Exhibit 10.1

                        PIONEER NATURAL RESOURCES COMPANY

                            INDEMNIFICATION AGREEMENT



     This Agreement ("Agreement") is made and entered into as of the 15th day of
November,  2006, by and between Pioneer Natural  Resources  Company,  a Delaware
corporation (the "Company"), and Scott D. Sheffield ("Indemnitee").

                                    RECITALS

     A.  Highly  competent  and  experienced  persons  are  reluctant  to  serve
corporations as directors, executive officers or in other capacities unless they
are provided  with adequate  protection  through  insurance and  indemnification
against  claims and actions  against  them  arising out of their  service to and
activities on behalf of the Company.

     B. The Board of Directors of the Company (the "Board") has determined  that
the  inability to attract and retain such persons  would be  detrimental  to the
best interests of the Company and its  stockholders  and that the Company should
act to assure  such  persons  that there  will be  increased  certainty  of such
protection in the future.

     C. The  Board  has  also  determined  that it is  reasonable,  prudent  and
necessary for the Company, in addition to purchasing and maintaining  directors'
and  officers'   liability   insurance  (or  otherwise  providing  for  adequate
arrangements of  self-insurance),  contractually to obligate itself to indemnify
such persons to the fullest extent permitted by applicable law so that they will
serve or continue to serve the Company  free from undue  concern  that they will
not be adequately protected.

     D.  Indemnitee  is  willing  to  serve,  continue  to serve  and to take on
additional  service  for or on  behalf  of the  Company  on the  condition  that
Indemnitee be so indemnified to the fullest extent permitted by law.

     E. Article Twelfth of the Amended and Restated Certificate of Incorporation
of the Company  provides for  indemnification  of directors  and officers to the
fullest extent permitted by law.

     In   consideration  of  the  foregoing  and  the  mutual  covenants  herein
contained,  and other  good and  valuable  consideration,  the  sufficiency  and
receipt of which are hereby acknowledged, the parties hereby agree as follows:

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                                    ARTICLE I

                               Certain Definitions

     As used  herein,  the  following  words and terms shall have the  following
respective meanings (whether singular or plural):

     "Acquiring Person" means any Person other than (i) the Company, (ii) any of
the Company's Subsidiaries, (iii) any employee benefit plan of the Company or of
a Subsidiary of the Company or of a Company owned  directly or indirectly by the
stockholders  of the  Company in  substantially  the same  proportions  as their
ownership  of  stock of the  Company,  or (iv) any  trustee  or other  fiduciary
holding  securities  under  an  employee  benefit  plan of the  Company  or of a
Subsidiary  of the Company or of a Company  owned  directly or indirectly by the
stockholders  of the  Company in  substantially  the same  proportions  as their
ownership of stock of the Company.

     "Change in Control" means the occurrence of any of the following events:

     (i) The  acquisition  by any Person of  beneficial  ownership  (within  the
meaning  of Rule 13d-3  promulgated  under the  Exchange  Act) of 40% or more of
either  (x) the then  outstanding  shares of Common  Stock of the  Company  (the
"Outstanding Company Common Stock") or (y) the combined voting power of the then
outstanding  voting  securities of the Company entitled to vote generally in the
election of directors (the "Outstanding Company Voting  Securities");  provided,
however, that for purposes of this Subparagraph (i), the following  acquisitions
shall not constitute a Change of Control:  (A) any acquisition directly from the
Company, (B) any acquisition by the Company, (C) any acquisition by any employee
benefit plan (or related  trust)  sponsored or  maintained by the Company or any
corporation  controlled by the Company or (D) any acquisition by any corporation
pursuant to a  transaction  which  complies  with  clauses  (A),  (B) and (C) of
paragraph (iii) below; or

     (ii) Members of the  Incumbent  Board cease for any reason to constitute at
least a majority of the Board; or

     (iii) Consummation of a reorganization,  merger or consolidation or sale or
other disposition of all or substantially all of the assets of the Company or an
acquisition of assets of another corporation (a "Business Combination"), in each
case, unless, following such Business Combination,  (A) all or substantially all
of the individuals and entities who were the beneficial owners, respectively, of
the Outstanding  Company Common Stock and Outstanding  Company Voting Securities
immediately  prior to such Business  Combination  beneficially  own, directly or
indirectly,  more  than 50% of,  respectively,  the then  outstanding  shares of
common  stock  and the  combined  voting  power of the then  outstanding  voting
securities entitled to vote generally in the election of directors,  as the case
may be, of the corporation resulting from such Business Combination  (including,
without limitation, a corporation which as a result of such transaction owns the
Company or all or  substantially  all of the Company's assets either directly or
through one or more subsidiaries) in substantially the same proportions as their

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ownership,  immediately  prior to such Business  Combination of the  Outstanding
Company Common Stock and Outstanding Company Voting Securities,  as the case may
be, (B) no Person (excluding any employee benefit plan (or related trust) of the
Company  or  the   corporation   resulting   from  such  Business   Combination)
beneficially owns,  directly or indirectly,  40% or more of,  respectively,  the
then outstanding  shares of common stock of the corporation  resulting from such
Business Combination or the combined voting power of the then outstanding voting
securities of such corporation  except to the extent that such ownership results
solely  from  ownership  of the  Company  that  existed  prior  to the  Business
Combination and (C) at least a majority of the members of the board of directors
of the corporation  resulting from such Business Combination were members of the
Incumbent Board at the time of the execution of the initial agreement, or of the
action of the Board, providing for such Business Combination; or

     (iv) Approval by the stockholders of the Company of a complete  liquidation
or dissolution of the Company.

     "Claim"  means an actual or  threatened  claim or request for relief  which
was, is or may be made by reason of anything done or not done by Indemnitee  in,
or by reason of any  event or  occurrence  related  to,  Indemnitee's  Corporate
Status.

     "Corporate  Status"  means the status of a person who is,  becomes or was a
director, officer, employee, agent or fiduciary of the Company or is, becomes or
was  serving at the  request of the  Company as a  director,  officer,  partner,
venturer, proprietor, trustee, employee, agent, fiduciary or similar functionary
of another foreign or domestic  corporation,  partnership,  joint venture,  sole
proprietorship,  trust, employee benefit plan or other enterprise.  For purposes
of this Agreement,  the Company agrees that Indemnitee's service on behalf of or
with  respect  to any  Subsidiary  of the  Company  shall be deemed to be at the
request of the Company.

     "DGCL" means the Delaware General Corporation Law and any successor statute
thereto, as either of them may from time to time be amended.

     "Disinterested  Director"  with  respect to any request by  Indemnitee  for
indemnification  hereunder,  means a director  of the Company who at the time of
the vote is not a named  defendant or respondent in the Proceeding in respect of
which indemnification is sought by Indemnitee.

     "Exchange Act" means the Securities Exchange Act of 1934.

     "Expenses"  means  all  attorneys'  fees  and   disbursements,   retainers,
accountant's   fees   and   disbursements,   private   investigator   fees   and
disbursements,  court  costs,  transcript  costs,  fees and expenses of experts,
witness fees and expenses,  travel  expenses,  duplicating  costs,  printing and
binding costs, telephone charges,  postage,  delivery service fees and all other
disbursements, costs or expenses of the types customarily incurred in connection
with prosecuting,  defending (including affirmative defenses and counterclaims),
preparing  to  prosecute  or defend,  investigating,  being or preparing to be a
witness in, or  participating  in or preparing to  participate  in (including on
appeal) a Proceeding  and all interest or finance  charges  attributable  to any

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thereof.  Should any payments by the Company under this  Agreement be determined
to be subject to any federal,  state or local  income or excise tax,  "Expenses"
shall also include such amounts as are necessary to place Indemnitee in the same
after-tax  position (after giving effect to all applicable  taxes) as Indemnitee
would have been in had no such tax been determined to apply to such payments.

