Document:

<PAGE>   1

                                                                   EXHIBIT 10.11

                                    Amendment
                                       To
                     Apache Corporation 401(k) Savings Plan

         Apache Corporation ("Apache") maintains the Apache Corporation 401(k)
Savings Plan (the "Plan"). Pursuant to section 10.4 of the Plan, Apache has
retained the right to amend the Plan. Apache hereby exercises that right as
follows.

1.       Effective as of January 1, 2000, the phrase "Code sections 125,
         402(e)(3), 402(h), 403(b), 408(p), or 457" in sections 1.13(a) and
         1.13(b) shall be replaced by the phrase "Code sections 125, 132(f)(4),
         402(e)(3), 402(h), 403(b), 408(p), or 457."

2.       Effective as of September 1, 2000, section 1.13(d)(i)(E) shall be
         replaced in its entirety by the following.

                           (E)      Salary reductions that are excludable from
                                    an Employee's gross income pursuant to Code
                                    section 125 or 132(f)(4), and

3.       Effective as of January 1, 2001, section 1.14(b) shall be replaced in
         its entirety by the following.

                  (b) An Employee shall not be a Covered Employee unless he or
         she is either based in the U.S. or on the U.S. payroll.

4.       Effective as of January 1, 2001, section 1.23 shall be replaced in its
         entirety by the following.

                  1.23 "Highly Compensated Employee" means, for each Plan Year,
         an Employee who (a) was in the "top-paid group" during the immediately
         preceding Plan Year and had Compensation of $80,000 (as adjusted by the
         Secretary of the Treasury) or more during the immediately preceding
         Plan Year, or (b) is a Five-Percent Owner during the current Plan Year,
         or (c) was a Five-Percent Owner during the immediately preceding Plan
         Year. The term "top-paid group" means the top 20% of Employees when
         ranked on the basis of Compensation paid during the year. In
         determining the number of Employees in the top-paid group, the
         Committee may elect to exclude Employees with less than six (or some
         smaller number of) months of service at the end of the year, Employees
         who normally work less than 17 1/2 (or some fewer number of) hours per
         week, Employees who normally work less than six (or some fewer number
         of) months during any year, Employees younger than 21 (or some younger
         age) on the last day of the year, and Employees who are nonresident
         aliens who receive no earned income (within the meaning of Code section
         911(d)(2)) from Apache or an Affiliated Entity that constitutes income
         from sources within the United States (within the meaning of Code
         section 861(a)(3)). Furthermore, an Employee who is a nonresident alien
         who receives no earned income (within the meaning of Code section
         911(d)(2)) from Apache or an Affiliated Entity that constitutes income
         from sources within the United States (within the meaning of Code
         section 861(a)(3)) during the year shall not be in the top-paid group
         for that year.

5.       Effective as of January 1, 2001, the following sentences shall be added
         to the end of section 1.33.

         See the definition of "Employee" for a description of when a leased
         employee (within the meaning of Code section 414(n)) is treated as an
         Employee. In addition, for purposes of calculating an Employee's Period
         of Service once an individual has become an Employee, the individual
         shall be treated as an Employee for any prior period during which the
         individual would have been a leased employee (within the meaning of
         Code section 414(n)) but for the fact that his or her services were not
         on a substantially full-time basis or were for less than a year.

6.       Effective as of July 1, 2001, section 5.1(e) shall be replaced in its
         entirety by the following.

                  (e) Change of Control. The Company Contributions Accounts of
         all Participants shall be fully vested as of the effective date of a
         "change in control." For purposes of this subsection, a "change of

<PAGE>   2

         control" shall mean the event occurring when a person, partnership, or
         corporation, together with all persons, partnerships, or corporations
         acting in concert with each person, partnership, or corporation, or any
         or all of them, acquires more than 20% of Apache's outstanding voting
         securities; provided that a change of control shall not occur if such
         persons, partnerships, or corporations acquiring more than 20% of
         Apache's voting securities is solicited to do so by Apache's board of
         directors, upon its own initiative, and such persons, partnerships, or
         corporations have not previously proposed to acquire more than 20% of
         Apache's voting securities in an unsolicited offer made either to
         Apache's board of directors or directly to the stockholders of Apache.

7.       Effective as of November 1, 2001, Article VI shall be replaced in its
         entirety by the following:

                                   ARTICLE VI
                            DISTRIBUTION OF BENEFITS

         6.1      Beneficiaries.

                  (a) Designating Beneficiaries. Each Account Owner shall file
         with the Committee a designation of the beneficiaries and contingent
         beneficiaries to whom the distributable amount (determined pursuant to
         section 6.2) shall be paid in the event of the Account Owner's death.
         In the absence of an effective beneficiary designation as to any
         portion of the distributable amount after a Participant dies, such
         amount shall be paid to the Participant's surviving Spouse, or, if
         none, to his or her estate. In the absence of an effective beneficiary
         designation as to any portion of the distributable amount after any
         non-Participant Account Owner dies, such amount shall be paid to the
         Account Owner's estate. The Account Owner may change a beneficiary
         designation at any time and without the consent of any previously
         designated beneficiary.

