Occidental Petroleum Corporation (OXY, NYSE)
Industry: Oil & Gas E&P
Annual report, fiscal year 2012


## INVESTING
IN GROWTH

2012 ANNUAL REPORT



<table><tr><td colspan="6">Dollar amounts in millions, except per-share amounts</td></tr><tr><td>As of and for the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>RESULTS OF OPERATIONS(a)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net sales</td><td>$ 24,172</td><td>$ 23,939</td><td>$ 19,045</td><td>$ 14,814</td><td>$ 23,713</td></tr><tr><td>Income from continuing operations(b)</td><td>$ 4,635</td><td>$ 6,640</td><td>$ 4,569</td><td>$ 3,151</td><td>$ 7,183</td></tr><tr><td>Net income attributable to common stock</td><td>$ 4,598</td><td>$ 6,771</td><td>$ 4,530</td><td>$ 2,915</td><td>$ 6,857</td></tr><tr><td>Basic earnings per common share from continuing operations(b)</td><td>$ 5.72</td><td>$ 8.16</td><td>$ 5.62</td><td>$ 3.88</td><td>$ 8.77</td></tr><tr><td>Basic earnings per common share(b)</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.57</td><td>$ 3.59</td><td>$ 8.37</td></tr><tr><td>Diluted earnings per common share(b)</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.56</td><td>$ 3.58</td><td>$ 8.34</td></tr><tr><td>FINANCIAL POSITION(a)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total assets</td><td>$ 64,210</td><td>$ 60,044</td><td>$ 52,432</td><td>$ 44,229</td><td>$ 41,537</td></tr><tr><td>Long-term debt, net</td><td>$ 7,023</td><td>$ 5,871</td><td>$ 5,111</td><td>$ 2,557</td><td>$ 2,049</td></tr><tr><td>Stockholders&#x27; equity</td><td>$ 40,048</td><td>$ 37,620</td><td>$ 32,484</td><td>$ 29,159</td><td>$ 27,325</td></tr><tr><td>MARKET CAPITALIZATION(c)</td><td>$ 61,710</td><td>$ 75,992</td><td>$ 79,735</td><td>$ 66,050</td><td>$ 48,607</td></tr><tr><td>CASH FLOW</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Operating:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash provided by operating activities</td><td>$ 11,312</td><td>$ 12,281</td><td>$ 9,566</td><td>$ 5,946</td><td>$ 10,765</td></tr><tr><td>Investing:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Capital expenditures</td><td>$ (10,226)</td><td>$ (7,518)</td><td>$ (3,940)</td><td>$ (3,245)</td><td>$ (4,126)</td></tr><tr><td>Cash used by all other investing activities, net</td><td>$ (2,429)</td><td>$ (2,385)(d)</td><td>$ (5,355)</td><td>$ (2,221)</td><td>$ (5,314)</td></tr><tr><td>Financing:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash dividends paid</td><td>$ (2,128)(e)</td><td>$ (1,436)</td><td>$ (1,159)</td><td>$ (1,063)</td><td>$ (940)</td></tr><tr><td>Cash provided (used) by all other financing activities, net</td><td>$ 1,282</td><td>$ 261</td><td>$ 2,242</td><td>$ 30</td><td>$ (570)</td></tr><tr><td>DIVIDENDS PER COMMON SHARE</td><td>$ 2.16</td><td>$ 1.84</td><td>$ 1.47</td><td>$ 1.31</td><td>$ 1.21</td></tr><tr><td>WEIGHTED AVERAGE BASIC SHARES OUTSTANDING (THOUSANDS)</td><td>809,345</td><td>812,075</td><td>812,472</td><td>811,305</td><td>817,635</td></tr></table>

Note: Argentine operations were sold in February 2011 and have been reflected as discontinued operations for all periods.

(a) See the MD&A section of this report and the Notes to Consolidated Financial Statements for information regarding acquisitions and dispositions, discontinued operations and other items affecting comparability.

(b) Represent amounts attributable to common stock after deducting noncontrolling interest amounts of $72 million in 2010, $51 million in 2009 and $116 million in 2008. There were no noncontrolling interests in 2012 and 2011.

(c) Market capitalization is calculated by multiplying the year-end total shares of common stock outstanding, net of shares held as treasury stock, by the year-end closing stock price.

(d) Includes $2.6 billion of cash received from the sale of the Argentine operations.

(e) Includes the accelerated fourth quarter 2012 dividend payment, which normally would have been accrued as of year end but paid in the first quarter of the following year.

Portions of this report contain forward-looking statements and involve risks and uncertainties that could materially affect expected results of operations, liquidity, cash flows and business prospects. Words such as “estimate,” “project,” “predict,” “will,” “would,” “should,” “could,” “may,” “might,” “anticipate,” “plan,” “intend,” “believe,” “expect,” “aim,” “goal,” “target,” “objective,” “likely” or similar expressions that convey the prospective nature of events or outcomes generally indicate forward-looking statements. You should not place undue reliance on these forward-looking statements, which speak only as of the date of this report. Unless legally required, Occidental does not undertake any obligation to update any forward-looking statements as a result of new information, future events or otherwise. Factors that may cause Occidental’s results of operations and financial position to differ from expectations include but are not limited to: global commodity pricing fluctuations; supply and demand considerations for Occidental’s products; general domestic political and regulatory approval conditions; higher-than-expected costs; international political conditions; not successfully completing, or any material delay of, any development of new fields, expansion projects, capital expenditures, efficiency-improvement projects, acquisitions or dispositions; potential failure to achieve expected production from existing and future oil and gas development projects or acquisitions; exploration risks such as drilling unsuccessful wells; any changes in general economic conditions domestically or internationally; the ability to attract trained engineers; potential liability for remedial actions under existing or future environmental regulations and litigation; potential liability resulting from pending or future litigation; potential disruption or interruption of Occidental’s production or manufacturing or damage to facilities due to accidents, chemical releases, labor unrest, weather, natural disasters, political events or insurgent activity; failure of risk management; changes in law or regulations; or changes in tax rates. We use certain terms in this report, such as expected ultimate recovery, likely developable resources, total oil in place, oil held in acreage, total resource base and recoverable resources, that the SEC’s guidelines strictly prohibit us from using in our SEC filings. These terms represent our internal estimates of volumes of oil and gas that are not proved reserves but are potentially recoverable through exploratory drilling or additional drilling or recovery techniques and are not intended to correspond to probable or possible reserves as defined by SEC regulations. By their nature these estimates are more speculative than proved, probable or possible reserves and subject to greater risk they will not be realized. Throughout the executive letters in this report, “barrels” may refer to barrels of oil, barrels of liquid or barrels of oil equivalent, which includes natural gas.

## ON THE COVER

Oxy’s CO \( _{2} \)  operations, Hobbs, New Mexico, in the Permian Basin



## TARGETED
INVESTMENT

Our business strategy is designed to maintain our emphasis on oil production growth in a highly focused manner.

UNITED STATES

61%
of worldwide production
465,000 BOEPD of production
2.3 billion BOE proved reserves

INTERNATIONAL

39%
of worldwide production
301,000 BOEPD of production
1.0 billion BOE proved reserves

Occidental Petroleum Corporation (NYSE: OXY) is a leading international oil and gas exploration and production company, and its OxyChem subsidiary is a major North American chemical manufacturer.

One of the largest U.S. oil and gas companies, based on equity market capitalization, Oxy is an industry leader in applying technology to boost production from mature fields and access hard-to-recover reserves. With more than 40,000 employees and contractors, Oxy is committed to respecting the environment, protecting safety and upholding high standards of social responsibility throughout its worldwide operations.



Our top priority is to create value for our stockholders by focusing on total shareholder return.



# STRATEGY
FOR SUCCESS

Our long-term strategy has enabled us to establish Oxy as a strong performer in our industry – globally respected, financially sound, with an enviable balance sheet and great promise for generating future value for our stockholders.
Our top priority is to create value for our stockholders by focusing on total shareholder return. Achievement of this goal demands that we bring sound judgment and stewardship to our operations and assets. Near term, we must focus on achieving healthy annual returns. In planning longer term, we must identify, and invest in, assets and projects that will create growth.

In 2012, we experienced disappointing stock performance, resulting from several factors. Rising costs, primarily in our oil and gas operations, contributed to lower margins. In this regard, we fell short of expectations in 2012. To remedy this, we are taking aggressive steps to improve operational efficiencies without impacting overall production growth or compromising our standards regarding health, safety and the environment. These actions are designed to improve profitability and total shareholder return in 2013 and beyond.

Reflecting their confidence in this strategy, the Board of Directors in February 2013 approved a dividend increase of 18.5 percent, to $2.56 per share. It was the twelfth dividend increase in 11 years.

Throughout 2012, we invested in assets and projects that we believe will strengthen our company’s performance for years to come.

In the United States, we continue to invest in oil and gas properties with a focus on growing our oil production. We acquired properties in some of the most prolific oil basins in the continental United States — in the Permian Basin in West Texas and New Mexico; in California; and in the Williston Basin in North Dakota. In addition, we are increasing our gas processing and oil pipeline transportation capacity in key producing areas of West Texas, and building a membrane cell chlor-alkali plant in Tennessee.

In the Middle East, we are investing significant capital along with the Abu Dhabi National Oil Company (ADNOC) in the Al Hosn Gas Project, which is expected to become a strong contributor to Oxy’s cash flow once it becomes operational in late 2014.

Our longstanding Middle East operations continue to be highly successful. In Qatar, we are making good progress on the fourth phase of field development of Idd El Sharqi North Dome, and we have received approval for ongoing field development of Idd El Sharqi South Dome and Al Rayyan, including additional drilling through 2013. At the Mukhaizna Field in Oman, where we have a world-class steam flood for enhanced oil recovery, average gross daily production in 2012 was more than 15 times the production rate of September 2005, when Oxy assumed operations.

Our long-term success would not be sustainable without an unwavering commitment to social responsibility: maintaining high ethical standards, and conducting our business in a manner that safeguards and benefits our employees, our neighbors and the environment.

We help strengthen local economies where we operate by creating jobs and ensuring our workers are provided the best possible training. We also contribute significant tax revenues, and purchase a wide range of local goods and services. All these activities play a significant role in supporting and enhancing the communities where we operate, and where our employees live.

At every Oxy business location, safety is our foremost priority. Our 2012 worldwide employee Injury and Illness Incidence Rate (IIR) of 0.33 was the best in our history — and significantly better than the 2011 all-U.S. industry average IIR of 3.5.

Our commitment to environmental stewardship ranges from cost-effectively reducing emissions at our plants and facilities to supporting biodiversity and habitat conservation programs on our properties. We are proud to have received recognition from government agencies and the Wildlife Habitat Council for our environmental performance.

In addition, a number of prominent publications have ranked Oxy among the national and global leaders in corporate citizenship. In 2012, we were recognized by Fortune, whose World’s Most Admired Companies survey ranks Oxy No. 1 in the Mining, Crude-Oil Production category; Barron’s, which includes Oxy on its list of the World’s Most Respected Companies; and Corporate Responsibility Magazine, which lists Oxy among the 100 Best Corporate Citizens.

It is the people of Oxy who make us a strong, growing company with an exciting future. I want to thank our talented and hard-working employees and management team for their daily dedication to excellence, and my fellow members of the Board of Directors for their invaluable advice and counsel.

Our stakeholders around the world count on Oxy to deliver top performance and added value. We work hard every day in every way to meet those expectations, and we look forward to a successful 2013.



Ray R. Irani
Executive Chairman



# INVESTING
IN GROWTH

# As we report on Oxy’s financial and operational performance in 2012, I want to take this opportunity to reflect on our strategy, our progress and our future.

We continue to focus on three main objectives for the company: achieve production growth in the oil and gas business; generate rates of return on invested capital significantly in excess of our cost of capital; and deliver consistent annual dividend growth.
By these measures, our performance in 2012 was solid. We achieved record average worldwide oil and gas production of 766,000 barrels of oil equivalent per day (BOEPD) — up about 5 percent from last year. Our 2012 total company reserve replacement ratio \( ^{1} \)  from all categories, including revisions, was 143 percent. Our chemical and midstream businesses continued to be highly profitable. We delivered return on equity (ROE), using core results, \( ^{2} \)  of 14.6 percent and return on capital employed (ROCE) of 12.6 percent. In February 2012, the Board of Directors raised the dividend 17 percent to an annual rate of 2.16 per share.

While we met these goals, 2012 also presented challenges. Our average realized price fell companywide, driven largely by lower domestic natural gas and natural gas liquids (NGL) prices. We were also affected by the large differential between West Texas Intermediate (WTI) and Brent prices. Our near-term capital efficiency declined, in part due to the high capital associated with our longer-term projects. In addition, our focus on growing production led to some short-term inefficiencies, resulting in increases in operating and other costs.

Oil and gas prices are the major variables that drive our industry’s financial performance. Average realized oil prices were slightly higher in 2012 than 2011, but the average domestic natural gas price decreased significantly — by 35 percent. The average WTI price declined by nearly $1.00 per barrel in 2012, which had a significant negative impact on our domestic earnings, and international oil prices increased by almost $1.00 with a positive impact on our Middle East/North Africa (MENA) operations.

While commodity prices are market-driven, we are taking steps to address the factors that are within our control, including our capital efficiency and production costs. We are investing in the construction of the BridgeTex Pipeline, which should improve realized oil prices from Permian operations. In late 2012 we embarked on a program to improve capital efficiency in the oil and gas business by at least 15 percent. Our program also is targeting operating costs, in order to create higher margins for our production. Fourth quarter 2012 production costs were already down $1.04 per barrel from the prior quarter. We expect to see continued improvement through 2013, with about $450 million in annualized operating cost savings over 2012.

Looking ahead, we continue to target annual production growth, supported by our capital program, a substantial inventory of high-return projects and attractive value-added acquisitions. In the current price environment, we expect most of our growth to come from oil. Growth opportunities must meet our long-established criteria for expected financial returns of at least 15 percent after tax for U.S. assets, and at least 20 percent after tax for international assets.

Oxy’s growth will be most strongly affected by the success of the development plans for our Permian, California and Oman assets and the



CORE RESULTS \( ^{2} \) 
$ in billions



ANNUAL DIVIDEND RATE
In dollars






Al Hosn Gas Project in the United Arab Emirates (UAE). In addition, our domestic acquisition program should provide substantial growth and cash generation for the company over the long term.

Consistent dividend growth is an important part of our business strategy. In February 2013, the Board announced a further 18.5-percent increase to an annualized rate of $2.56 per share. We have now raised our dividend every year for 11 consecutive years and a total of 12 times since 2002, increasing it 412 percent over the period.

We returned $2.3 billion to shareholders in 2012 in the form of dividends (excluding the fourth-quarter accelerated payout) and share repurchases. Last year’s dividends alone, excluding the accelerated payout, were $1.7 billion. We are proud that our record of consistently raising our dividend has been acknowledged with Oxy’s inclusion in Mergent’s Dividend Achievers indices for 2013. These highly regarded indices track companies with strong long-term dividend growth.

Reflecting the company’s low-risk, low-leverage profile, we have maintained our “A” ratings from all of the major debt rating firms, including Moody’s Investors Service, Standard & Poor’s Ratings Services, Fitch Ratings and DBRS. These high ratings positively impact Oxy’s ability to compete for large-scale projects.

Protecting the safety of Oxy’s employees, contractors and neighbors around the world is a core value and a collective responsibility that we take very seriously. In 2012, based on U.S. Department of Labor metrics, our employees and contractors achieved their best safety performance in the company’s history.
Another companywide imperative, essential to maintaining Oxy’s reputation as a respected producer of oil and gas and chemicals, is to safeguard the environment. We address this in a variety of ways, including our extensive reuse and recycling of water and carbon dioxide, our investments in energy efficiency and mechanical integrity, and our recognized habitat conservation programs.

We are optimistic that our strategic investments, combined with our ongoing program to achieve operating efficiencies, will yield significant benefits in 2013 and beyond. We believe that our performance criteria of production growth, high return on investment and consistent dividend growth continue to be the right formula to generate future value for Oxy’s stockholders.

## 2012 OIL AND GAS PERFORMANCE

Our business strategy is designed to maintain our emphasis on oil production growth in a highly focused manner. We operate in three core geographic regions: the United States, the Middle East/North Africa and Latin America. We prefer to hold large, long-lived “legacy” oil and gas assets, like those in California and the Permian Basin of West Texas and southeast New Mexico, that tend to have enhanced secondary and tertiary recovery opportunities and economies of scale that lead to cost-effective production. We also focus a portion of our drilling activities on unconventional opportunities.

Our average worldwide oil and gas production was 76,000 BOEPD, compared to 733,000 BOEPD in 2011. Oil and gas segment core earnings were $8.8 billion for 2012, compared with $10.3 billion for 2011. A variety of factors contributed to the earnings decrease. Lower realized product prices reduced our earnings by approximately $530 million. Higher depreciation, depletion and amortization (DD&A) rates and operating costs negatively impacted our earnings by approximately $780 million and $680 million, respectively. These more than offset the positive contribution from higher production of about $700 million.

On a year-over-year basis, Oxy’s realized prices improved for crude oil but declined for natural gas and NGLs. Our worldwide crude oil prices averaged $99.87 per barrel for 2012, compared with $97.92 per barrel for 2011. Worldwide NGL prices were $45.18 per barrel for 2012, compared with $55.53 per barrel for 2011. Domestic gas prices declined 35 percent, from $4.06 per thousand cubic feet (Mcf) in the 12 months of 2011 to $2.62 per Mcf in the 12 months of 2012.

In 2012, our average DD&A rate was about $14 per barrel, up from $11.48 the previous year. The DD&A rate is a result of finding and development (F&D) costs for proved reserve additions spread over the average life of the company’s reserve base. Industrywide F&D costs have been increasing, driving up DD&A rates. We believe that our capital efficiency program will moderate the increase in our DD&A rates going forward.

Our average production costs for 2012 were $14.99 per barrel, compared to $12.84 per barrel for 2011. A number of internal and external factors, ranging from our efforts to accelerate production through workovers, higher maintenance activities and field support costs, to inflation in the oil services industry, combined to drive up our operating costs.



We produced approximately 280 million BOE in 2012. Our 2012 total company reserve replacement ratio from all categories, including revisions, was 143 percent — resulting in about 400 million barrels of proved reserve additions for 2012. Lower domestic natural gas prices and the resulting changes in Oxy’s plans for drilling on gas properties constituted a majority of the negative revisions. Our 2012 program, excluding acquisitions and revisions, replaced about 175 percent of our production with about 490 million barrels of reserve additions. Including



acquisitions but excluding revisions of prior-year estimates, we replaced 209 percent of our production. We believe that these measures demonstrate the progress of our development and acquisition programs.

United States Oil and Gas Operations
Oxy is the largest onshore producer of oil and liquids combined in the 48 contiguous United States. We are the No. 1 oil producer in Texas, America’s No. 1 oil-producing state, and the largest oil producer in the Permian Basin, where we have total interests of 2.5 million net acres. In California, Oxy is the largest natural gas producer and largest oil and gas producer on a gross-operated BOE basis, and we are the state’s top acreage holder, with 2.1 million net acres, the large majority of which are net fee mineral interests.

Our U.S. assets built on their strong 2011 performance in 2012. We again achieved record domestic production, averaging 465,000 BOEPD — 61 percent of Oxy’s worldwide production for the year. Compared to 2011, total domestic production grew by 9 percent, or 37,000 BOEPD. Domestic oil production grew by 11 percent, from 230,000 barrels per day in 2011 to 255,000 barrels per day in 2012. Our fourth-quarter 2012 domestic production of 475,000 BOEPD set a company record for the ninth consecutive quarter.

Lower prices for all products reduced our domestic income by over $800 million. Higher operating costs reduced our domestic earnings by approximately $600 million and higher DD&A rates by nearly $500 million. The higher domestic production added approximately $850 million to our earnings for the year.

In 2013, we project lower overall capital expenditures in the U.S. compared to 2012 as a result of savings from our operational efficiency program and reduced gas-related drilling. We anticipate that domestic oil production will continue to grow, which will improve our price realizations per barrel of oil equivalent.

Oxy’s flagship U.S. operation is in the Permian Basin, where we are the largest producer of crude oil, with an approximately 16-percent net share of total oil production. Our 2012 Permian production of 207,000 BOEPD represented more than 25 percent of the company’s worldwide total.

Also in the Permian, we are jointly developing the BridgeTex Pipeline with Magellan Midstream Partners, L.P. Extending from Colorado City, Texas, to the Houston Gulf Coast, this new crude oil pipeline system will provide shippers and refiners with improved access to our and third-party Permian oil production. This should help to increase oil price realizations in the Permian Basin.

Our strong position throughout California includes diverse geological characteristics and numerous reservoir targets, with development opportunities ranging from conventional to shale. A new organizational structure for our California operations is enhancing our ability to apply the specific expertise needed to profitably develop these complex reservoirs. Oxy’s total share of production in California was approximately 148,000 BOEPD in 2012, an increase of 7 percent compared to 2011.

In North Dakota, which in 2012 became the nation’s No. 2 oil-producing state, we have more than 340,000 net acres with significant resource potential in the prolific Williston Basin, including acreage in the Bakken and Three Forks formations. We estimate this acreage to hold about 250 million net barrels of oil. Oxy’s Williston Basin production has more than doubled since we entered the area in 2011. We believe our total resource base in the Williston Basin represents a significant opportunity for the company over the long term.

In addition, Oxy holds over 2.4 million net acres in the midcontinent, including substantial interests in the Hugoton Field in Kansas, Colorado and Oklahoma; the Pieceance Basin in Colorado; and our South Texas assets. These are mostly natural-gas-prone assets where we have reduced our drilling activity. We have the ability to ramp up gas production as prices for natural gas and associated liquids warrant.

Middle East Oil and Gas Operations
With more than four decades of experience in the MENA region, Oxy is highly regarded for its technical expertise, safe and cost-efficient project management, and effective working relationships. In 2012, 35 percent of Oxy’s worldwide production — about 270,000 BOEPD — came from our operations in Qatar, Oman, Bahrain, Iraq, Yemen and Libya.

Our MENA operations benefited from higher international oil prices, which added $260 million to our earnings. Higher DD&A rates, higher operating expenses and lower volumes offset the positive price effect by approximately $270 million, $60 million and $120 million, respectively, resulting in a modest year-over-year reduction in earnings.

Oxy is the second-largest oil producer offshore Qatar, where we operate Idd El Sharqi North Dome, Idd El Sharqi South Dome and Al Rayyan. In addition, Oxy participates in the Dolphin Gas Project, the premier transborder natural gas project in the Middle East. Dolphin delivers natural gas from Qatar’s North Field to customers in the UAE and Oman. Our share of production from Qatar was approximately 114,000 BOEPD in 2012.

During more than 30 years of operations in Oman, Oxy has continuously increased production and reserves, and today is the country’s second-largest oil producer. Our share of production from Oman was approximately 76,000 BOEPD in 2012. At the Mukhaizna Field in south-central Oman, where we are implementing a major steam flood project, the 2012 average gross daily production was approximately 120,000 BOEPD — more than 15 times the production rate in September 2005. We expect Oman to be an ongoing growth driver for the company.

Latin America Oil and Gas Operations
Our Latin America operations, which are primarily focused in Colombia, provided 4 percent of the company’s worldwide production in 2012.

While earnings from these operations declined slightly compared to 2011 due to lower volumes, our Latin America assets continue to generate strong returns and substantial amounts of free cash flow.

## 2012 MIDSTREAM AND MARKETING PERFORMANCE

Oxy’s midstream and marketing segment gathers, processes, transports, stores, purchases and markets oil, condensate, NGLs, natural gas,  \( CO_{2} \) , and power. A primary goal of the midstream business is to maximize realized value for Oxy’s and third-party marketed production by providing access options to markets, optimizing existing assets and building out key assets across the value chain. It is a vital contributor to the success of Oxy’s oil and gas operations.

We expect our midstream businesses to be a significant growth driver for the company over time. Segment earnings in 2012 were $439 million, compared with $448 million in 2011.



Income from our interests in the Dolphin and Plains All American pipelines represented approximately 60 percent of our midstream earnings in 2012.

2012 CHEMICALS PERFORMANCE
Occidental Chemical Corporation
(OxyChem), a wholly owned subsidiary,
mainly manufactures and markets
basic chemicals and vinyls used in
water treatment, paper production,
pharmaceuticals, construction, automobile
manufacturing, soaps and disinfecting
products, among numerous other beneficial
applications. For every product it markets
in the U.S., OxyChem’s market position
is No. 1 or No. 2. The company is a safety
leader in its industry and a consistently
profitable performer.

Chemical segment earnings in 2012 were $720 million, compared with $861 million in 2011. These results are well above OxyChem’s average annual earnings of $615 million over the past five years. The year-over-year reduction was primarily a result of lower margins due to weaker economic conditions in Europe and Asia, and increased competitive activity from these regions. In addition, the calcium chloride and potassium hydroxide businesses were negatively impacted by mild winter and drought conditions in the U.S.

## INVESTING FOR THE FUTURE

We devoted $10.2 billion to capital expenditures during 2012, of which approximately 80 percent was directed to the oil and gas segment. In 2013 we are planning to spend approximately 6 percent less, for a total capital program of $9.6 billion. The reduction in capital will come entirely from the domestic oil and gas business. Our overall 2013 capital program is estimated to be about 75 percent in oil and gas, 11 percent in the Al Hosn Gas Project, 9 percent in the domestic midstream businesses and the remainder in chemicals.

We are currently in an investment phase where a higher-than-normal portion of our capital — about 25 percent in 2013 — is spent on longer-term projects that should begin contributing to our operations over the next few years. These include the Al Hosn Gas Project, the BridgeTex Pipeline, a new chemical plant in Tennessee, and enhancements to our gas and  \( CO_{2} \)  processing plants to expand their capacity. We expect the accumulated balance of these project costs, which currently do not contribute to our earnings, to grow from approximately 3 billion to approximately 5 billion by the end of 2013. Once these projects come online in 2014 and 2015, we expect them to make significant contributions to our earnings and cash flow.

The Al Hosn Gas Project is slated to begin operations in late 2014. Oxy’s net share of production is expected to be more than 200 million cubic feet per day of natural gas, and more than 20,000 barrels per day of NGLs and condensate. Development capital was approximately $1.2 billion in 2012 and will be approximately $1 billion for 2013. While the Al Hosn Gas Project is capital-intensive during its development phase, after operations begin we expect to see a major shift as it transitions from being a cash consumer to a cash generator. Based on our 2012 capital spending for the project, this would equate to a $1.8-billion increase in annual cash flow.

We are also making investments in our domestic midstream business with a view to increase our oil price realizations, particularly for the oil produced in our Permian operations. We are spending $400 million to develop the BridgeTex Pipeline with Magellan Midstream Partners, L.P. The pipeline is currently under construction in Texas and scheduled to begin service in mid-2014 with initial capacity of approximately 300,000 barrels per day. Oxy is the anchor shipper with a significant volume commitment on this pipeline. It will provide shippers with access to more than 2.2 million barrels per day of refining capacity, as well as large transportation hubs and third-party terminals and distribution systems.

In our chemical segment, construction is under way on a membrane cell chlor-alkali plant adjacent to DuPont’s titanium dioxide plant in New Johnsonville, Tennessee. We expect it to be completed by the fourth quarter of 2013. OxyChem plans to supply chlorine and caustic soda to DuPont for its use in producing titanium dioxide.

## IN CLOSING

We have long believed that the job of management is to convert retained earnings into stock market value. Historically, Oxy has generated close to $1.50 in value for every dollar we kept. This is a challenging proposition as the company continues to grow, especially during our current long-term investment phase. We are fortunate to have an extensive portfolio of development opportunities that should enable Oxy to consistently deliver above-cost-of-capital returns.

While commodity prices and higher costs negatively impacted our 2012 earnings, we are doing everything possible to improve our results for those factors that are within our control. We are investing in projects we believe will improve our realized product prices and generate free cash flow and strong earnings. We are working to improve capital efficiency and targeting costs to increase margins across the oil and gas business. And we are increasing our oil drilling and scaling back drilling in natural-gas-prone areas. Our goal is to achieve all of this while maintaining our excellent safety record as well as production growth.

Also integral to our success is our commitment to social responsibility. We strive to create positive impacts in every community where we operate. As we conduct our business, we stimulate local economies through our purchasing activities, tax payments, capital investments and, significantly, job creation and training.

It is essential that we invest not only in our operations and facilities, but in the people who drive Oxy’s success: our global workforce and management team. We must ensure that Oxy always has the talent in place to meet the needs of the company and the competitive challenges of our industry. Along with investing in our assets and employees, we place a strong emphasis on innovation — in the management of our assets, in our work processes, and in how we identify and pursue opportunities.

As always, our overarching goal of maximizing stockholder return is guided by our core values of integrity, investment and innovation.

As demonstrated by our 2012 results, the fundamentals of our business are strong. We are confident that we will again deliver exceptional value to Oxy’s investors and stakeholders around the world.



Stephen I. Chazen

President and Chief Executive Officer




## BOARD OF DIRECTORS

Spencer Abraham \( ^{2,3,4,5} \) 
Chairman and Chief Executive Officer,
The Abraham Group, LLC;
Former U.S. Secretary of Energy

Howard I. Atkins \( ^{1,2,6} \) 
Former Senior Executive Vice President and
Chief Financial Officer, Wells Fargo & Company
Stephen I. Chazen
President and Chief Executive Officer,
Occidental Petroleum Corporation

Edward P. Djerejian \( ^{2,3,4,5} \) 
Director, James A. Baker III Institute for Public Policy; Former U.S. Ambassador

John E. Feick \( ^{1,3,6} \) 
Chairman, Matrix Solutions Inc.

Margaret M. Foran \( ^{3,4} \) 
Chief Governance Officer, Vice President and
Corporate Secretary, Prudential Financial, Inc.

Carlos M. Gutierrez \( ^{3,6} \) 
Chairman, Republicans for Immigration Reform;
Former U.S. Secretary of Commerce;
Former President and Chairman, Kellogg Company

## OFFICERS

Stephen I. Chazen
President and Chief Executive Officer

Dr. Ray R. Irani
Executive Chairman

Donald P. de Brier
Corporate Executive Vice President
and Corporate Secretary

EXECUTIVE VICE PRESIDENTS
WCW (Willie) Chiang
Executive Vice President – Operations

Martin A. Cozyn
Executive Vice President – Human Resources

James M. Lienert
Executive Vice President – Business Support

Cynthia L. Walker
Executive Vice President and
Chief Financial Officer

VICE PRESIDENTS AND KEY EXECUTIVES
William E. Albrecht
Vice President; President, Americas, Oxy Oil and Gas

John C. Ale
Vice President and General Counsel

B. Chuck Anderson
Vice President; President,
Occidental Chemical Corporation

Gary L. Daugherty
Vice President – Internal Audit




Dr. Ray R. Irani
Executive Chairman,
Occidental Petroleum Corporation

Avedick B. Poladian \( ^{1,2,6} \) 
Executive Vice President and Chief Operating Officer, Lowe Enterprises, Inc.

Ian M. Davis
Vice President – Government Relations

Vicki Hollub
Executive Vice President – California Operations,
Oxy Oil and Gas

Edward A. Lowe
Vice President; President, Oxy Oil and Gas –
International Production

John R. Martin
Vice President – Security

Aziz D. Syriani \( ^{14} \) 
Lead Independent Director
President and Chief Executive Officer,
The Olayan Group

Rosemary Tomich \( ^{1,2,3,4,5} \) 
Owner, Hope Cattle Company and A.S. Tomich
Construction Company; Chairman and Chief
Executive Officer, Livestock Clearing, Inc.

Donald L. Moore, Jr.
Vice President and Chief Information Officer

Dale A. Petroskey
Vice President – Public Affairs

Roy Pineci
Vice President, Controller and
Principal Accounting Officer

Anita M. Powers
Vice President; Executive Vice President –
Worldwide Exploration, Oxy Oil and Gas
As of December 31, 2012
1 Member of the Audit Committee
2 Member of the Executive Compensation and Human Resources Committee
3 Member of the Environmental, Health and Safety Committee
4 Member of the Corporate Governance, Nominating and Social Responsibility Committee
5 Member of the Charitable Contributions Committee
6 Member of the Finance and Risk Management Committee

Melissa E. Schoeb
Vice President – Corporate Communications

Christopher G. Stavros
Vice President – Investor Relations and Treasurer

Todd A. Stevens
Vice President – Corporate Development

Michael S. Stutts
Vice President – Tax

Charles F. Weiss
Vice President – Health, Environment and Safety



Our stakeholders around the world count on Oxy to deliver top performance and added value. We work hard every day in every way to meet those expectations.






Auditors
KPMG LLP
Los Angeles, California

Transfer Agent and Registrar
American Stock Transfer and
Trust Company, LLC
Shareholder Services
6201 15 \( ^{th} \)  Avenue
Brooklyn, NY 11219
(877) OXY-8166
www.amstock.com

## Stock Exchange Listing

Oxy’s common stock is listed on the New York Stock Exchange (NYSE). The symbol is OXY.

## Dividend Reinvestment Plan

Occidental stockholders owning at least 25 shares of common or preferred stock registered in their name are eligible to purchase additional shares of common stock under the Dividend Reinvestment Plan by investing dividends on the greater of 25 shares or 10 percent of their share balance of common or preferred stock and making optional cash investments of up to $10,000 per month. Information may be obtained from: American Stock Transfer and Trust Company, LLC at www.amstock.com.

## Annual Certifications

Occidental has filed the certifications of the chief executive officer and chief financial officer required by Section 302 of the Sarbanes-Oxley Act of 2002 as Exhibits 31.1 and 31.2 to its 2012 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In addition, in 2012, Occidental submitted to the NYSE a certificate of the chief executive officer stating that he is not aware of any violation by the company of the NYSE corporate governance listing standards.

Current News and General Information
Information about Occidental Petroleum, including news releases, is available at www.oxy.com. In addition, our investor package is available by calling toll-free 1-888-OXYPETE (1-888-699-7383).

## AVAILABLE TO STOCKHOLDERS

Oxy’s Social Responsibility Report and Fast Facts brochures are available by writing to Occidental corporate headquarters and at www.oxy.com.





Oil, Gas and Chemicals
Oxy is an independent oil and gas company with operations in the United States, Europe, and Australia. We are committed to operating in a responsible manner. Our activities are subject to a range of laws and regulations. Please see our website for more information.

Demand for Growth
In 2012, Oxy's operations are positioned to grow demand for the company's products and services in the company's markets.

Socially Responsible
Oxy believes it is crucial that our operations are conducted in a manner that is consistent with our values, environment and our customers.



This annual report is printed on Forest Stewardship Council (FSC \( ^{®} \) )-Certified paper that contains wood from well-managed forests, controlled sources and recycled wood or fiber.



CORPORATE HEADQUARTERS
10889 Wilshire Boulevard
Los Angeles, California 90024-4201
(310) 208-8800
www.oxy.com

INVESTOR RELATIONS
1230 Avenue of the Americas
8 \( ^{th} \)  Floor, Suite 800
New York, New York 10020-1508
(212) 603-8111
investorrelations@oxy.com

GOVERNMENT RELATIONS
1717 Pennsylvania Avenue, NW
Suite 400
Washington, D.C. 20006-4614
(202) 857-3000

## OIL AND GAS

Occidental Oil and Gas Corporation
5 Greenway Plaza
Houston, Texas 77046-0506
P.O. Box 27570
Houston, Texas 77227-7570
(713) 215-7000

## CHEMICALS

Occidental Chemical Corporation
Occidental Tower
5005 LBJ Freeway
Dallas, Texas 75244-6119
P.O. Box 809050
Dallas, Texas 75380-9050
(972) 404-3800

## ENERGY MARKETING

Occidental Energy Marketing, Inc.
5 Greenway Plaza
Houston, Texas 77046-0506
P.O. Box 27570
Houston, Texas 77227-7570
(713) 215-7000



# UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 10-K

☑ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 19

For the fiscal year ended December 31, 2012
For the transition period from to

Commission File Number 1-9210

## Occidental Petroleum Corporation

(Exact name of registrant as specified in its charter)

State or other jurisdiction of incorporation or organization

I.R.S. Employer Identification No.

Delaware

95-4035997

Address of principal executive offices

10889 Wilshire Blvd., Los Angeles, CA

Zip Code

90024

Registrant's telephone number, including area code

(310) 208-8800

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

Title of Each Class

9 1/4% Senior Debentures due 2019

Common Stock

Name of Each Exchange on Which Registered

New York Stock Exchange

New York Stock Exchange

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

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☑ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act: (Note: Checking the box will not relieve any registrant required to file reports pursuant to Section 13 or 15(d) of the Exchange Act from their obligations under those Sections). Yes ☐ No ☑

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. Yes ☐ No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Date File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or such shorter period as the registrant was required to submit and post files). Yes ☐ No ☐

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. (See definition of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act).

Large Accelerated Filer ☑ Accelerated Filer ☐

Non-Accelerated Filer ☐ Smaller Reporting Company ☐

Indicate by check mark whether the registrant is a shell company (as defined in Exchange Act Rule 12b-2) Yes ☐ No ☑

The aggregate market value of the voting common stock held by nonaffiliates of the registrant was approximately $68.1 billion, computed by reference to the closing price on the New York Stock Exchange composite tape of $85.77 per share of Common Stock on June 30, 2012. Shares of Common Stock held by each executive officer and director have been excluded from this computation in that such persons may be deemed to be affiliates. This determination of potential affiliate status is not a conclusive determination for other purposes.

At January 31, 2013, there were 805,515,153 shares of Common Stock outstanding.

## DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant's definitive Proxy Statement, relating to its May 3, 2013 Annual Meeting of Stockholders, are incorporated by reference into Part III.



## TABLE OF CONTENTS

Items 1 and 2 Business and Properties.....3
General.....3
Oil and Gas Operations.....3
Chemical Operations.....4
Midstream, Marketing and Other Operations.....5
Capital Expenditures.....5
Employees.....5
Environmental Regulation.....5
Available Information.....5
Item 1A Risk Factors.....6
Item 1B Unresolved Staff Comments.....7
Item 3 Legal Proceedings.....7
Item 4 Mine Safety Disclosures.....7
Executive Officers.....8
Part II
Item 5 Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.....8
Item 6 Selected Financial Data.....11
Item 7 and 7A Management's Discussion and Analysis of Financial Condition and Results of Operations (MD&A).....11
Strategy.....12
Oil and Gas Segment.....13
Chemical Segment.....19
Midstream, Marketing and Other Segment.....20
Segment Results of Operations.....21
Significant Items Affecting Earnings.....24
Taxes.....24
Consolidated Results of Operations.....24
Consolidated Analysis of Financial Position.....25
Liquidity and Capital Resources.....26
Off-Balance-Sheet Arrangements.....28
Contractual Obligations.....28
Lawsuits, Claims and Contingencies.....29
Environmental Liabilities and Expenditures.....29
Foreign Investments.....30
Critical Accounting Policies and Estimates.....30
Significant Accounting and Disclosure Changes.....34
Derivative Activities and Market Risk.....34
Safe Harbor Discussion Regarding Outlook and Other Forward-Looking Data.....36
Item 8 Financial Statements and Supplementary Data.....37
Management's Annual Assessment of and Report on Internal Control Over Financial Reporting.....37
Report of Independent Registered Public Accounting Firm on Consolidated Financial Statements.....38
Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting.....39
Consolidated Balance Sheets.....40
Consolidated Statements of Income.....42
Consolidated Statements of Comprehensive Income.....43
Consolidated Statements of Stockholders' Equity.....43
Consolidated Statements of Cash Flows.....44
Notes to Consolidated Financial Statements.....45
Quarterly Financial Data (Unaudited).....73
Supplemental Oil and Gas Information (Unaudited).....75
Financial Statement Schedule:
Schedule II – Valuation and Qualifying Accounts.....87
Item 9 Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.....88
Item 9A Controls and Procedures.....88
Disclosure Controls and Procedures.....88
Item 9B Other Information.....88
Part III
Item 10 Directors, Executive Officers and Corporate Governance.....88
Item 11 Executive Compensation.....88
Item 12 Security Ownership of Certain Beneficial Owners and Management.....89
Item 13 Certain Relationships and Related Transactions and Director Independence.....89
Item 14 Principal Accountant Fees and Services.....89
Part IV
Item 15 Exhibits and Financial Statement Schedules.....89



## Part I

## ITEMS 1 AND 2 BUSINESS AND PROPERTIES

In this report, "Occidental" means Occidental Petroleum Corporation, a Delaware corporation (OPC), or OPC and one or more entities in which it owns a controlling interest (subsidiaries). Occidental conducts its operations through various subsidiaries and affiliates. Occidental's executive offices are located at 10889 Wilshire Boulevard, Los Angeles, California 90024; telephone (310) 208-8800.

## GENERAL

Occidental’s principal businesses consist of three segments. The oil and gas segment explores for, develops and produces oil and condensate, natural gas liquids (NGLs) and natural gas. The chemical segment (OxyChem) mainly manufactures and markets basic chemicals and vinyls. The midstream, marketing and other segment (midstream and marketing) gathers, processes, transports, stores, purchases and markets oil, condensate, NGLs, natural gas, carbon dioxide ( \( CO_{2} \) ) and power. It also trades around its assets, including transportation and storage capacity, and trades oil, NGLs, gas and other commodities. The segment also invests in entities that conduct similar activities.
For information regarding Occidental's current developments, segments and geographic areas, see the information in the "Management's Discussion and Analysis of Financial Condition and Results of Operations" (MD&A) section of this report and Note 16 to the Consolidated Financial Statements.

## OIL AND GAS OPERATIONS
General

Occidental’s domestic oil and gas operations are located mainly in California, Colorado, Kansas, New Mexico, North Dakota, Oklahoma, Texas and West Virginia. International operations are located in Bahrain, Bolivia, Colombia, Iraq, Libya, Oman, Qatar, the United Arab Emirates (UAE) and Yemen.

## Proved Reserves and Sales Volumes

The table below shows Occidental’s total oil, NGLs and natural gas proved reserves and sales volumes in 2012, 2011 and 2010. See "MD&A — Oil and Gas Segment," and the information under the caption "Supplemental Oil and Gas Information" for certain details regarding Occidental's proved reserves, the reserves estimation process, sales and production volumes, production costs and other reserves-related data.

## Comparative Oil and Gas Proved Reserves and Sales Volumes

Oil, which includes condensate, and NGLs in millions of barrels; natural gas in billions of cubic feet (Bcf); barrels of oil equivalent (BOE) in millions.

<table><tr><td rowspan="2"></td><td colspan="6">2012</td><td colspan="6">2011</td><td colspan="6">2010</td></tr><tr><td>Oil</td><td>NGLs</td><td>Gas</td><td>BOE</td><td>(a)</td><td>Oil</td><td>NGLs</td><td>Gas</td><td>BOE</td><td>(a)</td><td>OIL</td><td>NGLs</td><td>Gas</td><td>BOE</td><td>(a)</td><td></td><td></td><td></td></tr><tr><td>Proved Reserves</td><td>1,567</td><td>216</td><td>2,889</td><td>2,265</td><td></td><td>1,526</td><td>225</td><td>3,365</td><td>2,313</td><td></td><td>1,460</td><td>237</td><td>3,034</td><td>2,203</td><td></td><td></td><td></td><td></td></tr><tr><td>United States</td><td>469</td><td>116</td><td>2,679</td><td>1,031</td><td></td><td>482</td><td>55</td><td>1,958</td><td>863</td><td></td><td>552</td><td>61</td><td>2,104</td><td>964</td><td></td><td></td><td></td><td></td></tr><tr><td>International (b,c)</td><td>2,036</td><td>332</td><td>5,568</td><td>3,296</td><td>(d)</td><td>2,008</td><td>280</td><td>5,323</td><td>3,176</td><td>(d)</td><td>2,012</td><td>298</td><td>5,138</td><td>3,167</td><td>(d)</td><td></td><td></td><td></td></tr><tr><td>Total</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Sales Volumes</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>United States</td><td>93</td><td>27</td><td>300</td><td>170</td><td></td><td>84</td><td>25</td><td>285</td><td>156</td><td></td><td>80</td><td>19</td><td>247</td><td>140</td><td></td><td></td><td></td><td></td></tr><tr><td>International (b,c)</td><td>78</td><td>3</td><td>170</td><td>110</td><td></td><td>80</td><td>4</td><td>162</td><td>111</td><td></td><td>83</td><td>5</td><td>172</td><td>117</td><td></td><td></td><td></td><td></td></tr><tr><td>Total</td><td>171</td><td>30</td><td>470</td><td>280</td><td></td><td>164</td><td>29</td><td>447</td><td>267</td><td></td><td>163</td><td>24</td><td>419</td><td>257</td><td></td><td></td><td></td><td></td></tr></table>

Note: The detailed proved reserves information presented in accordance with Item 1202(a)(2) to Regulation S-K under the Securities Exchange Act of 1934 (Exchange Act) is provided on pages 75-78.

(a) Natural gas volumes have been converted to BOE based on energy content of six thousand cubic feet (Mcf) of gas to one barrel of oil. Barrels of oil equivalence does not necessarily result in price equivalence. The price of natural gas on a barrel of oil equivalent basis is currently substantially lower than the corresponding price for oil and has been similarly lower over the recent past. For example, in 2012, the average prices of West Texas Intermediate (WTI) oil and New York Mercantile Exchange (NYMEX) natural gas were $94.21 per barrel and $2.81 per Mcf, respectively, resulting in an oil to gas ratio of over 30.

(b) Excludes volumes from the Argentine operations sold in February 2011 and classified as discontinued operations.

(c) Reserves exclude the former noncontrolling interest in a Colombian subsidiary because, on December 31, 2010, Occidental restructured its Colombian operations to take a direct working interest in the related assets. The 2010 sales volumes include the noncontrolling interest in the Colombian subsidiary, while the 2012 and 2011 sales volumes exclude such amounts.

(d) Stated on a net basis after applicable royalties. Includes proved reserves related to production-sharing contracts (PSCs) and other similar economic arrangements of 0.9 billion BOE in 2012, 1.0 billion BOE in 2011 and 1.1 billion BOE in 2010.



## Competition

As a producer of oil and condensate, NGLs and natural gas, Occidental competes with numerous other domestic and foreign private and government producers. Oil, NGLs and natural gas are commodities that are sensitive to prevailing global and, in certain cases local, current and anticipated market conditions. They are sold at current market prices or on a forward basis to refiners and other market participants. Occidental's competitive strategy relies on increasing production through developing conventional and unconventional mature and underdeveloped fields, enhanced oil recovery (EOR) projects and strategic acquisitions. Occidental also competes to develop and produce its worldwide oil and gas reserves cost-effectively and obtain qualified labor and services.

## CHEMICAL OPERATIONS
General

OxyChem owns and operates manufacturing plants at 22 domestic sites in Alabama, Georgia, Illinois, Kansas, Louisiana, Michigan, New Jersey, New York, Ohio, Pennsylvania and Texas and at two international sites in Canada and Chile. It also has an interest in a Brazilian joint venture.

## Competition

OxyChem competes with numerous other domestic and foreign chemical producers. For every product it manufactures and markets, OxyChem's market position was first or second in the United States and first, second or third in the world in 2012. OxyChem's competitive strategy is to be a low-cost producer of its products in order to compete on price.

OxyChem produces the following products:

<table><tr><td>Principal Products</td><td>Major Uses</td><td>Annual Capacity</td></tr><tr><td>Basic Chemicals</td><td></td><td></td></tr><tr><td>Chlorine</td><td>Raw material for ethylene dichloride (EDC), water treatment and pharmaceuticals</td><td>4.0 million tons (a)</td></tr><tr><td>Caustic soda</td><td>Pulp, paper and aluminum production</td><td>4.2 million tons (a)</td></tr><tr><td>Chlorinated organics</td><td>Refrigerants, silicones and pharmaceuticals</td><td>0.9 billion pounds</td></tr><tr><td>Potassium chemicals</td><td>Fertilizers, batteries, soaps, detergents and specialty glass</td><td>0.4 million tons</td></tr><tr><td>EDC</td><td>Raw material for vinyl chloride monomer (VCM)</td><td>2.4 billion pounds (a)</td></tr><tr><td>Chlorinated isocyanurates</td><td>Swimming pool sanitation and disinfecting products</td><td>131 million pounds</td></tr><tr><td>Sodium silicates</td><td>Catalysts, soaps, detergents and paint pigments</td><td>0.6 million tons</td></tr><tr><td>Calcium chloride</td><td>Ice melting, dust control, road stabilization and oil field services</td><td>0.7 million tons</td></tr><tr><td>Vinyls</td><td></td><td></td></tr><tr><td>VCM</td><td>Precursor for polyvinyl chloride (PVC)</td><td>6.2 billion pounds</td></tr><tr><td>PVC</td><td>Piping, building materials, and automotive and medical products</td><td>3.7 billion pounds</td></tr><tr><td>Other Chemicals</td><td></td><td></td></tr><tr><td>Resorcinol</td><td>Tire manufacture, wood adhesives and flame retardant synergist</td><td>50 million pounds</td></tr></table>

(a) Includes gross capacity of a joint venture in Brazil, owned 50 percent by Occidental.



## MIDSTREAM AND MARKETING OPERATIONS

The midstream and marketing operations are conducted in the locations described below:

<table><tr><td>Location</td><td>Description</td><td>Capacity</td></tr><tr><td>Gas Plants</td><td></td><td></td></tr><tr><td>California, Texas, New Mexico and Colorado</td><td>Occidental- and third-party-operated natural gas gathering, compression and processing systems, and CO2 processing</td><td>3.1 billion cubic feet per day</td></tr><tr><td>Pipelines</td><td></td><td></td></tr><tr><td>Texas, New Mexico and Oklahoma</td><td>Common carrier oil pipeline and storage system</td><td>365,000 barrels of oil per day 5.8 million barrels of oil storage 2,700 miles of pipeline</td></tr><tr><td>Texas, New Mexico and Colorado</td><td>CO2 fields and pipeline systems transporting CO2 to oil and gas producing locations</td><td>2.4 billion cubic feet per day</td></tr><tr><td>Dolphin Pipeline - Qatar and United Arab Emirates</td><td>Equity investment in a natural gas pipeline</td><td>3.2 billion cubic feet of natural gas per day (a)</td></tr><tr><td>Western and Southern United States and Canada</td><td>Equity investment in entity involved in pipeline transportation, storage, terminalling and marketing of oil, gas and related petroleum products</td><td>18,800 miles of pipeline and gathering systems (b) Storage for 135 million barrels of oil and other petroleum products and 93 billion cubic feet of natural gas (b)</td></tr><tr><td>Marketing and Trading</td><td></td><td></td></tr><tr><td>Texas, Connecticut, United Kingdom, Singapore and other</td><td>Trades around its assets, including transportation and storage capacity, and purchases, markets and trades oil, NGLs, gas, power and other commodities</td><td>Not applicable</td></tr><tr><td>Power Generation</td><td></td><td></td></tr><tr><td>California, Texas and Louisiana</td><td>Occidental-operated power and steam generation facilities</td><td>1,800 megawatts per hour and 1.6 million pounds of steam per hour</td></tr></table>

(a) Pipeline currently transports 2.3 Bcf per day. Additional gas compression and customer contracts are required to reach capacity.