     "Incumbent  Board"  means  the  individuals  who,  as of the  date  of this
Agreement,  constitute the Board and any other individual who becomes a director
of the Company after that date and whose election or appointment by the Board or
nomination for election by the Company's  stockholders was approved by a vote of
at least a majority of the directors then  comprising the Incumbent  Board,  but
excluding,  for this purpose,  any such individual  whose initial  assumption of
office  occurs  as a result of an actual or  threatened  election  contest  with
respect to the election or removal of  directors  or other actual or  threatened
solicitation  of proxies or consents by or on behalf of a Person  other than the
Incumbent Board.

     "Independent  Counsel" means a law firm, or a member of a law firm, that is
experienced in matters of corporation law and neither  contemporaneously is, nor
in the five years theretofore has been,  retained to represent:  (a) the Company
or  Indemnitee  in any  matter  material  to either  such party  (other  than as
Independent Counsel under this Agreement or similar  agreements),  (b) any other
party to the Proceeding giving rise to a claim for indemnification  hereunder or
(c) the beneficial owner,  directly or indirectly,  of securities of the Company
representing  5% or more of the  combined  voting  power of the  Company's  then
outstanding  voting  securities  (other than, in each such case, with respect to
matters  concerning the rights of Indemnitee  under this Agreement,  or of other
indemnitees  under  similar  indemnification  agreements).  Notwithstanding  the
foregoing,  the term  "Independent  Counsel"  shall not  include any person who,
under the applicable  standards of professional  conduct then prevailing,  would
have a conflict of interest in representing  either the Company or Indemnitee in
an action to determine Indemnitee's rights under this Agreement.

     "Independent   Directors"  means  the  directors  on  the  Board  that  are
independent  directors as defined in Section 303A of the New York Stock Exchange
Listed Company Manual or successor provision,  or, if the Company's common stock
is not then quoted on the NYSE, that qualify as independent, disinterested, or a
similar  term as defined in the rules of the  principal  securities  exchange or
inter-dealer quotation system on which the Company's common stock is then listed
or quoted.

     "Person"  means any  individual,  entity or group  (within  the  meaning of
Sections 13(d)(3) and 14(d)(2) of the Exchange Act).

     "Potential  Change in Control"  shall be deemed to have occurred if (i) any
Person shall have announced publicly an intention to effect a Change in Control,
or  commenced  any action  (such as the  commencement  of a tender offer for the
Company's Common Stock or the solicitation of proxies for the election of any of
the Company's  directors)  that, if successful,  could reasonably be expected to
result in the occurrence of a Change in Control; (ii) the Company enters into an
agreement,  the consummation of which would  constitute a Change in Control;  or

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(iii) any other event occurs which the Board  declares to be a Potential  Change
of Control.

     "Proceeding"  means any  threatened,  pending or  completed  action,  suit,
arbitration,  investigation,  inquiry,  alternate dispute resolution  mechanism,
administrative  or  legislative  hearing,  or any other  proceeding  (including,
without limitation,  any securities laws action, suit, arbitration,  alternative
dispute resolution  mechanism,  hearing or procedure)  whether civil,  criminal,
administrative,  arbitrative  or  investigative  and  whether  or not based upon
events occurring, or actions taken, before the date hereof, and any appeal in or
related  to any  such  action,  suit,  arbitration,  investigation,  hearing  or
proceeding  and any  inquiry or  investigation  (including  discovery),  whether
conducted by or in the right of the Company or any other Person, that Indemnitee
in good  faith  believes  could  lead to any  such  action,  suit,  arbitration,
alternative dispute resolution mechanism,  hearing or other proceeding or appeal
thereof.

     "Subsidiary"  means,  with respect to any Person,  any corporation or other
entity of which a majority of the voting power of the voting  equity  securities
or equity interest is owned, directly or indirectly, by that Person.

     "Voting  Securities"  means  any  securities  that  vote  generally  in the
election of directors, in the admission of general partners, or in the selection
of any other similar governing body.

                                   ARTICLE II

                             Services by Indemnitee

     Indemnitee is serving as a officer of the Company. Indemnitee may from time
to time also agree to serve,  as the Company may request  from time to time,  in
another  capacity  for  the  Company  (including  another  officer  or  director
position) or as a director,  officer, partner,  venturer,  proprietor,  trustee,
employee, agent, fiduciary or similar functionary of another foreign or domestic
corporation,  partnership,  joint venture, sole proprietorship,  trust, employee
benefit plan or other  enterprise.  Indemnitee and the Company each  acknowledge
that they have entered into this Agreement as a means of inducing  Indemnitee to
serve, or continue to serve, the Company in such  capacities.  Indemnitee may at
any time and for any reason resign from such  position or positions  (subject to
any other contractual obligation or any obligation imposed by operation of law).
The Company shall have no obligation under this Agreement to continue Indemnitee
in any such position or positions.

                                   ARTICLE III

                                 Indemnification

     Section 3.1 General. Subject to the provisions set forth in Article IV, the
Company  shall  indemnify,  and advance  Expenses to,  Indemnitee to the fullest
extent  permitted  by  applicable  law in effect on the date  hereof and to such
greater  extent as applicable  law may hereafter  from time to time permit.  The
other  provisions set forth in this Agreement are provided in addition to and as

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a means of  furtherance  and  implementation  of, and not in limitation  of, the
obligations  expressed  in this  Article  III. No  requirement,  condition to or
limitation of any right to  indemnification  or to advancement of Expenses under
this Article III shall in any way limit the rights of  Indemnitee  under Article
VII.

     Section  3.2  Additional  Indemnity  of the  Company.  Indemnitee  shall be
entitled  to  indemnification  pursuant  to this  Section  3.2 if,  by reason of
anything  done or not  done by  Indemnitee  in,  or by  reason  of any  event or
occurrence  related to,  Indemnitee's  Corporate  Status,  Indemnitee is, was or
becomes,  or is  threatened  to be  made,  a  party  to,  or  witness  or  other
participant in any Proceeding. Pursuant to this Section 3.2, Indemnitee shall be
indemnified against any and all Expenses, judgments, penalties (including excise
or similar taxes), fines and amounts paid in settlement (including all interest,
assessments  and other charges paid or payable in connection  with or in respect
of  any  such  Expenses,  judgments,   penalties,  fines  and  amounts  paid  in
settlement)  actually and reasonably  incurred by Indemnitee or on  Indemnitee's
behalf in connection with such Proceeding or any Claim, issue or matter therein.
Notwithstanding the foregoing, the obligations of the Company under this Section
3.2 shall be subject to the condition that no determination  (which, in any case
in which  Independent  Counsel  is  involved,  shall  be in a form of a  written
opinion) shall have been made pursuant to Article IV that  Indemnitee  would not
be permitted to be indemnified under applicable law. Nothing in this Section 3.2
shall limit the benefits of Section 3.1 or any other Section hereunder.