                  (b) Special Rule for Married Participants. If the Account
         Owner is a married Participant, his or her Spouse shall be the sole
         beneficiary unless the Spouse has consented to the designation of a
         different beneficiary. To be effective, the Spouse's consent must be in
         writing, witnessed by a notary public, and filed with the Committee.
         Any spousal consent shall be effective only as to the Spouse who signed
         the consent.

                  (c) Special Rule for Divorces. If an Account Owner has
         designated his or her spouse as a primary or contingent beneficiary,
         and the Account Owner and spouse later divorce (or their marriage is
         annulled), then the former spouse will be treated as having
         pre-deceased the Account Owner for purposes of interpreting a
         beneficiary designation form completed prior to the divorce or
         annulment. This subsection 6.1(c) will apply only if the Committee is
         informed of the divorce or annulment before payment to the former
         spouse is authorized.

                  (d) Disclaimers. Any individual or legal entity who is a
         beneficiary may disclaim all or any portion of his or her interest in
         the Plan, provided that the disclaimer satisfies the requirements of
         Code section 2518(b) and applicable state law. The legal guardian of a
         minor or legally incompetent person may disclaim for such person. The
         personal representative (or the individual or legal entity acting in
         the capacity of the personal representative according to applicable
         state law) may disclaim on behalf of a beneficiary who has died. The
         amount disclaimed shall be distributed as if the disclaimant had
         predeceased the individual whose death caused the disclaimant to become
         a beneficiary.

         6.2      Consent.

                  (a) General. Except for distributions identified in subsection
         (b), distributions may be made only after the appropriate consent has
         been obtained under this subsection. Distributions to a Participant or
         to a beneficiary (other than a beneficiary of a deceased Alternate
         Payee) shall be made only with the Participant's or beneficiary's
         consent to the time of distribution. Distributions to an Alternate
         Payee or his or her beneficiary shall be made as specified in the QDRO
         and in accordance with section 13.9. To be effective,

Page 2 of 8
<PAGE>   3

         the consent must be filed with the Committee according to the
         procedures adopted by the Committee, within 90 days before the
         distribution is to commence. A consent once given shall be irrevocable
         after distribution has been processed.

                  (b) Exceptions to General Rule. Consent is not required for
         the following distributions:

                           (i) Corrective distributions under Article III that
                  are returned to the Participant because the contribution is
                  not deductible by the Company or because the contribution
                  would exceed the limits of Code sections 401(a)(17),
                  415(c)(1), 402(g), 401(k)(3), 401(m)(2), 401(m)(9), or any
                  other limitation of the Code;

                           (ii) Distributions that are required to comply with
                  Code section 401(a)(9);

                           (iii) Immediate cashouts of less than $5,000, as
                  described in subsection 6.5(d) or paragraphs 6.5(e)(i) or
                  13.9(f)(ii);

                           (iv) Distributions pursuant to Code section
                  401(a)(14);

                           (v) Distributions of invalid rollovers pursuant to
                  subsection 3.2(b); and

                           (vi) Distributions that must occur by a deadline
                  specified in the Plan.

         6.3      Distributable Amount.

                  The distributable amount of an Account Owner's Account(s) is
         the vested portion of the Account(s) (as determined by Article V) as of
         the Valuation Date coincident with or next preceding the date
         distribution is made, reduced by (a) any amount that is payable to an
         Alternate Payee pursuant to section 13.9, (b) any amount withdrawn
         pursuant to section 7.1 since such Valuation Date, and (c) the
         outstanding balance of any loan under section 7.2. Furthermore, the
         Committee shall temporarily suspend or limit distributions (by reducing
         the distributable amount), as explained in section 13.9, when the
         Committee is informed that a Domestic Relations Order affecting the
         Participant's Accounts is or may be in the process of becoming QDRO.
         The distributable amount shall also be zero (except to the extent
         necessary to comply with Code section 401(a)(9)) while the Committee
         has suspended withdrawals because it believes that the Plan may have a
         cause of action against the Participant, as explained in subsection
         13.9(h).

         6.4      Manner of Distribution.

                  (a) General. The distributable amount shall be paid in a
         single payment, except as otherwise provided in the remainder of this
         section. Distributions shall be in the form of cash except to the
         extent that an Account is invested in a fund containing primarily
         Company Stock, the distributee may elect to receive a distribution of
         whole shares of Company Stock. Fractional shares of Company Stock shall
         be converted to and paid in cash.

