  |                  |
|            | north-west of   |                  |                  |
|            | the Bongkot     |                  |                  |
|            | Project         |                  |                  |
+------------+-----------------+------------------+------------------+
| Petroleum  | Pailin, Nil,    | -                | Phu Hom          |
| Field      | Morakot,        |                  |                  |
|            | Peitay, Tubtim  |                  |                  |
+------------+-----------------+------------------+------------------+
| Par        | 1993            | -                | 1990             |
| ticipation |                 |                  |                  |
| Year       |                 |                  |                  |
+------------+-----------------+------------------+------------------+
| Production | Q 3 of Year     | 2007             | -                |
| Start up   | 1999            |                  |                  |
+------------+-----------------+------------------+------------------+
| Concession |   No. Date      |   No. Date       |   No. Date       |
|            |   Condition     |   Condition      |   Condition      |
+------------+-----------------+------------------+------------------+
|            | 1/2529/33 30    | 5/2515/9 1 June  | 1/2524/19 6      |
|            | April 1994      | 1999 Thailand I  | November 1997    |
|            | Thailand I      |                  | Thailand I       |
|            |                 | (Supplementary   |                  |
|            | (Supplementary  | No.12)           | (Supplementary   |
|            | No.5)           |                  | No.1)            |
+------------+-----------------+------------------+------------------+
| Partners   |   Name          |   Name           |   Name           |
|            |   Percentage    |   Percentage     |   Percentage     |
|            |                 |                  |                  |
|            |   PTTEP 45.00   |   PTTEP. ^(/2)   |   Amerada Hess   |
|            |                 |   80.00          |   International  |
|            |   Unocal        |                  |   Exploration    |
|            |   Thailand Ltd. |   Unocal         |   Company 35.00  |
|            |   [3]² 35.00    |   Thailand Ltd.  |                  |
|            |                 |   16.00          |   Apigo Limited  |
|            |   Amerada Hess  |                  |   35.00          |
|            |   International |   Moeco Thailand |                  |
|            |   Exploration   |   Company        |   EssoMobil      |
|            |   15.00         |   Limited 4.00   |   Exploration    |
|            |                 |                  |   and Production |
|            |   Moeco Thaioil |   Total 100.00   |   Khorat         |
|            |   Development   |                  |   Inc.Limited    |
|            |   5.00          |                  |   ^(/2) 10.00    |
|            |                 |                  |                  |
|            |   Total 100.00  |                  |   PTTEPI 20.00   |
|            |                 |                  |                  |
|            |                 |                  |   Total 100.00   |
+------------+-----------------+------------------+------------------+
| Type of    | Natural Gas and | Expected to be   | Condensate and   |
| Petroleum  | Condensate      | Natural Gas and  | Natural Gas      |
|            |                 | Crude Oil        |                  |
+------------+-----------------+------------------+------------------+

