EXHIBIT 10.16

                        PIONEER NATURAL RESOURCES COMPANY
                               SEVERANCE AGREEMENT


     This Severance  Agreement  (this  "Agreement")  is entered into,  effective
January 1,  2005,  between  Pioneer  Natural  Resources  Company  ("Parent"),  a
Delaware  corporation,  and [See  Exhibit  A] (the  "Officer").  As used in this
Agreement,  the term "Company"  shall be deemed to include Parent and its direct
or indirect wholly-owned subsidiaries.

                                    Recitals

     A.  Company  acknowledges  that  Officer is a  significant  employee of the
Company,  possessing skills and knowledge instrumental to the successful conduct
of the  Company's  business.  Company  is  willing  to  enter  into a  severance
arrangement  with  Officer  in order to better  ensure  itself of the  continued
management  services of Officer for itself and its subsidiaries and, in part, to
induce  Officer to continue to provide  those  services  and subject  himself to
certain restrictions regarding the use of Company information.

     B.  Officer is willing to  subject  himself to the  restrictions  mentioned
above in part to induce  Company to enter into a compensation  arrangement  that
provides  for,  among other  things,  the payment of certain  benefits  upon the
termination of Officer's employment under certain circumstances.

     Now,  therefore,  for and in  consideration  of the  mutual  covenants  and
agreements set forth herein and for other good and valuable  consideration,  the
receipt and  sufficiency of which are hereby  acknowledged,  the parties to this
Agreement hereby agree as follows:

     1.  Position and Duties.  Officer  shall  initially  serve  Company as [See
Exhibit A], and, in so doing,  shall report to Company's Board of Directors (the
"Board"),  Company's Chief Executive Officer (the "Chief Executive  Officer") or
such officers of Company as is prescribed by Company's bylaws, by resolutions of
the Board or by direction of the Chief  Executive  Officer.  Officer  shall have
supervision  and control  over,  and  responsibility  for, such  management  and
operational  functions of the Company currently  assigned to such position,  and
shall   have  such   other  or   different   functions,   powers,   duties   and
responsibilities   (including   holding  officer  positions  with  one  or  more
subsidiaries of Parent),  as may from time to time be prescribed by the Board or
the Chief  Executive  Officer,  or any other  Company  officer  to whom  Officer
reports,  so long as such  functions,  powers  and  duties  are  reasonable  and
customary  for a [See Exhibit A] serving an  enterprise  comparable  to Company.
Employee's  failure to accept and  perform  such other or  different  functions,
powers or duties shall be deemed to be a Termination  of Employment by voluntary
action of Employee, and shall not constitute a Termination for Good Reason.

     2.  Devotion of  Efforts.  So long as Officer is serving the Company in the
capacities  described in Section 1, he/she shall devote his/her full time, skill
and  attention  and his/her best efforts  during  normal  business  hours to the
business  and  affairs  of the  Company  to the extent  necessary  to  discharge
faithfully  and  efficiently  his/her  duties and  responsibilities,  except for
usual,  ordinary and customary periods of vacation and absence due to illness or
other  disability  or such  periods of leave as are  approved  in writing by the
Board or the Chief Executive  Officer.  The provisions of this Section shall not
be construed to prevent Officer from making  investments in other  businesses or
enterprises,  so long as such investments do not violate the Company's  conflict
of interest  policies or require  the  provision  of services by Officer to such
businesses  or  enterprises  to an extent that would  interfere  in any material
respect with the  performance of Officer's  duties and  responsibilities  to the
Company.

     3. Compensation.

        (a) Base Salary.  As compensation  for Officer's  services,  the Company
shall pay Officer an annualized base salary of a specified amount per annum (the
"Base  Salary").  The  Base  Salary  shall be  payable  in  substantially  equal
semi-monthly  installments.   The  Compensation  Committee  of  the  Board  (the
"Compensation  Committee") may review the Base Salary periodically and may grant
such  increases,  or  effect  such  reductions,   in  the  Base  Salary  as  the
Compensation   Committee   considers   appropriate   in  accordance   with  such
compensation  guidelines and policies as it may establish from time to time. The

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Base Salary applicable from time to time for any period of Officer's  employment
with the Company,  commencing on the effective date of this Agreement,  shall be
that as reflected in the records of the Human Resources Department.

        (b) Bonuses.  Officer shall be  entitled to receive  (in addition to the
Base Salary) such annual or other periodic bonus as the  Compensation  Committee
may award in accordance with such compensation guidelines and policies as it may
establish from time to time.

        (c) Other Benefits.  Officer  shall be  entitled to  participate in,  or
receive  benefits under,  any employee  benefit plan or other  arrangement  made
available  now or in the  future by the  Company to the  officers  of Company (a
"Benefit Plan"), subject to the terms,  conditions and overall administration of
such Benefit Plan. Officer's participation in, or receipt of benefits under, any
Benefit Plan shall be in addition to (and not in lieu of) the Base Salary.

        (d) Vacations and Holidays.  Officer shall be  entitled to the number of
paid vacation days in each calendar year determined by Company from time to time
for its officers and shall be entitled to all paid holidays given by the Company
to its employees in general.

     4.  Relocation.  Officer  shall  initially  be required to perform  his/her
duties and  responsibilities  hereunder  at  Company's  offices  located in [See
Exhibit  A]. If the  Company  requires  Officer  to perform  his/her  duties and
responsibilities  at any  location  that is more than 50 miles from the  nearest
border of [See Exhibit A] (a "New Location") and, within 30 days after receiving
notice thereof,  Officer accepts such relocation rather than terminating his/her
employment  with the Company  pursuant to Section 5(a), the Company shall pay to
Officer,  or shall reimburse Officer for (upon submission of reasonably detailed
evidence thereof), such sums as are provided for under the Relocation Policy for
Exempt  Employees as  established by Company.  Officer's  failure to accept such
relocation within 30 days after receiving notice thereof,  shall be deemed to be
a  Termination  of  Employment  by  voluntary  action of Officer,  and shall not
constitute a Termination for Good Reason.

