OCCIDENTAL PETROLEUM CORP /DE/
S-3, 1998-12-21
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 21, 1998
                                                     REGISTRATION NO. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
 
                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
 
 
<TABLE>
<S>                           <C>                               <C>
OCCIDENTAL PETROLEUM                      DELAWARE                 95-4035997
 CORPORATION
OXY CAPITAL TRUST I                       DELAWARE                APPLIED FOR
OXY CAPITAL TRUST II                      DELAWARE                APPLIED FOR
OXY CAPITAL TRUST                         DELAWARE                APPLIED FOR
 III
<CAPTION>
(EXACT NAME OF REGISTRANT AS    (STATE OR OTHER JURISDICTION    (I.R.S. EMPLOYER
 SPECIFIED IN ITS CHARTER)    OF INCORPORATION OR ORGANIZATION)  IDENTIFICATION
                                                                      NO.)
</TABLE>
 
                           10889 WILSHIRE BOULEVARD
                         LOS ANGELES, CALIFORNIA 90024
                                (310) 208-8800
              (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
    INCLUDING AREA CODE, OF EACH REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               ----------------
 
                           DONALD P. DE BRIER, ESQ.
       EXECUTIVE VICE PRESIDENT, GENERAL COUNSEL AND CORPORATE SECRETARY
                       OCCIDENTAL PETROLEUM CORPORATION
                           10889 WILSHIRE BOULEVARD
                         LOS ANGELES, CALIFORNIA 90024
                                (310) 208-8800
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                  INCLUDING AREA CODE, OF AGENT FOR SERVICE)
 
                               ----------------
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time
to time after this Registration Statement becomes effective.
 
  If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the
following box. [_]
 
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or
interest reinvestment plans, please check the following box. [X]
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, please check the following box and list the
Securities Act registration statement number of the earlier effective
registration statement for the same offering. [_]
 
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [X]
 
                        (See Calculation of Registration Fee on following page)
 
                               ----------------
 
  THE REGISTRANTS HEREBY AMEND THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANTS
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(a) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(a), MAY DETERMINE.
 
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- -------------------------------------------------------------------------------
<PAGE>
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
- ----------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------
<CAPTION>
                                                       PROPOSED       PROPOSED
                                                       MAXIMUM        MAXIMUM
                                                      AGGREGATE      AGGREGATE     AMOUNT OF
     TITLE OF EACH CLASS OF          AMOUNT TO BE   OFFERING PRICE    OFFERING    REGISTRATION
 SECURITIES TO BE REGISTERED(1)    REGISTERED(1)(2)  PER UNIT(3)    PRICE(3)(4)      FEE(5)
- ----------------------------------------------------------------------------------------------
<S>                                <C>              <C>            <C>            <C>
Debt Securities.................
- ----------------------------------------------------------------------------------------------
Preferred Securities of
Oxy Capital Trust I,
Oxy Capital Trust II and
Oxy Capital Trust III...........
- ----------------------------------------------------------------------------------------------
Guarantees of Preferred Securi-
ties of Oxy Capital Trust I,
Oxy Capital Trust II and
Oxy Capital Trust III
by Occidental(4)................
- ----------------------------------------------------------------------------------------------
Total...........................    $1,400,000,000       100%      $1,400,000,000   $389,200
- ----------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------
</TABLE>
(1) Such indeterminate principal amount of Debt Securities and Guarantees and
    such indeterminate number of Preferred Securities as may from time to time
    be issued at indeterminate prices, with an aggregate public offering price
    not to exceed $1,400,000,000. Certain Debt Securities may be issued and
    sold to any or all of Oxy Capital Trust I, Oxy Capital Trust II and Oxy
    Capital Trust III, in which event such Debt Securities may later be
    distributed to the holders of Preferred Securities.
 
(2) In United States dollars or the equivalent thereof in one or more foreign
    currencies, composite currencies or currency units as shall result in an
    aggregate initial offering price for all securities of $1,400,000,000. If
    any of the Debt Securities are issued at a discount from their principal
    amount, the principal amount will be increased such that the aggregate
    initial offering price will equal $1,400,000,000.
 
(3) Estimated solely for the purpose of calculating the registration fee
    pursuant to Rule 457 of the rules and regulations under the Securities Act
    of 1933.
 
(4) Such amount represents (a) the principal amount of any Debt Securities
    issued at their principal amounts, (b) the issue price rather than the
    principal amount of any Debt Securities issued at an original issue
    discount, and (c) the issue price of any Preferred Securities.
 
(5) No separate consideration will be received for any Guarantees. The
    Guarantees include the rights of holders of Preferred Securities under the
    Guarantees and certain back-up undertakings, comprised of obligations of
    Occidental under the Indentures and any supplemental indentures thereto
    and pursuant to the Declarations of Trust to provide certain indemnities
    in respect of, and be responsible for certain costs, expenses, debts and
    liabilities of, each of Oxy Capital Trust I, Oxy Capital Trust II and Oxy
    Capital Trust III, each as described in the registration statement. All
    obligations under the Declarations of Trust, including the indemnity
    obligation, are included in the back-up undertakings.
<PAGE>
 
SUBJECT TO COMPLETION, DATED DECEMBER 21, 1998
 
PROSPECTUS
 
                                 $1,400,000,000
                                 [LOGO OF OXY] 
                        OCCIDENTAL PETROLEUM CORPORATION
 
            Senior Debt Securities and Subordinated Debt Securities
 
                              OXY CAPITAL TRUST I
                              OXY CAPITAL TRUST II
                             OXY CAPITAL TRUST III
 
       Preferred Securities Guaranteed To The Extent Set Forth Herein By
                        Occidental Petroleum Corporation
 
- --------------------------------------------------------------------------------
OCCIDENTAL:
 
 .  will pay principal, premium (if any) and interest on its senior debt
   securities and, subject to payment of its senior debt securities, on its
   subordinated debt securities; and
 .  will guarantee the payment by each trust of the preferred securities based
   on several obligations described in this prospectus.
 
THE TRUSTS:
Oxy Capital Trust I, Oxy Capital Trust II and Oxy Capital Trust III are
Delaware business trusts. Each trust will:
 .  sell preferred securities (representing undivided beneficial interests in
   the trust) to the public;
 .  sell common securities (representing undivided beneficial interests in the
   trust) to Occidental;
 .  use the proceeds from these sales to buy an equal amount of subordinated
   debt securities of Occidental; and
 .  distribute the cash payments it receives on the subordinated debt securities
   it owns to the holders of the preferred and common securities.
 
We will provide the specific terms of these securities in supplements to this
prospectus. You should read this prospectus and any supplement carefully before
you invest.
 
- --------------------------------------------------------------------------------
Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if
this prospectus or the accompanying prospectus supplement is truthful or
complete. Any representation to the contrary is a criminal offense.
- --------------------------------------------------------------------------------
 
   THIS PROSPECTUS MAY NOT BE USED TO SELL SECURITIES UNLESS ACCOMPANIED BY A
                             PROSPECTUS SUPPLEMENT.
 
                  The date of this prospectus is      , 199 .
 
The information in this prospectus is not complete and may be changed. We may
not sell these securities until the registration statement filed with the
Securities and Exchange Commission is effective. This prospectus is not an
offer to sell these securities and we are not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Forward-Looking Statements................................................    2
About This Prospectus.....................................................    3
Where You Can Find More Information.......................................    4
Occidental................................................................    5
The Trusts................................................................    5
Use of Proceeds...........................................................    6
Ratios of Earnings to Fixed Charges and Earnings to Combined Fixed Charges
 and Preferred Stock Dividends............................................    6
Description of Securities.................................................    6
Description of Senior Debt Securities.....................................    7
Description of Subordinated Debt Securities...............................   16
Description of Preferred Securities.......................................   24
Description of Preferred Securities Guarantees............................   29
Relationship among Preferred Securities, Preferred Securities Guarantees
 and Subordinated Debt Securities Held by Each Trust......................   32
Plan of Distribution......................................................   33
Legal Opinions............................................................   34
Experts...................................................................   34
</TABLE>
 
                           FORWARD-LOOKING STATEMENTS
 
This prospectus includes or incorporates by reference forward-looking
statements, including those identified by the words "believes," "anticipates,"
"expects" and similar expressions. We have based these forward-looking
statements on our current expectations and projections about future events.
These forward-looking statements are subject to risks, uncertainties, and
assumptions about Occidental, including, among other things:
 
  .  global commodity pricing fluctuations;
 
  .  competitive pricing pressures;
 
  .  higher than expected costs including feedstocks;
 
  .  the supply and demand considerations for our products;
 
  .  any general economic recession domestically or internationally; and
 
  .  not successfully completing any expansion, capital expenditure,
     acquisition or divestiture.
 
We undertake no obligation to publicly update or revise any forward-looking
statements, whether as a result of new information, future events or otherwise.
In light of these risks, uncertainties and assumptions, the forward-looking
events discussed in this prospectus or in the incorporated documents might not
occur.
 
                                       2
<PAGE>
 
You should rely only on the information contained or incorporated by reference
in this prospectus and the accompanying prospectus supplements. We have not,
and the underwriters have not, authorized any other person to provide you with
different information. If anyone provides you with different or inconsistent
information, you should not rely on it. We are not, and the underwriters are
not, making an offer to sell these securities in any jurisdiction where the
offer or sale is not permitted. You should assume that the information
contained or incorporated by reference in this prospectus supplement and the
accompanying prospectus supplement is accurate as of the date on the front
cover of this prospectus only. Our business, financial condition, results of
operations and prospects may have changed since that date.
 
                             ABOUT THIS PROSPECTUS
 
This prospectus is part of a registration statement Occidental filed with the
Securities and Exchange Commission using a "shelf" registration process. Under
this shelf registration process, Occidental may sell any combination of the
securities described in this prospectus in one of more offerings up to a total
dollar amount of $1,400,000,000. This prospectus provides you with a general
description of the securities Occidental may offer. Each time Occidental sells
securities, Occidental will provide a prospectus supplement that will contain
specific information about the terms of that offering. The prospectus
supplement may also add, update or change information contained in this
prospectus. You should read both this prospectus and any prospectus supplement
together with additional information described under the heading "Where You Can
Find More Information."
 
                                       3
<PAGE>
 
WHERE YOU CAN FIND MORE INFORMATION
 
Occidental files reports, proxy statements, and other information with the
Securities and Exchange Commission ("SEC"). Such reports, proxy statements, and
other information concerning Occidental can be read and copied at the SEC's
Public Reference Room at 450 Fifth Street, N.W., Washington, D.C. 20549. Please
call the SEC at 1-800-SEC-0330 for further information on the Public Reference
Room. The SEC maintains an internet site at http://www.sec.gov that contains
reports, proxy and information statements and other information regarding
issuers that file electronically with the SEC, including Occidental.
Occidental's Common Stock is listed and traded on the New York Stock Exchange
("NYSE"). These reports, proxy statements and other information are also
available for inspection at the offices of the NYSE, 20 Broad Street, New York,
New York 10005.
 
This prospectus is part of a registration statement filed with the SEC by
Occidental and the trusts. The full registration statement can be obtained from
the SEC as indicated above or from Occidental.
 
The SEC allows Occidental to "incorporate by reference" the information it
files with the SEC. This permits Occidental to disclose important information
to you by referencing these filed documents. Any information referenced this
way is considered part of this prospectus, and any information filed with the
SEC subsequent to this prospectus will automatically be deemed to update and
supersede this information. Occidental incorporates by reference the following
documents which have been filed with the SEC:
 
 .  Annual Report on Form 10-K for the year ended December 31, 1997;
 
 .  Quarterly Reports on Form 10-Q for the quarters ended March 31, 1998, June
   30, 1998 and September 30, 1998; and
 
 .  Current Reports on Form 8-K, dated January 26, 1998, January 30, 1998,
   January 31, 1998, February 10, 1998, February 11, 1998, February 12, 1998,
   April 1, 1998, April 20, 1998, May 15, 1998 (2 reports), July 20, 1998,
   September 25, 1998, October 21, 1998 and November 16, 1998.
 
Occidental also incorporates by reference any future filings made with the SEC
pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act of 1934 (the
"Exchange Act") until Occidental or the trusts sell all of the debt securities
and preferred securities.
 
Occidental will provide without charge upon written or oral request, a copy of
any or all of the documents which are incorporated by reference to this
prospectus. Requests should be directed to Occidental Petroleum Corporation,
10889 Wilshire Boulevard, Los Angeles, California 90024, Attn: James R. Havert,
Vice President and Treasurer; telephone: (310) 208-8800.
 
There are no separate financial statements of the trusts in this prospectus.
Occidental does not believe such financial statements would be helpful because:
 
 .  The trusts are direct or indirect wholly-owned subsidiaries of Occidental,
   which files consolidated financial information under the Exchange Act.
 
 .  The trusts do not have any independent operations other than issuing the
   preferred and common securities and purchasing the subordinated debt
   securities.
 
 .  Occidental guarantees the preferred securities of the trusts as described in
   this prospectus.
 
                                       4
<PAGE>
 
You should rely only on the information contained or incorporated by reference
in this prospectus or any prospectus supplement. Occidental has not authorized
any other person to provide you with different information. If anyone provides
you with different or inconsistent information, you should not rely on it.
Occidental is not making an offer of these securities in any jurisdiction where
the offer or sale is not permitted. You should assume that the information
appearing in this prospectus or any prospectus supplement, as well as
information Occidental has previously filed with the SEC and incorporated by
reference, is accurate as of the date on the front of those documents only.
Occidental's business, financial condition, results of operations and prospects
may have changed since that date.
 
OCCIDENTAL
 
Occidental explores for, develops, produces and markets crude oil and natural
gas and manufactures and markets a variety of chlorovinyls (including basic
chemicals and polymers and plastics), specialty chemicals and petrochemicals.
Occidental conducts its principal operations through two subsidiaries,
Occidental Oil and Gas Corporation and Occidental Chemical Corporation, and its
29.5% interest in the Equistar Chemicals, LP petrochemicals partnership.
Occidental's executive offices are located at 10889 Wilshire Boulevard, Los
Angeles, California 90024; telephone (310) 208-8800.
 
THE TRUSTS
 
Occidental created three Delaware business trusts pursuant to three
Declarations of Trust. The trusts are named Oxy Capital Trust I, Oxy Capital
Trust II and Oxy Capital Trust III. Occidental will file an Amended and
Restated Declaration of Trust (a "Declaration") for each trust, which will
state the terms and conditions for each trust to issue and sell its preferred
securities and common securities. A form of Declaration is filed as an exhibit
to the registration statement of which this prospectus forms a part.
 
Each trust will exist solely to:
 
 .  issue and sell its preferred and common securities;
 
 .  use the proceeds from the sale of its preferred and common securities to
   purchase a series of Occidental's subordinated debt securities;
 
 .  maintain its status as a grantor trust for federal income tax purposes; and
 
 .  engage in other activities that are necessary or incidental to these
   purposes.
 
Occidental will purchase all of the common securities of each trust. The common
securities will represent an aggregate liquidation amount equal to at least 3%
of each trust's total capitalization. The preferred securities will represent
the remaining 97% of such trust's total capitalization. The common securities
will have terms substantially identical to, and will rank equal in priority of
payment with, the preferred securities. However, if Occidental defaults on the
related subordinated debt securities, then cash distributions and liquidation,
redemption and other amounts payable on the common securities will be
subordinate to the preferred securities in priority of payment.
 
The preferred securities will be guaranteed by Occidental as described later in
this prospectus.
 