                  (b) Partial Withdrawals and Installments. Withdrawals are
         available to Employees as specified in section 7.1 and to those
         Employees over 70 1/2 who are Five-Percent Owners, as described in
         paragraph 6.5(c)(ii). Annual installments are available to
         beneficiaries as described in subsection 6.5(e).

                  (c) Grandfather Rules. Installments were a distribution option
         under the Plan until June 30, 2001. Annuities were a distribution
         option for some amounts that were transferred to this Plan before June
         30, 2001. Any Account Owner who could receive a distribution before
         July 1, 2001 and who elected before July 1, 2001 to receive the
         distribution in the form of installments or an annuity shall receive
         the benefit so elected. An Account Owner who elected installments may
         elect to accelerate any or all remaining installment payments.

Page 3 of 8
<PAGE>   4

         6.5      Time of Distribution.

                  (a) Earliest Date of Distribution. Unless an earlier
         distribution is permitted by subsection (b) or required by subsection
         (c), the earliest date that a Participant may elect to receive a
         distribution is as follows.

                           (i) Termination of Employment or Disability. A
                  Participant may elect to receive a distribution as soon as
                  practicable after he or she terminates employment or incurs a
                  Disability. However, distribution from a Participant
                  Before-Tax Contribution Account shall not occur pursuant to
                  this paragraph unless (A) the Participant has separated from
                  service within the meaning of Code section 401(k)(2)(B)(i)(I),
                  (B) the Participant has incurred a Disability, (C) the
                  Participant has attained age 59 1/2, or (D) the Participant
                  has been affected by a corporate transaction described in Code
                  section 401(k)(10)(A)(ii) or Code section 401(k)(10)(A)(iii).

                           (ii) During Employment. A Participant may not obtain
                  a distribution while employed by the Company or an Affiliated
                  Entity, except as provided in section 7.1 (relating to
                  in-service withdrawals) and except as provided in paragraph
                  6.5(c)(ii) (relating to the minimum distributions required on
                  and after a Five-Percent Owner's Required Beginning Date).

                  (b) Compliance With Code Section 401(a)(14). Notwithstanding
         subsection (a), unless a Participant elects otherwise, his or her
         distribution shall commence no later than 60 days after the close of
         the latest of: (i) the Plan Year in which the Participant attains
         Normal Retirement Age; (ii) the Plan Year in which occurs the tenth
         anniversary of the year in which the Participant commenced
         participation in the Plan; and (iii) the Plan Year in which the
         Participant terminates employment with the Company and Affiliated
         Entities. If a Participant does not affirmatively elect a distribution,
         he or she shall be deemed to have elected to defer the distribution to
         a date later than that specified in the preceding sentence.

                  (c) Latest Date of Distribution.

                           (i) Former Employees. A Participant who is not an
                  Employee shall receive a single payment of his distributable
                  amount by his Required Beginning Date. If a Five-Percent Owner
                  terminates employment after his or her Required Beginning
                  Date, the Plan shall distribute the entire distributable
                  amount to him or her as soon as administratively practicable
                  after the termination of employment.

                           (ii) Current Employees. An Employee who is not a
                  Five-Percent Owner is not required to receive any
                  distributions under this subsection. An Employee who is a
                  Five-Percent Owner shall receive annual distributions of at
                  least the minimum amount required to be distributed pursuant
                  to Code section 401(a)(9). A Five-Percent Owner may request
                  that his or her first minimum required distribution be
                  distributed in the calendar year preceding his or her Required
                  Beginning Date; the Committee shall comply with this request
                  if administrating practicable to do so.

                  (d) Small Amounts. If the aggregate value of the
         nonforfeitable portion of a Participant's Accounts is $5,000 or less on
         any date after the Participant terminates employment, the Participant
         shall receive a single payment of the distributable amount as soon as
         practicable, provided that the aggregate value is $5,000 or less when
         the distribution is processed. The Committee may elect to check the
         value of the Participant's Accounts on an occasional (rather than a
         daily) basis, to determine whether to apply the provisions of this
         subsection.

Page 4 of 8
<PAGE>   5

                  (e) Distribution Upon Participant's Death.

                           (i) Small Accounts. If the aggregate cash value of
                  the nonforfeitable portion of a Participant's Accounts is
                  $5,000 or less at any time after the Participant's death and
                  before any beneficiary elects to receive a distribution under
                  this subsection, then the beneficiary or beneficiaries shall
                  each receive a single payment of their share of each one's
                  distributable amount as soon as administratively practicable,
                  provided that the aggregate value is $5,000 or less when the
                  distribution is processed. The Committee may elect to check
                  the value of the Participant's Accounts on an occasional
                  (rather than a daily) basis, to determine whether to apply the
                  provisions of this paragraph.