     5. Termination of Employment.

        (a) Right to Terminate. Officer's employment with the Company (including
his/her  officer  position  with Company)  shall be  terminated  upon the death,
Disability  (as  defined  in  subsection  (f)(3)  of  this  Section)  or  Normal
Retirement  (as defined in  subsection  (f)(5) of this  Section) of Officer.  In
addition,  Officer's  employment  with the Company  (including  his/her  officer
position  with  Company) may be  terminated  at any time and for any reason as a
result of a dismissal  by the  Company or as a result of a  voluntary  action by
Officer.  Any  such  termination  of  employment  is  referred  to  herein  as a
"Termination of Employment."

        (b) Notice of Termination.

            (1)  Any Termination of  Employment that  is the result of Officer's
         Disability shall be communicated by the Company to Officer in a written
         notice thereof.  Such notice  shall state that,  in the  opinion of the
         Board,  Officer is suffering from a  Disability and  such Disability is
         the reason for the Termination of Employment.

            (2)  Any Termination of  Employment that  is the result of Officer's
         Normal  Retirement  shall  be communicated by  Officer to  Company by a
         written  notice  thereof.  Such notice  shall  state  that  Officer  is
         retiring and shall  specify the date of such Termination of Employment,
         which shall be not less than  30 days following the date such notice is
         received by Company.

            (3) Any Termination of Employment  that is the result of a dismissal
         by the Company (but is not the result of Officer's Disability) shall be
         communicated by  the Company  to Officer  by a written  notice thereof.
         Such notice  shall state  whether or not (in the Company's opinion) the
         Termination of  Employment  constitutes  a Termination  for  Cause  (as
         defined in  subsection  (f)(6) of this  Section) and, if so,  shall set
         forth in reasonable detail facts and circumstances constituting a basis
         for such Termination for Cause.


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            (4) Any Termination  of Employment that is the result of a voluntary
         action  by   Officer  (but  is  not  the  result  of  Officer's  Normal
         Retirement) shall  be communicated  by  Officer  to  Company by written
         notice thereof.  Such notice shall state  whether or not  (in Officer's
         opinion) the  Termination of  Employment constitutes  a Termination for
         Good Reason (as defined in  subsection (f)(7) of this  Section) and, if
         so, shall set  forth in reasonable  detail the  facts and circumstances
         claimed as the basis for such Termination for Good Reason.  Such notice
         shall also specify the date of such  Termination of  Employment,  which
         (if the Termination of Employment does not constitute a Termination for
         Good Reason)  shall be  not less  than 30 days  following the date such
         notice is received by Company.

        (c) Date of Termination of Employment. For purposes of this Agreement,
the date of a  Termination  of  Employment  shall be (1) if the  Termination  of
Employment is the result of Officer's  death, the date of such death, (2) if the
Termination  of  Employment is the result of Officer's  Disability,  the date on
which the notice  described in subsection  (b)(1) of this Section is received by
Officer,  (3) if the Termination of Employment is the result of Officer's Normal
Retirement,  the date specified in the notice described in subsection  (b)(2) of
this Section,  (4) if the Termination of Employment is the result of a dismissal
by the  Company  (but is not the result of  Officer's  Disability),  the date on
which the notice  described in subsection  (b)(3) of this Section is received by
the  Officer,  or such later  date as may be  specified  by the  Company in such
notice,  and (5) if the  Termination  of Employment is the result of a voluntary
action by Officer (but is not the result of Officer's  Normal  Retirement),  the
date specified in the notice described in subsection (b)(4) of this Section,  or
such  earlier  date as the  Company  may  specify,  provided  that if such  date
specified by Company is less than 30 days  following  the date Company  received
notice from  Employee,  then  Company  agrees to pay officer an amount  equal to
one-twelfth (1/12) of Officer's Base Salary,  which amount shall be paid in cash
on the date of such Termination of Employment.

        (d) Payments Due Upon Termination of Employment. The provisions of
subsections  (d)(1)  and  (d)(3)  of  this  Section  shall  apply  to  any  such
Termination of Employment,  whether occurring prior to, at the time of or at any
time  following  a Change in Control (as  defined in  subsection  (f)(2) of this
Section);  and the  provisions of subsection  (d)(2) of this Section shall apply
only if such Termination of Employment is prior to a Change in Control.

            (1) Death,  Disability or Normal  Retirement.  If the Termination of
         Employment  is the  result of  Officer's  death,  Disability or  Normal
         Retirement,  the Company shall pay the following amounts to Officer (or
         his/her estate or personal representative):

                (A) The Base Salary  (at the rate  in effect on the date of such
         Termination of  Employment,  as reflected in  the records  of the Human
         Resources Department)  pro-rated through and including the date of such
         Termination of Employment, to the extent not already paid, which amount
         shall be  paid in  cash on the  first normal  semi-monthly  Base Salary
         payment date immediately  succeeding  the date  of such  Termination of
         Employment;

                (B) Any amounts arising from Officer's participation in, or
         benefits under, any Benefit Plan through and including the date of such
         Termination of Employment, which amounts shall be payable in accordance
         with the terms and conditions of such Benefit Plan; and

                (C) An amount equal to one full year's Base Salary (at the rate
         in effect on the date of such Termination of Employment, as reflected
         in the records of the Human Resources Department), which amount shall
         be paid in cash within 30 days following the date of such Termination
         of Employment.