(b) Amounts are gross, including interests held by third parties.

## CAPITAL EXPENDITURES

For information on capital expenditures, see the information under the heading "Liquidity and Capital Resources" in the MD&A section of this report.

## EMPLOYEES

Occidental employed approximately 12,300 people at December 31, 2012, 8,700 of whom were located in the United States. Occidental employed approximately 8,000 people in the oil and gas and midstream and marketing segments and 3,000 people in the chemical segment. An additional 1,300 people were employed in administrative and headquarters functions. Approximately 800 U.S.-based employees and 700 foreign-based employees are represented by labor unions.

Occidental has a long-standing strict policy to provide fair and equal employment opportunities to all applicants and employees.

## ENVIRONMENTAL REGULATION

For environmental regulation information, including associated costs, see the information under the heading "Environmental Liabilities and Expenditures" in the MD&A section of this report and "Risk Factors."

## AVAILABLE INFORMATION

Occidental makes the following information available free of charge on its website at www.oxy.com:

Forms 10-K, 10-Q, 8-K and amendments to these forms as soon as reasonably practicable after they are electronically filed with, or furnished to, the Securities and Exchange Commission (SEC);

➢ Other SEC filings, including Forms 3, 4 and 5; and

Corporate governance information, including its corporate governance guidelines, board-committee charters and Code of Business Conduct. (See Part III, Item 10, of this report for further information.)

Information contained on Occidental's website is not part of this report.



## ITEM 1A RISK FACTORS

Volatile global and local commodity pricing strongly affects Occidental’s results of operations.

Occidental’s financial results correlate closely to the prices it obtains for its products, particularly oil and, to a lesser extent, natural gas and its chemical products.

Changes in consumption patterns, global and local economic conditions, inventory levels, production disruptions, the actions of OPEC, currency exchange rates, worldwide drilling and exploration activities, technological developments, weather, geophysical and technical limitations, transportation bottlenecks and other matters affect the supply and demand dynamics of oil and gas, which, along with the effect of changes in market perceptions, contribute to price unpredictability and volatility.

Demand and, consequently, the price obtained for Occidental’s chemical products correlate strongly to the health of the United States and global economies, as well as chemical industry expansion and contraction cycles. Occidental also depends on feedstocks and energy to produce chemicals, which are commodities subject to significant price fluctuations.

Occidental’s oil and gas business operates in highly competitive environments, which affect, among other things, its results of operations and its ability to grow production and replace reserves.

Results of operations, reserve replacement and growth in oil and gas production depend, in part, on Occidental's ability to profitably acquire, develop or find additional reserves. Occidental has many competitors (including national oil companies), some of which: (i) are larger and better funded, (ii) may be willing to accept greater risks or (iii) have special competencies. Competition for reserves may make it more difficult to find attractive investment opportunities or require delay of reserve replacement efforts. During periods of low product prices, any cash conservation efforts may delay production growth and reserve replacement efforts.

Occidental may experience delays, cost overruns, losses or unrealized expectations in development efforts and exploration activities.

Occidental bears the risks of development delays and cost overruns due to approval delays for drilling and other permits, equipment failures, construction delays, escalating costs or competition for services, materials, supplies or labor, property or border disputes, disappointing reservoir performance and other associated risks that may affect its ability to profitably grow production, replace reserves and achieve its targeted returns.

Exploration is inherently risky. Exploration is subject to delays, misinterpretation of geologic or engineering data, unexpected geologic conditions or finding reserves of disappointing quality or quantity, which may result in significant losses.
Governmental actions and political instability may affect Occidental’s results of operations.

Occidental’s businesses are subject to the decisions of many governments and political interests. As a result, Occidental faces risks of:

new or amended laws and regulations, or interpretations of such laws and regulations, including those related to drilling, manufacturing or production processes (including hydraulic fracturing), labor and employment, taxes, royalty rates, permitted production rates, entitlements, import, export and use of equipment, use of land, water and other natural resources, safety, security and environmental protection, all of which may increase Occidental’s costs or reduce the demand for its products; and

➢ refusal of, or delay in, the extension or grant of exploration, development or production contracts.

Occidental may experience adverse consequences, such as risk of loss or production limitations, because certain of its foreign operations are located in countries occasionally affected by political instability, armed conflict, terrorism, insurgency, civil unrest, security problems, labor unrest, OPEC production restrictions, equipment import restrictions and sanctions. Exposure to such risks may increase if a greater percentage of Occidental’s future oil and gas production comes from foreign sources.

Occidental faces risks associated with its acquisitions and divestitures.

Occidental’s acquisition and divestiture activities carry risks that it may: (i) not fully realize anticipated benefits due to less-than-expected reserves or production or changed circumstances, such as the deterioration of natural gas prices over the last few years; (ii) bear unexpected integration costs or experience other integration difficulties; (iii) experience share price declines based on the market’s evaluation of the activity; or (iv) assume or retain liabilities that are greater than anticipated.

Occidental’s oil and gas reserves are based on professional judgments and may be subject to revision.

Reported oil and gas reserves are an estimate based on engineers' periodic review of reservoir characteristics and recoverability, including production decline rates, operating performance and economic feasibility at the prevailing commodity prices as well as capital and operating costs. If Occidental were required to make significant negative reserve revisions, its results of operations and stock price could be adversely affected.



## Concerns about climate change may affect Occidental's operations.

The U.S. federal government and the state of California have adopted, and other jurisdictions are considering, legislation, regulations or policies that seek to control or reduce the production, use or emissions of “greenhouse gases” (GHG), to control or reduce the production or consumption of fossil fuels, and to increase the use of renewable or alternative energy sources. For example, California’s cap-and-trade program currently applies to Occidental’s operations in the state. The U.S. Environmental Protection Agency has begun to regulate certain GHG emissions from both stationary and mobile sources. The uncertain outcome and timing of existing and proposed international, national and state measures make it difficult to predict their business impact. However, Occidental could face risks of project execution, higher costs and taxes and lower demand for and restrictions on the use of its products as a result of ongoing GHG reduction efforts.

## Occidental's businesses may experience catastrophic events.

The occurrence of events, such as earthquakes, hurricanes, floods, well blowouts, fires, explosions, chemical releases, industrial accidents, physical attacks and other events that cause operations to cease or be curtailed, may negatively affect Occidental's businesses and the communities in which it operates. Third-party insurance may not provide adequate coverage or Occidental may be self-insured with respect to the related losses.

## Cyber attacks could significantly affect Occidental.

Cyber attacks on businesses have escalated in recent years. Occidental relies on electronic systems and networks to control and manage its oil and gas, chemicals, trading and pipeline operations and has multiple layers of security to mitigate risks of cyber attack. If, however, Occidental were to experience an attack and its security measures failed, the potential consequences to its businesses and the communities in which it operates could be significant. In 2009 and 2010, Occidental experienced a cyber attack on its email system, which had no effect on its operations, financial systems or reputation.

## Other risk factors.

Additional discussion of risks and uncertainties related to price and demand, litigation, environmental matters, oil and gas reserves estimation processes, foreign operations, impairments, derivatives, market risks and internal controls appears under the headings: "MD&A—Oil & Gas Segment—Proved Reserves" and "—Industry Outlook," "—Chemical Segment—Industry Outlook," "—Midstream, Marketing and Other Segment—Industry Outlook," "—Consolidated Results of Operations," "—Lawsuits, Claims and Other Contingencies," "—Environmental Liabilities and Expenditures," "—Foreign Investments," "—Critical Accounting Policies and Estimates," "—Derivative Activities and Market Risk," and "Management's Annual Assessment of and Report on Internal Control Over Financial Reporting."

The risks described in this report are not the only risks facing Occidental and other risks, including risks deemed immaterial, may have material adverse effects.

## ITEM 1B UNRESOLVED STAFF COMMENTS

Occidental has no unresolved SEC staff comments that have been outstanding more than 180 days at December 31, 2012.

## ITEM 3 LEGAL PROCEEDINGS

A subsidiary of OPC reached a settlement in principle in January 2013 with the Louisiana Department of Environmental Quality regarding penalties associated with certain self-disclosed air emissions and permit deviations. Under the proposed settlement, the subsidiary will pay administrative penalties and an additional amount to fund air quality modeling as a supplemental environmental project.

The New Mexico Environment Department asserted a penalty claim on April 6, 2012, against an OPC subsidiary for alleged notification, permitting and emissions violations of the New Mexico Air Quality Control Act at a facility in Lea County, New Mexico. The subsidiary is evaluating this claim.

Although the matters described above are reportable events, their financial impact is expected to be insignificant.

For information regarding other legal proceedings, see the information under the caption, "Lawsuits, Claims and Other Contingencies" in the MD&A section of this report and in Note 9 to the Consolidated Financial Statements.

## ITEM 4 MINE SAFETY DISCLOSURES

Not applicable.



## EXECUTIVE OFFICERS

The current term of employment of each executive officer of Occidental will expire at the May 3, 2013, organizational meeting of the Board of Directors or when a successor is selected. The following table sets forth the executive officers of Occidental:

<table><tr><td>Name</td><td>Age at February 26, 2013</td><td>Positions with Occidental and Subsidiaries and Employment History</td></tr><tr><td>Stephen I. Chazen</td><td>66</td><td>Chief Executive Officer since 2011 and President since 2007; 2010-2011, Chief Operating Officer; 1999-2010, Chief Financial Officer; Director since 2010.</td></tr><tr><td>Dr. Ray R. Irani</td><td>78</td><td>Executive Chairman since 2011; 1990-2011, Chairman and Chief Executive Officer; Director since 1984.</td></tr><tr><td>Cynthia L. Walker</td><td>36</td><td>Executive Vice President and Chief Financial Officer since 2012; Goldman, Sachs &amp; Co.; 2010-2012, Managing Director; 2005-2010, Vice President.</td></tr><tr><td>Donald P. de Brier</td><td>72</td><td>Corporate Executive Vice President and Corporate Secretary since 2012; 1993-2012, Executive Vice President, General Counsel and Secretary.</td></tr><tr><td>William E. Albrecht</td><td>61</td><td>Vice President since 2008; Occidental Oil and Gas Corporation (OOGC): President — Oxy Oil &amp; Gas, Americas since 2011; OOGC: President — Oxy Oil &amp; Gas, USA 2008-2011; 2007-2008, Vice President, California Operations.</td></tr><tr><td>Edward A. &quot;Sandy&quot; Lowe</td><td>61</td><td>Vice President since 2008; OOGC: President — Oxy Oil &amp; Gas, International Production since 2009; 2008-2009, Executive Vice President — Oxy Oil &amp; Gas, International Production and Engineering; 2008, Executive Vice President — Oxy Oil &amp; Gas, Major Projects.</td></tr><tr><td>Willie C.W. Chiang</td><td>52</td><td>Executive Vice President, Operations since 2012; ConocoPhillips: 2011-2012, Senior Vice President, Refining, Marketing, Transportation and Commercial; 2008-2011, Senior Vice President, Refining, Marketing and Transportation.</td></tr><tr><td>James M. Lienert</td><td>60</td><td>Executive Vice President — Business Support since 2012; 2010-2012, Executive Vice President and Chief Financial Officer; 2006-2010, Executive Vice President — Finance and Planning.</td></tr><tr><td>John C. Ale</td><td>58</td><td>Vice President and General Counsel since 2012; Skadden, Arps, Slate, Meagher &amp; Flom LLP: 2002-2012, Partner.</td></tr><tr><td>Roy Pineci</td><td>50</td><td>Vice President, Controller and Principal Accounting Officer since 2008; 2007-2008, Senior Vice President, Finance — Oil and Gas.</td></tr><tr><td>B. Chuck Anderson</td><td>53</td><td>Vice President since 2012; President of Occidental Chemical Corporation since 2006.</td></tr></table>

## Part II

## ITEM 5 MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

## TRADING PRICE RANGE AND DIVIDENDS

This section incorporates by reference the quarterly financial data appearing under the caption "Quarterly Financial Data (Unaudited)" after the Notes to the Consolidated Financial Statements, and the information appearing under the caption "Liquidity and Capital Resources" in the MD&A section of this report. Occidental's common stock was held by approximately 32,200 stockholders of record at December 31, 2012, and by approximately 494,000 additional stockholders whose shares were held for them in street name or nominee accounts. The common stock is listed and traded on the New York Stock Exchange. The quarterly financial data, which are included in this report after the Notes to the Consolidated Financial Statements, set forth the range of trading prices for the common stock as reported on the composite tape of the New York Stock Exchange and quarterly dividend information.

The quarterly dividends declared on the common stock were $0.54 for each quarter of 2012 ($2.16 for the year). On February 14, 2013, a quarterly dividend of $0.64 per share was declared on the common stock, payable on April 15, 2013 to stockholders of record on March 8, 2013. The declaration of future dividends is a business decision made by the Board of Directors from time to time, and will depend on Occidental's financial condition and other factors deemed relevant by the Board.



## SECURITIES AUTHORIZED FOR ISSUANCE UNDER EQUITY COMPENSATION PLANS

All of Occidental's stock-based compensation plans for its employees and non-employee directors have been approved by the stockholders. The aggregate number of shares of Occidental common stock authorized for issuance under such plans is approximately 66 million, of which approximately 15 million had been issued through December 31, 2012. The following is a summary of the securities available for issuance under such plans:

<table><tr><td>a) Number of securities to be issued upon exercise of outstanding options, warrants and rights</td><td>b) Weighted-average exercise price of outstanding options, warrants and rights</td><td>c) Number of securities remaining available for future issuance under equity compensation plans (excluding securities in column (a))</td></tr><tr><td>3,502,857 (1)</td><td>31.88 (2)</td><td>19,251,258 (3)</td></tr></table>

(1) Includes shares reserved to be issued pursuant to stock options (Options), stock appreciation rights (SARs) and performance-based awards. Shares for performance-based awards are included assuming maximum payout, but may be paid out at lesser amounts, or not at all, according to achievement of performance goals.

(2) Price applies only to the Options and SARs included in column (a). Exercise price is not applicable to the other awards included in column (a).

(3) A plan provision requires each share covered by an award (other than Options and SARs) to be counted as if three shares were issued in determining the number of shares that otherwise would have been available for future awards. Accordingly, the number of shares available for future awards may be less than the amount shown depending on the type of award granted. Additionally, under the plan, the amount shown may increase by the number of shares currently unvested or forfeitable, or three times that number as applicable, that (i) fail to vest, (ii) are forfeited or cancelled, or (iii) correspond to the portion of any stock-based awards settled in cash.

## SHARE REPURCHASE ACTIVITIES

Occidental's share repurchase activities for the year ended December 31, 2012, were as follows:

<table><tr><td>Period</td><td>Total Number of Shares Purchased (a)</td><td>Average Price Paid per Share</td><td>Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs</td><td>Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs</td></tr><tr><td>First Quarter 2012</td><td>144,542</td><td>$ 104.84</td><td>—</td><td></td></tr><tr><td>Second Quarter 2012</td><td>1,760,000</td><td>$ 81.19</td><td>1,760,000</td><td></td></tr><tr><td>Third Quarter 2012</td><td>583,072</td><td>$ 86.58</td><td>470,000</td><td></td></tr><tr><td>October 1-31, 2012</td><td>620,000</td><td>$ 80.24</td><td>620,000</td><td></td></tr><tr><td>November 1-30, 2012</td><td>2,860,000</td><td>$ 75.90</td><td>2,860,000</td><td></td></tr><tr><td>December 1-31, 2012</td><td>1,520,000</td><td>$ 74.92</td><td>1,520,000</td><td></td></tr><tr><td>Fourth Quarter 2012</td><td>5,000,000</td><td>$ 76.14</td><td>5,000,000</td><td></td></tr><tr><td>Total 2012</td><td>7,487,614</td><td>$ 78.69</td><td>7,230,000</td><td>17,255,575 (b)</td></tr></table>

(a) Includes shares purchased from the trustee of Occidental's defined contribution savings plan that are not part of publicly announced plans or programs.

(b) Occidental has had a 95 million share repurchase program authorized since 2008; however, the program does not obligate Occidental to acquire any specific number of shares and may be discontinued at any time.



## PERFORMANCE GRAPH

The following graph compares the yearly percentage change in Occidental's cumulative total return on its common stock with the cumulative total return of the Standard & Poor's 500 Stock Index (S&P 500) and with that of Occidental's peer group over the five-year period ended on December 31, 2012. The graph assumes that $100 was invested at the beginning of the five-year period shown in the graph below in (i) Occidental common stock, (ii) the stock of the companies in the S&P 500 and (iii) each of the peer group companies' common stock weighted by their relative market values within the peer group, and that all dividends were reinvested.

Occidental's peer group consists of Anadarko Petroleum Corporation, Apache Corporation, Canadian Natural Resources Limited, Chevron Corporation, ConocoPhillips, Devon Energy Corporation, EOG Resources Inc., ExxonMobil Corporation, Hess Corporation, Royal Dutch Shell plc, Total S.A. and Occidental.



The information provided in this Performance Graph shall not be deemed "soliciting material" or "filed" with the Securities and Exchange Commission or subject to Regulation 14A or 14C under the Exchange Act, other than as provided in Item 201 to Regulation S-K under the Exchange Act, or subject to the liabilities of Section 18 of the Exchange Act and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act except to the extent Occidental specifically requests that it be treated as soliciting material or specifically incorporates it by reference.

(1) The cumulative total return of the peer group companies' common stock includes the cumulative total return of Occidental's common stock.



## ITEM 6 SELECTED FINANCIAL DATA

## FIVE-YEAR SUMMARY OF SELECTED FINANCIAL DATA

Dollar amounts in millions, except per-share amounts

<table><tr><td>As of and for the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>RESULTS OF OPERATIONS (a)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net sales</td><td>$ 24,172</td><td>$ 23,939</td><td>$ 19,045</td><td>$ 14,814</td><td>$ 23,713</td></tr><tr><td>Income from continuing operations (b)</td><td>$ 4,635</td><td>$ 6,640</td><td>$ 4,569</td><td>$ 3,151</td><td>$ 7,183</td></tr><tr><td>Net income attributable to common stock</td><td>$ 4,598</td><td>$ 6,771</td><td>$ 4,530</td><td>$ 2,915</td><td>$ 6,857</td></tr><tr><td>Basic earnings per common share from continuing operations (b)</td><td>$ 5.72</td><td>$ 8.16</td><td>$ 5.62</td><td>$ 3.88</td><td>$ 8.77</td></tr><tr><td>Basic earnings per common share (b)</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.57</td><td>$ 3.59</td><td>$ 8.37</td></tr><tr><td>Diluted earnings per common share (b)</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.56</td><td>$ 3.58</td><td>$ 8.34</td></tr><tr><td>FINANCIAL POSITION (a)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total assets</td><td>$ 64,210</td><td>$ 60,044</td><td>$ 52,432</td><td>$ 44,229</td><td>$ 41,537</td></tr><tr><td>Long-term debt, net</td><td>$ 7,023</td><td>$ 5,871</td><td>$ 5,111</td><td>$ 2,557</td><td>$ 2,049</td></tr><tr><td>Stockholders&#x27; equity</td><td>$ 40,048</td><td>$ 37,620</td><td>$ 32,484</td><td>$ 29,159</td><td>$ 27,325</td></tr><tr><td>MARKET CAPITALIZATION (c)</td><td>$ 61,710</td><td>$ 75,992</td><td>$ 79,735</td><td>$ 66,050</td><td>$ 48,607</td></tr><tr><td>CASH FLOW</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Operating:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash provided by operating activities</td><td>$ 11,312</td><td>$ 12,281</td><td>$ 9,566</td><td>$ 5,946</td><td>$ 10,765</td></tr><tr><td>Investing:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Capital expenditures</td><td>$ (10,226)</td><td>$ (7,518)</td><td>$ (3,940)</td><td>$ (3,245)</td><td>$ (4,126)</td></tr><tr><td>Cash used by all other investing activities, net</td><td>$ (2,429)</td><td>$ (2,385) (d)</td><td>$ (5,355)</td><td>$ (2,221)</td><td>$ (5,314)</td></tr><tr><td>Financing:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash dividends paid</td><td>$ (2,128) (e)</td><td>$ (1,436)</td><td>$ (1,159)</td><td>$ (1,063)</td><td>$ (940)</td></tr><tr><td>Cash provided (used) by all other financing activities, net</td><td>$ 1,282</td><td>$ 261</td><td>$ 2,242</td><td>$ 30</td><td>$ (570)</td></tr><tr><td>DIVIDENDS PER COMMON SHARE</td><td>$ 2.16</td><td>$ 1.84</td><td>$ 1.47</td><td>$ 1.31</td><td>$ 1.21</td></tr><tr><td>WEIGHTED AVERAGE BASIC SHARES OUTSTANDING (thousands)</td><td>809,345</td><td>812,075</td><td>812,472</td><td>811,305</td><td>817,635</td></tr></table>

Note: Argentine operations were sold in February 2011 and have been reflected as discontinued operations for all applicable periods.

(a) See the MD&A section of this report and the Notes to Consolidated Financial Statements for information regarding acquisitions and dispositions, discontinued operations and other items affecting comparability.

(b) Represent amounts attributable to common stock after deducting noncontrolling interest amounts of $72 million in 2010, $51 million in 2009 and $116 million in 2008. There were no noncontrolling interests in 2012 and 2011.

(c) Market capitalization is calculated by multiplying the year-end total shares of common stock outstanding, net of shares held as treasury stock, by the year-end closing stock price.

(d) Includes $2.6 billion of cash received from the sale of the Argentine operations.

(e) Includes the accelerated fourth quarter 2012 dividend payment, which normally would have been accrued as of year end but paid in the first quarter of the following year.

## ITEM 7 AND 7A

## MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (MD&A)

In this report, "Occidental" means Occidental Petroleum Corporation (OPC), or OPC and one or more entities in which it owns a controlling interest (subsidiaries). Occidental's principal businesses consist of three segments operated by OPC's subsidiaries and affiliates. The oil and gas segment explores for, develops and produces oil and condensate, natural gas liquids (NGLs) and natural gas. The chemical segment (OxyChem) mainly manufactures and markets basic chemicals and vinyls. The midstream, marketing and other segment (midstream and marketing) gathers, processes, transports, stores, purchases and markets oil, condensate, NGLs, natural gas, carbon dioxide ( \( CO_{2} \) ) and power. It also trades around its assets, including transportation and storage capacity, and trades oil, NGLs, gas and other commodities. The segment also invests in entities that conduct similar activities.



## STRATEGY

## General

Occidental aims to maximize total returns to stockholders using the following strategies:

Grow oil and gas production through development programs focused on large, long-lived conventional and unconventional oil and gas assets with long-term growth potential, and acquisitions;

Allocate and deploy capital with a focus on achieving returns well in excess of Occidental's cost-of-capital;

Provide consistent dividend growth; and

Maintain financial discipline and a strong balance sheet.

In conducting its business, Occidental accepts commodity, engineering and limited exploration risks. Occidental seeks to limit its financial and political risks.

Occidental prioritizes the use of its cash flows in the following order:

Maintenance capital

Dividends

Growth capital

Acquisitions

Share repurchases

Capital is employed to operate all assets in a safe and environmentally sound manner. Management aims to develop Occidental's assets in a manner that they would contribute substantially to earnings and cash flow after invested capital. The following describes the application of Occidental's overall strategy to each of its operating segments.

## Oil and Gas



Occidental prefers to hold large, long-lived "legacy" oil and gas assets, like those in California and the Permian Basin, that tend to have enhanced secondary and tertiary recovery opportunities and economies of scale that lead to cost-effective production. Occidental also focuses a portion of its drilling activities on unconventional shale opportunities.

The oil and gas business seeks to increase its oil and gas production profitably and add new reserves at a pace ahead of production while minimizing costs incurred for finding and development of such reserves. The oil and gas business implements this strategy within the limits of the overall corporate strategy primarily by:

Deploying capital to fully develop areas where reserves are known to exist and increase production from mature fields by applying appropriate technology and advanced reservoir-management practices;

➢ Adding reserves through a combination of focused exploration and development programs conducted in Occidental's core areas, which are the United States, the Middle East/North Africa and Latin America; and

Maintaining a disciplined approach to acquisitions and divestitures with an emphasis on transactions at attractive prices.

Over the past several years, Occidental has strengthened its asset base within its core areas. Occidental has invested in, and disposed of, assets with the goal of raising the average performance and potential of its assets.

In 2012, Occidental paid approximately $2.3 billion for domestic oil and gas properties in the Permian Basin, the Williston Basin, California and South Texas.

Management currently believes Occidental's growth will be most strongly affected by the success of the development plans for its Permian, California and Oman assets and the Al Hosn gas project in Abu Dhabi where it continues to deploy significant capital. Occidental's oil and gas production has grown approximately five percent annually during the three-year period ended December 31, 2012.

## Chemical



The primary objective of the chemical business is to generate cash flow in excess of its normal capital expenditure requirements and achieve above-cost-of-capital returns. The chemical segment's (OxyChem) strategy is to be a low-cost producer in order to maximize its cash flow generation. OxyChem concentrates on the chlorovinyls chain beginning with chlorine, which is co-produced with caustic soda, and markets both to third parties. In addition, chlorine, together with ethylene, is converted through a series of intermediate products into PVC. OxyChem's focus on chlorovinyls allows it to maximize the benefits of integration and take advantage of



economies of scale. Capital is employed to sustain production capacity and to focus on projects and developments designed to improve the competitiveness of segment assets. Acquisitions and plant development opportunities may be pursued when they are expected to enhance the existing core chlor-alkali and PVC businesses or take advantage of other specific opportunities. During 2012, OxyChem began construction of a chlor-alkali plant in Tennessee, which it expects to begin operating in the fourth quarter of 2013.

## Midstream and Marketing



The midstream and marketing segment is managed to generate returns on capital employed in excess of Occidental's cost of capital. In order to generate these returns, the segment evaluates opportunities across the value chain and uses its assets to provide services to other segments and third parties. In marketing its own and third-party production, Occidental strives to maximize realized value using its assets, including transportation and storage capacity. In commodities trading, Occidental seeks to generate gains using net-long positions. The segment invests in and operates gas plants, co-generation facilities, pipeline systems and storage facilities. The segment also seeks to minimize the costs of gas, power and other commodities used in Occidental's businesses and to limit credit risk exposure. Capital is employed to sustain or, where appropriate, increase operational capacity and to improve the competitiveness of Occidental's assets. Occidental and Magellan Midstream Partners, L.P. are proceeding with the construction of the BridgeTex Pipeline which will transport crude oil between the Permian region and the Gulf Coast refinery markets and is expected to begin service in mid-2014.

## Key Performance Indicators
General

Occidental seeks to meet its strategic goals by continually measuring its success in its key performance metrics that drive total stockholder return. In addition to production growth and capital allocation and deployment discussed above, Occidental believes the following are its most significant metrics:

➢ Cash margin per barrel;

➢ Free-cash-flow yield;

Dividend growth;

Return on equity (ROE) and return on capital employed (ROCE).

Occidental also monitors other segment-specific indicators such as per-unit profit, production costs and finding and development costs, as well as health, environmental and safety measures, like the number of recordable injuries, and others.

Based on the $2.56 per share annual dividend rate announced in February 2013, Occidental’s dividend rate has increased by 412 percent since 2002. While its stockholders’ equity increased by 6 percent for 2012 and 37 percent for the three-year period from 2010 through 2012, Occidental continued to deliver above-cost-of-capital returns as follows:

<table><tr><td></td><td>Annual 2012 (a)</td><td>Three-Year Annual Average 2010 - 2012 (b)</td></tr><tr><td>ROE</td><td>14.6% (11.8%)</td><td>15.2%</td></tr><tr><td>ROCE</td><td>12.6% (10.3%)</td><td>13.5%</td></tr></table>

(a) The top figures for ROE and ROCE for 2012 were calculated by dividing Occidental's 2012 income after removing the effect of Significant Items Affecting Earnings described on page 24 (while adding back after-tax interest expense for the ROCE calculation) by its average equity and capital employed, respectively, during 2012. We provide this adjusted measure because we believe it would be useful to investors in evaluating and comparing Occidental's performance between periods, not as a substitute for the measure calculated using net income. The bottom figure is the same calculation but using net income attributable to common stock in the numerator (while adding back after-tax interest expense for the ROCE calculation).

(b) The three-year average ROE and ROCE were calculated by dividing Occidental's average net income attributable to common stock (while adding back after-tax interest expense for the ROCE calculation) over the three-year period 2010-2012 by its average equity and capital employed, respectively, over the same period.

## Debt Structure

Occidental issued $1.75 billion of senior unsecured notes in the second quarter of 2012 for general corporate purposes including ordinary course working capital increases, acquisitions, stock repurchases, retirement of debt and other business opportunities. As a result of Occidental’s commitment to financial discipline, its year-end 2012 total debt-to-capitalization (debt and equity) ratio was 16 percent.

## OIL AND GAS SEGMENT

## Business Environment

Oil and gas prices are the major variables that drive the industry’s short- and intermediate-term financial performance. The following table presents the average daily West Texas Intermediate (WTI), Brent and New York Mercantile Exchange (NYMEX) prices for 2012 and 2011:

<table><tr><td></td><td>2012</td><td>2011</td></tr><tr><td>WTI oil ($/barrel)</td><td>$ 94.21</td><td>$ 95.12</td></tr><tr><td>Brent oil ($/barrel)</td><td>$ 111.70</td><td>$ 110.90</td></tr><tr><td>NYMEX gas ($/Mcf)</td><td>$ 2.81</td><td>$ 4.11</td></tr></table>



The following table presents Occidental's average realized prices as a percentage of WTI, Brent and NYMEX for 2012 and 2011:

<table><tr><td></td><td>2012</td><td>2011</td></tr><tr><td>Worldwide oil as a percentage of average WTI</td><td>106%</td><td>103%</td></tr><tr><td>Worldwide oil as a percentage of average Brent</td><td>89%</td><td>88%</td></tr><tr><td>Worldwide NGLs as a percentage of average WTI</td><td>48%</td><td>58%</td></tr><tr><td>Domestic natural gas as a percentage of NYMEX</td><td>93%</td><td>99%</td></tr></table>

Average realized oil prices were slightly higher in 2012 than 2011. Approximately 60 percent of Occidental's oil production tracks world oil prices, such as Brent, and 40 percent tracks WTI. The average realized domestic natural gas price in 2012 decreased 35 percent from 2011.

Prices and differentials can vary significantly, even on a short-term basis, making it impossible to predict realized prices with a reliable degree of certainty.

## Operations

## Domestic Interests

Occidental conducts its domestic operations through land leases, subsurface mineral rights it owns or a combination of both surface land and subsurface mineral rights it owns. Occidental's domestic oil and gas leases have a primary term ranging from one to ten years, which is extended through the end of production once production commences. Of the total 8.1 million net acres in which Occidental has interests, approximately 74 percent is leased, 25 percent is owned subsurface mineral rights and 1 percent is owned land with mineral rights.

## Production-Sharing Contracts (PSC)

Occidental has interests that are operated under PSCs or similar contracts in Bahrain, Iraq, Libya, Oman, Qatar and Yemen. Under such contracts, Occidental records a share of production and reserves to recover certain production costs and an additional share for profit. In addition, Occidental's share of production and reserves from operations in Long Beach, California, and certain contracts in Colombia are subject to contractual arrangements similar to a PSC. These contracts do not transfer any right of ownership to Occidental and reserves reported from these arrangements are based on Occidental's economic interest as defined in the contracts. Occidental's share of production and reserves from these contracts decreases when product prices rise and increases when prices decline. Overall, Occidental's net economic benefit from these contracts is greater when product prices are higher.

## Business Review

The following chart shows Occidental’s total volumes for the last five years:



Notes:

• Includes average production volumes per day of 5 thousand barrels (mbbl), 6 mbbl and 6 mbbl for 2010, 2009 and 2008, respectively, related to the noncontrolling interest in a Colombian subsidiary.

• Excludes volumes from the Argentine operations sold in February 2011 and classified as discontinued operations.

## United States Assets



United States

1. Permian

2. California

3. Midcontinent and Other interests

## Permian

Occidental's Permian production is diversified across a large number of producing areas in the Permian Basin. The Permian Basin extends throughout southwest Texas and southeast New Mexico and is one of the largest and most active oil basins in the United States, accounting for approximately 15 percent of the total United States oil production.

Occidental is the largest producer of oil in the Permian Basin with an approximate 16 percent net share of the total oil production. Occidental also produces and processes natural gas and NGLs in the Permian Basin. Occidental continued to increase its Permian interests in 2012 through various acquisitions, a significant portion of which related to its non- \( CO_{2} \)  operations which comprised approximately 1.5 million net acres at the end of 2012.



Approximately 60 percent of Occidental's Permian oil production is from fields that actively employ  \( CO_{2} \)  flood technology, an enhanced oil recovery (EOR) technique. This technique involves injecting  \( CO_{2} \)  into oil reservoirs where it causes the oil to flow more freely into producing wells. These  \( CO_{2} \)  flood operations make Occidental a world leader in the application of this technology.

Occidental’s interests in Permian offer significant additional development and exploitation potential. During 2012, Occidental drilled approximately 550 wells on its operated properties and participated in additional wells drilled on third-party-operated properties. Occidental also focused on improving the performance of existing wells.

Occidental’s Permian non- \( CO_{2} \)  operations are among its fastest growing assets. Since beginning significant delineation and development efforts in 2010, production from these operations has increased by more than 25 percent. The development program continued to increase in 2012 accounting for more than 300 of the wells drilled in Permian.

Occidental’s share of production in Permian was approximately 207,000 BOE per day in 2012.

## California

Occidental's California operations include interests in the Elk Hills area, the Wilmington and other fields in the Los Angeles Basin and the Ventura, San Joaquin and Sacramento Basins. Occidental has properties in more than 125 fields in California, an increase from 2011 resulting from various property acquisitions in 2012.

Occidental’s interests in the Elk Hills area include the Elk Hills oil and gas field in the southern portion of California’s San Joaquin Valley, which it operates with an approximate 78-percent interest, along with other adjacent properties. The Elk Hills Field is the largest producer of gas and NGLs in California. During 2012, Occidental continued to invest in the Elk Hills area, performing infill drilling, field extensions and recompletions identified by advanced reservoir characterization techniques, resulting in approximately 320 new wells being drilled.

Occidental began operating a new gas processing plant in Elk Hills in 2012 with capacity to handle 200 million cubic feet per day.

Occidental’s share of production in California was approximately 148,000 BOE per day in 2012.

Occidental holds approximately 2.1 million net acres in California, the large majority of which are net fee mineral interests. As a result, Occidental has a substantial inventory of properties available for future development and exploitation in conventional areas, as well as unconventional prospects, such as shale. Occidental drilled approximately 760 wells in California during 2012.

## Midcontinent and Other

The Midcontinent and Other properties include interests in the Hugoton Field, the Piceance Basin, the Williston Basin, the Marcellus Shale in the Appalachian Basin, the Eagle Ford Shale and other areas in South Texas. These properties are located in Kansas, Oklahoma, Colorado, North Dakota, West Virginia and Texas. Occidental holds over 2.3 million net acres in the Midcontinent region, which includes 1.4 million net acres in a large concentration of gas reserves and production and royalty interests in the Hugoton area and approximately 0.4 million net acres in the Piceance area. Occidental also holds approximately 160,000 net acres in South Texas, including 4,000 net acres in the Eagle Ford Shale, which was acquired in 2012. In addition, Occidental holds approximately 341,000 net acres of oil producing and prospective unconventional properties in the Williston Basin's Bakken and Three Forks formations. In addition, Occidental holds approximately 235,000 net acres in West Virginia.

In Midcontinent and Other, Occidental drilled approximately 260 wells and produced approximately 110,000 BOE per day in 2012.

## Other Developments

Management conducted a review of Occidental’s portfolio of oil and gas assets in the fourth quarter of 2012 and concluded that, given the current and anticipated natural gas pricing environment and the effect of reserve revisions from price changes and well performance, certain of its domestic natural gas producing properties had become impaired. Occidental also concluded that certain projects had become uneconomical and that it would not pursue them. As a result, Occidental recorded pre-tax impairment charges of $1.7 billion, almost all of which were for certain assets in Midcontinent, over 90 percent of which were related to natural gas properties that were acquired more than four years ago on average when gas prices were more than $6 per Mcf.

## Middle East/North Africa Assets



Middle East/North Africa

1. Bahrain

2. Iraq

3. Libya

4. Oman

5. Qatar

6. United Arab Emirates

7. Yemen



## Bahrain

In 2009, Occidental and other consortium members began operating the Bahrain Field under a 20-year development and production sharing agreement (DPSA). Occidental has a 48-percent working interest in the joint venture. Since handover of operations, the consortium has increased gross gas production capacity more than 60 percent from an initial level of 1.5 billion cubic feet per day to over 2.4 billion cubic feet per day and increased gross oil production from 26,000 barrels per day to 42,000 barrels per day. The consortium plans to continue growing gross gas production capacity to over 2.7 billion cubic feet per day and gross oil production to over 75,000 barrels per day. Occidental's share of production from Bahrain during 2012 was approximately 232 million cubic feet (MMcf) per day of gas and 4,000 barrels of oil per day.

## Iraq

In 2010, Occidental and other consortium members signed a 20-year contract with the South Oil Company of Iraq to develop the Zubair Field. Occidental has a 23.44-percent interest in this contract, which entitles Occidental to receive oil for cost recovery and a remuneration fee, as a result of having achieved an initial gross production threshold in 2010. The consortium plans to increase production to a contractually targeted production level of 1.2 million BOE per day by 2016 and maintain this level of production for seven years. Occidental's share of production from Iraq was approximately 11,000 BOE per day in 2012.

## Libya

Occidental participates with subsidiaries of the Libyan National Oil Company in Sinte Basin producing operations. These agreements continue through 2032. The 2012 production volume was approximately 12,000 BOE per day.

## Oman

In Oman, Occidental is the operator of Block 9 and Block 27, with a 65-percent working interest in each block; Block 53, with a 45-percent working interest; and Block 62, with a 48-percent working interest.

A 30-year PSC for the Mukhaizna Field (Block 53) was signed with the Government of Oman in 2005, pursuant to which Occidental assumed operation of the field. By the end of 2012, Occidental had drilled almost 1,800 new wells and continued implementation of a major steamflood project. In 2012, the average gross daily production was 120,000 BOE per day, which was over 15 times higher than the production rate in September 2005.

The term for Block 9 continues through 2015, with a 10-year extension right for certain areas. The term for Block 27 expires in 2035.

In 2008, Occidental was awarded a 20-year contract for Block 62, subject to declaration of commerciality, where it is pursuing development and exploration opportunities targeting gas and condensate resources.

Occidental's share of production from Oman was approximately 76,000 BOE per day in 2012.

## Qatar

In Qatar, Occidental is the operator at Idd El Sharqi North Dome (ISND) and Idd El Sharqi South Dome (ISSD), with a 100-percent working interest in each, and Al Rayyan (Block 12), with a 92.5-percent working interest. The terms for ISND, ISSD and Block 12 expire in 2019, 2022 and 2017, respectively.

In 2011, Occidental received approval from the Government of Qatar for the fourth phase of field development of the ISND Field, focusing on continued development of mature reservoirs while further delineating and developing less mature reservoirs. Occidental also received approval for field development plans for ISSD and Al Rayyan, which include additional drilling through 2013.

Occidental's Dolphin investment comprises two separate economic interests through which Occidental owns: (i) a 24.5-percent undivided interest in the upstream operations under a DPSA with the Government of Qatar to develop and produce natural gas and NGLs in Qatar's North Field through mid-2032, with a provision to request a five-year extension; and (ii) a 24.5-percent interest in the stock of Dolphin Energy Limited (Dolphin Energy), which is discussed further in "Midstream, Marketing and Other Segment – Pipeline Transportation."

Occidental’s share of production from Qatar was approximately 114,000 BOE per day in 2012.

## United Arab Emirates

In the first quarter of 2011, Occidental acquired a 40-percent participating interest in the Al Hosn gas project, joining with the Abu Dhabi National Oil Company (ADNOC) in a 30-year joint venture agreement. The project is anticipated to produce over 500 MMcf per day of natural gas, of which Occidental's net share would be over 200 MMcf per day. In addition, the project is expected to produce over 50,000 barrels per day of NGLs and condensates, of which Occidental's net share would be over 20,000 barrels per day. Occidental's 2012 capital expenditures for this project were approximately $1.2 billion. A substantial portion of the total expenditures to date has been incurred in connection with plants and facilities and is included in the midstream and marketing segment. As the development progresses, higher portions of the capital expenditures will be spent to drill wells, which will be reflected in the oil and gas segment. Occidental believes that its share of total 2013 capital for the project will be approximately $1.1 billion.

Occidental conducts a majority of its Middle East business development activities through its office in Abu Dhabi, which also provides various support functions for Occidental's Middle East/North Africa oil and gas operations.

## Yemen

In Yemen, Occidental owns interests in: Block 10 East Shabwa Field, which extends through 2015 with a 40.4-percent interest that includes an 11.8-percent interest held in an unconsolidated entity, and Block S-1 An Nagyah Field, which is an Occidental-operated block with a 75-percent working interest that extends into 2023.



Occidental's share of production from the Yemen properties was approximately 14,000 BOE per day in 2012.

## Latin America Assets



## Bolivia

Occidental holds working interests in the Tarija, Chuquisaca and Santa Cruz regions of Bolivia, which produce gas.

## Colombia

Occidental has a working interest in the La Cira-Infantas area and has operations within the Llanos Norte Basin. Occidental's interests range from 39 to 61 percent and certain interests expire between 2023 and 2030, while others extend through the economic limit of the areas. Occidental's share of production was approximately 29,000 BOE per day in 2012.

## Proved Reserves

Proved oil, NGL and gas reserves were estimated using the unweighted arithmetic average of the first-day-of-the-month price for each month within the year, unless prices were defined by contractual arrangements. Oil, NGL and gas prices used for this purpose were based on posted benchmark prices and adjusted for price differentials including gravity, quality and transportation costs. For the 2012, 2011 and 2010 disclosures, the calculated average West Texas Intermediate oil prices were $94.71, $96.19 and $79.43 per barrel, respectively. The calculated average Henry Hub gas prices for 2012, 2011 and 2010 disclosures were $2.79, $4.04 and $4.39 per MMBtu, respectively.

Occidental had proved reserves at year-end 2012 of 3,296 million BOE, as compared with the year-end 2011 amount of 3,176 million BOE. Proved reserves at year-end 2012 and 2011 consisted of, respectively, 62 percent and 63 percent oil, 10 percent and 9 percent NGLs and 28 percent and 28 percent natural gas. Proved developed reserves represented approximately 73 percent and 76 percent, respectively, of Occidental's total proved reserves at year-end 2012 and 2011.
Occidental does not have any reserves from non-traditional sources. For further information regarding Occidental's proved reserves, see "Supplemental Oil and Gas Information" following the "Financial Statements."

## Proved Reserve Additions

Occidental’s total proved reserve additions from all sources were 400 million BOE in 2012. The total additions were as follows:

<table><tr><td colspan="2">In millions of BOE</td></tr><tr><td>Improved recovery</td><td>257</td></tr><tr><td>Extensions and discoveries</td><td>232</td></tr><tr><td>Purchases</td><td>94</td></tr><tr><td>Revisions of previous estimates</td><td>(183)</td></tr><tr><td>Total additions</td><td>400</td></tr></table>

Occidental’s ability to add reserves, other than through purchases, depends on the success of improved recovery, extension and discovery projects, each of which depends on reservoir characteristics, technology improvements and oil and natural gas prices, as well as capital and operating costs. Many of these factors are outside of management’s control, and will affect whether these historical sources of proved reserve additions continue at similar levels.

## Improved Recovery

In 2012, Occidental added proved reserves of 257 million BOE from improved recovery through its EOR and infill drilling activities. Generally, the improved recovery additions in 2012 were associated with the continued development of properties in California, Permian, South Texas and Oman. These properties comprise both conventional projects, which are characterized by the deployment of EOR development methods, largely employing application of waterflood, steamflood or  \( CO_{2} \)  injection, and unconventional projects. These types of conventional EOR development methods are often applied through existing wells, though additional drilling may be required to fully optimize the development configuration. Waterflooding is the technique of injecting water into the formation to displace the oil to the offsetting oil production wells. Steamflooding is the technique of injecting steam into the formation to lower oil viscosity so that it flows more freely into producing wells. This process is applied in areas where the oil is too viscous to be effectively moved with water.  \( CO_{2} \)  flooding involves injecting  \( CO_{2} \)  into oil reservoirs where it causes the oil to flow more freely into producing wells. Many of Occidental's projects, including unconventional projects, rely on improving permeability to increase flow in the wells. In addition, some improved recovery comes from drilling infill wells that allow recovery of reserves that would not be recoverable from existing wells.

## Extensions and Discoveries

Occidental also obtained reserve additions from extensions and discoveries, which are dependent on successful exploration and exploitation programs. In 2012, extensions and discoveries added 232 million BOE, a substantial majority of which is attributable to the



recognition of initial proved undeveloped reserves from the Al Hosn gas project.

## Purchases and Divestitures of Proved Reserves

Occidental continues to add reserves through acquisitions when properties are available at prices it deems reasonable. As market conditions change, the available supply of properties may increase or decrease accordingly. In 2012, Occidental added 94 million BOE through purchases of proved reserves largely consisting of several domestic acquisitions in the Permian Basin, California, Williston Basin and South Texas.

## Revisions of Previous Estimates

Revisions can include upward or downward changes to previous proved reserve estimates for existing fields due to the evaluation or interpretation of geologic, production decline or operating performance data. In addition, product price changes affect proved reserves recorded by Occidental. For example, higher prices may increase the economically recoverable reserves, particularly for domestic properties, because the extra margin extends the expected life of the operations. Offsetting this effect, higher prices decrease Occidental's share of proved reserves under PSCs because less oil is required to recover costs. Conversely, when prices drop, Occidental's share of proved reserves increases for PSCs and economically recoverable reserves may drop for other operations. In 2012, revisions of previous estimates provided a net 183 million BOE reduction to proved reserves.

In 2012, revisions related to price for the company as a whole were negative. A substantial majority of such revisions related to Occidental's domestic gas reserves and resulted from lower domestic gas prices. These lower prices and the resulting changes in Occidental's plans for drilling on gas properties constituted a majority of its total revisions. To the extent gas prices recover in the future, a portion of these reserves will be reinstated. If natural gas prices decrease further for an extended period, domestic gas reserves could experience additional negative price revisions.

Other negative revisions were mainly due to reservoir performances in Elk Hills and Midcontinent and Other. The revisions involved several properties where wells experienced higher-than-expected decline rates. Sizable portions of these revisions were transferred from the proved category to probable, possible and contingent categories.

Reserve estimation rules require that estimated ultimate recoveries be much more likely to increase or remain constant than to decrease as changes are made due to increased availability of technical data. As a result, apart from the effect of product prices, it is generally more likely that future proved reserve revisions will be positive in aggregate over time rather than negative.

## Proved Undeveloped Reserves

In 2012, Occidental had proved undeveloped reserve additions of 443 million BOE from improved recovery, extensions and discoveries and purchases. Of the total additions, 171 million BOE represented additions from improved recovery, primarily in California, Permian, South Texas and Oman. Occidental added 46 million BOE through purchases of proved undeveloped reserves domestically in the Permian and Williston Basins and California. Additionally, the proved undeveloped reserves increased due to extensions and discoveries mainly from the Al Hosn gas project. These proved undeveloped reserve additions were offset by transfers of 229 million BOE to the proved developed category as a result of the 2012 development programs and by revisions of 98 million BOE, which is included in total revisions discussed above. These revisions were in the same locations as those discussed above and factors that caused them were substantially the same as those that caused the changes to total proved reserves. Occidental incurred approximately $3.4 billion in 2012 to convert proved undeveloped reserves to proved developed reserves. Permian, Bahrain, California, Oman and Williston accounted for approximately 86 percent of the reserves transfers from proved undeveloped to proved developed in 2012. Costs to develop proved undeveloped reserves have increased over time and may continue to increase.

## Reserves Evaluation and Review Process

Occidental’s estimates of proved reserves and associated future net cash flows as of December 31, 2012, were made by Occidental’s technical personnel and are the responsibility of management. The estimation of proved reserves is based on the requirement of reasonable certainty of economic productivity and funding commitments by Occidental to develop the reserves. This process involves reservoir engineers, geoscientists, planning engineers and financial analysts. As part of the proved reserves estimation process, all reserves volumes are estimated by a forecast of production rates, operating costs and capital expenditures. Price differentials between benchmark prices (the unweighted arithmetic average of the first-day-of-the-month price for each month within the year) and realized prices and specifics of each operating agreement are then used to estimate the net reserves. Production rate forecasts are derived by a number of methods, including estimates from decline curve analysis, type-curve analysis, material balance calculations that take into account the volumes of substances replacing the volumes produced and associated reservoir pressure changes, seismic analysis and computer simulation of the reservoir performance. These field-tested technologies have demonstrated reasonably certain results with consistency and repeatability in the formation being evaluated or in an analogous formation. Operating and capital costs are forecast using the current cost environment applied to expectations of future operating and development activities.

Net proved developed reserves are those volumes that are expected to be recovered through existing wells with existing equipment and operating methods for which the incremental cost of any additional required investment is relatively minor. Net proved undeveloped reserves are those volumes that are expected to be recovered from new wells on undrilled acreage, or from existing wells where a relatively major expenditure is required for recompletion.



The current Senior Vice President, Reserves for Oxy Oil and Gas is responsible for overseeing the preparation of reserve estimates, in compliance with SEC rules and regulations, including the internal audit and review of Occidental's oil and gas reserves data. The Senior Vice President has over 30 years of experience in the upstream sector of the exploration and production business, and has held various assignments in North America, Asia and Europe. He is a three-time past Chair of the Society of Petroleum Engineers Oil and Gas Reserves Committee. He is an American Association of Petroleum Geologists (AAPG) Certified Petroleum Geologist and currently serves on the AAPG Committee on Resource Evaluation. He is a member of the Society of Petroleum Evaluation Engineers, the Colorado School of Mines Potential Gas Committee and the UNECE Expert Group on Resource Classification. He is also an active member of the Joint Committee on Reserves Evaluator Training (JCORET). The Senior Vice President has Bachelor of Science and Master of Science degrees in geology from Emory University in Atlanta.

