EXHIBIT 99.1


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                                   [OXY LOGO]


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     By almost every measure, 2004 was an excellent year for Oxy. For the next
few minutes I want to touch on the highlights that made 2004 the best year in
Oxy's history and give a preview of the steps we are taking to enhance future
stockholder value.

     But first, I want to pay tribute to our employees and our management team.
Their performance was not only exemplary from a financial and operational
perspective, but also by their commitment to responsible corporate citizenship.


                                                                               1



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[OXY LOGO]                    2004'S RECORD RESULTS


     Record High Net Income                                    $2.6 Billion

     Record Low Debt-to-Capitalization Ratio                            27%

     Record High Stockholders' Equity                         $10.6 Billion

     Record High Oil & Gas Production                       207 Million BOE

     Record High Year-End Proved
     Oil & Gas Reserves                                     2.5 Billion BOE


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     2004 was a year of record achievements.

     Record oil and gas operating income and the highest operating income from
our chemicals business since 1997 pushed our consolidated net income to a record
high of $2.6 billion - beating the previous record set in 2000 by a billion
dollars after tax.

     We ended the year with the strongest balance sheet in the company's
history. The debt-to-capitalization ratio was at an all-time low of 27 percent,
and stockholders' equity grew to a record $10.6 billion.

     Worldwide oil and gas production hit a record high of 207 million barrels
of oil equivalent.

     We added more proved oil and gas reserves worldwide than we produced, and
ended the year with reserves at a record high level of over 2.5 billion
equivalent barrels.


                                                                               2



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[OXY LOGO]               FINANCIAL PERFORMANCE CRITERIA


          o    Return on Capital Employed

               -    Measures Efficient Use of Capital

          o    Return on Equity

          o    Total Return to Stockholders

          o    Stock Price Change Plus Dividend


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     However, the best measures of last year's results are reflected in the
financial criteria used to assess the company's overall performance relative to
the general market and to the oil and gas industry.

     Return on capital measures the efficient use of capital, which is critical
to building long-term value.

     Return on equity measures the profitability of a business as a percentage
of stockholders' equity.

     The performance measure that is most important to stockholders is the total
return they receive, which includes stock price change plus dividends.

     Let's look first at return on capital employed.


                                                                               3



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[OXY LOGO]                 RETURN ON CAPITAL EMPLOYED
                                    Percent


       [the following is a tabular representation of graphical materials]



                        OXY               S&P 500 OIL & GAS INDEX
              -----------------------     -----------------------
                                    
2004                    20                          15
2002-2004               15                          11
2000-2004               15                          12
1995-2004               11                           9


Data Source: Bloomberg


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     No company can be successful in building long-term value if it does not get
good returns on its invested capital.

     Last year, our return on capital employed of 20 percent compared favorably
to 15 percent for the Standard & Poor's 500 Oil and Index, which is made up of
20 oil and gas companies that are part of the broader S&P 500 Index.

     Our return on capital also exceeded the average return of the S&P Oil Index
over three years from 2002 through 2004, over five years from 2000 through 2004,
and over ten years from 1995 through 2004.


                                                                               4



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[OXY LOGO]                   RETURN ON COMMON EQUITY
                                    Percent

       [the following is a tabular representation of graphical materials]



                        OXY               S&P 500 OIL & GAS INDEX
              -----------------------     -----------------------
                                    
2004                    28                          22
2002-2004               22                          15
2000-2004               25                          17
1995-2004               17                          12


Data Source: Bloomberg


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     Good returns on equity are synonymous with high profitability and strong
asset management.

     Like the return on capital, Oxy's return on equity compared favorably to
the S&P Oil Index last year, over three years, five years and ten years.


                                                                               5



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[OXY LOGO]                        TOTAL RETURNS
                                    Percent

       [the following is a tabular representation of graphical materials]



                        OXY               S&P 500 OIL & GAS INDEX          S&P 500 INDEX                 DOW JONES
              -----------------------     -----------------------     -----------------------     -----------------------
                                                                                      
2004                    41                          31                          11                           5
2002-2004              140                          14                          11                          15



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     From the standpoint of investors, the most important performance indicator
is the total return to stockholders. Last year, our total return of 41 percent
outperformed the S&P Oil Index return of 31 percent, and was substantially
higher than the 11 percent return of the S&P 500 Index and the 5 percent return
of the Dow Jones Industrial companies.

     As you can see, our total return of 140 percent for three years from 2002
through 2004 was ten times higher than the Oil Index, 13 times higher than the
S&P 500, and nine times higher than the Dow.


