EXHIBIT 99.1


                                  NEWS RELEASE

                                                               Company Contacts:
                                       Investors: Frank Hopkins or Chris Paulsen
                                      Media and Public Affairs:   Susan Spratlen
                                                                  (972) 444-9001

                 Pioneer Receives Proceeds of $300 Million from
                 Third Volumetric Production Payment Transaction


Dallas,  Texas,  April 18, 2005 -- Pioneer Natural Resources Company  (NYSE:PXD)
today announced that it has closed a third volumetric  production  payment (VPP)
transaction  under which it sold 7.3 million  barrels  oil  equivalent  (BOE) of
proved  reserves,  or less  than  one  percent  of the  Company's  total  proved
reserves, for proceeds of $300 million. The Company received over $41 per BOE at
a discount rate of 5.2%, or  approximately  $34 per BOE after adjustment for the
operating costs for which Pioneer maintains responsibility.

Through the VPP,  Pioneer sold a limited term overriding  royalty  interest in a
portion of its Spraberry oil and gas field.  The oil sold through the VPP is for
a 5-year term  beginning  January 1, 2006,  while the gas sold is for a 32-month
term  beginning May 1, 2005.  The production  sold  represents  less than 20% of
Pioneer's  daily  production  from  the  field  during  the  term of the VPP and
approximately  2% of the Company's proved  Spraberry  reserves.  The schedule of
production volumes sold and related deferred revenue  amortization by year is as
follows:


                                                                             Deferred Revenue
                Oil Production       Gas Production       Total Production     Amortization
     Year      (million barrels)   (billion cubic feet)     (million BOE)        (millions)
     ----      -----------------   --------------------   ----------------   ----------------
                                                              
     2005             -                   1.6                    0.3              $  10
     2006            1.4                  2.3                    1.8              $  73
     2007            1.3                  2.1                    1.7              $  68
     2008            1.2                   -                     1.2              $  52
     2009            1.2                   -                     1.2              $  50
     2010            1.1                   -                     1.1              $  47
                     ---                  ---                    ---               ----
     Total           6.2                  6.0                    7.3              $ 300


Scott D. Sheffield,  Chairman and CEO, stated,  "The VPP allows us to unlock the
value of our  long-lived  assets at  today's  high oil and gas  prices.  The VPP
proceeds,  coupled  with the strong  free cash flow we expect to  generate  this
year,  will enhance our  financial  flexibility  to develop  future  exploration
successes, secure accretive, bolt-on acquisitions, support share repurchases and
potentially increase future dividends."

Barclays  Capital,  the  investment  banking  division of Barclays Bank PLC, has
arranged or provided the capital to the purchaser of the VPP.

The  VPP  is  a  particularly  effective  monetization  strategy  for  Pioneer's
longer-lived  asset base due to the  predictability of the production stream and
related  operating costs.  The VPP transaction  allows the Company to accelerate
this revenue stream at a low discount rate,  while  eliminating  commodity price
and  interest  rate  risk.  Pioneer  also  keeps  the oil and gas  reserves  and
production  stream  beyond the limited term of the VPP and retains the upside of
future development drilling.

For reporting purposes, Pioneer's production and reserves will be reduced by the
oil and gas  volumes  sold via the VPP,  and the  proceeds  will be  reported as
Deferred  Revenue on the balance  sheet.  Over the term of the VPP, the Deferred
Revenue  balance will be amortized and reported as noncash oil and gas revenues,
thereby  causing  oil and gas  revenues  per BOE to rise as a result  of the VPP
volumes not being reflected in production. Because Pioneer retains all operating





costs and the depreciation,  depletion and amortization costs related to the oil
and gas production sold, these costs,  when calculated on a per BOE basis,  will
also increase,  recognizing  that the VPP volumes are not included in production
or proved  reserves.  Interest expense will decrease as a result of the proceeds
being applied to outstanding debt.

The VPP  proceeds  are not  immediately  taxable and will be included in taxable
income over the term of the VPP.

In January of this year,  Pioneer  announced  the  closing of its first two VPPs
with proceeds  totaling $593 million.  These VPPs included oil reserves from the
Spraberry field and gas reserves from the Hugoton field.

Pioneer is a large  independent oil and gas  exploration and production  company
with  operations in the United States,  Argentina,  Canada,  Equatorial  Guinea,
Nigeria,  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.