     Section 3.3  Advancement of Expenses.  The Company shall pay all reasonable
Expenses  incurred  by, or in the case of  retainers  to be  incurred  by, or on
behalf of Indemnitee  (or, if applicable,  reimburse  Indemnitee for any and all
Expenses reasonably incurred by Indemnitee and previously paid by Indemnitee) in
connection  with any Claim or  Proceeding,  whether  brought  by the  Company or
otherwise,   in  advance  of  any   determination   respecting   entitlement  to
indemnification  pursuant to Article IV hereof  within 10 days after the receipt
by the Company of (a) a written request from Indemnitee  requesting such payment
or payments from time to time,  whether prior to or after final  disposition  of
such Proceeding,  and (b) a written  affirmation from Indemnitee of Indemnitee's
good faith belief that Indemnitee has met the standard of conduct  necessary for
Indemnitee  to be permitted to be  indemnified  under  applicable  law. Any such
payment by the Company is referred to in this Agreement as an "Expense Advance."
In  connection  with any request for an Expense  Advance,  if  requested  by the
Company,  Indemnitee  or  Indemnitee's  counsel  shall also submit an  affidavit
stating  that the  Expenses  incurred  were,  or in the case of  retainers to be
incurred are,  reasonable.  Any dispute as to the  reasonableness of any Expense
shall not delay an Expense  Advance by the Company,  and the Company agrees that
any such dispute  shall be resolved only upon the  disposition  or conclusion of
the underlying Claim against Indemnitee. Indemnitee hereby undertakes and agrees
that Indemnitee  will reimburse and repay the Company  without  interest for any
Expense  Advances to the extent that it shall  ultimately  be  determined  (in a
final  adjudication by a court from which there is no further right of appeal or
in a final adjudication of an arbitration  pursuant to Section 5.1 if Indemnitee
elects  to  seek  such  arbitration)  that  Indemnitee  is  not  entitled  to be
indemnified  by the  Company  against  such  Expenses.  Indemnitee  shall not be
required to provide collateral or otherwise secure the undertaking and agreement
described in the prior sentence.

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     Section 3.4  Indemnification  for  Additional  Expenses.  The Company shall
indemnify  Indemnitee  against  any and all  costs  and  expenses  (of the types
described  in the  definition  of Expenses in Article I) and,  if  requested  by
Indemnitee, shall (within two business days of that request) advance those costs
and expenses to Indemnitee,  that are incurred by Indemnitee in connection  with
any  claim  asserted   against,   or  action  brought  by,  Indemnitee  for  (i)
indemnification or an Expense Advance by the Company under this Agreement or any
other agreement or provision of the Company's  Certificate of  Incorporation  or
Bylaws now or  hereafter  in effect  relating to any Claim or  Proceeding,  (ii)
recovery  under  any  directors'  and  officers'  liability  insurance  policies
maintained by the Company,  or (iii)  enforcement of, or claims for breaches of,
any provision of this Agreement,  in each of the foregoing situations regardless
of  whether  Indemnitee   ultimately  is  determined  to  be  entitled  to  that
indemnification,  advance expense payment, insurance recovery,  enforcement,  or
damage  claim,  as the case may be and  regardless  of whether the nature of the
proceeding  with  respect  to such  matters  is  judicial,  by  arbitration,  or
otherwise.

     Section  3.5  Partial  Indemnity.  If  Indemnitee  is  entitled  under  any
provision  of this  Agreement  to  indemnification  by the Company for some or a
portion of the  Expenses,  judgments,  fines,  penalties,  and  amounts  paid in
settlement  of a Claim or  Proceeding  but not,  however,  for all of the  total
amount  thereof,  the Company shall  nevertheless  indemnify  Indemnitee for the
portion thereof to which Indemnitee is entitled.  Moreover,  notwithstanding any
other  provision  of this  Agreement,  to the extent  that  Indemnitee  has been
successful  on the  merits  or  otherwise  in  defense  of any or all  Claims or
Proceedings,  or in defense of any issue or matter therein,  including dismissal
without prejudice, Indemnitee shall be indemnified against all Expenses incurred
in connection therewith.

                                   ARTICLE IV

                   Procedure for Determination of Entitlement
                               to Indemnification

     Section 4.1 Request by  Indemnitee.  To obtain  indemnification  under this
Agreement,  Indemnitee shall submit to the Company a written request,  including
therein  or  therewith  such  documentation  and  information  as is  reasonably
available to Indemnitee and is reasonably  necessary to determine whether and to
what extent  Indemnitee  is entitled to  indemnification.  The  Secretary  or an
Assistant  Secretary  of the  Company  shall,  promptly  upon  receipt of such a
request for  indemnification,  advise the Board in writing that  Indemnitee  has
requested indemnification.

     Section 4.2  Determination  of Request.  Upon written request by Indemnitee
for  indemnification  pursuant to the first  sentence  of Section 4.1 hereof,  a
determination, if required by applicable law, with respect to whether Indemnitee
is permitted under applicable law to be indemnified  shall be made in accordance
with the terms of Section 4.5, in the specific case as follows:

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          (a) If a Potential Change in Control or a Change in Control shall have
     occurred,  by Independent Counsel (selected in accordance with Section 4.3)
     in a written opinion  to the Board and Indemnitee,  unless Indemnitee shall
     request that such determination be made by the Board, or a committee of the
     Board, in which case by the person or persons or in the manner provided for
     in clause (i) or (ii) of paragraph (b) below; or

          (b) If a Potential Change in  Control or a Change in Control shall not
     have occurred,  (i) by the  Board by a  majority vote  of the Disinterested
     Directors  even  though  less  than  a quorum  of the Board,  or (ii)  by a
     majority vote of a  committee solely of two or more Disinterested Directors
     designated to  act in the matter  by a majority  vote of all  Disinterested
     Directors  even though  less than  a quorum  of  the  Board,  or  (iii)  by
     Independent Counsel selected  by the Board or a committee of the Board by a
     vote as set forth in clauses (i) or  (ii) of this paragraph (b), or if such
     vote is  not obtainable or such a  committee  cannot  be established,  by a
     majority vote of  all directors,  or (iv)  if  Indemnitee  and  the Company
     agree,  by the  stockholders  of the  Company in a  vote that  excludes the
     shares held by directors who are not Disinterested Directors.

If it is so  determined  that  Indemnitee is permitted to be  indemnified  under
applicable  law,  payment to Indemnitee  shall be made within 10 days after such
determination.  Nothing  contained  in this  Agreement  shall  require  that any
determination  be made  under  this  Section  4.2  prior to the  disposition  or
conclusion of a Claim or Proceeding against Indemnitee;  provided, however, that
Expense  Advances shall  continue to be made by the Company  pursuant to, and to
the  extent  required  by,  the  provisions  of Article  III.  Indemnitee  shall
cooperate with the person or persons making such  determination  with respect to
Indemnitee's entitlement to indemnification,  including providing to such person
upon reasonable  advance request any  documentation  or information  that is not
privileged  or  otherwise  protected  from  disclosure  and  that is  reasonably
available to Indemnitee  and  reasonably  necessary to such  determination.  Any
costs or expenses  (including  attorneys'  fees and  disbursements)  incurred by
Indemnitee  in  so   cooperating   with  the  person  or  persons   making  such
determination  shall be borne by the Company  (irrespective of the determination
as to  Indemnitee's  entitlement  to  indemnification),  and the  Company  shall
indemnify and hold harmless Indemnitee therefrom.