                           (ii) Larger Accounts. If paragraph (i) does not
                  apply, then each beneficiary may elect to have his or her
                  distributable amount distributed in a single payment or in
                  annual installments at any time after the Participant's death,
                  within the following guidelines. No distribution shall be
                  processed until the beneficiary's identity as a beneficiary is
                  established. The entire distributable amount shall be
                  distributed by the last day of the calendar year containing
                  the fifth anniversary of the Participant's death. A
                  beneficiary who has elected installments may elect to
                  accelerate any or all remaining payments. If the Participant
                  was a Five-Percent Owner who began to receive the minimum
                  required distributions under paragraph (c)(ii), the
                  distribution to each beneficiary must be made at least as
                  rapidly as required by the method used to calculate the
                  minimum required distributions that was in effect when the
                  Five-Percent Owner died.

                  (f) Alternate Payee. Distributions to an Alternate Payee shall
         be made in accordance with the provisions of the QDRO and pursuant to
         subsection 13.9.

                  (g) 242(b) Elections. Notwithstanding the foregoing,
         distribution of a Participant's Account(s), including the Account(s) of
         a Participant who is a Key Employee in a top-heavy plan, may be made in
         accordance with all of the following rules (regardless of when such
         distribution commences):

                           (i) The distribution must be one that would not have
                  disqualified the Plan under Code section 401(a)(9) prior to
                  its amendment by the Tax Equity and Fiscal Responsibility Act
                  of 1982.

                           (ii) The distribution must be in accordance with a
                  method of distribution designated by the Participant whose
                  interest in the Plan is being distributed, or if the
                  Participant is deceased, by the designated beneficiary of such
                  Participant.

                           (iii) The designation must have been in writing,
                  signed by the Participant or designated beneficiary, and made
                  before January 1, 1984.

                           (iv) The Participant must have accrued a benefit
                  under the Plan as of December 31, 1983.

         6.6      Direct Rollover Election.

                  (a) General Rule. A Participant, an Alternate Payee who is the
         Spouse or former Spouse of the Participant, or a surviving Spouse of a
         deceased Participant (collectively, the "distributee") may direct the
         Trustee to pay all or any portion of his "eligible rollover
         distribution" to an "eligible retirement plan" in a "direct rollover."
         This direct rollover option is not available to other Account Owners
         (i.e., non-Spouse beneficiaries and Alternate Payees who are not the
         Spouse or former Spouse of the Participant). Within a reasonable period
         of time before an eligible rollover distribution, the Committee shall
         inform the distributee of this direct rollover option, the appropriate
         withholding rules, other rollover options, the options regarding income
         taxation, and any other information required by Code section 402(f).

Page 5 of 8
<PAGE>   6

                  (b) Definition of Eligible Rollover Distribution. For purposes
         of this section only, an "eligible rollover distribution" is any
         distribution or in-service withdrawal other than (i) distributions
         required under Code section 401(a)(9), (ii) distributions of amounts
         that have already been subject to federal income tax (such as defaulted
         loans or after-tax voluntary contributions, (iii) installment payments
         in a series of substantially equal payments made at least annually and
         (A) made over a specified period of ten or more years, (B) made for the
         life or life expectancy of the distributee, or (C) made for the joint
         life or joint life expectancy of the distributee and his designated
         beneficiary, (iv) a distribution to satisfy the limits of Code section
         415 or 402(g), (v) a distribution to satisfy the ADP, ACP, or multiple
         use tests, (vi) any other actual or deemed distribution specified in
         the regulations issued under Code section 402(c), or (vii) any hardship
         withdrawal by an Employee under age 59 1/2 pursuant to subsection
         7.1(c).

                  (c) Definition of Eligible Retirement Plan. For purposes of
         this section only, (i) for a Participant or an Alternate Payee who is
         the Spouse or former Spouse of the Participant, an "eligible retirement
         plan" is an individual retirement account or annuity described in Code
         section 408(a) or 408(b), an annuity plan described in Code section
         403(a), or the qualified trust of a defined contribution plan that
         accepts eligible rollover distributions, and (ii) for a surviving
         Spouse of a deceased Participant, an "eligible retirement plan" is an
         individual retirement account or annuity.

                  (d) Definition of Direct Rollover. For purposes of this
         section only, a "direct rollover" is a payment by the Trustee to the
         eligible retirement plan specified by the distributee.

8.       Effective as of November 1, 2001, Section 13.9(f) shall be replaced in
         its entirety by the following:

                  (f) The Alternate Payee shall have the following rights under
         the Plan:

                           (i) Single Payment. The only form of payment
                  available to an Alternate Payee is a single payment of the
                  distributable amount (measured at the time the payment is
                  processed). If the Alternate Payee is awarded more than the
                  distributable amount, the Alternate Payee shall initially
                  receive a distribution of the distributable amount, with
                  additional payments made as soon as administratively
                  convenient after more of the amount awarded to the Alternate
                  Payee becomes distributable.

