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                                                             EXHIBIT 10(b)(xxxi)

                             KEY EMPLOYEE CHANGE OF
                                CONTROL CONTRACT

         AGREEMENT by and between Anadarko Petroleum Corporation, a Delaware
corporation (the "Company") and James T. Hackett (the "Executive"), dated as of
the 5th day of February, 2004.

         The Board of Directors of the Company (the "Board"), has determined
that it is in the best interests of the Company and its shareholders to assure
that the Company will have the continued dedication of the Executive,
notwithstanding the possibility, threat or occurrence of a Change of Control (as
defined below) of the Company. The Board believes it is imperative to diminish
the inevitable distraction of the Executive by virtue of the personal
uncertainties and risks created by a pending or threatened Change of Control and
to encourage the Executive's full attention and dedication to the Company
currently and in the event of any threatened or pending Change of Control, and
to provide the Executive with compensation and benefits arrangements upon a
Change of Control which ensure that the compensation and benefits expectations
of the Executive will be satisfied and which are competitive with those of other
corporations. Therefore, in order to accomplish these objectives, the Board has
caused the Company to enter into this Agreement.

                 NOW, THEREFORE, IT IS HEREBY AGREED AS FOLLOWS:

         1. Certain Definitions. (a) The "Effective Date" shall mean the first
date during the Change of Control Period (as defined in Section 1(b)) on which a
Change of Control (as defined in Section 2) occurs. Anything in this Agreement
to the contrary notwithstanding, if a Change of Control occurs and if the
Executive's employment with the Company is terminated

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prior to the date on which the Change of Control occurs, and if it is reasonably
demonstrated by the Executive that such termination of employment (i) was at the
request of a third party who has taken steps reasonably calculated to effect a
Change of Control or (ii) otherwise arose in connection with or anticipation of
a Change of Control, then for all purposes of this Agreement the "Effective
Date" shall mean the date immediately prior to the date of such termination of
employment.

         (b) The "Change of Control Period" shall mean the period commencing on
the date hereof and ending on the third anniversary of the date hereof;
provided, however, that commencing on the date one year after the date hereof,
and on each annual anniversary of such date (such date and each annual
anniversary thereof shall be hereinafter referred to as the "Renewal Date"),
unless previously terminated, the Change of Control Period shall be
automatically extended so as to terminate three years from such Renewal Date,
unless at least 90 days prior to the Renewal Date the Company shall give notice
to the Executive that the Change of Control Period shall not be so extended.

         2. Change of Control. For the purpose of this Agreement, a "Change of
Control" shall mean:

                  (a) The acquisition by any individual, entity or group (within
         the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange
         Act of 1934, as amended (the "Exchange Act")) (a "Person") of
         beneficial ownership (within the meaning of Rule 13d-3 promulgated
         under the Exchange Act) of 20% or more of either (i) the then
         outstanding shares of common stock of the Company (the "Outstanding
         Company Common Stock") or (ii) the combined voting power of the then
         outstanding voting securities of the


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         Company entitled to vote generally in the election of directors (the
         "Outstanding Company Voting Securities"); provided, however, that for
         purposes of this subsection (a), the following acquisitions shall not
         constitute a Change of Control: (i) any acquisition directly from the
         Company, (ii) any acquisition by the Company, (iii) any acquisition by
         any employee benefit plan (or related trust) sponsored or maintained by
         the Company or any corporation controlled by the Company or (iv) any
         acquisition pursuant to a transaction which complies with clauses (i),
         (ii) and (iii) of subsection (c) of this Section 2; or

                  (b) Individuals who, as of the date hereof, constitute the
         Board (the "Incumbent Board") cease for any reason to constitute at
         least a majority of the Board; provided, however, that any individual
         becoming a director subsequent to the date hereof whose election, or
         nomination for election by the Company's shareholders, was approved by
         a vote of at least a majority of the directors then comprising the
         Incumbent Board shall be considered as though such individual were a
         member of the Incumbent Board, but excluding, for this purpose, any
         such individual whose initial assumption of office occurs as a result
         of an actual or threatened election contest with respect to the
         election or removal of directors or other actual or threatened
         solicitation of proxies or consents by or on behalf of a Person other
         than the Board; or

                  (c) Consummation by the Company of a reorganization, merger or
         consolidation or sale or other disposition of all or substantially all
         of the assets of the Company or the acquisition of assets of another
         entity (a "Business Combination"), in each case, unless, following such
         Business Combination, (i) all or substantially all of the individuals
         and entities who were the beneficial owners, respectively, of the
         Outstanding Company Common Stock and Outstanding Company Voting
         Securities immediately prior to such


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         Business Combination beneficially own, directly or indirectly, more
         than 60% of, respectively, the then outstanding shares of common stock
         and the combined voting power of the then outstanding voting securities
         entitled to vote generally in the election of directors, as the case
         may be, of the corporation resulting from such Business Combination
         (including, without limitation, a corporation which as a result of such
         transaction owns the Company or all or substantially all of the
         Company's assets either directly or through one or more subsidiaries)
         in substantially the same proportions as their ownership, immediately
         prior to such Business Combination of the Outstanding Company Common
         Stock and Outstanding Company Voting Securities, as the case may be,
         (ii) no Person (excluding any employee benefit plan (or related trust)
         of the Company or such corporation resulting from such Business
         Combination) beneficially owns, directly or indirectly, 20% or more of,
         respectively, the then outstanding shares of common stock of the
         corporation resulting from such Business Combination or the combined
         voting power of the then outstanding voting securities of such
         corporation except to the extent that such ownership existed prior to
         the Business Combination and (iii) at least a majority of the members
         of the board of directors of the corporation resulting from such
         Business Combination were members of the Incumbent Board at the time of
         the execution of the initial agreement, or of the action of the Board,
         providing for such Business Combination; or

                  (d) Approval by the shareholders of the Company of a complete
         liquidation or dissolution of the Company.