                                                                               6



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[OXY LOGO]                        TOTAL RETURNS
                                    Percent

       [the following is a tabular representation of graphical materials]



                        OXY               S&P 500 OIL & GAS INDEX          S&P 500 INDEX                 DOW JONES
              -----------------------     -----------------------     -----------------------     -----------------------
                                                                                      
2000-2004              220                           9                         -11                           5
1995-2004              346                          14                         212                         243



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     Any company can have a couple of good years under the right market
conditions, but the true test of a successful business strategy is sustaining a
high level of performance over the long-term.

     If you purchased Oxy stock five years ago at the beginning of 2000, held on
to it through 2004 and reinvested the dividends, you would have realized a total
return over the five years of 220 percent versus 9 percent for the S&P Oil
Index, a loss of 11 percent for the entire S&P Index and a five percent return
for the Dow Jones Industrials.

     If you bought Oxy stock in 1995 and held it through 2004, your total return
over ten years of 346 percent was 25 times higher than the 14 percent return for
the S&P Oil Index. Over the same ten-year period Oxy's total return was 134
percent higher than the overall S&P Index's 212 percent and 103 percent higher
than the Dow's 243 percent.


                                                                               7



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[OXY LOGO]                  NET CASH OF $5.8 BILLION


                                                                 $ Billions
                                                                 ----------
     Revenues                                                    $     11.5
     Production & Overhead Costs                                       -5.7
     ----------------------------------------------------------------------
     Net Cash                                                    $      5.8


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     Last year Oxy had revenues of $11.5 billion. After deducting the costs of
production and overhead expenses totaling $5.7 billion, we had net cash of $5.8
billion.

     An investment firm that recently initiated coverage of Oxy referred to the
company as a "Cash Generation Machine."


                                                                               8



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[OXY LOGO]                       2004 CASH USES


                                                     $ Millions     Percent
     ----------------------------------------------------------------------
     Net Cash Available                                   5,805         100
     ----------------------------------------------------------------------
     Capital Spending & Acquisition Costs                 1,945          34
     Debt Reduction                                       1,200          21
     Taxes                                                  930          16
     Dividends                                              424           7
     Interest Expense                                       230           4
     ----------------------------------------------------------------------
     Cash Build                                             765          13
     ----------------------------------------------------------------------


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     Let's look now at how we used the cash. As you saw on the previous slide we
had available $5.8 billion of net cash. We used $1.9 billion, or 34 percent of
the cash, for capital spending and acquisitions. Debt reduction of $1.2 billion
accounted for 21 percent. We paid taxes of $930 million, which accounted for 16
percent. Dividend payments of $424 million used 7 percent of the cash. We used
$230 million, or 4 percent, to pay the interest on our debt.

     After accounting for all expenditures, we still had $765 million, or 13
percent of the total, which we can use in the future to reduce debt, pay
dividends, purchase stock or invest in new profitable growth projects.

     Next, I want to focus briefly on two items shown here --- debt reduction
and dividends.


                                                                               9



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[OXY LOGO]                       DEBT REDUCTION
                                   Total Debt
                                   $ Millions


       [the following is a tabular representation of graphical materials]



                            DEBT-TO
                        CAPITALIZATION
YEAR     TOTAL DEBT          RATIO
- ----     ----------     --------------
                  
2000     $    6,354                57%
2001     $    4,890                46%
2002     $    4,759                43%
2003     $    4,570                37%
2004     $    3,905                27%



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     Since 2000, we have improved our financial leverage by paying off nearly
$2.5 billion of debt. This reduced our debt-to-capitalization ratio from 57
percent at the end of 2000 to 27 percent at the end of last year.

     As I will show you shortly, we have continued to lower our debt level and
our debt-to-capitalization ratio in the first quarter this year.


                                                                              10



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[OXY LOGO]                      INTEREST EXPENSE


                                   $ Millions

       [the following is a tabular representation of graphical materials]



YEAR     INSTEREST EXPENSE
- ----     -----------------
      
2000                   546
2001                   432
2002                   320
2003                   272
2004                   229 (improvement of 317)


o    Impact of $317 Million in Pre-Tax Interest Savings

o    Net After-Tax Improvement of $0.52 per Share


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     Lower debt means lower interest payments. Our pre-tax annual interest
expense was $317 million less in 2004 than in 2000. The net after-tax
improvement is 52 cents per share.

