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

                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

        DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED) FEBRUARY 8, 2005

                        OCCIDENTAL PETROLEUM CORPORATION
             (Exact name of registrant as specified in its charter)

            DELAWARE                     1-9210              95-4035997
  (State or other jurisdiction        (Commission         (I.R.S. Employer
        of incorporation)             File Number)       Identification No.)

              10889 WILSHIRE BOULEVARD
              LOS ANGELES, CALIFORNIA                             90024
      (Address of principal executive offices)                 (ZIP code)

               Registrant's telephone number, including area code:
                                 (310) 208-8800

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Check the appropriate box below if the Form 8-K is intended to simultaneously
satisfy the filing obligation of the Registrant under any of the following
provisions (see General Instruction A.2. below):

[   ]  Written communications pursuant to Rule 425 under the Securities Act (17
CFR 230.425)

[   ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17
CFR 240.14a-12)

[   ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))

[   ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))

SECTION 2 - FINANCIAL INFORMATION Item 2.02. Results of Operations and Financial Condition - ---------- --------------------------------------------- On February 8, 2005, Occidental Petroleum Corporation released information regarding the revision upward of its earnings for the fiscal quarter ended December 31, 2004. The exhibits to this Form 8-K and the information set forth in this Item 2.02 are being furnished pursuant to Item 2.02, Results of Operations and Financial Condition. The full text of the press release is attached to this report as Exhibit 99.1. Updated Investor Relations Supplemental Schedules are attached to this report as Exhibit 99.2. 1

SECTION 8 - OTHER EVENTS Item 8.01. Other Events - ---------- ------------ Occidental Petroleum Corporation announced on February 8, 2005 that its fourth quarter net income was $77 million higher ($0.19 per share) than the $665 million ($1.67 per share) the company disclosed on January 24, 2005. The improvement in income is due to an increase in the carrying value of Occidental's investment in Lyondell Chemical Company because of an increase in Lyondell's book value resulting from its November 30, 2004 acquisition of Millennium Chemical Company. There is no cash effect to this non-core earnings item. Lyondell acquired Millennium Chemical Company by issuing additional shares of Lyondell common stock. Under current accounting rules (SEC Staff Accounting Bulletin No. 51), Occidental is required to record its share of the increase in Lyondell's net equity resulting from this issuance. The effect of this is an increase of $121 million in the carrying value of Occidental's investment in Lyondell and an increase in Occidental's net income of $77 million after-tax ($0.19 per share). At the time Occidental issued its earnings press release on January 24, Lyondell had not announced its fourth quarter and total-year 2004 results, and a year-end balance sheet was not available until Lyondell released its results on February 3, 2005. In its earnings press release, Occidental stated that earnings from an equity investment were based on a preliminary estimate of their earnings. Also, in its conference call regarding fourth quarter results, Occidental commented that Lyondell had not yet reported its results. Occidental owns 41 million shares of Lyondell common stock. As a result of the Millennium acquisition, Occidental's ownership percentage of Lyondell has decreased from approximately 22 percent to 17 percent. 2

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. OCCIDENTAL PETROLEUM CORPORATION (Registrant) DATE: January 24, 2005 S. P. Dominick, Jr. -------------------------------------------------- S. P. Dominick, Jr., Vice President and Controller (Chief Accounting and Duly Authorized Officer)

EXHIBIT INDEX 99.1 Press release dated February 8, 2005. 99.2 Updated Investor Relations Supplemental Schedules

                                                                   EXHIBIT 99.1


            ====================================================================
[OXY LOGO]  NEWS RELEASE                        OCCIDENTAL PETROLEUM CORPORATION
            ====================================================================
         10889 Wilshire Boulevard, Los Angeles, California 90024  (310) 208-8800

For Immediate Release: February 8, 2005

          Occidental Revises 4th Quarter Earnings Upward by 11 Percent
          ------------------------------------------------------------

     LOS ANGELES -- Occidental Petroleum Corporation (NYSE: OXY) today announced
that its fourth quarter net income was $77 million higher ($0.19 per share) than
the $665 million ($1.67 per share) the company disclosed on January 24, 2005.
The improvement in income is due to an increase in the carrying value of
Occidental's investment in Lyondell Chemical Company because of an increase in
Lyondell's book value resulting from its November 30, 2004 acquisition of
Millennium Chemical Company. There is no cash effect to this non-core earnings
item.