Occidental has a Corporate Reserves Review Committee (Reserves Committee), consisting of senior corporate officers, to review and approve Occidental's oil and gas reserves. The Reserves Committee reports to the Audit Committee of Occidental's Board of Directors during the year. Since 2003, Occidental has retained Ryder Scott Company, L.P. (Ryder Scott), independent petroleum engineering consultants, to review its annual oil and gas reserve estimation processes.

In 2012, Ryder Scott conducted a process review of Occidental's methods and analytical procedures utilized by Occidental's engineering and geological staff for estimating the proved reserves volumes, preparing the economic evaluations and determining the reserves classifications as of December 31, 2012, in accordance with the U.S. Securities and Exchange Commission (SEC) regulatory standards. Ryder Scott reviewed the specific application of such methods and procedures for selected oil and gas properties considered to be a valid representation of Occidental's 2012 year-end total proved reserves portfolio. In 2012, Ryder Scott reviewed approximately 20 percent of Occidental's proved oil and gas reserves. Since being engaged in 2003, Ryder Scott has reviewed the specific application of Occidental's reserve estimation methods and procedures for approximately 70 percent of Occidental's existing proved oil and gas reserves. Management retains Ryder Scott to provide objective third-party input on its methods and procedures and to gather industry information applicable to Occidental's reserve estimation and reporting process. Ryder Scott has not been engaged to render an opinion as to the reasonableness of reserves quantities reported by Occidental. Occidental has filed Ryder Scott's independent report as an exhibit to this Form 10-K.

Based on its reviews, including the data, technical processes and interpretations presented by Occidental, Ryder Scott has concluded that the overall procedures and methodologies Occidental utilized in estimating the proved reserves volumes for the reviewed properties are appropriate for the purpose thereof and comply with current SEC regulations.

## Industry Outlook

The petroleum industry is highly competitive and subject to significant volatility due to numerous current and anticipated market conditions. The WTI and Brent oil price indexes have fluctuated throughout 2012, settling at $91.82 per barrel and $111.11 per barrel as of December 31, 2012.

Oil prices will continue to be affected by (i) global supply and demand, which are generally a function of global economic conditions, inventory levels, production disruptions, technological advances, regional market conditions and the actions of OPEC, other significant producers and governments, (ii) currency exchange rates and (iii) the effect of changes in these variables on market perceptions. These factors make it impossible to predict the future direction of oil prices reliably. Occidental continues to adjust to economic conditions by adjusting capital expenditures in line with current economic conditions with the goal of keeping returns well above its cost of capital.

NGL prices are related to the supply and demand for the components of products making up these liquids. Some of them more typically correlate to the price of oil while others are affected by natural gas prices as well as the demand for certain chemical products for which they are used as feedstock. In addition, infrastructure constraints magnify the pricing volatility from region to region. The volatility in all of these markets makes it impossible to predict NGL prices reliably.

Domestic natural gas prices and local differentials are strongly affected by local supply and demand fundamentals, as well as government regulations and availability of transportation capacity from producing areas. These and other factors can cause prices to be volatile, making it impossible to predict domestic gas prices reliably. International gas prices are generally fixed under long-term contracts.

## CHEMICAL SEGMENT

## Business Environment

Chemical segment earnings decreased in 2012, notably because margins were lower across most product lines as price and volume declines more than offset lower feedstock costs. While the overall United States economy experienced modest growth, the lower margins were primarily due to weaker economic conditions in Europe and Asia, and increased competitive activity from these regions.

## Business Review

## Basic Chemicals

During 2012, United States manufacturing sectors experienced weak growth much of the year, resulting in soft domestic demand and pricing for basic chemical products. Industry chlorine production decreased by approximately 2 percent, compared to 2011. Chlorine prices decreased throughout the year due to lower chlorine demand caused by the slowdown of the Chinese economy and the European debt crisis. Exports of downstream chlorine derivatives into the vinyls chain remained competitive in offshore markets as a result of the North America feedstock cost advantages, which are driven mostly by natural gas prices. Pricing for liquid caustic soda began 2012 generally



soft because the markets anticipated increasing supply due to the improving United States economy. Prices improved in the last two quarters of 2012 as a result of favorable global caustic soda supply and demand balances, resulting in prices finishing slightly above the prior year level. Businesses such as calcium chloride and potassium hydroxide were also negatively impacted by a mild winter and drought conditions in the United States.

During 2012, OxyChem began construction of a 182,500-ton-per-year membrane chlor-alkali plant in Tennessee, which it expects to begin operating in the fourth quarter of 2013.

## Vinyls

Demand in the domestic housing and commercial construction markets increased, resulting in a year-over-year domestic vinyl demand increase of approximately 8 percent in 2012. The higher domestic demand combined with a modest growth in exports contributed to an approximately 4-percent industry-wide increase in domestic operating rates compared to 2011. Industry margins also increased in 2012 due to a combination of higher PVC selling prices and lower ethylene costs. Ethylene costs, which are a significant component of PVC feedstock costs, increased outside North America in 2012 due to the greater dependence on naphtha-based production versus ethane in the United States. North American-produced ethylene continues to be cost-competitive versus prices in Europe and Asia, giving North American vinyl products an advantage in global markets. Industry-wide North American exports of PVC accounted for greater than 35 percent of the total sales of North American producers.

## Industry Outlook

Industry performance will depend on the health of the global economy, specifically in the housing, construction, automotive and durable goods markets. Margins also depend on market supply and demand balances and feedstock and energy prices.

## Basic Chemicals

Occidental expects that if the United States housing, automotive and durable goods markets continue to improve, domestic demand for basic chemical products should be higher in 2013. With improving demand, chlorine and caustic soda margins would be expected to remain at least at 2012 levels. The continued competitiveness of downstream chlorine derivatives in global markets is contingent on United States feedstock costs, primarily natural gas and ethylene, remaining favorable compared to other global markets.

## Vinyls

North American demand and operating rates for vinyls should improve further in 2013 if growth of housing starts and commercial construction continues. Occidental expects export demand to remain firm and industry margins to improve as operating rates increase.

## MIDSTREAM AND MARKETING SEGMENT
Business Environment

Midstream and marketing segment earnings are affected by the performance of its marketing and trading businesses and its processing, transportation and power generation assets. The marketing and trading businesses aggregate and market Occidental's and third-party volumes, trade oil, gas and other commodities and engage in storage activities. Earnings related to processing and transportation are affected by the volumes that are processed at, and transported through, the segment's plants and pipelines, as well as the margins obtained on related services.

The midstream and marketing segment earnings in 2012 were comparable to 2011 and reflected improved marketing and trading performance offset by lower gas processing margins.

## Business Review

## Oil and Gas Marketing and Trading

The marketing and trading group markets substantially all of Occidental’s oil, NGLs and gas production, trades around its assets, including transportation and storage capacity, and engages in commodities trading. Occidental’s third-party marketing and trading activities focus on purchasing oil, NGLs and gas for resale from parties whose oil and gas supply is located near its transportation and storage assets. These purchases allow Occidental to aggregate volumes to improve marketing earnings. In addition, Occidental’s Phibro trading unit’s strategy is to profit from market price changes. Marketing and trading performance is affected primarily by commodity price changes and margins in oil and gas transportation and storage programs. The marketing and trading group’s earnings increased in 2012.

## Gas Processing Plants and CO₂ Fields and Facilities

Occidental processes its and third-party domestic wet gas to extract NGLs and other gas byproducts, including  \( CO_{2} \) , and delivers dry gas to pipelines. Margins primarily result from the difference between inlet costs of wet gas and market prices for NGLs. Occidental’s 2012 earnings from these operations decreased compared to 2011, which reflected lower NGL prices.

Occidental, together with ADNOC, is constructing a gas plant and facilities as part of the Al Hosn gas project in Abu Dhabi, which is expected to be operational in 2014.

## Pipeline Transportation

Margin and cash flow from pipeline transportation operations mainly reflect volumes shipped. Dolphin Energy owns and operates a 230-mile-long, 48-inch-diameter natural gas pipeline (Dolphin Pipeline), which transports dry natural gas from Qatar to the UAE and Oman. The Dolphin Pipeline contributes significantly to Occidental's pipeline transportation results through Occidental's 24.5-percent interest in Dolphin Energy. The Dolphin Pipeline has capacity to transport up to 3.2 Bcf of natural gas per day and currently transports approximately 2.3 Bcf per day. Demand for natural gas in the UAE and Oman has grown and Dolphin Energy's customers have requested additional



gas supplies. To help fulfill this growing demand, Dolphin Energy will continue to pursue an agreement to secure an additional supply of gas from Qatar.

Occidental owns an oil common carrier pipeline and storage system with approximately 2,700 miles of pipelines from southeast New Mexico across the Permian Basin of southwest Texas to Cushing, Oklahoma. The system has a current throughput capacity of about 365,000 barrels per day, 5.8 million barrels of active storage capability and 85 truck unloading facilities at various points along the system, which allow for additional volumes to be delivered into the pipeline.

Occidental owns 35 percent of the general partner of Plains All-American Pipeline, L.P. (Plains Pipeline), a publicly traded oil and gas pipeline transportation, storage, terminalling and marketing entity in the western and southern United States and Canada. The Plains Pipeline contributed over 20 percent of the segment's earnings for 2012.

Occidental and Magellan Midstream Partners, L.P. are proceeding with the construction of the BridgeTex Pipeline, which is expected to begin service in mid-2014. The approximately 450-mile-long pipeline will be capable of transporting approximately 300,000 barrels per day of crude oil between the Permian region (Colorado City, TX) and the Gulf Coast refinery markets. The BridgeTex Pipeline project also includes construction of approximately 2.6 million barrels of oil storage in aggregate.

Occidental’s 2012 pipeline transportation earnings improved due to higher volumes and pricing, and higher income from Plains Pipeline, partially offset by lower earnings from the Dolphin Pipeline.

## Power Generation Facilities

Earnings from power and steam generation facilities are derived from sales to affiliates and third parties and are generally not material.

## Industry Outlook

The pipeline transportation and power generation businesses are expected to remain relatively stable. The gas processing plant operations could have volatile results depending mostly on NGL prices, which cannot be predicted. Generally, higher NGL prices result in higher profitability. Based on its framework of controls and risk management systems, however, Occidental does not expect the volatility of these operations to be significant to the company as a whole. Although the marketing and the trading businesses individually can cause volatility, the operations together tend to offset each other, significantly reducing the overall volatility of the midstream and marketing segment.

## SEGMENT RESULTS OF OPERATIONS

Segment earnings exclude income taxes, interest income, interest expense, environmental remediation expenses, unallocated corporate expenses and discontinued operations, but include gains and losses from dispositions of segment assets and income from the segments' equity investments. Seasonality is not a primary driver of changes in Occidental's consolidated quarterly earnings during the year.

The following table sets forth the sales and earnings of each operating segment and corporate items:

<table><tr><td>In millions, except per share amounts</td><td></td><td></td><td></td></tr><tr><td>For the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>NET SALES (a)</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas</td><td>$ 18,906</td><td>$ 18,419</td><td>$ 14,276</td></tr><tr><td>Chemical</td><td>4,580</td><td>4,815</td><td>4,016</td></tr><tr><td>Midstream and Marketing</td><td>1,399</td><td>1,447</td><td>1,471</td></tr><tr><td>Eliminations (a)</td><td>(713)</td><td>(742)</td><td>(718)</td></tr><tr><td></td><td>$ 24,172</td><td>$ 23,939</td><td>$ 19,045</td></tr><tr><td>EARNINGS</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas (b,c)</td><td>$ 7,095</td><td>$ 10,241</td><td>$ 7,151</td></tr><tr><td>Chemical</td><td>720</td><td>861</td><td>438</td></tr><tr><td>Midstream and Marketing</td><td>439</td><td>448</td><td>472</td></tr><tr><td></td><td>8,254</td><td>11,550</td><td>8,061</td></tr><tr><td>Unallocated corporate items</td><td></td><td></td><td></td></tr><tr><td>Interest expense, net (d)</td><td>(117)</td><td>(284)</td><td>(93)</td></tr><tr><td>Income taxes (e)</td><td>(3,118)</td><td>(4,201)</td><td>(2,995)</td></tr><tr><td>Other</td><td>(384)</td><td>(425)</td><td>(404)</td></tr><tr><td>Income from continuing operations (b)</td><td>4,635</td><td>6,640</td><td>4,569</td></tr><tr><td>Discontinued operations, net (f)</td><td>(37)</td><td>131</td><td>(39)</td></tr><tr><td>Net Income (b)</td><td>$ 4,598</td><td>$ 6,771</td><td>$ 4,530</td></tr><tr><td>Basic Earnings per Common Share</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.57</td></tr></table>

(a) Intersegment sales eliminate upon consolidation and are generally made at prices approximating those that the selling entity would be able to obtain in third-party transactions.

(b) Oil and gas segment earnings, income from continuing operations and net income represent amounts attributable to common stock after deducting a noncontrolling interest amount of $72 million for 2010.

(c) The 2012 amount includes pre-tax charges of $1.7 billion for the impairment of domestic gas assets and related items. The 2011 amount includes pre-tax charges of $35 million related to exploration write-offs in Libya and $29 million related to a Colombian net worth tax, and a pre-tax gain for the sale of an interest in a Colombian pipeline of $22 million. The 2010 amount includes a $275 million pre-tax charge for asset impairments, predominantly of gas properties in the Rocky Mountain region.

(d) The 2011 amount includes a pre-tax charge of $163 million related to the premium on debt extinguishment.

(e) The 2011 amount includes a net $21 million charge for out-of-period state income taxes. The 2010 amount includes an $80 million benefit related to foreign tax credit carryforwards.

(f) The 2011 amount includes a $144 million after-tax gain from the sale of the Argentine operations.



## Oil and Gas

Dollars in millions, except as indicated

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Segment Sales</td><td>$ 18,906</td><td>$ 18,419</td><td>$ 14,276</td></tr><tr><td>Segment Earnings</td><td>$ 7,095</td><td>(a) $ 10,241</td><td>$ 7,151</td></tr></table>

(a) Includes pre-tax charges of $1.7 billion for the impairment of domestic gas assets and related items.

The following tables set forth the production and sales volumes of oil, NGLs and natural gas per day for each of the three years in the period ended December 31, 2012. The differences between the production and sales volumes per day are generally due to the timing of shipments at Occidental's international locations where product is loaded onto tankers.

<table><tr><td>Production per Day</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>United States</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td></td><td></td><td></td></tr><tr><td>California</td><td>88</td><td>80</td><td>76</td></tr><tr><td>Permian</td><td>142</td><td>134</td><td>136</td></tr><tr><td>Midcontinent and Other</td><td>25</td><td>16</td><td>7</td></tr><tr><td>Total</td><td>255</td><td>230</td><td>219</td></tr><tr><td>NGLs (MBBL)</td><td></td><td></td><td></td></tr><tr><td>California</td><td>17</td><td>15</td><td>16</td></tr><tr><td>Permian</td><td>39</td><td>38</td><td>29</td></tr><tr><td>Midcontinent and Other</td><td>17</td><td>16</td><td>7</td></tr><tr><td>Total</td><td>73</td><td>69</td><td>52</td></tr><tr><td>Natural gas (MMCF)</td><td></td><td></td><td></td></tr><tr><td>California</td><td>256</td><td>260</td><td>280</td></tr><tr><td>Permian</td><td>155</td><td>157</td><td>199</td></tr><tr><td>Midcontinent and Other</td><td>410</td><td>365</td><td>198</td></tr><tr><td>Total</td><td>821</td><td>782</td><td>677</td></tr><tr><td>Latin America (a)</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL) - Colombia (b)</td><td>29</td><td>29</td><td>37</td></tr><tr><td>Natural gas (MMCF) - Bolivia</td><td>13</td><td>15</td><td>16</td></tr><tr><td>Middle East/North Africa</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Bahrain</td><td>4</td><td>4</td><td>3</td></tr><tr><td>Dolphin</td><td>8</td><td>9</td><td>11</td></tr><tr><td>Oman</td><td>67</td><td>67</td><td>62</td></tr><tr><td>Qatar</td><td>71</td><td>73</td><td>76</td></tr><tr><td>Other</td><td>36</td><td>38</td><td>46</td></tr><tr><td>Total</td><td>186</td><td>191</td><td>198</td></tr><tr><td>NGLs (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Dolphin</td><td>8</td><td>10</td><td>13</td></tr><tr><td>Other</td><td>1</td><td>—</td><td>1</td></tr><tr><td>Total</td><td>9</td><td>10</td><td>14</td></tr><tr><td>Natural gas (MMCF)</td><td></td><td></td><td></td></tr><tr><td>Bahrain</td><td>232</td><td>173</td><td>169</td></tr><tr><td>Dolphin</td><td>163</td><td>199</td><td>236</td></tr><tr><td>Oman</td><td>57</td><td>54</td><td>48</td></tr><tr><td>Total</td><td>452</td><td>426</td><td>453</td></tr><tr><td>Total Production (MBOE) (a,c)</td><td>766</td><td>733</td><td>711</td></tr></table>

(See footnotes following the Average Sales Price table)

<table><tr><td>Sales Volumes per Day</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>United States</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td>255</td><td>230</td><td>219</td></tr><tr><td>NGLs (MBBL)</td><td>73</td><td>69</td><td>52</td></tr><tr><td>Natural gas (MMCF)</td><td>819</td><td>782</td><td>677</td></tr><tr><td>Latin America (a)</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL) - Colombia (b)</td><td>28</td><td>29</td><td>36</td></tr><tr><td>Natural gas (MMCF) - Bolivia</td><td>13</td><td>15</td><td>16</td></tr><tr><td>Middle East/North Africa</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Bahrain</td><td>4</td><td>4</td><td>3</td></tr><tr><td>Dolphin</td><td>8</td><td>9</td><td>12</td></tr><tr><td>Oman</td><td>66</td><td>69</td><td>61</td></tr><tr><td>Qatar</td><td>71</td><td>73</td><td>76</td></tr><tr><td>Other</td><td>36</td><td>34</td><td>42</td></tr><tr><td>Total</td><td>185</td><td>189</td><td>194</td></tr><tr><td>NGLs (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Dolphin</td><td>8</td><td>10</td><td>12</td></tr><tr><td>Other</td><td>1</td><td>—</td><td>1</td></tr><tr><td>Total</td><td>9</td><td>10</td><td>13</td></tr><tr><td>Natural gas (MMCF)</td><td>452</td><td>426</td><td>453</td></tr><tr><td>Total Sales Volumes (MBOE) (a,c)</td><td>764</td><td>731</td><td>705</td></tr></table>

(See footnotes following the Average Sales Prices table)

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Average Sales Prices</td><td></td><td></td><td></td></tr><tr><td>Oil Prices (\( per bbl)</td><td></td><td></td><td></td></tr><tr><td>United States</td><td>$ 93.72</td><td>$ 92.80</td><td>$ 73.79</td></tr><tr><td>Latin America (a)</td><td>$ 98.35</td><td>$ 97.16</td><td>$ 75.29</td></tr><tr><td>Middle East/North Africa</td><td>$ 108.76</td><td>$ 104.34</td><td>$ 76.67</td></tr><tr><td>Total worldwide (a)</td><td>$ 99.87</td><td>$ 97.92</td><td>$ 75.16</td></tr><tr><td>NGL Prices (\) per bbl)</td><td></td><td></td><td></td></tr><tr><td>United States</td><td>$ 46.07</td><td>$ 59.10</td><td>$ 48.86</td></tr><tr><td>Middle East/North Africa</td><td>$ 37.74</td><td>$ 32.09</td><td>$ 30.64</td></tr><tr><td>Total worldwide</td><td>$ 45.18</td><td>$ 55.53</td><td>$ 45.08</td></tr><tr><td>Gas Prices (\) per Mcf)</td><td></td><td></td><td></td></tr><tr><td>United States</td><td>$ 2.62</td><td>$ 4.06</td><td>$ 4.53</td></tr><tr><td>Latin America (a)</td><td>$ 11.85</td><td>$ 10.11</td><td>$ 7.73</td></tr><tr><td>Total worldwide (a)</td><td>$ 2.06</td><td>$ 3.01</td><td>$ 3.11</td></tr><tr><td>Expensed Exploration</td><td>$ 345</td><td>$ 258</td><td>$ 262</td></tr><tr><td>Capital Expenditures</td><td></td><td></td><td></td></tr><tr><td>Development</td><td>$ 7,554</td><td>$ 5,686</td><td>$ 2,955</td></tr><tr><td>Exploration</td><td>$ 622</td><td>$ 421</td><td>$ 194</td></tr><tr><td>Other</td><td>$ 44</td><td>$ 38</td><td>$ 17</td></tr></table>

(a) For all periods presented, excludes volumes and amounts from the Argentine operations sold in February 2011 and classified as discontinued operations.

(b) Includes production and sales volumes per day of 5 mbbl and 4 mbbl, respectively, for the year ended December 31, 2010, related to the noncontrolling interest in a Colombian subsidiary.

(c) Natural gas volumes have been converted to BOE based on energy content of six Mcf of gas to one barrel of oil.



Oil and gas segment earnings in 2012 were $7.1 billion compared to $10.2 billion in 2011. The decrease reflected asset impairments and related items, lower NGL and natural gas prices, and higher depreciation depletion and amortization (DD&A) rates, maintenance activity and field support costs and exploration expense, partially offset by higher oil prices and domestic volumes.

Average production costs for 2012, excluding taxes other than on income, were $14.99 per BOE, compared to $12.84 per BOE for 2011. The increase reflected higher maintenance activities and field support costs. The fourth quarter of 2012 production costs were $14.95 per barrel, which was $1.04 per barrel lower than the third quarter of 2012 level. These reductions occurred during the course of the fourth quarter, and the 2012 year-end exit rate on a per barrel basis was lower than the fourth quarter 2011 average and well below the fourth quarter 2012 level. These reductions are expected to continue into 2013, reflecting planned improvements in operational efficiencies over many cost categories.

Average daily oil and gas production volumes were 766,000 BOE for 2012, compared to 733,000 BOE for 2011. Occidental's domestic production increased by 9 percent, while total company production increased by 5 percent. Dolphin's full cost recovery of pre-startup capital, which reduced production, was the only operation where PSCs and similar contracts had an appreciable effect on 2012 production volumes. Average daily sales volumes were 764,000 BOE in the twelve months of 2012, compared with 731,000 BOE for the same period in 2011.

Oil and gas segment earnings in 2011 were $10.2 billion compared to $7.2 billion in 2010. The increase reflected higher oil and NGL prices and volumes, partially offset by higher DD&A rates and higher operating costs, including higher field support, workover and well maintenance expenses driven by Occidental's program to increase production at current high oil prices.

Average daily oil and gas production volumes were 733,000 BOE for 2011, compared with 711,000 BOE for 2010. The increase was mainly due to acquisitions in South Texas, California and the Williston Basin and higher production in Oman's Mukhaizna Field and Iraq, which were partially offset by lower production in Libya. Production was negatively impacted in the Middle East/North Africa, Colombia and Long Beach by higher year-over-year average oil prices affecting PSCs by 18,000 BOE per day. Average daily sales volumes were 731,000 BOE in the twelve months of 2011, compared with 705,000 BOE for 2010.

Oil and gas segment earnings in 2012 included pretax charges of $1.7 billion for the impairment of domestic gas assets and related items.
Oil and gas segment earnings in 2011 included pretax charges of $35 million related to exploration write-offs in Libya and $29 million related to Colombia net worth tax, as well as a pre-tax gain for sale of an interest in a Colombian pipeline of $22 million.

## Chemical

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Segment Sales</td><td>$ 4,580</td><td>$ 4,815</td><td>$ 4,016</td></tr><tr><td>Segment Earnings</td><td>$ 720</td><td>$ 861</td><td>$ 438</td></tr><tr><td>Capital Expenditures</td><td>$ 357</td><td>$ 234</td><td>$ 237</td></tr></table>

Chemical segment earnings were $720 million in 2012, compared to $861 million in 2011. The reduction was primarily the result of lower margins due to weaker economic conditions in Europe and Asia and increased competitive activity from these regions. The calcium chloride and potassium hydroxide businesses were also negatively impacted by a mild winter and drought conditions in the United States.

Chemical segment earnings were $861 million in 2011, compared to $438 million in 2010. The 2011 results reflected strong export sales and higher margins resulting from higher demand across most products.

The increase in the chemical capital expenditures was mostly due to the new chlor-alkali plant.

## Midstream, Marketing and Other

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Segment Sales</td><td>$ 1,399</td><td>$ 1,447</td><td>$ 1,471</td></tr><tr><td>Segment Earnings</td><td>$ 439</td><td>$ 448</td><td>$ 472</td></tr><tr><td>Capital Expenditures</td><td>$ 1,558</td><td>$ 1,089</td><td>$ 501</td></tr></table>

Midstream and marketing segment earnings in 2012 were $439 million, compared to $448 million in 2011. The 2012 results reflected lower gas processing earnings and improved marketing and trading performance.

Midstream and marketing segment earnings in 2011 were $448 million, compared to $472 million in 2010. The 2011 results reflected lower gas processing margins, partially offset by improved marketing and trading performance.

The increase in the midstream and marketing capital expenditures was almost entirely due to the Al Hosn gas project.



## SIGNIFICANT ITEMS AFFECTING EARNINGS

The following table sets forth, for the years ended December 31, 2012, 2011 and 2010, significant transactions and events affecting Occidental's earnings that vary widely and unpredictably in nature, timing and amount:

Significant Items Affecting Earnings

<table><tr><td>Benefit (Charge) (in millions)</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>OIL AND GAS</td><td></td><td></td><td></td></tr><tr><td>Asset impairments and related items</td><td>$ (1,731)</td><td>$ —</td><td>$ (275)</td></tr><tr><td>Libya exploration write-off</td><td>—</td><td>(35)</td><td>—</td></tr><tr><td>Gains on sale of Colombian pipeline interest</td><td>—</td><td>22</td><td>—</td></tr><tr><td>Foreign tax</td><td>—</td><td>(29)</td><td>—</td></tr><tr><td>Total Oil and Gas</td><td>$ (1,731)</td><td>$ (42)</td><td>$ (275)</td></tr><tr><td>CHEMICAL</td><td></td><td></td><td></td></tr><tr><td>No significant items affecting earnings</td><td>$ —</td><td>$ —</td><td>$ —</td></tr><tr><td>Total Chemical</td><td>$ —</td><td>$ —</td><td>$ —</td></tr><tr><td>MIDSTREAM AND MARKETING</td><td></td><td></td><td></td></tr><tr><td>No significant items affecting earnings</td><td>$ —</td><td>$ —</td><td>$ —</td></tr><tr><td>Total Midstream and Marketing</td><td>$ —</td><td>$ —</td><td>$ —</td></tr><tr><td>CORPORATE</td><td></td><td></td><td></td></tr><tr><td>Litigation reserves</td><td>$ (20)</td><td>$ —</td><td>$ —</td></tr><tr><td>Premium on debt extinguishments</td><td>—</td><td>(163)</td><td>—</td></tr><tr><td>State income tax charge</td><td>—</td><td>(33)</td><td>—</td></tr><tr><td>Foreign tax credit carry-forwards</td><td>—</td><td>—</td><td>80</td></tr><tr><td>Tax effect of pre-tax adjustments</td><td>636</td><td>50</td><td>100</td></tr><tr><td>Discontinued operations, net of tax (a)</td><td>(37)</td><td>131</td><td>(39)</td></tr><tr><td>Total Corporate</td><td>$ 579</td><td>$ (15)</td><td>$ 141</td></tr></table>

(a) The 2011 amount includes a $144 million after-tax gain from the sale of the Argentine operations.

## TAXES

Deferred tax liabilities, net of deferred tax assets of $2.0 billion, were $5.8 billion at December 31, 2012. The current portion of the deferred tax assets of $250 million is included in other current assets. The deferred tax assets, net of allowances, are expected to be realized through future operating income and reversal of temporary differences.

## Worldwide Effective Tax Rate

The following table sets forth the calculation of the worldwide effective tax rate for income from continuing operations:

<table><tr><td>$ in millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>EARNINGS</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas</td><td>$ 7,095</td><td>$ 10,241</td><td>$ 7,151</td></tr><tr><td>Chemical</td><td>720</td><td>861</td><td>438</td></tr><tr><td>Midstream and Marketing</td><td>439</td><td>448</td><td>472</td></tr><tr><td>Unallocated Corporate Items</td><td>(501)</td><td>(709)</td><td>(497)</td></tr><tr><td>Pre-tax income</td><td>7,753</td><td>10,841</td><td>7,564</td></tr><tr><td>Income tax expense</td><td></td><td></td><td></td></tr><tr><td>Federal and State</td><td>694</td><td>1,795</td><td>1,087</td></tr><tr><td>Foreign</td><td>2,424</td><td>2,406</td><td>1,908</td></tr><tr><td>Total income tax expense</td><td>3,118</td><td>4,201</td><td>2,995</td></tr><tr><td>Income from continuing operations</td><td>$ 4,635</td><td>$ 6,640</td><td>$ 4,569</td></tr><tr><td>Worldwide effective tax rate</td><td>40%</td><td>39%</td><td>40%</td></tr></table>

Occidental’s 2012 worldwide tax rate was 40 percent, slightly higher than 2011 and comparable to 2010 due to higher proportionate foreign pre-tax income in 2012. The 2011 income tax expense included a net $21 million charge for out-of-period state income taxes. The 2010 income tax expense included an $80 million benefit related to foreign tax credit carryforwards.

A deferred tax liability has not been recognized for temporary differences related to unremitted earnings of certain consolidated foreign subsidiaries as it is Occidental’s intention, generally, to reinvest such earnings permanently. If the earnings of these foreign subsidiaries were not indefinitely reinvested, the additional deferred tax liability required would be immaterial, assuming utilization of available foreign tax credits.

## CONSOLIDATED RESULTS OF OPERATIONS

Changes in components of Occidental’s results of operations are discussed below:

Selected Revenue and Other Income Items

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Net sales</td><td>$ 24,172</td><td>$ 23,939</td><td>$ 19,045</td></tr><tr><td>Interest, dividends and other income</td><td>$ 81</td><td>$ 180</td><td>$ 112</td></tr></table>

The increase in net sales in 2012, compared to 2011, was due to higher oil volumes and prices, partially offset by lower gas and NGL prices and lower prices and volumes across most chemical products.

The increase in net sales in 2011, compared to 2010, was due to higher oil and NGL prices, higher oil and gas segment volumes and higher sales, including higher export sales, across most chemical products.

Price and volume changes in the oil and gas segment generally represent a substantially larger portion of the overall change in net sales than the chemical and midstream and marketing segments.



## Selected Expense Items

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Cost of sales (a)</td><td>$ 7,844</td><td>$ 7,385</td><td>$ 6,112</td></tr><tr><td>Selling, general and administrative and other operating expenses</td><td>$ 1,602</td><td>$ 1,523</td><td>$ 1,396</td></tr><tr><td>Depreciation, depletion and amortization</td><td>$ 4,511</td><td>$ 3,591</td><td>$ 3,153</td></tr><tr><td>Taxes other than on income</td><td>$ 680</td><td>$ 605</td><td>$ 484</td></tr><tr><td>Exploration expense</td><td>$ 345</td><td>$ 258</td><td>$ 262</td></tr><tr><td>Asset impairments and related items</td><td>$ 1,751</td><td>$ —</td><td>$ 275</td></tr><tr><td>Interest and debt expense, net</td><td>$ 130</td><td>$ 298</td><td>$ 116</td></tr></table>

(a) Excludes DD&A of $4,504 million in 2012, $3,584 million in 2011 and $3,145 million in 2010.

Cost of sales increased in 2012, compared to 2011, due to higher oil and gas volumes and operating costs, mostly resulting from higher maintenance activity and field support costs, partially offset by lower feedstock and energy costs in the chemical segment.

Cost of sales increased in 2011, compared to 2010, due to higher oil and gas volumes, higher oil and gas operating costs, mostly resulting from higher workover and well maintenance activity and higher feedstock costs in the chemical segment.

Selling, general and administrative and other operating expenses increased in 2012 due to higher headcount, partially offset by lower equity compensation expense and the Colombia net worth tax which increased the 2011 costs.

Selling, general and administrative and other operating expenses increased in 2011 due to higher headcount and environmental remediation expense and the Colombia net worth tax.

DD&A increased in each year from 2010 to 2012, generally due to higher DD&A rates and volumes in the oil and gas segment. The DD&A rate is expected to further increase in 2013.

Taxes other than on income increased in each year from 2010 to 2012, due to higher domestic oil volumes and prices and higher domestic and valorem taxes resulting from higher property values.

Asset impairments and related items in 2012 were almost all in Midcontinent, over 90 percent of which were related to natural gas properties that were acquired more than four years ago on average when gas prices were over $6 per Mcf.

Asset impairments and related items in 2010 predominately related to gas properties in the Rocky Mountain region.

Interest and debt expense, net, in 2011, included the $163 million early debt extinguishment charge recorded in the first quarter of 2011.

## Selected Other Items

<table><tr><td>Income/(expense) (in millions)</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Provision for income taxes</td><td>$ (3,118)</td><td>$ (4,201)</td><td>$ (2,995)</td></tr><tr><td>Income from equity investments</td><td>$ 363</td><td>$ 382</td><td>$ 277</td></tr><tr><td>Discontinued operations, net</td><td>$ (37)</td><td>$ 131</td><td>$ (39)</td></tr><tr><td>Net income attributable to noncontrolling interest</td><td>$ —</td><td>$ —</td><td>$ 72</td></tr></table>

Provision for income taxes decreased in 2012, compared to 2011, due to lower pre-tax income, partially offset by a slightly higher effective tax rate. The higher tax rate was due to higher proportional foreign pre-tax income in 2012, compared to 2011.

Provision for income taxes increased in 2011, compared to 2010, due to higher pre-tax income, partially offset by a slightly lower effective tax rate. The lower tax rate was due to higher proportional domestic pre-tax income in 2011, compared to 2010.

Income from equity investment in 2012 was comparable to 2011.

Income from equity investments increased in 2011, compared to 2010, due to an additional investment in the Plains Pipeline in late 2010 and its higher earnings.

Discontinued operations, net, in 2011, included the $144 million after-tax gain recorded from the sale of the Argentine operations.

There was no net income attributable to noncontrolling interest in 2012 and 2011 due to the restructuring of Occidental’s Colombian operations to take a direct working interest in the related assets as of December 31, 2010.

## CONSOLIDATED ANALYSIS OF FINANCIAL POSITION

The changes in select components of Occidental’s balance sheet are discussed below:

## Selected Balance Sheet Components

<table><tr><td>In millions</td><td>2012</td><td>2011</td></tr><tr><td>CURRENT ASSETS</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 1,592</td><td>$ 3,781</td></tr><tr><td>Trade receivables, net</td><td>4,916</td><td>5,395</td></tr><tr><td>Inventories</td><td>1,344</td><td>1,069</td></tr><tr><td>Other current assets</td><td>1,640</td><td>1,297</td></tr><tr><td>Total current assets</td><td>$ 9,492</td><td>$ 11,542</td></tr><tr><td>Investments in unconsolidated entities</td><td>$ 1,894</td><td>$ 2,072</td></tr><tr><td>Property, plant and equipment, net</td><td>$ 52,064</td><td>$ 45,684</td></tr><tr><td>Long-term receivables and other assets, net</td><td>$ 760</td><td>$ 746</td></tr><tr><td>CURRENT LIABILITIES</td><td></td><td></td></tr><tr><td>Current maturities of long-term debt</td><td>$ 600</td><td>$ —</td></tr><tr><td>Accounts payable</td><td>4,708</td><td>5,304</td></tr><tr><td>Accrued liabilities</td><td>1,966</td><td>2,533</td></tr><tr><td>Domestic and foreign income taxes</td><td>16</td><td>110</td></tr><tr><td>Total current liabilities</td><td>$ 7,290</td><td>$ 7,947</td></tr><tr><td>Long-term debt, net</td><td>$ 7,023</td><td>$ 5,871</td></tr><tr><td>Deferred credits and other liabilities-income taxes</td><td>$ 6,039</td><td>$ 4,846</td></tr><tr><td>Deferred credits and other liabilities-other</td><td>$ 3,810</td><td>$ 3,760</td></tr><tr><td>Stockholders’ equity</td><td>$ 40,048</td><td>$ 37,620</td></tr></table>



## Assets

See "Liquidity and Capital Resources — Cash Flow Analysis" for discussion about the change in cash and cash equivalents.

The decrease in trade receivables, net, was due to lower oil and gas prices at the end of 2012, compared to the end of 2011. The increase in inventories was primarily due to higher volumes of oil in storage and materials and supplies held at the end of 2012, compared to the end of 2011. The increase in other current assets in 2012 resulted from an increase in tax receivables. The decrease in investments in unconsolidated entities was mostly due to higher distributions received in the current year. The increase in PP&E, net, was due to capital expenditures and acquisitions of oil and gas properties, partially offset by DD&A and asset impairments.

## Liabilities and Stockholders' Equity

The increase in current maturities of long-term debt was due to debt maturing in 2013. The decrease in accounts payable reflected lower oil and gas prices in the marketing and trading operations during the fourth quarter of 2012 and lower oil and gas spending levels at the end of 2012, compared to the same periods in 2011. The decrease in accrued liabilities was mostly due to the acceleration of the fourth quarter 2012 dividend payment, which normally would have been accrued as of year end but paid in the first quarter of the following year. The increase in long-term debt, net, was due to the June 2012 issuance of $1.75 billion of senior unsecured notes, partially offset by debt maturities that became current at the end of 2012. The increase in deferred and other domestic and foreign income taxes was mainly due to accelerated tax depreciation of the capital expenditures in 2012. The increase in stockholders' equity reflected net income for 2012, partially offset by dividends and treasury stock purchases.

## LIQUIDITY AND CAPITAL RESOURCES

At December 31, 2012, Occidental had approximately $1.6 billion in cash on hand, a substantial majority of which is held domestically. Income and cash flows are largely dependent on the oil and gas segment's prices and sales volumes. Occidental believes that cash on hand and cash generated from operations will be sufficient to fund its operating needs and planned capital expenditures, dividends and any debt payments.

Occidental has a bank credit facility (Credit Facility) with a $2.0 billion commitment expiring in 2016. No amounts have been drawn under this Credit Facility. Up to $1.0 billion of the Credit Facility is available in the form of letters of credit. Borrowings under the Credit Facility bear interest at various benchmark rates, including LIBOR, plus a margin based on Occidental's senior debt ratings. Additionally, Occidental paid average annual facility fees of 0.08 percent in 2012 on the total commitment amounts of the Credit Facility.

The Credit Facility provides for the termination of loan commitments and requires immediate repayment of any outstanding amounts if certain events of default occur. The Credit Facility and other debt agreements do not contain material adverse change clauses or debt ratings triggers that could restrict Occidental's ability to borrow or that would permit lenders to terminate their commitments or accelerate debt.

As of December 31, 2012, under the most restrictive covenants of its financing agreements, Occidental had substantial capacity for additional unsecured borrowings, the payment of cash dividends and other distributions on, or acquisitions of, Occidental stock.

Occidental has a shelf registration statement that facilitates future issuances of securities. In June 2012, Occidental issued $1.75 billion of debt which comprised $1.25 billion of 2.70-percent senior unsecured notes due 2023 and $500 million of 1.50-percent senior unsecured notes due 2018. Occidental received net proceeds of approximately $1.74 billion. Interest on the notes will be payable semi-annually in arrears in February and August for each series of notes.

Occidental, from time to time, may access and has accessed debt markets for general corporate purposes, including acquisitions.

## Cash Flow Analysis

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Net cash provided by operating activities</td><td>$ 11,312</td><td>$ 12,281</td><td>$ 9,566</td></tr></table>

Although net income decreased by $2.2 billion for the twelve months ended December 31, 2012, compared to the same period of 2011, net cash provided by operating activities only decreased by $1.0 billion for this period. Compared to 2011, net income in 2012 included much larger non-cash charges, which reduced net income but not cash provided by operating activities. These non-cash charges mainly comprised asset impairments and higher DD&A. Working capital changes in 2012 further reduced cash flow from operations by approximately $0.8 billion, compared to 2011.

Additionally, operating cash flows in 2012, compared to 2011, reflected lower domestic gas and worldwide NGL prices, by 35 percent and 19 percent, respectively, and higher maintenance activity and field support costs, partially offset by higher domestic oil volumes and 2-percent higher worldwide oil prices. The positive cash-flow impact of the oil price change was more than offset by the negative effect of significant declines in gas and NGL prices. The decrease in operating cash flows in 2012, compared to 2011, also reflected lower chemical margins, primarily due to weaker economic conditions in Europe and Asia.

Other cost elements, such as labor costs and overhead, are not significant drivers of changes in cash flow because they are relatively stable within a narrow range over the short to intermediate term. Changes in these costs had a much smaller effect on cash flow than the changes in oil prices and volumes and gas and NGL prices.

The most important sources of the increase in operating cash flow in 2011, compared to 2010, were higher worldwide oil and NGL prices and volumes. In 2011,



compared to 2010, Occidental's global realized oil and NGL prices increased 30 percent and 23 percent, respectively. In 2011, Occidental's oil and NGL production accounted for 71 percent of its total net sales. Increases in field support, workover and well maintenance costs in 2011, compared to 2010, partially offset the increases in prices and volumes. The increase in operating cash flows in 2011, compared to 2010, also reflected high chemical product prices and margins for most products.

The impact of the chemical and the midstream and marketing segments on overall cash flows is generally less significant than the impact of the oil and gas segment because the chemical and midstream and marketing segments are significantly smaller.

Other non-cash charges to income in 2012, 2011 and 2010 included charges for stock-based compensation plans and asset retirement obligation accruals.

Operating cash flows for discontinued operations include the Argentine operations through the date they were sold in February 2011.

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Capital expenditures</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas</td><td>$ (8,220)</td><td>$ (6,145)</td><td>$ (3,166)</td></tr><tr><td>Chemical</td><td>(357)</td><td>(234)</td><td>(237)</td></tr><tr><td>Midstream and Marketing</td><td>(1,558)</td><td>(1,089)</td><td>(501)</td></tr><tr><td>Corporate</td><td>(91)</td><td>(50)</td><td>(36)</td></tr><tr><td>Total</td><td>(10,226)</td><td>(7,518)</td><td>(3,940)</td></tr><tr><td>Other investing activities, net</td><td>(2,429)</td><td>(4,955)</td><td>(4,940)</td></tr><tr><td>Net cash used by investing activities - continuing operations</td><td>(12,655)</td><td>(12,473)</td><td>(8,880)</td></tr><tr><td>Investing cash flow from discontinued operations</td><td>—</td><td>2,570</td><td>(415)</td></tr><tr><td>Net cash used by investing activities</td><td>$ (12,655)</td><td>$ (9,903)</td><td>$ (9,295)</td></tr></table>

The increase in capital expenditures of $2.7 billion from 2011 to 2012 was mainly due to the $2.1 billion increase in oil and gas expenditures, a majority of which was in domestic properties, such as Permian and California, as well as increases throughout the Middle East. Occidental's United States average operated-rig activity increased 25 percent from 51 rigs in 2011 to 64 rigs in 2012. The rig count was 41 at the end of 2012. The increase in the midstream and marketing capital expenditures was almost entirely due to the Al Hosn gas project.

Occidental's capital spending is expected to decrease in 2013 to approximately $9.6 billion and will be focused on increasing oil production and ensuring Occidental's returns remain well above its costs of capital given current prices and the cost environment. The reduction in capital will come entirely from the oil and gas segment, almost all of which will be in Occidental's domestic operations. Occidental expects that a meaningful portion of the capital reduction will come from efficiencies in its drilling program. During the fourth quarter of 2012, Occidental embarked on an efficiency program that, among other things, targeted a 15-percent reduction in its drilling costs. Through the end of 2012 and early 2013, Occidental believes that it has already achieved about half of the targeted savings with further improvements expected during the remainder of 2013. Occidental believes it will be able to grow oil production while reducing capital expenditures because it expects much of the capital reduction to come from efficiencies and not reduced activity. It expects only a modest impact on natural gas and NGL production from reduced gas drilling. The midstream and marketing segment capital spending will increase mainly for the BridgeTex pipeline. The 2013 capital program is expected to be approximately 75 percent in oil and gas, 11 percent in the Al Hosn gas project, 9 percent in domestic midstream and marketing and the remainder in the chemical segment.

Occidental expects to spend about 25 percent of its total capital expenditures on projects that will begin contributing to its earnings and cash flow over the next several years. These projects include the Al Hosn gas project, the BridgeTex pipeline, expansion of gas and  \( CO_{2} \)  processing plants and a new chlor-alkali plant in the chemical business. As of December 31, 2012, the accumulated balance of such project costs that will contribute to earnings in future years, excluding costs of undeveloped acreage, was approximately $3.1 billion. Occidental expects this balance to grow by the end of 2013 before these investments start generating returns in 2014.

The 2012 other investing activities, net amount included $2.5 billion in cash payments for the acquisitions of businesses and assets, largely consisting of various interests in domestic oil and gas properties in the Permian Basin, the Williston Basin, California and South Texas. Also included in 2012 investing activities was approximately $190 million of cash dividends received as investment returns.

The increase in capital expenditures of $3.6 billion from 2010 to 2011 was mainly due to the $3.0 billion increase in oil and gas expenditures, which reflected Occidental's share of development costs in Oman and Bahrain, and higher spending in domestic properties in California, the Permian Basin, South Texas and the Williston Basin. Occidental's United States operated rig activity increased 89 percent from 38 rigs at year-end 2010 to 72 rigs at year-end 2011.

The 2011 other investing activities, net amount included $4.9 billion in cash payments for the acquisitions of businesses and assets, including various interests in domestic oil and gas properties, in operated, producing and non-producing properties in California and the Permian and Williston Basins for approximately $2.4 billion, properties in South Texas for $1.8 billion and $0.5 billion for Occidental's share of pre-acquisition development expenditures incurred by the Al Hosn gas project.

The 2010 other investing activities, net amount included $4.9 billion in cash payments for the acquisitions of businesses and assets, including acquisitions of various interests in domestic oil and gas properties, in operated, producing and non-producing properties in the Permian Basin, Midcontinent region and California, for approximately $2.5 billion, properties in North Dakota for approximately $1.4 billion, additional interests in Plains Pipeline for approximately $430 million and the remaining 50-percent interest in EHP for approximately $175 million, as well as foreign contract payments of approximately $225 million.



Investing cash flow from discontinued operations included $2.6 billion of cash received from the sale of the Argentine operations in 2011, and capital expenditures of $310 million in 2010.

Commitments at December 31, 2012, for major fixed and determinable capital expenditures were approximately $2.2 billion, which will be due in 2013 and beyond. Occidental expects to fund these commitments and capital expenditures with cash from operations.

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Net cash (used) provided by financing activities</td><td>$ (846)</td><td>$ (1,175)</td><td>$ 1,083</td></tr></table>

The 2012 net cash used by financing activities included net proceeds of approximately $1.7 billion from the June 2012 issuance of senior unsecured notes. Common stock dividends paid increased by $0.7 billion to $2.1 billion in 2012, which included the accelerated payment of the fourth quarter dividend. In addition, purchases of treasury stock increased from $274 million in 2011 to $583 million.

The 2011 amount included net proceeds of approximately $2.1 billion from the August 2011 issuance of senior unsecured notes and financing cash flow use of $1.5 billion to retire other long-term debt. Common stock dividends paid increased from $1.1 billion in 2010 to $1.4 billion in 2011. In addition, purchases of treasury stock increased from $67 million in 2010 to $274 million in 2011.

The 2010 amount included net proceeds of approximately $2.6 billion from the issuance of senior unsecured notes and financing cash flow use of $311 million to retire other long-term debt.

## OFF-BALANCE-SHEET ARRANGEMENTS

The following is a description of the business purpose and nature of Occidental's off-balance-sheet arrangements.

## Guarantees

Occidental has guaranteed certain equity investees' debt and has entered into various other guarantees including performance bonds, letters of credit, indemnities and commitments provided by Occidental to third parties, mainly to provide assurance that OPC or its subsidiaries and affiliates will meet their various obligations (guarantees). As of December 31, 2012, Occidental's guarantees were not material and a substantial majority consisted of limited recourse guarantees on approximately $370 million of Dolphin's debt, for which the fair value was immaterial.

See "Oil and Gas Segment — Business Review — Qatar" and "Segment Results of Operations" for further information about Dolphin.

## Leases

Occidental has entered into various operating lease agreements, mainly for transportation equipment, power plants, machinery, terminals, storage facilities, land and office space. Occidental leases assets when leasing offers greater operating flexibility. Lease payments are generally expensed as part of cost of sales and selling, general and administrative expenses. For more information, see "Contractual Obligations."

## CONTRACTUAL OBLIGATIONS

The table below summarizes and cross-references Occidental’s contractual obligations. This summary indicates on- and off-balance-sheet obligations as of December 31, 2012.

<table><tr><td rowspan="2">Contractual Obligations (in millions)</td><td rowspan="2">Total</td><td colspan="4">Payments Due by Year</td></tr><tr><td>2013</td><td>2014 and 2015</td><td>2016 and 2017</td><td>2018 and thereafter</td></tr><tr><td>On-Balance Sheet</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Long-term debt (Note 5) (a)</td><td>$ 7,654</td><td>$ 600</td><td>$ —</td><td>$2,700</td><td>$ 4,354</td></tr><tr><td>Other long-term liabilities (b)</td><td>2,202</td><td>276</td><td>477</td><td>200</td><td>1,249</td></tr><tr><td>Off-Balance Sheet</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Operating leases (Note 6)</td><td>976</td><td>158</td><td>211</td><td>147</td><td>460</td></tr><tr><td>Purchase obligations (c)</td><td>8,723</td><td>2,745</td><td>2,065</td><td>923</td><td>2,990</td></tr><tr><td>Total</td><td>$19,555</td><td>$3,779</td><td>$2,753</td><td>$3,970</td><td>$ 9,053</td></tr></table>

(a) Excludes unamortized debt discount and interest on the debt. As of December 31, 2012, interest on long-term debt totaling $1.7 billion is payable in the following years (in millions): 2013 - $230, 2014 and 2015 - $443, 2016 and 2017 - $341, 2018 and thereafter - $658.

(b) Includes obligations under postretirement benefit and deferred compensation plans, as well as certain accrued liabilities.

