EXHIBIT 99.1


                                  NEWS RELEASE

                    Investor Relations Contact: Susan Spratlen   (972) 444-9001

         Pioneer Announces Debt Exchange Offers and Consent Solicitation

Dallas,  Texas, June 10, 2004 -- Pioneer Natural  Resources Company  ("Pioneer")
(NYSE:PXD)  today  announced  that it has  commenced  offers  to  exchange  (the
"Exchange  Offers") any and all of three series of its outstanding  senior notes
for a new  series of  Senior  Notes due 2016  (the  "New  Notes")  and cash.  In
connection with the Exchange Offers,  Pioneer is soliciting consents to proposed
amendments  to the  supplemental  indentures  governing two of the series of its
outstanding  senior  notes.  To encourage  holders to tender  early,  Pioneer is
offering an early exchange payment to holders who validly tender their old notes
before 5:00 p.m.,  New York City time,  on  Thursday,  June 24, 2004 (the "Early
Exchange  Date").  The Exchange Offers expire at 12:00  midnight,  New York City
time, on Friday, July 9, 2004 (the "Expiration Date").

Timothy L. Dove,  Executive Vice President and Chief Financial Officer,  stated,
"This debt  exchange is expected to establish a new benchmark  investment  grade
12-year  senior note with an  attractive  coupon and at a low  issuance  cost to
Pioneer,  while  retiring a portion of our existing  higher  coupon  notes.  Our
liquidity is enhanced by extending  the debt  maturities,  and we  significantly
reduce our annual cash interest costs."

Pioneer  is  offering  to  exchange  any and all of its  $150,000,000  aggregate
principal  amount of  outstanding 8 1/4% Senior Notes due 2007 (CUSIP No. 701018
AB 9) (the "8 1/4%  Notes"),  its  $339,169,000  aggregate  principal  amount of
outstanding  9-5/8%  Senior Notes due April 1, 2010 (CUSIP No.  723787 AC 1)(the
"9-5/8% Notes"), and its $150,000,000  aggregate principal amount of outstanding
7.50%  Senior  Notes due 2012 (CUSIP No.  723787 AD 9) (the  "7.50%  Notes," and
together  with the 8 1/4% Notes and the 9-5/8% Notes,  the "Old  Notes"),  for a
like  principal  amount of New Notes and cash that,  together with the principal
amount of the New  Notes,  equals  the early  exchange  price in the case of Old
Notes validly tendered before the Early Exchange Date and not validly withdrawn,
and equals the exchange  price in the case of Old Notes tendered after the Early
Exchange Date and before the  Expiration  Date. The early exchange price and the
exchange  price for each series of Old Notes are based on  fixed-spread  pricing
formulas.  Pioneer  will also pay accrued  and unpaid  interest on the Old Notes
accepted in the Exchange Offers to, but not including, the applicable settlement
date  minus,  in the case of the  final  settlement  date,  accrued  and  unpaid
interest  on the New Notes to, but not  including,  the final  settlement  date.
Pioneer has the right in its sole  discretion to amend,  extend or terminate the
Exchange Offers with respect to each series of Old Notes and to extend the Early
Exchange Date and the Expiration Date.

In connection with the Exchange Offers for the 9-5/8% Notes and the 7.50% Notes,
Pioneer is  soliciting  consents  to  proposed  amendments  to the  supplemental
indentures  governing  the  9-5/8%  Notes  and the  7.50%  Notes.  The  proposed
amendments  will  permanently   remove   substantially   all  of  the  operating
restrictions with respect to these notes.  These  restrictions  currently do not
apply to Pioneer  because these notes have  investment  grade  ratings.  Holders
tendering  their 9-5/8% Notes and 7.50% Notes will be deemed to have delivered a
consent to the proposed  amendments.  Pioneer will make no separate  payment for
consents delivered in the consent solicitation.

To encourage holders to tender early, holders who validly tender their Old Notes
before the Early Exchange Date will be entitled to an early exchange  payment in
cash as part of the early exchange price for their Old Notes. The early exchange
payment for holders who validly tender before the Early Exchange Date will equal
$6.50  per  $1,000  principal  amount of the 8 1/4%  Notes,  $10.00  per  $1,000
principal amount of the 9-5/8% Notes and $10.00 per $1,000 principal amount of
the 7.50% Notes.