     Occidental's fourth quarter net income is $742 million ($1.86 per share,)
thereby increasing total net income for the year from $2.491 billion  ($6.30 per
share) to $2.568 billion ($6.49 per share).

                                       -0-

Contacts:  Lawrence P. Meriage (media)
           310-443-6562
           Kenneth J. Huffman (investors)
           212-603-8183
           On the web: www.oxy.com
                                                                    EXHIBIT 99.2


Investor Relations Supplemental Schedules
[OXY LOGO]


Occidental's results of operations often include the effects of significant
transactions and events affecting earnings that vary widely and unpredictably in
nature, timing, and amount. Therefore, management uses a measure called "core
earnings", which excludes those items. This non-GAAP measure is not meant to
disassociate those items from management's performance, but rather is meant to
provide useful information to investors interested in comparing Occidental's
earnings performance between periods. Reported earnings are considered
representative of management's performance over the long term. Core earnings is
not considered to be an alternative to operating income in accordance with
generally accepted accounting principles.


REVISED FEBRUARY 8, 2005


                              OCCIDENTAL PETROLEUM
                               2004 Fourth Quarter
                                Net Income (Loss)
                                  ($ millions)



                                              REPORTED                                                           CORE
                                               INCOME       SIGNIFICANT ITEMS AFFECTING INCOME                 EARNINGS
                                             ----------     ----------------------------------                ----------
                                                                                                  
Oil & Gas                                    $      977                                                       $      977

Chemical                                            130                                                              130

Corporate
 Interest expense, net - debt and
  trust preferred distributions                     (53)                                                             (53)
Other                                               (18)          (121)    Lyondell SAB 51 gain                     (139)
Taxes                                              (262)           (27)    IRS settlements                          (245)
                                                                    44     Tax effect of adjustments

                                             ----------     ----------                                        ----------
INCOME FROM CONTINUING OPERATIONS                   774           (148)                                              670
Discontinued operations, net of tax                 (32)            32     Discontinued operations, net               --
                                             ----------     ----------                                        ----------
NET INCOME                                   $      742     $     (116)                                       $      670
                                             ==========     ==========                                        ==========


BASIC EARNINGS PER COMMON SHARE
Income from continuing operations            $     1.94                                                       $     1.68
Discontinued operations, net of tax               (0.08)                                                              --
                                             ----------                                                       ----------
Net Income                                   $     1.86                                                       $     1.68
                                             ==========                                                       ==========



                                                                               1

Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM 2003 Fourth Quarter Net Income (Loss) ($ millions) REPORTED CORE INCOME SIGNIFICANT ITEMS AFFECTING INCOME EARNINGS ---------- ---------------------------------- ---------- Oil & Gas $ 640 $ 640 Chemical 72 72 Corporate Interest expense, net - debt and trust preferred distributions (63) (63) Other (109) (109) Taxes (157) (157) ---------- ---------- ---------- INCOME FROM CONTINUING OPERATIONS 383 -- 383 Discontinued operations, net of tax (1) 1 Discontinued operations, net -- ---------- ---------- ---------- NET INCOME $ 382 $ 1 $ 383 ========== ========== ========== BASIC EARNINGS PER COMMON SHARE $ 0.99 $ 0.99 ========== ========== 2