     With less interest to worry about, we were able to look more favorably at
the prospect of increasing dividends. Last year we paid out $424 million in
dividends.


                                                                              11



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[OXY LOGO]                          DIVIDENDS

                                 Cash Dividends
                          Paid Continuously Since 1975


     o    2002-2004 Dividend Payments
          Totaled Nearly $1.2 Billion

     o    Annual Payout Rates Per Common Share

          -    2002 = $1.00

          -    2003 = $1.04

          -    2004 = $1.10

          -    2005 = $1.24

     o    Dividend Policy Evaluated Annually


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     Oxy has paid cash dividends continuously since 1975. Over the past three
years, dividend payments have totaled nearly $1.2 billion.

     The annual payout rate has increased three times since 2002, from one
dollar per common share in 2002 to $1.24 in 2005. The increase we announced in
February is expected to raise our total 2005 payout above last year's level by
$50 million.

     As we have said repeatedly, the board will review dividend policy annually
as part of our commitment to increase total returns for our shareholders. As we
continue to strengthen our financial position, our stockholders can be
optimistic about the potential for future dividend increases.


                                                                              12



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[OXY LOGO]               PRODUCTION & RESERVE ADDITIONS
                                  Million BOE

       [the following is a tabular representation of graphical materials]



YEAR     PRODUCTION     ADDITIONS
- ----     ----------     ---------
                  
2001            173           244
2002            188           263
2003            200           368
2004            207           268



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     When a company achieves the kind of results we have, investors want to know
if and how we will be able to sustain that high level of performance in the
future. I am confident we can because we have paid close attention to the
fundamentals by keeping our oil and gas production and reserve base growing. We
also are paying close attention to our profit margins in both our oil and gas
and chemical businesses.

     The green columns show that our worldwide oil and gas production has grown
by an annual average of over 6.5 percent since 2001. This kind of sustained
growth is unusual in the contemporary oil and gas industry.

     At the same time, the orange columns show that we are adding worldwide oil
and gas reserves from all sources at a rate well in excess of our production.
During the last four years, our worldwide production totaled 768 million
equivalent barrels, while our worldwide proved reserve additions surpassed 1.1
billion equivalent barrels.


                                                                              13



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[OXY LOGO]                  WORLDWIDE PROVEN RESERVES
                                  Million BOE


       [the following is a tabular representation of graphical materials]



                    2001         2002         2003         2004
                  --------     --------     --------     --------
                                             
International        1,698        1,755        1,804        1,844
United States          543          556          667          688
                  --------     --------     --------     --------
Total                2,241        2,311        2,471        2,532



                                 Horn Mountain
                                    [photo]


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     Our success in adding new reserves at a pace well ahead of production has
increased our total proved reserves to historical highs in each of the last four
years.

     Domestic reserves, shown in green, accounted for more than 70 percent of
our worldwide total during this period. The predominance of our large, low-risk
domestic base with modest development costs provides a solid portfolio to
generate the cash flow needed to support future growth opportunities.


                                                                              14



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[OXY LOGO]                 FINDING & DEVELOPMENT COSTS
                               2000-2004 Average


                                                                      $/BOE
     ----------------------------------------------------------------------
     Oxy                                                               4.43
     ----------------------------------------------------------------------
     XTO Energy                                                        6.14
     Apache                                                            7.02
     Burlington Resources                                              7.18
     Noble Energy                                                      7.36
     EOG Resources                                                     7.81
     Anadarko                                                          8.02
     Pioneer Natural Resources                                         8.27
     Unocal                                                            8.34
     Devon                                                             9.10
     Kerr-McGee                                                        9.52
     Pogo Producing                                                   10.75
     Newfield Exploration                                             12.85

     Source: Lehman Brothers Equity Research


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     Lehman Brothers recently issued a report on the finding and development
cost of the 14 exploration and production companies shown here. As you can see,
Oxy's average finding and development cost of $4.43 per BOE for the five years
from 2000 through 2004 was the lowest in this group of companies.

     Keeping our finding and development cost low is one of the keys to
maintaining a competitive edge in terms of future profitability.


                                                                              15

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[OXY LOGO]               2002-2004 AVERAGE PROFITABILITY
                                     $/BOE


       [the following is a tabular representation of graphical materials]



STOCK SYMBOL     AVERAGE PROFITABILITY
- ------------     ---------------------
              
     OXY                 10.59
     APA                  8.69
     APC                  8.37
     BR                   7.98
     XOM                  7.69
     CVX                  7.52
     COP                  7.12
     DVN                  7.05
     ECA                  6.90
     MRO                  6.72
     BP                   6.18
     UCL                  5.62
     KMG                  3.48
     AHC                  2.44



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     Our industry-leading profit of $10.59 per equivalent barrels for 2002
through 2004 is nearly 60 percent higher than the average among our competition.
Oxy's profits per barrel led the industry in each of the last six years.