Occidental has appointed five trustees to conduct each trust's business and
affairs:
 
 .  The Bank of New York ("Property Trustee");
 
 
                                       5
<PAGE>
 
 .  The Bank of New York (Delaware) ("Delaware Trustee"); and
 
 .  Three Occidental officers ("Regular Trustees").
 
Only Occidental, as owner of the common securities, can remove or replace the
trustees. In addition, Occidental can increase or decrease the number of
trustees. However, the majority of trustees will always be Regular Trustees.
 
Occidental will pay all fees and expenses related to each trust and each
offering of the related preferred securities and will pay all ongoing costs and
expenses of each trust, except such trust's obligations under the related
preferred and common securities.
 
The trusts will not have separate financial statements. The statements would
not be material to holders of the preferred securities because no trust will
have any independent operations. Each trust exists solely for the reasons
summarized above.
 
USE OF PROCEEDS
 
The net proceeds Occidental receives from the sale of securities offered under
this prospectus will be used for general corporate purposes, including the
retirement of outstanding debt. Each trust will use all proceeds from the sale
of the common and preferred securities to purchase subordinated debt securities
of Occidental. The prospectus supplement with respect to any offering of
securities may identify different or additional uses for the proceeds of such
offering.
 
RATIOS OF EARNINGS TO FIXED CHARGES AND EARNINGS TO COMBINED FIXED CHARGES AND
PREFERRED STOCK DIVIDENDS
 
The following table sets forth Occidental's total enterprise ratios of earnings
to fixed charges and earnings to combined fixed charges and preferred stock
dividends based on the historical results of Occidental and its subsidiaries.
For the purpose of calculating these ratios, earnings consist of income from
continuing operations before income taxes (other than foreign oil and gas
taxes) and fixed charges. Fixed charges include interest and debt expense,
including the proportionate share of interest and debt expense of 50-percent-
owned equity investments and the portion of lease rentals representative of the
interest factor.
<TABLE>
<CAPTION>
                                                                          NINE
                                                                         MONTHS
                                                                          ENDED
                                             YEARS ENDED DECEMBER 31,   SEPT. 30,
                                             -------------------------  ---------
                                             1997 1996 1995 1994  1993  1998 1997
                                             ---- ---- ---- ----  ----  ---- ----
<S>                                          <C>  <C>  <C>  <C>   <C>   <C>  <C>
Ratio of Earnings to Fixed Charges.........  1.55 2.08 1.75  (a)   (a)  2.28 2.45
Ratio of Earnings to Combined Fixed Charges
 and Preferred Stock Dividends.............  1.28 1.53 1.45  (b)   (b)  2.19 1.96
</TABLE>
(a) Earnings were inadequate to cover fixed charges by $298 million in 1994 and
    $224 million in 1993.
 
(b) Earnings were inadequate to cover fixed charges and preferred stock
    dividends by $395 million in 1994 and $272 million in 1993.
 
DESCRIPTION OF SECURITIES
 
This prospectus contains a summary of the senior debt securities, the
subordinated debt securities, the preferred securities, and the preferred
securities guarantee. These summaries are not meant to be a complete
description of each security. However, this prospectus and the accompanying
prospectus supplement contain the material terms and conditions for each
security. For more information please refer to (1) the indenture (the "Senior
Indenture") among Occidental and The Bank of New York, as trustee ("Senior
Indenture Trustee"), relating to issuance of each series of senior debt
securities, (2) the indenture (the "Subordinated Indenture") among Occidental
and The Bank of New York, as trustee (the "Subordinated Indenture Trustee")
relating to issuance of each series of subordinated debt securities, (3) the
Declaration of each trust, and (4) Occidental's guarantee of the preferred
securities issued by each trust (the "Preferred Securities Guarantees"). Forms
of these documents are filed as exhibits to the registration statement,
 
                                       6
<PAGE>
 
which includes this prospectus. Capitalized terms used in this prospectus that
are not defined will have the meanings given them in these documents.
 
DESCRIPTION OF SENIOR DEBT SECURITIES
 
GENERAL
 
Below is a description of certain general terms of the senior debt securities.
The description does not purport to be complete and is subject to and qualified
in its entirety by reference to the Senior Indenture. The particular terms of a
series of senior debt securities will be described in a prospectus supplement.
 
The senior debt securities will rank equally with all of Occidental's senior
and unsubordinated debt. The Senior Indenture does not limit the amount of
senior debt securities which Occidental may issue, nor does it limit Occidental
or its subsidiaries from issuing any other unsecured debt.
 
Occidental will issue the senior debt securities under the Senior Indenture.
The Senior Indenture will be qualified under the Trust Indenture Act of 1939,
as amended (the "Trust Indenture Act"). The Senior Indenture is filed as an
exhibit to the registration statement which includes this prospectus.
 
Each prospectus supplement will describe the following terms relating to a
series of senior debt securities:
 
 .  the title;
 
 .  any limit on the amount that may be issued;
 
 .  whether or not such series of senior debt securities will be issued as
   registered securities, bearer securities or both;
 
 .  the price at which such series of senior debt securities will be issued,
   which may be at a discount;
 
 .  whether or not such series of senior debt securities will be issued in
   global form, the terms and who the depository will be;
 
 .  the maturity date(s);
 
 .  the person to whom any interest will be payable on any registered security,
   if other than the person in whose name such security is registered at the
   close of business on the regular record date;
 
 .  the annual interest rate(s), if any, (which may be fixed or variable) or the
   method for determining the rate(s) and the date(s) interest will begin to
   accrue, the date(s) interest will be payable and the regular record date(s)
   for interest payment date(s) or the method for determining such date(s);
 
 .  the place(s) where payments shall be payable, registered securities may be
   surrendered for registration of transfer, securities may be surrendered for
   exchange, and notices and demands to or upon Occidental may be served;
 
 .  the period(s) within which, and the price(s) at which, such series of senior
   debt securities may, pursuant to any optional or mandatory redemption
   provisions, be redeemed, in whole or in part, and other related terms and
   provisions;
 
 .  any mandatory or optional sinking fund provisions or any provisions for
   remarketing the securities and other related terms and provisions;
 
 .  the denominations in which such series of senior debt securities will be
   issued, if other than denominations of $1,000 in the case of registered
   securities and any integral multiple thereof, and in the case of bearer
   securities, if other than denominations of $5,000 and $100,000;
 
 .  the currency or currencies, including composite currencies or currency
   units, for
 
                                       7
<PAGE>
 
   which such series of senior debt securities may be denominated or in which
   payment of the principal of and interest, if any, on such series of senior
   debt securities shall be payable, if other than the currency of the United
   States of America, and, if so, whether such series of senior debt
   securities may be satisfied and discharged other than as provided in
   Article Four of the Senior Indenture;
 
 .  if the amounts of payments of principal of and interest, if any, on such
   series of senior debt securities are to be determined with reference to an
   index, formula or other method, or based on a coin or currency other than
   that in which such series of senior debt securities are stated to be
   payable, the manner in which such amounts shall be determined and the
   calculation agent, if any, with respect thereto.
 
 .  if other than the principal amount thereof, the portion of the principal
   amount of such series of senior debt securities that will be payable upon
   declaration of acceleration of the maturity thereof pursuant to an event of
   default;
 
 .  if other than as defined in the Senior Indenture, the meaning of "Business
   Day" when used with respect to such series of senior debt securities;
 
 .  if such series of senior debt securities may be issued or delivered
   (whether upon original issuance or upon exchange of a temporary security of
   such series of otherwise), or any installment of principal or interest is
   payable, only upon receipt of certain certificates or other documents or
   satisfaction of other conditions in addition to those specified in the
   Senior Indenture, the forms and terms of such certificates, documents or
   conditions;
 
 .  any addition to, or modification or deletion of, any event of default,
   covenant of Occidental or other term or provision specified in the Senior
   Indenture with respect to such series of senior debt securities; and
 
 .  any other terms (which terms may be inconsistent with the Senior
   Indenture).
 
CONSOLIDATION, MERGER OR SALE
 
The Senior Indenture generally permits Occidental to merge or consolidate, or
sell, convey, transfer or otherwise dispose of its assets as an entirety or
substantially as an entirety, provided that no event of default would occur as
a result of such transaction. However, any successor or acquiror of such
assets must assume all of the obligations of Occidental under the Senior
Indenture and the senior debt securities and be organized and existing under
U.S. laws.
 
LIMITATION ON LIENS
 
Occidental will not, nor will it permit any Consolidated Subsidiary (as
defined below) to, incur, create, assume, guarantee or otherwise become liable
with respect to any Secured Debt (as defined below), unless the Securities are
secured equally and ratably with (or prior to) such Secured Debt. This
covenant will not apply to: (1) Liens (as defined below) existing on the date
of the Senior Indenture; (2) Liens existing on property of, or on any shares
of stock or Indebtedness of, any corporation at the time such corporation
becomes a Consolidated Subsidiary; (3) Liens in favor of Occidental or
 
                                       8
<PAGE>
 
a Consolidated Subsidiary; (4) Liens in favor of governmental bodies to secure
progress, advance or other payments; (5) Liens existing on property, shares of
stock or Indebtedness at the time of acquisition thereof (including acquisition
through merger or consolidation) or Liens to secure the payment of all or any
part of the purchase price thereof or the cost of construction, installation,
renovation, improvement or development thereon or thereof or to secure any
Indebtedness incurred prior to, at the time of, or within 360 days after the
later of the acquisition, completion of such construction, installation,
renovation, improvement or development or the commencement of full operation of
such property or within 360 days after the acquisition of such shares or
Indebtedness for the purpose of financing all or any part of the purchase price
or cost thereof; and (6) any extension, renewal or refunding of any Liens
referred to in the foregoing clauses (1) through (5). Notwithstanding the
foregoing, Occidental and one or more Consolidated Subsidiaries may incur,
create, assume, guarantee or otherwise become liable with respect to Secured
Debt that would otherwise be subject to the foregoing restrictions if, after
giving effect thereto, the aggregate amount of all Secured Debt, together with
the Discounted Rental Value (as defined below) in respect of sale and leaseback
transactions subject to the restrictions discussed in the following paragraph
(excluding sale and leaseback transactions exempted from such restrictions
pursuant to clause (1) or (2) of the last sentence of such paragraph), would
not exceed 10% of consolidated Net Tangible Assets (as defined below) of
Occidental and its Consolidated Subsidiaries.
 
LIMITATIONS ON SALE AND LEASEBACK TRANSACTIONS
 
Occidental will not nor will it permit any Consolidated Subsidiary to sell and
lease back any Principal Domestic Property (as defined below) unless: (1) the
sale has occurred within 360 days after the later of the acquisition,
completion of construction or commencement of full operations of the Principal
Domestic Property; (2) Occidental or such Consolidated Subsidiary could subject
such Principal Domestic Property to a Lien pursuant to the provisions described
above under "Limitation on Liens" in an amount equal to the Discounted Rental
Value with respect to the sale and leaseback transaction without equally and
ratably securing the Securities; or (3) Occidental or such Consolidated
Subsidiary, within 120 days after such sale, applies or causes to be applied to
the retirement of its Funded Debt (as defined below) an amount (subject to
credits for certain voluntary retirements of Funded Debt) not less than the
greater of (a) the net proceeds of the sale of the Principal Domestic Property
leased pursuant to such arrangement or (b) the fair value (as determined in any
manner approved by the Board of Directors of Occidental) of the Principal
Domestic Property so leased. This restriction will not apply to any sale and
leaseback transaction (1) between Occidental and a Consolidated Subsidiary or
between Consolidated Subsidiaries or (2) involving the taking back of a lease
for a period, including renewals, of not more than three years.
 
CERTAIN DEFINITIONS
 
"Consolidated Subsidiary" means any Subsidiary included in the financial
statements of Occidental and its Subsidiaries prepared on a consolidated basis
in accordance with generally accepted accounting principles.
 
 
                                       9
<PAGE>
 
"Discounted Rental Value" means, as to any particular lease under which any
Person is at the time liable and at any date as of which the amount thereof is
to be determined, the total net amount of rent (after deducting the amount of
rent to be received by such Person under noncancelable subleases) required to
be paid by such Person under such lease during the remaining noncancelable term
thereof (including any such period for which such lease has been extended or
may. at the option of the lessor, be extended), discounted from the respective
due dates thereof to such date at a rate per annum of 11 3/4%. The net amount
of rent required to be paid under any such lease for any such period shall be
the aggregate amount of the rent payable by the lessee with respect to such
period, after excluding amounts required to be paid on account of maintenance
and repairs, insurance, taxes, water rates and similar charges. In the case of
any lease which is terminable by the lessee upon the payment of a penalty, such
net amount shall also include the amount of such penalty, but no rent shall be
considered as required to be paid under such lease subsequent to the first date
upon which it may be so terminated. If and to the extent the amount of any rent
during any future period is not definitely determinable under the lease in
question, the amount of such rent shall be estimated in such reasonable manner
as the Board of Directors of Occidental may in good faith determine.
 
"Funded Debt" means all Indebtedness maturing one year or more from the date of
the creation thereof, all Indebtedness directly or indirectly renewable or
extendible, at the option of the debtor, by its terms or by the terms of any
instrument or agreement relating thereto, to a date one year or more from the
date of the creation thereof, and all Indebtedness under a revolving credit or
similar agreement obligating the lender or lenders to extend credit over a
period of one year or more, even though such Indebtedness may also conform to
the definition of Short-Term Borrowing.
 
"Lien" means and includes any mortgage, pledge, lien, security interest,
conditional sale or other title retention agreement or other similar
encumbrance to secure Indebtedness for borrowed money but excluding any
security interest which a lessor may be deemed to have under a lease and any
lien which may be deemed to exist under a Production Payment or under any
subordination arrangement. "Production Payment" means any economic interest in
oil, gas or mineral reserves which (1) entitles the holder thereof to a
specified share of future production from such reserves, free of the costs and
expenses of such production and (2) terminates when a specified quantity of
such share of future production from such reserves has been delivered or a
specified sum has been realized from the sale of such share of future
production from such reserves.
 
"Net Tangible Assets" of any specified Person means the total of all assets
properly appearing on a balance sheet of such Person prepared in accordance
with generally accepted accounting principles, after deducting from such total,
without duplication of deductions, (1) all Current Liabilities of such Person;
(2) that portion of the book amount of all such assets which would be treated
as intangibles under generally accepted accounting principles, including,
without limitation, all such items as goodwill, trademarks, trade names,
brands, copyrights, patents, licenses and rights with respect to the foregoing
and unamortized debt discount and expense; and (3) the amount, if
any, at which any stock of such Person appears on the asset side of such
balance sheet.
 
"Principal Domestic Property" means any (1) developed oil or gas producing
property or (2)
                                       10
<PAGE>
 
processing or manufacturing plant, in each case which as of the date of the
Indenture is or thereafter is owned or leased by Occidental or any Consolidated
Subsidiary and which is located in the continental United States (provided,
however, that any such property or plant declared by the Board of Directors by
Board Resolution not to be of material importance to the business of Occidental
and its Consolidated Subsidiaries taken as a whole will be excluded from the
foregoing definition).
 
"Secured Debt" means any Indebtedness of Occidental or any Consolidated
Subsidiary, secured by a Lien on any Principal Domestic Property or on any
shares of stock or on any Indebtedness of any Consolidated Subsidiary which
owns any Principal Domestic Property.
 