Investor Relations Supplemental Schedules [OXY LOGO] REVISED FEBRUARY 8, 2005 OCCIDENTAL PETROLEUM 2004 Twelve Months Net Income (Loss) ($ millions) REPORTED CORE INCOME SIGNIFICANT ITEMS AFFECTING INCOME EARNINGS ---------- ---------------------------------- ---------- Oil & Gas $ 3,544 $ 3,544 Chemical 412 412 Corporate Interest expense, net - debt and trust preferred distributions (240) 11 Trust pfd redemption charge (229) Other (171) (121) Lyondell SAB 51 gain (292) Taxes (939) (47) IRS settlements (946) 40 Tax effect of adjustments ---------- ---------- ---------- INCOME FROM CONTINUING OPERATIONS $ 2,606 $ (117) $ 2,489 Discontinued operations, net of tax (38) 38 Discontinued operations, net -- ---------- ---------- ---------- NET INCOME $ 2,568 $ (79) $ 2,489 ========== ========== ========== BASIC EARNINGS PER COMMON SHARE Income from continuing operations $ 6.59 $ 6.29 Discontinued operations, net of tax (0.10) -- ---------- ---------- Net Income $ 6.49 $ 6.29 ========== ========== 3

Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM 2003 Twelve Months Net Income (Loss) ($ millions) REPORTED CORE INCOME SIGNIFICANT ITEMS AFFECTING INCOME EARNINGS ---------- ---------------------------------- ---------- Oil & Gas $ 2,664 $ 2,664 Chemical 220 220 Corporate Interest expense, net - debt and trust preferred distributions (333) 61 Debt repayment fee (272) Other (284) (284) Taxes (666) (21) Tax effect of adjustments (687) ---------- ---------- ---------- Income from continuing operations 1,601 40 1,641 Discontinued operations, net (6) 6 Discontinued operations, net -- Cumulative effect of accounting (68) 68 Cumulative effect of acct -- changes, net changes, net ---------- ---------- ---------- NET INCOME $ 1,527 $ 114 $ 1,641 ========== ========== ========== BASIC EARNINGS PER COMMON SHARE Income from continuing operations $ 4.17 $ 4.27 Discontinued operations (0.01) -- Cumulative effect of accounting changes (0.18) -- ---------- ---------- $ 3.98 $ 4.27 ========== ========== 4

Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM Items Affecting Comparability of Core Earnings Between Periods PRE-TAX INCOME / (EXPENSE) FOURTH QUARTER TWELVE MONTHS ------------------------- ------------------------- 2004 2003 2004 2003 ---------- ---------- ---------- ---------- OIL & GAS Gain on sale of GOM assets (a) -- -- -- 14 Property tax refund -- 38 -- 38 Insurance and litigation reserves (6) -- (6) -- CHEMICALS Reorganizations / severance -- -- -- (15) Chlorine derivatives asset impairment -- -- -- (9) Production process write-off (12) -- (12) -- Insurance reserves (2) -- (2) -- CORPORATE Equity earnings 9 (16) 22 (58) Environmental remediation (59) (50) (59) (63) Insurance and litigation reserves (31) -- (31) -- Interest expense - early debt (1) -- (6) 6 extinguishments - 2004 / consolidation of variable interest entity - 2003 (a) Amount shown after-tax 5

