Anadarko Highlights Pre-Salt Brazil Ops, GOM's Tonga West Development

Anadarko Petroleum Corp.

Anadarko has provided an exploration update for its Pre-Salt discovery offshore Brazil and successful appraisal in the Gulf of Mexico in its third quarter report.


  • Announced substantial pre-salt discovery offshore Brazil at the Wahoo prospect.
  • Encountered more than 700 feet of net pay in Tonga West appraisal well in Gulf of Mexico.
  • Continued U.S. onshore exploration program with encouraging results

Anadarko continues to build upon its successful international and deepwater Gulf of Mexico exploration and appraisal programs. During the third quarter, the company announced a substantial pre-salt discovery at the deepwater Wahoo prospect on block BM-C-30 in the Campos Basin offshore Brazil.

Extensive logging, fluid and pressure sampling has now confirmed more than 200 feet of net pay consisting of high-quality, high-gravity crude oil in an upper zone, with additional hydrocarbon-bearing zones encountered deeper in the well.

Casing is currently being run to total depth to prepare for drillstem testing in 2009 to further evaluate the multiple hydrocarbon-bearing zones. The partnership also is planning further exploration and appraisal drilling on the block in 2009. Anadarko, through a wholly owned subsidiary, operates the block with a 30-percent working interest.

"Since announcing the Wahoo pre-salt discovery in September, we have successfully reached total depth of approximately 20,000 feet, encountered an additional oil accumulation in the deeper objective and confirmed the quality of the previously announced reservoir," Anadarko Sr. Vice President, Worldwide Exploration, Bob Daniels said.

"We are very encouraged by this discovery and its similarities to the giant Jubarte field, and we look forward to working with the Brazilian government and our partners to further delineate the area's potential."

Anadarko plans to now move the Transocean Deepwater Millennium drillship to the Espirito Santo Basin to continue its pre-salt exploration program, which includes re-entering the Serpa prospect and drilling at least five additional pre-salt tests.

Anadarko and its partners also continue an active program offshore Ghana, where the partnership recently spud the Hyedua-2 appraisal well on the Deepwater Tano license. Prior to year end, the partnership also plans to spud the nearby Tweneboa prospect, which has similar size and seismic characteristics to the giant Jubilee field. The partners expect Jubilee to be sanctioned prior to year end.

In the Gulf of Mexico, Anadarko recently completed a successful appraisal well, located 3,000 feet to the south and up dip from the original Tonga West discovery well. The appraisal well encountered more than 700 feet of net pay in dipping formations. Anadarko is the operator with a 33.75-percent working interest.

"The Tonga West confirmation well encountered subsalt Miocene sands with much greater quality and thickness than we had anticipated," Anadarko Sr. Vice President, Worldwide Operations, Chuck Meloy said. "This well is a tremendous success that affirms this world-class reservoir and solidifies our previous estimated resource range of 200 million to 400 million BOE. Anadarko expects to sanction the Caesar/Tonga complex this year, with first significant volumes as early as 2011."

Anadarko's U.S. onshore exploration programs in the Maverick Basin, and Haynesville and Marcellus Shale plays are ongoing with encouraging results.