(c) Amounts include payments which will become due under long-term agreements to purchase goods and services used in the normal course of business to secure terminal and pipeline capacity, drilling rigs and services,  \( CO_{2} \)  electrical power, steam and certain chemical raw materials. Amounts exclude certain oil purchase obligations related to marketing and trading activities for which there are no minimum purchase requirements. Long-term purchase contracts are discounted at a 3.0-percent discount rate.

## Delivery Commitments

Occidental has made commitments to certain refineries and other buyers to deliver a portion of its oil, gas and NGL production. The total amount contracted to be delivered, a substantial majority of which is in the United States, is approximately 65 million barrels of oil through 2019, 73 billion cubic feet of gas through 2016 and 3 million barrels of NGLs through 2013. The price for these deliveries is set at the time of delivery of the product. Occidental has significantly more production capacity than the amounts committed and none of the commitments in any given year are material. In addition, Occidental has the ability to secure additional volumes in the case of a shortfall.



## LAWSUITS, CLAIMS AND CONTINGENCIES

OPC or certain of its subsidiaries are involved, in the normal course of business, in lawsuits, claims and other legal proceedings that seek, among other things, compensation for alleged personal injury, breach of contract, property damage or other losses, punitive damages, civil penalties, or injunctive or declaratory relief. OPC or certain of its subsidiaries also are involved in proceedings under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and similar federal, state, local and foreign environmental laws. These environmental proceedings seek funding or performance of remediation and, in some cases, compensation for alleged property damage, punitive damages, civil penalties and injunctive relief. Usually OPC or such subsidiaries are among many companies in these environmental proceedings and have to date been successful in sharing response costs with other financially sound companies. Further, some lawsuits, claims and legal proceedings involve acquired assets with respect to which third parties retain liability or indemnify Occidental for conditions that existed prior to purchase.

Occidental accrues reserves for currently outstanding lawsuits, claims and proceedings when it is probable that a liability has been incurred and the liability can be reasonably estimated. Occidental has disclosed its reserve balances for environmental matters. Reserve balances for other matters as of December 31, 2012 and 2011, were not material to Occidental's consolidated balance sheets. Occidental also evaluates the amount of reasonably possible losses that it could incur as a result of the matters mentioned above. Occidental has disclosed its range of reasonably possible additional losses for sites where it is a participant in environmental remediation. Occidental believes that other reasonably possible losses that it could incur in excess of reserves accrued on the balance sheet would not be material to its consolidated financial position or results of operations. Environmental matters are further discussed under the caption "Environmental Liabilities and Expenditures" below.

On October 5, 2012, an Arbitral Tribunal of the International Centre for Settlement of Investment Disputes (ICSID), an agency of the World Bank, found that Ecuador violated the United States - Ecuador Bilateral Investment Treaty in 2006 when it terminated Occidental's Block 15 concession. The Tribunal ordered Ecuador to pay $1.77 billion, plus interest, in damages. Ecuador has filed an application asking ICSID to annul the damage award; it could take over a year for ICSID to rule on Ecuador's application for annulment. Pursuant to a 2000 Farmout Agreement, Andes Petroleum is entitled to 40% of any net amount which Occidental recovers from Ecuador in this ICSID proceeding. The effect, if any, on the financial statements will be recognized upon final resolution of this matter.

During the course of its operations, Occidental is subject to audit by tax authorities for varying periods in various federal, state, local and foreign tax jurisdictions. Although taxable years through 2009 for United States federal income tax purposes have been audited by the United States Internal Revenue Service (IRS) pursuant to its Compliance Assurance Program, subsequent taxable years are currently under review. Additionally, in December 2012, Occidental filed United States federal refund claims for tax years 2008 and 2009 which are subject to IRS review. Taxable years from 2000 through the current year remain subject to examination by foreign and state government tax authorities in certain jurisdictions. In certain of these jurisdictions, tax authorities are in various stages of auditing Occidental's income taxes. During the course of tax audits, disputes have arisen and other disputes may arise as to facts and matters of law. Occidental believes that the resolution of outstanding tax matters would not have a material adverse effect on its consolidated financial position or results of operations.

OPC, its subsidiaries or both have indemnified various parties against specified liabilities those parties might incur in the future in connection with purchases and other transactions that they have entered into with Occidental. These indemnities usually are contingent upon the other party incurring liabilities that reach specified thresholds. As of December 31, 2012, Occidental is not aware of circumstances that it believes would reasonably be expected to lead to indemnity claims that would result in payments materially in excess of reserves.

## ENVIRONMENTAL LIABILITIES AND EXPENDITURES

Occidental’s operations are subject to stringent federal, state, local and foreign laws and regulations related to improving or maintaining environmental quality. Occidental’s environmental compliance costs have generally increased over time and are expected to rise in the future. Occidental factors environmental expenditures for its operations into its business planning process as an integral part of producing quality products responsive to market demand.

## Environmental Remediation

The laws that require or address environmental remediation, including CERCLA and similar federal, state, local and foreign laws, may apply retroactively and regardless of fault, the legality of the original activities or the current ownership or control of sites. OPC or certain of its subsidiaries participate in or actively monitor a range of remedial activities and government or private proceedings under these laws with respect to alleged past practices at operating, closed and third-party sites. Remedial activities may include one or more of the following: investigation involving sampling, modeling, risk assessment or monitoring; cleanup measures including removal, treatment or disposal; or operation and maintenance of remedial systems. The environmental proceedings seek funding or performance of remediation and, in some cases, compensation for alleged property damage, punitive damages, civil penalties, injunctive relief and government oversight costs.

As of December 31, 2012, Occidental participated in or monitored remedial activities or proceedings at 161 sites. The following table presents Occidental’s environmental remediation reserves as of December 31, 2012, 2011 and 2010, grouped as environmental remediation sites listed or proposed for listing by the U.S. Environmental Protection



Agency on the CERCLA National Priorities List (NPL sites) and three categories of non-NPL sites — third-party sites, Occidental-operated sites and closed or non-operated Occidental sites.

<table><tr><td rowspan="2">$ amounts in millions</td><td colspan="2">2012</td><td colspan="2">2011</td><td colspan="2">2010</td></tr><tr><td># of Sites</td><td>Reserve Balance</td><td># of Sites</td><td>Reserve Balance</td><td># of Sites</td><td>Reserve Balance</td></tr><tr><td>NPL sites</td><td>35</td><td>$ 54</td><td>36</td><td>$ 63</td><td>38</td><td>$ 56</td></tr><tr><td>Third-party sites</td><td>75</td><td>84</td><td>73</td><td>88</td><td>83</td><td>91</td></tr><tr><td>Occidental-operated sites</td><td>22</td><td>123</td><td>22</td><td>120</td><td>20</td><td>122</td></tr><tr><td>Closed or non-operated Occidental sites</td><td>29</td><td>83</td><td>29</td><td>89</td><td>29</td><td>97</td></tr><tr><td>Total</td><td>161</td><td>$ 344</td><td>160</td><td>$ 360</td><td>170</td><td>$ 366</td></tr></table>

As of December 31, 2012, Occidental's environmental reserves exceeded $10 million each at 12 of the 161 sites described above, and 112 of the sites had reserves from $0 to $1 million each.

As of December 31, 2012, two landfills in western New York owned by Occidental accounted for 73 percent of its reserves associated with NPL sites. In connection with a 1986 acquisition, Maxus Energy Corporation has retained the liability and indemnified Occidental for 14 of the remaining NPL sites.

As of December 31, 2012, Maxus has also retained the liability and indemnified Occidental for 8 of the 75 third-party sites. Two of the remaining 67 third-party sites — a former copper mining and smelting operation in Tennessee and a containment and removal project in Tennessee — accounted for 43 percent of Occidental's reserves associated with these sites.

Five sites — chemical plants in Kansas, Louisiana, Texas and New York and a group of oil and gas properties in the southwestern United States — accounted for 70 percent of the reserves associated with the Occidental-operated sites.

Three other sites — former chemical plants in Tennessee and Delaware and a closed coal mine in Pennsylvania — accounted for 55 percent of the reserves associated with closed or non-operated Occidental sites.

Environmental reserves vary over time depending on factors such as acquisitions or dispositions, identification of additional sites and remedy selection and implementation. The following table presents environmental reserve activity for the past three years:

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Balance — Beginning of Year</td><td>$ 360</td><td>$ 366</td><td>$ 403</td></tr><tr><td>Remediation expenses and interest accretion</td><td>56</td><td>53</td><td>26</td></tr><tr><td>Changes from acquisitions/dispositions</td><td>—</td><td>14</td><td>3</td></tr><tr><td>Payments</td><td>(72)</td><td>(73)</td><td>(66)</td></tr><tr><td>Balance — End of Year</td><td>$ 344</td><td>$ 360</td><td>$ 366</td></tr></table>

Based on current estimates, Occidental expects to expend funds corresponding to approximately half of the current environmental reserves at the sites described above over the next four years and the balance at these sites over the subsequent 10 or more years. Occidental believes its range of reasonably possible additional losses beyond those liabilities recorded for environmental remediation at these sites could be up to $375 million. See "Critical Accounting Policies and Estimates — Environmental Liabilities and Expenditures" for additional information.

Occidental’s environmental costs, some of which include estimates, are presented below for each segment for each of the years ended December 31:

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Operating Expenses</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas</td><td>$ 160</td><td>$ 158</td><td>$ 108</td></tr><tr><td>Chemical</td><td>70</td><td>68</td><td>72</td></tr><tr><td>Midstream and Marketing</td><td>20</td><td>21</td><td>13</td></tr><tr><td></td><td>$ 250</td><td>$ 247</td><td>$ 193</td></tr><tr><td>Capital Expenditures</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas</td><td>$ 122</td><td>$ 110</td><td>$ 72</td></tr><tr><td>Chemical</td><td>18</td><td>15</td><td>19</td></tr><tr><td>Midstream and Marketing</td><td>12</td><td>15</td><td>13</td></tr><tr><td></td><td>$ 152</td><td>$ 140</td><td>$ 104</td></tr><tr><td>Remediation Expenses</td><td></td><td></td><td></td></tr><tr><td>Corporate</td><td>$ 56</td><td>$ 52</td><td>$ 25</td></tr></table>

Operating expenses are incurred on a continual basis. Capital expenditures relate to longer-lived improvements in currently operating properties. Remediation expenses relate to existing conditions from past operations.

Occidental presently estimates capital expenditures for environmental compliance of approximately $130 million for 2013.

## FOREIGN INVESTMENTS

Many of Occidental’s assets are located outside North America. At December 31, 2012, the carrying value of Occidental’s assets in countries outside North America aggregated approximately $12.3 billion, or approximately 19 percent of Occidental’s total assets at that date. Of such assets, approximately $10.6 billion are located in the Middle East/North Africa and approximately $1.6 billion are located in Latin America. For the year ended December 31, 2012, net sales outside North America totaled $8.8 billion, or approximately 36 percent of total net sales.

## CRITICAL ACCOUNTING POLICIES AND ESTIMATES

The process of preparing financial statements in accordance with generally accepted accounting principles requires Occidental's management to make informed estimates and judgments regarding certain items and transactions. Changes in facts and circumstances or discovery of new information may result in revised estimates and judgments, and actual results may differ from these estimates upon settlement but generally not by material amounts. There has been no material change to Occidental's critical accounting policies over the past three years. The selection and development of these policies and estimates have been discussed with the Audit Committee of the Board of Directors. Occidental considers the following to be its most critical accounting policies and estimates that involve management's judgment.



## Oil and Gas Properties

The carrying value of Occidental's property, plant and equipment (PP&E) represents the cost incurred to acquire or develop the asset, including any asset retirement obligations and capitalized interest, net of accumulated depreciation, depletion and amortization (DD&A) and net of any impairment charges. For assets acquired, PP&E cost is based on fair values at the acquisition date. Asset retirement obligations and interest costs incurred in connection with qualifying capital expenditures are capitalized and amortized over the lives of the related assets.

Occidental uses the successful efforts method to account for its oil and gas properties. Under this method, Occidental capitalizes costs of acquiring properties, costs of drilling successful exploration wells and development costs. The costs of exploratory wells are initially capitalized pending a determination of whether proved reserves have been found. If proved reserves have been found, the costs of exploratory wells remain capitalized. Otherwise, Occidental charges the costs of the related wells to expense. In some cases, a determination of proved reserves cannot be made at the completion of drilling, requiring additional testing and evaluation of the wells. Occidental generally expenses the costs of such exploratory wells if a determination of proved reserves has not been made within a 12-month period after drilling is complete.

Occidental expenses annual lease rentals and geological, geophysical and seismic costs as incurred.

Occidental expenses the costs of injectants used in production.

Occidental determines depreciation and depletion of oil and gas producing properties by the unit-of-production method. It amortizes acquisition costs over total proved reserves and capitalized development and successful exploration costs over proved developed reserves.

Proved oil and gas reserves (as defined in the Securities and Exchange Commission's Regulation S-X, Rule 4-10(a)) are those quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible—from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations—prior to the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain, regardless of whether deterministic or probabilistic methods are used for the estimation. Occidental has no proved oil and gas reserves for which the determination of economic producibility is subject to the completion of major additional capital expenditures.

Several factors could change Occidental's proved oil and gas reserves. For example, Occidental receives a share of production from PSCs to recover its costs and generally an additional share for profit. Occidental's share of production and reserves from these contracts decreases when oil prices rise and increases when oil prices decline. Overall, Occidental's net economic benefit from these contracts is greater at higher oil prices. In other cases, particularly with long-lived properties, lower product prices may lead to a situation where production of a portion of proved reserves becomes uneconomical. For such properties, higher product prices typically result in additional reserves becoming economical. Estimation of future production and development costs is also subject to change partially due to factors beyond Occidental's control, such as energy costs and inflation or deflation of oil field service costs. These factors, in turn, could lead to changes in the quantity of proved reserves. Additional factors that could result in a change of proved reserves include production decline rates and operating performance differing from those estimated when the proved reserves were initially recorded. In 2012, revisions of previous estimates provided a net 183 million BOE reduction to proved reserves, which amounted to less than 6 percent of Occidental's total reserves as of December 31, 2012.

In 2012, revisions related to price for the company as a whole were negative. A substantial majority of such revisions related to Occidental's domestic gas reserves and resulted from lower domestic gas prices. These lower prices and the resulting changes in Occidental's plans for drilling on gas properties constituted a majority of its total revisions. To the extent gas prices recover in the future, a portion of these reserves will be reinstated. If natural gas prices decrease further for an extended period, domestic gas reserves could experience additional negative price revisions.

The most significant financial statement effect from a change in Occidental's oil and gas reserves would be to the DD&A rate. For example, a 5-percent increase or decrease in the amount of oil and gas reserves would change the DD&A rate by approximately $0.80 per barrel, which would increase or decrease pre-tax income by approximately $225 million annually at current production rates. The change in the DD&A rate over the past three years due to revisions of previous proved reserve estimates has been immaterial.

A portion of the carrying value of Occidental's oil and gas properties is attributable to unproved properties. At December 31, 2012, the net capitalized costs attributable to unproved properties were $4.8 billion. The unproved amounts are not subject to DD&A until they are classified as proved properties. As exploration and development work progresses, if reserves on these properties are proved, capitalized costs attributable to the properties become subject to DD&A. If the exploration and development work were to be unsuccessful, or management's plans changed with respect to these properties, as a result of economic, operating or contractual conditions, the capitalized costs of the related properties would be expensed. The timing of any writedowns of these unproved properties, if warranted, depends upon management's plans, the nature, timing and extent of future exploration and development activities and their results. Occidental believes its current plans and exploration and development efforts will allow it to realize its unproved property balance.

Additionally, Occidental performs impairment tests with respect to its proved properties generally when prices decline other than temporarily, reserve estimates change significantly or other significant events occur that may



impact its ability to realize the recorded asset amounts. Impairment tests incorporate a number of assumptions involving expectations of future cash flows, which can change significantly over time. These assumptions include estimates of future product prices, which Occidental bases on forward price curves and, when applicable, contractual prices, estimates of oil and gas reserves and estimates of future expected operating and development costs.

In the fourth quarter of 2012, impairment charges totaling $1.7 billion pre-tax were taken on certain proved and unproved properties. Almost all of the charges were for certain properties in Midcontinent, over 90 percent of which were related to natural gas properties that were acquired more than four years ago on average when gas prices were more than $6 per Mcf. These properties were impacted by persistently low natural gas prices in the United States changing management's development plans and negative reserve revisions due to recent well performance. Any impairment loss would be calculated as the excess of the asset's net book value over its estimated fair value. Any further sustained declines in gas prices as well as significant sustained reductions in the prices of other products may result in additional impairments in the future.

## Chemical Assets

Occidental's chemical assets are depreciated using either the unit-of-production or the straight-line method, based upon the estimated useful lives of the facilities. The estimated useful lives of Occidental's chemical assets, which range from three years to 50 years, are also used for impairment tests. The estimated useful lives for the chemical facilities are based on the assumption that Occidental will provide an appropriate level of annual expenditures to ensure productive capacity is sustained. Such expenditures consist of ongoing routine repairs and maintenance, as well as planned major maintenance activities (PMMA). Ongoing routine repairs and maintenance expenditures are expensed as incurred. PMMA costs are capitalized and amortized over the period until the next planned overhaul. Additionally, Occidental incurs capital expenditures that extend the remaining useful lives of existing assets, increase their capacity or operating efficiency beyond the original specification or add value through modification for a different use. These capital expenditures are not considered in the initial determination of the useful lives of these assets at the time they are placed into service. The resulting revision, if any, of the asset's estimated useful life is measured and accounted for prospectively.

Without these continued expenditures, the useful lives of these assets could decrease significantly. Other factors that could change the estimated useful lives of Occidental's chemical assets include sustained higher or lower product prices, which are particularly affected by both domestic and foreign competition, demand, feedstock costs, energy prices, environmental regulations and technological changes.
Occidental performs impairment tests on its chemical assets whenever events or changes in circumstances lead to a reduction in the estimated useful lives or estimated future cash flows that would indicate that the carrying amount may not be recoverable, or when management's plans change with respect to those assets. Any impairment loss would be calculated as the excess of the asset's net book value over its estimated fair value.

Occidental’s net PP&E for the chemical segment is approximately $2.6 billion and its depreciation expense for 2013 is expected to be approximately $300 million. The most significant financial statement impact of a decrease in the estimated useful lives of Occidental’s chemical plants would be on depreciation expense. For example, a reduction in the remaining useful lives of one year would increase depreciation and reduce pre-tax earnings by approximately $45 million per year.

## Midstream, Marketing and Other Assets

Derivatives are carried at fair value and on a net basis when a legal right of offset exists with the same counterparty. Occidental applies hedge accounting when transactions meet specified criteria for cash-flow hedge treatment and management elects and documents such treatment. Otherwise, any fair value gains or losses are recognized in earnings in the current period. For cash-flow hedges, the gain or loss on the effective portion of the derivative is reported as a component of other comprehensive income (OCI) with an offsetting adjustment to the basis of the item being hedged. Realized gains or losses from cash-flow hedges, and any ineffective portion, are recorded as a component of net sales in the consolidated statements of income. Ineffectiveness is primarily created by a basis difference between the hedged item and the hedging instrument due to location, quality or grade of the physical commodity transactions. Gains and losses from derivative instruments are reported net in the consolidated statements of income. There were no fair value hedges as of and during the year ended December 31, 2012.

A hedge is regarded as highly effective such that it qualifies for hedge accounting if, at inception and throughout its life, it is expected that changes in the fair value or cash flows of the hedged item will be offset by 80 to 125 percent of the changes in the fair value or cash flows, respectively, of the hedging instrument. In the case of hedging a forecast transaction, the transaction must be probable and must present an exposure to variations in cash flows that could ultimately affect reported net income or loss. Occidental discontinues hedge accounting when it determines that a derivative has ceased to be highly effective as a hedge; when the hedged item matures or is sold or repaid; or when a forecast transaction is no longer deemed probable.



Occidental's midstream and marketing PP&E is depreciated over the estimated useful lives of the assets, using either the unit-of-production or straight-line method. Occidental performs impairment tests on its midstream and marketing assets whenever events or changes in circumstances lead to a reduction in the estimated useful lives or estimated future cash flows that would indicate that the carrying amount may not be recoverable, or when management's plans change with respect to those assets. Any impairment loss would be calculated as the excess of the asset's net book value over its estimated fair value.

## Fair Value Measurements

Occidental has categorized its assets and liabilities that are measured at fair value in a three-level fair value hierarchy, based on the inputs to the valuation techniques: Level 1 – using quoted prices in active markets for identical assets or liabilities; Level 2 – using observable inputs other than quoted prices for identical assets or liabilities; and Level 3 – using unobservable inputs. Transfers between levels, if any, are recognized at the end of each reporting period.

## Fair Values - Recurring

Occidental primarily applies the market approach for recurring fair value measurements, maximizes its use of observable inputs and minimizes its use of unobservable inputs. Occidental utilizes the mid-point price between bid and ask prices for valuing the majority of its assets and liabilities measured and reported at fair value. In addition to using market data, Occidental makes assumptions in valuing its assets and liabilities, including assumptions about the risks inherent in the inputs to the valuation technique. For assets and liabilities carried at fair value, Occidental measures fair value using the following methods:

Commodity derivatives – Occidental values exchange-cleared commodity derivatives using closing prices provided by the exchange as of the balance sheet date. These derivatives are classified as Level 1. Over-the-Counter (OTC) bilateral financial commodity contracts, foreign exchange contracts, options and physical commodity forward purchase and sale contracts are generally valued using quotations provided by brokers or industry-standard models that consider various inputs, including quoted forward prices for commodities, time value, volatility factors, credit risk and current market and contractual prices for the underlying instruments, as well as other relevant economic measures. Substantially all of these inputs are observable in the marketplace throughout the full term of the instrument, and can be derived from observable data or are supported by observable prices at which transactions are executed in the marketplace. Occidental generally classifies these measurements as Level 2.
Embedded commodity derivatives – Occidental values embedded commodity derivatives based on a market approach that considers various assumptions, including quoted forward commodity prices and market yield curves. The assumptions used include inputs that are observable and unobservable in the marketplace, and the fair value is designated as Level 3 within the valuation hierarchy.

Occidental generally uses an income approach to measure fair value when there is not a market-observable price for an identical or similar asset or liability. This approach utilizes management's judgments regarding expectations of projected cash flows, and discounts those cash flows using a risk-adjusted discount rate.

## Environmental Liabilities and Expenditures

Environmental expenditures that relate to current operations are expensed or capitalized as appropriate. Occidental records environmental reserves for estimated remediation costs that relate to existing conditions from past operations when environmental remediation efforts are probable and the costs can be reasonably estimated. In determining the reserves and the range of reasonably possible additional losses, Occidental refers to currently available information, including relevant past experience, remedial objectives, available technologies, applicable laws and regulations and cost-sharing arrangements. Occidental bases environmental reserves on management's estimate of the most likely cost to be incurred, using the most cost-effective technology reasonably expected to achieve the remedial objective. Occidental periodically reviews reserves and adjusts them as new information becomes available. Occidental records environmental reserves on a discounted basis when it deems the aggregate amount and timing of cash payments to be reliably determinable at the time the reserves are established. The reserve methodology with respect to discounting for a specific site is not modified once it is established. The amount of discounted environmental reserves is insignificant. Occidental generally records reimbursements or recoveries of environmental remediation costs in income when received, or when receipt of recovery is highly probable. As of December 31, 2012, 2011 and 2010, Occidental did not have any accruals for reimbursements or recoveries.

Many factors could affect Occidental’s future remediation costs and result in adjustments to its environmental reserves and range of reasonably possible additional losses. The most significant are: (1) cost estimates for remedial activities may be inaccurate; (2) the length of time, type or amount of remediation necessary to achieve the remedial objective may change due to factors such as site conditions, the ability to identify and control contaminant sources or the discovery of additional contamination; (3) a regulatory agency may ultimately reject or modify Occidental’s proposed remedial plan; (4) improved or alternative remediation technologies may change remediation costs; (5) laws and regulations may change remediation requirements or affect cost sharing or allocation of liability; and (6) changes in allocation or cost-sharing arrangements.



Certain sites involve multiple parties with various cost-sharing arrangements, which fall into the following three categories: (1) environmental proceedings that result in a negotiated or prescribed allocation of remediation costs among Occidental and other alleged potentially responsible parties; (2) oil and gas ventures in which each participant pays its proportionate share of remediation costs reflecting its working interest; or (3) contractual arrangements, typically relating to purchases and sales of properties, in which the parties to the transaction agree to methods of allocating remediation costs. In these circumstances, Occidental evaluates the financial viability of other parties with whom it is alleged to be jointly liable, the degree of their commitment to participate and the consequences to Occidental of their failure to participate when estimating Occidental's ultimate share of liability. Occidental records reserves at its expected net cost of remedial activities and, based on these factors, believes that it will not be required to assume a share of liability of such other potentially responsible parties in an amount materially above amounts reserved.

In addition to the costs of investigations and cleanup measures, which often take in excess of 10 years at NPL sites, Occidental's reserves include management's estimates of the costs to operate and maintain remedial systems. If remedial systems are modified over time in response to significant changes in site-specific data, laws, regulations, technologies or engineering estimates, Occidental reviews and adjusts its reserves accordingly.

If Occidental were to adjust the environmental reserve balance based on the factors described above, the amount of the increase or decrease would be recognized in earnings. For example, if the reserve balance were reduced by 10 percent, Occidental would record a pre-tax gain of $34 million. If the reserve balance were increased by 10 percent, Occidental would record an additional remediation expense of $34 million.

## Other Loss Contingencies

Occidental is involved with numerous lawsuits, claims, proceedings and audits in the normal course of its operations. Occidental records a loss contingency for these matters when it is probable that an asset has been impaired or a liability has been incurred and the amount of the loss can be reasonably estimated. In addition, Occidental discloses, in aggregate, its exposure to loss in excess of the amount recorded on the balance sheet for these matters if it is reasonably possible that an additional material loss may be incurred. Occidental reviews its loss contingencies on an ongoing basis.

Loss contingencies are based on judgments made by management with respect to the likely outcome of these matters and are adjusted as appropriate. Management's judgments could change based on new information, changes in, or interpretations of, laws or regulations, changes in management's plans or intentions, opinions regarding the outcome of legal proceedings, or other factors. See "Lawsuits, Claims and Other Contingencies" for additional information.

## SIGNIFICANT ACCOUNTING AND DISCLOSURE CHANGES

Listed below are significant recently adopted accounting and disclosure changes.

## Fair Value Measurements

Beginning in the quarter ended March 31, 2012, Occidental enhanced its fair value measurement application and disclosures as a result of adopting new requirements issued by the Financial Accounting Standards Board in May 2011. The new rules include revisions to the standards for the use of fair value measurements and additional disclosures for: (i) all transfers between Level 1 and Level 2 of the fair value hierarchy; (ii) Level 3 measurements; and (iii) hierarchy classifications used for assets and liabilities whose fair value is disclosed only in the footnotes. The new rules did not have a material impact on Occidental.

## DERIVATIVE ACTIVITIES AND MARKET RISK
Commodity Price Risk

## General

Occidental’s results are sensitive to fluctuations in oil, NGL and natural gas prices. Price changes at current global prices and levels of production affect Occidental’s pre-tax annual income by approximately $150 million for a $1 per barrel change in oil prices and $30 million for a $1 per barrel change in NGL prices. If domestic natural gas prices varied by $0.50 per Mcf, it would have an estimated annual effect on Occidental’s pre-tax income of approximately $115 million. These price-change sensitivities include the impact of PSC and similar contract volume changes on income. If production levels change in the future, the sensitivity of Occidental’s results to oil and gas prices also will change. The marketing and trading results are also sensitive to price changes of oil, gas and, to a lesser degree, other commodities. These sensitivities are additionally dependent on marketing and trading volumes and cannot be predicted reliably.

Occidental’s results are also sensitive to fluctuations in chemical prices. A variation in chlorine and caustic soda prices of $10 per ton would have a pre-tax annual effect on income of approximately $10 million and $30 million, respectively. A variation in PVC prices of $0.01 per lb. would have a pre-tax annual effect on income of approximately $25 million. Historically, over time, product price changes have tracked raw material and feedstock product price changes, somewhat mitigating the effect of price changes on margins. According to Chemical Market Associates, Inc., December 2012 average contract prices were: chlorine—$255 per ton; caustic soda—$635 per ton; and PVC—$0.56 per lb.

Occidental uses derivative instruments, including a combination of short-term futures, forwards, options and swaps, to establish, as of the date of production, the price it receives and to improve realized prices for oil and gas. Occidental only occasionally hedges its oil and gas production and, when it does so, the volumes are usually insignificant. Additionally, Occidental’s Phibro trading unit engages in trading activities using derivatives for the



purpose of generating profits mainly from market price changes of commodities.

## Risk Management

Occidental conducts its risk management activities for marketing and trading activities under the controls and governance of its risk control policy. The controls under this policy are implemented and enforced by certain members of management embedded in the marketing and trading operations in order to manage risk by providing an independent and separate evaluation and check. These members of management report to the Corporate Vice President and Treasurer. The President and Chief Executive Officer and risk committees comprising members of Occidental's senior corporate management also oversee these controls. Controls for these activities include limits on value at risk, limits on credit, limits on total notional trade value, segregation of duties, delegation of authority, daily price verifications, daily reporting to senior management of positions together with various risk measures and a number of other policy and procedural controls. Additionally, these operations maintain highly liquid positions, as a result of which the market risk typically can be neutralized on short notice.

## Fair Value of Marketing and Trading Derivative Contracts

Occidental's marketing and trading derivative contracts are carried at fair value and result from third-party marketing and trading activities, sales of its production and activities to generate profits mainly from price changes in the commodities markets.

The following table shows the fair value of Occidental's derivatives (excluding collateral), segregated by maturity periods and by methodology of fair value estimation:

<table><tr><td rowspan="2">Source of Fair Value Assets/(liabilities) (in millions)</td><td colspan="5">Maturity Periods</td></tr><tr><td>2013</td><td>2014 and 2015</td><td>2016 and 2017</td><td>2018 and thereafter</td><td>Total</td></tr><tr><td>Prices actively quoted</td><td>$ 9</td><td>$ (1)</td><td>$ —</td><td>$ —</td><td>$ 8</td></tr><tr><td>Prices provided by other external sources</td><td>(60)</td><td>(27)</td><td>1</td><td>—</td><td>(86)</td></tr><tr><td>Total</td><td>$ (51)</td><td>$ (26)</td><td>$ 1</td><td>$ —</td><td>$ (78)</td></tr></table>

Note: Includes cash-flow hedges further discussed below.

## Cash-Flow Hedges

Occidental entered into financial swap agreements in November 2012 for the sale of a portion of its natural gas production in California. These swap agreements hedge 50 million cubic feet of natural gas per day beginning in January 2013 through March 2014 and qualify as cash-flow hedges. The weighted-average strike price of these swaps is $4.30.

Through March 31, 2012, Occidental held financial swap agreements related to the sale of 50 million cubic feet per day of its existing natural gas production from the Rocky Mountain region of the United States that qualified as cash-flow hedges at a weighted-average strike price of $6.07.

Through 2011, Occidental held a series of collar agreements for 12,000 barrels of oil per day of its domestic production that qualified as cash-flow hedges at a weighted-average strike price that ranged from $32.92 to $46.35.

Occidental’s marketing and trading operations store natural gas purchased from third parties at Occidental’s North American leased storage facilities. Derivative instruments are used to fix margins on the future sales of the stored volumes through March 31, 2013. As of December 31, 2012 and 2011, Occidental had approximately 20 billion cubic feet and 25 billion cubic feet of natural gas held in storage, respectively. As of December 31, 2012 and 2011, Occidental had cash-flow hedges for the forecast sale, to be settled by physical delivery, of approximately 20 billion cubic feet and 35 billion cubic feet of this stored natural gas, respectively.

As of December 31, 2012, the total fair value of cash-flow hedges, which was a net asset of $9 million, was included in the total fair value table in "Fair Value of Marketing and Trading Derivative Contracts" above.

## Quantitative Information

Occidental uses value at risk to estimate the potential effects of changes in fair values of commodity-based and foreign currency derivatives and commodity contracts used in marketing and trading activities. This method determines the maximum potential negative short-term change in fair value with at least a 95-percent level of confidence. Additionally, Occidental uses trading limits, including, among others, limits on total notional trade value, and maintains liquid positions as a result of which market risk typically can be neutralized on short notice. As a result of these controls, Occidental has determined that the market risk of the marketing and trading activities is not reasonably likely to have a material adverse effect on it.

## Interest Rate Risk

## General

Occidental’s exposure to changes in interest rates is not expected to be material and relates to its variable-rate long-term debt obligations. As of December 31, 2012, variable-rate debt constituted approximately 1 percent of Occidental’s total debt.

## Tabular Presentation of Interest Rate Risk

The table below provides information about Occidental's debt obligations. Debt amounts represent principal payments by maturity date.

<table><tr><td>Year of Maturity (in millions of U.S. dollars)</td><td>U.S. Dollar Fixed-Rate Debt</td><td>U.S. Dollar Variable-Rate Debt</td><td>Grand Total (a)</td></tr><tr><td>2013</td><td>$ 600</td><td>$ —</td><td>$ 600</td></tr><tr><td>2014</td><td>—</td><td>—</td><td>—</td></tr><tr><td>2015</td><td>—</td><td>—</td><td>—</td></tr><tr><td>2016</td><td>1,450</td><td>—</td><td>1,450</td></tr><tr><td>2017</td><td>1,250</td><td>—</td><td>1,250</td></tr><tr><td>Thereafter</td><td>4,286</td><td>68</td><td>4,354</td></tr><tr><td>Total</td><td>$ 7,586</td><td>$ 68</td><td>$ 7,654</td></tr><tr><td>Weighted-average interest rate</td><td>3.03%</td><td>0.13%</td><td>3.01%</td></tr><tr><td>Fair Value</td><td>$ 8,164</td><td>$ 68</td><td>$ 8,232</td></tr></table>

(a) Excludes unamortized debt discounts of $31 million.



## Credit Risk

Occidental's credit risk relates primarily to its derivative financial instruments and trade receivables. Occidental's contracts are spread among a large number of counterparties. Creditworthiness is reviewed before doing business with a new counterparty and on an ongoing basis, and master netting arrangements are used when appropriate. Credit exposure for each customer is monitored for outstanding balances, current activity, and forward mark-to-market exposure.

A substantial portion of Occidental's derivative transaction volume is executed through exchange-traded contracts, which are subject to nominal credit risk as a significant portion of these transactions is settled on a daily margin basis with select clearinghouses and brokers. Occidental executes the rest of its derivative transactions in the OTC market. Occidental is subject to counterparty credit risk to the extent the counterparty to the derivatives is unable to meet its settlement commitments. Occidental manages this credit risk by selecting counterparties that it believes to be financially strong, by spreading the credit risk among many such counterparties, by entering into master netting arrangements with the counterparties and by requiring collateral, as appropriate. Occidental actively monitors the creditworthiness of each counterparty and records valuation adjustments to reflect counterparty risk, if necessary.

Certain of Occidental's OTC derivative instruments contain credit-risk-contingent features, primarily tied to credit ratings for Occidental or its counterparties, which may affect the amount of collateral that each would need to post. As of December 31, 2012 and 2011, Occidental had a net liability of $34 million and $58 million, respectively, which are net of collateral posted of $64 million and $27 million, respectively. Occidental believes that if it had received a one-notch reduction in its credit ratings, it would not have resulted in a material change in its collateral-posting requirements as of December 31, 2012 and 2011.

As of December 31, 2012, the substantial majority of the credit exposures was with investment grade counterparties. Occidental believes its exposure to credit-related losses at December 31, 2012 was not material and losses associated with credit risk have been insignificant for all years presented.

## Foreign Currency Risk

Occidental’s foreign operations have limited currency risk. Occidental manages its exposure primarily by balancing monetary assets and liabilities and limiting cash positions in foreign currencies to levels necessary for operating purposes. A vast majority of international oil sales are denominated in United States dollars. Additionally, all of Occidental’s consolidated foreign oil and gas subsidiaries have the United States dollar as the functional currency. As of December 31, 2012, the fair value of foreign currency derivatives used in the trading operations was immaterial. The effect of exchange rates on transactions in foreign currencies is included in periodic income.

## SAFE HARBOR DISCUSSION REGARDING
OUTLOOK AND OTHER FORWARD-LOOKING DATA

Portions of this report, including Items 1 and 2 (including the information appearing under the captions "Legal Proceedings," "Business and Properties — Competition and Sales and Marketing") and Items 7 and 7A (including "Management's Discussion and Analysis of Financial Condition and Results of Operations," including the information under the sub captions "Strategy," "Oil and Gas Segment — Operations, United Arab Emirates," "—Proved Reserves," "—Business Review" and "—Industry Outlook," "Chemical Segment — Business Review, Basic Chemicals," "—Industry Outlook," "Midstream, Marketing and Other Segment — Business Review, Gas Processing Plants and CO₂ Fields and Facilities" and "—Business Review, Pipeline Transportation," "—Industry Outlook," "Segment Results of Operations — Oil and Gas," "Taxes," "Consolidated Results of Operations — Selected Expense Items," "Liquidity and Capital Resources," "Lawsuits, Claims and Other Contingencies," "Environmental Liabilities and Expenditures," "Critical Accounting Policies and Estimates," and "Derivative Activities and Market Risk"), contain forward-looking statements and involve risks and uncertainties that could materially affect expected results of operations, liquidity, cash flows and business prospects. Words such as "estimate," "project," "predict," "will," "would," "should," "could," "may," "might," "anticipate," "plan," "intend," "believe," "expect," "aim," "goal," "target," "objective," "likely" or similar expressions that convey the prospective nature of events or outcomes generally indicate forward-looking statements. You should not place undue reliance on these forward-looking statements, which speak only as of the date of this report. Unless legally required, Occidental does not undertake any obligation to update any forward-looking statements as a result of new information, future events or otherwise. Factors that may cause Occidental's results of operations and financial position to differ from expectations include items noted in Item 1A "Risk Factors," and elsewhere.



## ITEM 8 FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

## MANAGEMENT'S ANNUAL ASSESSMENT OF AND REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

The management of Occidental Petroleum Corporation and subsidiaries (Occidental) is responsible for establishing and maintaining adequate internal control over financial reporting. Occidental's system of internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of consolidated financial statements for external purposes in accordance with generally accepted accounting principles. Occidental'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 Occidental's assets; (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 Occidental's receipts and expenditures are being made only in accordance with authorizations of Occidental's management and directors; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of Occidental's assets that could have a material effect on the financial statements.

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.

Management has assessed the effectiveness of Occidental’s internal control system as of December 31, 2012, based on the criteria for effective internal control over financial reporting described in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this assessment, management believes that, as of December 31, 2012, Occidental’s system of internal control over financial reporting is effective.

Occidental’s independent auditors, KPMG LLP, have issued an audit report on Occidental’s internal control over financial reporting.



# REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON CONSOLIDATED FINANCIAL STATEMENTS

To the Board of Directors and Stockholders

Occidental Petroleum Corporation:

We have audited the accompanying consolidated balance sheets of Occidental Petroleum Corporation and subsidiaries as of December 31, 2012 and 2011, and the related consolidated statements of income, comprehensive income, stockholders' equity and cash flows for each of the years in the three-year period ended December 31, 2012. In connection with our audits of the consolidated financial statements, we also have audited the accompanying financial statement schedule. These consolidated financial statements and financial statement schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these consolidated financial statements and financial statement schedule based on our 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 audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Occidental Petroleum Corporation and subsidiaries as of December 31, 2012 and 2011, and the results of their operations and their cash flows for each of the years in the three-year period ended December 31, 2012, in conformity with U.S. generally accepted accounting principles. Also in our opinion, the related financial statement schedule, when considered in relation to the basic consolidated financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Occidental Petroleum Corporation and subsidiaries' internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), and our report dated February 26, 2013 expressed an unqualified opinion on the effectiveness of the Company's internal control over financial reporting.



Los Angeles, California
February 26, 2013



# REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON INTERNAL CONTROL OVER FINANCIAL REPORTING

To the Board of Directors and Stockholders

Occidental Petroleum Corporation:

We have audited Occidental Petroleum Corporation and subsidiaries' internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Annual Assessment of and Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company's internal control over financial reporting 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 effective internal control over financial reporting was maintained in all material respects. Our audit 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 audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

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: (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) 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 (3) 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.

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.

In our opinion, Occidental Petroleum Corporation and its subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Occidental Petroleum Corporation and subsidiaries as of December 31, 2012 and 2011, and the related consolidated statements of income, comprehensive income, stockholders' equity and cash flows for each of the years in the three-year period ended December 31, 2012, and our report dated February 26, 2013 expressed an unqualified opinion on those consolidated financial statements.



Los Angeles, California

February 26, 2013



<table><tr><td>Assets at December 31,</td><td>2012</td><td>2011</td></tr><tr><td>CURRENT ASSETS</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 1,592</td><td>$ 3,781</td></tr><tr><td>Trade receivables, net of reserves of $16 in both 2012 and 2011</td><td>4,916</td><td>5,395</td></tr><tr><td>Inventories</td><td>1,344</td><td>1,069</td></tr><tr><td>Other current assets</td><td>1,640</td><td>1,297</td></tr><tr><td>Total current assets</td><td>9,492</td><td>11,542</td></tr><tr><td>INVESTMENTS IN UNCONSOLIDATED ENTITIES</td><td>1,894</td><td>2,072</td></tr><tr><td>PROPERTY, PLANT AND EQUIPMENT</td><td></td><td></td></tr><tr><td>Oil and gas segment</td><td>65,417</td><td>56,682</td></tr><tr><td>Chemical segment</td><td>6,054</td><td>5,715</td></tr><tr><td>Midstream, marketing and other segment</td><td>7,191</td><td>5,664</td></tr><tr><td>Corporate</td><td>1,434</td><td>1,310</td></tr><tr><td></td><td>80,096</td><td>69,371</td></tr><tr><td>Accumulated depreciation, depletion and amortization</td><td>(28,032)</td><td>(23,687)</td></tr><tr><td></td><td>52,064</td><td>45,684</td></tr><tr><td>LONG-TERM RECEIVABLES AND OTHER ASSETS, NET</td><td>760</td><td>746</td></tr><tr><td>TOTAL ASSETS</td><td>$ 64,210</td><td>$ 60,044</td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



<table><tr><td>Liabilities and Stockholders&#x27; Equity at December 31,</td><td>2012</td><td>2011</td></tr><tr><td>CURRENT LIABILITIES</td><td></td><td></td></tr><tr><td>Current maturities of long-term debt</td><td>$ 600</td><td>$ —</td></tr><tr><td>Accounts payable</td><td>4,708</td><td>5,304</td></tr><tr><td>Accrued liabilities</td><td>1,966</td><td>2,533</td></tr><tr><td>Domestic and foreign income taxes</td><td>16</td><td>110</td></tr><tr><td>Total current liabilities</td><td>7,290</td><td>7,947</td></tr><tr><td>LONG-TERM DEBT, NET</td><td>7,023</td><td>5,871</td></tr><tr><td>DEFERRED CREDITS AND OTHER LIABILITIES</td><td></td><td></td></tr><tr><td>Deferred domestic and foreign income taxes</td><td>6,039</td><td>4,846</td></tr><tr><td>Other</td><td>3,810</td><td>3,760</td></tr><tr><td></td><td>9,849</td><td>8,606</td></tr><tr><td>CONTINGENT LIABILITIES AND COMMITMENTS</td><td></td><td></td></tr><tr><td>STOCKHOLDERS&#x27; EQUITY</td><td></td><td></td></tr><tr><td>Common stock, $0.20 par value, authorized 1.1 billion shares, outstanding shares:</td><td></td><td></td></tr><tr><td>2012 — 888,801,436 and 2011 — 886,808,654</td><td>178</td><td>177</td></tr><tr><td>Treasury stock: 2012 — 83,287,187 shares and 2011 — 75,799,573 shares</td><td>(5,091)</td><td>(4,502)</td></tr><tr><td>Additional paid-in capital</td><td>7,441</td><td>7,286</td></tr><tr><td>Retained earnings</td><td>37,990</td><td>35,142</td></tr><tr><td>Accumulated other comprehensive loss</td><td>(502)</td><td>(483)</td></tr><tr><td>Total equity attributable to common stock</td><td>40,016</td><td>37,620</td></tr><tr><td>Noncontrolling interest</td><td>32</td><td>—</td></tr><tr><td>Total equity</td><td>40,048</td><td>37,620</td></tr><tr><td>TOTAL LIABILITIES AND STOCKHOLDERS&#x27; EQUITY</td><td>$ 64,210</td><td>$ 60,044</td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



<table><tr><td>For the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>REVENUES AND OTHER INCOME</td><td></td><td></td><td></td></tr><tr><td>Net sales</td><td>$ 24,172</td><td>$ 23,939</td><td>$ 19,045</td></tr><tr><td>Interest, dividends and other income</td><td>81</td><td>180</td><td>112</td></tr><tr><td></td><td>24,253</td><td>24,119</td><td>19,157</td></tr><tr><td>COSTS AND OTHER DEDUCTIONS</td><td></td><td></td><td></td></tr><tr><td>Cost of sales (excludes depreciation, depletion and amortization of $4,504 in 2012, $3,584 in 2011 and $3,145 in 2010)</td><td>7,844</td><td>7,385</td><td>6,112</td></tr><tr><td>Selling, general and administrative and other operating expenses</td><td>1,602</td><td>1,523</td><td>1,396</td></tr><tr><td>Depreciation, depletion and amortization</td><td>4,511</td><td>3,591</td><td>3,153</td></tr><tr><td>Asset impairments and related items</td><td>1,751</td><td>—</td><td>275</td></tr><tr><td>Taxes other than on income</td><td>680</td><td>605</td><td>484</td></tr><tr><td>Exploration expense</td><td>345</td><td>258</td><td>262</td></tr><tr><td>Interest and debt expense, net</td><td>130</td><td>298</td><td>116</td></tr><tr><td></td><td>16,863</td><td>13,660</td><td>11,798</td></tr><tr><td>INCOME BEFORE INCOME TAXES AND OTHER ITEMS</td><td>7,390</td><td>10,459</td><td>7,359</td></tr><tr><td>Provision for domestic and foreign income taxes</td><td>(3,118)</td><td>(4,201)</td><td>(2,995)</td></tr><tr><td>Income from equity investments</td><td>363</td><td>382</td><td>277</td></tr><tr><td>INCOME FROM CONTINUING OPERATIONS</td><td>4,635</td><td>6,640</td><td>4,641</td></tr><tr><td>Discontinued operations, net</td><td>(37)</td><td>131</td><td>(39)</td></tr><tr><td>NET INCOME</td><td>4,598</td><td>6,771</td><td>4,602</td></tr><tr><td>Less: Net income attributable to noncontrolling interest</td><td>—</td><td>—</td><td>(72)</td></tr><tr><td>NET INCOME ATTRIBUTABLE TO COMMON STOCK</td><td>$ 4,598</td><td>$ 6,771</td><td>$ 4,530</td></tr><tr><td>BASIC EARNINGS PER COMMON SHARE (attributable to common stock)</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 5.72</td><td>$ 8.16</td><td>$ 5.62</td></tr><tr><td>Discontinued operations, net</td><td>(0.05)</td><td>0.16</td><td>(0.05)</td></tr><tr><td>BASIC EARNINGS PER COMMON SHARE</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.57</td></tr><tr><td>DILUTED EARNINGS PER COMMON SHARE (attributable to common stock)</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 5.71</td><td>$ 8.16</td><td>$ 5.61</td></tr><tr><td>Discontinued operations, net</td><td>(0.04)</td><td>0.16</td><td>(0.05)</td></tr><tr><td>DILUTED EARNINGS PER COMMON SHARE</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.56</td></tr><tr><td>DIVIDENDS PER COMMON SHARE</td><td>$ 2.16</td><td>$ 1.84</td><td>$ 1.47</td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



<table><tr><td>For the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Net income attributable to common stock</td><td>$ 4,598</td><td>$ 6,771</td><td>$ 4,530</td></tr><tr><td>Other comprehensive income (loss) items:</td><td></td><td></td><td></td></tr><tr><td>Foreign currency translation (losses) gains</td><td>(25)</td><td>(11)</td><td>4</td></tr><tr><td>Unrealized gains on derivatives (a)</td><td>16</td><td>14</td><td>37</td></tr><tr><td>Pension and postretirement gains (losses) (b)</td><td>14</td><td>(60)</td><td>(52)</td></tr><tr><td>Reclassification to income of realized (gains) losses on derivatives (c)</td><td>(24)</td><td>98</td><td>83</td></tr><tr><td>Other comprehensive income (loss), net of tax (d)</td><td>(19)</td><td>41</td><td>72</td></tr><tr><td>Comprehensive income attributable to common stock</td><td>$ 4,579</td><td>$ 6,812</td><td>$ 4,602</td></tr></table>

(a) Net of tax of $(9), $(7) and $(20) in 2012, 2011 and 2010, respectively.

(b) Net of tax of $(8), $34 and $30 in 2012, 2011 and 2010, respectively.

(c) Net of tax of $14, ($56) and ($47) in 2012, 2011 and 2010, respectively.

(d) There were no other comprehensive income (loss) items related to noncontrolling interests in 2012, 2011 and 2010.