                           (ii) Timing of Distribution. Subject to the limits
                  imposed by this paragraph, the Alternate Payee may choose (or
                  the QDRO may specify) the date of the distribution. If the
                  value of the nonforfeitable portion of an Alternate Payee's
                  Account is $5,000 or less, the Alternate Payee shall receive a
                  distribution as soon as practicable, provided that the value
                  is $5,000 or less when the distribution is processed.
                  Otherwise, the distribution to the Alternate Payee may occur
                  at any time after the Committee determines that the Domestic
                  Relations Order is a QDRO and before the Participant's
                  Required Beginning Date (unless the order is determined to be
                  a QDRO after the Participant's Required Beginning Date, in
                  which case the distribution to the Alternate Payee shall be
                  made as soon as administratively practicable after the order
                  is determined to be a QDRO).

                           (iii) Death of Alternate Payee. The Alternate Payee
                  may designate one or more beneficiaries, as specified in
                  section 6.1. When the Alternate Payee dies, the Alternate
                  Payee's beneficiary shall receive a complete distribution of
                  the distributable amount in a single payment as soon as
                  administratively convenient.

                           (iv) Investing. An Alternate Payee may direct the
                  investment of his Account pursuant to section 9.3.

                           (v) Claims. The Alternate Payee may bring claims
                  against the Plan pursuant to section 13.2.

Page 6 of 8
<PAGE>   7

9.       Effective as of April 1, 2000, the last sentence of section 7.2(e)
         shall be replaced in its entirety by the following:

         Partial pre-payments are accepted.

10.      Effective as of November 1, 2001, Appendix B shall be replaced in its
         entirety by the following:

                                   APPENDIX B

                       HADSON ENERGY RESOURCES CORPORATION

                                  Introduction

                  Apache acquired Hadson Energy Resources Corporation ("HERC")
         as of November 12, 1993. HERC and its wholly owned subsidiary, Hadson
         Energy Limited ("HEL"), maintained the Hadson Energy Resources
         Corporation Employee 401(k) Plan (the "HERC Plan"), a profit sharing
         plan containing a cash or deferred arrangement. The HERC Plan was
         terminated as of December 31, 1993, and amounts were transferred from
         the HERC Plan to this Plan.

                  The transferred amounts that are subject to the distribution
         restrictions of Code section 401(k) shall be placed in the Participant
         Before-Tax Contributions Accounts. Any remaining transferred amounts
         that represent after-tax contributions, rollovers, or the associated
         investment earnings shall be placed in the Rollover Account. All
         remaining transferred amounts shall be placed in the Company
         Contributions Account.

                             -- END OF APPENDIX B --

11.      Effective as of August 1, 2000, Appendices C, E, G, I, J and K shall be
         deleted, the following Appendix C shall be added to the Plan, and
         current Appendices F and H shall be re-numbered as Appendices E and F:

                                   APPENDIX C

                  Over the years, Apache and its Affiliated Entities have
         engaged in numerous corporate transactions, both acquisitions and
         sales. This Appendix contains any special service-crediting provisions
         that apply to employees affected by the corporate transaction (both
         those who become Employees and those whose employment is terminated).

                                      SALES

                  The following Participants are fully vested in their Accounts
         in this Plan, on the following dates:

         o        Employees terminated in connection with the summer 1995 sale
                  of certain properties to Citation 1994 Investment Limited
                  Partnership are fully vested in their Plan Accounts as of
                  September 1, 1995.

                                  ACQUISITIONS

                  A Period of Service for vesting purposes for a New Employee
         (listed below) shall be determined by treating all periods of
         employment with the Former Employer Controlled Group as periods of
         employment with Apache. The "Former Employer Controlled Group" means
         the Former Employer (listed below), its predecessor company/ies, and
         any business while such business was treated as a single employer with
         the Former Employer or predecessor company pursuant to Code section
         414(b), 414(c), 414(m), or 414(o).

Page 7 of 8
<PAGE>   8

                  The following individuals are "New Employees" and the
following companies are "Former Employers":

<Table>
<Caption>
                          Former Employer                                             New Employees
                          ---------------                                             -------------

<S>                                                                        <C>
         Hadson Energy Resources Corporation ("HERC") and                   All individuals employed by HERC or HEL on
         Hadson Energy Limited ("HEL")                                      November 12, 1993.

         Crystal Oil Company ("Crystal")                                    All individuals hired from Crystal or related
                                                                            companies within a week of the closing date on
                                                                            an asset purchase that was originally
                                                                            scheduled to close on December 31, 1994.

         Texaco Exploration & Production, Inc.                              All individuals hired from TEPI or Inc.
                                                                            ("TEPI") related companies in late February
                                                                            and early March 1995 in connection with an
                                                                            acquisition of assets from TEPI.