Investor Relations Supplemental Schedules [OXY LOGO] REVISED FEBRUARY 8, 2005 OCCIDENTAL PETROLEUM WORLDWIDE EFFECTIVE TAX RATE ---------------------------------------- ------------------------- QUARTERLY YEAR TO-DATE ---------------------------------------- ------------------------- 2004 2004 2003 2004 2003 REPORTED INCOME QTR 4 QTR 3 QTR 4 12 MONTHS 12 MONTHS ---------- ---------- ---------- ---------- ---------- Oil & Gas (a) 1,186 1,221 793 4,311 3,228 Chemicals 125 141 67 414 224 Corporate & other (71) (108) (172) (411) (620) ---------- ---------- ---------- ---------- ---------- Pre-tax income 1,240 1,254 688 4,314 2,832 Income tax expense Federal and state 260 278 153 945 673 Foreign (included in segments) (a) 206 217 152 763 558 ---------- ---------- ---------- ---------- ---------- Total 466 495 305 1,708 1,231 ---------- ---------- ---------- ---------- ---------- Income from continuing operations 774 759 383 2,606 1,601 ========== ========== ========== ========== ========== WORLDWIDE EFFECTIVE TAX RATE 38% 39% 44% 40% 43% 2004 2004 2003 2004 2003 CORE INCOME QTR 4 QTR 3 QTR 4 12 MONTHS 12 MONTHS ---------- ---------- ---------- ---------- ---------- Oil & Gas (a) 1,186 1,221 793 4,311 3,228 Chemicals 125 141 67 414 224 Corporate & other (192) (108) (172) (521) (559) ---------- ---------- ---------- ---------- ---------- Pre-tax income 1,119 1,254 688 4,204 2,893 Income tax expense Federal and state 243 278 153 952 694 Foreign (included in segments) (a) 206 217 152 763 558 ---------- ---------- ---------- ---------- ---------- Total 449 495 305 1,715 1,252 ---------- ---------- ---------- ---------- ---------- Income from continuing operations 670 759 383 2,489 1,641 ========== ========== ========== ========== ========== WORLDWIDE EFFECTIVE TAX RATE 40% 39% 44% 41% 43% (a) Revenues and income tax expense include taxes owed by Occidental but paid by governmental entities on its behalf. Oil and gas pre-tax income includes the following revenue amounts by periods. 2004 2004 2003 2004 2003 QTR 4 QTR 3 QTR 4 12 MONTHS 12 MONTHS ---------- ---------- ---------- ---------- ---------- 143 149 102 525 397 6

Investor Relations Supplemental Schedules [OXY LOGO] REVISED FEBRUARY 8, 2005 OCCIDENTAL PETROLEUM 2004 Fourth Quarter Net Income (Loss) Reported Income Comparison FOURTH THIRD QUARTER QUARTER 2004 2004 B / (W) ---------- ---------- ---------- Oil & Gas $ 977 $ 1,003 $ (26) Chemical 130 139 (9) Corporate Interest expense, net - debt and trust preferred distributions (53) (59) 6 Other (18) (49) 31 Taxes (262) (275) 13 ---------- ---------- ---------- Income from continuing operations 774 759 15 Discontinued operations, net (32) (1) (31) ---------- ---------- ---------- Net Income $ 742 $ 758 $ (16) ========== ========== ========== Basic Earnings Per Common Share Income from continuing operations $ 1.94 $ 1.91 $ (0.03) Discontinued operations, net (0.08) -- $ (0.08) ---------- ---------- ---------- Net Income $ 1.86 $ 1.91 $ (0.05) ========== ========== ========== Worldwide Effective Tax Rate 38% 39% 1% ========== ========== ========== ================================================================================ OCCIDENTAL PETROLEUM 2004 Fourth Quarter Net Income (Loss) Core Earnings Comparison FOURTH THIRD QUARTER QUARTER 2004 2004 B / (W) ---------- ---------- ---------- Oil & Gas $ 977 $ 1,003 $ (26) Chemical 130 139 (9) Corporate Interest expense, net - debt and trust preferred distributions (53) (59) 6 Other (139) (49) (90) Taxes (245) (275) 30 ---------- ---------- ---------- Net Income $ 670 $ 759 $ (89) ========== ========== ========== Basic Earnings Per Common Share $ 1.68 $ 1.92 $ (0.24) ========== ========== ========== Worldwide Effective Tax Rate 40% 39% -1% ========== ========== ========== 7

Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM OIL & GAS CORE EARNINGS VARIANCE ANALYSIS ($ MILLIONS) 2004 4th Quarter $ 977 2004 3rd Quarter 1,003 ---------- $ (26) ========== Price Variance $ 36 Volume/Mix Variance (3) Exploration Expense Variance (51) All Others (8) ---------- TOTAL VARIANCE $ (26) ========== ================================================================================ OCCIDENTAL PETROLEUM CHEMICAL CORE EARNINGS VARIANCE ANALYSIS ($ MILLIONS) 2004 4th Quarter $ 130 2004 3rd Quarter 139 ---------- $ (9) ========== Sales Price $ 74 Sales Volume/Mix (8) Operations/Manufacturing (62) * All Others (13) ---------- TOTAL VARIANCE $ (9) ========== * Higher energy, feedstock costs and other manufacturing costs 8

Investor Relations Supplemental Schedules [OXY LOGO] REVISED FEBRUARY 8, 2005 OCCIDENTAL PETROLEUM 2004 Fourth Quarter Net Income (Loss) Reported Income Comparison FOURTH THIRD QUARTER QUARTER 2004 2004 B / (W) ---------- ---------- ---------- Oil & Gas $ 977 $ 640 $ 337 Chemical 130 72 58 Corporate Interest expense, net - debt and trust preferred distributions (53) (63) 10 Other (18) (109) 91 Taxes (262) (157) (105) ---------- ---------- ---------- Income from continuing operations 774 383 391 Discontinued operations, net (32) (1) (31) ---------- ---------- ---------- Net Income $ 742 $ 382 $ 360 ========== ========== ========== Basic Earnings Per Common Share Income from continuing operations $ 1.94 $ 0.99 $ 0.95 Discontinued operations, net (0.08) -- $ (0.08) ---------- ---------- ---------- Net Income $ 1.86 $ 0.99 $ 0.87 ========== ========== ========== Worldwide Effective Tax Rate 38% 44% 6% ========== ========== ========== ================================================================================ OCCIDENTAL PETROLEUM 2004 Fourth Quarter Net Income (Loss) Core Earnings Comparison FOURTH THIRD QUARTER QUARTER 2004 2004 B / (W) ---------- ---------- ---------- Oil & Gas $ 977 $ 640 $ 337 Chemical 130 72 58 Corporate Interest expense, net - debt and trust preferred distributions (53) (63) 10 Other (139) (109) (30) Taxes (245) (157) (88) ---------- ---------- ---------- Net Income $ 670 $ 383 $ 287 ========== ========== ========== Basic Earnings Per Common Share $ 1.68 $ 0.99 $ 0.69 ========== ========== ========== Worldwide Effective Tax Rate 40% 44% 4% ========== ========== ========== 9 Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM OIL & GAS CORE EARNINGS VARIANCE ANALYSIS ($ MILLIONS) 2004 4th Quarter $ 977 2003 4th Quarter 640 ---------- $ 337 ========== Price Variance $ 496 Volume/Mix Variance (31) Exploration Expense Variance (43) All Others (85) ---------- TOTAL VARIANCE $ 337 ========== ================================================================================ OCCIDENTAL PETROLEUM CHEMICAL CORE EARNINGS VARIANCE ANALYSIS ($ MILLIONS) 2004 4th Quarter $ 130 2003 4th Quarter 72 ---------- $ 58 ========== Sales Price $ 182 Sales Volume/Mix (3) Operations/Manufacturing (116) * All Others (5) ---------- TOTAL VARIANCE $ 58 ========== * Higher energy, feedstock costs and other manufacturing costs 10

Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM SUMMARY OF OPERATING STATISTICS FOURTH QUARTER TWELVE MONTHS ------------------------- ------------------------- 2004 2003 2004 2003 ---------- ---------- ---------- ---------- NET PRODUCTION PER DAY: United States Crude Oil and Liquids (MBL) California 81 82 78 81 Permian 152 152 154 150 Horn Mountain 13 25 19 21 Hugoton 3 4 3 4 ---------- ---------- ---------- ---------- TOTAL 249 263 254 256 Natural Gas (MMCF) California 242 246 237 252 Hugoton 125 130 127 138 Permian 125 133 130 129 Horn Mountain 7 16 13 13 ---------- ---------- ---------- ---------- TOTAL 499 525 507 532 Latin America Crude Oil (MBL) Colombia 37 44 37 37 Ecuador 44 39 46 25 ---------- ---------- ---------- ---------- TOTAL 81 83 83 62 Middle East Crude Oil (MBL) Oman 13 12 13 12 Qatar 48 40 45 45 Yemen 30 33 32 35 ---------- ---------- ---------- ---------- TOTAL 91 85 90 92 Natural Gas (MMCF) Oman 66 -- 55 - Other Eastern Hemisphere Crude Oil (MBL) Pakistan 6 9 7 9 Natural Gas (MMCF) Pakistan 79 72 75 74 Barrels of Oil Equivalent (MBOE) - --------------------------------------------- Subtotal consolidated subsidiaries 534 540 540 520 Other interests Colombia - minority interest (5) (7) (4) (5) Russia - Occidental net interest 27 30 29 30 Yemen - Occidental net interest 2 2 1 2 ---------- ---------- ---------- ---------- Total worldwide production (MBOE) 558 565 566 547 ========== ========== ========== ========== 11 Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM SUMMARY OF OPERATING STATISTICS FOURTH QUARTER TWELVE MONTHS ------------------------- ------------------------- 2004 2003 2004 2003 ---------- ---------- ---------- ---------- OIL & GAS: - ---------- PRICES UNITED STATES Crude Oil ($/BBL) 42.76 28.47 37.72 28.74 Natural gas ($/MCF) 5.65 4.42 5.35 4.81 LATIN AMERICA Crude Oil ($/BBL) 36.47 27.05 33.09 27.21 MIDDLE EAST Crude Oil ($/BBL) 37.44 28.57 34.88 27.81 Natural Gas ($/MCF) 0.96 -- 0.97 -- OTHER EASTERN HEMISPHERE Crude Oil ($/BBL) 37.09 26.98 33.13 26.61 Natural Gas ($/MCF) 2.01 2.25 2.25 2.04 TOTAL WORLDWIDE Crude Oil ($/BBL) 39.11 27.40 35.09 27.25 Natural Gas ($/MCF) 4.68 4.13 4.56 4.45 FOURTH QUARTER TWELVE MONTHS ------------------------- ------------------------- 2004 2003 2004 2003 ---------- ---------- ---------- ---------- EXPLORATION EXPENSE Domestic $ 53 $ 32 $ 136 $ 102 Latin America 19 4 23 12 Middle East 1 2 16 14 Other Eastern Hemisphere 15 7 44 11 ---------- ---------- ---------- ---------- TOTAL $ 88 $ 45 $ 219 $ 139 ========== ========== ========== ========== 12

Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM CHEMICALS Volume (M Tons, except PVC Resins) FOURTH QUARTER TWELVE MONTHS ------------------------- ------------------------- MAJOR PRODUCTS 2004 2003 2004 2003 ---------- ---------- ---------- ---------- Chlorine 716 702 2,892 2,733 Caustic 763 711 3,109 2,764 Ethylene Dichloride 134 172 458 546 PVC Resins (millions of pounds) 1,003 1,010 4,208 3,954 CHEMICALS Prices (Index) FOURTH QUARTER TWELVE MONTHS ------------------------- ------------------------- MAJOR PRODUCTS 2004 2003 2004 2003 ---------- ---------- ---------- ---------- Chlorine 2.36 1.65 2.05 1.72 Caustic 1.18 0.80 0.84 0.84 Ethylene Dichloride 1.75 1.10 1.56 1.16 PVC Resins 1.20 0.86 1.08 0.89 1987 through 1990 average price = 1.00 CHLORINE - -------- OXYCHEM COMMENTARY - ------------------ o As contract terms permitted, OxyChem fully implemented the $20 per ton price increase announced in the 3rd quarter. o OxyChem announced an additional $20 per ton increase to be effective December 1 to most accounts. Other U.S. chlor-alkali producers announced similar increases. Market conditions are expected to remain favorable for the successful implementation of the announced price increase. o 1st quarter operating rates are expected to remain at capacity as the seasonal demand for downstream products improves. o Order control programs for chlorine are still in effect and are expected to remain so through the 1st quarter for OxyChem and other U.S. producers. INFLUENCING FACTORS: - -------------------- The normal seasonal decline in demand has made it easier to avoid customer shutdowns. The availability of spot chlorine indicates a further balancing of supply and 13 Investor Relations Supplemental Schedules [OXY LOGO] demand. However, spot chlorine remains limited and pricing is at or above current contract levels. Increased chlorine consumption into downstream derivatives in the 1st quarter is expected to tighten the supply/demand balance. CAUSTIC - ------- OXYCHEM COMMENTARY - ------------------ o Caustic soda sales remained strong in the 4th quarter and consistent with 3rd quarter volumes fueled by demand in the alumina, organic and refining markets. Sales into the bleach market did experience the customary seasonal decline. o OxyChem successfully implemented in the 4th quarter the $110 DST price increase announced in the 3rd quarter. An additional increase of $50 DST was announced November 1st. Market conditions are expected to remain favorable for the successful implementation of the announced price increase in the 1st quarter of 2005. o U.S. Gulf Coast producers settled the alumina pricing for the first half of 2005 at $325 DMT FOB U.S. Gulf Coast. This represents a $211 DMT premium over the second half of 2004 and a $50 DMT premium over that of Asian producers' pricing for the first half of 2005. o Order control programs for liquid caustic soda remained in effect through the 4th quarter and are expected to continue into 2005. INFLUENCING FACTORS: - -------------------- The supply/demand balance projected for the 1st quarter is expected to lend support for future price increases. Continuing improvement in the U.S. manufacturing sector will keep liquid caustic soda demand in line with supply. EDC - --- OXYCHEM COMMENTARY - ------------------ o EDC pricing continued in an upward trend through mid-November when PVC pricing moderated in China. o Despite a balanced to tight supply/demand balance, EDC pricing moderated to mid-3rd quarter levels, maintaining the gap between EDC and PVC prices. o Scheduled VCM outages in December coupled with seasonally lower PVC demand in Asia reduced the need for EDC late in the 4th quarter. 14

Investor Relations Supplemental Schedules [OXY LOGO] INFLUENCING FACTORS: - -------------------- The supply/demand balance for EDC in Asia is expected to tighten late in the 1st quarter after the Chinese New Year period in February. Improved demand for EDC and its downstream vinyl derivatives is also expected to result in increased EDC pricing. Chlorine availability within the U.S. for EDC production will tighten as seasonal demand for chlorine increases. PVC/VCM - ------- OXYCHEM COMMENTARY - ------------------ o OxyChem's 4th quarter operating rate fell to 90% from a 3rd quarter average of 95% due to scheduled 4th quarter outages at three PVC plants. o A strong domestic and export market in the 4th quarter resulted in increased operating rates for PVC and minimal inventory build by producers as they tried to prepare for the seasonal spring surge in demand. o Strong PVC demand and low operating rates at Pemex kept the VCM supply/demand balance tight. PVC production was interrupted at one Latin American producer due to VCM availability. o Westlake has restarted the Geismar VCM and PVC plants at reduced rates. It is expected that the plants will be brought up to a 50% operating rate in 2005. The Shintech Addis facility remains idle and is not expected to restart in 2005. o Domestic PVC resin prices were flat in October, increased $0.01 per pound in November and another $0.02 per pound in December. o PVC resin export prices weakened in December but closed the quarter at $870 - $920 per metric ton CFR Southeast Asia. Normal seasonal decline in PVC demand was experienced in December. o Spot VCM export prices to Latin America closed the 4th quarter at $810 - $820 per metric ton FOB U.S. Gulf Coast. VCM shipments to Asia did not occur due to high freight rates in the range of $200 per metric ton. o Additional price increase for January has been announced for domestic PVC resin of $0.02 per pound. INFLUENCING FACTORS: - -------------------- Favorable domestic demand along with a seasonal rebound in the export market and moderation of energy costs will result in improved margins for the first half of 2005. 15