         3. Employment Period. The Company hereby agrees to continue the
Executive in its employ, and the Executive hereby agrees to remain in the employ
of the Company


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subject to the terms and conditions of this Agreement, for the period commencing
on the Effective Date and ending on the third anniversary of such date (the
"Employment Period").

         4. Terms of Employment. (a) Position and Duties. (i) During the
Employment Period, (A) the Executive's position (including status, offices,
titles and reporting requirements), authority, duties and responsibilities shall
be at least commensurate in all material respects with the most significant of
those held, exercised and assigned to the Executive at any time during the
120-day period immediately preceding the Effective Date and (B) the Executive's
services shall be performed at the location where the Executive was employed
immediately preceding the Effective Date or any office or location less than 35
miles from such location.

                  (ii) During the Employment Period, and excluding any periods
of vacation and sick leave to which the Executive is entitled, the Executive
agrees to devote reasonable attention and time during normal business hours to
the business and affairs of the Company and, to the extent necessary to
discharge the responsibilities assigned to the Executive hereunder, to use the
Executive's reasonable best efforts to perform faithfully and efficiently such
responsibilities. During the Employment Period it shall not be a violation of
this Agreement for the Executive to (A) serve on corporate, civic or charitable
boards or committees, (B) deliver lectures, fulfill speaking engagements or
teach at educational institutions and (C) manage personal investments, so long
as such activities do not significantly interfere with the performance of the
Executive's responsibilities as an employee of the Company in accordance with
this Agreement. It is expressly understood and agreed that to the extent that
any such activities have been conducted by the Executive prior to the Effective
Date, the continued conduct of such activities (or the conduct of activities
similar in nature and scope thereto) subsequent to the Effective Date


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shall not thereafter be deemed to interfere with the performance of the
Executive's responsibilities to the Company.

         (b) Compensation. (i) Base Salary. During the Employment Period, the
Executive shall receive an annual base salary ("Annual Base Salary"), which
shall be paid at a monthly rate, at least equal to twelve times the highest
monthly base salary paid or payable, including any base salary which has been
earned but deferred, to the Executive by the Company and its affiliated
companies in respect of the twelve-month period immediately preceding the month
in which the Effective Date occurs. During the Employment Period, the Annual
Base Salary shall be reviewed no more than 12 months after the last salary
increase awarded to the Executive prior to the Effective Date and thereafter at
least annually. Any increase in Annual Base Salary shall not serve to limit or
reduce any other obligation to the Executive under this Agreement. Annual Base
Salary shall not be reduced after any such increase and the term Annual Base
Salary as utilized in this Agreement shall refer to Annual Base Salary as so
increased. As used in this Agreement, the term "affiliated companies" shall
include any company controlled by, controlling or under common control with the
Company.

                 (ii) Annual Bonus. In addition to Annual Base Salary, the
Executive shall be awarded, for each fiscal year ending during the Employment
Period, an annual bonus (the "Annual Bonus") in cash at least equal to the
Executive's target annual bonus under the Company's Annual Incentive Bonus Plan,
or any comparable bonus under any predecessor or successor plan, for the fiscal
year in which the Effective Date occurs, which shall be calculated as follows:
(A) the target bonus percentage as established by the Board prior to the
Effective Date for the fiscal year in which the Effective Date occurs,
multiplied by (B) the Executive's Annual Base Salary (the "Recent Annual
Bonus"). In the event that, prior to the Effective Date,


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the Executive's target bonus percentage has not been established by the Board
under the Annual Incentive Bonus Plan or any comparable bonus under any
predecessor or successor plan, then for purposes of this Agreement, the
Executive's Recent Annual Bonus shall be calculated by using the target bonus
percentage for the other executives in the Executive's peer group (determined
based on title, responsibilities and duties) who are parties to a Key Employee
Change of Control Contract. Such Annual Bonus shall be paid no later than
January 31 of the fiscal year next following the fiscal year for which the
Annual Bonus is awarded, unless the Executive shall elect to defer the receipt
of such Annual Bonus.

                 (iii) Incentive, Savings and Retirement Plans. During the
Employment Period, the Executive shall be entitled to participate in all
incentive, savings and retirement plans, practices, policies and programs
applicable generally to other peer executives of the Company and its affiliated
companies, but in no event shall such plans, practices, policies and programs
provide the Executive with incentive opportunities (measured with respect to
regular, annual incentive opportunities, including stock options, restricted
stock and/or performance units, savings opportunities and retirement benefit
opportunities, in each case, less favorable, in the aggregate, than the most
favorable of those provided by the Company and its affiliated companies for the
Executive under such plans, practices, policies and programs as in effect at any
time during (i) with respect to regular, annual incentive opportunities,
including stock options, restricted stock and/or performance units, the one year
period immediately preceding the Effective Date and (ii) with respect to all
other items, the 120-day period immediately preceding the Effective Date or if
more favorable to the Executive, those provided generally at any time after the
Effective Date to other peer executives of the Company and its affiliated
companies.