         The Phoenix Resource Companies, Inc. ("Phoenix")                   All individuals hired by Apache in 1996 who
                                                                            were Phoenix employees on May 20, 1996.

         Crescendo Resources, L.P. ("Crescendo")                            All individuals hired from April 30, 2000
                                                                            through June 1, 2000 from Crescendo and
                                                                            related companies in connection with an April
                                                                            30, 2000 asset acquisition from Crescendo.

         Collins & Ware ("C&W") and Longhorn Disposal,                      All individuals hired from C&W and Longhorn
         Inc. ("Longhorn")                                                  and related companies in connection with a May
                                                                            23, 2000 asset acquisition from C&W and
                                                                            Longhorn.

         Occidental Petroleum Corporation ("Oxy")                           All individuals hired from Oxy and related
                                                                            companies in connection with an August 2000
                                                                            asset acquisition from an Oxy subsidiary.
</Table>

                             -- END OF APPENDIX C -

                     IN WITNESS WHEREOF, this Amendment has been executed the
date set forth below.

                                        APACHE CORPORATION

                                        By: /s/ Jeffrey M. Bender
                                            ------------------------------------

Date: August 3, 2001                    Title: Vice President - Human Resources
      --------------                           ---------------------------------

Page 8 of 8<PAGE>   1

                                                                   EXHIBIT 10.12

                                    Amendment
                                       To
                Apache Corporation Money Purchase Retirement Plan

         Apache Corporation ("Apache") maintains the Apache Corporation Money
Purchase Retirement Plan (the "Plan"). In section 9.4 of the Plan, Apache
reserved the right to amend the Plan from time to time. Apache hereby exercises
that right as follows.

1.       Effective as of January 1, 2000, the phrase "Code sections 125,
         402(e)(3), 402(h), 403(b), 408(p), or 457" in sections 1.11(a) and
         1.11(b) shall be replaced by the phrase "Code sections 125, 132(f)(4),
         402(e)(3), 402(h), 403(b), 408(p), or 457."

2.       Effective as of September 1, 2000, section 1.11(c)(i)(E) shall be
         replaced in its entirety by the following.

                           (E)      Salary reductions that are excludable from
                                    an Employee's gross income pursuant to Code
                                    section 125 or 132(f)(4), and

3.       Effective as of January 1, 2001, section 1.12(b) shall be replaced in
         its entirety by the following.

                  (b) An Employee shall not be a Covered Employee unless he or
         she is either based in the U.S. or on the U.S. payroll.

4.       Effective as of January 1, 2001, section 1.20 shall be replaced in its
         entirety by the following.

                  1.20 "Highly Compensated Employee" means, for each Plan Year,
         an Employee who (a) was in the "top-paid group" during the immediately
         preceding Plan Year and had Compensation of $80,000 (as adjusted by the
         Secretary of the Treasury) or more during the immediately preceding
         Plan Year, or (b) is a Five-Percent Owner during the current Plan Year,
         or (c) was a Five-Percent Owner during the immediately preceding Plan
         Year. The term "top-paid group" means the top 20% of Employees when
         ranked on the basis of Compensation paid during the year. In
         determining the number of Employees in the top-paid group, the
         Committee may elect to exclude Employees with less than six (or some
         smaller number of) months of service at the end of the year, Employees
         who normally work less than 17 1/2 (or some fewer number of) hours per
         week, Employees who normally work less than six (or some fewer number
         of) months during any year, Employees younger than 21 (or some younger
         age) on the last day of the year, and Employees who are nonresident
         aliens who receive no earned income (within the meaning of Code section
         911(d)(2)) from Apache or an Affiliated Entity that constitutes income
         from sources within the United States, within the meaning of Code
         section 861(a)(3). Furthermore, an Employee who is a nonresident alien
         who receives no earned income (within the meaning of Code section
         911(d)(2)) from Apache or an Affiliated Entity that constitutes income
         from sources within the United States (within the meaning of Code
         section 861(a)(3)) during the year shall not be in the top-paid group
         for that year.

5.       Effective as of January 1, 2001, section 1.29(d) shall be replaced in
         its entirety by the following.

                  (d) Leased Employee Rules. See the definition of "Employee"
         for a description of when a leased employee (within the meaning of Code
         section 414(n)) is treated as an Employee. In addition, for purposes of
         calculating an Employee's Period of Service once an individual has
         become an Employee, the individual shall be treated as an Employee for
         any prior period during which the individual would have been a leased
         employee (within the meaning of Code section 414(n)) but for the fact
         that his or her services were not on a substantially full-time basis or
         were for less than a year.