EVENTS OF DEFAULT UNDER THE SENIOR INDENTURE
 
The following are events of default under the Senior Indenture with respect to
any series of senior debt securities issued:
 
 .  failure to pay interest when due and such failure continues for 30 days and
   the time for payment has not been extended or deferred;
 
 .  failure to pay the principal (or premium, if any) when due;
 
 .  failure to observe or perform any other covenant contained in the senior
   debt securities or the Senior Indenture (other than a covenant specifically
   benefitting only another series of senior debt securities), and such failure
   continues for 60 days after Occidental receives notice from the Senior
   Indenture Trustee or holders of at least 25% in aggregate principal amount
   of the outstanding senior debt securities of that series;
 
 .  acceleration of more than $50,000,000 of debt of Occidental, and such debt
   is not discharged or such acceleration is not cancelled within 20 days after
   Occidental receives notice from the Senior Indenture Trustee or holders of
   at least 25% in aggregate principal amount of the outstanding senior debt
   securities of that series;
 
 .  certain events of bankruptcy, insolvency or reorganization of Occidental;
   and
 
 .  any other event of default specified in the prospectus supplement relating
   to such series of senior debt securities.
 
If an event of default with respect to senior debt securities of any series
occurs and is continuing, the Senior Indenture Trustee or the holders of at
least 25% in principal amount of the outstanding senior debt securities of that
series, by notice in writing to Occidental (and to the Senior Indenture Trustee
if notice is given by such holders), may declare the principal of (or if such
senior debt securities are discount securities, the portion of the principal
amount as specified in the applicable prospectus supplement), premium, if any,
and accrued interest, if any, due and payable immediately.
 
The holders of a majority in principal amount of the outstanding senior debt
securities of an affected series may waive any default or event of default with
respect to such series and its consequences, except defaults or events of
default regarding:
 
 .  payment of principal or interest; or
 
 .  covenants that cannot be modified or amended without the consent of each
   holder of any outstanding senior debt securities affected (as described
   under "Modification of Senior Indenture; Waiver" below).
 
 
                                       11
<PAGE>
 
Any such waiver shall cure such default or event of default.
 
Subject to the terms of the Senior Indenture, if an event of default under the
Senior Indenture shall occur and be continuing, the Senior Indenture Trustee
will be under no obligation to exercise any of its rights or powers under the
Senior Indenture at the request or direction of any of the holders of the
applicable series of senior debt securities, unless such holders have offered
the Senior Indenture Trustee reasonable security or indemnity. The holders of a
majority in principal amount of the outstanding senior debt securities of any
series will have the right to direct the time, method and place of conducting
any proceeding for any remedy available to the Senior Indenture Trustee, or
exercising any trust or power conferred on the Senior Indenture Trustee, with
respect to the senior debt securities of that series, provided that:
 
 .  the direction given to the Senior Indenture Trustee is not in conflict with
   any law or the Senior Indenture;
 
 .  the Senior Indenture Trustee may take any other action deemed proper by it
   which is not inconsistent with such direction; and
 
 .  the Senior Indenture Trustee has not determined that the action would be
   unjustly prejudicial to the holders not involved in the proceeding.
 
A holder of the senior debt securities of any series will have the right to
institute a proceeding under the Senior Indenture or to appoint a receiver or
trustee, or to seek other remedies only if:
 
 .  the holder has given written notice to the Senior Indenture Trustee of a
   continuing event of default with respect to that series;
 
 .  the holders of at least 25% in aggregate principal amount of the outstanding
   senior debt securities of that series have made written request to, and such
   holders have offered reasonable indemnity to, the Senior Indenture Trustee
   to institute such proceedings as trustee; and
 
 .  the Senior Indenture Trustee does not institute such proceeding, and does
   not receive from the holders of a majority in aggregate principal amount of
   the outstanding senior debt securities of that series other conflicting
   directions, within 60 days after such notice, request and offer.
 
These limitations do not apply to a suit instituted by a holder of senior debt
securities if Occidental defaults in the payment of the principal, premium, if
any, or interest on, the senior debt securities.
 
Occidental will periodically file statements with the Senior Indenture Trustee
regarding its compliance with certain of the covenants in the Senior Indenture.
 
MODIFICATION OF SENIOR INDENTURE; WAIVER
 
Occidental and the Senior Indenture Trustee may change the Senior Indenture
without the consent of any holders with respect to certain matters, including:
 
 .  evidencing the succession of another person to Occidental and the assumption
   by it of the covenants of Occidental in the Senior Indenture and the
   securities of such series;
 
 .  adding to the covenants, agreements and obligations of Occidental for the
   benefit of the holders of such series of senior debt securities, or to
   surrender any right or power the Senior Indenture confers upon Occidental;
 
 .  evidencing and providing for the acceptance of appointment under the Senior
   Indenture of a successor Senior Indenture Trustee with respect to the
 
 
                                       12
<PAGE>
 
   securities of one or more series and to add to or change any provisions of
   the Senior Indenture as shall be necessary to provide for or facilitate the
   administration of the trusts by more than one Senior Indenture Trustee;
 
 .  fixing any ambiguity or correcting any inconsistency in the Senior
   Indenture; and, provided, that no such action shall adversely affect the
   interests of the holders of such senior debt securities;
 
 .  adding, changing or eliminating any provisions of the Senior Indenture
   (which addition, change or elimination may apply to one or more series of
   senior debt securities), provided that any such addition, change or
   elimination neither (a) applies to any security of any series created prior
   to the execution of such supplemental indenture that is entitled to the
   benefit of such provision nor (b) modifies the rights of holders of any such
   security with respect to such provisions;
 
 .  securing the securities; or
 
 .  changing anything else that does not adversely affect the interests of any
   holder of senior debt securities.
 
In addition, under the Senior Indenture, the rights of holders of a series of
senior debt securities may be changed by Occidental and the Senior Indenture
Trustee with the written consent of the holders of at least a majority in
aggregate principal amount of the outstanding senior debt securities of each
series that is affected. However, the following changes, among other things,
may be made only with the consent of each holder of any outstanding senior debt
securities affected:
 
 .  changing the maturity of such series of senior debt securities;
 
 .  reducing the principal amount of a discount security payable upon
   declaration of acceleration;
 
 .  reducing the principal amount, reducing the rate, of or extending the time
   of payment of interest or reducing any premium payable upon the redemption
   of any such senior debt securities;
 
 .  changing the place or currency of payment of principal or interest, if any,
   on any such senior debt securities;
 
 .  impairing the right to institute suit for the enforcement of any payment on
   or with respect to any such senior debt securities; and
 
 .  modifying any of the foregoing requirements or reducing the percentage of
   senior debt securities, the holders of which are required to consent to any
   amendment or waiver of any covenant or past default.
 
FORM, EXCHANGE, AND TRANSFER
 
The senior debt securities of each series may be issued as registered
securities (with or without coupons), as bearer securities or both. Unless
otherwise specified in the applicable prospectus supplement, registered
securities will be issued in denominations of $1,000 and any integral multiple
thereof and bearer securities will be issued in denominations of $5,000 and
$100,000. Subject to the terms of the Senior Indenture and the limitations
applicable to global securities described in the applicable prospectus
supplement, registered securities will be exchangeable for other registered
securities of the same series, in any authorized denomination and of like tenor
and aggregate principal amount.
 
Subject to the terms of the Senior Indenture and the limitations applicable to
global securities set forth in the applicable prospectus supplement, senior
debt securities issued as registered securities may be presented for exchange
or for registration of transfer (duly endorsed or with the form of transfer
endorsed thereon duly executed) at the office of the Security Registrar or at
the office of any transfer agent designated
 
                                       13
<PAGE>
 
by Occidental for such purpose. Bearer securities will not be issued in
exchange for registered securities. Unless otherwise provided in the senior
debt securities to be transferred or exchanged, no service charge will be made
for any registration of transfer or exchange, but Occidental may require
payment of any taxes or other governmental charges. Occidental has appointed
the Senior Indenture Trustee as Security Registrar. Any transfer agent (in
addition to the Security Registrar) initially designated by Occidental for any
senior debt securities will be named in the applicable prospectus supplement.
Occidental may at any time designate additional transfer agents or rescind the
designation of any transfer agent or approve a change in the office through
which any transfer agent acts, except that Occidental will be required to
maintain a transfer agent in each place of payment for the senior debt
securities of each series.
 
If the senior debt securities of any series are to be redeemed, Occidental will
not be required to:
 
 .  issue, register the transfer of, or exchange any senior debt securities of,
   that series during a period beginning at the opening of business 15 days
   before any selection of any such senior debt securities to be redeemed and
   ending, in the case of registered securities, at the close of business on
   the day of mailing of the relevant notice of redemption and, in the case of
   bearer securities, the first publication date of such notice, or if the
   senior debt securities of such series are also issuable as registered
   securities and there is no publication, at the close of business on the day
   of mailing of such notice;
 
 .  in the case of registered securities, register the transfer of or exchange
   any senior debt securities so selected for redemption, in whole or in part,
   except the unredeemed portion of any such registered security being redeemed
   in part; or
 
 .  in the case of bearer securities, exchange any senior debt securities so
   selected for redemption, except to exchange such bearer security for a
   registered security that is immediately surrendered for redemption.
 
GLOBAL SECURITIES
 
The senior debt securities of each series may be issued in whole or in part in
global form. A senior debt security in global form will be deposited with, or
on behalf of, a depositary, which will be named in an applicable prospectus
supplement. A global security may be issued in either registered or bearer form
and in either temporary or definitive form. A global senior debt security may
not be transferred, except as a whole among the depositary for such senior debt
security and/or its nominees and/or successors. If any senior debt securities
of a series are issuable as global securities, the applicable prospectus
supplement will describe any circumstances when beneficial owners of interest
in any such global security may exchange such interests for definitive senior
debt securities of such series and of like tenor and principal amount in any
authorized form and denomination, the manner of payment of principal of and
interest, if any, on any such global senior debt security and the specific
terms of the depositary arrangement with respect to any such global senior debt
security.
 
DISCHARGE
 
Unless otherwise indicated in an applicable prospectus supplement, Occidental
may terminate at any time its obligations under the Senior Indenture with
respect to any series of senior debt securities by (1)(a) delivering all of the
outstanding securities of that series to the Senior Indenture Trustee to be
cancelled or (b) depositing with the Senior Indenture Trustee
 
 
                                       14
<PAGE>
 
funds or non-callable United States government obligations sufficient to pay
all remaining principal and interest on the series of senior debt securities
and (2) complying with certain other provisions of the Senior Indenture.
 
If Occidental elects to satisfy its obligations by depositing United States
obligations as described above ("discharge"), such election under present law,
is likely to be treated as a redemption of the senior debt securities of that
series prior to maturity in exchange for the property deposited in trust. If
so, each holder would generally recognize, at the time of discharge, gain or
loss for federal income tax purposes measured by the difference between (1) the
sum of (a) the amount of any cash and (b) the fair market value of any property
deposited in trust deemed received by the holder (unless attributable to
accrued interest) and (2) the holder's tax basis in the senior debt securities
deemed surrendered. After the discharge, each holder would be treated as if it
held an undivided interest in the cash (or investments made therewith) and the
property held in trust. Each holder would generally be subject to tax liability
in respect of interest income and original issue discount, if applicable,
thereon and would recognize any gain or loss upon any disposition, including
redemption, of the assets held in trust. Although tax might be owed, the holder
of a discharged senior debt security would not receive cash (except for current
payments of interest on such senior debt security) until the maturity or
earlier redemption of such senior debt security. Such tax treatment could
affect the purchase price that a holder would receive upon the sale of the
senior debt securities.
 
INFORMATION CONCERNING THE SENIOR INDENTURE TRUSTEE
 
The Senior Indenture Trustee, other than during the occurrence and continuance
of an event of default under the Senior Indenture, undertakes to perform only
such duties as are specifically set forth in the Senior Indenture and upon an
event of default under the Senior Indenture, must use the same degree of care
as a prudent person would exercise or use in the conduct of his or her own
affairs. Subject to this provision, the Senior Indenture Trustee is under no
obligation to exercise any of the powers given it by the Senior Indenture at
the request of any holder of senior debt securities unless it is offered
reasonable security and indemnity against the costs, expenses and liabilities
that it might incur. The Senior Indenture Trustee is not required to spend or
risk its own money or otherwise become financially liable while performing its
duties unless it reasonably believes that it will be repaid or receive adequate
indemnity.
 
The Bank of New York is a participating lender under one of Occidental's
revolving credit agreements. The Bank of New York provides commercial banking
services to Occidental and its affiliates and will act as the Subordinated
Indenture Trustee, the Property Trustee and the Preferred Securities Guarantee
Trustee. In addition, an affiliate of The Bank of New York will act as the
Delaware Trustee under each trust. However, if The Bank of New York acquires
any conflicting interest when an event of default is pending, it must (with
certain exceptions) eliminate such conflict or resign.
 
PAYMENT AND PAYMENT AGENTS
 
Unless otherwise indicated in the applicable prospectus supplement, payment of
the interest on any senior debt securities (other than bearer securities) on
any interest payment date will be made to the person in whose name such debt
securities (or one or more predecessor securities) are registered at the close
of business on the regular record date for such interest.
 
                                       15
<PAGE>
 
Principal of and any premium and interest on the senior debt securities (other
than bearer securities) of a particular series will be payable at the office of
the paying agents designated by Occidental, except that, unless otherwise
indicated in the applicable prospectus supplement, interest payments may be
made by wire transfer or by check mailed to the holder. Unless otherwise
indicated in such prospectus supplement, the corporate trust office of the
Senior Indenture Trustee in the City of New York will be designated as sole
paying agent for payments with respect to senior debt securities of each
series. Any other paying agents initially designated by Occidental for the
senior debt securities of a particular series will be named in the applicable
prospectus supplement. Occidental will be required to maintain a paying agent
in each place of payment for the senior debt securities of a particular series.
 
Unless otherwise indicated in an applicable prospectus supplement, interest
shall be computed on the basis of a 360-day year comprised of twelve 30-day
months.
 
Unless otherwise indicated in an applicable prospectus supplement, payment of
principal of and interest, if any, on bearer securities will be made, subject
to any applicable laws and regulations, at the offices of a paying agent
outside the United States designated as Occidental may designate, or by check
mailed to any address or by transfer to an account maintained by the payee
outside the United States. Unless otherwise indicated in an applicable
prospectus supplement, any payment of an installment of interest on any bearer
security will be made only if the coupon relating to the interest installment
is surrendered.
 
All moneys paid by Occidental to a paying agent or the Senior Indenture Trustee
for the payment of the principal of or any premium or interest on any senior
debt security which remain unclaimed at the end of two years after such
principal, premium or interest has become due and payable will be repaid to
Occidental, and the holder of the security thereafter may look only to
Occidental for payment thereof.
 
GOVERNING LAW
 
The Senior Indenture and senior debt securities will be governed by and
construed in accordance with the laws of the State of New York, except to the
extent that the Trust Indenture Act shall be applicable.
 
DESCRIPTION OF SUBORDINATED DEBT SECURITIES
 
GENERAL
 
Occidental may sell one or more series of subordinated debt securities pursuant
to this prospectus, including one series to each trust.
 
Below is a description of certain general terms of the subordinated debt
securities. The particular terms of a series of subordinated debt securities
will be described in a prospectus supplement.
 
Occidental will issue the subordinated debt securities under the Subordinated
Indenture. The Subordinated Indenture will be qualified under the Trust
Indenture Act. The form of Subordinated Indenture is filed as an exhibit to the
registration statement of which this prospectus forms a part.
 
Each series of subordinated debt securities will be unsecured and will be
subordinate and junior in priority of payment to certain of Occidental's other
indebtedness to the extent described in a prospectus supplement, other than to
Occidental's trade creditors. The Subordinated Indenture does not limit the
amount of subordinated debt securities which Occidental
 
 
                                       16
<PAGE>
 
may issue, nor does it limit Occidental or its subsidiaries from issuing any
other secured or unsecured debt.
 