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                  (iv) Welfare Benefit Plans. During the Employment Period, the
Executive and/or the Executive's family, as the case may be, shall be eligible
for participation in and shall receive all benefits under welfare benefit plans,
practices, policies and programs provided by the Company and its affiliated
companies (including, without limitation, medical, prescription, dental,
disability, salary continuance, employee life, group life, accidental death and
travel accident insurance plans and programs) to the extent applicable generally
to other peer executives of the Company and its affiliated companies, but in no
event shall such plans, practices, policies and programs provide the Executive
with benefits which are less favorable, in the aggregate, than the most
favorable of such plans, practices, policies and programs in effect for the
Executive at any time during the 120-day period immediately preceding the
Effective Date or, if more favorable to the Executive, those provided generally
at any time after the Effective Date to other peer executives of the Company and
its affiliated companies.

                  (v) Expenses. During the Employment Period, the Executive
shall be entitled to receive prompt reimbursement for all reasonable expenses
incurred by the Executive in accordance with the most favorable policies,
practices and procedures of the Company and its affiliated companies in effect
for the Executive at any time during the 120-day period immediately preceding
the Effective Date or, if more favorable to the Executive, as in effect
generally at any time thereafter with respect to other peer executives of the
Company and its affiliated companies.

                  (vi) Fringe Benefits. During the Employment Period, the
Executive shall be entitled to fringe benefits, including, without limitation,
tax and financial planning services, payment of club dues, and, if applicable,
use of an automobile and payment of related expenses, in accordance with the
most favorable plans, practices, programs and policies of the


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Company and its affiliated companies in effect for the Executive at any time
during the 120-day period immediately preceding the Effective Date or, if more
favorable to the Executive, as in effect generally at any time thereafter with
respect to other peer executives of the Company and its affiliated companies.

                  (vii) Office and Support Staff. During the Employment Period,
the Executive shall be entitled to an office or offices of a size and with
furnishings and other appointments, and to exclusive personal secretarial and
other assistance, at least equal to the most favorable of the foregoing provided
to the Executive by the Company and its affiliated companies at any time during
the 120-day period immediately preceding the Effective Date or, if more
favorable to the Executive, as provided generally at any time thereafter with
respect to other peer executives of the Company and its affiliated companies.

                  (viii) Vacation. During the Employment Period, the Executive
shall be entitled to paid vacation in accordance with the most favorable plans,
policies, programs and practices of the Company and its affiliated companies as
in effect for the Executive at any time during the 120-day period immediately
preceding the Effective Date or, if more favorable to the Executive, as in
effect generally at any time thereafter with respect to other peer executives of
the Company and its affiliated companies.

                  (ix) Employment Agreement Provisions. Without limiting the
generality of the foregoing, the following provisions of the Employment
Agreement between the Company and the Executive dated as of February 5, 2004
(the "Employment Agreement") shall continue in effect following the Effective
Date to the extent the Company's obligations thereunder have not previously been
satisfied in full: Section 3.6 (providing for the grant of certain


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performance units); Section 3.9 (providing for special compensation); Section
3.10 (providing for special pension service crediting) and Section 8.15
(providing for indemnification).

         5. Termination of Employment. (a) Death or Disability. The Executive's
employment shall terminate automatically upon the Executive's death during the
Employment Period. If the Company determines in good faith that the Disability
of the Executive has occurred during the Employment Period (pursuant to the
definition of Disability set forth below), it may give to the Executive written
notice in accordance with Section 12(b) of this Agreement of its intention to
terminate the Executive's employment. In such event, the Executive's employment
with the Company shall terminate effective on the 30th day after receipt of such
notice by the Executive (the "Disability Effective Date"), provided that, within
the 30 days after such receipt, the Executive shall not have returned to
full-time performance of the Executive's duties. For purposes of this Agreement,
"Disability" shall mean the absence of the Executive from the Executive's duties
with the Company on a full-time basis for 180 consecutive business days as a
result of incapacity due to mental or physical illness which is determined to be
total and permanent by a physician selected by the Company or its insurers and
acceptable to the Executive or the Executive's legal representative.

         (b) Retirement. The Executive's employment shall terminate
automatically upon the Executive's Retirement. For purposes of this Agreement,
"Retirement" shall mean termination of the Executive's employment by the Company
for any reason on or after the first day of the month next following the
Executive's 65th birthday (the "Normal Retirement Date") or termination by the
Executive upon the satisfaction of the requirements for early retirement (the
"Early Retirement Date") under the early retirement provisions of the Company's
Retirement Plan (the "Retirement Plan"). Notwithstanding anything to the
contrary, if the Executive


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terminates employment for Good Reason, such termination shall not be deemed to
be a Retirement for purposes of this Agreement despite the fact that the
Executive may qualify for early retirement under the Company's Retirement Plan.

         (c) Cause. The Company may terminate the Executive's employment during
the Employment Period for Cause. For purposes of this Agreement, "Cause" shall
mean:

                  (i) the willful and continued failure of the Executive to
         perform substantially the Executive's duties with the Company or one of
         its affiliates (other than any such failure resulting from incapacity
         due to physical or mental illness), after a written demand for
         substantial performance is delivered to the Executive by the Board or
         the Chief Executive Officer of the Company which specifically
         identifies the manner in which the Board or Chief Executive Officer
         believes that the Executive has not substantially performed the
         Executive's duties, or

                  (ii) the willful engaging by the Executive in illegal conduct
         or gross misconduct which is materially and demonstrably injurious to
         the Company.