6.       Effective as of January 1, 2001, the following section 3.1(a)(vi) shall
         be added to the Plan.

                            (vi) Special Allocation for 2000. In addition to the
                  allocation provided in paragraph (ii), the eligible
                  Participants who had the smallest "plan year compensation" (as
                  defined below) in 2000 shall receive an additional allocation
                  of Company Mandatory Contributions equal to 1.83% of the
                  eligible Participant's plan year compensation in 2000. For
                  purposes of this paragraph only, "plan year compensation"
                  means those amounts

<PAGE>   2

                  reported as "wages, tips, other compensation" on Form W-2 by
                  the Company or an Affiliated Entity and elective contributions
                  that are not includable in the Employee's income pursuant to
                  Code section 125, 132(f)(4), or 402(e)(3).

7.       Effective as of July 1, 2001, section 5.1(c) shall be replaced in its
         entirety by the following.

                  (c) Change of Control. The Accounts of all Participants shall
         be fully vested as of the effective date of a "change in control." For
         purposes of this subsection, a "change of control" shall mean the event
         occurring when a person, partnership, or corporation, together with all
         persons, partnerships, or corporations acting in concert with each
         person, partnership, or corporation, or any or all of them, acquires
         more than 20% of Apache's outstanding voting securities; provided that
         a change of control shall not occur if such persons, partnerships, or
         corporations acquiring more than 20% of Apache's voting securities is
         solicited to do so by Apache's board of directors, upon its own
         initiative, and such persons, partnerships, or corporations have not
         previously proposed to acquire more than 20% of Apache's voting
         securities in an unsolicited offer made either to Apache's board of
         directors or directly to the stockholders of Apache.

8.       Effective November 1, 2001 section 6.3(b) shall be replaced in its
         entirety by the following.

                  (b) Beneficiaries. The distributable amount that is left to a
         beneficiary shall be paid, at the election of the beneficiary, in the
         form of a single payment, installments (for non-Spouse beneficiaries),
         or an annuity (for Spouse beneficiaries), as described in subsection
         6.4(e).

9.       Effective as of November 1, 2001, sections 6.4(c), 6.4(d), and 6.4(e)
         shall be replaced in their entirety by the following.

                  (c) Latest Date of Distribution. The entire distributable
         amount shall be distributed to a Participant (i) in a single payment
         not later than the Required Beginning Date, or (ii) in the form of an
         annuity with payments beginning no later than the Required Beginning
         Date. The terms of the annuity shall comply with the applicable
         Treasury Regulations. The payment will be in the form of an annuity
         unless the Participant elects a single payment and, if the Participant
         is married, his or her Spouse consents to the single payment.

                  (d) Small Amounts. If the value of the nonforfeitable portion
         of a Participant's Account is $5,000 or less at any time after the
         Participant's termination of employment, then the Participant shall
         receive a single payment of the distributable amount as soon as
         administratively practicable, provided that the value is $5,000 or less
         when the distribution is processed. The Committee may elect to check
         the value of the Participant's Accounts on an occasional (rather than a
         daily) basis, to determine whether to apply the provisions of this
         subsection.

                  (e) Distribution Upon Participant's Death.

                           (i) Small Accounts. If the value of the
                  nonforfeitable portion of a Participant's Account is $5,000 or
                  less at any time after the Participant's death and before any
                  beneficiary elects to receive a distribution under this
                  subsection, then the beneficiary or beneficiaries shall each
                  receive a single payment of each one's distributable amount as
                  soon as administratively practicable, provided that the
                  aggregate value is $5,000 or less when the distribution is
                  processed. The Committee may elect to check the value of the
                  Participants' Accounts on an occasional (rather than a daily)
                  basis to determine whether to apply the provisions of this
                  subsection.

                           (ii) Larger Accounts. If paragraph (i) does not
                  apply, then each beneficiary may elect to have his or her
                  distributable amount distributed at any time after the
                  Participant's death, within the following guidelines. The
                  forms of permitted distribution are a lump sum, annual
                  installments, and for Spouse beneficiaries only, a QPSA. No
                  distribution shall be processed until the beneficiary's
                  identity as a beneficiary is established. The entire
                  distributable amount shall be distributed by the last day of
                  the calendar year containing the fifth anniversary of the
                  Participant's death; if a Spouse

Page 2 of 4
<PAGE>   3

                  beneficiary elects a QPSA, the annuity contract shall be
                  distributed by the last day of the calendar year containing
                  the fifth anniversary of the Participant's death. A
                  beneficiary who elects installments may elect to accelerate
                  any or all remaining payments. In addition, if the Participant
                  was a Five-Percent Owner who began to receive the minimum
                  required distributions under paragraph (c)(ii), the
                  distribution to each beneficiary must be made at least as
                  rapidly as required by the method used to calculate the
                  minimum required distributions that was in effect when the
                  Five-Percent Owner died.

