Anadarko Announces Successful Appraisal Well Encountering High-Quality Oil Offshore Ghana

Anadarko Petroleum Corporation

today announced the Enyenra-4A appraisal well, located in the Deepwater Tano Block offshore the Republic of Ghana, encountered approximately 105 feet (32 meters) of net oil pay in high-quality sandstone reservoirs, expanding the areal extent of the TEN (Tweneboa, Enyenra and Ntomme) complex. The Enyenra-4A well is located approximately 4 miles (7 kilometers) southwest of the Enyenra-2A and almost 13 miles (21 kilometers) south of the Enyenra-3A well, which defines the northern end of the Enyenra field. The well was drilled to a depth of approximately 13,694 feet (4,174 meters) in approximately 6,158 feet (1,878 meters) of water. Once operations are complete, the partnership plans to suspend the well and return the drillship, at a later date, to perform a drillstem test at Ntomme-2A. Anadarko has an 18-percent working interest in the Deepwater Tano Block. Partners in the block include Tullow Oil plc (49.95-percent working interest and operator), Kosmos Energy (18-percent working interest), Sabre (4.05-percent working interest) and the Ghana National Petroleum Corporation (10-percent carried interest).