     Section 4.3  Independent  Counsel.  If a  Potential  Change in Control or a
Change in Control shall not have occurred and the  determination  of entitlement
to indemnification is to be made by Independent Counsel, the Independent Counsel
shall be selected by (a) a majority vote of the  Disinterested  Directors,  even
though  less than a quorum  of the  Board or (b) if there  are no  Disinterested
Directors,  by a majority vote of the Board,  and the Company shall give written
notice  to  Indemnitee,   within  10  days  after  receipt  by  the  Company  of
Indemnitee's request for indemnification, specifying the identity and address of
the  Independent  Counsel so  selected.  If a  Potential  Change in Control or a
Change in Control shall have occurred and the  determination  of  entitlement to
indemnification is to be made by Independent  Counsel,  the Independent  Counsel
shall be selected by Indemnitee, and Indemnitee shall give written notice to the
Company,   within  10  days  after   submission  of  Indemnitee's   request  for
indemnification,  specifying the identity and address of the Independent Counsel
so selected (unless  Indemnitee shall request that such selection be made by the

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Disinterested  Directors or a committee of the Board, in which event the Company
shall  give  written  notice to  Indemnitee  within  10 days  after  receipt  of
Indemnitee's request for the Board or a committee of the Disinterested Directors
to make such  selection,  specifying the identity and address of the Independent
Counsel so  selected).  In either  event,  (i) such notice to  Indemnitee or the
Company,  as the case may be, shall be accompanied  by a written  affirmation of
the  Independent  Counsel so selected that it satisfies the  requirements of the
definition of "Independent  Counsel" in Article I and that it agrees to serve in
such  capacity  and (ii)  Indemnitee  or the  Company,  as the case may be, may,
within seven days after such written notice of selection  shall have been given,
deliver to the Company or to Indemnitee, as the case may be, a written objection
to such selection. Any objection to selection of Independent Counsel pursuant to
this Section 4.3 may be asserted only on the ground that the Independent Counsel
so selected does not meet the  requirements  of the  definition of  "Independent
Counsel" in Article I, and the objection shall set forth with  particularity the
factual basis of such assertion.  If such written  objection is timely made, the
Independent  Counsel so selected may not serve as Independent Counsel unless and
until a court of competent  jurisdiction  (the "Court") has determined that such
objection  is without  merit.  In the event of a timely  written  objection to a
choice of Independent  Counsel,  the party originally  selecting the Independent
Counsel  shall have seven days to make an  alternate  selection  of  Independent
Counsel and to give written notice of such  selection to the other party,  after
which time such other party shall have five days to make a written  objection to
such alternate  selection.  If, within 30 days after  submission of Indemnitee's
request for  indemnification  pursuant to Section  4.1, no  Independent  Counsel
shall have been  selected and not objected to,  either the Company or Indemnitee
may petition the Court for resolution of any objection that shall have been made
by the Company or Indemnitee  to the other's  selection of  Independent  Counsel
and/or for the  appointment as Independent  Counsel of a person  selected by the
Court or by such other person as the Court shall designate,  and the person with
respect to whom an objection is so resolved or the person so appointed shall act
as  Independent  Counsel  under  Section 4.2. The Company  shall pay any and all
reasonable fees and expenses incurred by such Independent  Counsel in connection
with acting  pursuant to Section 4.2, and the Company  shall pay all  reasonable
fees and expenses incident to the procedures of this Section 4.3,  regardless of
the manner in which such Independent Counsel was selected or appointed. Upon the
due commencement of any judicial  proceeding or arbitration  pursuant to Section
5.1,  Independent  Counsel  shall be  discharged  and  relieved  of any  further
responsibility  in  such  capacity  (subject  to  the  applicable  standards  of
professional conduct then prevailing).

     Section 4.4 Establishment of a Trust. In the event of a Potential Change in
Control or a Change in  Control,  the Company  shall,  upon  written  request by
Indemnitee,  create a trust for the benefit of Indemnitee (the "Trust") and from
time to time upon  written  request  of  Indemnitee  shall  fund the Trust in an
amount sufficient to satisfy any and all Expenses reasonably  anticipated at the
time of each such  request to be  incurred  in  connection  with  investigating,
preparing  for,  and  defending  any Claim,  and any and all  judgments,  fines,
penalties,  and  settlement  amounts  of any and all  Claims  from  time to time
actually paid or claimed,  reasonably  anticipated,  or proposed to be paid. The
amount to be deposited in the Trust pursuant to the foregoing funding obligation
shall be determined by the Independent  Counsel (or other  person(s)  making the
determination of whether Indemnitee is permitted to be indemnified by applicable
law). The terms of the Trust shall provide that,  upon a Change in Control,  (i)
the Trust shall not be revoked or the  principal  thereof  invaded,  without the

                                       9





written  consent of  Indemnitee;  (ii) the trustee of the Trust  shall  advance,
within ten  business  days of a request by  Indemnitee,  any and all  reasonable
Expenses to Indemnitee, any required determination concerning the reasonableness
of the Expenses to be made by the  Independent  Counsel (and  Indemnitee  hereby
agrees to reimburse the Trust under the  circumstances in which Indemnitee would
be required to reimburse the Company for Expenses  Advances under Section 3.3 of
this  Agreement);  (iii) the Trust shall continue to be funded by the Company in
accordance with the funding  obligation set forth above; (iv) the trustee of the
Trust shall promptly pay to Indemnitee all amounts for which Indemnitee shall be
entitled to indemnification  pursuant to this Agreement;  and (v) all unexpended
funds in the Trust shall revert to the Company upon a final determination by the
Independent  Counsel or a court of competent  jurisdiction,  as the case may be,
that  Indemnitee has been fully  indemnified  under the terms of this Agreement.
The  trustee  of the  Trust  shall  be  chosen  by  Indemnitee  and  shall be an
institution that is not affiliated with Indemnitee.  Nothing in this Section 4.4
shall relieve the Company of any of its obligations under this Agreement.

     Section 4.5       Presumptions and Effect of Certain Proceedings.

          (a) Indemnitee  shall be  presumed to be  entitled to  indemnification
     under this Agreement upon submission of a request for indemnification under
     Section 4.1,  and the Company shall have the  burden of proof in overcoming
     that presumption in reaching a  determination contrary to that presumption.
     Such presumption shall be used by Independent  Counsel (or other  person or
     persons  determining  entitlement  to  indemnification) as a  basis  for  a
     determination of entitlement to indemnification unless the Company provides
     information sufficient to overcome such presumption by clear and convincing
     evidence or unless  the investigation,  review and analysis  of Independent
     Counsel (or such other person or persons)  convinces Independent Counsel by
     clear and convincing evidence that the presumption should not apply.

          (b) If the person or persons empowered or selected under Article IV of
     this  Agreement   to   determine   whether   Indemnitee   is  entitled   to
     indemnification  shall not  have made a  determination within 60 days after
     receipt by the Company of the request by Indemnitee therefor, the requisite
     determination of  entitlement to  indemnification  shall be  deemed to have
     been made  and  Indemnitee  shall  be  entitled  to  such  indemnification;
     provided, however, that such 60-day period may be extended for a reasonable
     time,  not to  exceed  an additional  30 days,  if  the  person  making the
     determination with respect to entitlement to  indemnification in good faith
     requires  such  additional  time   for  the  obtaining   or  evaluating  of
     documentation  and/or  information  relating  to  such  determination;  and
     provided, further,  that the  60-day limitation  set forth  in this Section
     4.5(b) shall  not apply and such  period shall be extended as necessary (i)
     if  within  30  days  after  receipt  by  the  Company  of  the request for
     indemnification under Section 4.1  Indemnitee and the Company have  agreed,
     and the Board has resolved to submit such determination to the stockholders
     of the  Company pursuant to  Section 4.2(b)  for  their consideration at an
     annual meeting  of  stockholders  to  be  held  within  90 days  after such
     agreement and such  determination is made thereat, or a  special meeting of
     stockholders is called within 30 days after such receipt for the purpose of

                                       10





     making such determination,  such meeting is held for such purpose within 60
     days after having been so called and such determination is made thereat, or
     (ii) if the  determination of entitlement to  indemnification is to be made
     by Independent  Counsel  pursuant to  Section 4.2(a) of this  Agreement, in
     which case the applicable period shall be as set forth in Section 5.1(c).