For purposes of this provision, no act or failure to act, on the part of the
Executive, shall constitute grounds for "Cause" unless such act or failure to
act would also have constituted "Cause" under the Employment Agreement, and no
act or failure to act, on the part of the Executive, shall be considered
"willful" unless it is done, or omitted to be done, by the Executive in bad
faith or without reasonable belief that the Executive's action or omission was
in the best interests of the Company. Any act, or failure to act, based upon
authority given pursuant to a resolution duly adopted by the Board or upon the
instructions of the Chief Executive Officer or a senior officer of the Company
or based upon the advice of counsel for the Company shall be conclusively
presumed to be done, or omitted to be done, by the Executive in good faith and
in the best interests of the Company. The cessation of employment of the
Executive shall not be deemed to be for Cause unless and until there shall have
been delivered to the Executive a copy of a resolution duly adopted by the
affirmative vote of not less than three-quarters of the entire membership of


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the Board at a meeting of the Board called and held for such purpose (after
reasonable notice is provided to the Executive and the Executive is given an
opportunity, together with counsel, to be heard before the Board), finding that,
in the good faith opinion of the Board, the Executive is guilty of the conduct
described in subparagraph (i) or (ii) above, and specifying the particulars
thereof in detail.

         (d) Good Reason. The Executive's employment may be terminated by the
Executive for Good Reason. For purposes of this Agreement, Good Reason shall
mean:

                  (i) the assignment to the Executive of any duties inconsistent
         in any respect with the Executive's position (including status,
         offices, titles and reporting requirements), authority, duties or
         responsibilities as contemplated by Section 4(a) of this Agreement, or
         any other action by the Company which results in a diminution in such
         position, authority, duties or responsibilities, excluding for this
         purpose an isolated, insubstantial and inadvertent action not taken in
         bad faith and which is remedied by the Company promptly after receipt
         of notice thereof given by the Executive;

                  (ii) any failure by the Company to comply with any of the
         provisions of Section 4(b) of this Agreement, other than an isolated,
         insubstantial and inadvertent failure not occurring in bad faith and
         which is remedied by the Company promptly after receipt of notice
         thereof given by the Executive;

                  (iii) the Company's requiring the Executive to be based at any
         office or location other than as provided in Section 4(a)(i)(B) hereof
         or the Company's requiring the Executive to travel on Company business
         to a substantially greater extent than required immediately prior to
         the Effective Date;

                  (iv) any purported termination by the Company of the
         Executive's employment otherwise than as expressly permitted by this
         Agreement;

                  (v) any failure by the Company to comply with and satisfy
         Section 11(c) of this Agreement; or

                  (vi) any action or inaction not described in clauses (i)
         through (v) above but which would have constituted "Good Reason" under
         the Employment Agreement.

For purposes of this Section 5(d), any good faith determination of "Good Reason"
made by the Executive shall be conclusive. Anything in this Agreement to the
contrary notwithstanding, a


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termination by the Executive for any reason during the 30-day period immediately
following the first anniversary of the Effective Date (unless such Effective
Date is attributable to the consummation by the Company of a Business
Combination which constitutes a Change of Control and as set out in Section
2(c)(iii), at least a majority of the members of the board of directors of the
corporation resulting from such Business Combination were members of the
Incumbent Board at the time of the execution of the initial agreement, or of the
action of the Board, providing for such Business Combination) shall be deemed to
be a termination for Good Reason for all purposes of this Agreement.

         (e) Notice of Termination. Any termination by the Company for Cause, or
by the Executive for Good Reason, shall be communicated by Notice of Termination
to the other party hereto given in accordance with Section 12(b) of this
Agreement. For purposes of this Agreement, a "Notice of Termination" means a
written notice which (i) indicates the specific termination provision in this
Agreement relied upon, (ii) to the extent applicable, sets forth in reasonable
detail the facts and circumstances claimed to provide a basis for termination of
the Executive's employment under the provision so indicated and (iii) if the
Date of Termination (as defined below) is other than the date of receipt of such
notice, specifies the termination date (which date shall be not more than thirty
days after the giving of such notice). The failure by the Executive or the
Company to set forth in the Notice of Termination any fact or circumstance which
contributes to a showing of Good Reason or Cause shall not waive any right of
the Executive or the Company, respectively, hereunder or preclude the Executive
or the Company, respectively, from asserting such fact or circumstance in
enforcing the Executive's or the Company's rights hereunder.


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         (f) Date of Termination. "Date of Termination" means (i) if the
Executive's employment is terminated by the Company for Cause, or by the
Executive for Good Reason, the date of receipt of the Notice of Termination or
any later date specified therein, as the case may be, (ii) if the Executive's
employment is terminated by the Company other than for Cause or Disability, the
date on which the Company notifies the Executive of such termination, (iii) if
the Executive's employment is terminated by reason of Retirement, either the
date on which the Company notifies the Executive of such termination (on or
after the Normal Retirement Date) or the date on which the Executive ceases
employment with the Company (on or after the Executive's Early Retirement Date),
as the case may be, and (iv) if the Executive's employment is terminated by
reason of death or Disability, the date of death of the Executive or the
Disability Effective Date, as the case may be.

         6. Obligations of the Company upon Termination. (a) Good Reason; Other
Than for Cause, Retirement, Death or Disability. If, during the Employment
Period, the Company shall terminate the Executive's employment other than for
Cause, Retirement or Disability or the Executive shall terminate employment for
Good Reason, the Company shall provide the Executive with the following
compensation and benefits; provided, that in the event that the Termination
Benefits under Article 7 of the Employment Agreement, together with the Other
Benefits and any accrued and unpaid Annual Base Salary and vacation pay, would
have been in the aggregate more favorable to the Executive, the Company shall
instead provide the Executive with such Termination Benefits, Other Benefits and
any accrued and unpaid Annual Base Salary and vacation pay.