            (2) Termination for Good Reason or Not for Cause. If the Termination
         of Employment  (i) is  the result of a dismissal by the Company (but is
         not the  result of  Officer's  Disability)  and  does not  constitute a
         Termination for Cause or (ii) is the result  of a  voluntary  action by


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         Officer  (but is not  the result  of Officer's  Normal  Retirement) and
         constitutes a Termination for Good  Reason,  the Company  shall pay the
         following amounts, and provide the following benefits to Officer:

                (A) The Base Salary  (at the rate  in effect on the date of such
         Termination of  Employment,  as reflected in  the records  of the Human
         Resources Department) pro-rated through and including the  date of such
         Termination of Employment, to the extent not already paid, which amount
         shall be paid in cash on the date of such Termination of Employment;

                (B) Any  amount arising  from  Officer's  participation  in,  or
         benefits under, any Benefit Plan through and including the date of such
         Termination of Employment, which amounts shall be payable in accordance
         with the terms and conditions of such Benefit Plan;

                (C) A lump sum  amount equal to  one full year's Base Salary (at
         the rate in effect on the date  of such  Termination of  Employment, as
         reflected in  the records  of the  Human  Resources  Department), which
         amount  shall be  paid  in  cash on  the date  of such  Termination  of
         Employment;

                (D) For  a  period  of  one  year  following  the  date  of such
         Termination  of  Employment,  a  continuation of  all health  insurance
         coverage applicable  at the  time of  such Termination of Employment to
         Officer and Officer's immediate family under any Benefit Plan; and

                (E) With respect  to a Termination  of Employment  described  in
         subsection (d)(2)(i) of this Section,  if  the  date of  Termination of
         Employment  is  less  than  thirty (30)  days after the  date of notice
         thereof,  an amount equal  to one-twelfth  (1/12) of the Officer's Base
         Salary,  which  amount  shall  be paid  in  cash  on the  date of  such
         Termination of Employment.

            (3) Termination for Cause or Not for Good Reason. If the Termination
         of Employment  (i) is  the result of a dismissal by the Company (but is
         not the result of  Officer's Disability)  and constitutes a Termination
         for Cause or (ii) is the result  of a voluntary  action by Officer (but
         is not  the  result  of  Officer's  Normal  Retirement)  and  does  not
         constitute a  Termination for  Good  Reason,  the Company shall pay the
         following amounts to Officer:

                (A) The Base  Salary (at  the rate in effect on the date of such
         Termination of Employment,  as reflected  in the  records of  the Human
         Resources Department) pro-rated through and including the date  of such
         Termination of Employment, to the extent not already paid, which amount
         shall be  paid in  cash on  the first  normal semi-monthly  Base Salary
         payment date  immediately  succeeding the date  of such  Termination of
         Employment; and

                (B) Any  amounts  arising from  Officer's participation  in,  or
         benefits under, any Benefit Plan through and including the date of such
         Termination of Employment, which amounts shall be payable in accordance
         with the terms and conditions of such Benefit Plan.

            (4) Payment  Contingent  on  Release.  If  Officer's  Termination of
         Employment is prior to  a Change in Control  (and only in  that event),
         and Officer is otherwise entitled to the payment provided in subsection
         (d)(2)  of this  Section,  then such  payment shall  be subject to, and
         contingent upon, Officer's execution of a General  Release Agreement in
         favor of the Company in substantially the form and substance as the one
         attached hereto as Schedule A.

        (e) Additional  Provisions Applicable  Upon  Termination  of  Employment
Concurrent with or Following Change in Control.  The following  provisions shall
apply to any such Termination of Employment  occurring at the time of, or at any
time within one year following, a Change in Control.


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            (1) Termination for Good Reason or Not for Cause. If the Termination
         of Employment (i) is the result of a dismissal  by the  Company (but is
         not the  result  of Officer's  Disability) and  does  not  constitute a
         Termination for Cause, or (ii) is the  result of a voluntary  action by
         Officer  (but is  not the result of  Officer's Normal  Retirement)  and
         constitutes a Termination for  Good Reason,  the Company shall  pay the
         following amounts, and provide the following benefits, to Officer:

                (A) The  Base Salary  (at the rate in effect on the date of such
         Termination of Employment,  as reflected  in the  records of  the Human
         Resources Department) pro-rated through and including the date  of such
         Termination of Employment, to the extent not already paid, which amount
         shall be paid in cash on the date of such Termination of Employment;

                (B) A  lump  sum  in  cash  equal to  2.99 times  the sum of (i)
         Officer's  Base  Salary  (at the  rate in  effect on  the date  of such
         Termination  of Employment,  as reflected  in the records  of the Human
         Resources Department), plus (ii) the greater of the then current year's
         targeted bonus or actual bonus award (if applicable) for Officer, which
         amount shall be paid in cash on the date of such Termination of
         Employment;

                (C) Any amount  arising  from  Officer's  participation  in,  or
         benefits under,  any employee  Benefit Plan  or other  arrangement made
         available now or in the future by the Company to its employees, through
         and including the date of such Termination of Employment, which amounts
         shall be payable in accordance with the terms and conditions of such
         Benefit Plan;

                (D) For  a  period of  one  year  following  the  date  of  such
         Termination  of  Employment,  a  continuation of  all health  insurance
         coverage  applicable at  the time of such  Termination of Employment to
         Officer and his/her immediate family under any Benefit Plan; and

                (E) With  respect  to a  Termination of  Employment described in
         subsection (e)(1)(i) of this  Section,  if the  date of  Termination of
         Employment is  less  than thirty  (30) days  after the  date of  notice
         thereof, an amount equal  to one-twelfth (1/12)  of the  Officer's Base
         Salary,  which amount  shall be  paid  in  cash  on  the  date  of such
         Termination of Employment.