          (c) The termination of any Proceeding or of any Claim, issue or matter
     by judgment, order,  settlement (whether with or without court approval) or
     conviction,  or upon a plea of nolo contendere or its equivalent, shall not
     (except as  otherwise expressly  provided  in  this  Agreement)  by  itself
     adversely affect the  rights of Indemnitee to  indemnification  or create a
     presumption  that  Indemnitee  failed to  meet any  particular  standard of
     conduct,  that Indemnitee had any  particular belief,  or that a  court has
     determined  that  indemnification  is  not  permitted  by  applicable  law.
     Indemnitee  shall be  deemed to have  been found  liable in respect  of any
     Claim, issue or matter only after Indemnitee shall have been so adjudged by
     the Court after exhaustion of all appeals therefrom.

                                    ARTICLE V

                         Certain Remedies of Indemnitee

     Section 5.1 Indemnitee Entitled to Adjudication in an Appropriate Court. If
(a) a  determination  is made  pursuant  to  Article IV that  Indemnitee  is not
entitled to indemnification under this Agreement; (b) there has been any failure
by the  Company  to make  timely  payment  or  advancement  of any  amounts  due
hereunder  (including,  without  limitation,  any Expense Advances);  or (c) the
determination  of  entitlement to  indemnification  is to be made by Independent
Counsel pursuant to Section 4.2 and such determination  shall not have been made
and delivered in a written  opinion  within 90 days after the latest of (i) such
Independent  Counsel's  being  appointed,  (ii) the  overruling  by the Court of
objections to such counsel's  selection,  or (iii) expiration of all periods for
the Company or  Indemnitee  to object to such  counsel's  selection,  Indemnitee
shall be entitled to commence an action seeking an  adjudication in the Court of
Indemnitee's  entitlement to such indemnification or advancements due hereunder,
including, without limitation, Expense Advances.  Alternatively,  Indemnitee, at
Indemnitee's  option,  may seek an award in  arbitration  to be  conducted  by a
single arbitrator  pursuant to the commercial  arbitration rules of the American
Arbitration  Association.  Indemnitee  shall  commence  such  action  seeking an
adjudication  or an award in  arbitration  within 180 days following the date on
which  Indemnitee  first has the right to commence such action  pursuant to this
Section  5.1,  or such right  shall  expire.  The  Company  agrees not to oppose
Indemnitee's right to seek any such adjudication or award in arbitration.

     Section 5.2 Adverse Determination Not to Affect any Judicial Proceeding. If
a  determination  shall have been made pursuant to Article IV that Indemnitee is
not entitled to indemnification under this Agreement, any judicial proceeding or
arbitration  commenced  pursuant  to this  Article V shall be  conducted  in all
respects as a de novo trial or arbitration on the merits,  and Indemnitee  shall
not be  prejudiced  by  reason of such  initial  adverse  determination.  In any
judicial  proceeding  or  arbitration  commenced  pursuant  to this  Article  V,

                                       11





Indemnitee shall be presumed to be entitled to indemnification or advancement of
Expenses,  as the case may be, under this  Agreement  and the Company shall have
the  burden of proof in  overcoming  such  presumption  and to show by clear and
convincing  evidence  that  Indemnitee  is not  entitled to  indemnification  or
advancement of Expenses, as the case may be.

     Section 5.3 Company Bound by  Determination  Favorable to Indemnitee in any
Judicial  Proceeding or Arbitration.  If a determination shall have been made or
deemed to have been made  pursuant to Article IV that  Indemnitee is entitled to
indemnification, the Company shall be irrevocably bound by such determination in
any judicial proceeding or arbitration commenced pursuant to this Article V, and
shall be precluded from asserting that such  determination  has not been made or
that the procedure by which such  determination  was made is not valid,  binding
and enforceable.

     Section 5.4 Company Bound by the Agreement.  The Company shall be precluded
from asserting in any judicial  proceeding or arbitration  commenced pursuant to
this Article V that the  procedures and  presumptions  of this Agreement are not
valid,  binding and  enforceable and shall stipulate in any such court or before
any such  arbitrator  that the  Company is bound by all the  provisions  of this
Agreement.

                                   ARTICLE VI

                                  Contribution

     Section  6.1  Contribution  Payment.  To  the  extent  the  indemnification
provided for under any provision of this  Agreement is determined (in the manner
hereinabove  provided)  not to be permitted  under  applicable  law, then in the
event Indemnitee was, is, or becomes a party to or witness or other  participant
in, or is threatened to be made a party to or witness or other participant in, a
Proceeding  by  reason of (or  arising  in part out of)  Indemnitee's  Corporate
Status, the Company, in lieu of indemnifying Indemnitee, shall contribute to the
amount of any and all Expenses,  judgments, fines, or penalties assessed against
or incurred or paid by Indemnitee on account of such  Proceeding and any and all
amounts  paid  in  settlement  of  that  Proceeding   (including  all  interest,
assessments,  and other charges paid or payable in connection with or in respect
of such Expenses,  judgments,  fines,  penalties, or amounts paid in settlement)
for which such  indemnification is not permitted  ("Contribution  Amounts"),  in
such  proportion as is appropriate to reflect the relative fault with respect to
the subject matter of the Proceeding giving rise to the Contribution  Amounts of
Indemnitee,  on the one hand,  and of the Company and any and all other  parties
(including  officers and directors of the Company other than Indemnitee) who may
be at fault with respect to such matter  (collectively,  including  the Company,
the "Third Parties") on the other hand.

     Section 6.2 Relative  Fault.  The relative  fault of the Third  Parties and
Indemnitee  shall  be  determined  (i) by  reference  to the  relative  fault of
Indemnitee as determined by the court or other governmental agency assessing the
Contribution  Amounts  or (ii) to the extent  such  court or other  governmental
agency does not apportion  relative fault,  by the Independent  Counsel (or such
other party which makes a  determination  under  Article IV) after giving effect

                                       12





to, among other things, the relative intent,  knowledge,  access to information,
and  opportunity to prevent or correct the subject matter of the Proceedings and
other  relevant  equitable   considerations  of  each  party.  The  Company  and
Indemnitee  agree  that it  would  not be just  and  equitable  if  contribution
pursuant to this Section 6.2 were  determined  by pro rata  allocation or by any
other  method  of   allocation   which  does  take  account  of  the   equitable
considerations referred to in this Section 6.2.