     This performance measure speaks to both the quality of our assets and the
efficiency of our operations. Above all, it demonstrates the durability of both
our business model and our strategy to deliver sustainable results.


                                                                              16



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[OXY LOGO]                     CHEMICAL HIGHLIGHTS


                               Primary Mission of
                            Oxy's Chemicals Business

          ------------------------------------------------------------
                         Generate Cash Flow In Excess of
                          Capital Expenditures Through
                               the Business Cycle
          ------------------------------------------------------------

     o    Generated Nearly $3 Billion of Cash Flow
          After Capital During the Last 10 Years

     o    Generated Over $500 Million of Cash Flow
          After Capital in 2004


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     Let's turn briefly to our chemicals business which had an excellent year in
2004. The primary mission of our chemical business is to generate cash flow in
excess of capital expenditures.

     Over the past 10 years, our chemical business has generated almost $3
billion of cash flow in excess of capital expenditures. Last year alone, this
business produced more than $500 million of cash flow after capital.

     2005 has the potential to be an even better year --- and the outlook for
2006 also looks favorable.


                                                                              17



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[OXY LOGO]                 CHEMICALS - MARKET POSITION
                        Product Ranking by Market Share

                                                                     North
                                                    Global          America
                                                    ------          -------
     Chlorinated Isocyanurates                        # 1             # 1
     Ethylene Dichloride                              # 1             # 1
     Potassium Chemicals                              # 1             # 1
     Resorcinol                                       # 1             # 1
     Vinyl Chloride Monomer (VCM)                     # 1             # 1
     Chlorine and Caustic Soda                        # 2             # 2
     Sodium Silicates                                 # 2             # 2
     Polyvinyl Chloride (PVC)                         # 3             # 2


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     We have very strong positions in each of our major chemical product
markets. As you can see, Oxy is the number one or two in market share globally
or in North America in all of our key product areas. These products represent
approximately 90 percent of our total chemicals sales.

     Our size in these markets gives us economies of scale to meet the challenge
from our competitors. If the U.S. and global economies remain strong, we expect
our chemicals business to continue to produce good financial results.


                                                                              18



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[OXY LOGO]                  1ST QUARTER 2005 RESULTS
                              Consolidated Results


     Net Income                                                $846 Million

     Earnings per Share                                         $2.11/Share

     Cash from Operations                                      $1.2 Billion

     Stockholders' Equity                                     $11.2 Billion


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     The momentum we developed in our oil and gas and chemicals businesses last
year has carried over into the first quarter, resulting in the highest quarterly
earnings in Oxy's history.

     Our consolidated net income was $846 million, or $2.11 per share. Cash from
operations was approximately $1.2 billion. Stockholders' equity rose to yet
another record high of $11.2 billion, which was an increase of nearly $700
million compared to the end of 2004.

     Our strong balance sheet, including our large cash position, provides a
high degree of financial flexibility in funding new opportunities for profitable
growth.


                                                                              19



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[OXY LOGO]                        PREMCOR SALE


     o    Valero Energy Announces Purchase of Premcor
          For $73.25 per Share (4/25/05)

          -    Oxy Owns Just Over 9 Million Premcor Shares

          -    Oxy's Premcor Investment -- $10.75 per Share

     o    Financial Impact of Premcor Sale on Oxy

          -    After-Tax Cash Proceeds = $480 Million

          -    Net After-Tax Gain = $360 Million

               o    $0.90 per Share


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     On April 25, Valero Energy announced that it was purchasing Premcor for a
price of $73.25 per share. Oxy owned just over nine million Premcor shares at
the end of the first quarter. Oxy paid $10.75 per share for its Premcor
holdings. When this transaction closes, Oxy will realize cash proceeds after
taxes of approximately $480 million. This will result in a net after-tax gain
for Oxy of approximately $360 million, or $0.90 per share based on the number of
Oxy's outstanding shares at the end of the first quarter.


