EXHIBIT 99.1

                                  NEWS RELEASE


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

           Pioneer Replaces 258% of 2002 Production at $6.30 per BOE,
                  Announces 2003 Capital Budget and Growth Plan

Dallas, Texas, January 23, 2003 -- Pioneer Natural Resources Company ("Pioneer")
(NYSE:PXD)  announced that as of December 31, 2002, its total proved oil and gas
reserves were 737 million barrels oil equivalent  (MMBOE), or 4.4 trillion cubic
feet (Tcf) natural gas  equivalent,  including 381 million  barrels  (MMBbls) of
crude oil and natural gas liquids and 2.1 Tcf of natural gas.

Pioneer  added 107 MMBOE of  proved  reserves  during  2002,  replacing  258% of
production  at a finding cost of $6.30 per BOE. The Company  added 84 MMBOE from
extensions,  discoveries and revisions and acquired 23 MMBOE during 2002.  Costs
incurred   during  2002  totaled  $672  million,   including  $477  million  for
development  and  exploration  activities  and $195  million  for  acquisitions.
Development  activities  included $222 million invested during the year for well
completion,  facilities  construction  and  installation  for  four  significant
projects to develop reserves  recorded in prior years.  Year-end proved reserves
and costs incurred are detailed in the attached  supplemental  schedule.  Proved
developed reserves account for approximately 67% of total proved reserves.

For the three years ending in 2002,  Pioneer's  finding cost averaged  $6.24 per
BOE.  Over the  three-year  period,  Pioneer  added 266  MMBOE  for total  costs
incurred of $1.7 billion.  Three-year average reserve  replacement was 210%. For
the five years ending in 2002,  Pioneer's  finding cost averaged  $6.88 per BOE.
Over the five-year  period,  Pioneer added 338 MMBOE for total costs incurred of
$2.3 billion. Five-year average reserve replacement was 140%.

Pioneer has several  discoveries  that have not been recorded as proved reserves
due to continuing project evaluations.  In Gabon, Pioneer has drilled and tested
four successful offshore wells which have established  significant oil in place.
Full  development  of the  field is  expected  to  involve  substantial  capital
investment  underscoring the importance of confirming reservoir  characteristics
and  productivity.  Pioneer  is  seeking  bids for the  development  of an early
production system covering a limited field area which would allow the Company to
gain additional  information needed to design a full field development plan. The
Company is also seeking improved fiscal terms from the government.

Scott D.  Sheffield,  Chairman and CEO,  stated,  "We know we have a significant
amount of oil in place in Gabon,  and obtaining this early  production data will
give us needed insight in order to design the most cost-effective infrastructure
for  developing  and producing  that oil, and thereby  maximizing  our return on
investment."

2003 Capital Budget and Growth Plan

Pioneer's  Board of Directors has approved a 2003 capital budget of $450 million
to $550 million for its planned  development  and exploration  activities.  With
most of the capital required for large project  facilities having been fulfilled
during 2002,  a higher  percentage  of the 2003 capital  budget will be directed
toward  drilling  activities.  The Company  plans to drill over 400 wells during
2003.  Pioneer expects to fund the capital budget from its cash flow and expects
to  have  significant  excess  cash  flow  to  allocate  to the  development  of
exploration successes, small core-area acquisitions, debt reduction and/or share
repurchases.

Approximately 60% of the budget is directed toward U.S. activity,  about half of
which  is  allocated  to  onshore  development  activities  principally  in  the
Spraberry,  West Panhandle, and Pawnee fields. The other half of the U.S. budget
is earmarked for  exploration  and development in the Gulf of Mexico and Alaska.
Canada and Argentina  activity each account for  approximately 9% of the budget,
and approximately 22% is expected to be invested in Africa.

Development  activities  account  for  approximately  65%  of  expected  capital
expenditures.  Exploration drilling capital represents  approximately 25% of the
budget, and seismic and other G&G capital represents 10% of the budget.

Pioneer plans to increase drilling  activities related to the development of its
U.S. onshore core areas and will continue its development  drilling  programs in
Argentina and Canada.  The exploration  program includes plans to drill seven to





ten wells in the Gulf of Mexico, up to three wells in Alaska,  six to nine wells
in Tunisia,  and three wells offshore South Africa. In Canada,  Pioneer plans 20
exploration  wells  including  17  lower-cost,  shallow gas tests.  Pioneer will
continue  to drill  lower-risk  step-out  exploration  wells  onshore  Argentina
focused on oil prospects.

Included in the U.S. development budget is approximately $35 million to complete
facilities for the Falcon, Sable and Devils Tower projects.  Falcon, a gas field
being  developed by Pioneer in the deepwater Gulf of Mexico,  is on schedule and
expected to reach first production  during the second quarter of 2003. Sable, an
oil field being developed offshore South Africa, is also expected to reach first
production during the second quarter of 2003 as a result of schedule changes for
the upgrade in progress on the floating production facilities.  Devils Tower, an
oil field being  developed in the deepwater  Gulf of Mexico,  is now expected to
reach first production in early 2004 after adjusting for third-party  changes in
the construction  schedule for the truss spar production facility.  The combined
impact  of these  schedule  changes  represents  approximately  1% of  Pioneer's
expected 2003 total production,  and the Company believes it has the flexibility
in its  drilling  plans to  offset  the  impact of the  changes.  Impact to 2004
production is expected to be minimal.

Pioneer  expects  average daily  production to rise  approximately  45% in 2003.
Production  is expected to rise at least 10% to 15% in 2004 from the impact of a
full year of production from the Falcon,  Sable and Devils Tower fields, and any
new discoveries resulting from Pioneer's extensive exploration program could add
to production growth.

Mr. Sheffield stated, "We have reached an important  milestone for Pioneer.  The
large  investments  fueling  our growth  have been made,  and the cash flow from
those investments is just beginning. We expect to back-up our exceptional growth
in 2003 with  strong  growth  in 2004 and 2005.  Our  three-year  plan  gives us
confidence  that beyond 2003 we can  continue to grow  production  by 10% to 15%
each year."

Pioneer is a large  independent oil and gas  exploration and production  company
with operations in the United States, Canada, Argentina, South Africa, Gabon 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  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.  These and other
risks are  described in Pioneer's  10-K and 10-Q Reports and other  filings with
the Securities and Exchange Commission.