                  (i) The Company shall pay to the Executive in a lump sum in
cash within 20 days after the Date of Termination the aggregate of the following
amounts:


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                  A. the sum of (1) the Executive's Annual Base Salary through
         the Date of Termination to the extent not theretofore paid, (2) the
         product of (x) the higher of (I) the highest annual bonus earned by the
         Executive for the last three fiscal years prior to the Effective Date
         and (II) the Annual Bonus paid or payable for the most recently
         completed fiscal year during the Employment Period, in each case,
         including any bonus or portion thereof which has been earned but
         deferred (and annualized for any fiscal year consisting of less than
         twelve full months or during which the Executive was employed for less
         than twelve full months) (such higher amount being referred to as the
         "Highest Annual Bonus") and (y) a fraction, the numerator of which is
         the number of days in the current fiscal year through the Date of
         Termination, and the denominator of which is 365 (the "Pro-Ration
         Fraction") and (3) any accrued vacation pay, to the extent not
         theretofore paid (the sum of the amounts described in clauses (1), (2),
         and (3) shall be hereinafter referred to as the "Accrued Obligations");
         and

                  B. an amount equal to the product of (1) the lesser of (x) 2.9
         and (y) the number of years (with partial years expressed as a fraction
         thereof) remaining until the Executive reaches the Normal Retirement
         Date and (2) the sum of (x) the Executive's Annual Base Salary and (y)
         the Highest Annual Bonus; and

                  C. an amount equal to the total value of the Executive's
         Restoration Account (as defined in the Company's Savings Restoration
         Plan (the "SRP")), with such amount being the higher of (1) the value
         of the Executive's Restoration Account on the Executive's Date of
         Termination or (2) the value of the Executive's Restoration Account on
         the date of the Change of Control, in each case with "value" determined
         under the applicable change of control provisions in the SRP; and

                  D. an amount equal to the additional Company matching
         contributions which would have been made on the Executive's behalf in
         the Company's Employee Savings Plan (the "ESP") (assuming continued
         participation on the same basis as immediately prior to the Effective
         Date), plus the additional amount of any benefit the Executive would
         have accrued under the SRP as a result of contribution limitations in
         the ESP, until the earliest to occur of (1) the expiration of the
         36-month period following the Date of Termination and (2) the
         Executive's Normal Retirement Date (with the Company's matching
         contributions being determined pursuant to the applicable provisions of
         the ESP and the SRP and based upon the Executive's compensation
         (including any amounts deferred pursuant to any deferred compensation
         program) in effect for the 12-month period immediately prior to the
         Effective Date); and

                  E. an amount equal to the sum of the present values, as of the
         Date of Termination, of (1) the accrued retirement benefit payable
         under the Company's Retirement Restoration Plan (the "RRP") and (2) the
         additional retirement benefits that the Executive would have accrued
         under the Retirement Plan and the RRP (taking into account the special
         pension service crediting


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         provided for in Section 3.10 of the Employment Agreement) if the
         Executive had continued employment until the earliest to occur of (a)
         the expiration of the three year period following the Date of
         Termination and (b) the Executive's Normal Retirement Date (assuming
         that the Executive's compensation in each of the additional years is
         that required by Section 4(b)(i) and Section 4(b)(ii) hereof), with the
         present values being computed by discounting to the Date of Termination
         the accrued benefit and the additional retirement benefits payable as
         lump sums at an assumed benefit commencement date of the later of (i)
         the date the Executive attains age 55 and (ii) the date three years
         after the Date of Termination (but in no event later than Normal
         Retirement Date), at the rate of interest used for valuing lump-sum
         payments in excess of $25,000 for participants with retirement benefits
         commencing immediately under the Retirement Plan, as in effect as of
         the Effective Date; and

                  (ii) The Company shall, at its sole expense as incurred,
provide the Executive with (A) financial planning services until the third
anniversary of the Date of Termination on the same basis as was provided
immediately prior to the Date of Termination, and (B) outplacement services at a
cost to the Company not to exceed $30,000, the scope and provider of which shall
be selected by the Executive in the Executive's sole discretion; and

                  (iii) Until the earlier of (A) the third anniversary of the
Date of Termination and (B) the Executive's reaching the Normal Retirement Date,
the Company shall maintain in full force and effect for the Executive all life,
accident, disability, medical and health care benefit plans and programs or
arrangements in which the Executive was entitled to participate, at the same
levels and rates, in which the Executive was participating immediately prior to
the Effective Date, provided that the Executive's continued participation is
possible under the general terms and provisions of such plans and programs,
provided, however, that if the Executive becomes reemployed with another
employer and is eligible to receive medical or other welfare benefits under
another employer-provided plan, the medical and other welfare benefits described
herein shall be secondary to those provided under such other plan during such
applicable period of eligibility. In the event that the Executive's
participation in any such plan or program is barred due to the eligibility and
participation requirements of such plan or program as then in effect, the
Company shall arrange to provide benefits substantially similar to those to
which the Executive was entitled to receive under such plans and programs of the
Company prior to the Effective Date. In such event, appropriate adjustments
shall be made so that the after-tax value thereof to the Executive is similar to
the after-tax value of the benefit plans in which participation is barred.
Benefits provided pursuant to this paragraph are contractual only and are not to
be considered a continuation of coverage as provided under Section 601 et seq.
of ERISA and Section 4980B of the Code. For purposes of determining the
Executive's eligibility (but not the time of commencement of benefits) for
retiree benefits pursuant to such plans and programs, the Executive shall be
considered to have remained employed until three years after the Date of
Termination and to have retired on the last day of such period, and, if the
Executive satisfies the eligibility requirements, such benefits shall commence
no later than the expiration of the three year continuation period provided in
clause (A) of this Section 6(a)(iii); and