## Consolidated Statements of Stockholders' Equity

In millions

<table><tr><td rowspan="2"></td><td colspan="8">Equity Attributable to Common Stock</td></tr><tr><td>Common Stock</td><td>Treasury Stock</td><td>Additional Paid-in Capital</td><td>Retained Earnings</td><td>Accumulated Other Comprehensive Income (Loss)</td><td>Noncontrolling Interest</td><td>Total Equity</td><td></td></tr><tr><td>Balance, December 31, 2009</td><td>$ 177</td><td>$ (4,161)</td><td>$ 7,127</td><td>$ 26,534</td><td>$ (596)</td><td>$ 78</td><td>$ 29,159</td><td></td></tr><tr><td>Net income</td><td>—</td><td>—</td><td>—</td><td>4,530</td><td>—</td><td>72</td><td>4,602</td><td></td></tr><tr><td>Other comprehensive income, net of tax</td><td>—</td><td>—</td><td>—</td><td>—</td><td>72</td><td>—</td><td>72</td><td></td></tr><tr><td>Dividends on common stock</td><td>—</td><td>—</td><td>—</td><td>(1,196)</td><td>—</td><td>—</td><td>(1,196)</td><td></td></tr><tr><td>Issuance of common stock and other, net</td><td>—</td><td>—</td><td>64</td><td>—</td><td>—</td><td>—</td><td>64</td><td></td></tr><tr><td>Noncontrolling interest distributions and other</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(150) (a)</td><td>(150)</td><td></td></tr><tr><td>Purchases of treasury stock</td><td>—</td><td>(67)</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(67)</td><td></td></tr><tr><td>Balance, December 31, 2010</td><td>$ 177</td><td>$ (4,228)</td><td>$ 7,191</td><td>$ 29,868</td><td>$ (524)</td><td>$ —</td><td>$ 32,484</td><td></td></tr><tr><td>Net income</td><td>—</td><td>—</td><td>—</td><td>6,771</td><td>—</td><td>—</td><td>6,771</td><td></td></tr><tr><td>Other comprehensive income, net of tax</td><td>—</td><td>—</td><td>—</td><td>—</td><td>41</td><td>—</td><td>41</td><td></td></tr><tr><td>Dividends on common stock</td><td>—</td><td>—</td><td>—</td><td>(1,497)</td><td>—</td><td>—</td><td>(1,497)</td><td></td></tr><tr><td>Issuance of common stock and other, net</td><td>—</td><td>—</td><td>95</td><td>—</td><td>—</td><td>—</td><td>95</td><td></td></tr><tr><td>Purchases of treasury stock</td><td>—</td><td>(274)</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(274)</td><td></td></tr><tr><td>Balance, December 31, 2011</td><td>$ 177</td><td>$ (4,502)</td><td>$ 7,286</td><td>$ 35,142</td><td>$ (483)</td><td>$ —</td><td>$ 37,620</td><td></td></tr><tr><td>Net income</td><td>—</td><td>—</td><td>—</td><td>4,598</td><td>—</td><td>—</td><td>4,598</td><td></td></tr><tr><td>Other comprehensive loss, net of tax</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(19)</td><td>—</td><td>(19)</td><td></td></tr><tr><td>Dividends on common stock</td><td>—</td><td>—</td><td>—</td><td>(1,750)</td><td>—</td><td>—</td><td>(1,750)</td><td></td></tr><tr><td>Issuance of common stock and other, net</td><td>1</td><td>—</td><td>155</td><td>—</td><td>—</td><td>—</td><td>156</td><td></td></tr><tr><td>Noncontrolling interest contributions</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>32 (b)</td><td>32</td><td></td></tr><tr><td>Purchases of treasury stock</td><td>—</td><td>(589)</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(589)</td><td></td></tr><tr><td>Balance, December 31, 2012</td><td>$ 178</td><td>$ (5,091)</td><td>$ 7,441</td><td>$ 37,990</td><td>$ (502)</td><td>$ 32</td><td>$ 40,048</td><td></td></tr></table>

(a) On December 31, 2010, Occidental restructured its Colombian operations to take a direct working interest in the related assets.

(b) Reflects contributions from the noncontrolling interest in a pipeline company.

The accompanying notes are an integral part of these consolidated financial statements.



<table><tr><td>For the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>CASH FLOW FROM OPERATING ACTIVITIES</td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$     4,598</td><td>$     6,771</td><td>$     4,602</td></tr><tr><td>Adjustments to reconcile net income to net cash provided by operating activities:</td><td></td><td></td><td></td></tr><tr><td>Discontinued operations, net</td><td>37</td><td>(131)</td><td>39</td></tr><tr><td>Depreciation, depletion and amortization of assets</td><td>4,511</td><td>3,591</td><td>3,153</td></tr><tr><td>Deferred income tax provision</td><td>1,128</td><td>1,436</td><td>406</td></tr><tr><td>Other noncash charges to income</td><td>195</td><td>190</td><td>231</td></tr><tr><td>Asset impairments and related items</td><td>1,751</td><td>—</td><td>275</td></tr><tr><td>Undistributed earnings from equity investments</td><td>(30)</td><td>(33)</td><td>(60)</td></tr><tr><td>Dry hole expenses</td><td>279</td><td>160</td><td>139</td></tr><tr><td>Changes in operating assets and liabilities:</td><td></td><td></td><td></td></tr><tr><td>Decrease (increase) in receivables</td><td>472</td><td>(360)</td><td>(929)</td></tr><tr><td>(Increase) decrease in inventories</td><td>(265)</td><td>(50)</td><td>(42)</td></tr><tr><td>Decrease in other current assets</td><td>127</td><td>95</td><td>210</td></tr><tr><td>(Decrease) increase in accounts payable and accrued liabilities</td><td>(1,086)</td><td>657</td><td>1,146</td></tr><tr><td>Increase (decrease) in current domestic and foreign income taxes</td><td>1</td><td>(174)</td><td>186</td></tr><tr><td>Other operating, net</td><td>(370)</td><td>154</td><td>—</td></tr><tr><td>Operating cash flow from continuing operations</td><td>11,348</td><td>12,306</td><td>9,356</td></tr><tr><td>Operating cash flow from discontinued operations, net of taxes</td><td>(36)</td><td>(25)</td><td>210</td></tr><tr><td>Net cash provided by operating activities</td><td>11,312</td><td>12,281</td><td>9,566</td></tr><tr><td>CASH FLOW FROM INVESTING ACTIVITIES</td><td></td><td></td><td></td></tr><tr><td>Capital expenditures</td><td>(10,226)</td><td>(7,518)</td><td>(3,940)</td></tr><tr><td>Payments for purchases of assets and businesses</td><td>(2,490)</td><td>(4,909)</td><td>(4,924)</td></tr><tr><td>Sales of assets, net</td><td>4</td><td>50</td><td>20</td></tr><tr><td>Other, net</td><td>57</td><td>(96)</td><td>(36)</td></tr><tr><td>Investing cash flow from continuing operations</td><td>(12,655)</td><td>(12,473)</td><td>(8,880)</td></tr><tr><td>Investing cash flow from discontinued operations</td><td>—</td><td>2,570</td><td>(415)</td></tr><tr><td>Net cash used by investing activities</td><td>(12,655)</td><td>(9,903)</td><td>(9,295)</td></tr><tr><td>CASH FLOW FROM FINANCING ACTIVITIES</td><td></td><td></td><td></td></tr><tr><td>Proceeds from long-term debt</td><td>1,736</td><td>2,111</td><td>2,584</td></tr><tr><td>Payments of long-term debt</td><td>—</td><td>(1,523)</td><td>(311)</td></tr><tr><td>Proceeds from issuance of common stock</td><td>85</td><td>50</td><td>10</td></tr><tr><td>Purchases of treasury stock</td><td>(583)</td><td>(274)</td><td>(67)</td></tr><tr><td>Contributions from (distributions to) noncontrolling interest</td><td>32</td><td>(121)</td><td>—</td></tr><tr><td>Cash dividends paid</td><td>(2,128)</td><td>(1,436)</td><td>(1,159)</td></tr><tr><td>Other, net</td><td>12</td><td>18</td><td>26</td></tr><tr><td>Net cash (used) provided by financing activities</td><td>(846)</td><td>(1,175)</td><td>1,083</td></tr><tr><td>(Decrease) increase in cash and cash equivalents</td><td>(2,189)</td><td>1,203</td><td>1,354</td></tr><tr><td>Cash and cash equivalents — beginning of year</td><td>3,781</td><td>2,578</td><td>1,224</td></tr><tr><td>Cash and cash equivalents — end of year</td><td>$     1,592</td><td>$     3,781</td><td>$     2,578</td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



## NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

## NATURE OF OPERATIONS

In this report, "Occidental" means Occidental Petroleum Corporation, a Delaware corporation (OPC), or OPC and one or more entities in which it owns a controlling interest (subsidiaries). Occidental conducts its operations through various subsidiaries and affiliates. Occidental's principal businesses consist of the oil and gas, chemical and midstream, marketing and other (midstream and marketing) segments. The oil and gas segment explores for, develops and produces oil and condensate, natural gas liquids (NGLs) and natural gas. The chemical segment (OxyChem) mainly manufactures and markets basic chemicals and vinyls. The midstream and marketing segment gathers, processes, transports, stores, purchases and markets oil, condensate, NGLs, natural gas, carbon dioxide ( \( CO_{2} \) ) and power. It also trades around its assets, including transportation and storage capacity, and trades oil, NGLs, gas and other commodities. The segment also invests in entities that conduct similar activities.

## PRINCIPLES OF CONSOLIDATION

The consolidated financial statements have been prepared in conformity with United States generally accepted accounting principles (GAAP) and include the accounts of OPC, its subsidiaries and its undivided interests in oil and gas exploration and production ventures. Occidental accounts for its share of oil and gas exploration and production ventures, in which it has a direct working interest, by reporting its proportionate share of assets, liabilities, revenues, costs and cash flows within the relevant lines on the balance sheets, income statements and cash flow statements.

Certain financial statements, notes and supplementary data for prior years have been reclassified to conform to the 2012 presentation.

## INVESTMENTS IN UNCONSOLIDATED ENTITIES

Occidental’s percentage interest in the underlying net assets of affiliates as to which it exercises significant influence without having a controlling interest (excluding oil and gas ventures in which Occidental holds an undivided interest) are accounted for under the equity method. Occidental reviews equity-method investments for impairment whenever events or changes in circumstances indicate that an other-than-temporary decline in value may have occurred. The amount of impairment, if any, is based on quoted market prices, when available, or other valuation techniques, including discounted cash flows.

## REVENUE RECOGNITION

Revenue is recognized from oil and gas production when title has passed to the customer, which occurs when the product is shipped. In international locations where oil is shipped by tanker, title passes when the tanker is loaded or product is received by the customer, depending on the shipping terms. This process occasionally causes a difference between actual production in a reporting period and sales volumes that have been recognized as revenue.

Revenue from chemical product sales is recognized when the product is shipped and title has passed to the customer. Certain incentive programs may provide for payments or credits to be made to customers based on the volume of product purchased over a defined period. Total customer incentive payments over a given period are estimated and recorded as a reduction to revenue ratably over the contract period. Such estimates are evaluated and revised as warranted.

Revenue from marketing and trading activities is recognized on net settled transactions upon completion of contract terms and, for physical deliveries, upon title transfer. For unsettled transactions, contracts are recorded at fair value and changes in fair value are reflected in net sales. Revenue from all marketing and trading activities is reported on a net basis.

Occidental records revenue net of any taxes, such as sales taxes, that are assessed by governmental authorities on Occidental's customers.

## RISKS AND UNCERTAINTIES

The process of preparing consolidated financial statements in conformity with GAAP requires Occidental's management to make informed estimates and judgments regarding certain types of financial statement balances and disclosures. Such estimates primarily relate to unsettled transactions and events as of the date of the consolidated financial statements and judgments on the materiality of transactions and balances. Changes in facts and circumstances or discovery of new information relating to such transactions and events may result in revised estimates and judgments and actual results may differ from estimates upon settlement but generally not by material amounts. Management believes that these estimates and judgments provide a reasonable basis for the fair presentation of Occidental's financial statements.

Occidental establishes a valuation allowance against net operating losses and other deferred tax assets to the extent it believes the future benefit from these assets will not be realized in the statutory carryforward periods. Realization of deferred tax assets, including any net operating loss carryforwards, is dependent upon Occidental generating sufficient future taxable income and reversal of temporary differences in jurisdictions where such assets originate.



The accompanying consolidated financial statements include assets of approximately $12.3 billion as of December 31, 2012, and net sales of approximately $8.8 billion for the year ended December 31, 2012, relating to Occidental's operations in countries outside North America. Occidental operates some of its oil and gas business in countries that occasionally have experienced political instability, nationalizations, armed conflict, terrorism, insurgency, civil unrest, security problems, labor unrest, OPEC production restrictions, equipment import restrictions and sanctions, all of which increase Occidental's risk of loss or delayed or restricted production or may result in other adverse consequences. Occidental attempts to conduct its affairs so as to mitigate its exposure to such risks and would seek compensation in the event of nationalization.

Because Occidental’s major products are commodities, significant changes in the prices of oil and gas and chemical products may have a significant impact on Occidental’s results of operations.

Also, see "Property, Plant and Equipment" below.

## CASH AND CASH EQUIVALENTS

Cash equivalents are short-term, highly liquid investments that are readily convertible to cash. Cash equivalents were approximately $1.0 billion and $3.5 billion at December 31, 2012 and 2011, respectively.

## Investments

Available-for-sale securities are recorded at fair value with any unrealized gains or losses included in accumulated other comprehensive income/loss (AOCI). Trading securities are recorded at fair value with unrealized and realized gains or losses included in net sales.

## Inventories

Materials and supplies are valued at weighted-average cost and are reviewed periodically for obsolescence. Oil, NGL and natural gas inventories are valued at the lower of cost or market.

For the chemical segment, Occidental's finished goods inventories are valued at the lower of cost or market. For most of its domestic inventories, other than materials and supplies, the chemical segment uses the last-in, first-out (LIFO) method as it better matches current costs and current revenue. For other countries, Occidental uses the first-in, first-out method (if the costs of goods are specifically identifiable) or the average-cost method (if the costs of goods are not specifically identifiable).

## PROPERTY, PLANT AND EQUIPMENT

## Oil and Gas

The carrying value of Occidental's property, plant and equipment (PP&E) represents the cost incurred to acquire or develop the asset, including any asset retirement obligations and capitalized interest, net of accumulated depreciation, depletion and amortization (DD&A) and net of any impairment charges. For assets acquired, PP&E cost is based on fair values at the acquisition date. Asset retirement obligations and interest costs incurred in connection with qualifying capital expenditures are capitalized and amortized over the lives of the related assets.

Occidental uses the successful efforts method to account for its oil and gas properties. Under this method, Occidental capitalizes costs of acquiring properties, costs of drilling successful exploration wells and development costs. The costs of exploratory wells are initially capitalized pending a determination of whether proved reserves have been found. If proved reserves have been found, the costs of exploratory wells remain capitalized. Otherwise, Occidental charges the costs of the related wells to expense. In some cases, a determination of proved reserves cannot be made at the completion of drilling, requiring additional testing and evaluation of the wells. Occidental generally expenses the costs of such exploratory wells if a determination of proved reserves has not been made within a 12-month period after drilling is complete.

The following table summarizes the activity of capitalized exploratory well costs for continuing operations for the years ended December 31:

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Balance — Beginning of Year</td><td>$ 182</td><td>$ 73</td><td>$ 51</td></tr><tr><td>Additions to capitalized exploratory well costs pending the determination of proved reserves</td><td>400</td><td>334</td><td>112</td></tr><tr><td>Reclassifications to property, plant and equipment based on the determination of proved reserves</td><td>(407)</td><td>(204)</td><td>(73)</td></tr><tr><td>Capitalized exploratory well costs charged to expense</td><td>(77)</td><td>(21)</td><td>(17)</td></tr><tr><td>Balance — End of Year</td><td>$ 98</td><td>$ 182</td><td>$ 73</td></tr></table>

Occidental expenses annual lease rentals and geological, geophysical and seismic costs as incurred.

Occidental expenses the costs of injectants used in production.

Occidental determines depreciation and depletion of oil and gas producing properties by the unit-of-production method. It amortizes acquisition costs over total proved reserves, and capitalized development and successful exploration costs over proved developed reserves.



Proved oil and gas reserves (as defined in the Securities and Exchange Commission's Regulation S-X, Rule 4-10(a)) are those quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible—from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations—prior to the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain, regardless of whether deterministic or probabilistic methods are used for the estimation. Occidental has no proved oil and gas reserves for which the determination of economic producibility is subject to the completion of major additional capital expenditures.

A portion of the carrying value of Occidental's oil and gas properties is attributable to unproved properties. At December 31, 2012, the net capitalized costs attributable to unproved properties were $4.8 billion. The unproved amounts are not subject to DD&A until they are classified as proved properties. As exploration and development work progresses, if reserves on these properties are proved, capitalized costs attributable to the properties become subject to DD&A. If the exploration and development work were to be unsuccessful, or management's plans changed with respect to these properties, as a result of economic, operating or contractual conditions, the capitalized costs of the related properties would be expensed. The timing of any writedowns of these unproved properties, if warranted, depends upon management's plans, the nature, timing and extent of future exploration and development activities and their results. Occidental believes its current plans and exploration and development efforts will allow it to realize its unproved property balance.

Additionally, Occidental performs impairment tests with respect to its proved properties generally when prices decline other than temporarily, reserve estimates change significantly or other significant events occur that may impact its ability to realize the recorded asset amounts. Impairment tests incorporate a number of assumptions involving expectations of future cash flows, which can change significantly over time. These assumptions include estimates of future product prices, which Occidental bases on forward price curves and, when applicable, contractual prices, estimates of oil and gas reserves and estimates of future expected operating and development costs.

Fluctuations in commodity prices and production and development costs could cause management's plans to change with respect to unproved properties and could cause the carrying values of proved properties to be unrealizable. Such circumstances could result in impairments in the carrying values of proved or unproved properties or both. Any impairment loss would be calculated as the excess of the asset's net book value over its estimated fair value.

## Chemical

Occidental's chemical assets are depreciated using either the unit-of-production or the straight-line method, based upon the estimated useful lives of the facilities. The estimated useful lives of Occidental's chemical assets, which range from three years to 50 years, are also used for impairment tests. The estimated useful lives for the chemical facilities are based on the assumption that Occidental will provide an appropriate level of annual expenditures to ensure productive capacity is sustained. Such expenditures consist of ongoing routine repairs and maintenance, as well as planned major maintenance activities (PMMA). Ongoing routine repairs and maintenance expenditures are expensed as incurred. PMMA costs are capitalized and amortized over the period until the next planned overhaul. Additionally, Occidental incurs capital expenditures that extend the remaining useful lives of existing assets, increase their capacity or operating efficiency beyond the original specification or add value through modification for a different use. These capital expenditures are not considered in the initial determination of the useful lives of these assets at the time they are placed into service. The resulting revision, if any, of the asset's estimated useful life is measured and accounted for prospectively.

Without these continued expenditures, the useful lives of these assets could decrease significantly. Other factors that could change the estimated useful lives of Occidental's chemical assets include sustained higher or lower product prices, which are particularly affected by both domestic and foreign competition, demand, feedstock costs, energy prices, environmental regulations and technological changes.

Occidental performs impairment tests on its chemical assets whenever events or changes in circumstances lead to a reduction in the estimated useful lives or estimated future cash flows that would indicate that the carrying amount may not be recoverable, or when management's plans change with respect to those assets. Any impairment loss would be calculated as the excess of the asset's net book value over its estimated fair value.

## Midstream and Marketing

Occidental’s midstream and marketing PP&E is depreciated over the estimated useful lives of the assets, using either the unit-of-production or straight-line method.

Occidental performs impairment tests on its midstream and marketing assets whenever events or changes in circumstances lead to a reduction in the estimated useful lives or estimated future cash flows that would indicate that the carrying amount may not be recoverable, or when management's plans change with respect to those assets. Any impairment loss would be calculated as the excess of the asset's net book value over its estimated fair value.

## FAIR VALUE MEASUREMENTS

Occidental has categorized its assets and liabilities that are measured at fair value in a three-level fair value hierarchy, based on the inputs to the valuation techniques: Level 1 – using quoted prices in active markets for identical assets or liabilities; Level 2 – using observable inputs other than quoted prices for identical assets or liabilities; and Level 3 – using unobservable inputs. Transfers between levels, if any, are reported at the end of each reporting period.



## Fair Values - Recurring

Occidental primarily applies the market approach for recurring fair value measurements, maximizes its use of observable inputs and minimizes its use of unobservable inputs. Occidental utilizes the mid-point price between bid and ask prices for valuing the majority of its assets and liabilities measured and reported at fair value. In addition to using market data, Occidental makes assumptions in valuing its assets and liabilities, including assumptions about the risks inherent in the inputs to the valuation technique. For assets and liabilities carried at fair value, Occidental measures fair value using the following methods:

Commodity derivatives – Occidental values exchange-cleared commodity derivatives using closing prices provided by the exchange as of the balance sheet date. These derivatives are classified as Level 1. Over-the-Counter (OTC) bilateral financial commodity contracts, foreign exchange contracts, options and physical commodity forward purchase and sale contracts are generally valued using quotations provided by brokers or industry-standard models that consider various inputs, including quoted forward prices for commodities, time value, volatility factors, credit risk and current market and contractual prices for the underlying instruments, as well as other relevant economic measures. Substantially all of these inputs are observable in the marketplace throughout the full term of the instrument and can be derived from observable data or are supported by observable prices at which transactions are executed in the marketplace. Occidental classifies these measurements as Level 2.

Embedded commodity derivatives – Occidental values embedded commodity derivatives based on a market approach that considers various assumptions, including quoted forward commodity prices and market yield curves. The assumptions used include inputs that are observable and unobservable in the marketplace, and the fair value is designated as Level 3 within the valuation hierarchy.

Occidental generally uses an income approach to measure fair value when there is not a market-observable price for an identical or similar asset or liability. This approach utilizes management's judgments regarding expectations of projected cash flows, and discounts those cash flows using a risk-adjusted discount rate.

## ACCRUED LIABILITIES—CURRENT

Accrued liabilities include accrued payroll, commissions and related expenses of $385 million and $462 million at December 31, 2012 and 2011, respectively.

## ENVIRONMENTAL LIABILITIES AND EXPENDITURES

Environmental expenditures that relate to current operations are expensed or capitalized as appropriate. Occidental records environmental reserves for estimated remediation costs that relate to existing conditions from past operations when environmental remediation efforts are probable and the costs can be reasonably estimated. In determining the reserves and the range of reasonably possible additional losses, Occidental refers to currently available information, including relevant past experience, remedial objectives, available technologies, applicable laws and regulations and cost-sharing arrangements. Occidental bases environmental reserves on management's estimate of the most likely cost to be incurred, using the most cost-effective technology reasonably expected to achieve the remedial objective. Occidental periodically reviews reserves and adjusts them as new information becomes available. Occidental records environmental reserves on a discounted basis when it deems the aggregate amount and timing of cash payments to be reliably determinable at the time the reserves are established. The reserve methodology with respect to discounting for a specific site is not modified once it is established. The amount of discounted environmental reserves is insignificant. Occidental generally records reimbursements or recoveries of environmental remediation costs in income when received, or when receipt of recovery is highly probable. As of December 31, 2012, 2011 and 2010, Occidental did not have any accruals for reimbursements or recoveries.

Many factors could affect Occidental’s future remediation costs and result in adjustments to its environmental reserves and range of reasonably possible additional losses. The most significant are: (1) cost estimates for remedial activities may be inaccurate; (2) the length of time, type or amount of remediation necessary to achieve the remedial objective may change due to factors such as site conditions, the ability to identify and control contaminant sources or the discovery of additional contamination; (3) a regulatory agency may ultimately reject or modify Occidental’s proposed remedial plan; (4) improved or alternative remediation technologies may change remediation costs; (5) laws and regulations may change remediation requirements or affect cost sharing or allocation of liability; and (6) changes in allocation or cost-sharing arrangements.

Certain sites involve multiple parties with various cost-sharing arrangements, which fall into the following three categories: (1) environmental proceedings that result in a negotiated or prescribed allocation of remediation costs among Occidental and other alleged potentially responsible parties; (2) oil and gas ventures in which each participant pays its proportionate share of remediation costs reflecting its working interest; or (3) contractual arrangements, typically relating to purchases and sales of properties, in which the parties to the transaction agree to methods of allocating remediation costs. In these circumstances, Occidental evaluates the financial viability of the other parties with whom it is alleged to be jointly liable, the degree of their commitment to participate and the consequences to Occidental of their failure to participate when estimating Occidental's ultimate share of liability. Occidental records reserves at its expected net cost of remedial activities and, based on these factors, believes that it will not be required to assume a share of liability of such other potentially responsible parties in an amount materially above amounts reserved.



In addition to the costs of investigations and cleanup measures, which often take in excess of 10 years at Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) National Priorities List (NPL) sites, Occidental's reserves include management's estimates of the costs to operate and maintain remedial systems. If remedial systems are modified over time in response to significant changes in site-specific data, laws, regulations, technologies or engineering estimates, Occidental reviews and adjusts its reserves accordingly.

## ASSET RETIREMENT OBLIGATIONS

Occidental recognizes the fair value of asset retirement obligations in the period in which a determination is made that a legal obligation exists to dismantle an asset and reclaim or remediate the property at the end of its useful life and the cost of the obligation can be reasonably estimated. The liability amounts are based on future retirement cost estimates and incorporate many assumptions such as time to abandonment, technological changes, future inflation rates and the risk-adjusted discount rate. When the liability is initially recorded, Occidental capitalizes the cost by increasing the related PP&E balances. If the estimated future cost of the asset retirement obligation changes, Occidental records an adjustment to both the asset retirement obligation and PP&E. Over time, the liability is increased and expense is recognized for accretion, and the capitalized cost is depreciated over the useful life of the asset.

At a certain number of its facilities, Occidental has identified conditional asset retirement obligations that are related mainly to plant decommissioning. Occidental believes that there is an indeterminate settlement date for these asset retirement obligations because the range of time over which Occidental may settle these obligations is unknown or cannot be estimated. Therefore, Occidental cannot reasonably estimate the fair value of these liabilities. Occidental will recognize these conditional asset retirement obligations in the periods in which sufficient information becomes available to reasonably estimate their fair values.

The following table summarizes the activity of the asset retirement obligation, of which $1,212 million and $1,030 million is included in deferred credits and other liabilities - other, with the remaining current portion in accrued liabilities at December 31, 2012 and 2011, respectively.

<table><tr><td>For the years ended December 31, (in millions)</td><td>2012</td><td>2011</td></tr><tr><td>Beginning balance</td><td>$ 1,089</td><td>$ 800</td></tr><tr><td>Liabilities incurred - capitalized to PP&amp;E</td><td>86</td><td>74</td></tr><tr><td>Liabilities settled and paid</td><td>(58)</td><td>(53)</td></tr><tr><td>Accretion expense</td><td>61</td><td>48</td></tr><tr><td>Acquisitions and other - capitalized to PP&amp;E</td><td>50</td><td>177</td></tr><tr><td>Revisions to estimated cash flows - capitalized to PP&amp;E</td><td>38</td><td>43</td></tr><tr><td>Ending balance</td><td>$ 1,266</td><td>$ 1,089</td></tr></table>

## DERIVATIVE INSTRUMENTS

Derivatives are carried at fair value and on a net basis when a legal right of offset exists with the same counterparty. Occidental applies hedge accounting when transactions meet specified criteria for cash-flow hedge treatment and management elects and documents such treatment. Otherwise, any fair value gains or losses are recognized in earnings in the current period. For cash-flow hedges, the gain or loss on the effective portion of the derivative is reported as a component of other comprehensive income (OCI) with an offsetting adjustment to the basis of the item being hedged. Realized gains or losses from cash-flow hedges, and any ineffective portion, are recorded as a component of net sales in the consolidated statements of income. Ineffectiveness is primarily created by a basis difference between the hedged item and the hedging instrument due to location, quality or grade of the physical commodity underlying the hedging instrument. Gains and losses from derivative instruments are reported net in the consolidated statements of income. There were no fair value hedges as of and during the years ended December 31, 2012, 2011 and 2010.

A hedge is regarded as highly effective such that it qualifies for hedge accounting if, at inception and throughout its life, it is expected that changes in the fair value or cash flows of the hedged item will be offset by 80 to 125 percent of the changes in the fair value or cash flows, respectively, of the hedging instrument. In the case of hedging a forecast transaction, the transaction must be probable and must present an exposure to variations in cash flows that could ultimately affect reported net income or loss. Occidental discontinues hedge accounting when it determines that a derivative has ceased to be highly effective as a hedge; when the hedged item matures or is sold or repaid; or when a forecast transaction is no longer deemed probable.

## STOCK-BASED INCENTIVE PLANS

Occidental has established several stockholder-approved stock-based incentive plans for certain employees and directors (Plans) that are more fully described in Note 12. A summary of Occidental's accounting policy for awards issued under the Plans follows.

For cash- and stock-settled restricted stock units or incentive award shares (RSUs), compensation value is initially measured on the grant date using the quoted market price of Occidental's common stock. For total shareholder return incentives (TSRIs), compensation value is initially measured on the grant date using estimated payout levels derived from



the Monte Carlo valuation model. Compensation expense for RSUs and TSRIs is recognized on a straight-line basis over the requisite service periods, which is generally over the awards' respective vesting or performance periods. Compensation expense for the cash-settled portion of TSRIs and related dividends is adjusted quarterly for any changes in the number of shares expected to be issued based on the performance criteria using the Monte Carlo valuation model. In addition, every quarter, compensation expense for the cash-settled portion of RSUs and TSRIs is adjusted for changes in the value of the underlying stock. All such performance or stock-price-related changes are recognized in periodic compensation expense. The stock-settled portion of all these awards is expensed using the initially measured compensation value.

## EARNINGS PER SHARE

Occidental's instruments containing rights to nonforfeitable dividends granted in stock-based payment transactions are considered participating securities prior to vesting and, therefore, have been included in the earnings allocations in computing basic and diluted EPS under the two-class method.

Basic EPS was computed by dividing net income attributable to common stock, net of income allocated to participating securities, by the weighted-average number of common shares outstanding during each period, net of treasury shares and including vested but unissued shares and share units. The computation of diluted EPS reflects the additional dilutive effect of stock options and unvested stock awards.

## RETIREMENT AND POSTRETIREMENT BENEFIT PLANS

Occidental recognizes the overfunded or underfunded amounts of its defined benefit pension and postretirement plans in its financial statements using a December 31 measurement date.

Occidental determines its defined benefit pension and postretirement benefit plan obligations based on various assumptions and discount rates. The discount rate assumptions used are meant to reflect the interest rate at which the obligations could effectively be settled on the measurement date. Occidental estimates the rate of return on assets with regard to current market factors but within the context of historical returns. Occidental funds and expenses negotiated pension increases for domestic union employees over the terms of the applicable collective bargaining agreements.

Pension and postretirement plan assets are measured at fair value. Common stock, preferred stock, publicly registered mutual funds, U.S. government securities and corporate bonds are valued using quoted market prices in active markets when available. When quoted market prices are not available, these investments are valued using pricing models with observable inputs from both active and non-active markets. Common and collective trusts are valued at the fund units' net asset value (NAV) provided by the issuer, which represents the quoted price in a non-active market. Short-term investment funds are valued at the fund units' NAV provided by the issuer.

## SUPPLEMENTAL CASH FLOW INFORMATION

Occidental paid United States federal, state and foreign income taxes for continuing operations of approximately $2.4 billion, $2.9 billion and $2.4 billion during the years ended December 31, 2012, 2011 and 2010, respectively. Occidental also paid production, property and other taxes of approximately $694 million, $635 million and $510 million during the years ended December 31, 2012, 2011 and 2010, respectively, substantially all of which was in the United States. Interest paid totaled approximately $190 million, $315 million and $161 million for the years 2012, 2011 and 2010, respectively. The 2011 interest paid included $154 million of debt extinguishment premiums.

## FOREIGN CURRENCY TRANSACTIONS

The functional currency applicable to all of Occidental's foreign oil and gas operations is the United States dollar since cash flows are denominated principally in United States dollars. In Occidental's other operations, Occidental's use of non-United States dollar functional currencies was not material for all years presented. The effect of exchange rates on transactions in foreign currencies is included in periodic income. Occidental reports the exchange rate differences arising from translating foreign currency denominated balance sheet accounts to the United States dollar as of the reporting date in other comprehensive income. Exchange-rate gains and losses for continuing operations were not material for all years presented.

## NOTE 2 ACQUISITIONS, DISPOSITIONS AND OTHER TRANSACTIONS

## 2012

During the year ended December 31, 2012, Occidental paid approximately $2.3 billion for domestic oil and gas properties in the Permian Basin, Williston Basin, South Texas and California.

In November 2012, Occidental and Magellan Midstream Partners, L.P. (Magellan) formed BridgeTex Pipeline Company, LLC (BridgeTex) and are proceeding with the construction of the BridgeTex Pipeline, which is expected to begin service in mid-2014. The approximately 450-mile-long pipeline will be capable of transporting approximately 300,000 barrels per day of crude oil between the Permian region (Colorado City, TX) and the Gulf Coast refinery markets. The BridgeTex Pipeline project also includes construction of approximately 2.6 million barrels of oil storage in aggregate.



Occidental owns a 50% interest in BridgeTex and the remaining 50% interest is owned by Magellan, which also serves as the operator. BridgeTex was determined to be a variable interest entity because of the difference between Occidental's economic interests and its decision-making rights. Occidental is the primary beneficiary and consequently consolidates BridgeTex. At December 31, 2012, BridgeTex held approximately $50 million of money market mutual funds, classified as cash equivalents, which approximates fair value using Level 1 inputs. BridgeTex's assets cannot be used for the obligations of, nor do BridgeTex's creditors have recourse to, OPC or its other subsidiaries.

## 2011

During the year ended December 31, 2011, Occidental acquired producing properties in South Texas for approximately $1.8 billion. Occidental also acquired approximately $2.6 billion of other domestic oil and gas assets, which included properties in California, as well as the Permian and Williston Basins.

In the first quarter of 2011, Occidental completed the sale of its Argentine oil and gas operations.

Internationally, in the first quarter of 2011, Occidental acquired a 40-percent participating interest in the Al Hosn gas project in Abu Dhabi, joining with the Abu Dhabi National Oil Company in a 30-year joint venture agreement. The project is operated by Abu Dhabi Gas Development Company Limited. In May 2011, Occidental paid approximately $500 million for its share of pre-acquisition development expenditures.

In early 2011, Occidental ceased exploration activity and its participation in production operations in Libya due to civil unrest in the country and United States sanctions. As a result, Occidental wrote off the entire amount of the capitalized and suspended exploration costs incurred to date, including lease acquisition costs, of approximately $35 million in the first quarter of 2011. The United States government lifted its sanctions in September 2011 and Occidental resumed its participation in the producing operations at that time.

## 2010

In December 2010, Occidental acquired oil producing and prospective properties in North Dakota for approximately $1.4 billion in cash. In 2010, Occidental also acquired various domestic oil and gas interests, in operated, producing and non-producing properties in the Permian Basin, Midcontinent region and California, for approximately $2.8 billion.

In December 2010, Occidental executed an agreement with a subsidiary of China Petrochemical Corporation (Sinopec) to sell its Argentine oil and gas operations for after-tax proceeds of approximately $2.6 billion. Occidental recorded a pre-tax gain of $225 million when the sale closed in February 2011. Net revenues and pre-tax income for discontinued operations related to Argentina were $97 million and $2 million, respectively, for the year ended December 31, 2011. Net revenues and pre-tax losses for such discontinued operations in 2010 were $700 million and $(39) million, respectively.

In December 2010, Occidental purchased additional noncontrolling interests in the general partner of Plains All-American Pipeline, L.P. (Plains Pipeline) for approximately $430 million, and now owns 35 percent of the general partner. In December 2010, Occidental also completed its acquisition of the remaining 50-percent joint venture interest in Elk Hills Power, LLC (EHP), a limited liability company that operates a gas-fired power-generation plant in California, for approximately $175 million, bringing Occidental's total ownership to 100 percent. EHP is now consolidated in Occidental's balance sheet.

In January 2010, Occidental and other consortium members signed a 20-year contract with the South Oil Company of Iraq to develop the Zubair Field in Iraq.

## NOTE 3 ACCOUNTING AND DISCLOSURE CHANGES

## RECENTLY ADOPTED ACCOUNTING AND DISCLOSURE CHANGES

## Fair Value Measurements

Beginning in the quarter ended March 31, 2012, Occidental enhanced its fair value measurement application and disclosures as a result of adopting new requirements issued by the Financial Accounting Standards Board in May 2011. The new rules include revisions to the standards for the use of fair value measurements and additional disclosures for: (i) all transfers between Level 1 and Level 2 of the fair value hierarchy; (ii) Level 3 measurements; and (iii) hierarchy classifications used for assets and liabilities whose fair value is disclosed only in the footnotes. The new rules did not have a material impact on Occidental.



Net carrying values of inventories valued under the LIFO method were approximately $185 million and $176 million at December 31, 2012 and 2011, respectively. Inventories consisted of the following:

<table><tr><td>Balance at December 31, (in millions)</td><td>2012</td><td>2011</td></tr><tr><td>Raw materials</td><td>$ 70</td><td>$ 69</td></tr><tr><td>Materials and supplies</td><td>612</td><td>443</td></tr><tr><td>Finished goods</td><td>763</td><td>655</td></tr><tr><td></td><td>1,445</td><td>1,167</td></tr><tr><td>LIFO reserve</td><td>(101)</td><td>(98)</td></tr><tr><td>Total</td><td>$ 1,344</td><td>$ 1,069</td></tr></table>

## NOTE 5 LONG-TERM DEBT

Long-term debt consisted of the following:

<table><tr><td>Balance at December 31, (in millions)</td><td>2012</td><td>2011</td></tr><tr><td>4.10% senior notes due 2021</td><td>$ 1,300</td><td>$ 1,300</td></tr><tr><td>1.75% senior notes due 2017</td><td>1,250</td><td>1,250</td></tr><tr><td>2.70% senior notes due 2023</td><td>1,250</td><td>—</td></tr><tr><td>3.125% senior notes due 2022</td><td>900</td><td>900</td></tr><tr><td>4.125% senior notes due 2016</td><td>750</td><td>750</td></tr><tr><td>2.5% senior notes due 2016</td><td>700</td><td>700</td></tr><tr><td>1.45% senior notes due 2013</td><td>600</td><td>600</td></tr><tr><td>1.50% senior notes due 2018</td><td>500</td><td>—</td></tr><tr><td>8.45% senior notes due 2029</td><td>116</td><td>116</td></tr><tr><td>9.25% senior debentures due 2019</td><td>116</td><td>116</td></tr><tr><td>7.2% senior debentures due 2028</td><td>82</td><td>82</td></tr><tr><td>Variable rate bonds due 2030 (0.13% and 0.11% as of December 31, 2012 and 2011, respectively)</td><td>68</td><td>68</td></tr><tr><td>8.75% medium-term notes due 2023</td><td>22</td><td>22</td></tr><tr><td></td><td>7,654</td><td>5,904</td></tr><tr><td>Less:</td><td></td><td></td></tr><tr><td>Unamortized discount, net</td><td>(31)</td><td>(33)</td></tr><tr><td>Current maturities</td><td>(600)</td><td>—</td></tr><tr><td>Total</td><td>$ 7,023</td><td>$ 5,871</td></tr></table>

Occidental has a bank credit facility (Credit Facility) with a $2.0 billion commitment expiring in 2016. No amounts have been drawn under this Credit Facility. Up to $1.0 billion of the Credit Facility is available in the form of letters of credit. Borrowings under the Credit Facility bear interest at various benchmark rates, including LIBOR, plus a margin based on Occidental's senior debt ratings. Additionally, Occidental paid average annual facility fees of 0.08 percent in 2012 on the total commitment amounts of the Credit Facility.

The Credit Facility provides for the termination of loan commitments and requires immediate repayment of any outstanding amounts if certain events of default occur. The Credit Facility and other debt agreements do not contain material adverse change clauses or debt ratings triggers that could restrict Occidental's ability to borrow or that would permit lenders to terminate their commitments or accelerate debt.

As of December 31, 2012, under the most restrictive covenants of its financing agreements, Occidental had substantial capacity for additional unsecured borrowings, the payment of cash dividends and other distributions on, or acquisitions of, Occidental stock.

In June 2012, Occidental issued $1.75 billion of debt which comprised $1.25 billion of 2.70-percent senior unsecured notes due 2023 and $500 million of 1.50-percent senior unsecured notes due 2018. Occidental received net proceeds of approximately $1.74 billion. Interest on the notes will be payable semi-annually in arrears in February and August for each series of notes.

In August 2011, Occidental issued $2.15 billion of debt, which comprised $1.25 billion of 1.75-percent senior unsecured notes due 2017 and $900 million of 3.125-percent senior unsecured notes due 2022. Occidental received net proceeds of approximately $2.1 billion. Interest on the notes is payable semi-annually in arrears in February and August for each series of notes.



In March 2011, Occidental redeemed all $1.0 billion of its outstanding 7-percent senior notes due 2013 and all $368 million of its outstanding 6.75-percent senior notes due 2012. Occidental recorded a $163 million pre-tax charge related to this redemption in the first quarter of 2011.

In December 2010, Occidental issued $2.6 billion of debt, which comprised $600 million of 1.45-percent senior unsecured notes due 2013, $700 million of 2.50-percent senior unsecured notes due 2016 and $1.3 billion of 4.10-percent senior unsecured notes due 2021. Occidental received net proceeds of approximately $2.6 billion. Interest on the notes is payable semi-annually in arrears in June and December of each year for the 1.45-percent notes and February and August of each year for the other notes.

Occidental has provided guarantees on Dolphin Energy’s debt, which are limited to certain political and other events. At December 31, 2012 and 2011, Occidental’s total guarantees were not material and a substantial majority of the amounts consisted of limited recourse guarantees on approximately $370 million and $300 million, respectively, of Dolphin’s debt, of which the fair value was immaterial.

At December 31, 2012, principal payments on long-term debt aggregated $7.6 billion, of which $0.6 billion is due in 2013, $0.0 billion in 2014, $0.0 billion in 2015, $1.4 billion in 2016, $1.2 billion in 2017 and $4.4 billion in 2018 and thereafter.

Occidental estimates the fair value of fixed-rate debt based on the quoted market prices for those instruments or on quoted market yields for similarly rated debt instruments, taking into account such instruments' maturities. The estimated fair values of Occidental's debt at December 31, 2012 and 2011, which were classified as Level 1, were approximately $8.2 billion and $6.4 billion, respectively, compared to carrying values of approximately $7.6 billion and $5.9 billion, respectively. Occidental's exposure to changes in interest rates relates primarily to its variable-rate, long-term debt obligations, and is not material. As of December 31, 2012 and 2011, variable-rate debt constituted approximately 1 percent of Occidental's total debt.

## NOTE 6 LEASE COMMITMENTS

Operating lease agreements include leases for transportation equipment, power plants, machinery, terminals, storage facilities, land and office space. Occidental’s operating lease agreements frequently include renewal or purchase options and require it to pay for utilities, taxes, insurance and maintenance expense. At December 31, 2012, future net minimum lease payments for noncancelable operating leases (excluding oil and gas and other mineral leases, utilities, taxes, insurance and maintenance expense) were the following:

<table><tr><td>In millions</td><td>Amount \( ^{(a)} \)</td></tr><tr><td>2013</td><td>158</td></tr><tr><td>2014</td><td>105</td></tr><tr><td>2015</td><td>106</td></tr><tr><td>2016</td><td>88</td></tr><tr><td>2017</td><td>59</td></tr><tr><td>Thereafter</td><td>460</td></tr><tr><td>Total minimum lease payments</td><td>976</td></tr></table>

(a) These amounts are net of sublease rentals of $3 million, which are to be received as follows (in millions): 2013—$2 and 2014—$1.

Rental expense for operating leases, net of sublease rental income for continuing operations, was $176 million in 2012, $179 million in 2011 and $170 million in 2010. Rental expense was net of sublease income of $4 million each in 2012, 2011 and 2010.

## NOTE 7 DERIVATIVES

## Objective & Strategy

Occidental uses a variety of derivative instruments, including cash-flow hedges and derivative instruments not designated as hedging instruments, to establish, as of the date of production, the price it receives and to improve realized prices for oil and gas. Occidental only occasionally hedges its oil and gas production and, when it does, the volumes are usually insignificant. Additionally, Occidental's Phibro trading unit engages in trading activities using derivatives for the purpose of generating profits mainly from market price changes of commodities.

Refer to Note 1 for Occidental's accounting policy on derivatives.



## Cash-Flow Hedges

Occidental entered into financial swap agreements in November 2012 for the sale of a portion of its natural gas production in California. These swap agreements hedge 50 million cubic feet of natural gas per day beginning in January 2013 through March 2014 and qualify as cash-flow hedges. The weighted-average strike price of these swaps was $4.30.

Through March 31, 2012, Occidental held financial swap agreements related to the sale of 50 million cubic feet per day of its existing natural gas production from the Rocky Mountain region of the United States that qualified as cash-flow hedges at a weighted-average strike price of $6.07.

Through December 31, 2011, Occidental held a series of collar agreements for 12,000 barrels of oil per day of its domestic production that qualified as cash-flow hedges at a weighted-average strike price that ranged from $32.92 to $46.35.

Occidental’s marketing and trading operations store natural gas purchased from third parties at Occidental’s North American leased storage facilities. Derivative instruments are used to fix margins on the future sales of the stored volumes through March 31, 2013. As of December 31, 2012 and 2011, Occidental had approximately 20 billion cubic feet and 25 billion cubic feet of natural gas held in storage, respectively. As of December 31, 2012 and 2011, Occidental had cash-flow hedges for the forecast sale, to be settled by physical delivery, of approximately 20 billion cubic feet and 35 billion cubic feet of this stored natural gas, respectively.

The following table presents the pre-tax and after-tax gains and losses recognized in, and reclassified to income from, AOCI, for derivative instruments classified as cash-flow hedges for the years ended December 31, 2012 and 2011 (in millions):

<table><tr><td rowspan="2"></td><td colspan="3">After-tax</td><td colspan="2">Pre-Tax</td></tr><tr><td>2012</td><td>2011</td><td>2012</td><td>2011</td><td></td></tr><tr><td>Beginning Balance — AOCI</td><td>$ 1</td><td>$ (111)</td><td></td><td></td><td></td></tr><tr><td>Unrealized gains recognized in AOCI</td><td>16</td><td>14</td><td>$ 25</td><td>$ 20</td><td></td></tr><tr><td>(Gains) losses reclassified to income</td><td>(24)</td><td>98</td><td>$ (38)</td><td>$ 154</td><td></td></tr><tr><td>Ending Balance — AOCI</td><td>$ (7)</td><td>$ 1</td><td></td><td></td><td></td></tr></table>

Occidental expects that during the next twelve months an insignificant amount of net after-tax derivative losses included in AOCI based on their valuation as of December 31, 2012, will be reclassified into income. The gains and losses reclassified to income were recognized in net sales, and the amount of the ineffective portion of cash-flow hedges was immaterial for the years ended December 31, 2012 and 2011.

## Derivatives Not Designated as Hedging Instruments

The following table summarizes Occidental’s net volumes resulting from outstanding commodity derivatives contracts not designated as hedging instruments, including both financial and physical derivative contracts as of December 31, 2012 and 2011:

<table><tr><td rowspan="2"></td><td colspan="2">Net Outstanding Position Long / (Short)</td></tr><tr><td>2012</td><td>2011</td></tr><tr><td>Oil (million barrels)</td><td>(17)</td><td>(9)</td></tr><tr><td>Natural gas (billion cubic feet)</td><td>(217)</td><td>(242)</td></tr><tr><td>Precious metals (million troy ounces)</td><td>1</td><td>3</td></tr></table>

In addition, Occidental typically has certain other commodity trading contracts, such as agricultural products, power and other metals, as well as foreign exchange contracts. These contracts were not material to Occidental as of December 31, 2012 and 2011.

Occidental fulfills its short positions through its own production or by third-party purchase contracts. Subsequent to December 31, 2012, Occidental entered into purchase contracts for a substantial portion of the outstanding positions at year-end and has sufficient production capacity and the ability to enter into additional purchase contracts to satisfy the remaining positions.

Approximately $49 million and $94 million of net gains from derivatives not designated as hedging instruments were recognized in net sales for the years ended December 31, 2012 and 2011, respectively.



## Fair Value of Derivatives

The following table presents the gross fair value of Occidental's outstanding derivatives as of December 31, 2012 and 2011 (in millions):

<table><tr><td>December 31, 2012</td><td>Asset Derivatives Balance Sheet Location</td><td>Fair Value</td><td>Liability Derivatives Balance Sheet Location</td><td>Fair Value</td></tr><tr><td>Cash-flow hedges (a)</td><td></td><td></td><td></td><td></td></tr><tr><td rowspan="2">Commodity contracts</td><td>Other current assets</td><td>$ 11</td><td>Accrued liabilities</td><td>$ 1</td></tr><tr><td>Long-term receivables and other assets, net</td><td>—</td><td>Deferred credits and other liabilities</td><td>1</td></tr><tr><td></td><td></td><td>$ 11</td><td></td><td>$ 2</td></tr><tr><td>Derivatives not designated as hedging instruments (a)</td><td></td><td></td><td></td><td></td></tr><tr><td rowspan="2">Commodity contracts</td><td>Other current assets</td><td>$ 386</td><td>Accrued liabilities</td><td>$ 479</td></tr><tr><td>Long-term receivables and other assets, net</td><td>22</td><td>Deferred credits and other liabilities</td><td>16</td></tr><tr><td></td><td></td><td>408</td><td></td><td>495</td></tr><tr><td>Total gross fair value</td><td></td><td>419</td><td></td><td>497</td></tr><tr><td>Less: counterparty netting and cash collateral (b)</td><td></td><td>(301)</td><td></td><td>(371)</td></tr><tr><td>Total net fair value of derivatives</td><td></td><td>$ 118</td><td></td><td>$ 126</td></tr></table>

<table><tr><td>December 31, 2011</td><td>Asset Derivatives Balance Sheet Location</td><td>Fair Value</td><td>Liability Derivatives Balance Sheet Location</td><td>Fair Value</td></tr><tr><td>Cash-flow hedges (a)</td><td></td><td></td><td></td><td></td></tr><tr><td rowspan="2">Commodity contracts</td><td>Other current assets</td><td>$ 41</td><td>Accrued liabilities</td><td>$ 5</td></tr><tr><td>Long-term receivables and other assets, net</td><td>3</td><td>Deferred credits and other liabilities</td><td>—</td></tr><tr><td></td><td></td><td>$ 44</td><td></td><td>$ 5</td></tr><tr><td>Derivatives not designated as hedging instruments (a)</td><td></td><td></td><td></td><td></td></tr><tr><td rowspan="2">Commodity contracts</td><td>Other current assets</td><td>$ 835</td><td>Accrued liabilities</td><td>$ 887</td></tr><tr><td>Long-term receivables and other assets, net</td><td>71</td><td>Deferred credits and other liabilities</td><td>71</td></tr><tr><td></td><td></td><td>906</td><td></td><td>958</td></tr><tr><td>Total gross fair value</td><td></td><td>950</td><td></td><td>963</td></tr><tr><td>Less: counterparty netting and cash collateral (c)</td><td></td><td>(758)</td><td></td><td>(782)</td></tr><tr><td>Total net fair value of derivatives</td><td></td><td>$ 192</td><td></td><td>$ 181</td></tr></table>

(a) Fair values are presented at gross amounts, including when the derivatives are subject to master netting arrangements and qualify for net presentation in the consolidated balance sheet.

(b) As of December 31, 2012, collateral received of $25 million has been netted against derivative assets and collateral paid of $95 million has been netted against derivative liabilities.

(c) As of December 31, 2011, collateral received of $42 million has been netted against derivative assets and collateral paid of $66 million has been netted against derivative liabilities.

See Note 15 for fair value measurement disclosures on derivatives.



