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                                                           EXHIBIT 10(b)(xxxiii)

                          RETIREMENT BENEFIT AGREEMENT

This Retirement Benefit Agreement ("Agreement"), effective July 1, 2003, is made
and entered into by Robert J. Allison, Jr. referred to as "Employee" and
Anadarko Petroleum Corporation ("Anadarko" or the "Company").

WHEREAS, as a result of the Employee's agreement to continue with the Company as
Chairman, CEO and President, the Employee and Company agree to the following:

1.       MINIMUM RETIREMENT BENEFIT. If the Employee remains employed with the
         Company beyond July 1, 2003, then, when he is otherwise eligible for
         and elects to receive retirement benefits under the Anadarko Retirement
         Plan (the "Basic Plan") and, if applicable, the Anadarko Retirement
         Restoration Plan (the "Restoration Plan") (collectively, the "Plans"),
         he shall be entitled to receive retirement benefits equal to the
         greater of (a) the benefits calculated under the Plans as of the date
         of his actual retirement (the "Actual Retirement Benefit") or, (b) the
         retirement benefits which would have been payable to him under the
         Plans, calculated as if he had retired on July 1, 2003 (the "2003
         Retirement Benefit"). If the Employee's ultimate retirement benefits
         are payable under (b) above, then the difference between the 2003
         Retirement Benefit and the Actual Retirement Benefit will be paid from
         the Restoration Plan. For purposes of calculating the Plans' lump sum
         benefit under (b) above, the Plans' lump sum factor in effect as of
         July 1, 2003, based on the Employee's age as of that date, will be
         utilized.

         If the Employee remains employed with the Company beyond July 1, 2003
         and dies before he is otherwise eligible for and elects to receive
         retirement benefits under the Plans, then any survivor benefits payable
         under the Plans will be calculated as described in the immediately
         preceding paragraph, provided that any survivor benefits payable from
         the Restoration Plan will be paid in the form of a lump sum.

2.       LIFE INSURANCE BENEFIT. The Company agrees to keep in force, until the
         Employee's retirement date, the following split dollar life insurance
         policies on the life of the Employee: (i) policy number 2102747 with
         Security Life of Denver and (ii) policy number C01600001 with Sun Life
         Financial. Effective July 1, 2003, the Company will also enroll the
         Employee under the Company's Management Life Insurance Plan ("MLIP"),
         as restated on November 1, 2002, and provide the Employee with
         additional life insurance protection as provided under the MLIP. In
         addition, beginning in the calendar year 2003, the Company agrees to
         gross-up the taxes applicable to the Employee as a result of any
         imputed income from the insurance coverage provided under the split
         dollar life insurance policies.

3.       GOVERNING LAW. This Agreement shall be governed by, and construed and
         interpreted in accordance with, the laws of the State of Texas without
         regard to principles of conflict of law.

4.       DEFINED TERMS. Any terms defined in any provision herein, shall have
         equal meaning when used in any other provision of this Agreement.

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5.       ENTIRE AGREEMENT. This Agreement shall constitute the entire Agreement
         between the parties and any prior understanding or representation of
         any kind preceding the date of this Agreement shall not be binding upon
         either party except to the extent incorporated in this Agreement.

6.       MODIFICATIONS. Any modification of this Agreement or additional
         obligation assumed by either party in connection with this Agreement
         shall be binding only if evidenced in writing signed by each party or
         an authorized representative of each party.

7.       SUCCESSOR CLAUSE. As used herein, Anadarko or the Company means
         Anadarko Petroleum Corporation or any successor.

ANADARKO PETROLEUM CORPORATION

By:
         -------------------------------------------------------
         Charles G. Manley
         Executive Vice President, Administration

Dated this     day of            , 2003.
           ---        -----------

EMPLOYEE

By:
         -------------------------------------------------------
         Robert J. Allison, Jr.

Dated this     day of            , 2003.
           ---        -----------<PAGE>

                      [ANADARKO PETROLEUM CORPORATION LOGO]

                                                            EXHIBIT 10(b)(xxxiv)

February 16, 2004

Mr. Robert J. Allison, Jr.
Houston, Texas 77069

Dear Mr. Allison,

             In recognition of your past and continued contributions to Anadarko
Petroleum Corporation (the "Company"), effective with your retirement as an
employee, the Company agrees to provide you with the benefits as set forth in
this Letter Agreement.