                                       16
<PAGE>

                  (iv) the Initial Option (as defined in the Employment
         Agreement) and any other Options (as defined in the Employment
         Agreement) that may have been granted to the Executive, to the extent
         then outstanding, shall be vested in full upon the Date of Termination
         and shall remain exercisable thereafter for the period provided
         pursuant to the terms thereof, which period shall not be less than
         twelve months (but in no event shall any Option be exercisable after
         the expiration of its full original term), and any portion of the
         Initial Restricted Stock (as defined in the Employment Agreement) and
         any other restricted Shares (as defined in the Employment Agreement)
         that may have been granted to the Executive that have not yet vested
         shall vest in full upon the Date of Termination; and

                  (v) To the extent not theretofore paid or provided, the
         Company shall timely pay or provide to the Executive any other amounts
         or benefits required to be paid or provided or which the Executive is
         eligible to receive under Sections 3.6, 3.9, 3.10 or 8.15 of the
         Employment Agreement or any other plan, program, policy or practice or
         contract or agreement of the Company and its affiliated companies (such
         other amounts and benefits shall be hereinafter referred to as the
         "Other Benefits").

         (b) Death. If the Executive's employment is terminated by reason of the
Executive's death during the Employment Period, this Agreement shall terminate
without further obligations to the Executive's legal representatives under this
Agreement, other than for payment of Accrued Obligations and the timely payment
or provision of Other Benefits. Accrued Obligations shall be paid to the
Executive's estate or beneficiary, as applicable, in a lump sum in cash within
20 days of the Date of Termination. With respect to the provision of Other
Benefits, the term Other Benefits as utilized in this Section 6(b) shall
include, without limitation, and the Executive's estate and/or beneficiaries
shall be entitled to receive, benefits at least equal to the most favorable
benefits provided by the Company and affiliated companies to the estates and
beneficiaries of peer executives of the Company and such affiliated companies
under such plans, programs, practices and policies relating to death benefits,
if any, as in effect with respect to other peer executives and their
beneficiaries at any time during the 120-day period immediately preceding the
Effective Date or, if more favorable to the Executive's estate and/or the
Executive's beneficiaries, as in effect on the date of the Executive's death
with respect to other peer executives of the Company and its affiliated
companies and their beneficiaries.


                                       17
<PAGE>

         (c) Disability. If the Executive's employment is terminated by reason
of the Executive's Disability during the Employment Period, this Agreement shall
terminate without further obligations to the Executive, other than for payment
of Accrued Obligations and the timely payment or provision of Other Benefits.
Accrued Obligations shall be paid to the Executive in a lump sum in cash within
20 days of the Date of Termination. With respect to the provision of Other
Benefits, the term Other Benefits as utilized in this Section 6(c) shall
include, and the Executive shall be entitled after the Disability Effective Date
to receive, disability and other benefits at least equal to the most favorable
of those generally provided by the Company and its affiliated companies to
disabled executives and/or their families in accordance with such plans,
programs, practices and policies relating to disability, if any, as in effect
generally with respect to other peer executives and their families at any time
during the 120-day period immediately preceding the Effective Date or, if more
favorable to the Executive and/or the Executive's family, as in effect at any
time thereafter generally with respect to other peer executives of the Company
and its affiliated companies and their families.

         (d) Retirement. If the Executive voluntarily terminates his employment
by reason of Retirement, this Agreement shall terminate without further
obligations to the Executive other than for Accrued Obligations and the timely
payment or provision of Other Benefits. In such case, all Accrued Obligations
shall be paid to the Executive in a lump sum in cash within 20 days of the Date
of Termination. If the Company shall terminate the Executive's employment for
Retirement, the Company shall provide the Executive with the Termination
Benefits described in Article 7 of the Employment Agreement, together with the
Other Benefits and any accrued and unpaid Annual Base Salary and vacation pay.


                                       18
<PAGE>

         (e) Cause; Other than for Good Reason. If the Executive's employment
shall be terminated for Cause during the Employment Period, this Agreement shall
terminate without further obligations to the Executive other than the obligation
to pay to the Executive (i) the Annual Base Salary through the Date of
Termination, (ii) the amount of any compensation previously deferred by the
Executive, and (iii) Other Benefits, in each case to the extent theretofore
unpaid. If the Executive voluntarily terminates employment during the Employment
Period, excluding a termination for Good Reason, this Agreement shall terminate
without further obligations to the Executive, other than for Accrued Obligations
and the timely payment or provision of Other Benefits. In such case, all Accrued
Obligations shall be paid to the Executive in a lump sum in cash within 20 days
of the Date of Termination.

         7. Non-exclusivity of Rights. Nothing in this Agreement shall prevent
or limit the Executive's continuing or future participation in any plan,
program, policy or practice provided by the Company or any of its affiliated
companies and for which the Executive may qualify, nor, subject to Section
12(f), shall anything herein limit or otherwise affect such rights as the
Executive may have under any contract or agreement with the Company or any of
its affiliated companies. Amounts which are vested benefits or which the
Executive is otherwise entitled to receive under any plan, policy, practice or
program of or any contract or agreement with the Company or any of its
affiliated companies, including, but not limited to, the Company's Management
Life Insurance Plan and Override Pool Bonus Plan, at or subsequent to the Date
of Termination shall be payable in accordance with such plan, policy, practice
or program or contract or agreement except as explicitly modified by this
Agreement. Without limiting the generality of the foregoing, there shall be no
duplication of any of the payments or benefits described in Section 6 hereof,
and payments under paragraphs C, E and F of Section 6(a)(i) shall be in full


                                       19
<PAGE>


satisfaction of the amounts otherwise payable under the SRP, the RRP and the
Executive Deferred Compensation Plans, respectively.