PTTEP Projects

+---------+-----------------+-------------------+---------------------+
|         | Production      |                   |                     |
|         | Project         |                   |                     |
+---------+-----------------+-------------------+---------------------+
|         | PTTEP 1 Project | Yadana Project    | Yetagun Project     |
|         |                 | (Block M5 M6)     |                     |
+---------+-----------------+-------------------+---------------------+
| L       | City District   | Gulf of Martabun, | Gulf of Martabun,   |
| ocation | Kamphaengsang   | Myanmar           | Myanmar             |
|         | Narkorn Prothom |                   |                     |
|         | Province and    |                   |                     |
|         | City District   |                   |                     |
|         | of Suphanburi   |                   |                     |
|         | Province        |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Pe      | Kamphaengsang,  | Yadana, Badamyar, | Yetagun             |
| troleum | U-Thong and     | Sein              |                     |
| Field   | Sangrajai       |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Partic  | 1993            | 1995              | 1997                |
| ipation |                 |                   |                     |
| Year    |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Pro     | 1991            | 1998              | 2000                |
| duction |                 |                   |                     |
| Year    |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Con     |   No. Date      |   No. Date        |   No. Date          |
| cession |   Condition     |   Condition       |   Condition         |
+---------+-----------------+-------------------+---------------------+
|         | 2/2528/27 10    |   - - -           |   - - -             |
|         | May 1995        |                   |                     |
|         | Thailand III    |                   |                     |
|         |                 |                   |                     |
|         | (Supplementary  |                   |                     |
|         | No.4)           |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Pro     |                 |                   |                     |
| duction |                 |                   |                     |
| Sharing |                 |                   |                     |
| Ag      |                 |                   |                     |
| reement |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
|   :     | -               | July 9, 1992      | September 29,1992   |
|   Date  |                 |                   | (Block M12)         |
|   of    |                 |                   |                     |
|   Ag    |                 |                   | May 3, 1990 (Block  |
| reement |                 |                   | M 13 และBlock M14)  |
+---------+-----------------+-------------------+---------------------+
|   :     | -               | 20 years or       | -                   |
|         |                 | expiration of gas |                     |
|  Period |                 | Sales/Purchase    |                     |
|   of    |                 | Agreement or 30   |                     |
|   Ag    |                 | years from 1      |                     |
| reement |                 | August 1998       |                     |
+---------+-----------------+-------------------+---------------------+
|   :     | -               | -                 | 3 years from date   |
|         |                 |                   | of Sales/Purchase   |
|  Period |                 |                   | Agreement with      |
|   of    |                 |                   | allowance of 2      |
|   Expl  |                 |                   | extension periods   |
| oration |                 |                   | of one year each.   |
+---------+-----------------+-------------------+---------------------+
|   :     | -               | -                 | 30 years as         |
|         |                 |                   | according to the    |
|  Period |                 |                   | Sales/Purchase      |
|   of    |                 |                   | Agreement           |
|   Pro   |                 |                   |                     |
| duction |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| P       |   Name          |   Name Percentage |   Name Percentage   |
| artners |   Percentage    |                   |                     |
|         |                 |   Total           | Petronas Carigali   |
|         |   PTTEPI[4]²    |   Exploration and | Myanmar Inc.        |
|         |   100.00        |   Production      | 30.00140            |
|         |                 |   Myanmar ^(/2)   |                     |
|         |                 |   31.24           |   Petronas Carigali |
|         |                 |                   |   Myanmar (Hong     |
|         |                 |   Unocal Myanmar  |   Kong) Ltd.^(/2)   |
|         |                 |   Offshore Co.,   |   10.90878          |
|         |                 |   Ltd. 28.26      |                     |
|         |                 |                   |   MOGE 20.45410     |
|         |                 |   PTTEPI 25.50    |                     |
|         |                 |                   |   Nippon Oil        |
|         |                 |   MOGE 15.00      |   Exploration       |
|         |                 |                   |   (Myanmar) Ltd.    |
|         |                 |   Total 100.00    |   19.31780          |
|         |                 |                   |                     |
|         |                 |                   |   PTTEPI 19.31780   |
|         |                 |                   |                     |
|         |                 |                   |   Total 100.0000    |
+---------+-----------------+-------------------+---------------------+
| Pro     | Crude Oil       | Natural Gas       | Natural Gas and     |
| duction |                 |                   | Condensate          |
+---------+-----------------+-------------------+---------------------+