Each prospectus supplement will describe the following terms relating to a
series of subordinated debt securities:
 
 .  the title;
 
 .  any limit on the amount that may be issued;
 
 .  whether or not such series of subordinated debt securities will be issued
   in global form, the terms and who the depository will be;
 
 .  whether or not such series of subordinated debt securities will be issued
   as registered securities, bearer securities or both;
 
 .  the extent to which such series of subordinated debt securities will be
   subordinate and junior to Occidental's other indebtedness;
 
 .  the price at which subordinated debt securities will be issued, which may
   be at a discount;
 
 .  the maturity date(s);
 
 .  the annual interest rate(s), if any, (which may be fixed or variable) or
   the method for determining the rate(s) and the date(s) interest will begin
   to accrue, the date(s) interest will be payable and the regular record
   dates for interest payment date(s) or the method for determining such
   date(s);
 
 .  the place(s) where payments shall be payable;
 
 .  Occidental's right, if any, to defer payment of interest and the maximum
   length of any such deferral period;
 
 .  the date, if any, after which, and the price(s) at which, such series of
   subordinated debt securities may, pursuant to any optional redemption
   provisions, be redeemed, in whole or in part, and other related terms and
   provisions;
 
 .  any mandatory or optional sinking fund provisions and other related terms
   and provisions;
 
 .  the denominations in which such series of subordinated debt securities will
   be issued, if other than denominations of $25 and any integral multiple
   thereof; and
 
 .  the currency or currencies, including composite currencies or currency
   units, for which such series of subordinated debt securities may be
   denominated or in which payment of the principal of and interest, if any,
   on such series of subordinated debt securities shall be payable, if other
   than the currency of the United States of America, and, if so, whether such
   series of senior debt securities may be satisfied and discharged other than
   as provided in Article Four of the Senior Indenture;
 
 .  if the amounts of payments of principal of and interest, if any, on such
   series of subordinated debt securities are to be determined with reference
   to an index, formula or other method, or based on a coin or currency other
   than that in which such series of subordinated debt securities are stated
   to be payable, the manner in which such amounts shall be determined and the
   calculation agent, if any, with respect thereto.
 
 .  if other than the principal amount thereof, the portion of the principal
   amount of such series of subordinated debt securities that will be payable
   upon declaration of acceleration of the maturity thereof pursuant to an
   event of default;
 
 .  if other than as defined in the Subordinated Indenture, the meaning of
   "Business Day"
 
                                      17
<PAGE>
 
   when used with respect to such series of subordinated debt securities;
 
 .  if such series of subordinated debt securities may be issued or delivered
   (whether upon original issuance or upon exchange of a temporary security of
   such series of otherwise), or any installment of principal or interest is
   payable, only upon receipt of certain certificates or other documents or
   satisfaction of other conditions in addition to those specified in the
   Subordinated Indenture, the forms and terms of such certificates, documents
   or conditions;
 
 .  the right, if any, to extend the interest payment periods and the duration
   of the extensions;
 
 .  the terms, if any, pursuant to which any subordinated debt securities will
   be subordinate to any of Occidental's debt;
 
 .  any addition to, or modification or deletion of, any event of default,
   covenant or other term or provision specified in the Subordinated Indenture;
   and
 
 .  any other terms (which terms shall not be inconsistent with the Subordinated
   Indenture).
 
CONSOLIDATION, MERGER OR SALE
 
The Subordinated Indenture generally permits Occidental to merge or
consolidate, or sell, convey, transfer or otherwise dispose of its assets as an
entirety or substantially as an entirety, provided that no event of default
would occur as a result of such transaction. However, any successor or acquiror
of such assets must assume all of the obligations of Occidental under the
Subordinated Indenture and the subordinated debt securities.
 
EVENTS OF DEFAULT UNDER THE SUBORDINATED INDENTURE
 
The following are events of default under the Subordinated Indenture with
respect to any series of subordinated debt securities issued:
 
 .  failure to pay interest when due and such failure continues for 90 days and
   the time for payment has not been extended or deferred;
 
 .  failure to pay the principal (or premium, if any) when due;
 
 .  failure to observe or perform any other covenant contained in the
   subordinated debt securities or the Subordinated Indenture (other than a
   covenant specifically benefitting only another series of subordinated debt
   securities), and such failure continues for 90 days after Occidental
   receives notice from the Subordinated Indenture Trustee or holders of at
   least 25% of aggregate principal amount of the outstanding subordinated debt
   securities of that series;
 
 .  certain events of bankruptcy, insolvency or reorganization of Occidental;
   and
 
 .  if such series of subordinated debt securities are held by a trust, the
   voluntary or involuntary dissolution, winding up or termination of the trust
   that owns the series of subordinated debt securities, except in connection
   with
 
  (1) the distribution of such subordinated debt securities to holders of
  preferred and common securities of such trust;
 
  (2) the redemption of all of the preferred and common securities of such
  trust; or
 
  (3) mergers, consolidations or amalgamations permitted by the Declaration
  of such trust.
 
 
                                       18
<PAGE>
 
If an event of default with respect to subordinated debt securities of any
series occurs and is continuing, the Subordinated Indenture Trustee or the
holders of at least 25% in aggregate principal amount of the outstanding
subordinated debt securities of that series, by notice in writing to Occidental
(and to the Subordinated Indenture Trustee if notice is given by such holders),
may declare the unpaid principal of, premium, if any, and accrued interest, if
any, due and payable immediately.
 
The holders of a majority in aggregate principal amount of the outstanding
subordinated debt securities of an affected series (or if such subordinated
debt securities are held by a trust, the holders of at least a majority in
aggregate liquidation amount of the trust's preferred securities) may waive any
default or event of default with respect to such series and its consequences,
except defaults or events of default regarding:
 
 .  payment of principal, premium, if any, or interest; or
 
 .  certain covenants which require the consent of all holders to amend
   (including, generally, changes to the stated maturity of the subordinated
   debt securities and a reduction in the vote required to amend or waive
   provisions of the Subordinated Indenture).
 
Any such waiver shall cure such default or event of default.
 
If the subordinated debt securities of any series are held by a trust, and a
Declaration Event of Default (as defined under "Description of Preferred
Securities--Declaration Events of Default" below) has occurred and is
attributable to the failure of Occidental to pay principal, premium, if any, or
interest on, such subordinated debt securities, then each holder of the
preferred securities of such trust may sue Occidental, or seek other remedies
to force payment to such holder of the principal of, premium, if any, or
interest on, such subordinated debt securities having a principal amount equal
to the aggregate liquidation amount of the preferred securities held by such
holder.
 
Subject to the terms of the Subordinated Indenture, if an event of default
under the Subordinated Indenture shall occur and be continuing, the
Subordinated Indenture Trustee will be under no obligation to exercise any of
its rights or powers under the Subordinated Indenture at the request or
direction of any of the holders of the applicable series of subordinated debt
securities, unless such holders have offered the Subordinated Indenture Trustee
reasonable security or indemnity. The holders of a majority in principal amount
of the outstanding subordinated debt securities of any series will have the
right to direct the time, method and place of conducting any proceeding for any
remedy available to the Subordinated Indenture Trustee, or exercising any trust
or power conferred on the Subordinated Indenture Trustee, with respect to the
subordinated debt securities of that series, provided that:
 
 .  it is not in conflict with any law or the Subordinated Indenture;
 
 .  the Subordinated Indenture Trustee may take any other action deemed proper
   by it which is not inconsistent with such direction; and
 
 .  the Subordinated Indenture Trustee has not determined that the activity
   would be unduly prejudicial to the holders not involved in the proceeding.
 
A holder of the subordinated debt securities of any series will have the right
to institute a proceeding under the Subordinated Indenture or to appoint a
receiver or trustee, or to seek other remedies only if:
 
 .  the holder has given written notice to the Subordinated Indenture Trustee of
   a
 
 
                                       19
<PAGE>
 
   continuing event of default with respect to that series;
 
 .  the holders of at least 25% in aggregate principal amount of the outstanding
   subordinated debt securities of that series have made written request, and
   such holders have offered reasonable indemnity to the Subordinated Indenture
   Trustee to institute such proceedings as trustee; and
 
 .  the Subordinated Indenture Trustee does not institute such proceeding, and
   does not receive from the holders of a majority in aggregate principal
   amount of the outstanding subordinated debt securities of that series other
   conflicting directions, within 60 days after such notice, request and offer.
 
These limitations do not apply to a suit instituted by a holder of subordinated
debt securities if Occidental defaults in the payment of the principal,
premium, if any, or interest on, the subordinated debt securities.
 
Occidental will periodically file statements with the Subordinated Indenture
Trustee regarding its compliance with certain of the covenants in the
Subordinated Indenture.
 
MODIFICATION OF SUBORDINATED INDENTURE; WAIVER
 
Occidental and the Subordinated Indenture Trustee may change the Subordinated
Indenture without the consent of any holders with respect to certain matters,
including:
 
 
 .  evidencing the succession of another person to Occidental and the assumption
   by it of the covenants of Occidental in the Subordinated Indenture and the
   securities of such series;
 
 .  adding to the covenants, agreements and obligations of Occidental for the
   benefit of the holders of such series of subordinated debt securities, or to
   surrender any right or power the Subordinated Indenture confers upon
   Occidental;
 
 .  evidencing and providing for the acceptance of appointment under the
   Subordinated Indenture of a successor Subordinated Indenture Trustee with
   respect to the securities of one or more series and to add to or change any
   provision of the Subordinated Indenture as shall be necessary to provide for
   or facilitate the administration of the trusts by more than one Subordinated
   Indenture Trustee;
 
 .  curing any ambiguity, defect or inconsistency in the Subordinated Indenture;
   provided, that no such action shall adversely affect the interests of the
   holders of securities;
 
 .  to add, change or eliminate any provision of the Subordinated Indenture
   (which addition, change or elimination may apply to one or more series of
   subordinated debt securities), provided that any such addition, change or
   elimination neither (a) applies to any security of any series created prior
   to the execution of such supplemental indenture that is entitled to the
   benefit of such provision nor (b) modifies the rights of holders of any such
   security with respect to such provisions;
 
 .  to secure the securities; or
 
 .  changing anything else that does not adversely affect the interests of any
   holder of subordinated debt securities of any series.
 
In addition, under the Subordinated Indenture, the rights of holders of a
series of subordinated debt securities may be changed by Occidental and the
Subordinated Indenture Trustee with the written consent of the holders of at
least a
 
                                       20
<PAGE>
 
majority in aggregate principal amount of the outstanding subordinated debt
securities of each series that is affected. However, the following changes,
among other things, may only be made with the consent of each holder of any
outstanding subordinated debt securities affected:
 
 .  changing the fixed maturity of such subordinated debt securities;
 
 .  reducing the principal amount of a discount security payable upon
   declaration of acceleration;
 
 .  reducing the principal amount, reducing the rate of or extending the time of
   payment of interest, or reducing any premium payable upon the redemption of
   any such subordinated debt securities; or
 
 .  modifying any of the foregoing requirements or reducing the percentage of
   subordinated debt securities, the holders of which are required to consent
   to any amendment or waiver of any covenant or past default.
 
If the consent of the Property Trustee of a trust, as the sole holder of
subordinated debt securities held by the trust, is required to consent to any
amendment, modification or termination of the Subordinated Indenture, the
Property Trustee will request directions from the holders of the preferred
securities of the applicable trust.
 
FORM, EXCHANGE, AND TRANSFER
 
The subordinated debt securities of each series may be issued as registered
securities (with or without coupons), as bearer securities or both. Unless
otherwise specified in the applicable prospectus supplement, registered
securities will be issued in denominations of $25 and any integral multiple
thereof.
 
At the option of the holder, subject to the terms of the Subordinated Indenture
and the limitations applicable to global securities described in the applicable
prospectus supplement, subordinated debt securities of any series will be
exchangeable for other subordinated debt securities of the same series, in any
authorized denomination and of like tenor and aggregate principal amount.
 
Subject to the terms of the Subordinated Indenture and the limitations
applicable to global securities set forth in the applicable prospectus
supplement, subordinated debt securities may be presented for exchange or for
registration of transfer (duly endorsed or with the form of transfer endorsed
thereon duly executed if so required by Occidental or the Subordinated
Indenture Trustee) at the office of the Security Registrar or at the office of
any transfer agent designated by Occidental for such purpose. Unless otherwise
provided in the subordinated debt securities to be transferred or exchanged, no
service charge will be made for any registration of transfer or exchange, but
Occidental may require payment of any taxes or other governmental charges.
Occidental has appointed the Subordinated Indenture Trustee as Security
Registrar. Any transfer agent (in addition to the Security Registrar) initially
designated by Occidental for any subordinated debt securities will be named in
the applicable prospectus supplement. Occidental may at any time designate
additional transfer agents or rescind the designation of any transfer agent or
approve a change in the office through which any transfer agent acts, except
that Occidental will be required to maintain a transfer agent in each place of
payment for the subordinated debt securities of each series.
 
If the subordinated debt securities of any series are to be redeemed,
Occidental will not be required to:
 
 .  issue, register the transfer of, or exchange any subordinated debt
   securities of that series during a period beginning at the
 
                                       21
<PAGE>
 
   opening of business 15 business days before any selection of subordinated
   debt securities of such series for redemption and ending at the close of
   business on the day of mailing of the notice of redemption; or
 
 .  register the transfer of or exchange any subordinated debt securities so
   selected for redemption, in whole or in part, except the unredeemed portion
   of any such subordinated debt securities being redeemed in part.
 
GLOBAL SECURITIES
 
The subordinated debt securities of each series may be issued in whole or in
part in global form. A subordinated debt security in global form will be
deposited with, or on behalf of, a depositary, which will be named in an
applicable prospectus supplement. A global security may be issued in temporary
or definitive form. A global subordinated debt security may not be transferred,
except as a whole among the depositary for such subordinated debt securities
and/or its nominees and/or successors. If any subordinated debt securities of a
series are issuable as global securities, the applicable prospectus supplement
will describe any circumstances, when beneficial owners of interests in any
such global security may exchange such interests for definitive subordinated
debt securities of such series and of like tenor and principal amount in any
authorized form and denomination, the manner of payment of principal of and
interest, if any, on any such global subordinated debt security and the
specific terms of the depositary arrangement with respect to any such global
subordinated debt security.
 
DISCHARGE
 
Unless otherwise indicated in an applicable prospectus supplement, Occidental
may terminate at any time its obligations under any series of subordinated debt
securities by (1)(a) delivering all of the outstanding securities of that
series to the trustee to be cancelled or (b) depositing with the trustee funds
or non-callable United State government obligations sufficient to pay all
remaining principal and interest on the series of subordinated debt securities
and (2) complying with certain other provisions of the Subordinated Indenture.
 
If Occidental elects to satisfy its obligations as described above
("discharge"), present law is likely to treat such election as a redemption of
the subordinated debt securities of that series prior to maturity in exchange
for the property deposited in trust. If so, each holder would generally
recognize, at the time of discharge, gain or loss for Federal income tax
purposes measured by the difference between (1) the sum of (a) the amount of
any cash and (b) the fair market value of any property deposited in trust
deemed received by the holder (unless attributable to accrued interest) and (2)
the holder's tax basis in the subordinated debt securities deemed surrendered.
After the discharge, each holder would be treated as if it held an undivided
interest in the cash (or investments made therewith) and the property held in
trust. Each holder would generally be subject to tax liability in respect of
interest income and original issue discount, if applicable, thereon and would
recognize any gain or loss upon any disposition, including redemption, of the
assets held in trust. Although tax might be owed, the holder of a discharged
subordinated note would not receive cash (except for current payments of
interest on such subordinated note) until the maturity or earlier redemption of
such subordinated note. Such tax treatment could affect the purchase price that
a holder would receive upon the sale of the subordinated debt securities.
 