         8. Full Settlement; Legal Fees. The Company's obligation to make the
payments provided for in this Agreement and otherwise to perform its obligations
hereunder shall not be affected by any set-off, counterclaim, recoupment,
defense or other claim, right or action which the Company may have against the
Executive or others. In no event shall the Executive be obligated to seek other
employment or take any other action by way of mitigation of the amounts payable
to the Executive under any of the provisions of this Agreement and except as
specifically provided in Section 6(a)(iii), such amounts shall not be reduced
whether or not the Executive obtains other employment. The Company agrees to pay
as incurred, to the full extent permitted by law, all legal fees and expenses
which the Executive may reasonably incur as a result of any contest (regardless
of the outcome thereof) by the Company, the Executive or others of the validity
or enforceability of, or liability or entitlement under, any provision of this
Agreement or any guarantee of performance thereof (whether such contest is
between the Company and the Executive or between either of them and any third
party, and including as a result of any contest by the Executive about the
amount of any payment pursuant to this Agreement), plus in each case interest on
any delayed payment at the applicable Federal rate provided for in Section
7872(f)(2)(A) of the Internal Revenue Code of 1986, as amended (the "Code").

         9. Certain Additional Payments by the Company.

         (a) Anything in this Agreement to the contrary notwithstanding, in the
event it shall be determined that any payment or distribution by the Company to
or for the benefit of the Executive (whether paid or payable or distributed or
distributable pursuant to the terms of this

                                       20
<PAGE>

Agreement or otherwise, but determined without regard to any additional payments
required under this Section 9) (a "Payment") would be subject to the excise tax
imposed by Section 4999 of the Code or any corresponding provisions of state or
local tax laws, or any interest or penalties are incurred by the Executive with
respect to such excise tax (such excise tax, together with any such interest and
penalties, are hereinafter collectively referred to as the "Excise Tax"), then
the Executive shall be entitled to receive an additional payment (a "Gross-Up
Payment") in an amount such that after payment by the Executive of all taxes
(including any interest or penalties imposed with respect to such taxes),
including, without limitation, any income taxes (and any interest and penalties
imposed with respect thereto) and Excise Tax imposed upon the Gross-Up Payment,
the Executive retains an amount of the Gross-Up Payment equal to the Excise Tax
imposed upon the Payments.

         (b) Subject to the provisions of Section 9(c), all determinations
required to be made under this Section 9, including whether and when a Gross-Up
Payment is required and the amount of such Gross-Up Payment and the assumptions
to be utilized in arriving at such determination, shall be made by KPMG LLP or
such other certified public accounting firm as may be designated by the
Executive (the "Accounting Firm"), which shall provide detailed supporting
calculations both to the Company and the Executive within 15 business days of
the receipt of notice from the Executive that there has been a Payment, or such
earlier time as is requested by the Company. In the event that the Accounting
Firm is serving as accountant or auditor for the individual, entity or group
effecting the Change of Control, the Executive shall appoint another nationally
recognized accounting firm to make the determinations required hereunder (which
accounting firm shall then be referred to as the Accounting Firm hereunder). All
fees and expenses of the Accounting Firm shall be borne solely by the Company.
Any Gross-Up


                                       21
<PAGE>

Payment, as determined pursuant to this Section 9, shall be paid by the Company
to the Executive within five days of the receipt of the Accounting Firm's
determination. Any determination by the Accounting Firm shall be binding upon
the Company and the Executive. As a result of the uncertainty in the application
of Section 4999 of the Code at the time of the initial determination by the
Accounting Firm hereunder, it is possible that Gross-Up Payments which will not
have been made by the Company should have been made ("Underpayment"), consistent
with the calculations required to be made hereunder. In the event that the
Company exhausts its remedies pursuant to Section 9(c) and the Executive
thereafter is required to make a payment of any Excise Tax, the Accounting Firm
shall determine the amount of the Underpayment that has occurred and any such
Underpayment shall be promptly paid by the Company to or for the benefit of the
Executive.

         (c) The Executive shall notify the Company in writing of any claim by
the Internal Revenue Service that, if successful, would require the payment by
the Company of the Gross-Up Payment. Such notification shall be given as soon as
practicable but no later than ten business days after the Executive is informed
in writing of such claim and shall apprise the Company of the nature of such
claim and the date on which such claim is requested to be paid. The Executive
shall not pay such claim prior to the expiration of the 30-day period following
the date on which the Executive gives such notice to the Company (or such
shorter period ending on the date that any payment of taxes with respect to such
claim is due). If the Company notifies the Executive in writing prior to the
expiration of such period that it desires to contest such claim, the Executive
shall:

                  (i) give the Company any information reasonably requested by
         the Company relating to such claim,


                                       22
<PAGE>

                  (ii) take such action in connection with contesting such claim
         as the Company shall reasonably request in writing from time to time,
         including, without limitation, accepting legal representation with
         respect to such claim by an attorney reasonably selected by the
         Company,

                  (iii) cooperate with the Company in good faith in order
         effectively to contest such claim, and

                  (iv) permit the Company to participate in any proceedings
         relating to such claim;

provided, however, that the Company shall bear and pay directly all costs and
expenses (including additional interest and penalties) incurred in connection
with such contest and shall indemnify and hold the Executive harmless, on an
after-tax basis, for any Excise Tax or income tax (including interest and
penalties with respect thereto) imposed as a result of such representation and
payment of costs and expenses. Without limitation on the foregoing provisions of
this Section 9(c), the Company shall control all proceedings taken in connection
with such contest and, at its sole option, may pursue or forgo any and all
administrative appeals, proceedings, hearings and conferences with the taxing
authority in respect of such claim and may, at its sole option, either pay the
tax claimed and direct the Executive to sue for a refund or contest the claim in
any permissible manner, and the Executive agrees to prosecute such contest to a
determination before any administrative tribunal, in a court of initial
jurisdiction and in one or more appellate courts, as the Company shall
determine; provided, however, that if the Company pays such claim and directs
the Executive to sue for a refund, the Company shall indemnify and hold the
Executive harmless, on an after-tax basis, from any Excise Tax or income tax
(including interest or penalties with respect thereto) imposed with respect to
such payment or with respect to any imputed income with respect to such payment;
and further provided that any extension of the statute of limitations relating
to payment of taxes for the taxable year of the Executive with respect to which
such contested amount is claimed to be due is limited solely to such contested
amount.