1.       Office Space.

         a.       Term. The Company will provide you with an office for your use
during your lifetime. You may terminate this agreement at anytime at your
election

         b.       Office Space. Except as may otherwise be provided herein, you
will have access to and the use of your current office located in the Anadarko
Tower. The Chief Executive Officer ("CEO") of the Company may relocate your
office, in his sole discretion, however, in the event of your relocation, you
will be provided with office space comparable in size to the office you occupy
as of the date of this Letter Agreement in the Anadarko Tower, subject to
availability. If the Company is not able to provide you with office space in the
Anadarko Tower, you will be provided with office space comparable in size to the
office you currently occupy as of the date of this Letter Agreement, as provided
below.

         c.       Relocation. In the event the CEO determines that it is
necessary to relocate your office or if there is a change of control of the
Company, the surviving company may relocate your office from the Anadarko Tower
to Class A office space within 25 miles of one of your residences, at your
election. The size of the office space provided shall be comparable in size to
the office you occupy as of the date of this Letter Agreement. If Class A office
space is not available within 25 miles of the residence you choose, the Company
will either furnish office space at the highest class property available within
25 miles of your residence or furnish Class A office space beyond the 25 mile
limit, as you may decide.

         d.       Secretarial Assistance. At all times during which the Company
provides you with office space, the Company will also provide you with full-time
secretarial assistance.

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Mr. Robert J. Allison, Jr.
February 16, 2004
Page 2

         e.       Furnishings. The furniture currently located in your office
may be used in any office provided by the Company. In the event your office is
relocated, the Company will move the furniture, at the Company's sole expense.

         f.       Utilities. In the event you are relocated to office space
outside the Anadarko Tower, without regard to the reason for such relocation,
the Company will also pay the utilities expense for such space including the
costs to connect your computer to the internet.

2.       Aircraft.

         a.       Term and Usage. The Company will provide you, during your
lifetime, with the use of the Company's aircraft or an alternative aircraft for
up to 200 hours annually. Such annual usage is non-cumulative and unused hours
may not be carried forward to a subsequent year. In the event the Company no
longer maintains aircraft, the Company will provide you with an annual payment
sufficient to allow you to secure comparable aircraft usage on terms and
conditions similar to those set forth in this Letter Agreement.

         b.       Notice. The Company requests that you provide at least 30 days
advance notice to the Company regarding dates of intended usage and travel
plans. You agree to make best efforts to provide such 30 days notice, but this
will not be a requirement or condition to your usage of the aircraft. Notices
may be made either in writing or verbally to such individuals as the Company may
designate.

         c.       Income Tax. You will be responsible for all income tax costs
associated with the imputation of income for personal usage of the Company's
aircraft. These costs will be calculated in accordance with the IRS regulations
regarding the personal usage of a company's aircraft.

3.       Other Services. During your lifetime, the Company will pay the cost for
a monitored security system for your residence currently in Houston, Texas or,
at your election, at another of your residences located in the United States,
comparable to the security system currently in place at your home at the address
set forth above.

             This Letter Agreement is personal to you and may not be assigned in
whole or in part without your consent and shall be binding on the part of the
Company and/or its successors. Also, this Letter Agreement reflects our entire
agreement regarding this matter and all prior correspondence, agreements or
understandings, whether written or oral, with respect hereto, are merged into
and superseded by this Letter Agreement.

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Mr. Robert J. Allison, Jr.
February 16, 2004
Page 3

         If you agree with the matters set forth above, please execute this
Letter Agreement in the space provided.

Sincerely,

/s/ Richard A. Lewis
----------------------------------
Richard A. Lewis
Vice President, Human Resources
Anadarko Petroleum Corporation

Accepted and Agreed:

/s/ Robert J. Allison, Jr.
----------------------------------
Robert J. Allison, Jr.
Chairman of the Board
Anadarko Petroleum Corporation

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