EXHIBIT 10.31

EXECUTIVE EMPLOYMENT AGREEMENT

AGREEMENT by and between POGO PRODUCING COMPANY, a Delaware corporation (the "Company") and Michael J. Killelea (the "Executive"), dated as of the 1st 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, and to provide the Executive with compensation and benefits arrangements which are competitive with those of other corporations and which ensure that the
compensation and benefits expectations of the Executive will be satisfied. The Board also 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 insure the continuation of favorable compensation and benefits upon a Change of Control. 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 date of this Agreement.

(b)   The
"Employment Period" shall mean the period commencing on the Effective Date and ending on the second anniversary of such date; provided, however, that on each annual
anniversary of the Effective Date (the "Renewal Date"), the Employment Period shall be reviewed, to determine whether, in the discretion of the Company, it should be extended for one additional year
so as to terminate two years from such Renewal Date. Any such one-year extension shall be effective only if, prior to the Renewal Date, the Company shall give notice to the Executive that
the Employment Period shall be so extended.

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



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3.Employment Agreement.The Company hereby agrees to continue the Executive in its employ in accordance with
the terms and provisions of this Agreement, for 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 at any time during the 90-day period immediately
preceding the Applicable Date and (B) the Executive's services shall be performed at the location where the Executive was employed immediately preceding the Applicable Date or any office which
is the headquarters of the Company and is less than 25 miles from such location. For purposes of this Agreement, "Applicable Date" shall mean, at any time of determination, the latest to have occurred
of the Effective Date, the most recent Renewal Date, or any date on which a Change of Control has occurred.



(b)Compensation.(i)Base Salary.During the Employment
Period, the Executive shall receive an annual base salary ("Annual Base Salary"), which shall be paid on a monthly basis, at least equal to twelve times the highest monthly base salary paid or payable
to the Executive by the Company and its affiliated companies in respect of the twelve-month period immediately preceding the month in which the Applicable Date occurs. During the Employment Period,
the Annual Base Salary shall be reviewed

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at
least annually and may be increased at any time and from time to time as shall be substantially consistent with increases in base salary generally awarded in the ordinary course of business to
other executives of the Company and its affiliated companies. Any increase in Annual Base Salary shall not serve to limit or reduce any other obligation to the Executive under this Agreement. As used
in this Agreement, the term "affiliated companies" shall include any company controlled by, controlling or under common control with the Company.



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

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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(c) 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 (such agreement as to acceptability not to be withheld unreasonably).

(b)Cause.The Company may terminate the Executive's employment during the Employment Period for Cause. For
purposes of this Agreement, "Cause" shall mean (i) a material violation by the Executive of the Executive's obligations under Section 4(a) of this Agreement (other than as a result of
incapacity due to physical or mental illness) which is willful and deliberate on the Executive's part, which is committed in bad faith or without reasonable belief that such violation is in the best
interests of the Company and which is not remedied in a reasonable period of time after receipt of written notice from the Company specifying such violation or (ii) the final and
non-appealable conviction by a court of competent jurisdiction of the Executive of a felony involving moral turpitude.

(c)Good Reason; Window Period; Other Terminations.The Executive's employment may be terminated
(i) during the Employment Period by the Executive for Good Reason, (ii) during the Window Period by the Executive without any reason or (iii) by Executive other than
(A) for Good Reason or (B) during a Window Period.

For
purposes of this Agreement, the "Window Period" shall mean the 180-day period immediately following the date a Change of Control occurs. The Company shall inform the
Executive promptly following the occurrence of a Change of Control of the date on which the Change of Control occurred, with such supporting detail as may be necessary to establish such date. If, in
the reasonable judgment of Executive, there exists uncertainty as to the date on which a Change of Control occurred and in the absence of agreement between the Company and the Executive as to such
date, the Executive shall be entitled, for purposes of determining the Window Period, to treat the Change of Control as having occurred on such date as the Executive reasonably determines, it being
the intention of the parties that Executive not be deprived of substantive rights hereunder by reason of uncertainties or disputes regarding the date on which a Change of Control occurred. 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 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 or cessation of status as an officer
(i) was at the request of a third party who has taken steps reasonably calculated to effect the Change of Control or (ii) otherwise arose in connection with or anticipation of the Change
of Control, then for all purposes of this Agreement the "date a Change of Control occurs" shall mean the date immediately prior to the date of such termination of employment or cessation of status as
an officer.

For
purposes of this Agreement, "Good Reason" shall mean



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(d)Notice of Termination.Any termination by the Company for Cause, or by the Executive without any reason
during the Window Period or for Good Reason, shall be communicated by Notice of Termination to the other party hereto given in accordance with Section 12(c) 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 fifteen 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 hereunder or
preclude the Executive or the Company from asserting such fact or circumstance in enforcing the Executive's or the Company's right hereunder.

(e)Date of Termination."Date of Termination" means (i) if the Executive's employment is terminated by
the Company for Cause, or by the Executive during the Window Period or 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 of Termination shall be the date on which the Company notifies the Executive of such
termination, (iii) if the Executive's employment is terminated by reason of death or Disability, the Date of Termination shall be the date of death of the Executive or the Disability Effective
Date, as the case may be, and (iv) if the Executive's employment is terminated by the Executive other than for Good Reason or during a Window Period, the date of the receipt of the Notice of
Termination or any later date specified therein.

6.Obligations of the Company upon Termination.