                                                                              20



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[OXY LOGO]                     NON-CORE INVESTMENT


                                                                 $ Millions
                                                                   4/29/05
                                                                 ----------
     [LYONDELL LOGO]     41.3 Million Shares (17%)                    1,035

                                    [PHOTO]


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     Occidental also has another significant potential source of cash
represented by our investment in Lyondell Chemical Company. We hold
approximately 17 percent of the common shares of Lyondell.

     As of April 29, these shares had a market value of $1 billion.


                                                                              21



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[OXY LOGO]                        WHAT'S AHEAD?

     o    Success Riding on Two Factors

          -    Take Care of Our Asset Base to Generate
               Cash to Support Growth

          -    Continue Adding Profitable New Projects

     o    Stay Focused on The Fundamentals

          -    Maintain Financial Discipline and Focus

          -    Execute Our Strategy

          -    Balance Growth with Profitability

     o    Create Long-Term Value


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     The company's future success depends on two factors. First, we must
continue to develop our asset base in order to generate the cash to support our
strategy of building long-term growth. Second, we must continue to add
profitable new projects to our portfolio. We believe the interests of our
stockholders are best served by remaining focused on these fundamentals.

     Our strength has been our financial discipline and focus in executing our
strategy that balances long-term growth with near-term profitability. We believe
the investments we are making in projects now will yield profitable growth
opportunities and stockholder value for many years.

     We are currently working on several domestic and international projects.
Let's talk first about the domestic projects.


                                                                              22



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[OXY LOGO]                 PERMIAN BASIN ACQUISITIONS
                               First Quarter 2005


     o    Spent $300 Million on Two Asset Acquisitions

          -    Gas Accounts for a Majority of the Reserves
               and Production

     o    Production Impact

          -    Estimated Year-End 2005 Exit Rate

               o    40 Million Cubic Feet of Gas/Day

               o    3,300 Barrels of Oil/Day

               o    10,000 BOE/Day


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     We continue to build on our strong base in the Permian Basin. In the first
quarter of this year, we completed two acquisitions for a total purchase price
of about $300 million.

     We expect these assets, two-thirds of which are natural gas, to add
production of approximately 40 million cubic feet per day of gas and 3,300
barrels of oil per day -- for a combined year-end 2005 exit rate of 10,000 BOE
per day.


                                                                              23



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[OXY LOGO]                 PERMIAN BASIN ACQUISITIONS
                              Second Quarter 2005


     o    Advanced Stages of Negotiations for a Larger
          Permian Acquisition

     o    Projected Production Impact

          -    Estimated Year-End 2005 Exit Rate

               o    16,000 BOE/Day


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     In addition, we currently are in the advanced stages of negotiations for a
larger Permian acquisition. We expect to have an announcement by the end of this
month.

     We expect this acquisition to add approximately 16,000 equivalent barrels
per day to our year-end exit rate.


                                                                              24



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[OXY LOGO]                 PERMIAN BASIN ACQUISITIONS


                   Total Reserves for All Three Acquisitions:

                            At least 130 Million BOE

                                    [PHOTO]


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     These acquisitions are expected to result in combined total proved reserve
additions to Oxy, net of asset sales, of at least 130 million equivalent
barrels.

     With these acquisitions and other projects that are moving forward, I am
very comfortable stating that we will more than replace our 2005 production.


                                                                              25



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[OXY LOGO]                 PERMIAN ACQUISITIONS IMPACT


                                2005 Production
                                   (BOE/Day)

     o    1st Quarter Average

          -    Worldwide = 565,000

     o    Projected Year-End Exit Rate                    [PHOTO]

          -    New Permian Assets = 26,000

     o    Projected Year-End Exit Rate

          -    Worldwide = 600,000


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     During the first quarter, Oxy's worldwide production averaged 565,000
equivalent barrels per day.

     The combined production from our 2005 Permian acquisitions, when added to
our first quarter production, is expected to raise our total production when
fully operational to 591,000 equivalent barrels per day. This will put us well
within reach of achieving our targeted year-end exit rate of 600,000 equivalent
barrels.

     In addition to these domestic projects, we are working on three major
international projects -- the Dolphin Gas Project in the Middle East, a new
exploration venture in Libya and a large enhanced oil recovery project in Oman.


                                                                              26



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[OXY LOGO]                     DOLPHIN GAS PROJECT
                             Projected Start - 2006


     Invest Gross Capital
     of $4 Billion
     (2004-2006)
     o    Oxy's Share is 24.5%                        [MAP]

     Gross Reserves:
     o    50 Trillion Cubic Ft.


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

     Work is moving forward on schedule for the $4 billion Dolphin Gas Project
in which Occidental has a 24.5-percent interest.