## Credit Risk

A substantial portion of Occidental's derivative transaction volume is executed through exchange-traded contracts, which are subject to nominal credit risk as a significant portion of these transactions is settled on a daily margin basis with select clearinghouses and brokers. Collateral of $116 million and $173 million deposited by Occidental for such contracts, which has not been reflected in the derivative fair value tables, is included in the other current assets balance as of December 31, 2012 and 2011, respectively.

Occidental executes the rest of its derivative transactions in the OTC market. Occidental is subject to counterparty credit risk to the extent the counterparty to the derivatives is unable to meet its settlement commitments. Occidental manages this credit risk by selecting counterparties that it believes to be financially strong, by spreading the credit risk among many such counterparties, by entering into master netting arrangements with the counterparties and by requiring collateral, as appropriate. Occidental actively monitors the creditworthiness of each counterparty and records valuation adjustments to reflect counterparty risk, if necessary.

Certain of Occidental's OTC derivative instruments contain credit-risk-contingent features, primarily tied to credit ratings for Occidental or its counterparties, which may affect the amount of collateral that each would need to post. As of December 31, 2012 and 2011, Occidental had a net liability of $34 million and $58 million, respectively, which are net of collateral posted of $64 million and $27 million, respectively. Occidental believes that if it had received a one-notch reduction in its credit ratings, it would not have resulted in a material change in its collateral-posting requirements as of December 31, 2012 and 2011.

## Foreign Currency Risk

Occidental’s foreign operations have limited currency risk. Occidental manages its exposure primarily by balancing monetary assets and liabilities and limiting cash positions in foreign currencies to levels necessary for operating purposes. A vast majority of international oil sales are denominated in United States dollars. Additionally, all of Occidental’s consolidated foreign oil and gas subsidiaries have the United States dollar as the functional currency.

## NOTE 8 ENVIRONMENTAL LIABILITIES AND EXPENDITURES

Occidental’s operations are subject to stringent federal, state, local and foreign laws and regulations related to improving or maintaining environmental quality.

## ENVIRONMENTAL REMEDIATION

The laws that require or address environmental remediation, including CERCLA and similar federal, state, local and foreign laws, may apply retroactively and regardless of fault, the legality of the original activities or the current ownership or control of sites. OPC or certain of its subsidiaries participate in or actively monitor a range of remedial activities and government or private proceedings under these laws with respect to alleged past practices at operating, closed and third-party sites. Remedial activities may include one or more of the following: investigation involving sampling, modeling, risk assessment or monitoring; cleanup measures including removal, treatment or disposal; or operation and maintenance of remedial systems. The environmental proceedings seek funding or performance of remediation and, in some cases, compensation for alleged property damage, punitive damages, civil penalties, injunctive relief and government oversight costs.

As of December 31, 2012, Occidental participated in or monitored remedial activities or proceedings at 161 sites. The following table presents Occidental's environmental remediation reserves as of December 31, 2012, 2011 and 2010, the current portion of which is included in accrued liabilities ($80 million in 2012, $79 million in 2011 and $79 million in 2010) and the remainder in deferred credits and other liabilities — other ($264 million in 2012, $281 million in 2011 and $287 million in 2010). The reserves are grouped as environmental remediation sites listed or proposed for listing by the U.S. Environmental Protection Agency on the CERCLA National Priorities List (NPL sites) and three categories of non-NPL sites — third-party sites, Occidental-operated sites and closed or non-operated Occidental sites.

<table><tr><td rowspan="2">$ amounts in millions</td><td colspan="2">2012</td><td colspan="2">2011</td><td colspan="2">2010</td></tr><tr><td>Number of Sites</td><td>Reserve Balance</td><td>Number of Sites</td><td>Reserve Balance</td><td>Number of Sites</td><td>Reserve Balance</td></tr><tr><td>NPL sites</td><td>35</td><td>$ 54</td><td>36</td><td>$ 63</td><td>38</td><td>$ 56</td></tr><tr><td>Third-party sites</td><td>75</td><td>84</td><td>73</td><td>88</td><td>83</td><td>91</td></tr><tr><td>Occidental-operated sites</td><td>22</td><td>123</td><td>22</td><td>120</td><td>20</td><td>122</td></tr><tr><td>Closed or non-operated Occidental sites</td><td>29</td><td>83</td><td>29</td><td>89</td><td>29</td><td>97</td></tr><tr><td>Total</td><td>161</td><td>$ 344</td><td>160</td><td>$ 360</td><td>170</td><td>$ 366</td></tr></table>

As of December 31, 2012, Occidental's environmental reserves exceeded $10 million each at 12 of the 161 sites described above, and 112 of the sites had reserves from $0 to $1 million each.

As of December 31, 2012, two landfills in western New York owned by Occidental accounted for 73 percent of its reserves associated with NPL sites. In connection with a 1986 acquisition, Maxus Energy Corporation has retained the liability and indemnified Occidental for 14 of the remaining NPL sites.



As of December 31, 2012, Maxus has also retained the liability and indemnified Occidental for 8 of the 75 third-party sites. Two of the remaining 67 third-party sites — a former copper mining and smelting operation in Tennessee and a containment and removal project in Tennessee — accounted for 43 percent of Occidental's reserves associated with these sites.

Five sites — chemical plants in Kansas, Louisiana, Texas and New York and a group of oil and gas properties in the southwestern United States — accounted for 70 percent of the reserves associated with the Occidental-operated sites.

Three other sites — former chemical plants in Tennessee and Delaware and a closed coal mine in Pennsylvania — accounted for 55 percent of the reserves associated with closed or non-operated Occidental sites.

Environmental reserves vary over time depending on factors such as acquisitions or dispositions, identification of additional sites and remedy selection and implementation. The following table presents environmental reserve activity for the past three years:

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Balance — Beginning of Year</td><td>$ 360</td><td>$ 366</td><td>$ 403</td></tr><tr><td>Remediation expenses and interest accretion</td><td>56</td><td>53</td><td>26</td></tr><tr><td>Changes from acquisitions/dispositions</td><td>—</td><td>14</td><td>3</td></tr><tr><td>Payments</td><td>(72)</td><td>(73)</td><td>(66)</td></tr><tr><td>Balance — End of Year</td><td>$ 344</td><td>$ 360</td><td>$ 366</td></tr></table>

Based on current estimates, Occidental expects to expend funds corresponding to approximately half of the current environmental reserves at the sites described above over the next four years and the balance at these sites over the subsequent 10 or more years. Occidental believes its range of reasonably possible additional losses beyond those liabilities recorded for environmental remediation at these sites could be up to $375 million.

## ENVIRONMENTAL COSTS

Occidental’s environmental costs, some of which include estimates, are presented below for each segment for each of the years ended December 31:

<table><tr><td>In millions</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Operating Expenses</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas</td><td>$ 160</td><td>$ 158</td><td>$ 108</td></tr><tr><td>Chemical</td><td>70</td><td>68</td><td>72</td></tr><tr><td>Midstream and Marketing</td><td>20</td><td>21</td><td>13</td></tr><tr><td></td><td>$ 250</td><td>$ 247</td><td>$ 193</td></tr><tr><td>Capital Expenditures</td><td></td><td></td><td></td></tr><tr><td>Oil and Gas</td><td>$ 122</td><td>$ 110</td><td>$ 72</td></tr><tr><td>Chemical</td><td>18</td><td>15</td><td>19</td></tr><tr><td>Midstream and Marketing</td><td>12</td><td>15</td><td>13</td></tr><tr><td></td><td>$ 152</td><td>$ 140</td><td>$ 104</td></tr><tr><td>Remediation Expenses</td><td></td><td></td><td></td></tr><tr><td>Corporate</td><td>$ 56</td><td>$ 52</td><td>$ 25</td></tr></table>

Operating expenses are incurred on a continual basis. Capital expenditures relate to longer-lived improvements in currently operating properties. Remediation expenses relate to existing conditions from past operations.

## NOTE 9 LAWSUITS, CLAIMS, COMMITMENTS AND CONTINGENCIES

OPC or certain of its subsidiaries are involved, in the normal course of business, in lawsuits, claims and other legal proceedings that seek, among other things, compensation for alleged personal injury, breach of contract, property damage or other losses, punitive damages, civil penalties, or injunctive or declaratory relief. OPC or certain of its subsidiaries also are involved in proceedings under CERCLA and similar federal, state, local and foreign environmental laws. These environmental proceedings seek funding or performance of remediation and, in some cases, compensation for alleged property damage, punitive damages, civil penalties and injunctive relief. Usually OPC or such subsidiaries are among many companies in these environmental proceedings and have to date been successful in sharing response costs with other financially sound companies. Further, some lawsuits, claims and legal proceedings involve acquired assets with respect to which third-parties retain liability or indemnify Occidental for conditions that existed prior to purchase.

Occidental accrues reserves for currently outstanding lawsuits, claims and proceedings when it is probable that a liability has been incurred and the liability can be reasonably estimated. Occidental has disclosed its reserve balances for environmental matters. Reserve balances for other matters as of December 31, 2012 and 2011, were not material to



Occidental's consolidated balance sheets. Occidental also evaluates the amount of reasonably possible losses that it could incur as a result of the matters mentioned above. Occidental has disclosed its range of reasonably possible additional losses for sites where it is a participant in environmental remediation. Occidental believes that other reasonably possible losses that it could incur in excess of reserves accrued on the balance sheet would not be material to its consolidated financial position or results of operations.

During the course of its operations, Occidental is subject to audit by tax authorities for varying periods in various federal, state, local and foreign tax jurisdictions. Although taxable years through 2009 for United States federal income tax purposes have been audited by the United States Internal Revenue Service (IRS) pursuant to its Compliance Assurance Program, subsequent taxable years are currently under review. Additionally, in December 2012, Occidental filed United States federal refund claims for tax years 2008 and 2009 which are subject to IRS review. Taxable years from 2000 through the current year remain subject to examination by foreign and state government tax authorities in certain jurisdictions. In certain of these jurisdictions, tax authorities are in various stages of auditing Occidental's income taxes. During the course of tax audits, disputes have arisen and other disputes may arise as to facts and matters of law. Occidental believes that the resolution of outstanding tax matters would not have a material adverse effect on its consolidated financial position or results of operations.

OPC, its subsidiaries or both have entered into agreements providing for future payments to secure terminal and pipeline capacity, drilling rigs and services, electrical power, steam and certain chemical raw materials. Occidental has certain other commitments under contracts, guarantees and joint ventures, including purchase commitments for goods and services at market-related prices and certain other contingent liabilities. At December 31, 2012, total purchase obligations were $8.7 billion, which included approximately $2.7 billion, $1.4 billion, $700 million, $500 million and $400 million that will be paid in 2013, 2014, 2015, 2016 and 2017, respectively. Included in the purchase obligations are commitments for major fixed and determinable capital expenditures during 2013 and thereafter, which were approximately $2.2 billion.

OPC, its subsidiaries or both have indemnified various parties against specified liabilities those parties might incur in the future in connection with purchases and other transactions that they have entered into with Occidental. These indemnities usually are contingent upon the other party incurring liabilities that reach specified thresholds. As of December 31, 2012, Occidental is not aware of circumstances that it believes would reasonably be expected to lead to indemnity claims that would result in payments materially in excess of reserves.

## NOTE 10 DOMESTIC AND FOREIGN INCOME TAXES

The domestic and foreign components of income from continuing operations before domestic and foreign income taxes and net of noncontrolling interest amounts were as follows:

<table><tr><td colspan="3">For the years ended December 31, (in millions)</td><td colspan="2">Domestic</td><td colspan="2">Foreign</td><td>Total</td></tr><tr><td>2012</td><td></td><td></td><td>$ 2,117</td><td>(a)</td><td>$ 5,636</td><td></td><td>$ 7,753</td></tr><tr><td>2011</td><td></td><td></td><td>$ 4,806</td><td></td><td>$ 6,035</td><td></td><td>$ 10,841</td></tr><tr><td>2010</td><td></td><td></td><td>$ 3,295</td><td></td><td>$ 4,269</td><td></td><td>$ 7,564</td></tr></table>

(a) Includes pre-tax charges of $1.8 billion for the impairment of domestic gas assets and related items.

The provisions (credits) for domestic and foreign income taxes on continuing operations consisted of the following:

<table><tr><td colspan="2">For the years ended December 31, (in millions)</td><td>United States Federal</td><td>State and Local</td><td>Foreign</td><td>Total</td></tr><tr><td>2012</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Current</td><td></td><td>$ (401)</td><td>$ 8</td><td>$ 2,383</td><td>$ 1,990</td></tr><tr><td>Deferred</td><td></td><td>1,046</td><td>41</td><td>41</td><td>1,128</td></tr><tr><td></td><td></td><td>$ 645</td><td>$ 49</td><td>$ 2,424</td><td>$ 3,118</td></tr><tr><td>2011</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Current</td><td></td><td>$ 320</td><td>$ 88</td><td>$ 2,357</td><td>$ 2,765</td></tr><tr><td>Deferred</td><td></td><td>1,340</td><td>47</td><td>49</td><td>1,436</td></tr><tr><td></td><td></td><td>$ 1,660</td><td>$ 135</td><td>$ 2,406</td><td>$ 4,201</td></tr><tr><td>2010</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Current</td><td></td><td>$ 614</td><td>$ 79</td><td>$ 1,896</td><td>$ 2,589</td></tr><tr><td>Deferred</td><td></td><td>390</td><td>4</td><td>12</td><td>406</td></tr><tr><td></td><td></td><td>$ 1,004</td><td>$ 83</td><td>$ 1,908</td><td>$ 2,995</td></tr></table>



The following reconciliation of the United States federal statutory income tax rate to Occidental’s worldwide effective tax rate on income from continuing operations is stated as a percentage of pre-tax income:

<table><tr><td>For the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>United States federal statutory tax rate</td><td>35%</td><td>35%</td><td>35%</td></tr><tr><td>Operations outside the United States</td><td>5</td><td>4</td><td>5</td></tr><tr><td>State income taxes, net of federal benefit</td><td>1</td><td>1</td><td>1</td></tr><tr><td>Other</td><td>(1)</td><td>(1)</td><td>(1)</td></tr><tr><td>Worldwide effective tax rate</td><td>40%</td><td>39%</td><td>40%</td></tr></table>

The tax effects of temporary differences resulting in deferred income taxes at December 31, 2012 and 2011 were as follows:

<table><tr><td rowspan="2">Tax effects of temporary differences (in millions)</td><td colspan="2">2012</td><td colspan="2">2011</td></tr><tr><td>Deferred Tax Assets</td><td>Deferred Tax Liabilities</td><td>Deferred Tax Assets</td><td>Deferred Tax Liabilities</td></tr><tr><td>Property, plant and equipment differences</td><td>$ —</td><td>$ 7,316</td><td>$ —</td><td>$ 6,039</td></tr><tr><td>Equity investments, partnerships and foreign subsidiaries</td><td>—</td><td>351</td><td>—</td><td>351</td></tr><tr><td>Environmental reserves</td><td>126</td><td>—</td><td>131</td><td>—</td></tr><tr><td>Postretirement benefit accruals</td><td>413</td><td>—</td><td>410</td><td>—</td></tr><tr><td>Deferred compensation and benefits</td><td>278</td><td>—</td><td>286</td><td>—</td></tr><tr><td>Asset retirement obligations</td><td>367</td><td>—</td><td>318</td><td>—</td></tr><tr><td>Foreign tax credit carryforwards</td><td>1,277</td><td>—</td><td>1,240</td><td>—</td></tr><tr><td>Other tax credit carryforwards</td><td>195</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Federal benefit of state income taxes</td><td>89</td><td>—</td><td>104</td><td>—</td></tr><tr><td>All other</td><td>334</td><td>161</td><td>374</td><td>116</td></tr><tr><td>Subtotal</td><td>3,079</td><td>7,828</td><td>2,863</td><td>6,506</td></tr><tr><td>Valuation allowance</td><td>(1,040)</td><td>—</td><td>(1,003)</td><td>—</td></tr><tr><td>Total deferred taxes</td><td>$ 2,039</td><td>$ 7,828</td><td>$ 1,860</td><td>$ 6,506</td></tr></table>

Included in total deferred tax assets was a current portion aggregating $250 million and $200 million as of December 31, 2012 and 2011, respectively, that was reported in other current assets. Total deferred tax assets were $2.0 billion and $1.9 billion as of December 31, 2012 and 2011, respectively, the noncurrent portion of which is netted against deferred tax liabilities. Occidental expects to realize the recorded deferred tax assets, net of any allowances, through future operating income and reversal of temporary differences.

Occidental had, as of December 31, 2012, foreign tax credit carryforwards of $1.3 billion, which expire in varying amounts through 2022, and various state operating loss carryforwards, which have varying carryforward periods through 2025. Substantially all of Occidental's valuation allowance is provided for foreign tax credit and state operating loss carryforwards.

A deferred tax liability has not been recognized for temporary differences related to unremitted earnings of certain consolidated foreign subsidiaries aggregating approximately $8.1 billion at December 31, 2012, as it is Occidental's intention, generally, to reinvest such earnings permanently. If the earnings of these foreign subsidiaries were not indefinitely reinvested, an additional deferred tax liability of approximately $116 million would be required, assuming utilization of available foreign tax credits.

Discontinued operations include income tax charges of $7 million and $86 million in 2012 and 2011, respectively, and income tax benefits of $26 million in 2010.

Additional paid-in capital was credited $8 million in 2012, $14 million in 2011 and $22 million in 2010 for an excess tax benefit from the exercise of certain stock-based compensation awards.

As of December 31, 2012, Occidental had liabilities for unrecognized tax benefits of approximately $76 million included in deferred credits and other liabilities – other, all of which, if subsequently recognized, would favorably affect Occidental's effective tax rate.



A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

<table><tr><td>For the years ended December 31, (in millions)</td><td>2012</td><td>2011</td></tr><tr><td>Balance at January 1,</td><td>$ 67</td><td>$ 38</td></tr><tr><td>Additions based on tax positions related to the current year</td><td>16</td><td>44</td></tr><tr><td>Reductions based on tax positions related to prior years and settlements</td><td>(7)</td><td>(15)</td></tr><tr><td>Balance at December 31,</td><td>$ 76</td><td>$ 67</td></tr></table>

Occidental records estimated potential interest and penalties related to liabilities for unrecognized tax benefits in the provisions for domestic and foreign income taxes and these amounts were not material for the years ended December 31, 2012, 2011 and 2010.

Occidental is subject to audit by various tax authorities in varying periods. See Note 9 for a discussion of these matters.

Management believes it is unlikely that Occidental’s liabilities for unrecognized tax benefits related to existing matters would increase or decrease within the next twelve months by a material amount. Occidental cannot reasonably estimate a range of potential changes in such benefits due to the unresolved nature of the various audits.

## NOTE 11 STOCKHOLDERS' EQUITY

The following is a summary of common stock issuances:

<table><tr><td>Shares in thousands</td><td>Common Stock</td></tr><tr><td>Balance, December 31, 2009</td><td>883,643</td></tr><tr><td>Issued</td><td>967</td></tr><tr><td>Options exercised and other, net</td><td>665</td></tr><tr><td>Balance, December 31, 2010</td><td>885,275</td></tr><tr><td>Issued</td><td>1,302</td></tr><tr><td>Options exercised and other, net</td><td>232</td></tr><tr><td>Balance, December 31, 2011</td><td>886,809</td></tr><tr><td>Issued</td><td>1,746</td></tr><tr><td>Options exercised and other, net</td><td>246</td></tr><tr><td>Balance, December 31, 2012</td><td>888,801</td></tr></table>

## TREASURY STOCK

Occidental has had a 95 million share repurchase program authorized since 2008; however, the program does not obligate Occidental to acquire any specific number of shares and may be discontinued at any time. In 2012 and 2011, respectively, Occidental purchased 7.2 million and 2.7 million shares under the program at an average cost of $77.98 and $77.12 per share.

Additionally, Occidental purchased shares from the trustee of its defined contribution savings plan during the years ended December 31, 2012, 2011 and 2010.

As of December 31, 2012, 2011 and 2010, treasury stock shares numbered 83.3 million, 75.8 million and 72.5 million, respectively.

## NONREDEEMABLE PREFERRED STOCK

Occidental has authorized 50,000,000 shares of preferred stock with a par value of $1.00 per share. At December 31, 2012, 2011 and 2010, Occidental had no outstanding shares of preferred stock.



## EARNINGS PER SHARE

The following table presents the calculation of basic and diluted EPS for the years ended December 31:

<table><tr><td>In millions, except per-share amounts</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Basic EPS</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 4,635 (a)</td><td>$ 6,640</td><td>$ 4,641</td></tr><tr><td>Less: Income from continuing operations attributable to noncontrolling interest</td><td>—</td><td>—</td><td>(72)</td></tr><tr><td>Income from continuing operations attributable to common stock</td><td>4,635</td><td>6,640</td><td>4,569</td></tr><tr><td>Discontinued operations, net</td><td>(37)</td><td>131</td><td>(39)</td></tr><tr><td>Net income attributable to common stock</td><td>4,598</td><td>6,771</td><td>4,530</td></tr><tr><td>Less: Net income allocated to participating securities</td><td>(8)</td><td>(11)</td><td>(6)</td></tr><tr><td>Net income attributable to common stock, net of participating securities</td><td>$ 4,590</td><td>$ 6,760</td><td>$ 4,524</td></tr><tr><td>Weighted average number of basic shares</td><td>809.3</td><td>812.1</td><td>812.5</td></tr><tr><td>Basic EPS</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.57</td></tr><tr><td>Diluted EPS</td><td></td><td></td><td></td></tr><tr><td>Net income attributable to common stock, net of participating securities</td><td>$ 4,590</td><td>$ 6,760</td><td>$ 4,524</td></tr><tr><td>Weighted average number of basic shares</td><td>809.3</td><td>812.1</td><td>812.5</td></tr><tr><td>Dilutive effect of potentially dilutive securities</td><td>0.7</td><td>0.8</td><td>1.3</td></tr><tr><td>Total diluted weighted average common shares</td><td>810.0</td><td>812.9</td><td>813.8</td></tr><tr><td>Diluted EPS</td><td>$ 5.67</td><td>$ 8.32</td><td>$ 5.56</td></tr></table>

(a) Includes after-tax charges of $1.1 billion for the impairment of domestic gas assets and related items.

## ACCUMULATED OTHER COMPREHENSIVE LOSS

Accumulated other comprehensive loss consisted of the following after-tax gains (losses):

<table><tr><td>Balance at December 31, (in millions)</td><td>2012</td><td>2011</td></tr><tr><td>Foreign currency translation adjustments</td><td>$ (34)</td><td>$ (9)</td></tr><tr><td>Unrealized gains (losses) on derivatives</td><td>(7)</td><td>1</td></tr><tr><td>Pension and post-retirement adjustments (a)</td><td>(461)</td><td>(475)</td></tr><tr><td>Total</td><td>$ (502)</td><td>$ (483)</td></tr></table>

(a) See Note 13 for further information.

## NOTE 12 STOCK-BASED INCENTIVE PLANS

Occidental has established several Plans that allow it to issue stock-based awards in the form of RSUs, stock options (Options), stock appreciation rights (SARs) and TSRs. An aggregate of 66 million shares of Occidental common stock were authorized for issuance and approximately 15 million shares had been issued through December 31, 2012. Of the remaining shares, approximately 19 million shares are available for grants of future awards because a plan provision requires each share covered by an award (other than Options and SARs) to be counted as if three shares were issued in determining the number of shares that otherwise would have been available for future awards. Further, the number of shares available for future awards may be less than 19 million depending on the type of award granted. Additionally, under the plan, the shares available for future awards may increase by the number of shares currently unvested or forfeitable, or three times that number as applicable, that (i) fail to vest, (ii) are forfeited or cancelled, or (iii) correspond to the portion of any stock-based awards settled in cash.

During 2012, non-employee directors were granted awards for 53,800 shares of restricted stock that fully vested on the grant date. Compensation expense for these awards was measured using the quoted market price of Occidental's common stock on the grant date and was fully recognized at that time.

The following table summarizes certain stock-based incentive amounts for the past three years:

<table><tr><td>For the years ended December 31, (in millions)</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Compensation expense</td><td>$ 78</td><td>$ 110</td><td>$ 136</td></tr><tr><td>Income tax benefit recognized in the income statement</td><td>$ 29</td><td>$ 40</td><td>$ 50</td></tr><tr><td>Intrinsic value of options and stock-settled SARs exercised</td><td>$ 18</td><td>$ 21</td><td>$ 74</td></tr><tr><td>Cash paid (a)</td><td>$ 83</td><td>$ 124</td><td>$ 97</td></tr><tr><td>Fair value of RSUs and TSRIs vested during the year (b)</td><td>$ 28</td><td>$ 53</td><td>$ 19</td></tr></table>

(a) Includes cash paid under the cash-settled portion of the SARs, RSUs and TSRIs.

(b) As measured on the vesting date for the stock-settled portion of the RSUs and TSRIs.



As of December 31, 2012, unrecognized compensation expense for all unvested stock-based incentive awards, based on year-end valuation, was $196 million. This expense is expected to be recognized over a weighted-average period of 2.1 years.

## RSUs

Certain employees are awarded the right to receive RSUs, some of which have performance criteria, and are, or are equivalent in value to, actual shares of Occidental common stock and are settled in cash or stock at the time of vesting. These awards vest at the end of, or ratably over, two or three years from the grant date, however, certain of the RSUs are forfeitable if performance objectives are not satisfied between the third and seventh anniversaries after the grant date. For those awards that cliff vest in two years, dividend equivalents are accumulated during the vesting period and are paid when they vest. For the remaining RSUs, dividend equivalents are paid during the vesting period. The weighted-average, grant-date fair values of cash-settled RSUs granted in 2012, 2011 and 2010 were $84.38, $104.74 and $77.14 per share, respectively. The weighted-average, grant-date fair values of the stock-settled RSUs granted in 2012, 2011, and 2010 were $84.81, $102.97 and $84.29 respectively.

A summary of changes in Occidental’s unvested cash- and stock-settled RSUs during the year ended December 31, 2012 is presented below:

<table><tr><td rowspan="2"></td><td colspan="2">Cash-Settled</td><td colspan="2">Stock-Settled</td></tr><tr><td>RSUs (000&#x27;s)</td><td>Weighted-Average Grant-Date Fair Value</td><td>RSUs (000&#x27;s)</td><td>Weighted-Average Grant-Dates Fair Value</td></tr><tr><td>Unvested at January 1</td><td>1,272</td><td>$ 90.50</td><td>568</td><td>$ 93.14</td></tr><tr><td>Granted</td><td>729</td><td>$ 84.38</td><td>824</td><td>$ 84.81</td></tr><tr><td>Vested</td><td>(621)</td><td>$ 83.61</td><td>(9)</td><td>$ 88.21</td></tr><tr><td>Forfeitures</td><td>(48)</td><td>$ 92.90</td><td>(8)</td><td>$ 84.57</td></tr><tr><td>Unvested at December 31</td><td>1,332</td><td>$ 90.27</td><td>1,375</td><td>$ 88.23</td></tr></table>

## STOCK OPTIONS AND SARs

Certain employees have been granted Options that are settled in stock and SARs that are settled either only in stock or only in cash. No Options or SARs have been granted since 2006 and all outstanding awards are vested. Exercise prices of the Options and SARs were equal to the quoted market value of Occidental's stock on the grant date. Generally, the Options and SARs vest ratably over three years from the grant date with a maximum term of ten years. These Options and SARs may be forfeited or accelerated under certain circumstances.

The fair value of each Option, stock-settled SAR or cash-settled SAR is initially measured on the grant date using the Black Scholes option valuation model. The expected life is estimated based on the actual weighted-average life of historical exercise activity of the grantee population at the grant date. The volatility factors are based on the historical volatilities of Occidental common stock over the expected lives as estimated on the grant date. The risk-free interest rate is the implied yield available on zero coupon T-notes (US Treasury Strip) at the grant date with a remaining term equal to the expected life of the measured instrument. The dividend yield is the expected annual dividend yield over the expected life, expressed as a percentage of the stock price on the grant date. Estimates of fair value may not accurately predict the value ultimately realized by employees who receive stock-based incentive awards, and the ultimate value may not be indicative of the reasonableness of the original estimates of fair value made by Occidental.

The following is a summary of Option and SAR transactions during the year ended December 31, 2012:

<table><tr><td rowspan="2"></td><td colspan="4">Cash-Settled</td><td colspan="4">Stock-Settled</td></tr><tr><td>SARs (000&#x27;s)</td><td>Weighted-Average Exercise Price</td><td>Weighted-Average Remaining Contractual Term (yrs)</td><td>Aggregate Intrinsic Value (000&#x27;s)</td><td>SARs &amp; Options (000&#x27;s)</td><td>Weighted-Average Exercise Price</td><td>Weighted-Average Remaining Contractual Term (yrs)</td><td>Aggregate Intrinsic Value (000&#x27;s)</td></tr><tr><td>Beginning balance, January 1</td><td>564</td><td>$ 24.66</td><td></td><td></td><td>782</td><td>$ 26.34</td><td></td><td></td></tr><tr><td>Exercised</td><td>(70)</td><td>$ 24.66</td><td></td><td></td><td>(245)</td><td>$ 14.22</td><td></td><td></td></tr><tr><td>Ending balance, December 31</td><td>494</td><td>$ 24.66</td><td>1.5</td><td>$ 25,639</td><td>537</td><td>$ 31.88</td><td>2.0</td><td>$ 24,008</td></tr><tr><td>Exercisable at December 31</td><td>494</td><td>$ 24.66</td><td>1.5</td><td>$ 25,639</td><td>537</td><td>$ 31.88</td><td>2.0</td><td>$ 24,008</td></tr></table>



## TSRIs

Certain executives are awarded TSRIs that vest at the end of the three- or four-year period following the grant date if performance targets are certified as being met. TSRIs granted in July 2012 have payouts that range from 0 to 100 percent of the maximum award that would settle, once certified, fully in stock. TSRIs granted in July 2011 and October 2010 have payouts that range from 0 to 100 percent of the maximum award that would settle, once certified, 50 percent in stock and 50 percent in cash. TSRIs granted in July 2009 have payouts that ranged from 0 to 200 percent of the target award that would settle, once certified, 60 percent in stock and 40 percent in cash. TSRIs granted in July 2008 had payouts of 150 percent of the target award and were certified and settled equally in stock and cash in 2012. Dividend equivalents for TSRI target shares are paid during the performance period regardless of the payout range or settlement provision, except for the TSRIs issued in 2010, 2011 and 2012, for which cumulative dividends will be paid upon vesting for the number of vested shares.

The fair values of TSRIs are initially determined on the grant date using a Monte Carlo simulation model based on Occidental's assumptions, noted in the following table, and the volatility from corresponding peer group companies. The expected life is based on the vesting period (Term). The risk-free interest rate is the implied yield available on zero coupon T-notes (US Treasury Strip) at the time of grant with a remaining term equal to the Term. The dividend yield is the expected annual dividend yield over the Term, expressed as a percentage of the stock price on the grant date. Estimates of fair value may not accurately predict the value ultimately realized by the employees who receive the awards, and the ultimate value may not be indicative of the reasonableness of the original estimates of fair value made by Occidental.

The grant-date assumptions used in the Monte Carlo simulation models for the estimated payout level of TSRIs were as follows:

<table><tr><td rowspan="2">Year Granted</td><td colspan="3">TSRIs</td></tr><tr><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Assumptions used:</td><td></td><td></td><td></td></tr><tr><td>Risk-free interest rate</td><td>0.4%</td><td>0.6%</td><td>0.6%</td></tr><tr><td>Dividend yield</td><td>2.6%</td><td>1.8%</td><td>1.8%</td></tr><tr><td>Volatility factor</td><td>34%</td><td>33%</td><td>32%</td></tr><tr><td>Expected life (years)</td><td>3</td><td>3</td><td>3</td></tr><tr><td>Grant-date fair value of underlying Occidental common stock</td><td>$ 84.57</td><td>$ 102.97</td><td>$ 84.29</td></tr></table>

A summary of Occidental’s unvested TSRIs as of December 31, 2012 and changes during the year ended December 31, 2012 is presented below:

<table><tr><td rowspan="2"></td><td colspan="3">TSRIs</td></tr><tr><td>Awards (000&#x27;s)</td><td colspan="2">Weighted-Average Grant-Date Fair Value of Occidental Stock</td></tr><tr><td>Unvested at January 1 (a)</td><td>1,865</td><td>$ 78.67</td><td></td></tr><tr><td>Granted (a)</td><td>453</td><td>$ 84.57</td><td></td></tr><tr><td>Vested (b)</td><td>(388)</td><td>$ 77.00</td><td></td></tr><tr><td>Forfeitures</td><td>—</td><td>$ —</td><td></td></tr><tr><td>Unvested at December 31 (a)</td><td>1,930</td><td>$ 80.39</td><td></td></tr></table>

(a) Unvested awards and award grants are presented at the target or mid-point payouts.

(b) The payout at vesting was 150 percent of the target for TSRIs.



Occidental has various benefit plans for its salaried, domestic union and nonunion hourly, and certain foreign national employees.

## DEFINED CONTRIBUTION PLANS

All domestic employees and certain foreign national employees are eligible to participate in one or more of the defined contribution retirement or savings plans that provide for periodic contributions by Occidental based on plan-specific criteria, such as base pay, age, level and employee contributions. Certain salaried employees participate in a supplemental retirement plan that restores benefits lost due to governmental limitations on qualified retirement benefits. The accrued liabilities for the supplemental retirement plan were $145 million and $126 million as of December 31, 2012 and 2011, respectively, and Occidental expensed $137 million in 2012, $110 million in 2011 and $101 million in 2010 under the provisions of these defined contribution and supplemental retirement plans.

## DEFINED BENEFIT PLANS

Participation in defined benefit plans is limited and approximately 1,000 domestic and 1,600 foreign national employees, mainly union, nonunion hourly and certain employees that joined Occidental from acquired operations with grandfathered benefits, are currently accruing benefits under these plans.

Pension costs for Occidental’s defined benefit pension plans, determined by independent actuarial valuations, are generally funded by payments to trust funds, which are administered by independent trustees.

## POSTRETIREMENT AND OTHER BENEFIT PLANS

Occidental provides medical and dental benefits and life insurance coverage for certain active, retired and disabled employees and their eligible dependents. Occidental generally funds the benefits as they are paid during the year. These benefit costs, including the postretirement costs, were approximately $218 million in 2012, $194 million in 2011 and $180 million in 2010.



## OBLIGATIONS AND FUNDED STATUS

The following tables show the amounts recognized in the consolidated balance sheets of Occidental related to its pension and postretirement benefit plans and their funding status, obligations and plan asset fair values (in millions):

<table><tr><td rowspan="2">As of December 31,</td><td colspan="3">Pension Benefits</td><td colspan="3">Postretirement Benefits</td></tr><tr><td>2012</td><td>2011</td><td></td><td>2012</td><td>2011</td><td></td></tr><tr><td>Amounts recognized in the consolidated balance sheet:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Other assets</td><td>$ 24</td><td>$ 24</td><td>$</td><td>—</td><td>$</td><td>—</td></tr><tr><td>Accrued liabilities</td><td>(4)</td><td>(5)</td><td></td><td>(59)</td><td></td><td>(47)</td></tr><tr><td>Deferred credits and other liabilities — other</td><td>(136)</td><td>(136)</td><td></td><td>(1,068)</td><td></td><td>(1,045)</td></tr><tr><td></td><td>$ (116)</td><td>$ (117)</td><td>$</td><td>(1,127)</td><td>$ (1,092)</td><td></td></tr><tr><td>AOCI included the following after-tax balances:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net loss</td><td>$ 134</td><td>$ 146</td><td>$</td><td>324</td><td>$ 331</td><td></td></tr><tr><td>Prior service cost</td><td>1</td><td>2</td><td></td><td>2</td><td></td><td>2</td></tr><tr><td></td><td>$ 135</td><td>$ 148</td><td>$</td><td>326</td><td>$ 333</td><td></td></tr><tr><td>For the years ended December 31,</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in benefit obligation:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Benefit obligation — beginning of year</td><td>$ 592</td><td>$ 615</td><td>$</td><td>1,092</td><td>$ 991</td><td></td></tr><tr><td>Service cost — benefits earned during the period</td><td>13</td><td>12</td><td></td><td>25</td><td></td><td>22</td></tr><tr><td>Interest cost on projected benefit obligation</td><td>27</td><td>29</td><td></td><td>42</td><td></td><td>45</td></tr><tr><td>Actuarial loss</td><td>46</td><td>49</td><td></td><td>26</td><td></td><td>81</td></tr><tr><td>Foreign currency exchange rate (gain) loss</td><td>2</td><td>(5)</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Benefits paid</td><td>(57)</td><td>(51)</td><td></td><td>(58)</td><td></td><td>(47)</td></tr><tr><td>Settlements</td><td>(8)</td><td>(57)</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Benefit obligation — end of year</td><td>$ 615</td><td>$ 592</td><td>$</td><td>1,127</td><td>$ 1,092</td><td></td></tr><tr><td>Changes in plan assets:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Fair value of plan assets — beginning of year</td><td>$ 475</td><td>$ 495</td><td>$</td><td>—</td><td>$</td><td>—</td></tr><tr><td>Actual return on plan assets</td><td>61</td><td>13</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Foreign currency exchange rate gain (loss)</td><td>(3)</td><td>(3)</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Employer contributions</td><td>31</td><td>78</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Benefits paid</td><td>(57)</td><td>(51)</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Settlements</td><td>(8)</td><td>(57)</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Fair value of plan assets — end of year</td><td>$ 499</td><td>$ 475</td><td>$</td><td>—</td><td>$</td><td>—</td></tr><tr><td>Unfunded status:</td><td>$ (116)</td><td>$ (117)</td><td>$</td><td>(1,127)</td><td>$ (1,092)</td><td></td></tr></table>

The following table sets forth details of the obligations and assets of Occidental's defined benefit pension plans (in millions):

<table><tr><td></td><td colspan="2">Accumulated Benefit Obligation in Excess of Plan Assets</td><td colspan="2">Plan Assets in Excess of Accumulated Benefit Obligation</td></tr><tr><td>As of December 31, (in millions)</td><td>2012</td><td>2011</td><td>2012</td><td>2011</td></tr><tr><td>Projected Benefit Obligation</td><td>$ 305</td><td>$ 361</td><td>$ 310</td><td>$ 231</td></tr><tr><td>Accumulated Benefit Obligation</td><td>$ 278</td><td>$ 334</td><td>$ 305</td><td>$ 227</td></tr><tr><td>Fair Value of Plan Assets</td><td>$ 171</td><td>$ 226</td><td>$ 328</td><td>$ 249</td></tr></table>

Occidental does not expect any plan assets to be returned during 2013.



## COMPONENTS OF NET PERIODIC BENEFIT COST

The following table sets forth the components of net periodic benefit costs (in millions):

<table><tr><td rowspan="2">For the years ended December 31, (in millions)</td><td colspan="4">Pension Benefits</td><td colspan="4">Postretirement Benefits</td></tr><tr><td>2012</td><td>2011</td><td>2010</td><td>2012</td><td>2011</td><td>2010</td><td>2012</td><td>2011</td></tr><tr><td>Net periodic benefit costs:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Service cost — benefits earned during the period</td><td>$ 13</td><td>$ 12</td><td>$ 16</td><td>$ 25</td><td>$ 22</td><td>$ 19</td><td></td><td></td></tr><tr><td>Interest cost on benefit obligation</td><td>27</td><td>29</td><td>30</td><td>42</td><td>45</td><td>44</td><td></td><td></td></tr><tr><td>Expected return on plan assets</td><td>(31)</td><td>(33)</td><td>(31)</td><td>—</td><td>—</td><td>—</td><td></td><td></td></tr><tr><td>Recognized actuarial loss</td><td>19</td><td>13</td><td>15</td><td>37</td><td>31</td><td>27</td><td></td><td></td></tr><tr><td>Other costs and adjustments</td><td>17</td><td>—</td><td>10</td><td>1</td><td>1</td><td>1</td><td></td><td></td></tr><tr><td>Net periodic benefit cost</td><td>$ 45</td><td>$ 21</td><td>$ 40</td><td>$ 105</td><td>$ 99</td><td>$ 91</td><td></td><td></td></tr></table>

The estimated net loss and prior service cost for the defined benefit pension plans that will be amortized from AOCI into net periodic benefit cost over the next fiscal year are $17 million and $0, respectively. The estimated net loss and prior service cost for the defined benefit postretirement plans that will be amortized from AOCI into net periodic benefit cost over the next fiscal year are $37 million and $1 million, respectively.

## ADDITIONAL INFORMATION

The following table sets forth the weighted-average assumptions used to determine Occidental's benefit obligation and net periodic benefit cost for domestic plans:

<table><tr><td rowspan="2">For the years ended December 31,</td><td colspan="2">Pension Benefits</td><td colspan="2">Postretirement Benefits</td></tr><tr><td>2012</td><td>2011</td><td>2012</td><td>2011</td></tr><tr><td>Benefit Obligation Assumptions:</td><td></td><td></td><td></td><td></td></tr><tr><td>Discount rate</td><td>3.59%</td><td>4.12%</td><td>3.89%</td><td>4.12%</td></tr><tr><td>Rate of compensation increase</td><td>4.00%</td><td>4.00%</td><td>—</td><td>—</td></tr><tr><td>Net Periodic Benefit Cost Assumptions:</td><td></td><td></td><td></td><td></td></tr><tr><td>Discount rate</td><td>4.12%</td><td>4.74%</td><td>4.12%</td><td>4.74%</td></tr><tr><td>Assumed long term rate of return on assets</td><td>6.50%</td><td>6.50%</td><td>—</td><td>—</td></tr><tr><td>Rate of compensation increase</td><td>4.00%</td><td>4.00%</td><td>—</td><td>—</td></tr></table>

For domestic pension plans and postretirement benefit plans, Occidental based the discount rate on the Aon/Hewitt AA-AAA Universe yield curve in 2012 and 2011. The weighted-average rate of increase in future compensation levels is consistent with Occidental's past and anticipated future compensation increases for employees participating in retirement plans that determine benefits using compensation. The assumed long-term rate of return on assets is estimated with regard to current market factors but within the context of historical returns. Occidental considers historical returns and correlation of equities and fixed-income securities and current market factors such as inflation and interest rates.

For pension plans outside the United States, Occidental based its discount rate on rates indicative of government or investment grade corporate debt in the applicable country, taking into account hyperinflationary environments when necessary. The discount rates used for the foreign pension plans ranged from 1.5 percent to 10.0 percent at both December 31, 2012 and 2011. The average rate of increase in future compensation levels ranged from 1.5 percent to 10.0 percent in 2012, depending on local economic conditions. The expected long-term rate of return on plan assets was 6.5 percent and 5.8 percent in excess of local inflation in 2012 and 2011, respectively.

The postretirement benefit obligation was determined by application of the terms of medical and dental benefits and life insurance coverage, including the effect of established maximums on covered costs, together with relevant actuarial assumptions and healthcare cost trend rates projected at an assumed U.S. Consumer Price Index (CPI) increase of 2.39 percent and 2.04 percent as of December 31, 2012 and 2011, respectively. Since 1993, participants other than certain union employees have paid for all medical cost increases in excess of increases in the CPI. For those union employees, Occidental projected that healthcare cost trend rates would decrease 0.5 percent per year from 8.5 percent in 2012 until they reach 6.0 percent in 2017, and remain at 6.0 percent thereafter. A 1-percent increase or a 1-percent decrease in these assumed healthcare cost trend rates would result in an increase of $44 million or a reduction of $37 million, respectively, in the postretirement benefit obligation as of December 31, 2012. The annual service and interest costs would not be materially affected by these changes.

The actuarial assumptions used could change in the near term as a result of changes in expected future trends and other factors that, depending on the nature of the changes, could cause increases or decreases in the plan assets and liabilities.



## FAIR VALUE OF PENSION PLAN ASSETS

Occidental employs a total return investment approach that uses a diversified blend of equity and fixed-income investments to optimize the long-term return of plan assets at a prudent level of risk. The investments are monitored by Occidental's Investment Committee in its role as fiduciary. The Investment Committee, consisting of senior Occidental executives, selects and employs various external professional investment management firms to manage specific investments across the spectrum of asset classes. Equity investments are diversified across United States and non-United States stocks, as well as differing styles and market capitalizations. Other asset classes such as private equity and real estate may be used with the goals of enhancing long-term returns and improving portfolio diversification. The target allocation of plan assets is 60 percent equity securities and 40 percent debt securities. Investment performance is measured and monitored on an ongoing basis through quarterly investment portfolio and manager guideline compliance reviews, annual liability measurements and periodic studies.

The fair values of Occidental’s pension plan assets by asset category are as follows (in millions):

Fair Value Measurements at December 31, 2012 Using

<table><tr><td>Description</td><td>Level 1</td><td>Level 2</td><td>Level 3</td><td>Total</td></tr><tr><td>Asset Class:</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. government securities</td><td>$ 24</td><td>$ —</td><td>$ —</td><td>$ 24</td></tr><tr><td>Corporate bonds (a)</td><td>—</td><td>83</td><td>—</td><td>83</td></tr><tr><td>Common/collective trusts (b)</td><td>—</td><td>11</td><td>—</td><td>11</td></tr><tr><td>Mutual funds:</td><td></td><td></td><td></td><td></td></tr><tr><td>Bond funds</td><td>84</td><td>—</td><td>—</td><td>84</td></tr><tr><td>Blend funds</td><td>106</td><td>—</td><td>—</td><td>106</td></tr><tr><td>Value and growth funds</td><td>5</td><td>—</td><td>—</td><td>5</td></tr><tr><td>Common and preferred stocks (c)</td><td>146</td><td>—</td><td>—</td><td>146</td></tr><tr><td>Other</td><td>—</td><td>35</td><td>11</td><td>46</td></tr><tr><td>Total pension plan assets (d)</td><td>$ 365</td><td>$ 129</td><td>$ 11</td><td>$ 505</td></tr></table>

Fair Value Measurements at December 31, 2011 Using

<table><tr><td>Description</td><td>Level 1</td><td>Level 2</td><td>Level 3</td><td>Total</td></tr><tr><td>Asset Class:</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. government securities</td><td>$ 22</td><td>$ —</td><td>$ —</td><td>$ 22</td></tr><tr><td>Corporate bonds (a)</td><td>—</td><td>83</td><td>—</td><td>83</td></tr><tr><td>Common/collective trusts (b)</td><td>—</td><td>14</td><td>—</td><td>14</td></tr><tr><td>Mutual funds:</td><td></td><td></td><td></td><td></td></tr><tr><td>Bond funds</td><td>84</td><td>—</td><td>—</td><td>84</td></tr><tr><td>Blend funds</td><td>97</td><td>—</td><td>—</td><td>97</td></tr><tr><td>Value and growth funds</td><td>5</td><td>—</td><td>—</td><td>5</td></tr><tr><td>Common and preferred stocks (c)</td><td>131</td><td>—</td><td>—</td><td>131</td></tr><tr><td>Other</td><td>—</td><td>34</td><td>12</td><td>46</td></tr><tr><td>Total pension plan assets (d)</td><td>$ 339</td><td>$ 131</td><td>$ 12</td><td>$ 482</td></tr></table>

(a) This category represents investment grade bonds of U.S. and non-U.S. issuers from diverse industries.

(b) This category includes investment funds that primarily invest in U.S. and non-U.S. common stocks and fixed-income securities.

(c) This category represents direct investments in common and preferred stocks from diverse U.S. and non-U.S. industries.

(d) Amounts exclude net payables of approximately $6 million and $7 million as of December 31, 2012 and 2011, respectively.

The activity during the years ended December 31, 2012 and 2011 for the assets using Level 3 fair value measurements was insignificant.

Occidental expects to contribute $5 million in cash to its defined benefit pension plans during 2013.



Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows:

<table><tr><td>For the years ended December 31, (in millions)</td><td>Pension Benefits</td><td>Postretirement Benefits</td></tr><tr><td>2013</td><td>$ 40</td><td>$ 50</td></tr><tr><td>2014</td><td>$ 44</td><td>$ 51</td></tr><tr><td>2015</td><td>$ 41</td><td>$ 52</td></tr><tr><td>2016</td><td>$ 46</td><td>$ 53</td></tr><tr><td>2017</td><td>$ 42</td><td>$ 54</td></tr><tr><td>2018 - 2022</td><td>$ 230</td><td>$ 294</td></tr></table>

## NOTE 14 INVESTMENTS AND RELATED-PARTY TRANSACTIONS

As of December 31, 2012 and 2011, investments in unconsolidated entities comprised $1.9 billion and $2.1 billion of equity-method investments, respectively.

## EQUITY INVESTMENTS

As of December 31, 2012, Occidental's equity investments consisted mainly of a 35-percent interest in the general partner of Plains Pipeline, a 24.5-percent interest in the stock of Dolphin Energy, and various other partnerships and joint ventures. Equity investments paid dividends of $526 million, $349 million and $217 million to Occidental in 2012, 2011 and 2010, respectively. As of December 31, 2012, cumulative undistributed earnings of equity-method investees since their respective acquisitions were approximately $240 million. As of December 31, 2012, Occidental's investments in equity investees exceeded the underlying equity in net assets by $1.1 billion, of which $1 billion represented goodwill and the remainder comprised intangibles amortized over their estimated useful lives.

The following table presents Occidental’s ownership interest in the summarized financial information of its equity-method investments:

<table><tr><td>For the years ended December 31, (in millions)</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Revenues</td><td>$ 2,667</td><td>$ 2,439</td><td>$ 1,759</td></tr><tr><td>Costs and expenses</td><td>2,310</td><td>2,046</td><td>1,482</td></tr><tr><td>Net income</td><td>$ 357</td><td>$ 393</td><td>$ 277</td></tr></table>

<table><tr><td>As of December 31, (in millions)</td><td>2012</td><td>2011</td></tr><tr><td>Current assets</td><td>$ 2,065</td><td>$ 2,230</td></tr><tr><td>Non-current assets</td><td>$ 5,104</td><td>$ 4,381</td></tr><tr><td>Current liabilities</td><td>$ 1,774</td><td>$ 1,532</td></tr><tr><td>Long-term debt</td><td>$ 2,250</td><td>$ 2,305</td></tr><tr><td>Other non-current liabilities</td><td>$ 241</td><td>$ 168</td></tr><tr><td>Stockholders&#x27; equity</td><td>$ 2,904</td><td>$ 2,606</td></tr></table>

Occidental’s investment in Dolphin, which was acquired in 2002, consists of two separate economic interests through which Occidental owns (i) a 24.5-percent undivided interest in the operations under an agreement which is proportionately consolidated in the financial statements; and (ii) a 24.5-percent interest in the stock of Dolphin Energy, which is accounted for as an equity investment.