            (2) Voluntary  Termination  Not for  Good Reason  or for  Failure to
         Relocate. Notwithstanding any other provision of this subsection (e) to
         the contrary,  if the Termination of Employment  (i) is the result of a
         voluntary action by Officer, does not constitute a Termination for Good
         Reason,  and occurs  at least  six  months, but not more than one year,
         following  a  Change   in  Control,   or  (ii)   whether  voluntary  or
         involuntary,  occurs at  the time of, or at any  time  within  one year
         following,  a Change in Control  and following the Company's  requiring
         the Officer to perform his/her duties and responsibilities hereunder at
         a New  Location, which  relocation is not accepted by Officer within 30
         days after  receiving notice  thereof, then  the Company  shall pay  to
         Officer all amounts that would be payable pursuant to subsection (d)(2)
         of this Section had such Termination of  Employment  occurred  prior to
         the Change in Control and constituted a Termination for Good Reason.

            (3) Excise Tax and Gross-Up Payment.

                (A) If any portion of such compensation  constitutes a parachute
         payment  (a "Payment")  and is  subject to  the Excise Tax (hereinafter
         defined),   then  Company  shall,   in  addition   to  providing   such
         compensation, pay the Gross-Up Payment (hereinafter defined) to Officer
         in the  manner  described below.  For purposes of  this Agreement,  (i)
         "Excise Tax" shall mean the tax imposed pursuant to section 4999 of the
         Code and any interest or penalties incurred by the Officer with respect
         to such  Excise  Tax,  and  (ii) "Gross-Up  Payment" shall  mean,  with
         respect  to  any  compensation  provided  to  the  Officer  by  Company
         (including  without limitation  the payments  provided for  under  this
         Agreement and any payments to  the  Officer under any  employee benefit

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         plan,  including  without  limitation the Company's Long-term Incentive
         Plan, or other  arrangement)  that is  subject to  the  Excise  Tax, an
         amount that, after reduction of the amount of such Gross-Up Payment for
         all federal, state, and local tax (including any interest or  penalties
         imposed with respect to  such taxes) to which  the Gross-Up  Payment is
         subject  (including  the Excise  Tax to  which the  Gross-Up Payment is
         subject),  is  equal  to the  amount of  the Excise  Tax to  which such
         compensation is subject.  For purposes of determining the amount of any
         Gross-Up Payment,  Officer shall  be deemed to pay federal income taxes
         at the highest  marginal rate  of taxation  and state  and local taxes,
         if applicable, at the highest marginal  rate of  taxation  in the state
         and locality of  residence of  the Officer  on the Date of Termination,
         net of the  maximum reduction  in federal  income  taxes that  could be
         obtained from deduction of such state and local taxes, if any.

                (B) Subject  to the  provisions of  subsection  5(e)(3)(C),  all
         determinations  required  to  be made  under this  subsection  5(e)(3),
         including whether and when  a Gross-Up  Payment is required, the amount
         of such Gross-Up Payment and the assumptions to be utilized in arriving
         at such  determination,  shall  be made  by the  accounting firm  which
         performed  the  audit of the Company for the year preceding the year in
         which the  Change in  Control occurred  (the  "Accounting Firm")  which
         shall provide detailed supporting calculations both to the Company  and
         the Officer within 15 business days of the receipt  of notice from  the
         Officer 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 in Control,  the Officer  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  subsection 5(e)(3), shall be paid by the
         Company  to  the  Officer  within  five  days  of  the  receipt  of the
         Accounting Firm's determination. If the Accounting Firm determines that
         no Excise Tax is payable by the Officer,  it shall furnish  the Officer
         with a written  opinion  that failure  to  report the Excise Tax on the
         Officer's  applicable  federal income  or excise  tax return  would 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 Officer.

                (C) The Officer 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 no later  than ten business days after the Officer is informed
         in writing of such claim. The Officer 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 Officer in writing  prior to the expiration of
         such period  that it desires  to contest  such claim,  (i) the  Officer
         shall  accept legal  representation with  respect to  such claim  by an
         attorney  reasonably  selected by  the Company, (ii) cooperate with the
         Company in good faith in order to  effectively  contest such claim, and
         (iii) permit the Company to participate in any  proceedings relating to
         such claim; provided, however, the Company shall  bear and pay directly
         all costs  and  expenses  (including  legal  and  accounting  fees  and
         additional  interest  and  penalties) incurred  in connection with such
         contest and  shall indemnify  and  hold  the Officer  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. The Company shall
         control all proceedings  taken in connection  with such  contest to the
         extent  relating to  issues impacting  whether  a  Gross-Up Payment  is
         payable hereunder. The Officer 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 in connection with such contest.

                (D) If  any such  claim referred  to in subsection 5(e)(3)(C) is
         made by the Internal Revenue Service and  the Company  does not request
         the Officer to contest the  claim within  the  30-day period  following


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         notice of the claim, the Company shall pay to the Officer the amount of
         any  Gross-Up  Payment  owed to  the  Officer,  but not previously paid
         pursuant to subsection 5(e)(3)(B), immediately  upon the  expiration of
         such 30-day period.  If any such claim is made by the Internal  Revenue
         Service and the Company requests the Officer to contest such claim, the
         Company shall  pay to  the Officer  the amount  of any Gross-Up Payment
         owed to the  Officer, but  not previously paid  under the provisions of
         subsection 5(e)(3)(B), within five days of a Final Determination of the
         liability  of the  Officer for  such Excise  Tax.  For purposes of this
         Agreement,  a  "Final  Determination"  shall be  deemed to  occur  with
         respect to a claim when (i)  there is a decision,  judgment,  decree or
         other order by any  court of  competent  jurisdiction,  which decision,
         judgment, decree or other order has become  final, i.e.,  all allowable
         appeals have been exhausted by either  party to the action,  (ii) there
         is a closing agreement  made under Section 7121  of the Code,  or (iii)
         the time for  instituting a claim for refund has expired, or if a claim
         was filed,  the time  for instituting  suit with  respect  thereto  has
         expired.