     This is one of the largest projects of its kind in the world. Approximately
50 trillion cubic feet of gas is committed to this project over the 25 year life
span of the contract. To put this in perspective, the gross gas reserves that
will support the Dolphin Project are equal to 25 percent of total U.S. proved
gas reserves of 200 trillion cubic feet.


                                                                              27



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[OXY LOGO]                     DOLPHIN GAS PROJECT
                           Oxy's Peak Net Production


     o    Oxy's Production

          -    275 Million Cubic Ft./Day

          -    20,000 Barrels Liquids/Day

          -    Equals 65,000 BOE/Day

          -    Contracts in Place for 2 Billion Cubic Ft./Day

     o    Phase 2

          -    Working on Contracts for an Additional Billion
               Cubic Feet/Day

          -    Scheduled Start-Up 2009 - 2010


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


     When this project is fully operational, we expect Occidental's net share of
production to be about 275 million cubic feet of gas per day and 20,000 barrels
of liquids per day, for a combined daily rate of 65,000 equivalent barrels.

     We already have contracts in place for 2 billion cubic feet per day, which
is equal to 36 percent of the 5.5 billion cubic feet per day currently used by
California consumers.

     And we are now working to secure contracts for an additional billion cubic
feet on top of the initial 2 billion cubic feet. The second phase of this
project is expected to come on stream in 2009 - 2010.


                                                                              28



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[OXY LOGO]                       RETURN TO LIBYA


                                     [MAP]


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


     In January 2005, Oxy was the big winner in Libya's first oil and gas
licensing round since the U.S. lifted economic sanctions in April 2004.

     Oxy and its partners were awarded interests in nine blocks out of a total
of 15 blocks that were offered. The five onshore blocks are shown in blue, and
four offshore blocks are shown in green.

     The Government of Abu Dhabi is Oxy's strategic partner in each of the
blocks through its ownership of Liwa Energy, which holds a 10-percent interest.
Exploration contracts were signed on March 6 with Libya's National Oil
Corporation for all nine blocks, which cover an area of 47,000 square miles.

     Work will soon begin on these blocks, starting with the acquisition of
seismic data.


                                                                              29



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[OXY LOGO]                 OMAN - MUKHAIZNA OIL FIELD


                                                 o    Oxy Active in Oman
                                                      Since 1979
                                                      -    1st Quarter 2005
                [MAP]                                      Production

                                                      -    32,000 BOE/Day

                                                 o    Oxy Signs 30-Year
                                                      Production Sharing
                                                      Contract for Oman's
                                                      Mukhaizna Oil Field


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


Occidental has been active in Oman since 1979. During the first quarter 2005,
Occidental's daily net production in Oman averaged 23,000 barrels of oil and 56
million cubic feet of gas, for a combined rate of 32,000 barrels of oil
equivalent.

Last week, we signed an important "heads of agreement" with the Government of
Oman to become the operator of the Mukhaizna oil field, which is one of the
largest oil fields in Oman. The life of the agreement is 30 years.

Oxy's partner in this large-scale development project is the Government of Abu
Dhabi through it's ownership of Liwa Energy, which, as I just mentioned, is also
our partner in Libya.

As you can see on the map, the field is located in central Oman. Mukhaizna was
discovered in 1975 by Petroleum Development Oman, known by the acronym PDO.


                                                                              30

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[OXY LOGO]                 OMAN - MUKHAIZNA OIL FIELD
                                Project Overview


     o    Current Production

          -    10,000 Barrels of Oil/Day

     o    Future Investment

          -    $2 Billion (Gross)

     o    Future Production Target

          -    150,000 Barrels of Oil/Day (Gross)

     o    Ultimate Recovery

          -    1 Billion Barrels Over Project Life


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


The field is currently producing approximately 10,000 barrels of oil per day.
Occidental and its partners expect to invest over U.S. $2 billion to implement a
large-scale steam flood to increase production to approximately 150,000 barrels
per day within the next few years and to recover approximately 1 billion barrels
of oil over the life of the project.

This is part of the continuing execution of our growth strategy in one of our
core areas. Occidental is an industry leader in increasing and prolonging
production from mature and under-developed fields by applying cutting-edge
technology and state-of-the-art reservoir management techniques.

We believe this an exciting opportunity to create value for our stockholders.