                                       22
<PAGE>
 
INFORMATION CONCERNING THE SUBORDINATED INDENTURE TRUSTEE
 
The Subordinated Indenture Trustee, other than during the occurrence and
continuance of an event of default under the Subordinated Indenture, undertakes
to perform only such duties as are specifically set forth in the Subordinated
Indenture and, upon an event of default under the Subordinated Indenture, must
use the same degree of care as a prudent person would exercise or use in the
conduct of his or her own affairs. Subject to this provision, the Subordinated
Indenture Trustee is under no obligation to exercise any of the powers given it
by the Subordinated Indenture at the request of any holder of subordinated debt
securities unless it is offered reasonable security and indemnity by such
holder against the costs, expenses and liabilities that it might incur. The
Subordinated Indenture Trustee is not required to spend or risk its own money
or otherwise become financially liable while performing its duties unless it
reasonably believes that it will be repaid or receive adequate indemnity.
 
The Bank of New York is a participating lender under one of Occidental's
revolving credit agreements. The Bank of New York provides commercial banking
services to Occidental and its affiliates, is the Senior Indenture Trustee and
will also act as the Subordinated Indenture Trustee, the Property Trustee and
the Preferred Securities Guarantee Trustee. In addition, an affiliate of The
Bank of New York will act as the Delaware Trustee of each of the trusts.
However, if The Bank of New York acquires any conflicting interest when an
event of default is pending, it must (with certain exceptions) eliminate such
conflict or resign.
 
PAYMENT AND PAYING AGENTS
 
Unless otherwise indicated in the applicable prospectus supplement, payment of
the interest on any subordinated debt securities on any interest payment date
will be made to the person in whose name such subordinated debt securities (or
one or more predecessor securities) are registered at the close of business on
the regular record date for such interest.
 
Principal of and any premium and interest on the subordinated debt securities
of a particular series will be payable at the office of the paying agents
designated by Occidental, except that, unless otherwise indicated in the
applicable prospectus supplement, interest payments may be made by check mailed
to the holder. Unless otherwise indicated in such prospectus supplement, the
corporate trust office of the Subordinated Indenture Trustee in The City of New
York will be designated as Occidental's sole paying agent for payments with
respect to subordinated debt securities of each series. Any other paying agents
initially designated by Occidental for the subordinated debt securities of a
particular series will be named in the applicable prospectus supplement.
Occidental will be required to maintain a paying agent in each place of payment
for the subordinated debt securities of a particular series.
 
Unless otherwise indicated in the applicable prospectus supplement, interest
will be computed on the basis of a 360-day year comprised of twelve 30-day
months.
 
All moneys paid by Occidental to a paying agent or the Subordinated Indenture
Trustee for the payment of the principal of or any premium or interest on any
subordinated debt securities which remain unclaimed at the end of two years
after such principal, premium or interest has become due and payable will be
repaid to Occidental, as the case may be, and the holder of the security
thereafter may look only to Occidental for payment thereof.
 
GOVERNING LAW
 
The Subordinated Indenture and subordinated debt securities and will be
governed by and
 
                                       23
<PAGE>
 
construed in accordance with the laws of the State of New York except to the
extent that the Trust Indenture Act shall be applicable.
 
DESCRIPTION OF PREFERRED SECURITIES
 
GENERAL
 
Each Declaration authorizes the Regular Trustees to issue on behalf of each
trust one series of preferred securities which will have the terms described in
a prospectus supplement. The proceeds from the sale of a trust's preferred and
common securities will be used by such trust to purchase a series of
subordinated debt securities issued by Occidental. The subordinated debt
securities will be held in trust by the Property Trustee for the benefit of the
holders of such preferred and common securities.
 
Under each Preferred Securities Guarantee, Occidental will agree to make
payments of distributions and payments on redemption or liquidation with
respect to a trust's preferred securities, but only to the extent such trust
has funds available to make those payments and has not made such payments. See
"Description of the Preferred Securities Guarantees."
 
The assets of a trust available for distribution to the holders of its
preferred securities will be limited to payments from Occidental under the
series of subordinated debt securities held by such trust. If Occidental fails
to make a payment on such subordinated debt securities, such trust will not
have sufficient funds to make related payments, including distributions, on its
preferred securities.
 
Each Preferred Securities Guarantee, when taken together with Occidental's
obligations under the related series of subordinated debt securities, the
Subordinated Indenture and the related Declaration, will provide a full and
unconditional guarantee of amounts due on the preferred securities issued by a
trust.
 
Each Declaration will be qualified as an indenture under the Trust Indenture
Act. Each Property Trustee will act as indenture trustee for the preferred
securities to be issued by the applicable trust, in order to comply with the
provisions of the Trust Indenture Act.
 
Each series of preferred securities will have the terms, including
distributions, redemption, voting, liquidation rights and such other preferred,
deferred or other special rights or such restrictions as described in the
relevant Declaration or made part of such Declaration by the Trust Indenture
Act or the Delaware Business Trust Act. The terms of such preferred securities
will mirror the terms of the subordinated debt securities held by the trust.
 
The prospectus supplement relating to the preferred securities of a trust will
describe the specific terms of such preferred securities, including:
 
 .  the name of such preferred securities;
 
 .  the dollar amount and number of securities issued;
 
 .  any provision relating to deferral of distribution payments;
 
 .  the annual distribution rate(s) (or method of determining such rate(s)), the
   payment date(s) and the record dates used to determine the holders who are
   to receive distributions;
 
 .  the date from which distributions shall be cumulative;
 
 .  the optional redemption provisions, if any, including the prices, time
   periods and other terms and conditions for which such preferred securities
   shall be purchased or redeemed, in whole or in part;
 
 .  the terms and conditions, if any, upon which the applicable series of
   subordinated debt securities may be distributed to holders of such preferred
   securities;
 
                                       24
<PAGE>
 
 .  the voting rights, if any, of holders of such preferred securities;
 
 .  any securities exchange on which such preferred securities will be listed;
 
 .  whether such preferred securities are to be issued in book-entry form and
   represented by one or more global certificates and, if so, the depository
   for such global certificates and the specific terms of the depositary
   arrangements; and
 
 .  any other relevant rights, preferences, privileges, limitations or
   restrictions of such preferred securities.
 
Each prospectus supplement will describe certain United States federal income
tax considerations applicable to the purchase, holding and disposition of the
series of preferred securities covered by such prospectus supplement.
 
LIQUIDATION DISTRIBUTION UPON DISSOLUTION
 
Unless otherwise specified in an applicable prospectus supplement, each
Declaration states that the related trust shall be dissolved:
 
 .  on the expiration of the term of such trust;
 
 .  upon the bankruptcy of Occidental;
 
 .  upon the filing of a certificate of dissolution or its equivalent with
   respect to Occidental;
 
 .  upon the filing of a certificate of cancellation with respect to such trust
   after obtaining the consent of at least a majority in liquidation amount of
   the preferred and common securities of such trust, voting together as a
   single class;
 
 .  90 days after the revocation of the charter of Occidental (but only if the
   charter is not reinstated during that 90-day period);
 
 .  upon the distribution of the related subordinated debt securities directly
   to the holders of the preferred and common securities of such trust;
 
 .  upon the redemption of all of the common and preferred securities of such
   trust; or
 
 .  upon entry of a court order for the dissolution of Occidental, or such
   trust.
 
Unless otherwise specified in an applicable prospectus supplement, in the event
of a dissolution, after the trust pays all amounts owed to creditors, the
holders of the preferred and common securities will be entitled to receive:
 
 .  cash equal to the aggregate liquidation amount of each preferred and common
   security specified in an accompanying prospectus supplement, plus
   accumulated and unpaid distributions to the date of payment; unless
 
 .  subordinated debt securities in an aggregate principal amount equal to the
   aggregate liquidation amount of the preferred and common securities are
   distributed to the holders of the preferred and common securities.
 
If such trust cannot pay the full amount due on its preferred and common
securities because insufficient assets are available for payment, then the
amounts payable by the trust on its preferred and common securities shall be
paid pro rata. However, if an event of default under the related Declaration
has occurred, the total amounts due on such preferred securities will be paid
before any distribution on such common securities.
 
DECLARATION EVENTS OF DEFAULT
 
An event of default under the Subordinated Indenture relating to a series of
subordinated debt securities is an event of default under the Declaration of
the trust that owns these subordinated debt securities (a "Declaration Event of
Default"). See "Description of the subordinated debt securities -- Events of
Default Under the Subordinated Indenture."
 
                                       25
<PAGE>
 
Occidental and the Regular Trustees of a trust must file annually with the
Property Trustee for such trust a certificate stating whether or not they are
in compliance with all the applicable conditions and covenants under the
related Declaration.
 
Upon the occurrence of a Declaration Event of Default, the Property Trustee of
the applicable trust, as the sole holder of the subordinated debt securities
held by such trust, will have the right under the Subordinated Indenture to
declare the principal of, premium, if any, and interest on such subordinated
debt securities to be immediately due and payable.
 
If a Property Trustee fails to enforce its rights under the related Declaration
or the Subordinated Indenture to the fullest extent permitted by law and
subject to the terms of such Declaration and the Subordinated Indenture, any
holder of the preferred securities issued by the related trust may sue
Occidental, or seek other remedies, to enforce the Property Trustee's rights
under the Declaration or the Subordinated Indenture without first instituting a
legal proceeding against such Property Trustee or any other person.
 
If Occidental fails to pay principal, premium, if any, or interest on a series
of subordinated debt securities when payable, then a holder of the related
preferred securities issued by a trust which owns such notes may directly sue
Occidental or seek other remedies, to collect its pro rata share of payments
owed.
 
REMOVAL AND REPLACEMENT OF TRUSTEES
 
Only the holder of a trust's common securities has the right to remove or
replace the trustees of such trust. The resignation or removal of any trustee
and the appointment of a successor trustee shall be effective only on the
acceptance of appointment by the successor trustee in accordance with the
provisions of the Declaration for such trust.
 
MERGERS, CONSOLIDATIONS OR AMALGAMATIONS OF THE TRUSTS
 
A trust may not consolidate, amalgamate, merge with or into, or be replaced by
or convey, transfer or lease its properties and assets substantially as an
entirety to any other corporation or other body ("Merger Event"), except as
described below. A trust may, with the consent of a majority of its Regular
Trustees and without the consent of the holders of its preferred and common
securities, consolidate, amalgamate, merge with or into, or be replaced by
another trust, if:
 
 .  the successor entity either
 
  (1) assumes all of the obligations of the trust relating to its preferred
      and common securities; or
 
  (2) substitutes for such trust's preferred and common securities other
      securities substantially similar to such preferred and common
      securities ("successor securities"), so long as the successor
      securities rank the same as such preferred and common securities for
      distributions and payments upon liquidation, redemption and otherwise;
 
 .  Occidental acknowledges a trustee of such successor entity who has the same
   powers and duties as the Property Trustee of such trust as the holder of the
   particular series of subordinated debt securities;
 
 .  the preferred securities are listed, or any successor securities will be
   listed, upon notice of issuance, on the same national securities exchange or
   other organization that the preferred securities are then listed;
 
 .  the Merger Event does not cause its preferred securities or successor
   securities
 
                                       26
<PAGE>
 
   to be downgraded by any national rating agency;
 
 .  the Merger Event does not adversely affect the rights, preferences and
   privileges of the holders of its preferred and common securities or
   successor securities in any material way (other than with respect to any
   dilution of the holders' interest in the new entity);
 
 .  the successor entity has a purpose identical to that of the trust;
 
 .  prior to the Merger Event, Occidental has received an opinion of counsel
   from a nationally recognized law firm stating that
 
  (1) such Merger Event does not adversely affect the rights of the holders
      of the trust's preferred securities or any successor securities in any
      material way (other than with respect to any dilution of the holders'
      interest in the new entity); and
 
  (2) following the Merger Event, neither the trust nor the successor entity
      will be required to register as an investment company under the
      Investment Company Act of 1940, as amended (the "Investment Company
      Act"); and
 
 .  Occidental guarantees the obligations of the successor entity under the
   successor securities in the same manner as in the applicable Preferred
   Securities Guarantee and the guarantee of the common securities for such
   trust.
 
In addition, unless all of the holders of the preferred and common securities
approve otherwise, a trust shall not consolidate, amalgamate, merge with or
into, or be replaced by any other entity or permit any other entity to
consolidate, amalgamate, merge with or into, or replace it, if such
transaction would cause the trust or the successor entity to be classified
other than as a grantor trust for United States federal income tax purposes.
 
VOTING RIGHTS; AMENDMENT OF DECLARATIONS
 
The holders of preferred securities have no voting rights except as discussed
under "-- Mergers, Consolidations or Amalgamations of the Trust" and
"Description of the Preferred Securities Guarantees--Amendments and
Assignment," and as otherwise required by law and the Declaration for such
trust.
 
A Declaration may be amended if approved by a majority of the Regular Trustees
of the applicable trust. However, if any proposed amendment provides for, or
such Regular Trustees otherwise propose to effect:
 
  (1) any action that would adversely affect the powers, preferences or
      special rights of the trust's preferred and common securities, whether
      by way of amendment to such Declaration or otherwise; or
 
  (2) the dissolution, winding-up or termination of such trust other than
      pursuant to the terms of its Declaration,
 
then the holders of the trust's preferred and common securities as a single
class will be entitled to vote on such amendment or proposal. In that case,
the amendment or proposal will be effective only if approved by at least a
majority in liquidation amount of the preferred and common securities affected
by such amendment or proposal.
 
If any amendment or proposal referred to in clause (1) above would adversely
affect only the preferred securities or the common securities of a trust, then
only the affected class will be entitled to vote on such amendment or proposal
and such amendment or proposal will
 
                                      27
<PAGE>
 
only be effective with the approval of at least a majority in liquidation
amount of such affected class.
 
No amendment may be made to a Declaration if such amendment would:
 
 .  cause the related trust to be characterized as other than a grantor trust
   for United States federal income tax purposes;
 
 .  reduce or otherwise adversely affect the powers of the Property Trustee; or
 
 .  cause the related trust to be deemed to be an "investment company" which is
   required to be registered under the Investment Company Act.
 
The holders of a majority in aggregate liquidation amount of the preferred
securities of each trust have the right to:
 
 .  direct the time, method and place of conducting any proceeding for any
   remedy available to the Property Trustee of the trust; or
 
 .  direct the exercise of any trust or power conferred upon such Property
   Trustee under that trust's Declaration, including the right to direct the
   Property Trustee, as the holder of a series of subordinated debt securities,
   to
 
  (1) exercise the remedies available under the Subordinated Indenture with
      respect to such subordinated debt securities;
 
  (2) waive any event of default under the Subordinated Indenture that is
      waivable; or
 
  (3) cancel an acceleration of the principal of the subordinated debt
      securities.
 
However, if the Subordinated Indenture requires the consent of the holders of
more than a majority in aggregate principal amount of a series of subordinated
debt securities (a "super- majority"), then the Property Trustee for such
series must get approval of the holders of a super-majority in liquidation
amount of such series of preferred securities.
 
In addition, before taking any of the foregoing actions, the Property Trustee
must obtain an opinion of counsel stating that, as a result of such action, the
trust will continue to be classified as a grantor trust for United States
federal income tax purposes.
 