            (4) Letter of Credit.  Following a Change in Control, Parent (within
         10 days following  receipt  of Officer's  written request therefor), at
         its sole cost and expense, shall  post an irrevocable  letter of credit
         with a  banking  institution  reasonably  acceptable  to Officer  in an
         amount equal to the maximum amount of the aggregate cash  payments that
         would be made to Officer pursuant to the provisions of paragraph (1) of
         this subsection if the  provisions of paragraph  (1) of this subsection
         were  to  become  applicable.   Such  letter  of  credit  shall contain
         provisions  making  the  funds  available  thereunder  to   Officer  by
         Officer's drafts drawn at sight at any time and from time to time. Such
         provisions shall permit Officer to present drafts (including drafts for
         partial draws)  drawn  at sight  by  presentation  by  Officer  to  the
         applicable banking  institution of a  written  statement to  the effect
         that  the  Company is  in default  on a  payment to  be made to Officer
         pursuant to the terms of  this Agreement  (setting forth  the amount of
         such payment in  default) and that Officer is not in default under, and
         has not breached the terms of, this Agreement. Parent shall continue to
         keep such letter of credit in place until the expiration of at least 60
         days following  the date of a Termination of Employment occurring after
         the Change in Control.

            (5) Retirement  Benefits  Funded.  Upon  a  Change  in  Control, any
         accrued but unfunded retirement  benefit obligations  to Officer  under
         any then  existing  retirement plan  shall be  fully funded  to a Rabbi
         Trust  for the  benefit of  such Officer, which amount shall be paid in
         cash on the date of such Change in Control.

        (f) Certain  Definitions.  As used  in the Section and elsewhere in this
Agreement, the following terms shall have the respective meanings indicated:

            (1) "Across-the-Board  Salary  Reduction"  shall mean a reduction in
         the Base Salary that is a part of, and is at a  rate consistent with, a
         reduction in the base  salaries paid  to substantially  all officers of
         Company.

            (2) "Change in  Control"  shall mean the  occurrence, following  the
         Effective Date hereof, of either of the following events:  (i) an event
         that would constitute  a Change in  control as  that term is defined in
         the Company's  Long-Term Incentive Plan, or any successor plan thereto,
         or  (ii)  consummation  of   a  Business   Combination  not   otherwise
         constituting a  Change in  Control  but,  pursuant  to which the Person
         serving as Chief Executive Officer at the time of the  execution of the
         initial agreement is removed from,  or replaced in,  such capacity with
         respect to the corporation resulting from such Business Combination.

            (3) "Disability"  shall mean Officer's physical or mental impairment
         or incapacity of sufficient severity that, in the opinion of the Board,
         either (A)  Officer is unable to continue to perform his/her duties and
         responsibilities  hereunder or  (B) Officer's condition entitles him to
         disability benefits under any  Benefit Plan providing  for the  payment
         thereof.


                                      -7-
                                                                        --------
                                                                        initials






            (4) "Excessive Salary Reduction"  shall mean  (A) a reduction in the
         Base  Salary  that  is  not  an  Across-the-Board Salary  Reduction (as
         defined in  paragraph (1)  of this  subsection) and that, when combined
         with the net effect  of all prior  increases and reductions in the Base
         Salary (other  than prior  reductions that were Across-the-Board Salary
         Reductions),  results  in the  Base Salary  being less  than 80% of the
         highest Base Salary to which Officer has ever been subject  pursuant to
         this Agreement  (as reflected  in the  records of  the Human  Resources
         Department) or  (B) a  reduction  in the Base Salary (whether or nor an
         Across-the-Board Salary Reduction) that,  when  combined  with  the net
         effect  of  all  prior  increases  and  reductions  in the Base  Salary
         (whether or  not  Across-the-Board  Salary  Reductions), results in the
         Base Salary being less  than 65% of  the highest  Base Salary  to which
         Officer has ever been  subject pursuant to this Agreement (as reflected
         in the records of the Human Resources Department).

            (5) "Normal  Retirement"  shall have the meaning  given to such term
         in Section  1.29 of the  Long-term Incentive Plan.

            (6) "Termination for  Cause" shall  mean a Termination of Employment
         as a result of  a  dismissal by  the  Company  following (A)  Officer's
         continued  failure   to  substantially   perform  his/her   duties  and
         responsibilities (other than any such failure resulting from  Officer's
         physical or mental impairment  or incapacity)  after written demand for
         substantial  performance  is  delivered  by  the  Company  specifically
         identifying the manner  in which  the Company  believes Officer has not
         substantially  performed  his/her  duties  and  responsibilities,   (B)
         Officer's engaging in fraud or  other misconduct that  is injurious  to
         the  Company,  monetarily  or  otherwise,  (C)  Officer's  engaging  in
         insubordination, (D) Officer's violation of, or failure to comply with,
         any written policy, guideline, rule or regulation of the Company  which
         specifically  provides  that  Officer  may  be  dismissed  (or  his/her
         employment  terminated)  as a  consequence of  any  such  violation  or
         failure to comply, (E) Officer's conviction  of (or  plea of  guilty or
         nolo contendere to a charge of) any felony, or any crime or misdemeanor
         involving  moral turpitude  or financial  misconduct, or (F) a material
         violation by  Officer of  the provisions of  Section 6. For purposes of
         clause (B) above, an act, or failure to act, on Officer's part shall be
         considered "misconduct"  if done,  or omitted,  by Officer  not in good
         faith and  without  reasonable belief that such act, or failure to act,
         was in the best interest of the Company.