                                   ARTICLE VII

                                  Miscellaneous

     Section  7.1   Non-Exclusivity.   The  rights  of   Indemnitee  to  receive
indemnification  and  advancement of Expenses  under this Agreement  shall be in
addition to, and shall not be deemed  exclusive of, any other rights  Indemnitee
shall  under the DGCL or other  applicable  law,  the  charter  or bylaws of the
Company, any other agreement, vote of stockholders or a resolution of directors,
or otherwise. No amendment or alteration of the charter or bylaws of the Company
or any provision  thereof shall adversely affect  Indemnitee's  rights hereunder
and such rights shall be in addition to any rights Indemnitee may have under the
charter,  bylaws and the DGCL or other  applicable law. To the extent that there
is a change in the DGCL or other  applicable law (whether by statute or judicial
decision)  that  allows  greater  indemnification  by  agreement  than  would be
afforded currently under the Company's charter or bylaws and this Agreement,  it
is the intent of the  parties  hereto that  Indemnitee  shall enjoy by virtue of
this  Agreement the greater  benefit so afforded by such change.  Any amendment,
alteration or repeal of the DGCL that adversely  affects any right of Indemnitee
shall be  prospective  only and shall not limit or eliminate any such right with
respect to any Proceeding  involving any occurrence or alleged occurrence of any
action or omission to act that took place before such amendment or repeal.

     Section 7.2       Insurance and Subrogation.

          (a) To the extent  that the Company  maintains an  insurance policy or
     policies providing liability insurance for directors, officers,  employees,
     agents or  fiduciaries  of the  Company or  for individuals  serving at the
     request of  the  Company  as  directors,  officers,   partners,  venturers,
     proprietors,   trustees,   employees,   agents,   fiduciaries  or   similar
     functionaries of  another  foreign or  domestic  corporation,  partnership,
     joint venture, sole  proprietorship,  trust, employee benefit plan or other
     enterprise,  Indemnitee  shall be  covered  by such  policy or  policies in
     accordance with  its or their  terms to  the maximum extent of the coverage
     available  for any such director,  officer,  employee,  agent or  fiduciary
     under such policy or policies.

          (b) In the event  of any  payment by the Company under this Agreement,
     the Company shall be subrogated to the extent of such payment to all of the
     rights of recovery of Indemnitee, who shall execute all papers required and
     take all action  necessary to  secure such  rights,  including execution of
     such documents  as are  necessary  to enable  the Company to  bring suit to
     enforce such rights.

                                       13






          (c) The Company  shall not be liable  under this Agreement to make any
     payment of amounts otherwise  indemnifiable hereunder if  and to the extent
     that  Indemnitee  has otherwise actually  received such  payment  under the
     Company's charter or bylaws or any insurance policy, contract, agreement or
     otherwise.

          (d) If  Indemnitee  is a director  of  the Company,  the Company  will
     advise the Board of  any proposed  material  reduction in the  coverage for
     Indemnitee  to be  provided  by  the  Company's  directors'  and  officers'
     liability  insurance  policy  and will  not  effect  such a  reduction with
     respect to Indemnitee  without  the prior approval of  at least  80% of the
     Independent Directors of the Company.

          (e) If Indemnitee is a director of the Company during the term of this
     Agreement and if Indemnitee ceases  to be a director of the Company for any
     reason,  the Company  shall  procure a  run-off  directors'  and  officers'
     liability  insurance policy with  respect to  claims arising  from facts or
     events that occurred before  the time Indemnitee ceased to be a director of
     the Company  and covering  Indemnitee,  which policy,  without any lapse in
     coverage, will provide coverage  for a period  of six years  after the time
     Indemnitee ceased to be a director of the Company and will provide coverage
     (including  amount and  type of  coverage and size of deductibles) that are
     substantially  comparable   to  the  Company's   directors'  and  officers'
     liability insurance policy that was most protective of Indemnitee in the 12
     months  preceding  the time  Indemnitee  ceased  to be  a  director  of the
     Company; provided, however, that:

               (i) this  obligation  shall  be   suspended  during  the   period
          immediately following the time  Indemnitee ceases  to be a director of
          the Company if  and  only so long  as the Company has a directors' and
          officers' liability insurance policy in effect covering Indemnitee for
          such claims that,  if it were a run-off  policy,  would meet or exceed
          the foregoing standards, but in any event this suspension period shall
          end when a Change in Control occurs; and

               (ii) no later  than the end of the  suspension period provided in
          the preceding clause (i) (whether because of  failure to have a policy
          meeting  the  foregoing  standards  or  because  a  Change in  Control
          occurs), the Company shall procure a run-off  directors' and officers'
          liability insurance policy meeting the foregoing standards and lasting
          for the remainder of the six-year period.

          (f)  Notwithstanding   the   preceding   clause   (e)  including   the
     suspension  provisions therein,  if Indemnitee  ceases to be  an officer or
     director of the  Company in  connection with a  Change in Control  or at or
     during  the  one-year  period  following  the  occurrence of  a  Change  in
     Control, the Company  shall  procure  a  run-off  directors' and  officers'
     liability  insurance policy covering Indemnitee  and meeting  the foregoing
     standards  in  clause (e) and  lasting  for  a  six-year  period  upon  the
     Indemnitee's  ceasing to be  an officer or director  of the Company in such
     circumstances.

                                       14





     Section 7.3 Self Insurance of the Company; Other Arrangements.  The parties
hereto  recognize that the Company may, but except as provided in Section 7.2(d)
and Section  7.2(e) is not required to,  procure or maintain  insurance or other
similar  arrangements,  at its  expense,  to  protect  itself  and  any  person,
including  Indemnitee,  who is or was a director,  officer,  employee,  agent or
fiduciary  of the Company or who is or was serving at the request of the Company
as a director, officer, partner, venturer, proprietor, trustee, employee, agent,
fiduciary or similar  functionary  of another  foreign or domestic  corporation,
partnership, joint venture, sole proprietorship, trust, employee benefit plan or
other  enterprise  against any expense,  liability or loss  asserted  against or
incurred  by such  person,  in such a capacity  or arising  out of the  person's
status as such a person,  whether  or not the  Company  would  have the power to
indemnify such person against such expense or liability or loss.

     Except as provided in Section 7.2(d) and Section 7.2(e), in considering the
cost and  availability of such insurance,  the Company  (through the exercise of
the business  judgment of its directors  and  officers)  may, from time to time,
purchase  insurance which provides for certain (i)  deductibles,  (ii) limits on
payments required to be made by the insurer,  or (iii) coverage which may not be
as  comprehensive  as that  previously  included in  insurance  purchased by the
Company or its predecessors. The purchase of insurance with deductibles,  limits
on  payments  and  coverage  exclusions,  even if in the  best  interest  of the
Company,  may not be in the best  interest  of  Indemnitee.  As to the  Company,
purchasing   insurance  with  deductibles,   limits  on  payments  and  coverage
exclusions  is similar to the  Company's  practice  of  self-insurance  in other
areas.  In order to  protect  Indemnitee  who would  otherwise  be more fully or
entirely  covered under such policies,  the Company shall, to the maximum extent
permitted by  applicable  law,  indemnify  and hold  Indemnitee  harmless to the
extent (i) of such deductibles,  (ii) of amounts exceeding  payments required to
be made by an insurer, or (iii) of amounts that prior policies of directors' and
officers'  liability  insurance  held by the  Company or its  predecessors  have
provided  for  payment to  Indemnitee,  if by reason of  Indemnitee's  Corporate
Status Indemnitee is or is threatened to be made a party to any Proceeding.  The
obligation of the Company in the preceding  sentence  shall be without regard to
whether the Company  would  otherwise be required to  indemnify  such officer or
director  under  the  other  provisions  of this  Agreement,  or under  any law,
agreement,  vote of  stockholders  or  directors or other  arrangement.  Without
limiting the  generality of any provision of this  Agreement,  the procedures in
Article IV hereof  shall,  to the  extent  applicable,  be used for  determining
entitlement to indemnification under this Section 7.3.