The Property Trustee of a trust will notify all preferred securities holders of
such trust of any notice received from the Subordinated Indenture Trustee with
respect to the subordinated debt securities held by such trust.
 
As described in each Declaration, the Property Trustee may hold a meeting to
have preferred securities holders vote on a change or have them approve the
change by written consent.
 
If a vote of preferred securities holders is taken or a consent is obtained,
any preferred securities that are owned by Occidental or any of its affiliates
will, for purposes of the vote or consent, be treated as if they were not
outstanding. This means
 
 .  Occidental and any of its affiliates will not be able to vote on or consent
   to matters requiring the vote or consent of holders of preferred securities;
   and
 
 .  any preferred securities owned by Occidental or any of its affiliates will
   not be counted in determining whether the required percentage of votes or
   consents has been obtained.
 
INFORMATION CONCERNING THE PROPERTY TRUSTEES
 
For matters relating to compliance with the Trust Indenture Act, the Property
Trustee of
 
                                       28
<PAGE>
 
each trust will have all of the duties and responsibilities of an indenture
trustee under the Trust Indenture Act. Each Property Trustee, other than during
the occurrence and continuance of a Declaration Event of Default under the
applicable trust, undertakes to perform only such duties as are specifically
set forth in the applicable Declaration and, upon a Declaration Event of
Default, must use the same degree of care and skill as a prudent person would
exercise or use in the conduct of his or her own affairs. Subject to this
provision, a Property Trustee is under no obligation to exercise any of the
powers given it by the applicable Declaration at the request of any holder of
preferred securities unless it is offered reasonable security or indemnity
against the costs, expenses and liabilities that it might incur. However, the
holders of the preferred securities will not be required to offer such an
indemnity where the holders, by exercising their voting rights, direct the
Property Trustee to take any action following a Declaration Event of Default.
 
The Bank of New York is a participating lender under one of Occidental's
revolving credit agreements. The Bank of New York provides commercial banking
services to Occidental and its affiliates, is the Senior Indenture Trustee and
will act as the Subordinated Indenture Trustee, the Property Trustee and the
Preferred Securities Guarantee Trustee. In addition, an affiliate of The Bank
of New York will act as the Delaware Trustee of each of the trusts. However, if
The Bank of New York acquires any conflicting interest when an event of default
is pending, it must (with certain exceptions) eliminate such conflict or
resign.
 
MISCELLANEOUS
 
The Regular Trustees of each trust are authorized and directed to conduct the
affairs of and to operate such trust in such a way that
 
 .  it will not be deemed to be an "investment company" required to be
   registered under the Investment Company Act;
 
 .  it will be classified as a grantor trust for United States federal income
   tax purposes; and
 
 .  the subordinated debt securities held by it will be treated as indebtedness
   of Occidental for United States federal income tax purposes.
 
Occidental and the Regular Trustees of a trust are authorized to take any
action (so long as it is consistent with applicable law or the applicable
certificate of trust or Declaration) that Occidental and the Regular Trustees
of such trust determine to be necessary or desirable for such purposes.
 
Holders of preferred securities have no preemptive or similar rights.
 
A trust may not borrow money, issue debt, execute mortgages or pledge any of
its assets.
 
GOVERNING LAW
 
Each Declaration and the related preferred securities will be governed by and
construed in accordance with the laws of the State of Delaware.
 
DESCRIPTION OF PREFERRED SECURITIES GUARANTEES
 
GENERAL
 
Occidental will execute a Preferred Securities Guarantee, which benefits the
holders of preferred securities, at the time that a trust issues those
preferred securities. Each Preferred Securities Guarantee will be qualified as
an indenture under the Trust Indenture Act. The Bank of New York will act as
indenture trustee ("Preferred Guarantee Trustee") under each Preferred
Securities Guarantee for the purposes of compliance with the Trust Indenture
Act.
 
                                       29
<PAGE>
 
The Preferred Guarantee Trustee will hold each Preferred Securities Guarantee
for the benefit of the preferred securities holders of the applicable trust.
 
Occidental will irrevocably agree, as described in each Preferred Securities
Guarantee, to pay in full, to the holders of the preferred securities issued
by the applicable trust, the Preferred Securities Guarantee Payments (as
defined below) (except to the extent previously paid), when and as due,
regardless of any defense, right of set-off or counterclaim which such trust
may have or assert. The following payments, to the extent not paid by a trust
("Preferred Securities Guarantee Payments"), will be covered by the applicable
Preferred Securities Guarantee:
 
 .  any accrued and unpaid distributions required to be paid on the applicable
   preferred securities, to the extent that the trust has funds available to
   make the payment;
 
 .  the redemption price, to the extent that the trust has funds available to
   make the payment; and
 
 .  upon a voluntary or involuntary dissolution and liquidation of the trust
   (other than in connection with a distribution of subordinated debt
   securities to holders of such preferred securities or the redemption of all
   such preferred securities), the lesser of:
 
  (1) the aggregate of the liquidation amount specified in the prospectus
      supplement for each preferred security plus all accrued and unpaid
      distributions on the preferred security to the date of payment, to the
      extent the trust has funds available to make the payment; and
 
  (2) the amount of assets of the trust remaining available for distribution
      to holders of its preferred securities upon a dissolution and
      liquidation of the trust ("Liquidation Payment").
 
Occidental's obligation to make a Preferred Securities Guarantee Payment may
be satisfied by directly paying the required amounts to the holders of the
preferred securities or by causing the trust to pay the amounts to the
holders.
 
No single document executed by Occidental relating to the issuance of
preferred securities will provide for its full, irrevocable and unconditional
guarantee of the preferred securities. It is only the combined operation of
Occidental's obligations under the Subordinated Indenture, the subordinated
debt securities and the applicable Preferred Securities Guarantee and
Declaration that has the effect of providing a full, irrevocable and
unconditional guarantee of a trust's obligations under its preferred
securities.
 
STATUS OF THE PREFERRED SECURITIES GUARANTEES
 
Each Preferred Securities Guarantee will constitute an unsecured obligation of
Occidental and will rank:
 
 .  subordinate and junior in right of payment to all of Occidental's other
   liabilities (except any guarantee now or hereafter issued by Occidental in
   respect of any preferred or preference stock of any of its affiliates);
 
 .  equal with any guarantee now or hereafter issued by Occidental in respect
   of the most senior preferred or preference stock now or hereafter issued by
   Occidental, and with any guarantee now or hereafter issued by it in respect
   of any preferred or preference stock of any of its affiliates; and
 
 .  senior to Occidental's common stock.
 
Each Declaration will require that the holder of preferred securities accept
the subordination provisions and other terms of the Preferred
                                      30
<PAGE>
 
Securities Guarantee. Each Preferred Securities Guarantee will constitute a
guarantee of payment and not of collection (in other words the holder of the
guaranteed security may sue Occidental, or seek other remedies, to enforce its
rights under the Preferred Securities Guarantee without first suing any other
person or entity). A Preferred Securities Guarantee will not be discharged
except by payment of the Preferred Securities Guarantee Payments in full to the
extent not previously paid or upon distribution to the applicable preferred
securities holders of the corresponding series of subordinated debt securities
pursuant to the appropriate Declaration.
 
AMENDMENTS AND ASSIGNMENT
 
Except with respect to any changes which do not adversely affect the rights of
holders of a series of preferred securities in any material respect (in which
case no consent of such holders will be required), a Preferred Securities
Guarantee may be amended only with the prior approval of the holders of at
least a majority in aggregate liquidation amount of such preferred securities
(excluding any such preferred securities held by Occidental or any of its
affiliates). A description of the way to obtain any approval is described under
"Description of the Preferred Securities--Voting Rights; Amendment of
Declarations." All guarantees and agreements contained in a Preferred
Securities Guarantee will be binding on Occidental's successors, assigns,
receivers, trustees and representatives and are for the benefit of the holders
of the applicable preferred securities.
 
PREFERRED SECURITIES GUARANTEE EVENTS OF DEFAULT
 
An event of default under a Preferred Securities Guarantee occurs if Occidental
fails to make any of its required payments or perform its obligations under
such Preferred Securities Guarantee.
 
The holders of at least a majority in aggregate liquidation amount of the
preferred securities relating to each Preferred Securities Guarantee (excluding
any preferred securities held by Occidental or any of its affiliates) will have
the right to direct the time, method and place of conducting any proceeding for
any remedy available to the Preferred Guarantee Trustee relating to such
Preferred Securities Guarantee or to direct the exercise of any trust or power
given to the Preferred Guarantee Trustee under such Preferred Securities
Guarantee.
 
INFORMATION CONCERNING THE PREFERRED GUARANTEE TRUSTEES
 
The Preferred Guarantee Trustee under a Preferred Securities Guarantee, other
than during the occurrence and continuance of a default under such Preferred
Securities Guarantee, will perform only the duties that are specifically
described in such Preferred Securities Guarantee. After such a default, the
Preferred Guarantee Trustee will exercise the same degree of care and skill as
a prudent person would exercise or use in the conduct of his or her own
affairs. Subject to this provision, a Preferred Guarantee Trustee is under no
obligation to exercise any of its powers as described in the applicable
Preferred Securities Guarantee at the request of any holder of covered
preferred securities unless it is offered reasonable indemnity against the
costs, expenses and liabilities that it might incur.
 
TERMINATION OF THE PREFERRED SECURITIES GUARANTEES
 
Each Preferred Securities Guarantee will terminate once the applicable
preferred securities are paid in full or upon distribution of the corresponding
series of subordinated debt securities to the holders of such preferred
                                       31
<PAGE>
 
securities. Each Preferred Securities Guarantee will continue to be effective
or will be reinstated if at any time any holder of preferred securities issued
by the applicable trust must restore payment of any sums paid under such
preferred securities or such Preferred Securities Guarantee.
 
GOVERNING LAW
 
The Preferred Securities Guarantees will be governed by and construed in
accordance with the laws of the State of New York.
 
RELATIONSHIP AMONG PREFERRED SECURITIES, PREFERRED SECURITIES GUARANTEES AND
SUBORDINATED DEBT SECURITIES HELD BY EACH TRUST
 
Payments of distributions and redemption and liquidation payments due on each
series of preferred securities (to the extent the applicable trust has funds
available for the payments) will be guaranteed by Occidental to the extent
described under "Description of the Preferred Securities Guarantees." No single
document executed by Occidental in connection with the issuance of any series
of preferred securities will provide for its full, irrevocable and
unconditional guarantee of such preferred securities. It is only the combined
operation of Occidental's obligations under the applicable Preferred Securities
Guarantee, Declaration, Subordinated Indenture and subordinated debt securities
that has the effect of providing a full, irrevocable and unconditional
guarantee of a trust's obligations under its preferred securities.
 
As long as Occidental makes payments of interest and other payments when due on
the subordinated debt securities held by a trust, such payments will be
sufficient to cover the payment of distributions and redemption and liquidation
payments due on the preferred securities issued by that trust, primarily
because:
 
 .  the aggregate principal amount of the subordinated debt securities will be
   equal to the sum of the aggregate liquidation amount of the preferred and
   common securities;
 
 .  the interest rate and interest and other payment dates on the subordinated
   debt securities will match the distribution rate and distribution and other
   payment dates for the preferred securities;
 
 .  Occidental shall pay for any and all costs, expenses and liabilities of each
   trust except such trust's obligations under its preferred securities (and
   Occidental has agreed to guarantee such payment); and
 
 .  each Declaration provides that the related trust will not engage in any
   activity that is not consistent with the limited purposes of the trust.
 
If and to the extent that Occidental does not make payments on such
subordinated debt securities, such trust will not have funds available to make
payments of distributions or other amounts due on its preferred securities. In
those circumstances, you will not be able to rely upon the Preferred Securities
Guarantee for payment of these amounts. Instead, you may directly sue
Occidental or seek other remedies to collect your pro rata share of payments
owed. If you sue Occidental to collect payment, then Occidental will assume
your rights as a holder of preferred securities under such trust's Declaration
to the extent Occidental makes a payment to you in any such legal action.
 
A holder of any preferred security may sue Occidental, or seek other remedies,
to enforce its rights under the applicable Preferred Securities Guarantee
without first suing the applicable Preferred Guarantee Trustee, the trust which
issued the preferred security or any other person or entity.
 
                                       32
<PAGE>
 
PLAN OF DISTRIBUTION
 
Occidental may sell the senior debt securities or subordinated debt securities
and a trust may sell its preferred securities being offered hereby in one or
more of the following ways from time to time:
 
 .  to underwriters for resale to the public or to institutional investors;
 
 .  directly to institutional investors;
 
 .  directly to agents;
 
 .  through agents to the public or to institutional investors; or
 
 .  if indicated in the prospectus supplement, pursuant to delayed delivery
   contracts or by remarketing firms.
 
The prospectus supplements will set forth the terms of the offering of each
series of securities, including the name or names of any underwriters or
agents, the purchase price of such securities and the proceeds to Occidental or
the applicable trust, as the case may be, from such sale, any underwriting
discounts or agency fees and other items constituting underwriters' or agents'
compensation, any initial public offering price, any discounts or concessions
allowed or reallowed or paid to dealers and any securities exchanges on which
such securities may be listed.
 
If underwriters are used in the sale, the securities will be acquired by the
underwriters for their own account and may be resold from time to time in one
or more transactions, including negotiated transactions, at a fixed public
offering price or prices, which may be changed, or at market or varying prices
determined at the time of sale.
 
Unless otherwise set forth in a prospectus supplement, the obligations of the
underwriters to purchase any series of securities will be subject to certain
conditions precedent and the underwriters will be obligated to purchase all of
such series of securities, if any are purchased.
 
If a dealer is utilized in the sale of securities, Occidental will sell such
securities to the dealer, as principal. The dealer may then resell the
securities to the public at varying prices to be determined by the dealer at
the time of resale.
 
Securities may also be offered and sold, if so indicated in the prospectus
supplement, in connection with a remarketing upon their purchase, in accordance
with a redemption or repayment pursuant to their terms, or otherwise, by one or
more firms ("remarketing firms") acting as principals for their own accounts or
as agents for Occidental. Any remarketing firm will be identified and the terms
of its agreement, if any, with Occidental and its compensation will be
described in the prospectus supplement.
 
Underwriters, agents, dealers and remarketing firms may be entitled under
agreements entered into with Occidental and/or a trust to indemnification by
Occidental and/or such trust against certain civil liabilities, including
liabilities under the Securities Act of 1933, or to contribution with respect
to payments which the underwriters or agents may be required to make in respect
thereof. Underwriters, agents, dealers and remarketing firms may be customers
of, engage in transactions with, or perform services for Occidental and its
affiliates in the ordinary course of business.
 
Each series of securities will be a new issue of securities and will have no
established trading market. Any underwriters to whom securities are sold by
Occidental or by the trusts for public offering and sale may make a market in
the securities, but such underwriters will not be obligated to do so and may
discontinue any market making at any time without notice. The securities may or
may not be listed on a national securities exchange or a foreign securities
exchange.
 
                                       33
<PAGE>
 
LEGAL OPINIONS
 
The validity of the senior debt securities, the subordinated debt securities,
the Preferred Securities Guarantees and certain matters relating thereto will
be passed on for Occidental by Robert E. Sawyer, Esq., Associate General
Counsel of Occidental, and for any underwriters by Brown & Wood LLP, Los
Angeles, California. Mr. Sawyer beneficially owns, and has rights to acquire
under employee stock options, an aggregate of less than 1% of the outstanding
common stock of Occidental.
 