The New Notes will mature on July 1, 2016 and will bear  interest from the early
settlement date (Thursday, July 1, 2004) at a rate per annum equal to the sum of
(a) the yield on the 4.75% U.S.  Treasury Note due May 15, 2014 as of 2:00 p.m.,
New York City time, on the second  business day before the Early  Exchange Date,







plus (b) 1.40%.  The New Notes will be unsecured  senior  obligations of Pioneer
and will rank equally with all of Pioneer's other unsecured senior indebtedness.

Early Exchange Price for Old Notes Tendered Before the Early Exchange Date

The early exchange price for each $1,000  principal amount of each series of Old
Notes validly  tendered  before the Early Exchange Date will be calculated as of
2:00 p.m.,  New York City  time,  on the  second  business  day before the Early
Exchange Date by discounting to the early  settlement  date  (Thursday,  July 1,
2004),  the  remaining  payments of principal  and interest on $1,000  principal
amount of the series of Old Notes  through its maturity  date at a discount rate
equal to (a) the applicable  fixed spread listed in the table below plus (b) the
bid-side yield on the applicable  reference U.S. Treasury Security listed in the
table below. To that discounted amount will be added the early exchange payment,
minus accrued and unpaid  interest on the Old Notes to, but not  including,  the
early settlement date. The early exchange price will be paid only to holders who
validly tender their Old Notes before the Early Exchange Date and do not validly
withdraw their tenders.


                                                               Early Exchange
                                        Reference                Fixed Spread
            Series              U.S. Treasury Security         (in basis points)
         ------------        --------------------------        -----------------
                                                      
         8 1/4% Notes          3.125% due May 15, 2007               +85
         9-5/8% Notes        6.5% due February 15, 2010             +100
         7.50% Notes           4.75% due May 15, 2014                +80


The portion of the early  exchange price for each series of Old Notes that is in
excess of $1,000,  plus accrued and unpaid interest on the Old Notes to, but not
including,  the  early  settlement  date,  will be  paid  in  cash on the  early
settlement date with respect to Old Notes of that series that have been tendered
and accepted. The remainder of the early exchange price will be paid through the
issuance  of $1,000  principal  amount of New  Notes for each  $1,000  principal
amount of Old Notes accepted for exchange.

Exchange Price for Old Notes Tendered After the Early Exchange Date

The exchange price for each series of Old Notes validly tendered after the Early
Exchange Date and before the Expiration Date will be calculated as of 2:00 p.m.,
New York City time,  on the second  business day before the  Expiration  Date by
discounting  to the  final  settlement  date  (Wednesday,  July 14,  2004),  the
remaining  payments of principal and interest on $1,000  principal amount of the
series of Old Notes  through its maturity  date at a discount  rate equal to (a)
the  applicable  fixed spread  listed in the table below,  plus (b) the bid-side
yield on the applicable  reference U.S.  Treasury  Security  listed in the table
below.  This  discounted  amount will also be adjusted by the change in price of
the New Notes.  The change in price of the New Notes  will be  calculated  as of
2:00 p.m., New York City time, on the second  business day before the Expiration
Date by discounting  the remaining  payments of principal and interest on $1,000
principal  amount of the New Notes through July 1, 2016 at a discount rate equal
to (a) 1.40%,  plus (b) the bid-side  yield on the 4.75% U.S.  Treasury Note due
May 15, 2014, minus (c) accrued and unpaid interest on the New Notes to, but not
including, the final settlement date, and minus (d) $1,000. From this discounted
amount (as adjusted for the change in price of the New Notes) will be subtracted
accrued and unpaid interest on $1,000  principal amount of Old Notes to, but not
including,  the final  settlement  date. The exchange price will not include the
early exchange payment.


                                        Reference                Fixed Spread
            Series              U.S. Treasury Security         (in basis points)
         ------------        --------------------------        -----------------
                                                      
         8 1/4% Notes          3.125% due May 15, 2007               +95
         9-5/8% Notes        6.5% due February 15, 2010             +110
         7.50% Notes           4.75% due May 15, 2014                +90


The portion of the exchange price for each series of Old Notes that is in excess
of $1,000,  plus (a)  accrued  and unpaid  interest on the Old Notes to, but not
including,  the final  settlement  date,  and minus (b) any  accrued  and unpaid
interest on the New Notes to, but not including, the final settlement date, will
be paid in cash  on the final  settlement date with respect to Old Notes of that





series that have been tendered and accepted  after the Early  Exchange Date. The
remainder  of the  exchange  price will be paid  through the  issuance of $1,000
principal  amount  of New Notes for each  $1,000  principal  amount of Old Notes
accepted for exchange.