PTTEPI Projects

+---------+-----------------+-------------------+---------------------+
|         | Exploration     |                   |                     |
|         | Projects        |                   |                     |
+---------+-----------------+-------------------+---------------------+
|         | Project L22/43  | Project G 4/43    | Project G9/43       |
+---------+-----------------+-------------------+---------------------+
| L       | Pisanuluk       | Gulf of Thailand, | Gulf of Thailand,   |
| ocation | Province and    | offshore of       | Overlapping Area    |
|         | Pichit Province | Prachaubkirikan   | between Thailand    |
|         |                 | Province          | and Cambodia        |
+---------+-----------------+-------------------+---------------------+
| Pe      |                 | -                 | -                   |
| troleum |                 |                   |                     |
| Field   |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Partic  | 2003            | -                 | -                   |
| ipation |                 |                   |                     |
| Year    |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Pro     |                 | -                 | -                   |
| duction |                 |                   |                     |
| Year    |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Con     |   No. Date      |   No. Date        |   No. Date          |
| cession |   Condition     |   Condition       |   Condition         |
+---------+-----------------+-------------------+---------------------+
|         | 2/2546/59 20    | 4/2546/61 6       | 8/2546/65 17 July   |
|         | August 2004     | October 2004      | 2003                |
|         | Thailand III    | Thailand III      |                     |
|         |                 |                   | (Supplementary      |
|         | (Supplementary  | (Supplementary    | No.1)               |
|         | No.1)           | No.1)             |                     |
+---------+-----------------+-------------------+---------------------+
|   :     | - 2 Phases 3    | - 2 Phases 3      | - On negotiation    |
|   Expl  | years/phase     | years/phase       | process as it is an |
| oration |                 |                   | overlapping area    |
|         |                 |                   | between Thailand    |
|  Period |                 |                   | and Cambodia        |
+---------+-----------------+-------------------+---------------------+
|   :     | - 20 Years      | - 20 Years after  | -                   |
|   Pro   | after the final | the final date of |                     |
| duction | date of the     | the petroleum     |                     |
|         | petroleum       | exploration       |                     |
|  Period | exploration     | phase.            |                     |
|         | phase.          |                   |                     |
+---------+-----------------+-------------------+---------------------+
| P       |   Name          |   Name Percentage |   Name Percentage   |
| artners |   Percentage    |                   |                     |
|         |                 |   Chevron         |   PTTEPI[5]².       |
|         | PTTEPI 100.00   |   Offshore        |   100.00            |
|         | ^(/1)           |   (Thailand)      |                     |
|         |                 |   Limited ^(/2)   |   Total 100.00      |
|         |   Total 100.00  |   85.00           |                     |
|         |                 |                   |                     |
|         |                 |   PTTEPI 15.00    |                     |
|         |                 |                   |                     |
|         |                 |   Total 100.00    |                     |
+---------+-----------------+-------------------+---------------------+
| P       | Crude Oil       | Crude Oil,        | -                   |
| roducts |                 | Natural Gas and   |                     |
|         |                 | Condensate        |                     |
+---------+-----------------+-------------------+---------------------+

PTTEPI Projects

+---------+-----------------+-------------------+---------------------+
|         | Exploration     |                   |                     |
|         | Projects        |                   |                     |
+---------+-----------------+-------------------+---------------------+
|         | Myanmar M7& M9  | Myanmar M3&M4     | Bongkot Project     |
|         | Project         | Project           | (Block B 13/38)     |
+---------+-----------------+-------------------+---------------------+
| L       | Gulf of Mataban | Gulf of Mataban   | South of Bongkot    |
| ocation | near the Yadana | near the Yadana   |                     |
|         | Field           | Field             |                     |
+---------+-----------------+-------------------+---------------------+
| Pe      | -               |                   | Bongkot             |
| troleum |                 |                   |                     |
| Field   |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Partic  | -               |                   | -                   |
| ipation |                 |                   |                     |
| Year    |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Pro     | -               |                   | 2007                |
| duction |                 |                   |                     |
| Year    |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
| Con     |   No. Date      |   No. Date        |   No. Date          |
| cession |   Condition     |   Condition       |   Condition         |
+---------+-----------------+-------------------+---------------------+
|         |   - - -         |   - - -           | 2/2539/49 27 June   |
|         |                 |                   | 1996 Thailand III   |
|         |                 |                   |                     |
|         |                 |                   | (Supplementary      |
|         |                 |                   | No.3)               |
+---------+-----------------+-------------------+---------------------+
| Pro     |                 |                   |                     |
| duction |                 |                   |                     |
| Sharing |                 |                   |                     |
| Ag      |                 |                   |                     |
| reement |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
|   :     | - 12 November   | - 7 August 2004   | -                   |
|   Date  | 2003            |                   |                     |
|   of    |                 |                   |                     |
|   Ag    |                 |                   |                     |
| reement |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
|   :     | - Data Study    | - Data Study      | -                   |
|         | Period of 1     | Period of 1 year  |                     |
|  Period | year            |                   |                     |
|   of    |                 |                   |                     |
|   Ag    |                 |                   |                     |
| reement |                 |                   |                     |
+---------+-----------------+-------------------+---------------------+
|   :     | - 3 years after | - 3 years after   |                     |
|         | the Data Study  | the Data Study    |                     |
|  Period | Period with     | Period with       |                     |
|   of    | allowance of 2  | allowance of 2    |                     |
|   Expl  | extension       | extension periods |                     |
| oration | periods of one  | of one year each. |                     |
|         | year each.      |                   |                     |
+---------+-----------------+-------------------+---------------------+
|   :     | - 20 years      | - 20 years after  |                     |
|         | after the final | the final day of  |                     |
|  Period | day of the      | the development   |                     |
|   of    | development or  | or production or  |                     |
|   Pro   | production or   | according to the  |                     |
| duction | according to    | petroleum         |                     |
|         | the petroleum   | sales/purchase    |                     |
|         | sales/purchase  | agreement.        |                     |
|         | agreement.      |                   |                     |
+---------+-----------------+-------------------+---------------------+
| P       |   Name          |   Name Percentage |   ชื่อ ร้อยละ          |
| artners |   Percentage    |                   |                     |
|         |                 |   PTTEPI^(/2)     |   PTTEPI [6]²       |
|         |   PTTEPI^(/2)   |   100.00          |   44.4445           |
|         |   100.00        |                   |                     |
|         |                 |   Total 100.00    |   TotalFinaElf      |
|         |   Total 100.00  |                   |   Exploration and   |
|         |                 |                   |                     |
|         |                 |                   |   Production        |
|         |                 |                   |   Thailand 33.3333  |
|         |                 |                   |                     |
|         |                 |                   |   Thai Energy       |
|         |                 |                   |   Limited 22.2222   |
|         |                 |                   |                     |
|         |                 |                   | รวม 100.0000        |
+---------+-----------------+-------------------+---------------------+
| P       |                 |                   | Natural Gas and     |
| roducts |                 |                   | Condensate          |
+---------+-----------------+-------------------+---------------------+