During 2010, Occidental had a 50-percent joint interest in EHP, which was accounted for as an equity method investment. On December 31, 2010, Occidental completed its acquisition of the remaining 50-percent interest, bringing its total ownership to 100 percent. EHP was consolidated in Occidental's balance sheet as of December 31, 2010.



## RELATED-PARTY TRANSACTIONS

Occidental from time to time purchases oil, NGLs, power, steam and chemicals from and sells oil, NGLs, gas, chemicals and power to certain of its equity investees at market-related prices. During 2012, 2011 and 2010, Occidental entered into the following related-party transactions and had the following amounts due from or to its related parties:

<table><tr><td>December 31, (in millions)</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Purchases (a)</td><td>$ 8</td><td>$ 10</td><td>$ 153</td></tr><tr><td>Sales (b)</td><td>$ 419</td><td>$ 392</td><td>$ 440</td></tr><tr><td>Services</td><td>$ 17</td><td>$ 10</td><td>$ 2</td></tr><tr><td>Advances and amounts due from</td><td>$ 25</td><td>$ 32</td><td>$ 135</td></tr><tr><td>Amounts due to</td><td>$ 129</td><td>$ 21</td><td>$ 383</td></tr></table>

(a) In 2010, purchases from EHP accounted for 90 percent of total purchases.

(b) In 2012, 2011 and 2010, sales of Occidental-produced oil and NGLs to Plains Pipeline accounted for 80 percent, 76 percent and 50 percent of these totals, respectively. Additionally, Occidental conducts marketing and trading activities with Plains Pipeline for oil and NGLs. These transactions are reported in Occidental's income statement on a net margin basis. The sales amounts above include the net margins on such transactions, which were negligible. In 2012 and 2011, sales to Dolphin Energy accounted for 12 percent and 16 percent, of total sales, respectively. In 2010, sales to EHP and Dolphin Energy accounted for 44 percent of total sales.

## NOTE 15 FAIR VALUE MEASUREMENTS

## FAIR VALUES – RECURRING

The following tables provide fair value measurement information for assets and liabilities that are measured on a recurring basis as of December 31, 2012 and 2011 (in millions):

Fair Value Measurements at December 31, 2012 Using

<table><tr><td>Description</td><td>Level 1</td><td>Level 2</td><td>Level 3</td><td>Netting and Collateral (a)</td><td>Total Fair Value</td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity derivatives</td><td>$ 107</td><td>$ 312</td><td>$ —</td><td>$ (301)</td><td>$ 118</td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity derivatives</td><td>$ 99</td><td>$ 398</td><td>$ —</td><td>$ (371)</td><td>$ 126</td></tr></table>

Fair Value Measurements at December 31, 2011 Using

<table><tr><td>Description</td><td>Level 1</td><td>Level 2</td><td>Level 3</td><td>Netting and Collateral (a)</td><td>Total Fair Value</td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity derivatives</td><td>$ 310</td><td>$ 640</td><td>$ —</td><td>$ (758)</td><td>$ 192</td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commodity derivatives</td><td>$ 311</td><td>$ 652</td><td>$ —</td><td>$ (782)</td><td>$ 181</td></tr></table>

(a) Represents the impact of netting assets, liabilities and collateral when a legal right of offset exists.



## FAIR VALUES – NONRECURRING

Occidental performed impairment tests with respect to its proved and unproved properties due to the negative revisions to certain of its natural gas reserves and the continued deterioration of natural gas prices. The impairment tests, including the fair value estimation, incorporate a number of assumptions involving expectations of future cash flows. These assumptions include estimates of future product prices, which Occidental bases on forward price curves and, where applicable, contractual prices, estimates of oil and gas reserves, estimates of future expected operating and development costs and appropriate discount rates.

In 2012, Occidental recorded pre-tax impairment charges of $1.7 billion, almost all of which were for certain assets in Midcontinent, over 90 percent of which were related to natural gas properties, which were acquired more than four years ago on average. These properties were impacted by persistently low natural gas prices in the United States changing management's development plans and negative reserve revisions due to recent well performance. In 2010, Occidental recorded a pre-tax impairment charge of $275 million, predominantly of gas properties in the Rocky Mountain region. Occidental used the income approach to measure the fair value of these properties, using inputs categorized as Level 3 in the fair value hierarchy.

## FINANCIAL INSTRUMENTS FAIR VALUE

The carrying amounts of cash and cash equivalents and other on-balance-sheet financial instruments, other than fixed-rate debt, approximate fair value. The cost, if any, to terminate off-balance-sheet financial instruments is not significant.

## NOTE 16 INDUSTRY SEGMENTS AND GEOGRAPHIC AREAS

Occidental conducts its continuing operations through three segments: (1) oil and gas; (2) chemical; and (3) midstream and marketing. The oil and gas segment explores for, develops and produces oil and condensate, NGLs, and natural gas. The chemical segment mainly manufactures and markets basic chemicals and vinyls. The midstream and marketing segment gathers, processes, transports, stores, purchases and markets oil, condensate, NGLs, natural gas,  \( CO_{2} \)  and power. It also trades around its assets, including transportation and storage capacity, and trades oil, NGLs, gas and other commodities. The segment also invests in entities that conduct similar activities.

Earnings of industry segments and geographic areas exclude income taxes, interest income, interest expense, environmental remediation expenses, unallocated corporate expenses and discontinued operations, but include gains and losses from dispositions of segment and geographic area assets and income from the segments' equity investments. Intersegment sales eliminate upon consolidation and are generally made at prices approximating those that the selling entity would be able to obtain in third-party transactions.

Identifiable assets are those assets used in the operations of the segments. Corporate assets consist of cash, certain corporate receivables and PP&E, and an investment in the Joslyn, Canada oil sands project.



<table><tr><td>In millions</td><td>Oil and Gas</td><td>Chemical</td><td>Midstream and Marketing</td><td>Corporate and Eliminations</td><td>Total</td></tr><tr><td>YEAR ENDED DECEMBER 31, 2012</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net sales</td><td>$ 18,906 (a)</td><td>$ 4,580 (b)</td><td>$ 1,399 (c)</td><td>$ (713)</td><td>$ 24,172</td></tr><tr><td>Pretax operating profit (loss)</td><td>$ 7,095 (d)</td><td>$ 720</td><td>$ 439</td><td>$ (501) (f,h)</td><td>$ 7,753</td></tr><tr><td>Income taxes</td><td>—</td><td>—</td><td>—</td><td>(3,118) (g,h)</td><td>(3,118)</td></tr><tr><td>Discontinued operations, net</td><td>—</td><td>—</td><td>—</td><td>(37)</td><td>(37)</td></tr><tr><td>Net income (loss) attributable to common stock</td><td>$ 7,095</td><td>$ 720</td><td>$ 439</td><td>$ (3,656)</td><td>$ 4,598</td></tr><tr><td>Investments in unconsolidated entities</td><td>$ 113</td><td>$ 108</td><td>$ 1,662</td><td>$ 11</td><td>$ 1,894</td></tr><tr><td>Property, plant and equipment additions, net (i)</td><td>$ 8,282</td><td>$ 365</td><td>$ 1,612</td><td>$ 91</td><td>$ 10,350</td></tr><tr><td>Depreciation, depletion and amortization</td><td>$ 3,933</td><td>$ 345</td><td>$ 206</td><td>$ 27</td><td>$ 4,511</td></tr><tr><td>Total assets</td><td>$ 44,004</td><td>$ 3,854</td><td>$ 12,762</td><td>$ 3,590</td><td>$ 64,210</td></tr><tr><td>YEAR ENDED DECEMBER 31, 2011</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net sales</td><td>$ 18,419 (a)</td><td>$ 4,815 (b)</td><td>$ 1,447 (c)</td><td>$ (742)</td><td>$ 23,939</td></tr><tr><td>Pretax operating profit (loss)</td><td>$ 10,241 (d)</td><td>$ 861</td><td>$ 448</td><td>$ (709) (f,h)</td><td>$ 10,841 (d)</td></tr><tr><td>Income taxes</td><td>—</td><td>—</td><td>—</td><td>(4,201) (g,h)</td><td>(4,201)</td></tr><tr><td>Discontinued operations, net</td><td>—</td><td>—</td><td>—</td><td>131</td><td>131</td></tr><tr><td>Net income (loss) attributable to common stock</td><td>$ 10,241 (d)</td><td>$ 861</td><td>$ 448</td><td>$ (4,779)</td><td>$ 6,771</td></tr><tr><td>Investments in unconsolidated entities</td><td>$ 128</td><td>$ 121</td><td>$ 1,812</td><td>$ 11</td><td>$ 2,072</td></tr><tr><td>Property, plant and equipment additions, net (i)</td><td>$ 6,192</td><td>$ 241</td><td>$ 1,120</td><td>$ 51</td><td>$ 7,604</td></tr><tr><td>Depreciation, depletion and amortization</td><td>$ 3,064</td><td>$ 330</td><td>$ 173</td><td>$ 24</td><td>$ 3,591</td></tr><tr><td>Total assets</td><td>$ 38,967</td><td>$ 3,754</td><td>$ 11,962</td><td>$ 5,361</td><td>$ 60,044</td></tr><tr><td>YEAR ENDED DECEMBER 31, 2010</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net sales</td><td>$ 14,276 (a)</td><td>$ 4,016 (b)</td><td>$ 1,471 (c)</td><td>$ (718)</td><td>$ 19,045</td></tr><tr><td>Pretax operating profit (loss)</td><td>$ 7,151 (d,e)</td><td>$ 438</td><td>$ 472</td><td>$ (497) (f,h)</td><td>$ 7,564 (d,e)</td></tr><tr><td>Income taxes</td><td>—</td><td>—</td><td>—</td><td>(2,995) (g,h)</td><td>(2,995)</td></tr><tr><td>Discontinued operations, net</td><td>—</td><td>—</td><td>—</td><td>(39)</td><td>(39)</td></tr><tr><td>Net income (loss) attributable to common stock</td><td>$ 7,151 (d,e)</td><td>$ 438</td><td>$ 472</td><td>$ (3,531)</td><td>$ 4,530 (e)</td></tr><tr><td>Investments in unconsolidated entities</td><td>$ 123</td><td>$ 135</td><td>$ 1,770</td><td>$ 11</td><td>$ 2,039</td></tr><tr><td>Property, plant and equipment additions, net (i)</td><td>$ 3,211</td><td>$ 248</td><td>$ 537</td><td>$ 38</td><td>$ 4,034</td></tr><tr><td>Depreciation, depletion and amortization</td><td>$ 2,668</td><td>$ 321</td><td>$ 142</td><td>$ 22</td><td>$ 3,153</td></tr><tr><td>Total assets</td><td>$ 31,855</td><td>$ 3,755</td><td>$ 10,445</td><td>$ 6,377 (i)</td><td>$ 52,432</td></tr></table>

(See footnotes on next page)



## Footnotes:

(a) Oil sales represented approximately 90 percent, 87 percent and 86 percent of the oil and gas segment net sales for the years ended December 31, 2012, 2011 and 2010, respectively.

(b) Net sales for the chemical segment comprised the following products:

<table><tr><td></td><td>Basic Chemicals</td><td>Vinyls</td><td>Other Chemicals</td></tr><tr><td>Year ended December 31, 2012</td><td>57%</td><td>40%</td><td>3%</td></tr><tr><td>Year ended December 31, 2011</td><td>58%</td><td>39%</td><td>3%</td></tr><tr><td>Year ended December 31, 2010</td><td>57%</td><td>40%</td><td>3%</td></tr></table>

(c) Net sales for the midstream and marketing segment comprised the following:

<table><tr><td></td><td>Gas Processing</td><td>Power</td><td>Marketing, Trading, Transportation and other</td></tr><tr><td>Year ended December 31, 2012</td><td>59%</td><td>20%</td><td>21%</td></tr><tr><td>Year ended December 31, 2011</td><td>64%</td><td>27%</td><td>9%</td></tr><tr><td>Year ended December 31, 2010</td><td>52%</td><td>27%</td><td>21%</td></tr></table>

(d) The 2012 amount includes pre-tax charges of $1.7 billion for the impairment of domestic gas assets and related items. The 2011 amount includes pre-tax charges of $35 million related to exploration write-offs in Libya and $29 million related to a Colombian net worth tax, and a pre-tax gain for the sale of an interest in a Colombian pipeline of $22 million. The 2010 amount includes a $275 million pre-tax charge for asset impairments, predominantly of gas properties in the Rocky Mountain region.

(e) Includes amounts attributable to common stock after deducting a noncontrolling interest amount of $72 million.

(f) Includes unallocated net interest expense, administration expense, environmental remediation and other pre-tax items noted in footnote (h) below.

(g) Includes all foreign and domestic income taxes from continuing operations.

(h) Includes the following significant items affecting earnings for the years ended December 31:

<table><tr><td>Benefit (Charge) (In millions)</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>CORPORATE</td><td></td><td></td><td></td></tr><tr><td>Pre-tax operating profit (loss)</td><td></td><td></td><td></td></tr><tr><td>Premium on debt extinguishments</td><td>$ —</td><td>$ (163)</td><td>$ —</td></tr><tr><td>Litigation reserves</td><td>(20)</td><td>—</td><td>—</td></tr><tr><td></td><td>$ (20)</td><td>$ (163)</td><td>$ —</td></tr><tr><td>Income taxes</td><td></td><td></td><td></td></tr><tr><td>State income tax charge</td><td>$ —</td><td>$ (33)</td><td>$ —</td></tr><tr><td>Foreign tax credit carryforwards</td><td>—</td><td>—</td><td>80</td></tr><tr><td>Tax effect of pre-tax adjustments  \( * \)</td><td>636</td><td>50</td><td>100</td></tr><tr><td></td><td>$ 636</td><td>$ 17</td><td>$ 180</td></tr></table>

* Amounts represent the tax effect of all pre-tax adjustments listed, as well as those in footnote (d).

(i) Includes capital expenditures and capitalized interest, but excludes purchases of assets, net. Also includes amounts attributable to the noncontrolling interest in a Colombian subsidiary for 2010.

(j) Includes Argentine assets, which were classified as held for sale.

## GEOGRAPHIC AREAS

In millions

<table><tr><td rowspan="2">For the years ended December 31,</td><td colspan="3">Net sales (a)</td><td colspan="3">Property, plant and equipment, net</td></tr><tr><td>2012</td><td>2011</td><td>2010</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>United States</td><td>$ 15,359</td><td>$ 15,040</td><td>$ 12,151</td><td>$ 40,786</td><td>$ 36,283</td><td>$ 28,571</td></tr><tr><td>Foreign</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Qatar</td><td>3,356</td><td>3,432</td><td>2,677</td><td>2,676</td><td>2,735</td><td>2,823</td></tr><tr><td>Oman</td><td>2,578</td><td>2,500</td><td>1,666</td><td>2,353</td><td>2,143</td><td>1,967</td></tr><tr><td>Colombia</td><td>1,027</td><td>1,054</td><td>999</td><td>1,041</td><td>854</td><td>715</td></tr><tr><td>Yemen</td><td>407</td><td>907</td><td>766</td><td>199</td><td>245</td><td>347</td></tr><tr><td>Bahrain</td><td>215</td><td>187</td><td>100</td><td>688</td><td>477</td><td>222</td></tr><tr><td>United Arab Emirates</td><td>—</td><td>—</td><td>—</td><td>2,104</td><td>971</td><td>1</td></tr><tr><td>Other Foreign</td><td>1,230</td><td>819</td><td>686</td><td>2,217</td><td>1,976</td><td>1,890</td></tr><tr><td>Total Foreign</td><td>8,813</td><td>8,899</td><td>6,894</td><td>11,278</td><td>9,401</td><td>7,965</td></tr><tr><td>Total</td><td>$ 24,172</td><td>$ 23,939</td><td>$ 19,045</td><td>$ 52,064</td><td>$ 45,684</td><td>$ 36,536</td></tr></table>

(a) Sales are shown by individual country based on the location of the entity making the sale.



<table><tr><td>Three months ended</td><td>March 31</td><td colspan="2">June 30</td><td colspan="2">September 30</td><td colspan="2">December 31</td></tr><tr><td>Segment net sales</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil and gas</td><td>$ 4,902</td><td>$ 4,495</td><td>$ 4,635</td><td>$ 4,874</td><td></td><td></td><td></td></tr><tr><td>Chemical</td><td>1,148</td><td>1,172</td><td>1,119</td><td>1,141</td><td></td><td></td><td></td></tr><tr><td>Midstream, marketing and other</td><td>393</td><td>262</td><td>389</td><td>355</td><td></td><td></td><td></td></tr><tr><td>Eliminations</td><td>(175)</td><td>(161)</td><td>(178)</td><td>(199)</td><td></td><td></td><td></td></tr><tr><td>Net sales</td><td>$ 6,268</td><td>$ 5,768</td><td>$ 5,965</td><td>$ 6,171</td><td></td><td></td><td></td></tr><tr><td>Gross profit</td><td>$ 3,144</td><td>$ 2,541</td><td>$ 2,617</td><td>$ 2,842</td><td></td><td></td><td></td></tr><tr><td>Segment earnings</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil and gas</td><td>$ 2,504</td><td>$ 2,043</td><td>$ 2,026</td><td>$ 522</td><td>(a)</td><td></td><td></td></tr><tr><td>Chemical</td><td>184</td><td>194</td><td>162</td><td>180</td><td></td><td></td><td></td></tr><tr><td>Midstream, marketing and other</td><td>131</td><td>77</td><td>156</td><td>75</td><td></td><td></td><td></td></tr><tr><td></td><td>2,819</td><td>2,314</td><td>2,344</td><td>777</td><td></td><td></td><td></td></tr><tr><td>Unallocated corporate items</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Interest expense, net</td><td>(28)</td><td>(25)</td><td>(34)</td><td>(30)</td><td></td><td></td><td></td></tr><tr><td>Income taxes</td><td>(1,139)</td><td>(875)</td><td>(855)</td><td>(249)</td><td></td><td></td><td></td></tr><tr><td>Other</td><td>(92)</td><td>(82)</td><td>(76)</td><td>(134)</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>1,560</td><td>1,332</td><td>1,379</td><td>364</td><td></td><td></td><td></td></tr><tr><td>Discontinued operations, net</td><td>(1)</td><td>(4)</td><td>(4)</td><td>(28)</td><td></td><td></td><td></td></tr><tr><td>Net income attributable to common stock</td><td>$ 1,559</td><td>$ 1,328</td><td>$ 1,375</td><td>$ 336</td><td></td><td></td><td></td></tr><tr><td>Basic earnings per common share</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 1.92</td><td>$ 1.64</td><td>$ 1.70</td><td>$ 0.45</td><td></td><td></td><td></td></tr><tr><td>Discontinued operations, net</td><td>—</td><td>—</td><td>(0.01)</td><td>(0.03)</td><td></td><td></td><td></td></tr><tr><td>Basic earnings per common share</td><td>$ 1.92</td><td>$ 1.64</td><td>$ 1.69</td><td>$ 0.42</td><td></td><td></td><td></td></tr><tr><td>Diluted earnings per common share</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 1.92</td><td>$ 1.64</td><td>$ 1.70</td><td>$ 0.45</td><td></td><td></td><td></td></tr><tr><td>Discontinued operations, net</td><td>—</td><td>—</td><td>(0.01)</td><td>(0.03)</td><td></td><td></td><td></td></tr><tr><td>Diluted earnings per common share</td><td>$ 1.92</td><td>$ 1.64</td><td>$ 1.69</td><td>$ 0.42</td><td></td><td></td><td></td></tr><tr><td>Dividends per common share</td><td>$ 0.54</td><td>$ 0.54</td><td>$ 0.54</td><td>$ 0.54</td><td></td><td></td><td></td></tr><tr><td>Market price per common share</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>High</td><td>$ 106.68</td><td>$ 98.24</td><td>$ 93.60</td><td>$ 87.39</td><td></td><td></td><td></td></tr><tr><td>Low</td><td>$ 91.85</td><td>$ 76.59</td><td>$ 82.25</td><td>$ 72.43</td><td></td><td></td><td></td></tr></table>

(a) Includes fourth quarter pre-tax charges of $1.7 billion.



## 2011 Quarterly Financial Data (Unaudited)
In millions, except per-share amounts

<table><tr><td>Three months ended</td><td>March 31</td><td>June 30</td><td>September 30</td><td>December 31</td></tr><tr><td>Segment net sales</td><td></td><td></td><td></td><td></td></tr><tr><td>Oil and gas</td><td>$ 4,367</td><td>$ 4,591</td><td>$ 4,677</td><td>$ 4,784</td></tr><tr><td>Chemical</td><td>1,165</td><td>1,325</td><td>1,231</td><td>1,094</td></tr><tr><td>Midstream, marketing and other</td><td>412</td><td>441</td><td>256</td><td>338</td></tr><tr><td>Eliminations</td><td>(218)</td><td>(184)</td><td>(158)</td><td>(182)</td></tr><tr><td>Net sales</td><td>$ 5,726</td><td>$ 6,173</td><td>$ 6,006</td><td>$ 6,034</td></tr><tr><td>Gross profit</td><td>$ 3,049</td><td>$ 3,291</td><td>$ 2,975</td><td>$ 3,050</td></tr><tr><td>Segment earnings</td><td></td><td></td><td></td><td></td></tr><tr><td>Oil and gas</td><td>$ 2,468</td><td>$ 2,624</td><td>$ 2,612</td><td>$ 2,537</td></tr><tr><td>Chemical</td><td>219</td><td>253</td><td>245</td><td>144</td></tr><tr><td>Midstream, marketing and other</td><td>114</td><td>187</td><td>77</td><td>70</td></tr><tr><td></td><td>2,801</td><td>3,064</td><td>2,934</td><td>2,751</td></tr><tr><td>Unallocated corporate items</td><td></td><td></td><td></td><td></td></tr><tr><td>Interest expense, net</td><td>(214) (a)</td><td>(22)</td><td>(23)</td><td>(25)</td></tr><tr><td>Income taxes</td><td>(1,054)</td><td>(1,111)</td><td>(1,087)</td><td>(949)</td></tr><tr><td>Other</td><td>(128)</td><td>(112)</td><td>(49)</td><td>(136)</td></tr><tr><td>Income from continuing operations</td><td>1,405</td><td>1,819</td><td>1,775</td><td>1,641</td></tr><tr><td>Discontinued operations, net</td><td>144</td><td>(2)</td><td>(4)</td><td>(7)</td></tr><tr><td>Net income attributable to common stock</td><td>$ 1,549</td><td>$ 1,817</td><td>$ 1,771</td><td>$ 1,634</td></tr><tr><td>Basic earnings per common share</td><td></td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 1.72</td><td>$ 2.23</td><td>$ 2.18</td><td>$ 2.02</td></tr><tr><td>Discontinued operations, net</td><td>0.18</td><td>—</td><td>(0.01)</td><td>(0.01)</td></tr><tr><td>Basic earnings per common share</td><td>$ 1.90</td><td>$ 2.23</td><td>$ 2.17</td><td>$ 2.01</td></tr><tr><td>Diluted earnings per common share</td><td></td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 1.72</td><td>$ 2.23</td><td>$ 2.18</td><td>$ 2.02</td></tr><tr><td>Discontinued operations, net</td><td>0.18</td><td>—</td><td>(0.01)</td><td>(0.01)</td></tr><tr><td>Diluted earnings per common share</td><td>$ 1.90</td><td>$ 2.23</td><td>$ 2.17</td><td>$ 2.01</td></tr><tr><td>Dividends per common share</td><td>$ 0.46</td><td>$ 0.46</td><td>$ 0.46</td><td>$ 0.46</td></tr><tr><td>Market price per common share</td><td></td><td></td><td></td><td></td></tr><tr><td>High</td><td>$ 107.56</td><td>$ 117.89</td><td>$ 109.08</td><td>$ 101.65</td></tr><tr><td>Low</td><td>$ 93.25</td><td>$ 95.67</td><td>$ 69.90</td><td>$ 66.36</td></tr></table>

(a) Includes a pre-tax charge of $163 million related to the premium on debt extinguishment.



## Supplemental Oil and Gas Information (Unaudited)

The following tables set forth Occidental’s net interests in quantities of proved developed and undeveloped reserves of oil (including condensate), NGLs and natural gas and changes in such quantities. Reserves are stated net of applicable royalties. Estimated reserves include Occidental’s economic interests under production sharing contracts (PSCs) and other similar economic arrangements. In addition, discussions of oil and gas production or volumes, in general, refer to sales volumes unless the context requires or it is indicated otherwise.

## Oil Reserves

In millions of barrels (MMbbl)

<table><tr><td>PROVED DEVELOPED AND UNDEVELOPED RESERVES</td><td>United States</td><td>Latin America (a,b)</td><td>Middle East/ North Africa (c)</td><td>Total</td></tr><tr><td>Balance at December 31, 2009</td><td>1,385</td><td>95</td><td>494</td><td>1,974</td></tr><tr><td>Revisions of previous estimates</td><td>—</td><td>2</td><td>(34)</td><td>(32)</td></tr><tr><td>Improved recovery</td><td>82</td><td>9</td><td>42</td><td>133</td></tr><tr><td>Extensions and discoveries</td><td>1</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Purchases of proved reserves</td><td>72</td><td>—</td><td>30</td><td>102</td></tr><tr><td>Sales of proved reserves (d)</td><td>—</td><td>(3)</td><td>—</td><td>(3)</td></tr><tr><td>Production</td><td>(80)</td><td>(13)</td><td>(70)</td><td>(163)</td></tr><tr><td>Balance at December 31, 2010</td><td>1,460</td><td>90</td><td>462</td><td>2,012</td></tr><tr><td>Revisions of previous estimates</td><td>(71)</td><td>(3)</td><td>(60)</td><td>(134)</td></tr><tr><td>Improved recovery</td><td>135</td><td>16</td><td>50</td><td>201</td></tr><tr><td>Extensions and discoveries</td><td>8</td><td>4</td><td>3</td><td>15</td></tr><tr><td>Purchases of proved reserves</td><td>78</td><td>—</td><td>—</td><td>78</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(84)</td><td>(11)</td><td>(69)</td><td>(164)</td></tr><tr><td>Balance at December 31, 2011</td><td>1,526</td><td>96</td><td>386</td><td>2,008</td></tr><tr><td>Revisions of previous estimates</td><td>(70)</td><td>4</td><td>(3)</td><td>(69)</td></tr><tr><td>Improved recovery</td><td>143</td><td>7</td><td>30</td><td>180</td></tr><tr><td>Extensions and discoveries</td><td>7</td><td>—</td><td>27</td><td>34</td></tr><tr><td>Purchases of proved reserves</td><td>54</td><td>—</td><td>—</td><td>54</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(93)</td><td>(11)</td><td>(67)</td><td>(171)</td></tr><tr><td>Balance at December 31, 2012</td><td>1,567</td><td>96</td><td>373</td><td>2,036</td></tr><tr><td>PROVED DEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>1,131</td><td>71</td><td>378</td><td>1,580</td></tr><tr><td>December 31, 2010</td><td>1,126</td><td>69</td><td>366</td><td>1,561</td></tr><tr><td>December 31, 2011</td><td>1,146</td><td>69</td><td>317</td><td>1,532</td></tr><tr><td>December 31, 2012 (e)</td><td>1,156</td><td>82</td><td>295</td><td>1,533</td></tr><tr><td>PROVED UNDEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>254</td><td>24</td><td>116</td><td>394</td></tr><tr><td>December 31, 2010</td><td>334</td><td>21</td><td>96</td><td>451</td></tr><tr><td>December 31, 2011</td><td>380</td><td>27</td><td>69</td><td>476</td></tr><tr><td>December 31, 2012 (f)</td><td>411</td><td>14</td><td>78</td><td>503</td></tr></table>

(a) Proved reserves as of December 31, 2009 include proved oil reserves related to the noncontrolling interest of a Colombian subsidiary. On December 31, 2010, Occidental restructured its Colombian operations to take a direct working interest in the related assets. As a result, the December 31, 2010, 2011 and 2012 proved reserves amounts exclude the noncontrolling interest.

(b) Excludes proved oil reserves from the Argentine operations sold in February 2011 and classified as discontinued operations of 166 MMbbl and 108 MMbbl as of December 31, 2010 and 2009, respectively.

(c) A substantial majority of the proved reserve amounts relate to PSCs and other similar economic arrangements.

(d) Represents the change to no longer include the Colombian noncontrolling interest.

(e) Approximately 8 percent of the proved developed reserves at December 31, 2012 are nonproducing, the majority of which are located in the United States.

(f) The amount of Occidental's proved undeveloped reserves that are not expected to be developed within five years from the date initially recorded was insignificant.



<table><tr><td></td><td>United States</td><td>Latin America</td><td>Middle East/ North Africa (a)</td><td>Total</td></tr><tr><td>PROVED DEVELOPED AND UNDEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at December 31, 2009</td><td>221</td><td>—</td><td>68</td><td>289</td></tr><tr><td>Revisions of previous estimates</td><td>8</td><td>—</td><td>(2)</td><td>6</td></tr><tr><td>Improved recovery</td><td>16</td><td>—</td><td>—</td><td>16</td></tr><tr><td>Extensions and discoveries</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Purchases of proved reserves</td><td>11</td><td>—</td><td>—</td><td>11</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(19)</td><td>—</td><td>(5)</td><td>(24)</td></tr><tr><td>Balance at December 31, 2010</td><td>237</td><td>—</td><td>61</td><td>298</td></tr><tr><td>Revisions of previous estimates</td><td>—</td><td>—</td><td>(2)</td><td>(2)</td></tr><tr><td>Improved recovery</td><td>10</td><td>—</td><td>—</td><td>10</td></tr><tr><td>Extensions and discoveries</td><td>1</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Purchases of proved reserves</td><td>2</td><td>—</td><td>—</td><td>2</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(25)</td><td>—</td><td>(4)</td><td>(29)</td></tr><tr><td>Balance at December 31, 2011</td><td>225</td><td>—</td><td>55</td><td>280</td></tr><tr><td>Revisions of previous estimates</td><td>1</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Improved recovery</td><td>16</td><td>—</td><td>—</td><td>16</td></tr><tr><td>Extensions and discoveries</td><td>—</td><td>—</td><td>64</td><td>64</td></tr><tr><td>Purchases of proved reserves</td><td>1</td><td>—</td><td>—</td><td>1</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(27)</td><td>—</td><td>(3)</td><td>(30)</td></tr><tr><td>Balance at December 31, 2012</td><td>216</td><td>—</td><td>116</td><td>332</td></tr><tr><td>PROVED DEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>155</td><td>—</td><td>68</td><td>223</td></tr><tr><td>December 31, 2010</td><td>163</td><td>—</td><td>61</td><td>224</td></tr><tr><td>December 31, 2011</td><td>165</td><td>—</td><td>55</td><td>220</td></tr><tr><td>December 31, 2012 (b)</td><td>167</td><td>—</td><td>53</td><td>220</td></tr><tr><td>PROVED UNDEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>66</td><td>—</td><td>—</td><td>66</td></tr><tr><td>December 31, 2010</td><td>74</td><td>—</td><td>—</td><td>74</td></tr><tr><td>December 31, 2011</td><td>60</td><td>—</td><td>—</td><td>60</td></tr><tr><td>December 31, 2012 (c)</td><td>49</td><td>—</td><td>63</td><td>112</td></tr></table>

(a) A substantial portion of proved reserve amounts relate to PSCs and other similar economic arrangements.

(b) Approximately 5 percent of the proved developed reserves at December 31, 2012 are nonproducing, the majority of which are located in the United States.

(c) The amount of Occidental's proved undeveloped reserves that are not expected to be developed within five years from the date initially recorded was insignificant.



<table><tr><td></td><td>United States</td><td>Latin America (a)</td><td>Middle East/ North Africa (b)</td><td>Total</td></tr><tr><td>PROVED DEVELOPED AND UNDEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at December 31, 2009</td><td>2,799</td><td>53</td><td>2,175</td><td>5,027</td></tr><tr><td>Revisions of previous estimates</td><td>(55)</td><td>(1)</td><td>(60)</td><td>(116)</td></tr><tr><td>Improved recovery</td><td>344</td><td>10</td><td>87</td><td>441</td></tr><tr><td>Extensions and discoveries</td><td>7</td><td>—</td><td>12</td><td>19</td></tr><tr><td>Purchases of proved reserves</td><td>186</td><td>—</td><td>—</td><td>186</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(247)</td><td>(6)</td><td>(166)</td><td>(419)</td></tr><tr><td>Balance at December 31, 2010</td><td>3,034</td><td>56</td><td>2,048</td><td>5,138</td></tr><tr><td>Revisions of previous estimates</td><td>(369)</td><td>(19)</td><td>(78)</td><td>(466)</td></tr><tr><td>Improved recovery</td><td>222</td><td>2</td><td>95</td><td>319</td></tr><tr><td>Extensions and discoveries</td><td>35</td><td>—</td><td>16</td><td>51</td></tr><tr><td>Purchases of proved reserves</td><td>728</td><td>—</td><td>—</td><td>728</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(285)</td><td>(6)</td><td>(156)</td><td>(447)</td></tr><tr><td>Balance at December 31, 2011</td><td>3,365</td><td>33</td><td>1,925</td><td>5,323</td></tr><tr><td>Revisions of previous estimates</td><td>(748)</td><td>—</td><td>62</td><td>(686)</td></tr><tr><td>Improved recovery</td><td>317</td><td>11</td><td>34</td><td>362</td></tr><tr><td>Extensions and discoveries</td><td>19</td><td>—</td><td>784</td><td>803</td></tr><tr><td>Purchases of proved reserves</td><td>236</td><td>—</td><td>—</td><td>236</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(300)</td><td>(5)</td><td>(165)</td><td>(470)</td></tr><tr><td>Balance at December 31, 2012</td><td>2,889</td><td>39</td><td>2,640</td><td>5,568</td></tr><tr><td>PROVED DEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>1,931</td><td>51</td><td>1,759</td><td>3,741</td></tr><tr><td>December 31, 2010</td><td>2,007</td><td>50</td><td>1,665</td><td>3,722</td></tr><tr><td>December 31, 2011</td><td>2,365</td><td>32</td><td>1,555</td><td>3,952</td></tr><tr><td>December 31, 2012 (c)</td><td>2,121</td><td>36</td><td>1,816</td><td>3,973</td></tr><tr><td>PROVED UNDEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>868</td><td>2</td><td>416</td><td>1,286</td></tr><tr><td>December 31, 2010</td><td>1,027</td><td>6</td><td>383</td><td>1,416</td></tr><tr><td>December 31, 2011</td><td>1,000</td><td>1</td><td>370</td><td>1,371</td></tr><tr><td>December 31, 2012 (d)</td><td>768</td><td>3</td><td>824</td><td>1,595</td></tr></table>

(a) Excludes proved natural gas reserves from the Argentine operations sold in February 2011 and classified as discontinued operations of 182 Bcf and 130 Bcf as of December 31, 2010 and 2009, respectively.

(b) A substantial majority of proved reserve amounts relate to PSCs and other similar economic arrangements.

(c) Approximately 3 percent of the proved developed reserves at December 31, 2012 are nonproducing, the majority of which are located in the United States.

(d) The amount of Occidental's proved undeveloped reserves that are not expected to be developed within five years from the date initially recorded was insignificant.



<table><tr><td></td><td>United States</td><td>Latin America (b,c)</td><td>Middle East/ North Africa (d)</td><td>Total</td></tr><tr><td>PROVED DEVELOPED AND UNDEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at December 31, 2009</td><td>2,072</td><td>104</td><td>924</td><td>3,100</td></tr><tr><td>Revisions of previous estimates</td><td>(1)</td><td>2</td><td>(46)</td><td>(45)</td></tr><tr><td>Improved recovery</td><td>156</td><td>11</td><td>57</td><td>224</td></tr><tr><td>Extensions and discoveries</td><td>2</td><td>—</td><td>2</td><td>4</td></tr><tr><td>Purchases of proved reserves</td><td>114</td><td>—</td><td>30</td><td>144</td></tr><tr><td>Sales of proved reserves(e)</td><td>—</td><td>(3)</td><td>—</td><td>(3)</td></tr><tr><td>Production</td><td>(140)</td><td>(14)</td><td>(103)</td><td>(257)</td></tr><tr><td>Balance at December 31, 2010</td><td>2,203</td><td>100</td><td>864</td><td>3,167</td></tr><tr><td>Revisions of previous estimates</td><td>(132)</td><td>(7)</td><td>(75)</td><td>(214)</td></tr><tr><td>Improved recovery</td><td>182</td><td>16</td><td>66</td><td>264</td></tr><tr><td>Extensions and discoveries</td><td>15</td><td>4</td><td>6</td><td>25</td></tr><tr><td>Purchases of proved reserves</td><td>201</td><td>—</td><td>—</td><td>201</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(156)</td><td>(12)</td><td>(99)</td><td>(267)</td></tr><tr><td>Balance at December 31, 2011</td><td>2,313</td><td>101</td><td>762</td><td>3,176</td></tr><tr><td>Revisions of previous estimates</td><td>(194)</td><td>4</td><td>7</td><td>(183)</td></tr><tr><td>Improved recovery</td><td>212</td><td>9</td><td>36</td><td>257</td></tr><tr><td>Extensions and discoveries</td><td>10</td><td>—</td><td>222</td><td>232</td></tr><tr><td>Purchases of proved reserves</td><td>94</td><td>—</td><td>—</td><td>94</td></tr><tr><td>Sales of proved reserves</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Production</td><td>(170)</td><td>(12)</td><td>(98)</td><td>(280)</td></tr><tr><td>Balance at December 31, 2012</td><td>2,265</td><td>102</td><td>929</td><td>3,296</td></tr><tr><td>PROVED DEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>1,608</td><td>80</td><td>739</td><td>2,427</td></tr><tr><td>December 31, 2010</td><td>1,624</td><td>78</td><td>705</td><td>2,407</td></tr><tr><td>December 31, 2011</td><td>1,707</td><td>74</td><td>631</td><td>2,412</td></tr><tr><td>December 31, 2012 (f)</td><td>1,677</td><td>88</td><td>651</td><td>2,416</td></tr><tr><td>PROVED UNDEVELOPED RESERVES</td><td></td><td></td><td></td><td></td></tr><tr><td>December 31, 2009</td><td>464</td><td>24</td><td>185</td><td>673</td></tr><tr><td>December 31, 2010</td><td>579</td><td>22</td><td>159</td><td>760</td></tr><tr><td>December 31, 2011</td><td>606</td><td>27</td><td>131</td><td>764</td></tr><tr><td>December 31, 2012 (g)</td><td>588</td><td>14</td><td>278</td><td>880</td></tr></table>

(a) Natural gas volumes have been converted to barrels of oil equivalent (BOE) based on energy content of six thousand cubic feet (Mcf) of gas to one barrel of oil. Barrels of oil equivalence does not necessarily result in price equivalence. The price of natural gas on a barrel of oil equivalent basis is currently substantially lower than the corresponding price for oil and has been similarly lower over the recent past. For example, in 2012, the average prices of West Texas Intermediate (WTI) oil and New York Mercantile Exchange (NYMEX) natural gas were $94.21 per barrel and $2.81 per Mcf, respectively, resulting in an oil to gas ratio of over 30.

(b) Proved reserves as of December 31, 2009 include proved oil reserves related to the noncontrolling interest of a Colombian subsidiary.

(c) Excludes proved reserves from the Argentine operations sold in February 2011 and classified as discontinued operations of 196 MMBOE and 130 MMBOE as of December 31, 2010 and 2009, respectively.

(d) A substantial majority of proved reserve amounts relate to PSCs and other similar economic arrangements.

(e) Represents the change to no longer include the Colombian noncontrolling interest.

(f) Approximately 6 percent of the proved developed reserves at December 31, 2012 are nonproducing, the majority of which are located in the United States.

(g) The amount of Occidental's proved undeveloped reserves that are not expected to be developed within five years from the date initially recorded was insignificant.



## CAPITALIZED COSTS

Capitalized costs relating to oil and gas producing activities and related accumulated DD&A were as follows:

<table><tr><td>In millions</td><td>United States</td><td>Latin America</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>December 31, 2012</td><td></td><td></td><td></td><td></td></tr><tr><td>Proved properties</td><td>$ 42,563</td><td>$ 2,142</td><td>$ 15,873</td><td>$ 60,578</td></tr><tr><td>Unproved properties (a)</td><td>4,592</td><td>27</td><td>220</td><td>4,839</td></tr><tr><td>Total capitalized costs (b)</td><td>47,155</td><td>2,169</td><td>16,093</td><td>65,417</td></tr><tr><td>Accumulated depreciation, depletion and amortization</td><td>(13,432)</td><td>(1,068)</td><td>(8,582)</td><td>(23,082)</td></tr><tr><td>Net capitalized costs</td><td>$ 33,723</td><td>$ 1,101</td><td>$ 7,511</td><td>$ 42,335</td></tr><tr><td>December 31, 2011</td><td></td><td></td><td></td><td></td></tr><tr><td>Proved properties</td><td>$ 36,123</td><td>$ 1,861</td><td>$ 13,839</td><td>$ 51,823</td></tr><tr><td>Unproved properties (a)</td><td>4,675</td><td>—</td><td>184</td><td>4,859</td></tr><tr><td>Total capitalized costs (b)</td><td>40,798</td><td>1,861</td><td>14,023</td><td>56,682</td></tr><tr><td>Accumulated depreciation, depletion and amortization</td><td>(11,063)</td><td>(951)</td><td>(7,178)</td><td>(19,192)</td></tr><tr><td>Net capitalized costs</td><td>$ 29,735</td><td>$ 910</td><td>$ 6,845</td><td>$ 37,490</td></tr><tr><td>December 31, 2010</td><td></td><td></td><td></td><td></td></tr><tr><td>Proved properties</td><td>$ 28,516</td><td>$ 1,816</td><td>$ 12,231</td><td>$ 42,563</td></tr><tr><td>Unproved properties (a)</td><td>3,474</td><td>5</td><td>190</td><td>3,669</td></tr><tr><td>Total capitalized costs (b)</td><td>31,990</td><td>1,821</td><td>12,421</td><td>46,232</td></tr><tr><td>Accumulated depreciation, depletion and amortization</td><td>(9,321)</td><td>(1,050)</td><td>(5,960)</td><td>(16,331)</td></tr><tr><td>Net capitalized costs</td><td>$ 22,669</td><td>$ 771 (c)</td><td>$ 6,461</td><td>$ 29,901</td></tr></table>

(a) The 2012, 2011 and 2010 amounts primarily consist of Midcontinent and Other, Permian and California.

(b) Includes acquisition costs, development costs, capitalized interest and asset retirement obligations.

(c) Excludes Argentine net capitalized costs of $2.6 billion as of December 31, 2010.

## COSTS INCURRED

Costs incurred in oil and gas property acquisition, exploration and development activities, whether capitalized or expensed, were as follows:

<table><tr><td>In millions</td><td>United States</td><td>Latin America</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2012</td><td></td><td></td><td></td><td></td></tr><tr><td>Property acquisition costs</td><td></td><td></td><td></td><td></td></tr><tr><td>Proved properties</td><td>$ 1,689</td><td>$ —</td><td>$ 14</td><td>$ 1,703</td></tr><tr><td>Unproved properties</td><td>613</td><td>—</td><td>—</td><td>613</td></tr><tr><td>Exploration costs</td><td>539</td><td>1</td><td>114</td><td>654</td></tr><tr><td>Development costs</td><td>5,344</td><td>304</td><td>2,025</td><td>7,673</td></tr><tr><td>Costs incurred</td><td>$ 8,185</td><td>$ 305</td><td>$ 2,153</td><td>$ 10,643</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2011</td><td></td><td></td><td></td><td></td></tr><tr><td>Property acquisition costs</td><td></td><td></td><td></td><td></td></tr><tr><td>Proved properties</td><td>$ 3,185</td><td>$ —</td><td>$ —</td><td>$ 3,185</td></tr><tr><td>Unproved properties</td><td>1,311</td><td>—</td><td>32</td><td>1,343</td></tr><tr><td>Exploration costs</td><td>400</td><td>33</td><td>87</td><td>520</td></tr><tr><td>Development costs</td><td>4,100</td><td>214</td><td>1,495</td><td>5,809</td></tr><tr><td>Costs incurred</td><td>$ 8,996</td><td>$ 247</td><td>$ 1,614</td><td>$ 10,857</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2010</td><td></td><td></td><td></td><td></td></tr><tr><td>Property acquisition costs</td><td></td><td></td><td></td><td></td></tr><tr><td>Proved properties</td><td>$ 2,084</td><td>$ —</td><td>$ 63</td><td>$ 2,147</td></tr><tr><td>Unproved properties</td><td>2,290</td><td>—</td><td>—</td><td>2,290</td></tr><tr><td>Exploration costs</td><td>177</td><td>13</td><td>126</td><td>316</td></tr><tr><td>Development costs</td><td>1,674</td><td>178</td><td>1,231</td><td>3,083</td></tr><tr><td>Costs incurred</td><td>$ 6,225</td><td>$ 191 (a)</td><td>$ 1,420</td><td>$ 7,836</td></tr></table>

(a) Includes exploration and development costs of $2 million and $5 million, respectively, in 2010 related to the noncontrolling interest in a Colombian subsidiary. Excludes Argentine costs incurred of $448 million.



## RESULTS OF OPERATIONS

Occidental’s oil and gas producing activities for continuing operations, which exclude items such as asset dispositions, corporate overhead, interest and royalties, were as follows:

<table><tr><td>In millions</td><td>United States</td><td>Latin America</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2012</td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues (a)</td><td>$ 10,379</td><td>$ 1,085</td><td>$ 7,486</td><td>$ 18,950</td></tr><tr><td>Production costs (b)</td><td>2,963</td><td>165</td><td>1,061</td><td>4,189</td></tr><tr><td>Other operating expenses</td><td>723</td><td>43</td><td>224</td><td>990</td></tr><tr><td>Depreciation, depletion and amortization</td><td>2,412</td><td>117</td><td>1,404</td><td>3,933</td></tr><tr><td>Taxes other than on income</td><td>644</td><td>23</td><td>—</td><td>667</td></tr><tr><td>Asset impairments and related items</td><td>1,731</td><td>—</td><td>—</td><td>1,731</td></tr><tr><td>Exploration expenses</td><td>230</td><td>3</td><td>112</td><td>345</td></tr><tr><td>Pretax income</td><td>1,676</td><td>734</td><td>4,685</td><td>7,095</td></tr><tr><td>Income tax expense (c)</td><td>508</td><td>252</td><td>2,159</td><td>2,919</td></tr><tr><td>Results of operations</td><td>$ 1,168</td><td>$ 482</td><td>$ 2,526</td><td>$ 4,176</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2011</td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues (a)</td><td>$ 9,933</td><td>$ 1,113</td><td>$ 7,373</td><td>$ 18,419</td></tr><tr><td>Production costs (b)</td><td>2,338</td><td>172</td><td>918</td><td>3,428</td></tr><tr><td>Other operating expenses</td><td>584</td><td>37</td><td>217</td><td>838</td></tr><tr><td>Depreciation, depletion and amortization</td><td>1,754</td><td>90</td><td>1,220</td><td>3,064</td></tr><tr><td>Taxes other than on income</td><td>567</td><td>23</td><td>—</td><td>590</td></tr><tr><td>Exploration expenses</td><td>200</td><td>2</td><td>56</td><td>258</td></tr><tr><td>Pretax income</td><td>4,490</td><td>789</td><td>4,962</td><td>10,241</td></tr><tr><td>Income tax expense (c)</td><td>1,419</td><td>270</td><td>2,145</td><td>3,834</td></tr><tr><td>Results of operations</td><td>$ 3,071</td><td>$ 519</td><td>$ 2,817</td><td>$ 6,407</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2010</td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues (a)</td><td>$ 7,578</td><td>$ 1,046 (d)</td><td>$ 5,621</td><td>$ 14,245</td></tr><tr><td>Production costs (b)</td><td>1,757</td><td>167 (d)</td><td>698</td><td>2,622</td></tr><tr><td>Other operating expenses</td><td>432</td><td>15</td><td>208</td><td>655</td></tr><tr><td>Depreciation, depletion and amortization</td><td>1,412</td><td>122</td><td>1,134</td><td>2,668</td></tr><tr><td>Taxes other than on income</td><td>454</td><td>18</td><td>—</td><td>472</td></tr><tr><td>Asset impairments and related items</td><td>275</td><td>—</td><td>—</td><td>275</td></tr><tr><td>Exploration expenses</td><td>158</td><td>7</td><td>97</td><td>262</td></tr><tr><td>Pretax income</td><td>3,090</td><td>717</td><td>3,484</td><td>7,291</td></tr><tr><td>Income tax expense (c)</td><td>929</td><td>227</td><td>1,689</td><td>2,845</td></tr><tr><td>Results of operations</td><td>$ 2,161</td><td>$ 490 (d,e)</td><td>$ 1,795</td><td>$ 4,446</td></tr></table>

(a) Revenues are net of royalty payments.

(b) Production costs are the costs incurred in lifting the oil and gas to the surface and include gathering, primary processing, field storage and insurance on proved properties, but do not include DD&A, royalties, income taxes, interest, general and administrative and other expenses.

(c) United States federal income taxes reflect certain expenses related to oil and gas activities allocated for United States income tax purposes only, including allocated interest and corporate overhead.

(d) Includes revenues of $129 million, production costs of $17 million, and results of operations of $72 million in 2010, related to the noncontrolling interest in a Colombian subsidiary.

(e) Excludes amounts from the Argentine operations sold in February 2011 and classified as discontinued operations.



