EXHIBIT 99.3 NEWS RELEASE Pioneer and Woodside Agree to Jointly Explore for Gas on Gulf of Mexico Shelf Dallas, Texas, January 23, 2003 -- Pioneer Natural Resources Company ("Pioneer") (NYSE:PXD) and Woodside Energy (USA) Inc., a subsidiary of Woodside Energy Ltd. of Australia (ASX:WPL) have agreed to a joint exploration program for a two-year campaign over the shallow-water Texas Shelf region of the Gulf of Mexico. Under the agreement, Woodside has taken a 50% interest in 47 offshore exploration blocks operated by Pioneer. The agreement covers eight prospects and 19 leads and includes five wells in 2003 and three in 2004. The agreement represents a total cost to Woodside of US$55 million. Most of the wells will target gas plays below 15,000 feet (4500 meters). The eight wells to be drilled by the parties in 2003 and 2004 are on prospects generated and leased by Pioneer since 1997. In addition, the companies will evaluate for potential inclusion in the drilling program shallower gas prospects on other blocks covered by the leases. Woodside's Director of New Ventures, Dr. Agu Kantsler, said the Pioneer agreement is a key building block in Woodside's growth strategy. It provides the company with a cost-effective opportunity to participate in and evaluate the Gulf of Mexico shelf gas play. "The Gulf of Mexico is one of Woodside's four focus areas in our search for international exploration and production opportunities to complement our Australian interests," Dr. Kantsler said. "Through this transaction, we continue our staged approach to building a balanced portfolio of shallow and deepwater opportunities in the Gulf of Mexico to manage risk and reward." Pioneer's Executive Vice President of Exploration, Chris Cheatwood, said drilling of the first of five wells is expected to begin before the end of March. "By combining both companies' technical expertise and capital, we can better manage our risk and properly test a broader portfolio of prospects," he said. Dr. Kantsler said the Pioneer acreage targets emerging deep gas, an under-explored play that has attracted significant interest in the past few years, primarily because discoveries can be brought into production within six months to two years due to their proximity to existing infrastructure. "This opportunity offers the potential for Woodside to achieve gas production and revenue from the Gulf shelf within the next two years," Dr. Kantsler said. Woodside Energy Ltd. is Australia's largest exploration and production company by market capitalization and is operator of the North West Shelf Venture, Australia's largest resource project. Its interests include Australia, Gulf of Mexico, North Africa and West Africa. Pioneer is a large U.S. independent oil and gas exploration and production company with operations in the United States, Canada, Argentina, South Africa, Gabon and Tunisia. 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. Pioneer Natural Resources Company Woodside Energy Ltd. & Subsidiaries 5205 N. O'Connor Blvd., Suite 1400 ACN 004 898 962 Irving, Texas 75039 1 Adelaide Terrace, Perth, Western Australia 6000 Tel: 972 444 9001 Tel: 61 8 9348 4000 Fax: 61 8 9348 5539 www.pioneernrc.com www.woodside.com.au Investment and Media Contact: Media Contact: Susan Spratlen, Vice President, Rob Millhouse, Public Issues Manager Investor Relations and Communication W: 61 8 9348 4281 972 444 9001 M: 61 419 588 166 Investment Contact: Mike Lynn, Investor Relations Manager W: 61 8 9348 4283 M: 61(10439) 691 592