EXPERTS
 
The consolidated financial statements and financial statement schedule of
Occidental and its subsidiaries, for the fiscal year ended December 31, 1997,
included or incorporated by reference in Occidental's Annual Report on Form 10-
K for the fiscal year ended December 31, 1997, which are incorporated by
reference in this Prospectus, have been audited by Arthur Andersen LLP,
independent public accountants, as indicated in their reports with respect
thereto, and are incorporated by reference herein in reliance upon the
authority of said film as experts in accounting and auditing in giving said
reports.
 
The statements of financial position of the U.S. Department of Energy Naval
Petroleum Reserve No. 1 (NPR-1) as of September 30, 1997 and 1996, and the
related statements of operations and changes in net position, and cash flows
for the year then ended, which appears in Occidental's Current Report on Form
8-K dated February 10, 1998 (date of earliest event reported) have been
incorporated by reference herein and in the registration statement in reliance
upon the report dated November 14, 1997 of KPMG Peat Marwick LLP, independent
auditors, incorporated by reference herein, and upon the authority of said firm
as experts in accounting and auditing.
 
The financial statements of the Lyondell Contributed Business and Equistar
Chemicals, LP which appear in Occidental's Current Report of Form 8-K dated May
15, 1998 have been incorporated by reference herein and in the registration
statement in reliance on the report dated July 7, 1998 and the report dated
February 16, 1998 of PricewaterhouseCoopers LLP, independent accountants,
incorporated by reference herein, and upon the authority of said firm as
experts in accounting and auditing.
 
The statements of income and cash flows of the Millennium Contributed Business
which appear in Occidental's Current Report on Form 8-K dated May 15, 1998 have
been incorporated by reference herein and in the registration statement in
reliance on the report dated July 9, 1998 of PricewaterhouseCoopers LLP,
independent accountants, incorporated by reference herein, and upon the
authority of said firm as experts in accounting and auditing.
 
                                       34
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
  The following table sets forth the expenses to be borne by Occidental in
connection with the offerings described in this Registration Statement.
 
<TABLE>
   <S>                                                                <C>
   SEC filing fee....................................................  $389,200
   Printing fees and expenses........................................    25,000
   Accounting fees and expenses......................................    35,000
   Rating agency fees................................................   402,750
   Legal fees and expenses...........................................    50,000
   Trustee fees and expenses.........................................    10,500
   Blue sky fees and expenses........................................    10,000
   Miscellaneous.....................................................     2,550
                                                                      ---------
     Total........................................................... $ 925,000
                                                                      =========
</TABLE>
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  Section 145 of the Delaware General Corporation Law (DGCL) permits the Board
of Directors of Occidental to indemnify any person against expenses (including
attorneys' fees), judgments, fines and amount paid in settlement actually and
reasonably incurred by him or her in connection with any threatened, pending
or completed action, suit or proceeding in which such person is made a party
by reason of his or her being or having been a director, officer, employee or
agent of Occidental, as the case may be, in terms sufficiently broad to permit
such indemnification under certain circumstances for liabilities (including
reimbursement for expenses incurred) arising under the Securities Act of 1933,
as amended (the Securities Act). The statute provides that indemnification
pursuant to its provisions is not exclusive of other rights of indemnification
to which a person may be entitled under any bylaw, agreement, vote of
stockholders or disinterested directors, or otherwise.
 
  Occidental's Restated Certificate of Incorporation, as amended, provides for
the indemnification of its directors and officers to the fullest extent
permitted by the DGCL. Occidental has also entered into indemnification
agreements with each director and certain officers providing for additional
indemnification. Additionally, Article VIII of Occidental's By-laws provides
that Occidental shall indemnify directors and officers under certain
circumstances for liabilities and expenses incurred by reason of their
activities in such capacities. In addition, Occidental has insurance policies
that provide liability coverage to directors and officers while acting in such
capacities.
 
  The Declaration of Trust of each trust provides that no Regular Trustee,
affiliate of any Regular Trustee, or any officers, directors, shareholders,
members, partners, employees, representatives or agents of any Regular
Trustee, or any employee or agent of such trust or its affiliates (each an
Indemnified Person) shall be liable, responsible or accountable in damages or
otherwise to such trust or any employee or agent of the trust or its
affiliates for any loss, damage or claim incurred by reason of any act or
omission performed or omitted by such Indemnified Person in good faith on
behalf of such trust and in a manner such Indemnified Person reasonably
believed to be within the scope of the authority conferred on such Indemnified
Person by such Declaration or by law, except that an Indemnified Person shall
be liable for any such loss, damage or claim incurred by reason of such
Indemnified Person's gross negligence or willful misconduct with respect to
such acts or omissions.
 
  The Declaration of Trust of each trust also provides that to the fullest
extent permitted by applicable law, Occidental shall indemnify and hold
harmless each Indemnified Person from and against any loss, damage or claim
incurred by such Indemnified Person by reason of any act or omission performed
or omitted by such
 
                                     II-1
<PAGE>
 
Indemnified Person in good faith on behalf of such trust and in a manner such
Indemnified Person reasonably believed to be within the scope of authority
conferred on such Indemnified Person by such Declaration, except that no
Indemnified Person shall be entitled to be indemnified in respect of any loss,
damage or claim incurred by such Indemnified Person by reason of gross
negligence or willful misconduct with respect to such act or omissions. The
Declaration of each trust further provides that, to the fullest extent
permitted by applicable law, expenses (including legal fees) incurred by an
Indemnified Person in defending any claim, demand, action, suit or proceeding
shall, from time to time, be advanced by Occidental prior to the final
disposition of such claim, demand, action, suit or proceeding upon receipt by
of an undertaking by or on behalf of the Indemnified Person to repay such
amount if it shall be determined that the Indemnified Person is not entitled
to be indemnified for the underlying cause of action as authorized by such
Declaration.
 
  The directors and officers of Occidental and the Regular Trustees of each
trust are covered by insurance policies indemnifying against certain
liabilities, including certain liabilities arising under the Securities Act.
which might be incurred by them in such capacities.
 
                                     II-2
<PAGE>
 
ITEM 16. EXHIBITS.
 
<TABLE>
 <C>  <S>
  1.1 Form of Underwriting Agreement (Preferred Securities).**
  1.2 Form of Underwriting Agreement (Debt Securities) (incorporated by reference
       from Exhibit 1.1 to Occidental's Registration Statement on Form S-3 (File No.
       333-52053) filed with the Commission on May 7, 1998).
  3.1 Certificate of Trust of Oxy Capital Trust I.
  3.2 Certificate of Trust of Oxy Capital Trust II.
  3.3 Certificate of Trust of Oxy Capital Trust III.
  4.1 Declaration of Trust of Oxy Capital Trust I.*
  4.2 Declaration of Trust of Oxy Capital Trust II.*
  4.3 Declaration of Trust of Oxy Capital Trust III.*
  4.4 Form of Amended and Restated Declaration of Trust for each of Oxy Capital Trust
       I, Oxy Capital Trust II and Oxy Capital Trust III.*
  4.5 Indenture (Senior Debt Securities), dated as of April 1, 1998, between
       Occidental and The Bank of New York, as Trustee (incorporated by reference
       from Exhibit 4 to Occidental's Registration Statement on Form S-3 (File No.
       333-52053), filed with the Commission on May 7, 1998).
  4.6 Form of Indenture (Subordinated Debt Securities).*
  4.7 Form of Preferred Security (included in Exhibit 4.4).*
  4.8 Form of Subordinated Note (included in Exhibit 4.6).*
  4.9 Form of Preferred Securities Guarantee.*
  5.1 Opinion of Robert E. Sawyer, Esq.*
 12.1 Statement regarding the computation of total enterprise ratios of earnings to
       fixed charges and earnings to combined fixed charges and preferred stock
       dividends.
 23.1 Consent of Robert E. Sawyer, Esq. (included in Exhibit 5.1).*
 23.2 Consent of Independent Public Accountants (Arthur Andersen LLP).
 23.3 Consent of Independent Public Accountants (KPMG Peat Marwick LLP).
 23.4 Consent of Independent Public Accountants (PricewaterhouseCoopers LLP).
 23.5 Consent of Independent Public Accountants (Pricewaterhouse Coopers LLP).
 24.1 Powers of Attorney (included on pages II-5, 7, 8 and 9 ).
 25.1 Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as
       amended, of The Bank of New York, as Trustee under the Indenture (Senior Debt
       Securities).*
 25.2 Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as
       amended, of The Bank of New York, as Trustee under the Indenture (Subordinated
       Debt Securities).*
 25.3 Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as
       amended, of The Bank of New York, as Property Trustee--Oxy Capital Trust I.*
 25.4 Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as
       amended, of The Bank of New York, as Property Trustee--Oxy Capital Trust II.*
 25.5 Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as
       amended, of The Bank of New York, as Property Trustee--Oxy Capital Trust III.*
</TABLE>
- --------
 * To be filed by amendment
** To be filed by amendment or as an exhibit to a document to be incorporated
   or deemed to be incorporated by reference in the Registration Statement.
 
                                      II-3
<PAGE>
 
ITEM 17. UNDERTAKINGS.
 
(a) The undersigned registrant hereby undertakes:
 
    (1) To file, during any period in which offers or sales are being made, a
  post-effective amendment to this registration statement to include any
  material information with respect to the plan of distribution not
  previously disclosed in the registration statement or any material change
  to such information in the registration statement.
 
    (2) That, for the purpose of determining any liability under the
  Securities Act of 1933, each such post-effective amendment shall be deemed
  to be a new registration statement relating to the securities offered
  therein, and the offering of such securities at that time shall be deemed
  to be the initial bona fide offering thereof.
 
    (3) To remove from registration by means of a post-effective amendment
  any of the securities being registered which remain unsold at the
  termination of the offering.
 
  (b) The undersigned registrant hereby undertakes that, for the purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.
 
  (c) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the Act
and will be governed by the final adjudication of such issue.
 
  (d) Oxy Capital Trust I, Oxy Capital Trust II and Oxy Capital Trust III each
hereby undertakes to provide to the underwriter at the closing specified in
the underwriting agreements, certificates in such denominations and registered
in such names as required by the underwriter to permit prompt delivery to each
purchaser.
 
                                     II-4
<PAGE>
 
                               POWER OF ATTORNEY
 
  Each person whose signature appears below constitutes and appoints Donald P.
de Brier, John W. Alden, Robert E. Sawyer and Scott A. King his or her true
and lawful attorneys-in-fact and agents, each acting alone, with full powers
of substitution and resubstitution, for him or her and in his or her name,
place and stead, in any and all capacities, to sign any or all Amendments
(including Post-Effective Amendments) to this Registration Statement and/or to
sign any related Registration Statement filed pursuant to Rule 462(b) of the
Securities Act of 1933, as amended, and in each case to file the same, with
all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, each acting alone, with full power and authority to do and perform
each and every act and thing requisite and necessary to be done in and about
the premises, as fully to all intents and purposes as he or she might or could
do in person, hereby ratifying and confirming all that said attorneys-in-fact
and agents, each acting alone, or his or her substitute or substitutes, may
lawfully do or cause to be done by virtue hereof.
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act, Occidental Petroleum
Corporation certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-3 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Los Angeles, State of California, on
December 18, 1998.
 
                                          OCCIDENTAL PETROLEUM CORPORATION
 
                                                      /s/ Ray R. Irani
                                          By: _________________________________
                                                        Ray R. Irani
                                                  Chairman of the Board of
                                                        Directors and
                                                  Chief Executive Officer
 
  Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on
the dates indicated.
 
<TABLE>
<CAPTION>
             SIGNATURE                          TITLE                  DATE
             ---------                          -----                  ----
 
<S>                                  <C>                         <C>
          /s/ Ray R. Irani           Chairman of the Board of    December 18, 1998
____________________________________  Directors and Chief
            Ray R. Irani              Executive Officer
 
        /s/ Anthony R. Leach         Executive Vice President    December 18, 1998
____________________________________  and Chief Financial
          Anthony R. Leach            Officer
 
    /s/ Samuel P. Dominick, Jr.      Vice President and          December 18, 1998
____________________________________  Controller (Chief
      Samuel P. Dominick, Jr.         Accounting Officer)
 
        /s/ George O. Nolley         Director                    December 18, 1998
____________________________________
          George O. Nolley
 
        /s/ Rosemary Tomich          Director                    December 18, 1998
____________________________________
          Rosemary Tomich
 
</TABLE>
 
                                     II-5
<PAGE>
 
<TABLE>
<CAPTION>
             SIGNATURE                TITLE         DATE
             ---------                -----         ----
 
<S>                                  <C>      <C>
         /s/ J. Roger Hirl           Director December 18, 1998
____________________________________
           J. Roger Hirl
 
         /s/ John W. Kluge           Director December 18, 1998
____________________________________
           John W. Kluge
 
        /s/ Rudolfo Segovia          Director December 18, 1998
____________________________________
          Rudolfo Segovia
 
      /s/ Edward P. Djerejian        Director December 18, 1998
____________________________________
        Edward P. Djerejian
 
        /s/ Dale R. Laurance         Director December 18, 1998
____________________________________
          Dale R. Laurance
 
        /s/ Irvin W. Maloney         Director December 18, 1998
____________________________________
          Irvin W. Maloney
 
          /s/ Aziz Syriani           Director December 18, 1998
____________________________________
            Aziz Syriani
 
         /s/ John E. Feick           Director December 18, 1998
____________________________________
           John E. Feick
 
        /s/ John S. Chalsty          Director December 18, 1998
____________________________________
</TABLE>  John S. Chalsty
 
 
 
                                      II-6
<PAGE>
 
                               POWER OF ATTORNEY
 
  Each person whose signature appears below constitutes and appoints Donald P.
de Brier, John W. Alden, Robert E. Sawyer and Scott A. King his or her true
and lawful attorneys-in-fact and agents, each acting alone, with full powers
of substitution and resubstitution, for him or her and in his or her name,
place and stead, in any and all capacities, to sign any or all Amendments
(including Post-Effective Amendments) to this Registration Statement and/or to
sign any related Registration Statement filed pursuant to Rule 462(b) of the
Securities Act of 1933, as amended, and in each case to file the same, with
all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, each acting alone, with full power and authority to do and perform
each and every act and thing requisite and necessary to be done in and about
the premises, as fully to all intents and purposes as he or she might or could
do in person, hereby ratifying and confirming all that said attorneys-in-fact
and agents, each acting alone, or his or her substitute or substitutes, may
lawfully do or cause to be done by virtue hereof.
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, Oxy Capital
Trust I certifies that it has reasonable grounds to believe that it meets all
the requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Los Angeles, State of California, on December 18,
1998.
 
                                                   OXY CAPITAL TRUST I
 
                                                /s/ J. R. Havert
                                          By: _________________________________
                                              J. R. Havert, Regular Trustee
 
                                                /s/ A. R. Leach
                                          By: _________________________________
                                              A. R. Leach, Regular Trustee
 
                                               /s/ John R. Zaylor
                                          By: _________________________________
                                             John R. Zaylor, Regular Trustee
 
                                     II-7
<PAGE>
 
                               POWER OF ATTORNEY
 
  Each person whose signature appears below constitutes and appoints Donald P.
de Brier, John W. Alden, Robert E. Sawyer and Scott A. King his or her true
and lawful attorneys-in-fact and agents, each acting alone, with full powers
of substitution and resubstitution, for him or her and in his or her name,
place and stead, in any and all capacities, to sign any or all Amendments
(including Post-Effective Amendments) to this Registration Statement and/or to
sign any related Registration Statement filed pursuant to Rule 462(b) of the
Securities Act of 1933, as amended, and in each case to file the same, with
all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, each acting alone, with full power and authority to do and perform
each and every act and thing requisite and necessary to be done in and about
the premises, as fully to all intents and purposes as he or she might or could
do in person, hereby ratifying and confirming all that said attorneys-in-fact
and agents, each acting alone, or his or her substitute or substitutes, may
lawfully do or cause to be done by virtue hereof.
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, Oxy Capital
Trust II certifies that it has reasonable grounds to believe that it meets all
the requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Los Angeles, State of California, on December 18,
1998.
 