     Section  7.4  Certain  Settlement  Provisions.  The  Company  shall have no
obligation  to indemnify  Indemnitee  under this  Agreement  for amounts paid in
settlement of a Proceeding or Claim without the Company's prior written consent.
The Company  shall not settle any  Proceeding  or Claim in any manner that would
impose any fine or other  obligation on Indemnitee  without  Indemnitee's  prior
written consent.  Neither the Company nor Indemnitee shall unreasonably withhold
their consent to any proposed settlement.

     Section 7.5 Duration of Agreement.  This  Agreement  shall  continue for so
long as Indemnitee serves as a director,  officer,  employee, agent or fiduciary
of the  Company  or, at the  request of the  Company,  as a  director,  officer,
partner,  venturer,  proprietor,  trustee, employee, agent, fiduciary or similar
functionary  of another  foreign or  domestic  corporation,  partnership,  joint


                                       15





venture, sole proprietorship,  trust, employee benefit plan or other enterprise,
and thereafter shall survive until and terminate upon the later to occur of: (a)
the  expiration  of 20 years  after the latest date that  Indemnitee  shall have
ceased to serve in any such capacity;  (b) the final  termination of all pending
Proceedings in respect of which Indemnitee is granted rights of  indemnification
or  advancement  of  Expenses  hereunder  and of  any  proceeding  commenced  by
Indemnitee pursuant to Article IV relating thereto; or (c) the expiration of all
statutes of limitation applicable to possible Claims arising out of Indemnitee's
Corporate Status.

     Section  7.6 Notice by Each Party.  Indemnitee  shall  promptly  notify the
Company in writing  upon being  served  with any  summons,  citation,  subpoena,
complaint,  indictment,  information or other document or communication relating
to  any   Proceeding  or  Claim  for  which   Indemnitee   may  be  entitled  to
indemnification or advancement of Expenses hereunder;  provided,  however,  that
any failure of Indemnitee  to so notify the Company  shall not adversely  affect
Indemnitee's  rights under this Agreement except to the extent the Company shall
have been materially  prejudiced as a direct result of such failure. The Company
shall promptly notify Indemnitee in writing as to the pendency of any Proceeding
or Claim that may involve a claim against Indemnitee for which Indemnitee may be
entitled to indemnification or advancement of Expenses hereunder.

     Section 7.7 Amendment. This Agreement may not be modified or amended except
by a written instrument executed by or on behalf of each of the parties hereto.

     Section 7.8 Waivers.  The  observance of any term of this  Agreement may be
waived (either generally or in a particular instance and either retroactively or
prospectively)  by the party  entitled  to  enforce  such term only by a writing
signed  by the  party  against  which  such  waiver  is to be  asserted.  Unless
otherwise expressly provided herein, no delay on the part of any party hereto in
exercising  any right,  power or privilege  hereunder  shall operate as a waiver
thereof,  nor shall any  waiver  on the part of any party  hereto of any  right,
power or privilege  hereunder  operate as a waiver of any other right,  power or
privilege hereunder nor shall any single or partial exercise of any right, power
or privilege  hereunder  preclude any other or further  exercise  thereof or the
exercise of any other right, power or privilege hereunder.

     Section 7.9 Entire  Agreement.  This Agreement and the documents  expressly
referred to herein  constitute the entire  agreement  between the parties hereto
with  respect  to  the  matters   covered   hereby,   and  any  other  prior  or
contemporaneous oral or written understandings or agreements with respect to the
matters covered hereby are expressly superseded by this Agreement.

     Section 7.10  Severability.  If any provision of this Agreement  (including
any provision within a single section, paragraph or sentence) or the application
of such provision to any Person or circumstance, shall be judicially declared to
be invalid,  unenforceable  or void,  such  decision will not have the effect of
invalidating   or  voiding  the  remainder  of  this  Agreement  or  affect  the
application  of such provision to other Persons or  circumstances,  it being the
intent and agreement of the parties that this Agreement  shall be deemed amended
by modifying  such provision to the extent  necessary to render it valid,  legal

                                       16





and  enforceable  while  preserving its intent,  or if such  modification is not
possible,  by substituting  therefor another provision that is valid,  legal and
unenforceable  and  that  achieves  the same  objective.  Any  such  finding  of
invalidity  or  unenforceability  shall  not  prevent  the  enforcement  of such
provision  in  any  other  jurisdiction  to  the  maximum  extent  permitted  by
applicable law.

     Section 7.11 Notices. All notices and other communications  hereunder shall
be in writing and shall be deemed given upon (a) transmitter's confirmation of a
receipt of a  facsimile  transmission  if during  normal  business  hours of the
recipient,  otherwise  on the next  business  day, (b)  confirmed  delivery of a
standard  overnight  courier or when  delivered by hand or (c) the expiration of
five business days after the date mailed by certified or registered mail (return
receipt  requested),  postage prepaid, to the parties at the following addresses
(or at such other addresses for a party as shall be specified by like notice):

         If to the Company, to it at:

                  Pioneer Natural Resources Company
                  5205 North O'Connor Blvd.
                  Suite 900
                  Irving, Texas  75039-3746
                  Attn: Corporate Secretary
                  Facsimile:  (972) 969-3552

         If to Indemnitee, to Indemnitee at:

                  5205 North O'Connor Blvd.
                  Suite 900
                  Irving, Texas  75039-3746

or to such other  address or to such other  individuals  as any party shall have
last  designated  by  notice  to  the  other  parties.  All  notices  and  other
communications  given to any party in  accordance  with the  provisions  of this
Agreement  shall be deemed  to have been  given  when  delivered  or sent to the
intended  recipient thereof in accordance with and as provided in the provisions
of this Section 7.11.

     Section 7.12 Governing Law. This Agreement shall be construed in accordance
with and  governed  by the laws of the State of Delaware  without  regard to the
principles of conflict of laws.

     Section 7.13      Certain Construction Rules.

              (a) The article and  section headings contained  in this Agreement
     are for reference purposes only and shall not affect in any way the meaning
     or  interpretation  of this  Agreement.  As used in this Agreement,  unless
     otherwise  provided to the  contrary,  (1) all  references to days shall be
     deemed references to calendar  days and (2) any reference to a "Section" or
     "Article"  shall  be  deemed  to  refer  to a  section  or article  of this

                                       17





     Agreement.  The  words  "hereof,"  "herein"  and  "hereunder" and  words of
     similar import  referring to  this Agreement refer  to this  Agreement as a
     whole and not to any particular provision  of this Agreement.  Whenever the
     words "include," "includes" or "including" are used in this Agreement, they
     shall be  deemed to be  followed by the words  "without limitation." Unless
     otherwise  specifically  provided for  herein,  the term "or"  shall not be
     deemed to be  exclusive. Whenever the context may require, any pronoun used
     in this Agreement  shall include the  corresponding masculine,  feminine or
     neuter forms,  and the  singular form  of nouns,  pronouns and  verbs shall
     include the plural and vice versa.