PTTEPI & PTTEPO Projects

+----------+--------------------+-------------------+----------------+
|          | Exploration        | Exploration       |                |
|          | Project            | Projects with     |                |
|          |                    | Join-Invested     |                |
|          |                    | Agreement         |                |
+----------+--------------------+-------------------+----------------+
|          | PTTEPI             | PTTEPO            |                |
+----------+--------------------+-------------------+----------------+
|          | L53/43 & L54/43    | Vietnam B& 48/95  | Oman 44        |
|          |                    |                   | Project        |
+----------+--------------------+-------------------+----------------+
| Location | Ayuthaya Augthong  | In the Gulf of    | Oman onshore   |
|          | Suphanburi &       | Thailand, to the  | approximately  |
|          | Kanchanaburi       | west of Vietnam   | 300 k.m. west  |
|          |                    |                   | of Mascat      |
+----------+--------------------+-------------------+----------------+
| P        | Nongphangshe Pai   | Kim Long Argul    |                |
| etroleum | Kwang              |                   |                |
| Field    |                    |                   |                |
+----------+--------------------+-------------------+----------------+
| Parti    | 2004               | 2000              | 2002           |
| cipation |                    |                   |                |
| Year     |                    |                   |                |
+----------+--------------------+-------------------+----------------+
| Pr       | 2006               |                   | 2005           |
| oduction |                    |                   |                |
| Year     |                    |                   |                |
+----------+--------------------+-------------------+----------------+
| Co       |   No. Date         |   No. Date        |   No. Date     |
| ncession |   Condition        |   Condition       |   Condition    |
+----------+--------------------+-------------------+----------------+
|          | 2/2547/68 22       |   - - -           |   - 27 August  |
|          | January 2004       |                   |   2002 -       |
+----------+--------------------+-------------------+----------------+
| Pr       |                    |                   |                |
| oduction |                    |                   |                |
| Sharing  |                    |                   |                |
| A        |                    |                   |                |
| greement |                    |                   |                |
+----------+--------------------+-------------------+----------------+
|   : Date | -                  | 8 August 2000     | 21 July 2002   |
|   of     |                    |                   |                |
|   A      |                    |                   |                |
| greement |                    |                   |                |
+----------+--------------------+-------------------+----------------+
|   :      | -                  | -                 | -              |
|   Period |                    |                   |                |
|   of     |                    |                   |                |
|   A      |                    |                   |                |
| greement |                    |                   |                |
+----------+--------------------+-------------------+----------------+
| : Period | 6 years            | -                 | -              |
| of       |                    |                   |                |
| Exp      |                    |                   |                |
| loration |                    |                   |                |
+----------+--------------------+-------------------+----------------+
| Partners |   ชื่อ ร้อยละ         |   ชื่อ ร้อยละ        |   ชื่อ ร้อยละ     |
|          |                    |                   |                |
|          | PTTEP (Th          | Unocal Vietnam    | PTTEP Mid      |
|          | ailand) Company Li | Exploration       | dle East Limit |
|          | mited ^(/2) 100.00 | Limited ^(/2)     | ed [7]² 100.00 |
|          |                    | 42.38             |                |
|          |                    |                   |                |
|          |                    | Moeco Vietnam     |                |
|          |                    | Petroleum Limited |                |
|          |                    | 25.62             |                |
|          |                    |                   |                |
|          |                    | Petroleum Vietnam |                |
|          |                    | Exploration 23.50 |                |
|          |                    |                   |                |
|          |                    | and Production    |                |
|          |                    | Limited           |                |
|          |                    |                   |                |
|          |                    | PTTEP Kim Long    |                |
|          |                    | Vietnam Limited   |                |
|          |                    | 8.50              |                |
|          |                    |                   |                |
|          |                    | Total 100.00      |                |
+----------+--------------------+-------------------+----------------+
| Products |                    | Natural Gas       | Crude Oil ,    |
|          |                    |                   | Natural Gas    |
|          |                    |                   | and Condensate |
+----------+--------------------+-------------------+----------------+