            (7) "Termination  for  Good  Reason"  shall  mean  a  Termination of
         Employment as a result of voluntary  action  by Officer  within 30 days
         after receiving notice of (A) the demotion of the Officer to an officer
         position junior to the officer  position specified in Section 1 or to a
         non-officer position, (B) an  Excessive Salary Reduction (as defined in
         paragraph (4)  of  this subsection),  or (C)  the failure  by Parent to
         obtain the assumption agreement described in  Section 7(h)  on or prior
         to a succession described in Section 7(h).

6.    Nonpublic Information.

     (a) Officer hereby acknowledges that, in connection with his/her employment
with the  Company,  he has  received,  and will  continue  to  receive,  various
information regarding the Company and its business,  operations and affairs. All
such information, to the extent not publicly available other than as a result of
a disclosure by Officer in violation of this Agreement, is referred to herein as
the "Nonpublic Information."

     (b) Officer  hereby  agrees  that,  from  and  after  the  date  hereof and
continuing until three (3) years following a Termination of Employment,  he will
keep all  Nonpublic  Information  confidential  and will not,  without the prior
written  consent  of the  Board or the Chief  Executive  Officer,  disclose  any
Nonpublic  Information in any manner whatsoever or use any Nonpublic Information
other than in connection with the performance of his/her services to the Company
hereunder;  provided,  however, that the provisions of this subsection shall not
prevent  Officer from (1)  disclosing  any  Nonpublic  Information  to any other
employee of the Company or to any  representative  or agent of the Company (such
as an independent accountant, engineer, attorney or financial advisor) when such
disclosure is reasonably  necessary or  appropriate  (in Officer's  judgment) in
connection   with  the   performance   by   Officer   of   his/her   duties  and


                                      -8-
                                                                        --------
                                                                        initials






responsibilities  hereunder  or (2)  disclosing  any  Nonpublic  Information  as
required by applicable  law,  rule,  regulation or legal process (but only after
compliance with the provisions of subsection (c) of this Section).

     (c) If Officer is  requested pursuant  to, or required by,  applicable law,
rule, regulation or legal process to disclose any Nonpublic Information, Officer
will notify Parent  promptly so that the Company may seek a protective  order or
other appropriate remedy or, in the Company's sole discretion,  waive compliance
with the terms of this Section,  and Officer will fully cooperate in any attempt
by the Company to obtain any such protective  order or other remedy.  If no such
protective order or other remedy is obtained,  or the Company waives  compliance
with the terms of this  Section,  Officer  will  furnish or  disclose  only that
portion of the Nonpublic  Information  as is legally  required and will exercise
all reasonable efforts to obtain reliable assurance that confidential  treatment
will be accorded the Nonpublic Information that is so disclosed.

7.   Miscellaneous Provisions.

     (a) Mitigation. Officer shall not be required to mitigate the amount of any
payment provided for in this Agreement by seeking other employment or otherwise,
and the  amount  of any  payment  provided  for in this  Agreement  shall not be
reduced by any  compensation  earned by Officer as the result of  employment  by
another employer after the date of any Termination of Employment or otherwise.

     (b) Interest.  Until paid,  all past due amounts required to be paid by the
Company to Officer under any provision of this Agreement  shall bear interest at
the per annum rate equal to the higher of (1) twelve percent  (12%),  or (2) the
prime rate  announced  from time to time by the  Company's  primary bank lender,
plus three percent (3%), both subject to the maximum rate allowed by law.

     (c) Equitable Relief Available.  Officer acknowledges  that remedies at law
may be inadequate to protect the Company against any actual or threatened breach
of the provisions of Section 6 by Officer. Accordingly, without prejudice to any
other rights or remedies otherwise available to the Company, Officer agrees that
the Company shall have the right to equitable and  injunctive  relief to prevent
any breach of the  provisions  of Section 6, as well as to such damages or other
relief as may be  available  to the Company by reason of any such breach as does
occur.

     (d) At-Will Employment.  Officer acknowledges  that his/her employment with
the Company is strictly "at-will",  and that nothing contained in this Agreement
shall confer upon Officer the right to continue in the employ of the Company, or
interfere  in any way  with the  rights  of the  Company  to  terminate  his/her
employment at any time for any reason.  Officer further  acknowledges  that this
Agreement is not an "employment  agreement" or "employment contract" (written or
otherwise),  as either term is used or defined in, or  contemplated by or under,
(i) the Company's  Long-Term Incentive Plan, (ii) any other plan or agreement to
which the Company is a party, or (iii) applicable statutory, common or case law.

     (e) Breach Not a Defense.  The representations and covenants on the part of
Officer  contained  in  Section  6  shall  be  construed  as  ancillary  to  and
independent of any other provision of this  Agreement,  and the existence of any
claim or cause  of  action  of  Officer  against  the  Company  or any  officer,
director,  stockholder or representative of the Company,  whether  predicated on
this Agreement or otherwise,  shall not constitute a defense to the  enforcement
by the Company of the covenants on the part of Officer contained in Section 6.

     (f) Notices.  Any notice or other  communication called for by the terms of
this  Agreement  shall be in  writing  and  either  delivered  personally  or by
registered or certified mail (postage prepaid and return receipt  requested) and
shall be deemed given when received at the following addresses (or at such other
address for a party as shall be specified by like notice):

          (1)  If to Parent or the Company, 5205 North O'Connor Boulevard, Suite
      900, Irving, Texas 75039, Attention:  General Counsel.

          (2)  If to Officer,  the address  of Officer set forth below Officer's
      signature on the signature page of this Agreement.


                                      -9-
                                                                        --------
                                                                        initials






     (g) Assumption by Successor of Parent.  Parent shall  require any successor
(whether  direct or  indirect)  to all or  substantially  all of the business or
assets of Parent (whether by purchase of securities, merger, consolidation, sale
of  assets  or  otherwise),  by  a  written  agreement  in  form  and  substance
satisfactory  to  Officer,   to  expressly  assume  and  agree  to  perform  the
obligations to be performed by Parent or the Company under this Agreement in the
same manner and to the same extent that Parent or the Company  would be required
to perform if no such succession had taken place.