Pioneer expects that holders who validly tender their Old Notes before the Early
Exchange Date will receive  their New Notes and cash payments on Thursday,  July
1, 2004,  and that  holders who validly  tender  their Old Notes after the Early
Exchange  Date but before the  Expiration  Date will receive their New Notes and
cash payments on Wednesday, July 14, 2004.

The  Exchange  Offers  are  subject  to the  satisfaction  or waiver of  certain
conditions,  including  (1) the receipt of consents to the  proposed  amendments
from the holders of a majority of the aggregate  outstanding principal amount of
the 9-5/8% Notes and the 7.50% Notes in order to complete  the  Exchange  Offers
for those series and (2) the ability to accept  tenders of at least $250 million
aggregate principal amount of Old Notes in order to complete any of the Exchange
Offers at the Early Exchange Date or the Expiration Date. Pioneer is making each
Exchange  Offer  independently  of the other  Exchange  Offers,  and,  except as
described in this paragraph, no Exchange Offer is conditioned upon completion of
any other Exchange Offer.

The terms of the Exchange  Offers are described in Pioneer's  Exchange  Circular
dated June 10, 2004. The Bank of New York is the exchange agent for the Exchange
Offers and will be the trustee under the New Notes. D.F. King & Co., Inc. is the
information  agent for the Exchange Offers.  Requests for copies of the Exchange
Circular and  questions  regarding  the Exchange  Offers may be directed to D.F.
King & Co., Inc. at 1-800-859-8509 (US toll-free). Deutsche Bank Securities Inc.
is Pioneer's  lead  financial  advisor for the Exchange  Offers,  and  Citigroup
Global  Markets  Inc.  and  Credit  Suisse  First  Boston  LLC are  co-financial
advisors.

This  announcement  is not an offer to exchange,  a solicitation  of an offer to
exchange  or a  solicitation  of consent  with  respect to any  securities.  The
Exchange  Offers will be made  solely by the  Exchange  Circular  dated June 10,
2004.

Neither the United  States  Securities  and  Exchange  Commission  nor any state
securities  commission has approved or disapproved of these securities or passed
upon the adequacy or accuracy of the Exchange  Circular.  Any  representation to
the contrary is a criminal offense.

The Exchange  Offers are not being made to, nor will Pioneer  accept  tenders of
Old Notes from,  holders in any jurisdiction in which the Exchange Offers or the
acceptance  thereof would not be in compliance  with the  securities or blue sky
laws of such jurisdiction.

The New Notes have not been and will not be registered  under the Securities Act
of 1933. Pioneer is making the Exchange Offers in reliance on the exemption from
the registration  requirements of the Securities Act of 1933 afforded by Section
3(a)(9) thereof.

Pioneer is a large  independent oil and gas  exploration and production  company
with operations in the United States, Argentina, Canada, Gabon, South Africa and
Tunisia.  Pioneer's  headquarters are in Dallas,  Texas.  For more  information,
visit Pioneer's website at www.pioneernrc.com.

Except for  historical  information  contained  herein,  the  statements in this
Document  are  forward-looking  statements  that are made  pursuant  to the Safe
Harbor  Provisions  of the  Private  Securities  Litigation  Reform Act of 1995.
Forward-looking  statements  and  the  business  prospects  of  Pioneer  Natural
Resources  Company are subject to a number of risks and  uncertainties  that may
cause Pioneer's  actual results in future periods to differ  materially from the
forward-looking  statements.  These risks and uncertainties include, among other
things,   volatility  of  oil  and  gas  prices,   product  supply  and  demand,
competition,   government  regulation  or  action,  foreign  currency  valuation
changes,  foreign government tax and regulation changes,  litigation,  the costs
and results of drilling and operations,  Pioneer's  ability to replace reserves,
implement its business plans, or complete its development projects as scheduled,
access  to and cost of  capital,  uncertainties  about  estimates  of  reserves,
quality of  technical  data,  environmental  and weather  risks,  acts of war or
terrorism.  These  and other  risks are  described  in  Pioneer's  10-K and 10-Q
Reports and other filings with the Securities and Exchange Commission.