PTTEPO Projects

+-----------+----------------+----------------+-----------------------+
|           | Production     |                | Exploration Project   |
|           | Projects       |                | with joint investment |
|           |                |                | agreement             |
+-----------+----------------+----------------+-----------------------+
|           | MTJDA Project  |                |                       |
+-----------+----------------+----------------+-----------------------+
|           | Block B 17 และ | Block B17-01   | Algeria 433a & 416b   |
|           | C 19           |                |                       |
+-----------+----------------+----------------+-----------------------+
| Location  | South of the   | South of the   | South-east of Algeria |
|           | Gulf of        | Gulf of        |                       |
|           | Thailand       | Thailand       |                       |
+-----------+----------------+----------------+-----------------------+
| Petroleum | South Muda     |                | Bir Seba and Bir El   |
| Field     | Tapee Jengka   |                | Atrech                |
|           | Amrit Mari     |                |                       |
|           | West Jengka    |                |                       |
|           | East Jengka    |                |                       |
|           | South Jengka   |                |                       |
+-----------+----------------+----------------+-----------------------+
| Part      | 1994           | 2004           | 2004                  |
| icipation |                |                |                       |
| Year      |                |                |                       |
+-----------+----------------+----------------+-----------------------+
| P         | -              |                |                       |
| roduction |                |                |                       |
| Year      |                |                |                       |
+-----------+----------------+----------------+-----------------------+
| C         |   No. Date     |   No. Date     |   No. Date Condition  |
| oncession |   Condition    |   Condition    |                       |
+-----------+----------------+----------------+-----------------------+
|           |   - - -        |   - - -        |   - - -               |
+-----------+----------------+----------------+-----------------------+
| P         |                |                |                       |
| roduction |                |                |                       |
| Sharing   |                |                |                       |
| Agreement |                |                |                       |
+-----------+----------------+----------------+-----------------------+
|   : Date  | 21 April 1999  | 30 September   | 10 July 2002          |
|   of      | (Supplementary | 2004           |                       |
|           | No.1)          |                |                       |
| Agreement |                |                |                       |
+-----------+----------------+----------------+-----------------------+
|   :       | 35 years from  |                |                       |
|   Period  | the date of    |                |                       |
|   of      | Agreement      |                |                       |
|           |                |                |                       |
| Agreement |                |                |                       |
+-----------+----------------+----------------+-----------------------+
| Partners  |   ชื่อ ร้อยละ     |   ชื่อ ร้อยละ     | ชื่อ ร้อยละ              |
|           |                |                |                       |
|           |   PTTEPI 50.00 |   PTTEPI 50.00 | Petroleum Investment  |
|           |                |                | and Development       |
|           |   Petronas     |   Petronas     | Company Limited[8]²   |
|           |   Carligali    |   Carligali    | 40.00                 |
|           |   (JDA) 50.00  |   (JDA) 50.00  |                       |
|           |                |                | PTTEP Algeria Company |
|           |   Total 100.00 |   Total 100.00 | Limited 35.00         |
|           |                |                |                       |
|           | Remark:        | Remark:        | SONATRACH 25.00       |
|           | Carligari      | Carligari      |                       |
|           | PTTEP          | PTTEP          |   Total 100.00        |
|           | International  | International  |                       |
|           | Operating      | Operating      |                       |
|           | Company was    | Company was    |                       |
|           | established to | established to |                       |
|           | be the         | be the         |                       |
|           | joint-operator | joint-operator |                       |
|           | of JDA Project | of JDA Project |                       |
|           | with PTTEP and | with PTTEP and |                       |
|           | Petronas       | Petronas       |                       |
|           | Carligali      | Carligali      |                       |
|           | invested by    | invested by    |                       |
|           | 50:50.         | 50:50.         |                       |
+-----------+----------------+----------------+-----------------------+
| Products  | Natural Gas    | Natural Gas    | Crude Oil             |
|           | and Condensate | and Condensate |                       |
+-----------+----------------+----------------+-----------------------+