                                                                              31

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[OXY LOGO]                    CORPORATE GOVERNANCE


                     [GOVERNANCEMETRICS INTERNATIONAL LOGO]

                        GMI Rates 3,200 Global Companies
                        --------------------------------

     o    Oxy Ranks in the Top One Percent

     o    One of Only 34 Companies Awarded Top Score of 10

     o    Only Oil Company Awarded Top Score


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


     I'd like to say a few words about corporate governance which remains an
important topic among investors. Oxy's corporate governance practices have
continued to get high marks.

     GovernanceMetrics International, a corporate governance and ratings agency,
rated the governance practices of more than 3,200 global companies. Oxy's
corporate governance practices ranked in the top one percent. Occidental was one
of only 34 companies, and the only oil company, to receive a 10, which is GMI's
highest rating.


                                                                              32



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[OXY LOGO]                    CORPORATE GOVERNANCE


                   [INSTITUTIONAL SHAREHOLDER SERVICES LOGO]

                        ISS Rates All S&P 500 Companies
                        -------------------------------

     o    Oxy Awarded Score of 94.3 Among All S&P Companies

     o    Oxy Awarded Score of 96.9 Among S&P
          Energy Companies


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


     In April 2005, Institutional Shareholder Services, the world's leading
provider of proxy voting and corporate governance services, awarded Oxy a score
of 94.3 among companies in the S&P 500 and 96.9 for companies in the energy
industry.

     This means that Oxy outperformed 94 percent of all the S&P 500 companies
and 97 percent of the S&P energy companies.


                                                                              33



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


[OXY LOGO]                    BUSINESSWEEK RANKING


                            Oxy Ranked #6 Among All
                                S&P 500 Companies

                                                        Criteria
                                                        --------

                                        o    1 & 3 Year

                                             -    Total Return
     [COVER OF
     BUSINESSWEEK]                           -    Sales Growth

                                             -    Profit Growth

                                        o    Profit Margins

                                        o    Return on Equity

                                        o    Debt-to-Capitalization Ratio


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


     Oxy also got high marks from two prominent business publications.

     BusinessWeek ranks the S&P 500 companies based on one-year and three-year
total returns, sales growth and profit growth. Other criteria include profit
margins and return on equity, with additional weight given for a company's
debt-to-capital ratio.

     Based on these criteria, we're pleased to report that Oxy ranked sixth
among all the S&P companies based on our overall performance.


                                                                              34



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


[OXY LOGO]                       FORTUNE RANKING


                              Oxy Ranked #2 Among
                        Oil Producing & Mining Companies

                                                        Criteria
                                                        --------

                                        o    Innovation

                                        o    People Management

                                        o    Financial Soundness
     [COVER OF
     FORTUNE]                           o    Quality of Management

                                        o    Use Of Corporate Assets

                                        o    Social Responsibility

                                        o    Long-term Investments

                                        o    Quality of Products & Services


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


     A recent Fortune edition featured "America's Most Admired Companies." Oxy
was ranked number two among the ten companies that comprised the mining and oil
producing companies category.

     Some 10,000 executives, directors and security analysts rated companies
based on eight attributes. They include innovation, people management, financial
soundness, quality of management, use of corporate assets, social
responsibility, long-term investments and quality of products and services.


                                                                              35



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


[OXY LOGO]                         CONCLUSION


                          Solid Base for Future Growth
                                And Profitability


     o    Strong, Flexible Balance Sheet

     o    Continued Oil & Gas Production Growth

     o    Long-Lived Domestic Oil & Gas Reserve Base

     o    New, High Potential Exploration Opportunities


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

     In conclusion, we have built a solid base for continued profitable growth.

o    We have a strong, flexible balance sheet to support new growth initiatives.

o    Our oil and gas production continues to grow.

o    We have long-lived domestic oil and gas reserves that can be developed with
     modest capital investments.

o    And, we are increasing our exposure to high potential exploration and
     enhanced oil recovery opportunities.

o    Notwithstanding our past achievements, more remains to be done.

o    Our record points to a level of financial and operating performance that we
     believe will continue to reward all those with a stake in our success.

     Last year I assured you that the best was yet to come. What followed was
     the best year in Oxy's history. Today, I want to tell you that I firmly
     believe our best years still lie ahead.


                                                                              36



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


                                   [OXY LOGO]


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


     I would now like to introduce Dr. Larry Meriage, our Vice President for
Communications and Public Affairs, who will present our report on social
responsibility.