                                       23
<PAGE>

Furthermore, the Company's control of the contest shall be limited to issues
with respect to which a Gross-Up Payment would be payable hereunder and the
Executive shall be entitled to settle or contest, as the case may be, any other
issue raised by the Internal Revenue Service or any other taxing authority.


         (d) If, after the payment of any amount by the Company pursuant to
Section 9(c), the Executive becomes entitled to receive any refund with respect
to such claim, the Executive shall (subject to the Company's complying with the
requirements of Section 9(c)) promptly pay to the Company the amount of such
refund (together with any interest paid or credited thereon after taxes
applicable thereto). If, after the payment by the Company of any amount pursuant
to Section 9(c), a determination is made that the Executive shall not be
entitled to any refund with respect to such claim and the Company does not
notify the Executive in writing of its intent to contest such denial of refund
prior to the expiration of 30 days after such determination, then the amount of
such payment shall offset, to the extent thereof, the amount of Gross-Up Payment
required to be paid.

         10. Confidential Information. The Executive shall hold in a fiduciary
capacity for the benefit of the Company all secret or confidential information,
knowledge or data relating to the Company or any of its affiliated companies,
and their respective businesses, which shall have been obtained by the Executive
during the Executive's employment by the Company or any of its affiliated
companies and which shall not be or become public knowledge (other than by acts
by the Executive or representatives of the Executive in violation of this
Agreement). After termination of the Executive's employment with the Company,
the Executive shall not, without the prior written consent of the Company or as
may otherwise be required by law or legal process, communicate or divulge any
such information, knowledge or data to anyone other than the


                                       24
<PAGE>

Company and those designated by it. In no event shall an asserted violation of
the provisions of this Section 10 constitute a basis for deferring or
withholding any amounts otherwise payable to the Executive under this Agreement.


         11. Successors. (a) This Agreement is personal to the Executive and
without the prior written consent of the Company shall not be assignable by the
Executive otherwise than by will or the laws of descent and distribution. This
Agreement shall inure to the benefit of and be enforceable by the Executive's
legal representatives.

         (b) This Agreement shall inure to the benefit of and be binding upon
the Company and its successors and assigns.

         (c) The Company will require any successor (whether direct or indirect,
by purchase, merger, consolidation or otherwise) to all or substantially all of
the business and/or assets of the Company to assume expressly and agree to
perform this Agreement in the same manner and to the same extent that the
Company would be required to perform it if no such succession had taken place.
As used in this Agreement, "Company" shall mean the Company as hereinbefore
defined and any successor to its business and/or assets as aforesaid which
assumes and agrees to perform this Agreement by operation of law, or otherwise.

         12. Miscellaneous. (a) This Agreement shall be governed by and
construed in accordance with the laws of the State of Texas, without reference
to principles of conflict of laws. The captions of this Agreement are not part
of the provisions hereof and shall have no force or effect. This Agreement may
not be amended or modified otherwise than by a written agreement executed by the
parties hereto or their respective successors and legal representatives.


                                       25
<PAGE>

         (b) All notices and other communications hereunder shall be in writing
and shall be given by hand delivery to the other party or by registered or
certified mail, return receipt requested, postage prepaid, addressed, in the
case of the Executive, to the Executive's home address registered with the
Company or, if to the Company, to the attention of the General Counsel at the
Company's home office address or to such other address as either party shall
have furnished to the other in writing in accordance herewith. Notice and
communications shall be effective when actually received by the addressee.

         (c) The invalidity or unenforceability of any provision of this
Agreement shall not affect the validity or enforceability of any other provision
of this Agreement.

         (d) The Company may withhold from any amounts payable under this
Agreement such Federal, state, local or foreign taxes as shall be required to be
withheld pursuant to any applicable law or regulation.

         (e) The Executive's or the Company's failure to insist upon strict
compliance with any provision hereof or any other provision of this Agreement or
the failure to assert any right the Executive or the Company may have hereunder,
including, without limitation, the right of the Executive to terminate
employment for Good Reason pursuant to Section 5(c)(i)-(v) of this Agreement,
shall not be deemed to be a waiver of such provision or right or any other
provision or right of this Agreement.

         (f) The Executive and the Company acknowledge that before the Effective
Date, the Employment Agreement, rather than this Agreement, shall govern the
terms and conditions of the Executive's employment, and if the Executive's
employment terminates before the Effective Date, this Agreement shall
immediately terminate and the Executive shall have no


                                       26
<PAGE>

rights under this Agreement. From and after the Effective Date, this Agreement
shall supersede the Employment Agreement, except to the extent the provisions
thereof are specifically incorporated herein.

         IN WITNESS WHEREOF, the Executive has hereunto set the Executive's hand
and, pursuant to the authorization from its Board of Directors, the Company has
caused this Agreement to be executed in its name on its behalf, all as of the
day and year first above written.






                                            ------------------------------------
                                            James T. Hackett




                                            ANADARKO PETROLEUM CORPORATION




                                            By:
                                               --------------------------------
                                               Richard A Lewis
                                               Vice President, Human Resources













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