PTTEPO Projects

+---------+----------------+----------------+-------------------------+
|         | Exploration    |                |                         |
|         | Project with   |                |                         |
|         | Joint-Invested |                |                         |
|         | Agreement      |                |                         |
|         | (cont’n)       |                |                         |
+---------+----------------+----------------+-------------------------+
|         | Vietnam 52/97  | Vietnam Block  | Vietnam 16/1 Project    |
|         | Project        | 9/2 Project    |                         |
+---------+----------------+----------------+-------------------------+
| L       | In the Gulf of | Offshore to    | Offshore to the South   |
| ocation | Thailand, to   | the South East | East of Vang Tau of     |
|         | the west of    | of Vang Tau of | Vietnam                 |
|         | Vietnam        | Vietnam        |                         |
+---------+----------------+----------------+-------------------------+
| Pe      | Carvoy Arguy   | -              | -                       |
| troleum |                |                |                         |
| Field   |                |                |                         |
+---------+----------------+----------------+-------------------------+
| Partic  | 2000           | 2002           | 2002                    |
| ipation |                |                |                         |
| Year    |                |                |                         |
+---------+----------------+----------------+-------------------------+
| Pro     | -              | -              | -                       |
| duction |                |                |                         |
| Year    |                |                |                         |
+---------+----------------+----------------+-------------------------+
| Con     |   No. Date     |   No. Date     |   No. Date Condition    |
| cession |   Condition    |   Condition    |                         |
+---------+----------------+----------------+-------------------------+
|         |   - - -        |   - - -        |   - - -                 |
+---------+----------------+----------------+-------------------------+
| Pro     |                |                |                         |
| duction |                |                |                         |
| Sharing |                |                |                         |
| Ag      |                |                |                         |
| reement |                |                |                         |
+---------+----------------+----------------+-------------------------+
|   :     | 19 October     | 21 December    | 8 December 1999         |
|   Date  | 1999           | 2000           |                         |
|   of    |                |                |                         |
|   Ag    |                |                |                         |
| reement |                |                |                         |
+---------+----------------+----------------+-------------------------+
|   :     |                |                |                         |
|         |                |                |                         |
|  Period |                |                |                         |
|   of    |                |                |                         |
|   Ag    |                |                |                         |
| reement |                |                |                         |
+---------+----------------+----------------+-------------------------+
| P       |   Name         |   Name         |   Name Percentage       |
| artners |   Percentage   |   Percentage   |                         |
|         |                |                | Petroleum Vietnam       |
|         | Unocal         | Soco Vietnam   | Exploration and         |
|         | Southwest      | Limited 25.00  |                         |
|         | Vietnam [9]²   |                | Production Limited      |
|         |                | Petroleum      | 41.00                   |
|         | Exploration    | Vietnam        |                         |
|         | and Production | Exploration    | PTTEP Hong Long Vietnam |
|         | Limited 43.40  | and            | Limited 28.50           |
|         | Moeco          |                |                         |
|         | Southwest      | Production     | Soco Vietnam Limited    |
|         | Vietnam        | Limited 50.00  | 28.50                   |
|         | Petroleum Ltd. |                |                         |
|         | 19.60          | PTTEP Hong Vu  | OPECO Vietnam 2.00      |
|         |                | 25.00          |                         |
|         | Petroleum      |                |   Total 100.00          |
|         | Vietnam        |   Total 100.00 |                         |
|         | Exploration    |                | Remark: Hong Long       |
|         | and            | Remark: Hong   | Operating Limited was   |
|         |                | Vu Operating   | established to be the   |
|         | Production     | Limited was    | joint- operator of      |
|         | Limited 30.00  | established to | Project Block 16/1.     |
|         |                | be the joint-  |                         |
|         | PTTEP          | operator of    |                         |
|         | Southwest      | Project Block  |                         |
|         | Vietnam        | 9/2            |                         |
|         | Limited 7.00   |                |                         |
|         |                |                |                         |
|         |   Total 100.00 |                |                         |
+---------+----------------+----------------+-------------------------+
| P       | Natural Gas    | Expected to be | Expected to be Crude    |
| roducts |                | Crude Oil      | Oil                     |
+---------+----------------+----------------+-------------------------+