              (b)  For  purposes  of   this  Agreement,  references  to   "other
     enterprises"  shall  include employee benefit plans;  references to "fines"
     shall include  any excise  taxes assessed on  a person with  respect to any
     employee  benefit plan;  references  to  "serving  at  the  request  of the
     Company" shall  include any service  as a  director,  officer,  employee or
     agent of the Company which imposes duties on, or involves services by, such
     director, nominee, officer,  employee or agent with  respect to an employee
     benefit plan, its participants or beneficiaries;  and a person who acted in
     good faith and in  a manner  the person  reasonably  believed to  be in the
     interests of the participants and beneficiaries of an employee benefit plan
     shall be deemed to have acted in a manner "not opposed to the best interest
     of the Company" for purposes of this Agreement and the DGCL.

     Section 7.14  Counterparts.  This  Agreement may be executed in two or more
counterparts,  each of which shall be deemed to be an original  and all of which
together shall be deemed to be one and the same instrument, notwithstanding that
both parties are not signatories to the original or same counterpart.

     Section   7.15   Certain   Persons   Not   Entitled   to   Indemnification.
Notwithstanding  any other  provision of this  Agreement (but subject to Section
7.1),  Indemnitee  shall not be entitled to  indemnification  or  advancement of
Expenses  pursuant to the terms of this Agreement with respect to any Proceeding
or any Claim, issue or matter therein, brought or made by Indemnitee against the
Company,  except as specifically  provided in Article III, Article IV or Section
7.3. In addition,  the Company  shall not be obligated  pursuant to the terms of
this Agreement:

          (a) To indemnify  Indemnitee  if  (and to  the  extent  that) a  final
     decision by a court or  arbitration body  having jurisdiction in the matter
     shall determine that such indemnification is not lawful; or

          (b) To indemnify  Indemnitee for the payment to the Company of profits
     pursuant to  Section 16(b)  of the  Exchange Act,  or Expenses  incurred by
     Indemnitee for  Proceedings in connection  with such payment  under Section
     16(b) of the Exchange Act.

     Section 7.16 Indemnification for Negligence, Gross Negligence, etc. Without
limiting the  generality  of any other  provision  hereunder,  it is the express
intent of this Agreement that Indemnitee be indemnified and Expenses be advanced
regardless of Indemnitee's acts of negligence, gross negligence,  intentional or

                                       18





willful  misconduct  to the  extent  that  indemnification  and  advancement  of
Expenses is allowed pursuant to the terms of this Agreement and under applicable
law.

     Section  7.17  Mutual  Acknowledgments.  Both the  Company  and  Indemnitee
acknowledge  that in certain  instances,  applicable law  (including  applicable
federal law that may preempt or override  applicable state law) or public policy
may prohibit the Company from indemnifying the directors,  officers,  employees,
agents or  fiduciaries  of the Company under this  Agreement or  otherwise.  For
example,  the Company and Indemnitee  acknowledge  that the U.S.  Securities and
Exchange  Commission has taken the position that  indemnification  of directors,
officers and controlling  Persons of the Company for  liabilities  arising under
federal securities laws is against public policy and, therefore,  unenforceable.
Indemnitee  understands and acknowledges  that the Company has undertaken or may
be  required  in the  future  to  undertake  with the  Securities  and  Exchange
Commission  to submit  the  question  of  indemnification  to a court in certain
circumstances  for a determination of the Company's right under public policy to
indemnify Indemnitee.  In addition,  the Company and Indemnitee acknowledge that
federal law prohibits  indemnifications  for certain  violations of the Employee
Retirement Income Security Act of 1974, as amended.

     Section 7.18  Enforcement.  The Company  agrees that its  execution of this
Agreement shall constitute a stipulation by which it shall be irrevocably  bound
in any court or arbitration in which a proceeding by Indemnitee for  enforcement
of  Indemnitee's  rights  hereunder  shall  have been  commenced,  continued  or
appealed,  that its  obligations  set forth in this  Agreement  are  unique  and
special,  and that failure of the Company to comply with the  provisions of this
Agreement will cause  irreparable  and  irremediable  injury to Indemnitee,  for
which a remedy at law will be inadequate.  As a result, in addition to any other
right or remedy  Indemnitee  may have at law or in equity with respect to breach
of this  Agreement,  Indemnitee  shall be entitled to  injunctive  or  mandatory
relief directing  specific  performance by the Company of its obligations  under
this  Agreement.  The  Company  agrees  not to seek,  and  agrees  to waive  any
requirement  for  the  securing  or  posting  of,  a  bond  in  connection  with
Indemnitee's seeking or obtaining such relief.

     Section 7.19  Successors  and Assigns.  All of the terms and  provisions of
this Agreement shall be binding upon, shall inure to the benefit of and shall be
enforceable  by the parties  hereto and their  respective  successors,  assigns,
heirs, executors, administrators, legal representatives.

     Section 7.20 Period of Limitations. No legal action shall be brought and no
cause  of  action  shall be  asserted  by or on  behalf  of the  Company  or any
affiliate of the Company  against  Indemnitee  or  Indemnitee's  spouse,  heirs,
executors, or personal or legal representatives after the expiration of one year
from the date of  accrual  of that  cause of  action,  and any claim or cause of
action of the Company or its affiliate shall be extinguished and deemed released
unless  asserted by the timely  filing of a legal  action  within that  one-year
period;  provided,  however,  that for any claim based on Indemnitee's breach of
fiduciary duties to the Company or its stockholders, the period set forth in the
preceding  sentence  shall be three  years  instead of one year;  and  provided,
further,  that, if any shorter period of limitations is otherwise  applicable to
any such cause of action, the shorter period shall govern.

                                       19






     IN WITNESS WHEREOF,  this Agreement has been duly executed and delivered to
be effective as of the date first above written.

                         PIONEER NATURAL RESOURCES COMPANY



                         By: /s/ Mark S. Berg
                             -------------------------------------------------
                         Name:    Mark S. Berg
                         Title:   Executive Vice President and General Counsel


                         INDEMNITEE:


                         /s/ Scott D. Sheffield
                         -----------------------------------------------------
                         Scott D. Sheffield







                                       20





                                   Schedule I


     1. The  Company  entered  into an  Indemnification  Agreement  with each of
Timothy L. Dove, A.R. Alameddine,  Mark S. Berg, Chris J. Cheatwood,  Richard P.
Dealy,  William  F.  Hannes,  Danny L.  Kellum and Darin G.  Holderness  that is
otherwise identical to the one entered into with Scott D. Sheffield.

     2. The Company entered into an Indemnification Agreement with each of James
R. Baroffio, Edison C. Buchanan, R. Hartwell Gardner, Linda K. Lawson, Andrew D.
Lundquist,  Charles E. Ramsey,  Jr., Frank A. Risch,  Mark S. Sexton,  Robert A.
Solberg and Jim A. Watson,  which varied from Exhibit 10.1 by modifying  Section
7.15 to provide, in its entirety, the following:

     Section 7.15 Certain Persons Not Entitled to  Indemnification.  The Company
shall not be obligated pursuant to the terms of this Agreement:

          (a) To  indemnify  Indemnitee  if  (and  to the  extent  that) a final
     decision by a  court or arbitration body having  jurisdiction in the matter
     shall determine that such indemnification is not lawful; or

          (b) To indemnify  Indemnitee for the payment to the Company of profits
     pursuant to  Section 16(b) of  the Exchange  Act, or  Expenses  incurred by
     Indemnitee for  Proceedings in  connection with such payment under  Section
     16(b) of the Exchange Act.