     (h)  Assignment.

          (1) Except  pursuant to  an assumption  by a  successor  described  in
      subsection (h) of this Section, the rights and obligations of  the Company
      pursuant to this Agreement  may not  be assigned,  in whole or in part, by
      the Company  to any  other person  or entity  without  the express written
      consent of Officer.

          (2) The rights and obligations of  Officer  pursuant to this Agreement
      may not be assigned,  in whole or in part,  by Officer to any other person
      or entity without the express written consent of the Board.

     (i) Successors.  This Agreement shall be binding on, and shall inure to the
benefit of, the  Company,  Officer and their  respective  successors,  permitted
assigns, personal and legal representatives,  executors, administrators,  heirs,
distributees, devisees and legatees, as applicable.

     (j) Amendment and Waivers.  Except as hereinafter provided, no provision of
this Agreement may be amended or otherwise  modified,  and no right of any party
to this Agreement may be waived,  unless such amendment,  modification or waiver
is agreed to in a written  instrument  signed by Officer  and  Parent.  Unless a
Change of Control  shall  have  occurred  or be pending or under  consideration,
Parent  may  amend,  modify,  or waive  any  provision  of, or  terminate,  this
Agreement upon sixty (60) days notice  without the consent of Officer;  provided
that any such amendment,  modification,  waiver or termination  shall be made to
all  severance  agreements of Parent  covering all officers of Parent  similarly
situated to Officer.  No waiver by either party hereto of, or  compliance  with,
any condition or provision of this  Agreement to be performed by the other party
hereto  shall  be  deemed  a waiver  of  similar  or  dissimilar  provisions  or
conditions at the same or at any prior or subsequent time.

     (k) Complete Agreement.  This Agreement  replaces and  supersedes all prior
agreements, if any, among the parties with respect to the subject matter hereof,
and the provisions of this Agreement  constitute the complete  understanding and
agreement  among the parties with respect to the subject matter  hereof,  and no
agreements  or  representations,  oral or  otherwise,  express or implied,  with
respect to the subject  matter  hereof have been made by either  party which are
not set forth expressly in this Agreement.

     (l) Governing Law.  THIS AGREEMENT  IS BEING  MADE AND  EXECUTED IN, AND IS
INTENDED  TO BE  PERFORMED  IN,  THE  STATE OF  TEXAS  AND  SHALL  BE  GOVERNED,
CONSTRUED,  INTERPRETED AND ENFORCED IN ACCORDANCE WITH THE SUBSTANTIVE  LAWS OF
THE STATE OF TEXAS.

     (m) Attorney Fees.  All legal  fees and other  costs incurred by Officer in
connection  with  the  resolution  of any  dispute  or  controversy  under or in
connection with this Agreement shall be reimbursed by the Company to Officer, if
such dispute or controversy  is resolved in favor of Officer.  The Company shall
be  responsible  for, and shall pay, all legal fees and other costs  incurred by
the Company in  connection  with the  resolution  of any dispute or  controversy
under or in connection with this  Agreement,  regardless of whether such dispute
or controversy is resolved in favor of the Company or Officer.

     (n) Counterparts.  This Agreement may  be executed in several counterparts,
each of which shall be deemed to be an original,  but all of which together will
constitute one and the same agreement.


                                      -10-
                                                                        --------
                                                                        initials






     (o) Construction.  The captions of the Sections, subsections and paragraphs
of this  Agreement  have been inserted as a matter of  convenience  of reference
only and shall not affect the  meaning  or  construction  of any of the terms or
provisions of this Agreement.  Unless  otherwise  specified,  references in this
Agreement  to  a  "Section,"   "subsection,"   "paragraph,"   "subparagraph"  or
"Schedule"  shall be considered to be  references  to the  appropriate  Section,
subsection,   paragraph,   subparagraph  or  Schedule,   respectively,  of  this
Agreement.  Unless  the  context  otherwise  requires,  all  words  used in this
Agreement in any gender shall include the masculine, feminine and neuter gender,
all singular  words shall  include the plural and all plural words shall include
the  singular.  As used in this  Agreement,  the  term  "including"  shall  mean
"including, but not limited to."

     (p) Validity and Severability.  If any term  or provision of this Agreement
is held to be illegal, invalid or unenforceable under the present or future laws
effective during the term of this Agreement, (1) such term or provision shall be
fully  severable,  (2) this Agreement shall be construed and enforced as if such
term or  provision  had never  comprised  a part of this  Agreement  and (3) the
remaining  terms and provisions of this Agreement shall remain in full force and
effect and shall not be affected by the illegal,  invalid or unenforceable  term
or provision or by its severance from this  Agreement.  Furthermore,  in lieu of
such illegal,  invalid or unenforceable term or provision,  there shall be added
automatically  as a part of this  Agreement,  a term or  provision as similar to
such illegal,  invalid or unenforceable term or provision as may be possible and
be legal, valid and enforceable.

     (q) Execution by Company.  The execution of this Agreement by Company shall
constitute  an  acceptance  of, and an  agreement  to be bound by, the terms and
provisions  of this  Agreement  by Company  and each of its direct and  indirect
wholly-owned subsidiaries, and Company hereby agrees to cause each of its direct
and indirect wholly-owned  subsidiaries,  now and in the future, to fully comply
with all  obligations  applicable  to the Company  pursuant to the terms of this
Agreement.




                            (SIGNATURE PAGE ATTACHED)



                                      -11-

                                                                        --------
                                                                        initials








     In witness whereof,  the parties have executed this Agreement  effective as
of the date first written above.