                                                                              37



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


[OXY LOGO]              OCCIDENTAL PETROLEUM CORPORATION


     Statements in this presentation 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:
     exploration risks such as drilling of unsuccessful wells, 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. Additionally, the SEC requires oil and natural
     gas companies, in their filings, to disclose non-financial statistical
     information about their consolidated entities separately from that
     information about their equity holdings and not to show combined
     totals. Certain information in this presentation is shown on a
     combined basis; however, the information is disclosed separately in
     the Appendix. 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.


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


                                                                              38



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


[OXY LOGO]                          APPENDIX


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


                                                                              39



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


[OXY LOGO]              OCCIDENTAL PETROLEUM CORPORATION


               Worldwide Production & Proved Reserves Additions *
                                 (Million BOE)



(Million BOE)                 Consolidated Subsidiaries            Other Interests                    Worldwide
                             ---------------------------     ---------------------------     ---------------------------
                               OIL       GAS       BOE         OIL       GAS       BOE         OIL       GAS       BOE
                             -------   -------   -------     -------   -------   -------     -------   -------   -------
                                                                                      
PRODUCTION
2000                             117       259       160           8        --         8         125       259       168
2001                             124       241       164           9        --         9         133       241       173
2002                             142       229       180           8        --         8         150       229       188
2003                             153       221       190          10        --        10         163       221       200
2004                             159       233       198           9        --         9         168       233       207

Proved Reserve Additions
2000                           1,041       777     1,170          --        --        --       1,041       777     1,170
2001                             219       100       236           8        --         8         227       100       244
2002                             221       216       257           6        --         6         227       216       263
2003                             223       766       351          16         9        18          23       775       368
2004                             162       624       266           4        (9)        2         166       615       268


*See Slide 13


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


                                                                              40



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


[OXY LOGO]              OCCIDENTAL PETROLEUM CORPORATION


                   Worldwide Proved Reserves (Million BOE) *



                                           US                        International                     Worldwide
                              ---------------------------     ---------------------------     ---------------------------
2004                            OIL       GAS       BOE         OIL       GAS       BOE         OIL       GAS       BOE
- ----                          -------   -------   -------     -------   -------   -------     -------   -------   -------
                                                                                       
Consolidated Subsidiaries       1,494     2,101     1,844         499       874       645       1,993     2,975     2,489
Other Interests                    --        --        --          43        --        43          43        --        43
Worldwide                       1,494     2,101     1,844         542       874       688       2,036     2,975     2,532

2003
- ----
Consolidated Subsidiaries       1,500     1,826     1,804         490       759       617       1,990     2,585     2,421
Other Interests                    --        --        --          48         9        50          48         9        50
Worldwide                       1,500     1,826     1,804         538       768       667       2,038     2,594     2,471

2002
- ----
Consolidated Subsidiaries       1,452     1,821     1,755         476       228       514       1,928     2,049     2,269
Other Interests                    --        --        --          42        --        42          42        --        42
Worldwide                       1,452     1,821     1,755         518       228       556       1,970     2,049     2,311

2001
- ----
Consolidated Subsidiaries       1,371     1,962     1,698         482       106       499       1,853     2,068     2,197
Other Interests                    --        --        --          44        --        44          44        --        44
Worldwide                       1,371     1,962     1,698         526       106       543       1,897     2,068     2,241


*See Slide 14


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


                                                                              41



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


[OXY LOGO]              OCCIDENTAL PETROLEUM CORPORATION


               Oil & Gas Profitability - $ Millions except $/BOE



                                          Annual Average 2002 - 2004
Reconciliation to Generally     ----------------------------------------------
Accepted Accounting             Consolidated         Other
Principles (GAAP)               Subsidiaries       Interests        Worldwide
                                ------------     ------------     ------------
                                                         
Revenues                        $      5,797     $        148     $      5,945
Production costs                       1,171               91            1,262
Exploration expenses                     176                0              176
Other operating expenses                 314                8              321
DD&A                                     933               14              947
                                ------------     ------------     ------------
Pre-tax income                         3,203               35            3,238
Income tax expense                     1,109                9            1,118
                                ------------     ------------     ------------
Results of operations           $      2,095     $         26     $      2,120
                                ============     ============     ============

BOE Sales                                                               200.15

Revenues                                                          $      29.70
Production costs                                                          6.31
Exploration expenses                                                      0.88
Other operating expenses                                                  1.61
DD&A                                                                      4.73
                                                                  ------------
Pre-tax income                                                           16.18
Income tax expense                                                        5.59
                                                                  ------------
Results of operations                                             $      10.59
                                                                  ============


*See Slide 16


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


                                                                              42