Investor Relations Supplemental Schedules [OXY LOGO] OCCIDENTAL PETROLEUM SUMMARY OF OPERATING STATISTICS FOURTH QUARTER TWELVE MONTHS ------------------------- ------------------------- CAPITAL EXPENDITURES ($MM) 2004 2003 2004 2003 ---------- ---------- ---------- ---------- Oil & Gas California $ 84 $ 73 $ 315 $ 228 Permian 83 78 289 265 Other - U.S. 25 10 55 47 Latin America 57 51 180 118 Middle East 218 180 768 556 Other Eastern Hemisphere 14 9 42 23 Chemicals 60 44 155 344 (a) Corporate 32 4 39 19 ---------- ---------- ---------- ---------- TOTAL $ 573 $ 449 $ 1,843 $ 1,600 ========== ========== ========== ========== (a) Includes $180 million for the buyout of a VCM plant lease and $44 million for buyout of railcar leases FOURTH QUARTER TWELVE MONTHS DEPRECIATION, DEPLETION & ------------------------- ------------------------- AMORTIZATION OF ASSETS ($MM) 2004 2003 2004 2003 ---------- ---------- ---------- ---------- Oil & Gas Domestic $ 156 $ 158 $ 622 $ 639 Latin America 24 19 96 61 Middle East 75 59 276 209 Other Eastern Hemisphere 12 15 47 48 Chemicals 61 56 243 203 Corporate 5 4 19 15 ---------- ---------- ---------- ---------- TOTAL $ 333 $ 311 $ 1,303 $ 1,175 ========== ========== ========== ========== 16

Investor Relations Supplemental Schedules [OXY LOGO] REVISED FEBRUARY 8, 2005 OCCIDENTAL PETROLEUM CORPORATE ($ millions) 31-DEC-04 31-DEC-03 --------------- --------------- CAPITALIZATION Oxy Long-Term Debt (including current maturities) $ 3,804 $ 4,016 Trust Preferred Securities -- 453 Subsidiary Preferred Stock 75 75 Others 26 26 --------------- --------------- TOTAL DEBT $ 3,905 $ 4,570 =============== =============== EQUITY $ 10,568 $ 7,929 =============== =============== Total Debt To Total Capitalization 27% 37% =============== =============== 17

Investor Relations Supplemental Schedules [OXY LOGO] Statements in this filing that contain words such as "will", "expect" or "estimate", or otherwise relate to the future, are forward-looking and involve risks and uncertainties that could significantly affect expected results. Factors that could cause results to differ materially include, but are not limited to: global commodity pricing fluctuations and supply/demand considerations for oil, gas and chemicals; higher-than-expected costs; political risk; and not successfully completing (or any material delay in) any expansion, capital expenditure, acquisition, or disposition. Occidental disclaims any obligation to update any forward-looking statements. The United States Securities and Exchange Commission (SEC) permits oil and natural gas companies, in their filings with the SEC, to disclose only proved reserves demonstrated by actual production or conclusive formation tests to be economically producible under existing economic and operating conditions. We use certain terms in this presentation, such as probable, possible and recoverable reserves, that the SEC's guidelines strictly prohibit us from using in filings with the SEC. U.S. investors are urged to consider carefully the disclosure in our Form 10-K, available through the following toll-free telephone number, 1-888-OXYPETE (1-888-699-7383) or on the Internet at http://www.oxy.com. You also can obtain a copy from the SEC by calling 1-800-SEC-0330. 18