                        PIONEER NATURAL RESOURCES COMPANY




                        By:   /s/ Scott D. Sheffield
                             --------------------------------------------
                        Name:  Scott D. Sheffield
                        Title: Chief Executive Officer and Chairman




                        OFFICER:




                        -------------------------------------------------

                        Address:


                        -------------------------------------------------

                        -------------------------------------------------



              [Signature Page - Severance Agreement - Page 1 of 1]






                                   Schedule A

                            GENERAL RELEASE AGREEMENT


NOTICE:  Various  state and federal  laws and  regulations  prohibit  employment
discrimination  based on age,  race,  color,  religion,  sex,  national  origin,
disability,  citizenship,  and  membership or  application  for  membership in a
uniformed  service.  These  laws  are  enforced  through  the  Equal  Employment
Opportunity  Commission,  U.S.  Department of Labor,  Texas  Commission on Human
Rights,  and other federal and state  agencies.  You are advised to discuss this
release  with your  attorney.  In any event,  you should  thoroughly  review and
understand the effect of this document before signing it. Therefore, please take
this General Release Agreement home and carefully  consider it for at least five
days before signing it. In accordance with the requirements of the Older Workers
Benefit  Protection  Act, you are allowed at least 45 days from the date of your
receipt of this document and the accompanying explanatory letter to consider the
offer  made to you and to  return  an  executed  copy of this  form to the  Vice
President Administration.  Additionally,  after you have executed this form, you
have seven days to reconsider and revoke your agreement.

GENERAL RELEASE:  In consideration of my acceptance of the payments and benefits
offered to me under  Section  5(d)(2)(C) of the  Severance  Agreement,  I hereby
release and discharge Pioneer Natural Resources Company and its subsidiaries and
affiliates (the  "Company"),  and the officers,  directors,  employees,  agents,
successors,  and assigns of such entities  (collectively the "Released Parties")
from any and all claims,  liabilities,  demands,  and causes of action, known or
unknown, fixed or contingent,  which I have or claim against them as a result of
the  termination of my  employment,  including but not limited to claims arising
under  federal,  state,  or local laws  prohibiting  employment  discrimination,
including the Age Discrimination in Employment Act, or claims growing out of any
legal  restrictions,  contractual  or  otherwise,  on  the  Company's  right  to
terminate the employment of its  employees,  and I do hereby agree not to file a
lawsuit to assert such claims. I further acknowledge and agree that by accepting
the  Severance  Agreement  benefits,  I have  given  up my  right  to  file  any
complaint,  lawsuit,  or other legal action against any of the Released  Parties
growing out of,  connected  with, or relating in any way to my employment or the
termination of my employment with the Company.  Further in  consideration of the
payments and benefits offered to me under the Severance Agreement, I acknowledge
and agree that the  Released  Parties  may recover  from me any loss,  including
attorney's  fees and costs of  defending  against any claim  brought by me, that
they may suffer arising out of my breach of this General Release Agreement.

     I understand that this General Release Agreement is final and binding,  and
I  agree  not  to  challenge   its   enforceability.   If  I  do  challenge  the
enforceability of this General Release Agreement, I agree initially to tender to
the Company all money received pursuant to the Severance  Agreement,  and invite
the  Company  to retain  such  money and agree  with me to cancel  this  General
Release  Agreement.  In the event the Company  accepts  this offer,  the Company
shall retain such money and this General Release  Agreement will be void. In the
event the Company  does not accept such offer,  the Company  shall so notify me,
and shall place such money in an  interest-bearing  escrow  account  pending the
resolution of any dispute as to whether this General Release  Agreement shall be
set aside and/or otherwise be rendered unenforceable.

     I acknowledge and agree that the Company has no legal obligation to provide
the payment offered to me under Section  5(d)(2)(C) of the Severance  Agreement,
and my  acceptance  of the  obligations  and  attendant  additional  payment  as
described therein constitutes my agreement to all terms and conditions set forth
in this General Release Agreement,  and are in consideration of the promises and
undertakings  of the Company  pursuant  to the  Severance  Agreement.  I further
acknowledge and agree that for unemployment  compensation purposes, the payments
I receive under the Severance Agreement shall be considered  additional wages in
lieu  of  notice;  and  that,  accordingly,  I  may  be  ineligible  to  receive
unemployment compensation benefits for an equivalent period of time.

     This General Release  Agreement does not have any effect on any claim I may
have against the Released Parties  unrelated to the termination of my employment
or with  respect  to any  rights  or claims  that may arise  after the date this
General Release Agreement is executed.

     I have  carefully  read and fully  understand all of the provisions of this
General Release.  I further  acknowledge that entering into this General Release
Agreement is knowing and voluntary on my part, that I have had a reasonable time
to deliberate regarding its terms, and that I have had the right to consult with
an attorney if I so desired.




Date signed:
             ------------------            --------------------------------
                                           Signature of Officer

Date signed:
             ------------------            --------------------------------
                                           Signature of Officer




Exhibit A



Name                       Title                                             Location
- -----------------          -------------------------------------------       ------------------------
                                                                       
Richard P. Dealy           Executive Vice President and Chief Financial      Irving, Texas
Timothy L. Dove            President and Chief Operating Officer             Irving, Texas
Marcelo D. Guiscardo       Vice President - International                    Buenos Aires, Argentina
William F. Hannes          Vice President - Engineering and
                           Development                                       Irving, Texas
Darin Holderness           Vice President and Chief Accounting Officer       Irving, Texas
Frank E. Hopkins           Vice President - Investor Relations               Irving, Texas
David McManus              Vice President - International Operations         London, England
Susan A. Spratlen          Vice President - Corporate Communications         Irving, Texas
Jay P. Still               Vice President - Western Division                 Denver, Colorado