Anadarko Petroleum Corporation announced the Atum exploration well discovered another significant natural gas accumulation within the Offshore Area 1 of the Rovuma Basin. The Atum discovery well encountered more than 300 net feet (92 meters) of natural gas pay in two high-quality Oligocene fan systems. Preliminary data indicates this latest discovery is connected to the partnership’s recent Golfinho discovery located approximately 10 miles (16.5 kilometers) to the northwest in the Offshore Area 1.

“The combined success at Atum and Golfinho and apparent connectivity of these Oligocene fan systems, indicate these discoveries represent our partnership’s second major natural gas complex offshore Mozambique,” said Sr. Vice President, Worldwide Exploration Bob Daniels. “We estimate this new complex, which is located entirely within the Offshore Area 1 block, holds 10 to 30-plus trillion cubic feet (Tcf) of incremental recoverable natural gas resources. We plan to immediately commence a four-well appraisal program of this complex, which has the potential to underpin a large LNG development.”

The Atum exploration well was drilled to a total depth of approximately 12,665 feet (3,860 meters), in water depths of approximately 3,285 feet (1,000 meters). Once operations are complete at Atum, the partnership plans to commence appraisal activities that are expected to be followed by a drillstem testing program in the Golfinho and Atum complex.

“With this latest discovery at Atum and a successful upcoming appraisal program, we believe the total estimated recoverable natural gas resource in Mozambique’s Offshore Area 1 is between 30 and 60 Tcf, and the current upside for total gas in place for the discovered reservoirs on the block is approaching 100 Tcf. We still have additional exploration opportunities that could expand the resource potential further,” said Anadarko President and CEO Al Walker. “A recoverable resource base of this scale supports our initial two-train development plans, as well as significant future expansions. Our current activity is focused on achieving reserve certification and a Final Investment Decision in 2013, as the partnership works toward expected first sales of LNG in 2018.”

Anadarko is the operator in the Offshore Area 1 with a 36.5-percent working interest. Co-owners include Mitsui E&P Mozambique Area 1, Limited (20 percent), BPRL Ventures Mozambique B.V. (10 percent), Videocon Mozambique Rovuma 1 Limited (10 percent) and Cove Energy Mozambique Rovuma Offshore, Ltd. (8.5 percent). Empresa Nacional de Hidrocarbonetos, ep’s 15-percent interest is carried through the exploration phase.

Anadarko Petroleum Corporation’s mission is to deliver a competitive and sustainable rate of return to shareholders by exploring for, acquiring and developing oil and natural gas resources vital to the world’s health and welfare. As of year-end 2011, the company had approximately 2.54 billion barrels-equivalent of proved reserves, making it one of the world’s largest independent exploration and production companies. For more information about Anadarko and APC Flash Feed updates.

This news release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Anadarko believes that its expectations are based on reasonable assumptions. No assurance, however, can be given that such expectations will prove to have been correct. A number of factors could cause actual results to differ materially from the projections, anticipated results or other expectations expressed in this news release, including Anadarko’s ability to drill, develop and commercially operate the drilling prospects identified in this news release and to successfully plan, secure necessary governmental approvals, finance, build and operate the necessary infrastructure and LNG plant. See “Risk Factors” in the company’s 2011 Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and other public filings and press releases. Anadarko undertakes no obligation to publicly update or revise any forward-looking statements.

Press Release