(a)Good Reason or during the Window Period; Other than for Cause, Death or Disability.If, during the Employment Period, the
Company shall terminate the Executive's employment other than for Cause or Disability or the Executive shall terminate employment either for Good Reason or without any reason during the Window Period:



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(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 (i) payment of Accrued Obligations (which shall
be paid to the Executive's estate or beneficiary, as applicable, in a lump-sum in cash within 30 days of the Date of Termination) and the timely payment or provision of the Welfare
Benefit Continuation and Other Benefits, and (ii) payment to the Executive's estate or beneficiary, as applicable, in a lump-sum in cash within 30 days of the Date of
Termination of an amount equal to the sum of the Severance Amount and the Supplemental Retirement Amount.

(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 (i) payment of Accrued Obligations (which shall be paid to the Executive in a
lump-sum in cash within 30 days of the Date of Termination) and the timely payment or provision of the Welfare Benefit Continuation and Other Benefits (excluding, in each case,
Disability Benefits (as defined below)), and (ii) payment to the Executive in a lump-sum in cash within 30 days of the Date of Termination of an amount equal to the greater
of (A) the sum of the Severance Amount and the Supplemental Retirement Amount and (B) the present value (determined as provided in Section 280G(d)(4) of the Code) of any cash
amount to be received by the Executive as a disability benefit pursuant to the terms of any long term disability plan, policy or arrangement of the Company and its affiliated companies, but not
including any proceeds of disability insurance covering the Executive to the extent paid for on a contributory basis by the Executive (which shall be paid in any event as an Other Benefit) (the
benefits included in this clause (B) shall be hereinafter referred to as the "Disability Benefits").

(d)Cause; By Executive Other than for Good Reason And Other Than During a Window Period.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
Annual Base Salary through the Date of Termination plus the amount of any compensation previously deferred by the Executive, in each case to the extent theretofore unpaid. If the Executive terminates
employment during the Employment Period, excluding a termination either for Good Reason or without any reason during the Window Period, this Agreement shall terminate without further obligations to
the Executive, other than for Accrued Obligations, 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 30 days of the Date of Termination.

7.Non-exclusivity of Rights.Except as provided in Section 6(a)(ii), 6(b) and 6(c) of this
Agreement, 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 shall anything herein limit or otherwise affect

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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 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.

8.Full Settlement; Resolution of Disputes.(a) The Company's obligation to make 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 provided in Section 6(a)(ii) of this Agreement, such amounts shall not be reduced whether or not the Executive obtains other
employment. If there is any contest by the Company concerning the Payments or benefits to be
provided to the Executive hereunder whether through litigation, arbitration or mediation, or with respect to the validity or enforceability of, or liability under, any provision of this Agreement or
any guarantee of performance thereof, and the Executive is the prevailing party, the Company agrees to pay promptly upon conclusion of the contest all legal fees and expenses which the Executive may
reasonably have incurred.

(b)   If
there shall be any dispute between the Company and the Executive (i) in the event of any termination of the Executive's employment by the Company, whether such
termination was for Cause, or (ii) in the event of any termination of employment by the Executive, whether Good Reason existed, then, unless and until there is a final, nonappealable judgment
by a court of competent jurisdiction declaring that such termination was for Cause or that Good Reason did not exist, the Company shall pay all amounts, and provide all benefits, to the Executive
and/or the Executive's family or other beneficiaries, as the case may be, that the Company would be required to pay or provide pursuant to Section 6(a) hereof as though such termination were by
the Company without Cause or by the Executive with Good Reason; provided, however, that the Company shall not be required to pay any disputed amounts pursuant to this paragraph except upon receipt of
an undertaking (which need not be secured) by or on behalf of the Executive to repay all such amounts to which the Executive is ultimately adjudged by such court not to be entitled.

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 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 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 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 the Company's then current independent
public accountants (the "Accounting Firm") which shall provide detailed supporting calculations both to the Company and the Executive within 15 business

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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 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. The Accounting Firm shall furnish
the Executive with a written opinion that reporting the Excise Tax, or the failure to report the Excise Tax, as applicable, on the Executive's applicable federal income tax return in accordance with
the determination made by the Accounting Firm pursuant to this Section 9(b) should not result in the imposition of a negligence or similar penalty. 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 claims 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 it 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:



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 forego 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
direct the Executive to pay the tax claimed and 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

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Company
directs the Executive to pay such claim and sue for a refund, the Company shall advance the amount of such payment to the Executive, on an interest-free basis and 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 advance or
with respect to any imputed income with respect to such advance; 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. 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 receipt by the Executive of an amount advanced by the Company pursuant to Section (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 receipt by the Executive of an amount advanced by the Company 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 such advance shall be forgiven and shall not be required to be repaid and the amount of such advance shall be offset, to the extent thereof,
the amount of Gross-Up Payment required to be paid.

10.Confidential Information.Except for mental impressions retained by the Executive, 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). Except for mental impressions of confidential information retained by the Executive and utilized in
the ordinary course of business by the Executive in any subsequent employment, 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 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. If a Business Combination is consummated that would have resulted in a Change of Control but for the satisfaction of the conditions specified in clauses
(i), (ii) and (iii) of Section 2(c)

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and
if the parent corporation resulting from the Business Combination is other than the Company (hereinafter a "New Parent"), then, as a condition to consummation of this Business Combination, the New
Parent shall be considered a successor for purposes of this Section 11.

12.Miscellaneous.(a) This Agreement shall be an unfunded obligation of the Company.

(b)   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.

(c)   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 as follows:



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.

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

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

(f)    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.

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 these presents to be
executed in its name on its behalf, all as of the day and year first above written.

| |  | /S/ MICHAEL J. KILLELEAMichael J. Killelea
| |  | ------------------------------------------
| |  | POGO PRODUCING COMPANY                    
| |  | By                                        

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