EXHIBIT 99.1


                                  NEWS RELEASE

                                                   Investor Relations Contacts:
                               Susan Spratlen or Chris Paulsen   (972) 444-9001


                    Pioneer Announces Sale of Reserves using
                       Volumetric Production Payments and
                Estimated Fourth Quarter Earnings and Production

Dallas,  Texas, January 27, 2005 -- Pioneer Natural Resources Company (NYSE:PXD)
today announced that it has sold two percent of total company reserves,  or 20.5
million  barrels  of  oil  equivalent  reserves,  by  means  of  two  volumetric
production payments (VPP) for total proceeds of $593 million. Pioneer is selling
a  limited-term  overriding  royalty  interest in two of its  long-lived  legacy
assets.

Through a VPP  primarily  related to its Hugoton gas field,  the Company sold an
overriding royalty interest for a five-year term beginning February 1, 2005. The
VPP  represents  approximately  58 billion  cubic feet of gas reserves for which
Pioneer received proceeds of $276 million. The Hugoton VPP covers only about 11%
of Pioneer's  proved  Hugoton  reserves  and about 80% of its Hugoton  daily gas
production or 55% of its total daily Hugoton  production,  including the natural
gas liquids produced from the field, during the term of the VPP.

Pioneer also sold an overriding  royalty  interest in a portion of its Spraberry
oil field for a seven-year  term beginning  January 1, 2006. This VPP represents
approximately  10.8 million  barrels of oil reserves for which Pioneer  received
proceeds of $317 million. The barrels sold are approximately 3% of the Company's
proved Spraberry reserves and represent approximately 38% of Pioneer's daily oil
production from the field and about 17% of its total daily Spraberry production,
including gas and natural gas liquids, during the term of the VPP.

Scott D. Sheffield, Chairman and CEO, stated, "By selling reserves through these
VPPs, we can capture the true value of our  long-lived  assets using current oil
and gas prices,  and we are realizing  proceeds equal to approximately 8% of the
enterprise  value currently being ascribed to Pioneer by the markets in exchange
for  about 2% of our  reserves.  Collecting  the value of these  reserves  today
allows us to  complete  our  targeted  debt  reduction  program and gives us the
flexibility  to  capture  the  arbitrage  opportunity  presented  by the  equity
market's failure to appropriately  value companies with  longer-lived  reserves.
We've taken advantage of this arbitrage opportunity and purchased $92 million of
our common  shares  during 2004.  The board of directors has just approved a new
$300 million share  repurchase  program,  and these asset sales will give us the
flexibility to continue to actively buy back shares."

Subsidiaries of Wachovia  Corporation arranged or provided all of the capital to
the purchaser of the two VPPs.

The  VPP  is  a  particularly  effective  monetization  strategy  for  Pioneer's
longer-lived  asset  base as it  allows  the  Company  to  keep  the oil and gas
reserves  and  production  stream  beyond  the  limited  term of the  overriding
royalty.  The  Company  was able to lock in  commodity  prices  that  were  near
all-time  highs and  accelerate  the revenue  stream at a low discount rate, yet
retain the upside of future development drilling.  Pioneer's long-lived reserves
are  ideal  for  this  type of  transaction  due to the  relatively  stable  and
predictable  nature of their production stream. The Company plans to continue to
evaluate VPP,  royalty  trust and other  monetization  alternatives  for funding
future opportunities.

The  reserves  being  sold are only  about 3% of the  reserves  associated  with
Pioneer's five long-lived  onshore U.S. fields, and the production sold in 2006,
the first full year covered by both VPPs,  represents  approximately  12% of the
estimated 2006 production from these five fields.

For reporting purposes, Pioneer's production and reserves will be reduced by the
oil and gas  volumes  sold via the VPPs,  and the  proceeds  will be reported as
Deferred  Revenue on the balance sheet.  Over the term of the VPPs, the Deferred
Revenue  balance will be amortized  and reported as noncash oil and gas revenues
causing oil and gas revenues per barrel  oil equivalent to rise considering that






the VPP volumes are not reflected in  production.  Because  Pioneer  retains all
operating  expenses  and the  depreciation,  depletion  and  amortization  costs
related to the oil and gas production  sold,  these costs,  when calculated on a
per barrel oil equivalent  basis,  will also increase  considering  that the VPP
volumes are not included in production or proved reserves. Interest expense will
decrease by the savings  related to the proceeds  being  applied to  outstanding
debt.

The VPP  proceeds  are not  immediately  taxable and will be included in taxable
income over the five- and seven-year terms of the VPPs.

Estimated Fourth Quarter Earnings and Production

Pioneer  announced that it produced 198 thousand  barrels oil equivalent per day
(MBOEPD),  including 6 MBOEPD of field  fuel,  during the fourth  quarter,  well
within its latest  guidance  range.  The Company also  announced that it expects
earnings  for the quarter to range from $.66 to $.69 per diluted  share and will
announce  final results for the fourth  quarter and year ended December 31, 2004
on February 8, 2005.

Accounting for Field Fuel

Pioneer recently completed a voluntary internal review of the various accounting
treatments  related to field fuel  costs used by major oil  companies  and other
independents in order to determine  common  industry  practice.  The review,  in
part, was undertaken in response to the large volume of field fuel usage related
to the assets  acquired  from  Evergreen.  Field fuel is gas consumed to operate
field equipment  (primarily  compressors)  prior to the gas being delivered to a
sales point.

Pioneer  has  historically  recorded  the  value of field  fuel as an  operating
expense  with an equal  amount  recorded  as oil and gas  revenues,  with no net
income effect.  Pioneer also reflected the volumes associated with field fuel in
gas  production.  This  practice  has been  routinely  discussed by the Company,
especially in relation to the rising value of the fuel used in the field and its
contribution to rising field operating expenses.

While  Pioneer  believes its past  treatment of field fuel was  acceptable,  the
Company intends to change its reporting of field fuel, no longer recording it as
revenue or expense and not  including it as  production.  Pioneer  believes this
presentation  is more common in the industry and will provide a better basis for
comparing Pioneer to other oil and gas companies.

This change in  presentation  method for  reflecting  field fuel will reduce the
quantity of gas production that is reported,  estimated to be  approximately  15
billion cubic feet of gas or  approximately  2.5 million  barrels oil equivalent
for 2005. This change is also expected to reduce 2005 field  operating  expenses
by  approximately  $90 million or $1.25 per barrel oil equivalent of production.
Because  the  change  reduces  both oil and gas  revenues  and  field  operating
expenses by the same amount,  the change does not impact net income,  cash flow,
EBITDAX (earnings before interest, taxes, depreciation, depletion, amortization,
impairment, exploration and abandonment costs) or net asset value.

Conference Call

This morning at 10:00 a.m. Eastern,  Pioneer will host a conference call with an
accompanying presentation to discuss this morning's news releases. The call will
be webcast on Pioneer's  website,  www.pioneernrc.com.  At the  website,  select
'INVESTOR'  at the top of the  page.  For those  who  cannot  listen to the live
webcast, a replay will be available shortly after the call. Alternately, you may
dial  (800)  257-7087  (confirmation  code:  8472395)  to  listen to the call by
telephone and view the accompanying  visual presentation at the website above. A
telephone replay will be available by dialing (888) 203-1112: confirmation code:
8472395.

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






Except for historical  information contained herein, the statements in this News
Release 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 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,
international  operations  and associated  international  political and economic
instability,  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.