## RESULTS PER UNIT OF PRODUCTION FOR CONTINUING OPERATIONS

<table><tr><td></td><td>United States</td><td>Latin America</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2012</td><td></td><td></td><td></td><td></td></tr><tr><td>Revenue from each barrel of oil equivalent (\(/bbl.) (a,b)</td><td>$ 61.06</td><td>$ 96.30</td><td>$ 76.22</td><td>$ 67.81</td></tr><tr><td>Production costs</td><td>17.43</td><td>14.64</td><td>10.80</td><td>14.99</td></tr><tr><td>Other operating expenses</td><td>4.25</td><td>3.82</td><td>2.28</td><td>3.54</td></tr><tr><td>Depreciation, depletion and amortization</td><td>14.19</td><td>10.38</td><td>14.30</td><td>14.07</td></tr><tr><td>Taxes other than on income</td><td>3.79</td><td>2.04</td><td>—</td><td>2.39</td></tr><tr><td>Asset impairments and related items</td><td>10.18</td><td>—</td><td>—</td><td>6.19</td></tr><tr><td>Exploration expenses</td><td>1.35</td><td>0.27</td><td>1.14</td><td>1.23</td></tr><tr><td>Pretax income</td><td>9.87</td><td>65.15</td><td>47.70</td><td>25.40</td></tr><tr><td>Income tax expense (c)</td><td>2.99</td><td>22.37</td><td>21.98</td><td>10.45</td></tr><tr><td>Results of operations</td><td>$ 6.88</td><td>$ 42.78</td><td>$ 25.72</td><td>$ 14.95</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2011</td><td></td><td></td><td></td><td></td></tr><tr><td>Revenue from each barrel of oil equivalent (\)/bbl.) (a,b)</td><td>$ 63.56</td><td>$ 94.19</td><td>$ 74.58</td><td>$ 68.99</td></tr><tr><td>Production costs</td><td>14.96</td><td>14.56</td><td>9.29</td><td>12.84</td></tr><tr><td>Other operating expenses</td><td>3.74</td><td>3.13</td><td>2.20</td><td>3.14</td></tr><tr><td>Depreciation, depletion and amortization</td><td>11.22</td><td>7.62</td><td>12.34</td><td>11.48</td></tr><tr><td>Taxes other than on income</td><td>3.63</td><td>1.95</td><td>—</td><td>2.21</td></tr><tr><td>Exploration expenses</td><td>1.28</td><td>0.17</td><td>0.57</td><td>0.97</td></tr><tr><td>Pretax income</td><td>28.73</td><td>66.76</td><td>50.18</td><td>38.35</td></tr><tr><td>Income tax expense (c)</td><td>9.08</td><td>22.85</td><td>21.70</td><td>14.36</td></tr><tr><td>Results of operations</td><td>$ 19.65</td><td>$ 43.91</td><td>$ 28.48</td><td>$ 23.99</td></tr><tr><td>FOR THE YEAR ENDED DECEMBER 31, 2010</td><td></td><td></td><td></td><td></td></tr><tr><td>Revenue from each barrel of oil equivalent (\(/bbl.) (a,b)</td><td>$ 54.14</td><td>$ 73.31</td><td>$ 54.49</td><td>$ 55.35</td></tr><tr><td>Production costs</td><td>12.55</td><td>11.70</td><td>6.77</td><td>10.19</td></tr><tr><td>Other operating expenses</td><td>3.09</td><td>1.05</td><td>2.02</td><td>2.55</td></tr><tr><td>Depreciation, depletion and amortization</td><td>10.09</td><td>8.55</td><td>10.99</td><td>10.37</td></tr><tr><td>Taxes other than on income</td><td>3.24</td><td>1.26</td><td>—</td><td>1.83</td></tr><tr><td>Asset impairments and related items</td><td>1.96</td><td>—</td><td>—</td><td>1.07</td></tr><tr><td>Exploration expenses</td><td>1.13</td><td>0.49</td><td>0.94</td><td>1.02</td></tr><tr><td>Pretax income</td><td>22.08</td><td>50.26</td><td>33.77</td><td>28.32</td></tr><tr><td>Income tax expense (c)</td><td>6.64</td><td>15.91</td><td>16.37</td><td>11.05</td></tr><tr><td>Results of operations</td><td>$ 15.44</td><td>$ 34.35 (d,e)</td><td>$ 17.40</td><td>$ 17.27</td></tr></table>

(a) Natural gas volumes have been converted to BOE based on energy content of six thousand cubic feet (Mcf) of gas to one barrel of oil. Barrels of oil equivalence does not necessarily result in price equivalence. The price of natural gas on a barrel of oil equivalent basis is currently substantially lower than the corresponding price for oil and has been similarly lower over the recent past. For example, in 2012, the average prices of WTI oil and NYMEX natural gas were $94.21 per barrel and $2.81 per Mcf, respectively, resulting in an oil to gas ratio of over 30.

(b) Revenues are net of royalty payments.

(c) United States federal income taxes reflect certain expenses related to oil and gas activities allocated for United States income tax purposes only, including allocated interest and corporate overhead.

(d) Includes the noncontrolling interest in a Colombian subsidiary for 2010.

(e) Excludes amounts from the Argentine operations sold in February 2011 and classified as discontinued operations.

## STANDARDIZED MEASURE, INCLUDING YEAR-TO-YEAR CHANGES THEREIN, OF DISCOUNTED FUTURE NET CASH FLOWS

For purposes of the following disclosures, future cash flows were computed by applying to Occidental's proved oil and gas reserves the unweighted arithmetic average of the first-day-of-the-month price for each month within the years ended December 31, 2012, 2011 and 2010, respectively, unless prices were defined by contractual arrangements, and exclude escalations based upon future conditions. The realized prices used to calculate future cash flows vary by producing area and market conditions. Future operating and capital costs were forecast using the current cost environment applied to expectations of future operating and development activities. Future income tax expenses were computed by applying, generally, year-end statutory tax rates (adjusted for permanent differences, tax credits, allowances and foreign income repatriation considerations) to the estimated net future pre-tax cash flows. The discount was computed by application of a 10-percent discount factor. The calculations assumed the continuation of existing economic, operating and contractual conditions at December 31, 2012, 2011 and 2010. Such assumptions, which are required by regulation, have not always proven accurate in the past. Other valid assumptions would give rise to substantially different results.



## Standardized Measure of Discounted Future Net Cash Flows

<table><tr><td></td><td>United States</td><td>Latin America</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>AT DECEMBER 31, 2012</td><td></td><td></td><td></td><td></td></tr><tr><td>Future cash inflows</td><td>$ 161,821</td><td>$ 10,574</td><td>$ 48,914</td><td>$ 221,309</td></tr><tr><td>Future costs</td><td></td><td></td><td></td><td></td></tr><tr><td>Production costs and other operating expenses</td><td>(68,780)</td><td>(3,562)</td><td>(11,922)</td><td>(84,264)</td></tr><tr><td>Development costs (a)</td><td>(15,890)</td><td>(541)</td><td>(5,539)</td><td>(21,970)</td></tr><tr><td>Future income tax expense</td><td>(21,387)</td><td>(2,023)</td><td>(14,165)</td><td>(37,575)</td></tr><tr><td>Future net cash flows</td><td>55,764</td><td>4,448</td><td>17,288</td><td>77,500</td></tr><tr><td>Ten percent discount factor</td><td>(29,745)</td><td>(1,812)</td><td>(6,656)</td><td>(38,213)</td></tr><tr><td>Standardized measure of discounted future net cash flows</td><td>$ 26,019</td><td>$ 2,636</td><td>$ 10,632</td><td>$ 39,287</td></tr><tr><td>AT DECEMBER 31, 2011</td><td></td><td></td><td></td><td></td></tr><tr><td>Future cash inflows</td><td>$ 171,456</td><td>$ 8,494</td><td>$ 43,715</td><td>$ 223,665</td></tr><tr><td>Future costs</td><td></td><td></td><td></td><td></td></tr><tr><td>Production costs and other operating expenses</td><td>(69,404)</td><td>(2,807)</td><td>(8,926)</td><td>(81,137)</td></tr><tr><td>Development costs (a)</td><td>(13,660)</td><td>(689)</td><td>(3,407)</td><td>(17,756)</td></tr><tr><td>Future income tax expense</td><td>(26,175)</td><td>(1,579)</td><td>(15,374)</td><td>(43,128)</td></tr><tr><td>Future net cash flows</td><td>62,217</td><td>3,419</td><td>16,008</td><td>81,644</td></tr><tr><td>Ten percent discount factor</td><td>(32,835)</td><td>(1,415)</td><td>(5,127)</td><td>(39,377)</td></tr><tr><td>Standardized measure of discounted future net cash flows</td><td>$ 29,382</td><td>$ 2,004</td><td>$ 10,881</td><td>$ 42,267</td></tr><tr><td>AT DECEMBER 31, 2010</td><td></td><td></td><td></td><td></td></tr><tr><td>Future cash inflows</td><td>$ 133,080</td><td>$ 6,833</td><td>$ 39,156</td><td>$ 179,069</td></tr><tr><td>Future costs</td><td></td><td></td><td></td><td></td></tr><tr><td>Production costs and other operating expenses</td><td>(54,362)</td><td>(2,828)</td><td>(9,228)</td><td>(66,418)</td></tr><tr><td>Development costs (a)</td><td>(9,820)</td><td>(458)</td><td>(3,743)</td><td>(14,021)</td></tr><tr><td>Future income tax expense</td><td>(20,319)</td><td>(1,036)</td><td>(12,585)</td><td>(33,940)</td></tr><tr><td>Future net cash flows</td><td>48,579</td><td>2,511</td><td>13,600</td><td>64,690</td></tr><tr><td>Ten percent discount factor</td><td>(26,481)</td><td>(1,044)</td><td>(4,428)</td><td>(31,953)</td></tr><tr><td>Standardized measure of discounted future net cash flows</td><td>$ 22,098</td><td>$ 1,467</td><td>$ 9,172</td><td>$ 32,737</td></tr></table>

(a) Includes asset retirement costs.

## Changes in the Standardized Measure of Discounted Future Net Cash Flows From Proved Reserve Quantities

<table><tr><td>For the years ended December 31,</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Beginning of year</td><td>$ 42,267</td><td>$ 32,737</td><td>$ 23,756</td></tr><tr><td>Sales and transfers of oil and gas produced, net of production costs and other operating expenses</td><td>(14,818)</td><td>(15,243)</td><td>(11,698)</td></tr><tr><td>Net change in prices received per barrel, net of production costs and other operating expenses</td><td>(3,005)</td><td>20,325</td><td>15,507</td></tr><tr><td>Extensions, discoveries and improved recovery, net of future production and development costs</td><td>5,625</td><td>6,152</td><td>4,485</td></tr><tr><td>Change in estimated future development costs</td><td>(7,330)</td><td>(5,668)</td><td>(2,747)</td></tr><tr><td>Revisions of quantity estimates</td><td>(2,057)</td><td>(3,518)</td><td>(626)</td></tr><tr><td>Development costs incurred during the period</td><td>7,700</td><td>5,797</td><td>3,101</td></tr><tr><td>Accretion of discount</td><td>5,203</td><td>4,014</td><td>2,843</td></tr><tr><td>Net change in income taxes</td><td>5,045</td><td>(4,776)</td><td>(4,663)</td></tr><tr><td>Purchases and sales of reserves in place, net</td><td>1,076</td><td>3,220</td><td>1,871</td></tr><tr><td>Changes in production rates and other</td><td>(419)</td><td>(773)</td><td>908</td></tr><tr><td>Net change</td><td>(2,980)</td><td>9,530</td><td>8,981</td></tr><tr><td>End of year</td><td>$ 39,287</td><td>$ 42,267</td><td>$ 32,737</td></tr></table>



## Average Sales Prices

The following table sets forth, for each of the three years in the period ended December 31, 2012, Occidental's approximate average sales prices in continuing operations.

<table><tr><td></td><td></td><td>United States</td><td>Latin America (a)</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>2012</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil</td><td>—</td><td>Average sales price (\(/bbl.)</td><td>$ 93.72</td><td>$ 98.35</td><td>$ 108.76</td></tr><tr><td>NGLs</td><td>—</td><td>Average sales price (\(/bbl.)</td><td>$ 46.07</td><td>$ —</td><td>$ 37.74</td></tr><tr><td>Gas</td><td>—</td><td>Average sales price (\)/mcf.)</td><td>$ 2.62</td><td>$ 11.85</td><td>$ 0.76</td></tr><tr><td>2011</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil</td><td>—</td><td>Average sales price (\)/bbl.)</td><td>$ 92.80</td><td>$ 97.16</td><td>$ 104.34</td></tr><tr><td>NGLs</td><td>—</td><td>Average sales price (\)/bbl.)</td><td>$ 59.10</td><td>$ —</td><td>$ 32.09</td></tr><tr><td>Gas</td><td>—</td><td>Average sales price (\)/mcf.)</td><td>$ 4.06</td><td>$ 10.11</td><td>$ 0.81</td></tr><tr><td>2010</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil</td><td>—</td><td>Average sales price (\(/bbl.)</td><td>$ 73.79</td><td>$ 75.29</td><td>$ 76.67</td></tr><tr><td>NGLs</td><td>—</td><td>Average sales price (\(/bbl.)</td><td>$ 48.86</td><td>$ —</td><td>$ 30.64</td></tr><tr><td>Gas</td><td>—</td><td>Average sales price (\(/mcf.)</td><td>$ 4.53</td><td>$ 7.73</td><td>$ 0.82</td></tr></table>

(a) Excludes average sales prices from Argentine operations sold in February 2011 and classified as discontinued operations and for 2010 includes the noncontrolling interest in a Colombian subsidiary.

## Net Productive and Dry — Exploratory and Development Wells Completed

The following table sets forth, for each of the three years in the period ended December 31, 2012, Occidental's net productive and dry–exploratory and development wells completed.

<table><tr><td></td><td></td><td>United States</td><td>Latin America (a)</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>2012</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil</td><td>—</td><td>Exploratory Development</td><td>41.0</td><td>—</td><td>3.3</td></tr><tr><td>Gas</td><td>—</td><td>Exploratory Development</td><td>1,183.8</td><td>51.8</td><td>264.6</td></tr><tr><td>Dry</td><td>—</td><td>Exploratory Development</td><td>3.9</td><td>—</td><td>—</td></tr><tr><td></td><td></td><td></td><td>134.5</td><td>1.0</td><td>6.5</td></tr><tr><td></td><td></td><td></td><td>16.5</td><td>—</td><td>6.1</td></tr><tr><td></td><td></td><td></td><td>31.5</td><td>0.4</td><td>2.4</td></tr><tr><td>2011</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil</td><td>—</td><td>Exploratory Development</td><td>17.7</td><td>1.8</td><td>2.6</td></tr><tr><td>Gas</td><td>—</td><td>Exploratory Development</td><td>834.0</td><td>57.9</td><td>189.3</td></tr><tr><td></td><td></td><td></td><td>3.2</td><td>—</td><td>2.5</td></tr><tr><td></td><td></td><td></td><td>143.1</td><td>—</td><td>1.1</td></tr><tr><td>Dry</td><td>—</td><td>Exploratory Development</td><td>13.0</td><td>—</td><td>1.4</td></tr><tr><td></td><td></td><td></td><td>9.3</td><td>—</td><td>1.2</td></tr><tr><td>2010</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Oil</td><td>—</td><td>Exploratory Development</td><td>8.4</td><td>0.9</td><td>1.8</td></tr><tr><td>Gas</td><td>—</td><td>Exploratory Development</td><td>406.6</td><td>42.3</td><td>121.3</td></tr><tr><td></td><td></td><td></td><td>—</td><td>—</td><td>5.0</td></tr><tr><td></td><td></td><td></td><td>93.3</td><td>—</td><td>4.6</td></tr><tr><td>Dry</td><td>—</td><td>Exploratory Development</td><td>17.3</td><td>0.8</td><td>2.8</td></tr><tr><td></td><td></td><td></td><td>10.0</td><td>—</td><td>0.4</td></tr></table>

(a) Excludes for all years presented the exploratory and development wells completed by Argentine operations sold in February 2011 and classified as discontinued operations and for 2010 includes the noncontrolling interest in a Colombian subsidiary.



## Productive Oil and Gas Wells

The following table sets forth, as of December 31, 2012, Occidental's productive oil and gas wells (both producing and capable of production).

<table><tr><td colspan="2">Wells at December 31, 2012 (a)</td><td colspan="2">United States</td><td colspan="2">Latin America</td><td colspan="2">Middle East/ North Africa</td><td colspan="2">Total</td></tr><tr><td rowspan="2">Oil</td><td rowspan="2">—</td><td>Gross (b)</td><td>27,030</td><td>(1,839)</td><td>1,338</td><td>—</td><td>3,036</td><td>(670)</td><td>31,404</td></tr><tr><td>Net (c)</td><td>22,870</td><td>(1,449)</td><td>665</td><td>—</td><td>1,607</td><td>(322)</td><td>25,142</td></tr><tr><td rowspan="2">Gas</td><td rowspan="2">—</td><td>Gross (b)</td><td>6,743</td><td>(424)</td><td>30</td><td>—</td><td>131</td><td>(2)</td><td>6,904</td></tr><tr><td>Net (c)</td><td>5,942</td><td>(352)</td><td>28</td><td>—</td><td>69</td><td>(2)</td><td>6,039</td></tr></table>

(a) The numbers in parentheses indicate the number of wells with multiple completions.

(b) The total number of wells in which interests are owned.

(c) The sum of fractional interests.

## Participation in Exploratory and Development Wells Being Drilled

The following table sets forth, as of December 31, 2012, Occidental's participation in exploratory and development wells being drilled.

<table><tr><td>Wells at December 31, 2012</td><td>United States</td><td>Latin America</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>Exploratory and development wells</td><td></td><td></td><td></td><td></td></tr><tr><td>— Gross</td><td>181</td><td>7</td><td>56</td><td>244</td></tr><tr><td>— Net</td><td>165</td><td>4</td><td>25</td><td>194</td></tr></table>

At December 31, 2012, Occidental was participating in 193 pressure-maintenance projects, mostly waterfloods, in the United States, 8 in Latin America and 33 in the Middle East/North Africa.

## Oil and Gas Acreage

The following table sets forth, as of December 31, 2012, Occidental’s holdings of developed and undeveloped oil and gas acreage.

<table><tr><td>Thousands of acres at December 31, 2012</td><td>United States (a)</td><td>Latin America</td><td>Middle East/ North Africa</td><td>Total</td></tr><tr><td>Developed (b)</td><td></td><td></td><td></td><td></td></tr><tr><td>— Gross (c)</td><td>8,373</td><td>121</td><td>1,233</td><td>9,727</td></tr><tr><td>— Net (d)</td><td>5,012</td><td>83</td><td>562</td><td>5,657</td></tr><tr><td>Undeveloped (e)</td><td></td><td></td><td></td><td></td></tr><tr><td>— Gross (c)</td><td>6,208</td><td>484</td><td>17,058</td><td>23,750</td></tr><tr><td>— Net (d)</td><td>3,042</td><td>363</td><td>15,102</td><td>18,507</td></tr></table>

(a) Includes approximately 2.1 million acres in California, the large majority of which are net fee mineral interests.

(b) Acres spaced or assigned to productive wells.

(c) Total acres in which interests are held.

(d) Sum of the fractional interests owned based on working interests, or interests under PSCs and other economic arrangements.

(e) Acres on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of oil and gas, regardless of whether the acreage contains proved reserves.

Occidental’s investment in developed and undeveloped acreage comprises numerous concessions, blocks and leases. Work programs are designed to ensure that the exploration potential of any property is fully evaluated before expiration. In some instances, Occidental may elect to relinquish acreage in advance of the contractual expiration date if the evaluation process is complete and there is not a business basis for extension. In cases where additional time may be required to fully evaluate acreage, Occidental has generally been successful in obtaining extensions. Scheduled lease and concession expirations for undeveloped acreage over the next three years are not expected to have a material adverse impact on Occidental.



## Oil, NGLs and Natural Gas Production and Sales Volumes Per Day

The following tables set forth the production and sales volumes of oil, NGLs and natural gas per day for each of the three years in the period ended December 31, 2012. The differences between the production and sales volumes per day are generally due to the timing of shipments at Occidental's international locations where product is loaded onto tankers.

<table><tr><td>Production per Day</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>United States</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td></td><td></td><td></td></tr><tr><td>California</td><td>88</td><td>80</td><td>76</td></tr><tr><td>Permian</td><td>142</td><td>134</td><td>136</td></tr><tr><td>Midcontinent and Other</td><td>25</td><td>16</td><td>7</td></tr><tr><td>TOTAL</td><td>255</td><td>230</td><td>219</td></tr><tr><td>NGLs (MBBL)</td><td></td><td></td><td></td></tr><tr><td>California</td><td>17</td><td>15</td><td>16</td></tr><tr><td>Permian</td><td>39</td><td>38</td><td>29</td></tr><tr><td>Midcontinent and Other</td><td>17</td><td>16</td><td>7</td></tr><tr><td>TOTAL</td><td>73</td><td>69</td><td>52</td></tr><tr><td>Natural gas (MMCF)</td><td></td><td></td><td></td></tr><tr><td>California</td><td>256</td><td>260</td><td>280</td></tr><tr><td>Permian</td><td>155</td><td>157</td><td>199</td></tr><tr><td>Midcontinent and Other</td><td>410</td><td>365</td><td>198</td></tr><tr><td>TOTAL</td><td>821</td><td>782</td><td>677</td></tr><tr><td>Latin America (a)</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL) - Colombia (b)</td><td>29</td><td>29</td><td>37</td></tr><tr><td>Natural gas (MMCF) - Bolivia</td><td>13</td><td>15</td><td>16</td></tr><tr><td>Middle East/North Africa</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Bahrain</td><td>4</td><td>4</td><td>3</td></tr><tr><td>Dolphin</td><td>8</td><td>9</td><td>11</td></tr><tr><td>Oman</td><td>67</td><td>67</td><td>62</td></tr><tr><td>Qatar</td><td>71</td><td>73</td><td>76</td></tr><tr><td>Other</td><td>36</td><td>38</td><td>46</td></tr><tr><td>TOTAL</td><td>186</td><td>191</td><td>198</td></tr><tr><td>NGLs (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Dolphin</td><td>8</td><td>10</td><td>13</td></tr><tr><td>Other</td><td>1</td><td>—</td><td>1</td></tr><tr><td>TOTAL</td><td>9</td><td>10</td><td>14</td></tr><tr><td>Natural gas (MMCF)</td><td></td><td></td><td></td></tr><tr><td>Bahrain</td><td>232</td><td>173</td><td>169</td></tr><tr><td>Dolphin</td><td>163</td><td>199</td><td>236</td></tr><tr><td>Oman</td><td>57</td><td>54</td><td>48</td></tr><tr><td>TOTAL</td><td>452</td><td>426</td><td>453</td></tr><tr><td>Total Production (MBOE) (a,c)</td><td>766</td><td>733</td><td>711</td></tr></table>

(See footnotes following the Sales Volumes per Day table)



<table><tr><td>Sales Volumes per Day</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>United States</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td>255</td><td>230</td><td>219</td></tr><tr><td>NGLs (MBBL)</td><td>73</td><td>69</td><td>52</td></tr><tr><td>Natural gas (MMCF)</td><td>819</td><td>782</td><td>677</td></tr><tr><td>Latin America (a)</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL) - Colombia (b)</td><td>28</td><td>29</td><td>36</td></tr><tr><td>Natural gas (MMCF) - Bolivia</td><td>13</td><td>15</td><td>16</td></tr><tr><td>Middle East/North Africa</td><td></td><td></td><td></td></tr><tr><td>Oil (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Bahrain</td><td>4</td><td>4</td><td>3</td></tr><tr><td>Dolphin</td><td>8</td><td>9</td><td>12</td></tr><tr><td>Oman</td><td>66</td><td>69</td><td>61</td></tr><tr><td>Qatar</td><td>71</td><td>73</td><td>76</td></tr><tr><td>Other</td><td>36</td><td>34</td><td>42</td></tr><tr><td>TOTAL</td><td>185</td><td>189</td><td>194</td></tr><tr><td>NGLs (MBBL)</td><td></td><td></td><td></td></tr><tr><td>Dolphin</td><td>8</td><td>10</td><td>12</td></tr><tr><td>Other</td><td>1</td><td>—</td><td>1</td></tr><tr><td>TOTAL</td><td>9</td><td>10</td><td>13</td></tr><tr><td>Natural gas (MMCF)</td><td>452</td><td>426</td><td>453</td></tr><tr><td>Total Sales Volumes (MBOE) (a,c)</td><td>764</td><td>731</td><td>705</td></tr></table>

(a) For all periods presented, excludes volumes from the Argentine operations sold in February 2011 and classified as discontinued operations.

(b) Includes production and sales volumes per day of 5 mbl and 4 mbl, respectively, for the year ended December 31, 2010, related to the noncontrolling interest in a Colombian subsidiary.

(c) Natural gas volumes have been converted to BOE based on energy content of six Mcf of gas to one barrel of oil. Barrels of oil equivalence does not necessarily result in price equivalence. The price of natural gas on a barrel of oil equivalent basis is currently substantially lower than the corresponding price for oil and has been similarly lower over the recent past. For example, in 2012, the average prices of WTI oil and NYMEX natural gas were $94.21 per barrel and $2.81 per Mcf, respectively, resulting in an oil to gas ratio of over 30.



## Schedule II – Valuation and Qualifying Accounts

In millions

<table><tr><td rowspan="2"></td><td rowspan="2">Balance at Beginning of Period</td><td colspan="4">Additions</td><td rowspan="2">Deductions (a)</td><td rowspan="2">Balance at End of Period</td></tr><tr><td>Charged to Costs and Expenses</td><td>Charged to Other Accounts</td><td></td><td></td></tr><tr><td>2012</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Allowance for doubtful accounts</td><td>$ 16</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ 16</td><td></td></tr><tr><td>Environmental</td><td>$ 360</td><td>$ 56</td><td>$ —</td><td>$ —</td><td>(72)</td><td>$ 344</td><td></td></tr><tr><td>Litigation, tax and other reserves</td><td>198</td><td>57</td><td>—</td><td></td><td>(26)</td><td>229</td><td></td></tr><tr><td></td><td>$ 558</td><td>$ 113</td><td>$ —</td><td>$ —</td><td>(98)</td><td>$ 573</td><td>(b)</td></tr><tr><td>2011</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Allowance for doubtful accounts</td><td>$ 19</td><td>$ —</td><td>$ —</td><td>$ —</td><td>(3)</td><td>$ 16</td><td></td></tr><tr><td>Environmental</td><td>$ 366</td><td>$ 53</td><td>$ 14</td><td>$ —</td><td>(73)</td><td>$ 360</td><td></td></tr><tr><td>Litigation, tax and other reserves</td><td>193</td><td>37</td><td>—</td><td></td><td>(32)</td><td>198</td><td></td></tr><tr><td></td><td>$ 559</td><td>$ 90</td><td>$ 14</td><td>$ —</td><td>(105)</td><td>$ 558</td><td>(b)</td></tr><tr><td>2010</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Allowance for doubtful accounts</td><td>$ 30</td><td>$ (9)</td><td>$ —</td><td>$ —</td><td>(2)</td><td>$ 19</td><td></td></tr><tr><td>Environmental</td><td>$ 403</td><td>$ 26</td><td>$ 3</td><td>$ —</td><td>(66)</td><td>$ 366</td><td></td></tr><tr><td>Litigation, tax and other reserves</td><td>226</td><td>20</td><td>6</td><td></td><td>(59)</td><td>193</td><td></td></tr><tr><td></td><td>$ 629</td><td>$ 46</td><td>$ 9</td><td>$ —</td><td>(125)</td><td>$ 559</td><td>(b)</td></tr></table>

Note: The amounts presented represent continuing operations.

(a) Primarily represents payments.

(b) Of these amounts, $98 million, $100 million and $102 million in 2012, 2011 and 2010, respectively, are classified as current.



# ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

## ITEM 9A. CONTROLS AND PROCEDURES

## DISCLOSURE CONTROLS AND PROCEDURES

Occidental's President and Chief Executive Officer and its Executive Vice President and Chief Financial Officer supervised and participated in Occidental's evaluation of its disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934 (Exchange Act)) as of the end of the period covered by this report. Based upon that evaluation, Occidental's President and Chief Executive Officer and Executive Vice President and Chief Financial Officer concluded that Occidental's disclosure controls and procedures were effective as of December 31, 2012.

There has been no change in Occidental's internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the fourth quarter of 2012 that has materially affected, or is reasonably likely to materially affect, Occidental's internal control over financial reporting. Management's Annual Assessment of and Report on Occidental's Internal Control over Financial Reporting and the Report of Independent Registered Public Accounting Firm on Internal Control over Financial Reporting are set forth in Item 8.

## ITEM 9B. OTHER INFORMATION

On February 20, 2013, Occidental provided retention payment and severance benefits to Mr. William Albrecht, Vice President and President, Americas, Oxy Oil and Gas; Mr. James Lienert, Executive Vice President — Business Support; and Mr. Edward Lowe, Vice President and President, Oxy Oil and Gas - International Production among others. The arrangement for each of these named executive officers provides for a retention payment in certain circumstances, with his continued employment, equal to twice the executive's then yearly base salary, to be paid one year after a new Chief Executive Officer commences employment. If the executive is terminated without cause prior to December 31, 2014, then, subject to providing typical waivers and releases, the executive will receive (i) separation pay at his then current salary for 24 months, (ii) his target bonus amount for the year of separation and (iii) the same medical and other benefits (other than Notice and Severance Pay) as are received by employees terminated pursuant to Occidental's Notice and Severance Pay Plan in addition to the retention payment (if not previously paid).

On February 25, 2013, Occidental extended the term of the Employment Agreement of its Corporate Executive Vice President and Corporate Secretary, Donald P. de Brier, to December 31, 2014.

The foregoing descriptions of the retention payment and severance benefit arrangement and employment agreement extension are qualified in their entirety by reference to the Form of Retention Payment and Separation Benefits Attachment and the Amendment to Employment Agreement, which are attached as Exhibits 10.6 and 10.4, respectively.

## Part III

## ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Occidental has adopted a Code of Business Conduct (Code). The Code applies to the President and Chief Executive Officer; Executive Vice President and Chief Financial Officer; Vice President, Controller and Principal Accounting Officer; and persons performing similar functions (Key Personnel). The Code also applies to Occidental's directors, its employees and the employees of entities it controls. The Code is posted at www.oxy.com. Occidental will satisfy any disclosure requirement under Item 5.05 of Form 8-K regarding an amendment to, or waiver from, any provision of the Code with respect to its Key Personnel or directors by disclosing the nature of that amendment or waiver on its website.

This item incorporates by reference the information regarding Occidental's directors appearing under the caption "Election of Directors - forepart," and "-Board Committees - Audit Committee," "Security Ownership – Section 16(a) Beneficial Ownership Reporting Compliance," and "General Information – Nominations for Directors for Term Expiring in 2015" in Occidental's definitive proxy statement, relating to its May 3, 2013, Annual Meeting of Stockholders (2013 Proxy Statement). The list of Occidental's executive officers and related information under "Executive Officers" set forth in Part I of this report is incorporated by reference herein.

## ITEM 11. EXECUTIVE COMPENSATION

This item incorporates by reference the information appearing under the captions "Compensation Discussion and Analysis," ("except "Succession Planning"), "Executive Compensation Tables" and "Director Compensation" in the 2013 Proxy Statement. Pursuant to the rules and regulations under the Exchange Act, the information under the caption "Compensation Discussion and Analysis - Compensation Committee Report" shall not be deemed to be "soliciting material," or to be "filed" with the SEC, or subject to Regulation 14A or 14C under the Exchange Act or to the liabilities of Section 18 of the Exchange Act, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933.



## ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

This item incorporates by reference the information with respect to security ownership appearing under the caption "Security Ownership – Certain Beneficial Owners and Management" in the 2013 Proxy Statement. See also the information under "Securities Authorized for Issuance Under Equity Compensation Plans" in Part II, Item 5 of this report.

## ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE

This item incorporates by reference the information appearing under the caption "Corporate Governance – Board of Directors and its Committees – Independence", and "– Related Party Transactions" in the 2013 Proxy Statement.

## ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

This item incorporates by reference the information with respect to accountant fees and services appearing under the captions "Ratification of Independent Auditors – Audit and Other Fees" in the 2013 Proxy Statement.

## Part IV

## ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

The agreements included as exhibits to this report are included to provide information about their terms and not to provide any other factual or disclosure information about Occidental or the other parties to the agreements. The agreements contain representations and warranties by each of the parties to the applicable agreement that were made solely for the benefit of the other agreement parties and:

- should not be treated as categorical statements of fact, but rather as a way of allocating the risk among the parties if those statements prove to be inaccurate;

- have been qualified by disclosures that were made to the other party in connection with the negotiation of the applicable agreement, which disclosures are not necessarily reflected in the agreement;

• may apply standards of materiality in a way that is different from the way investors may view materiality; and

• were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement and are subject to more recent developments.

## (a) (1) and (2). Financial Statements and Financial Statement Schedule

Reference is made to Item 8 of the Table of Contents of this report, where these documents are listed.

## (a) (3). Exhibits

3.(i)* Restated Certificate of Incorporation of Occidental, dated November 12, 1999 (filed as Exhibit 3.(i) to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 1999, File No. 1-9210).

3.(i)(a)* Certificate of Change of Location of Registered Office and of Registered Agent, dated July 6, 2001 (filed as Exhibit 3.1(i) to the Registration Statement on Form S-3 of Occidental, File No. 333-82246).

3.(i)(b)* Certificate of Amendment of Restated Certificate of Incorporation of Occidental Petroleum Corporation, dated May 5, 2006 (filed as Exhibit 3.(i)(b) to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2006, File No. 1-9210).

3.(i)(c)* Certificate of Amendment of Restated Certificate of Incorporation of Occidental Petroleum Corporation, dated May 1, 2009 (filed as Exhibit 3.(i)(c) to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2009, File No. 1-9210).

3.(ii)* Bylaws of Occidental, as amended through May 5, 2011 (filed as Exhibit 3.(ii) to the Current Report on Form 8-K of Occidental dated May 5, 2011 (date of earliest event reported), filed May 6, 2011, File No. 1-9210).

4.1* Indenture, dated as of August 18, 2011, between Occidental Petroleum and The Bank of New York Mellon Trust Company, N.A. (filed as Exhibit 4.1 to the Current Report on Form 8-K of Occidental dated August 15, 2011 (date of earliest event reported), File No. 1-9210).

4.2* Indenture (Senior Debt Securities), dated as of April 1, 1998, between Occidental and The Bank of New York, as Trustee (filed as Exhibit 4 to the Registration Statement on Form S-3 of Occidental, File No. 333-52053).

Instruments defining the rights of holders of other long-term debt of Occidental and its subsidiaries are not being filed since the total amount of securities authorized under each of such instruments does not exceed 10 percent of the total assets of Occidental and its subsidiaries on a consolidated basis. Occidental agrees to furnish a copy of any such instrument to the Commission upon request.

All of the Exhibits numbered 10.1 to 10.68 are management contracts and compensatory plans required to be identified specifically as responsive to Item 601(b)(10)(iii)(A) of Regulation S-K pursuant to Item 15(b) of Form 10-K.

10.1* Amended and Restated Employment Agreement, dated as of October 9, 2008, between Occidental and Dr. Ray R. Irani (filed as Exhibit 10.1 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2008, File No. 1-9210).

10.2* Employment Agreement, dated January 28, 2010, between Occidental and Stephen I. Chazen (filed as Exhibit 10.1 to the Current Report on Form 8-K of Occidental dated January 28, 2010, File No. 1-9210).

10.3* Amended and Restated Employment Agreement, dated October 9, 2008, between Occidental and Donald P. de Brier (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2008, File No. 1-9210).



10.4 Amendment to Employment Agreement, dated February 25, 2013, between Occidental and Donald P. de Brier.

10.5* Agreement with Chief Financial Officer (filed as Exhibit 10.7 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2012, File No. 1-9210).

10.6 Retention Payment and Separation Benefits Attachment.

10.7* Form of Indemnification Agreement between Occidental and each of its directors and certain executive officers (filed as Exhibit B to the Proxy Statement of Occidental for its May 21, 1987, Annual Meeting of Stockholders, File No. 1-9210).

10.8* Occidental Petroleum Corporation Split Dollar Life Insurance Program and Related Documents (filed as Exhibit 10.2 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 1994, File No. 1-9210).

10.9* Split Dollar Life Insurance Agreement, dated January 24, 2002, by and between Occidental and Donald P. de Brier (filed as Exhibit 10.1 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended March 31, 2002, File No. 1-9210).

10.10* Occidental Petroleum Insured Medical Plan, as amended and restated effective April 29, 1994, amending and restating the Occidental Petroleum Corporation Executive Medical Plan (as amended and restated effective April 1, 1993) (filed as Exhibit 10 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ending March 31, 1994, File No. 1-9210).

10.11* Form of Occidental Petroleum Corporation Modified Deferred Compensation Plan (Effective December 31, 2006, Amended and Restated Effective November 1, 2008) (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2008, File No. 1-9210).

10.12* Form of Occidental Petroleum Corporation Amendment to Senior Executive Supplemental Life Insurance Plan (Effective as of January 1, 1986, Amended and Restated Effective as of January 1, 1996) (filed as Exhibit 10.5 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2008, File No. 1-9210).

10.13* Form of Occidental Petroleum Corporation Amendment to Senior Executive Survivor Benefit Plan (Effective as of January 1, 1986, Amended and Restated Effective as of January 1, 1996) (filed as Exhibit 10.6 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2008, File No. 1-9210).

10.14* Form of Occidental Petroleum Corporation Supplemental Retirement Plan II (Effective as of January 1, 2005, Amended and Restated as of November 1, 2008) (filed as Exhibit 10.7 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2008, File No. 1-9210).

10.15* Amendment Number 1 to the Occidental Petroleum Corporation Supplemental Retirement Plan II (Effective As Of January 1, 2005, Amended And Restated As Of November 1, 2008) (filed as Exhibit 10.16 to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2009, File No. 1-9210).

10.16* Amendment Number 2 to the Occidental Petroleum Corporation Supplemental Retirement Plan II (Effective As Of January 1, 2005, Amended And Restated As Of November 1, 2008) (filed as Exhibit 10.17 to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2009, File No. 1-9210).

10.17* Amendment Number 3 to the Occidental Petroleum Corporation Supplemental Retirement Plan II (Effective As Of January 1, 2005, Amended and Restated as of November 1, 2008) (filed as Exhibit 10.18 to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2011, File No. 1-9210).

10.18* Amendment Number 4 to the Occidental Petroleum Corporation Supplemental Retirement Plan II (Effective As Of January 1, 2005, Amended and Restated as of November 1, 2008) (filed as Exhibit 10.19 to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2011, File No. 1-9210).

10.19 Amendment Number 5 to the Occidental Petroleum Corporation Supplemental Retirement Plan II (Effective as of January 1, 2005, Amended and Restated as of November 1, 2008).

10.20* Occidental Petroleum Corporation 2001 Incentive Compensation Plan (as amended through September 12, 2002) (filed as Exhibit 10.2 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2002, File No. 1-9210).

10.21* Form of Incentive Stock Option Agreement under Occidental Petroleum Corporation 2001 Incentive Compensation Plan (July 2002 version) (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2002, File No. 1-9210).

10.22* Form of Nonguailfied Stock Option Agreement under Occidental Petroleum Corporation 2001 Incentive Compensation Plan (July 2002 version) (filed as Exhibit 10.5 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2002, File No. 1-9210).

10.23* Terms and Conditions for Incentive Stock Option Award under Occidental Petroleum Corporation 2001 Incentive Compensation Plan (July 2003 version) (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended June 30, 2003, File No. 1-9210).

10.24* Terms and Conditions for Nonguailfied Stock Option Award under Occidental Petroleum Corporation 2001 Incentive Compensation Plan (July 2003 version) (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended June 30, 2003, File No. 1-9210).

10.25* Terms and Conditions of Stock Appreciation Rights Award under Occidental Petroleum Corporation 2001 Incentive Compensation Plan (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2004, File No. 1-9210).

10.26* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan, as amended through October 13, 2010 (filed as Exhibit 10.1 to the Current Report on Form 8-K of Occidental dated October 13, 2010 (date of earliest event reported), filed October 14, 2010, File No. 1-9210).

10.27* Terms and Conditions of Stock Appreciation Rights Award under Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (filed as Exhibit 10.12 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended June 30, 2005, File No. 1-9210).

10.28* Agreement to Amend Outstanding Option Awards, dated October 26, 2005 (filed as Exhibit 10.2 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2005, File No. 1-9210).

10.29* Terms and Conditions of Stock Appreciation Rights (SARs) under Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (July 2006 version) (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended June 30, 2006, File No. 1-9210).

10.30* Form of Occidental Petroleum Corporation 2005 Deferred Stock Program (Restatement Effective as of November 1, 2008) (filed as Exhibit 10.8 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended September 30, 2008, File No. 1-9210).



10.31* Occidental Petroleum Corporation Executive Incentive Compensation Plan (filed as Exhibit 10.69 to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2005, File No. 1-9210).

10.32* Description of financial counseling program (filed as Exhibit 10.50 to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2003, File No. 1-9210).

10.33* Description of group excess liability insurance program (filed as Exhibit 10.51 to the Annual Report on Form 10-K of Occidental for the fiscal year ended December 31, 2003, File No. 1-9210).

10.34* Executive Stock Ownership Guidelines (filed as Exhibit 10.1 to the Quarterly Report on Form 10-Q of Occidental for the quarterly period ended March 31, 2005, File No. 1-9210).

10.35* Form of Restricted Stock Award for Non-Employee Directors under Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (filed as Exhibit 10.1 to the Current Report on Form 8-K of Occidental dated February 16, 2006 (date of earliest event reported), filed February 22, 2006, File No. 1-9210).

10.36* Amendment to Form of Restricted Stock Award for Non-Employee Directors under Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended September 30, 2007, File No. 1-9210).

10.37* Form of Restricted Stock Award for Non-Employee Directors under Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (2007 version) (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended September 30, 2007, File No. 1-9210).

10.38* Director Retainer and Attendance Fees (filed as Exhibit 10.2 to the Current Report on Form 8-K of Occidental dated February 16, 2006 (date of earliest event reported), filed February 22, 2006, File No. 1-9210).

10.39* Description of Automatic Grant of Directors' Restricted Stock Awards Pursuant to the Terms of the Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (filed as Exhibit 10.2 to the Quarterly Report on Form 10-Q of Occidental dated for the fiscal quarter ended June 30, 2010, File No. 1-9210).

10.40* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Oil And Gas Corporation Return On Assets Incentive Award Agreement (Cash-Based, Cash-Settled Award) (filed as Exhibit 10.5 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2007, File No. 1-9210).

10.41* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Chemical Corporation Return On Assets Incentive Award Agreement (Cash-Based, Cash-Settled Award) (filed as Exhibit 10.6 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2007, File No. 1-9210).

10.42* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Total Shareholder Return Incentive Award Agreement (Equity-based, Equity and Cash-settled Award) (filed as Exhibit 10.2 to the Current Report on Form 8-K of Occidental dated July 16, 2008 (date of earliest event reported), File No. 1-9210).

10.43* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Oil and Gas Corporation Return on Assets Incentive Award Agreement (Cash-based, Cash-settled Award) (filed as Exhibit 10.5 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2008, File No. 1-9210).

10.44* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Chemical Corporation Return on Assets Incentive Award Agreement (Cash-based, Cash-settled Award) (filed as Exhibit 10.6 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2008, File No. 1-9210).

10.45* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Return on Equity Incentive Award Agreement (Cash-based, Cash-settled Award) (filed as Exhibit 10.1 to the Current Report on Form 8-K of Occidental dated July 15, 2009 (Date of Earliest Event Reported), File No. 1-9210).

10.46* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Total Shareholder Return Incentive Award Agreement (Equity-based, Equity and Cash-settled Award) (filed as Exhibit 10.2 to the Current Report on Form 8-K of Occidental dated July 15, 2009 (Date of Earliest Event Reported), File No. 1-9210).

10.47* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Chemical Corporation Return on Assets Incentive Award Agreement (Cash-based, Cash-settled Award) (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2009, File No. 1-9210).

10.48* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Oil and Gas Corporation Return on Assets Incentive Award Agreement (Cash-based, Cash-settled Award) (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2009, File No. 1-9210).

10.49* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Long-Term Incentive Award Terms and Conditions (Equity-based, Cash-settled Award) (filed as Exhibit 10.5 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2009, File No. 1-9210).

10.50* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Long-Term Incentive Award Terms and Conditions (Equity-based, Cash-settled Award) (alternate – CV) (filed as Exhibit 10.6 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2009, File No. 1-9210).

10.51* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Restricted Stock Incentive Award Terms and Conditions (filed as Exhibit 10.2 to the Current Report on Form 8-K of Occidental dated October 13, 2010 (date of earliest event reported), filed October 14, 2010, File No. 1-9210).

10.52* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Total Shareholder Return Incentive Award Terms and Conditions (Equity-based, Equity and Cash-settled Award) (filed as Exhibit 10.3 to the Current Report on Form 8-K of Occidental dated October 13, 2010 (date of earliest event reported), filed October 14, 2010, File No. 1-9210).

10.53* Form of Amendment to 2008 Return On Equity Incentive Award Grant Agreement (filed as Exhibit 10.1 to the Current Report on Form 8-K of Occidental dated July 13, 2011 (date of earliest event reported), filed July 18, 2011, File No. 1-9210).

10.54* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Total Shareholder Return Incentive Award Terms and Conditions (Equity-based, Equity and Cash-settled Award) (filed as Exhibit 10.2 to the Current Report on Form 8-K of Occidental dated July 13, 2011 (date of earliest event reported), filed July 18, 2011, File No. 1-9210).



10.55* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Restricted Stock Incentive Award Terms and Conditions (filed as Exhibit 10.3 to the Current Report on Form 8-K of Occidental dated July 13, 2011 (date of earliest event reported), filed July 18, 2011, File No. 1-9210).

10.56* Form of Acknowledgment Letter (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2011, File No. 1-9210).

10.57* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Long-Term Incentive Award Terms and Conditions (Cash-Based, Cash-Settled Award) (filed as Exhibit 10.5 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2011, File No. 1-9210).

10.58* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Chemical Corporation Return on Assets Incentive Award Terms and Conditions (Cash-Based, Cash-Settled Award) (filed as Exhibit 10.6 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2011, File No. 1-9210).

10.59* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Oil and Gas Corporation Return on Assets Incentive Award Terms and Conditions (Cash-Based, Cash-Settled Award) (filed as Exhibit 10.7 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2011, File No. 1-9210).

10.60* Form of Restricted Stock Award for Non-Employee Directors under Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (filed as Exhibit 10.1 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended March 31, 2012, File No. 1-9210).

10.61* Form of Restricted Stock Unit Award for Non-Employee Directors under Occidental Petroleum Corporation 2005 Long-Term Incentive Plan (filed as Exhibit 10.2 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended March 31, 2012, File No. 1-9210).

10.62* Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Restricted Stock Award Terms and Conditions. (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended March 31, 2012, File No. 1-9210).

10.63* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Total Shareholder Return Incentive Award Terms And Conditions (Equity-based and Equity-settled Award) (filed as Exhibit 10.2 to Occidental's Current Report on Form 8-K dated July 11, 2012 (date of earliest event reported), filed July 13, 2012, File No. 1-9210).

10.64* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Restricted Stock Incentive Award Terms and Conditions (filed as Exhibit 10.3 to Occidental's Current Report on Form 8-K dated July 11, 2012 (date of earliest event reported), filed July 13, 2012, File No. 1-9210).

10.65* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Long-Term Incentive Award Terms and Conditions (Cash-Based, Equity And Cash-Settled Award) (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2012, File No. 1-9210).

10.66* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Chemical Corporation Return on Assets Incentive Award Terms and Conditions (Cash-Based, Cash-Settled Award) (filed as Exhibit 10.4 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2012, File No. 1-9210).

10.67* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Occidental Oil and Gas Corporation Return on Assets Incentive Award Terms and Conditions (Cash-Based, Cash-Settled Award) (filed as Exhibit 10.5 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2012, File No. 1-9210).

10.68* Form of Occidental Petroleum Corporation 2005 Long-Term Incentive Plan Common Stock and Sign-On Bonus and Other Award Agreement (filed as Exhibit 10.6 to the Quarterly Report on Form 10-Q of Occidental for the fiscal quarter ended June 30, 2012, File No. 1-9210).

12 Statement regarding computation of total enterprise ratios of earnings to fixed charges for each of the five years in the period ended December 31, 2012.

21 List of subsidiaries of Occidental at December 31, 2012.

23.1 Consent of Independent Registered Public Accounting Firm.

23.2 Consent of Independent Petroleum Engineers.

31.1 Certification of CEO Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2 Certification of CFO Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1 Certifications of CEO and CFO Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

99.1 Ryder Scott Company Process Review of the Estimated Future Reserves and Income Attributable to Certain Fee, Leasehold and Royalty Interests and Certain Economic Interests Derived Through Certain Production Sharing Contracts as of December 31, 2012.

101.INS XBRL Instance Document.

101.SCH XBRL Taxonomy Extension Schema Document.

101.CAL XBRL Taxonomy Extension Calculation Linkbase Document.

101.LAB XBRL Taxonomy Extension Label Linkbase Document.

101.PRE XBRL Taxonomy Extension Presentation Linkbase Document.

101.DEF XBRL Taxonomy Extension Definition Linkbase Document.



## SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

## OCCIDENTAL PETROLEUM CORPORATION

February 26, 2013

By: /s/ Stephen I. Chazen
Stephen I. Chazen
President
and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

<table><tr><td></td><td>Title</td><td>Date</td></tr><tr><td>/s/Stephen I. Chazen</td><td>President,</td><td></td></tr><tr><td>Stephen I. Chazen</td><td>Chief Executive Officer and Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Cynthia L. Walker</td><td>Executive Vice President and Chief Financial Officer</td><td>February 26, 2013</td></tr><tr><td>Cynthia L. Walker</td><td></td><td></td></tr><tr><td>/s/ Roy Pineci</td><td>Vice President, Controller and Principal Accounting Officer</td><td>February 26, 2013</td></tr><tr><td>Roy Pineci</td><td></td><td></td></tr><tr><td>/s/ Spencer Abraham</td><td></td><td></td></tr><tr><td>Spencer Abraham</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Howard I. Atkins</td><td></td><td></td></tr><tr><td>Howard I. Atkins</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Edward P. Djerejian</td><td></td><td></td></tr><tr><td>Edward P. Djerejian</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ John E. Feick</td><td></td><td></td></tr><tr><td>John E. Feick</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Margaret M. Foran</td><td></td><td></td></tr><tr><td>Margaret M. Foran</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Carlos M. Gutierrez</td><td></td><td></td></tr><tr><td>Carlos M. Gutierrez</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Ray R. Irani</td><td>Executive Chairman of the Board of Directors</td><td>February 26, 2013</td></tr><tr><td>Dr. Ray R. Irani</td><td></td><td></td></tr></table>



<table><tr><td></td><td>Title</td><td>Date</td></tr><tr><td>/s/Avedick B. Poladian</td><td></td><td></td></tr><tr><td>Avedick B. Poladian</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Aziz D. Syriani</td><td></td><td></td></tr><tr><td>Aziz D. Syriani</td><td>Director</td><td>February 26, 2013</td></tr><tr><td>/s/ Rosemary Tomich</td><td></td><td></td></tr><tr><td>Rosemary Tomich</td><td>Director</td><td>February 26, 2013</td></tr></table>