PTTEPS Projects

+--------------+---------------------------+--------------------------+
|              | Exploration Project with  | Production Project       |
|              | joint agreement           |                          |
+--------------+---------------------------+--------------------------+
|              | Ph                        | Nang N                   |
|              | u Hom Project (Block EU1) | uan Project (Block 6/27) |
+--------------+---------------------------+--------------------------+
| Location     | Udonthani                 | Gulf of Thailand, 25     |
|              |                           | kilometers East of Savee |
|              |                           | Sub-District Chumporn    |
|              |                           | Province                 |
+--------------+---------------------------+--------------------------+
| Petroleum    | Phu Hom                   |                          |
| Field        |                           |                          |
+--------------+---------------------------+--------------------------+
| P            | 2004                      | 2005                     |
| articipation |                           |                          |
| Year         |                           |                          |
+--------------+---------------------------+--------------------------+
| Production   | Mid of year 2006          |                          |
| Year         |                           |                          |
+--------------+---------------------------+--------------------------+
| Concession   |   No. Date Condition      |   No. Date Condition     |
+--------------+---------------------------+--------------------------+
|              | 1/2524/19 24 June 2004    | 3/2528/28 6 February     |
|              | Thailand I                | 1979 Thailand I          |
+--------------+---------------------------+--------------------------+
|              | (Supplementary No.3)      |                          |
+--------------+---------------------------+--------------------------+
| Production   |                           |                          |
| Sharing      |                           |                          |
| Agreement    |                           |                          |
+--------------+---------------------------+--------------------------+
|   : Date of  | 31 January 2004           |                          |
|   Agreement  |                           |                          |
+--------------+---------------------------+--------------------------+
|   : Period   | 30 Year                   |                          |
|   of         |                           |                          |
|   Agreement  |                           |                          |
+--------------+---------------------------+--------------------------+
| Partners     |   Name Percentage         |   Name Percentage        |
|              |                           |                          |
|              |   Amerada Hess            |   PTTEPS[10]² 100..00    |
|              |   International           |                          |
|              |   Exploration Company     | Total 100.00             |
|              |   35.00                   |                          |
|              |                           |                          |
|              |   Apigo Limited 35.00     |                          |
|              |                           |                          |
|              |   EssoMobil Exploration   |                          |
|              |   and Production          |                          |
|              |   Khorat Inc.Limited      |                          |
|              |   ^(/2) 10.00             |                          |
|              |                           |                          |
|              |   PTTEPS 20.00            |                          |
|              |                           |                          |
|              |   Total 100.00            |                          |
+--------------+---------------------------+--------------------------+
| Products     | Condensate and Natural    | Crude Oil                |
|              | Gas                       |                          |
+--------------+---------------------------+--------------------------+

[1] PTTEP signed the Share Purchasing Agreement with Thai Shell
Exploration and Production Company Limited by buying all the shares on
December 30, 2003 which affected PTTEP to own the total shares from
Jan.1, 2004 onwards.

[2] The Operator of the Project

[3] ^(/ 2) The Operator of the Project

[4] ^(/2)The operator of the Projects

[5] ^(/1) PTTEP signed the Shares Purchase Agreement with Thai Shell
Exploration and Production Company Limited to purchase all shares on
December 2003 , which resulted PTTEPI to increase an extra of 65%
shares, therefore hold a total of 100 % shares on January 1,2004 onwards
and the ownership will be fully effective when the Government give
approval.

^(/2) The operator of the Project

[6] ^(/2) The operator of the Project

[7] ^(/2) The operator of the Project

[8] ^(/2) The operator of the Project

[9] ^(/2) The operator of the Project

[10] ^(/2) The operator of the Project