10.      Effective as of November 1, 2001, Section 12.9(f) shall be replaced in
         its entirety by the following:

         (f) The Alternate Payee shall have the following rights under the Plan:

                           (i) Small Accounts. If the value of the
                  nonforfeitable portion of an Alternate Payee's Account is
                  $5,000 or less, the Alternate Payee shall receive a single
                  payment of the distributable amount as soon as practicable,
                  provided that the value is $5,000 or less when the
                  distribution is processed. The Committee may elect to check
                  the value of the Alternate Payee's Account on an occasional
                  (rather than a daily) basis, to determine whether this
                  paragraph applies.

                           (ii) Single Payment or Annuity. This paragraph
                  applies only if paragraph (i) does not apply. The only form of
                  payment available to an Alternate Payee who is not the Spouse
                  or former Spouse of the Participant is a single payment of the
                  distributable amount (measured at the time the payment is
                  processed). An Alternate Payee who is the Spouse or former
                  Spouse of the Participant may choose between a single payment
                  of the distributable amount or an annuity. If the Alternate
                  Payee is awarded more than the distributable amount, the
                  Alternate Payee shall initially receive a distribution of the
                  distributable amount, with additional distributions made as
                  soon as administratively convenient after more of the amount
                  awarded to the Alternate Payee becomes distributable.

                           (iii) Timing of Distribution. This paragraph applies
                  only if paragraph (i) does not apply. Subject to the limits
                  imposed by this paragraph, the Alternate Payee may choose (or
                  the QDRO may specify) the date of the distribution. The
                  distribution to the Alternate Payee may occur at any time
                  after the Committee determines that the Domestic Relations
                  Order is a QDRO and before the Participant's Required
                  Beginning Date (unless the order is determined to be a QDRO
                  after the Participant's Required Beginning Date, in which case
                  the distribution to the Alternate Payee shall be made as soon
                  as administratively practicable after the order is determined
                  to be a QDRO).

                           (iv) Death of Alternate Payee. The Alternate Payee
                  may designate one or more beneficiaries, as specified in
                  section 6.1. When the Alternate Payee dies, the Alternate
                  Payee's beneficiary shall receive a complete distribution of
                  the distributable amount in a single payment as soon as
                  administratively convenient.

                           (v) Investing. An Alternate Payee may direct the
                  investment of his Account pursuant to section 8.3.

                           (vi) Claims. The Alternate Payee may bring claims
                  against the Plan pursuant to section 12.2.

11.      Effective as of August 1, 2000, Appendix C shall be replaced in its
         entirety by the following and Appendix D shall be deleted:

                                   APPENDIX C

                  Over the years, the Company has engaged in numerous corporate
         transactions, both acquisitions and sales. This Appendix contains any
         special service-crediting provisions that apply to employees affected
         by

Page 3 of 4
<PAGE>   4

         the corporate transaction (both those who are hired by the Company and
         those whose employment is terminated).

                                      SALES

                  The following Participants are fully vested in their Accounts
         in this Plan, on the following dates:

                  [none, as of July 1, 2001]

                                  ACQUISITIONS

                  A Period of Service for vesting purposes for a New Employee
         (listed below) shall be determined by treating all periods of
         employment with the Former Employer Controlled Group as periods of
         employment with Apache. The "Former Employer Controlled Group" means
         the Former Employer (listed below), its predecessor company/ies, and
         any business while such business was treated as a single employer with
         the Former Employer or predecessor company pursuant to Code section
         414(b), 414(c), 414(m), or 414(o).

                  The following individuals are "New Employees" and the
         following companies are "Former Employers":

<Table>
<Caption>
                       Former Employer                                                  New Employees
                       ---------------                                                  -------------

<S>                                                                        <C>
         Crescendo Resources, L.P. ("Crescendo")                           All individuals hired from April 30, 2000
                                                                           through June 1, 2000 from Crescendo and related
                                                                           companies in connection with an April 30, 2000
                                                                           asset acquisition from Crescendo.

         Collins & Ware ("C&W") and Longhorn Disposal,                     All individuals hired from C&W, Longhorn, and
         Inc. ("Longhorn")                                                 related companies in connection with a May 23,
                                                                           2000 asset acquisition from C&W and Longhorn.

         Occidental Petroleum Corporation ("Oxy")                          All individuals hired from Oxy and related
                                                                           companies in connection with an August 2000
                                                                           asset acquisition from an Oxy subsidiary.
</Table>

                             -- END OF APPENDIX C --

                  IN WITNESS WHEREOF, this Amendment has been executed the date
set forth below.

                                        APACHE CORPORATION

                                        By: /s/ Jeffrey M. Bender
                                            ------------------------------------

Date: August 3, 2001                    Title: Vice President - Human Resources
      --------------                           ---------------------------------

Page 4 of 4

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}]]