                                                  OXY CAPITAL TRUST II
 
                                                /s/ J. R. Havert
                                          By: _________________________________
                                              J. R. Havert, Regular Trustee
 
                                                /s/ A. R. Leach
                                          By: _________________________________
                                              A. R. Leach, Regular Trustee
 
                                               /s/ John R. Zaylor
                                          By: _________________________________
                                             John R. Zaylor, Regular Trustee
 
                                     II-8
<PAGE>
 
                               POWER OF ATTORNEY
 
  Each person whose signature appears below constitutes and appoints Donald P.
de Brier, John W. Alden, Robert E. Sawyer and Scott A. King his or her true
and lawful attorneys-in-fact and agents, each acting alone, with full powers
of substitution and resubstitution, for him or her and in his or her name,
place and stead, in any and all capacities, to sign any or all Amendments
(including Post-Effective Amendments) to this Registration Statement and/or to
sign any related Registration Statement filed pursuant to Rule 462(b) of the
Securities Act of 1933, as amended, and in each case to file the same, with
all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, each acting alone, with full power and authority to do and perform
each and every act and thing requisite and necessary to be done in and about
the premises, as fully to all intents and purposes as he or she might or could
do in person, hereby ratifying and confirming all that said attorneys-in-fact
and agents, each acting alone, or his or her substitute or substitutes, may
lawfully do or cause to be done by virtue hereof.
 
                                  SIGNATURES
 
  Pursuant to the requirements of the Securities Act of 1933, Oxy Capital
Trust III certifies that it has reasonable grounds to believe that it meets
all the requirements for filing on Form S-3 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Los Angeles, State of California, on
December 18, 1998.
 
                                                  OXY CAPITAL TRUST III
 
                                                /s/ J. R. Havert
                                          By: _________________________________
                                              J. R. Havert, Regular Trustee
 
                                                /s/ A. R. Leach
                                          By: _________________________________
                                              A. R. Leach, Regular Trustee
 
                                               /s/ John R. Zaylor
                                          By: _________________________________
                                             John R. Zaylor, Regular Trustee
 
                                     II-9

<PAGE>
 
Exhibit 3.1

                            CERTIFICATE OF TRUST OF
                              OXY CAPITAL TRUST I


     THIS Certificate of Trust of Oxy Capital Trust I (the "Trust"), dated
December 16, 1998,  is being duly executed and filed on behalf of the Trust by
the undersigned, as trustees, to form a business trust under the Delaware
Business Trust Act (12 Del. C. Sec 3801 et seq.) (the "Act").

     1.  Name.  The name of the business trust formed by this Certificate of
Trust is Oxy Capital Trust I.

     2.  Delaware Trustee.  The name and business address of the trustee of the
Trust in the State of Delaware are The Bank of New York (Delaware), White Clay
Center, Route 273, Newark, Delaware 19711.

     3.  Effective Date.  This Certificate of Trust shall be effective upon
filing.

     IN WITNESS WHEREOF, the undersigned, being all of the trustees of the
trust, have duly executed this Certificate of Trust in accordance with Section
3811(a)(1) of the Act.

     J. R. Havert,
     As Trustee

     /s/ J. R. Havert
     -----------------
 
     A. R. Leach,
     As Trustee

     /s/ A. R. Leach
     ---------------

     John R. Zaylor,
     As Trustee

     /s/ John R. Zaylor
     ------------------

     The Bank of New York,
     As Trustee

     By: /s/ T.C. Knight
         ---------------
     Name: T.C. Knight
     Title: Assistant Vice President

     The Bank of New York (Delaware),
     As Delaware Trustee

     By: /s/ Walter N. Gitlin
         --------------------
     Name:  Walter N. Gitlin
     Title:  Authorized Signatory

<PAGE>
 
Exhibit 3.2

                            CERTIFICATE OF TRUST OF
                              OXY CAPITAL TRUST II


     THIS Certificate of Trust of Oxy Capital Trust II (the "Trust"), dated
December 16, 1998,  is being duly executed and filed on behalf of the Trust by
the undersigned, as trustees, to form a business trust under the Delaware
Business Trust Act (12 Del. C. Sec 3801 et seq.) (the "Act").

     1.  Name.  The name of the business trust formed by this Certificate of
Trust is Oxy Capital Trust II.

     2.  Delaware Trustee.  The name and business address of the trustee of the
Trust in the State of Delaware are The Bank of New York (Delaware), White Clay
Center, Route 273, Newark, Delaware 19711.

     3.  Effective Date.  This Certificate of Trust shall be effective upon
filing.

     IN WITNESS WHEREOF, the undersigned, being all of the trustees of the
trust, have duly executed this Certificate of Trust in accordance with Section
3811(a)(1) of the Act.

     J. R. Havert,
     As Trustee

     /s/ J. R. Havert
     ----------------
 
     A. R. Leach,
     As Trustee

     /s/ A. R. Leach
     ---------------

     John R. Zaylor,
     As Trustee

     /s/ John R. Zaylor
     -------------------

     The Bank of New York,
     As Trustee

     By: /s/ T.C. Knight
         ---------------
     Name:  T.C. Knight
     Title:  Assistant Vice President

     The Bank of New York (Delaware),
     As Delaware Trustee

     By: /s/ Walter N. Gitlin
         --------------------
     Name: Walter N. Gitlin
     Title: Authorized Signatory

<PAGE>
 
Exhibit 3.3

                            CERTIFICATE OF TRUST OF
                             OXY CAPITAL TRUST III


     THIS Certificate of Trust of Oxy Capital Trust III (the "Trust"), dated
December 16, 1998,  is being duly executed and filed on behalf of the Trust by
the undersigned, as trustees, to form a business trust under the Delaware
Business Trust Act (12 Del. C. Sec 3801 et seq.) (the "Act").

     1.  Name.  The name of the business trust formed by this Certificate of
Trust is Oxy Capital Trust III.

     2.  Delaware Trustee.  The name and business address of the trustee of the
Trust in the State of Delaware are The Bank of New York (Delaware), White Clay
Center, Route 273, Newark, Delaware 19711.

     3.  Effective Date.  This Certificate of Trust shall be effective upon
filing.

     IN WITNESS WHEREOF, the undersigned, being all of the trustees of the
trust, have duly executed this Certificate of Trust in accordance with Section
3811(a)(1) of the Act.

     J. R. Havert,
     As Trustee

     /s/ J. R. Havert
     ----------------

     A. R. Leach,
     As Trustee

     /s/ A. R. Leach
     ---------------

     John R. Zaylor,
     As Trustee

     /s/ John R. Zaylor
     -------------------

     The Bank of New York,
     As Trustee

     By: /s/ T.C. Knight
         ---------------
     Name:  T.C. Knight
     Title:  Assistant Vice President

     The Bank of New York (Delaware),
     As Delaware Trustee

     By: /s/ Walter N. Gitlin
         --------------------
     Name: Walter N. Gitlin
     Title: Authorized Signatory

<PAGE>
 
                                                                    EXHIBIT 12.1
                                                                                
               OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES
             COMPUTATION OF TOTAL ENTERPRISE RATIOS OF EARNINGS TO
              COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS
                      (Amounts in millions, except ratios)
<TABLE>
<CAPTION>
 
                                     Nine Months Ended
                                       September 30                 Year Ended December 31
                                     -----------------  ------------------------------------------
                                      1998    1997      1997    1996     1995     1994       1993
- ---------------------------------    ------  -----      -----   ------   ------   -----      -----
<S>                                  <C>     <C>        <C>     <C>      <C>      <C>        <C>   
Income (loss) from continuing
  operations(a)                      $  403  $ 401      $ 245   $  486   $   325  $(236)     $(190)
                                     ------  -----      -----   ------   -------  -----      -----
Add:
  Provision (credit) for taxes on
   income (other than foreign
   and gas taxes)                       206    149         47       99       155    (59)       (23)
  Interest and debt expense(b)          424    331        446      492       591    586        598
  Portion of lease rentals
   representative of the interest
   factor                                26     30         39       38        43     50         49
                                     ------  -----      -----   ------    ------  -----      -----
                                        656    510        532      629       789    577        624
                                     ------  -----      -----   ------    ------  -----      -----
Earnings before fixed charges        $1,059  $ 911      $ 777   $1,115    $1,114  $ 341      $ 434
                                     ======  =====      =====   ======    ======  =====      =====
Fixed charges
  Interest and debt expense
   including capitalized
   interest(b)                       $  438  $ 342      $ 462   $  499    $  595  $ 589      $ 609
  Portion of lease rentals
   representative of the interest
   factor                                26     30         39       38        43     50         49
                                     ------  -----      -----   ------    ------  -----      -----
  Total fixed charges                   464    372        501      537       638    639        658
Preferred stock dividends (c)            20     93        106      192       131     97         48
                                     ------  -----      -----   ------    ------  -----      -----
Fixed charges and preferred stock
     dividends                       $  484  $ 465      $ 607   $  729    $  769  $ 736      $ 706
                                     ======  =====      =====   ======    ======  =====      =====
Ratio of earnings to combined fixed
 charges and preferred stock           
  dividends                            2.19   1.96       1.28     1.53      1.45    n/a(d)     n/a(d)
- -----------------------------------  ======  =====      =====   ======    ======  =====      =====
</TABLE>
(a)  Includes (1) minority interest in net income of majority-owned subsidiaries
     having fixed charges and (2) income from less-than-50-percent-owned equity
     investments adjusted to reflect only dividends received.
(b)  Includes proportionate share of interest and debt expense of 50-percent-
     owned equity investments.
(c)  Adjusted to a pretax basis.
(d)  Not computed due to less than one-to-one coverage. Earnings were inadequate
     to cover combined fixed charges and preferred stock dividends by $395
     million in 1994 and $272 million in 1993.
<PAGE>
 
               OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES
      COMPUTATION OF TOTAL ENTERPRISE RATIOS OF EARNINGS TO FIXED CHARGES
                      (Amounts in millions, except ratios)

<TABLE>
<CAPTION>
 
                                                Nine Months Ended
                                                  September 30                         Year Ended December 31
                                             ----------------------     -----------------------------------------------------------
                                                1998         1997          1997         1996         1995        1994        1993
- -------------------------------------        ---------     --------     ---------     --------     --------    --------   ---------
<S>                                          <C>           <C>          <C>           <C>          <C>         <C>        <C>
Income (loss) from continuing
  operations(a)                              $     403     $    401     $    245      $     486    $     325   $   (236)  $  (190)
                                             ---------     --------     --------      ---------    ---------   --------   -------
Add:
  Provision (credit) for taxes on
   income (other than foreign
   and gas taxes)                                  206          149           47             99          155        (59)      (23)
  Interest and debt expense(b)                     424          331          446            492          591        586       598
  Portion of lease rentals
   representative of the interest
   factor                                           26           30           39             38           43         50        49
                                             ---------     --------     --------      ---------    ---------   --------   -------
                                                   656          510          532            629          789        577       624
                                             ---------     --------     --------      ---------    ---------   --------   -------
Earnings before fixed charges                $   1,059     $    911     $    777      $   1,115    $   1,114   $    341   $   434
                                             =========     ========     ========      =========    =========   ========   =======
Fixed charges
  Interest and debt expense
   including capitalized
   interest(b)                               $     438     $    342     $    462      $     499    $     595    $   589   $   609
  Portion of lease rentals
   representative of the interest
   factor                                           26           30           39             38           43         50        49
                                             ---------     --------     --------      ---------    ---------   --------   -------
  Total fixed charges                        $     464     $    372     $    501      $     537    $     638   $    639   $   658
                                             =========     ========     ========      =========    =========   ========   =======
Ratio of earnings to fixed charges                2.28         2.45         1.55           2.08         1.75        n/a(c)    n/a(c)
- -------------------------------------        =========     ========     ========      =========    =========   ========   =======
</TABLE>
(a)  Includes (1) minority interest in net income of majority-owned subsidiaries
     having fixed charges and (2) income from less-than-50-percent-owned equity
     investments adjusted to reflect only dividends received.
(b)  Includes proportionate share of interest and debt expense of 50-percent-
     owned equity investments.
(c)  Not computed due to less than one-to-one coverage. Earnings were inadequate
     to cover fixed charges by $298 million in 1994 and $224 million in 1993.

<PAGE>
 
                                                                    EXHIBIT 23.2

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation by 
reference in this Registration Statement of our reports dated February 16, 1998
included and incorporated by reference in Occidental Petroleum Corporation's 
Form 10-K for the fiscal year ended December 31, 1997 and to all references to
our Firm included in this Registration Statement.

                                             ARTHUR ANDERSEN LLP

Los Angeles, California
December 18, 1998

<PAGE>
 
                                                                    EXHIBIT 23.3

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     We consent to the incorporation by reference in this Registration Statement
of Form S-3 of our report dated November 14, 1997, with respect to the 
statements of financial position of the U.S. Department of Energy Naval 
Petroleum Reserve No. 1 (NPR-1) as of September 30, 1997 and 1996, and the 
related statements of operations and changes in net position, and cash flows for
the year then ended, which appears in Occidental Petroleum Corporation's Current
Report on Form 8-K dated February 10, 1998 (date of earliest event reported), 
and to the reference to our Firm under the heading "Experts" in the prospectus.

     Our report dated November 14, 1997, contains an explanatory paragraph that 
states that the financial statements were prepared in conformity with the 
hierarchy of accounting principles and standards defined in U.S. Office of 
Management and Budget Bulletin No. 94-01, Form and Content of Agency Financial 
Statements. This hierarchy is a comprehensive basis of accounting other than 
generally accepted accounting principles.

     Our report dated November 14, 1997, contains an explanatory paragraph that 
states that on October 6, 1997, DOE announced that Occidental Petroleum 
Corporation had submitted the highest responsible offer at $3.65 billion for all
of the Government's interest in NPR-1.

                                      KPMG PEAT MARWICK LLP

Salt Lake City, Utah
December 17, 1998

<PAGE>
 
                                                                    EXHIBIT 23.4

                      CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the incorporation by reference in the Prospectus 
constituting part of this Registration Statement on Form S-3 of our report dated
July 9, 1998 relating to the Millennium Contributed Business statements of 
income and cash flows, which appears in the Current Report on Form 8-K of 
Occidental Petroleum Corporation dated May 15, 1998.  We also consent to the 
reference to us under the heading of "Experts" in the Prospectus.


PRICEWATERHOUSECOOPERS LLP

Cincinnati, Ohio
December 18, 1998

<PAGE>
 
 
                                                                    EXHIBIT 23.5

                      CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the incorporation by reference in the Prospectus
constituting part of this Registration Statement on Form S-3 of our report dated
July 7, 1998 relating to the financial statements of the Lyondell Contributed
Business and our report dated February 16, 1998, except as to the information
presented in Note 18 which is as of March 20, 1998, relating to the financial
statements of Equistar Chemicals, LP, which appear in the Current Report on Form
8-K of Occidental Petroleum Corporation dated May 15, 1998. We also consent to
the reference to us under the heading of "Experts" in the Prospectus.


PRICEWATERHOUSECOOPERS LLP



Houston, Texas
December 18, 1998


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