DALLAS – Kosmos Energy has encountered gas/condensate in the Tweneboa-3 appraisal well offshore Republic of Ghana. The Deepwater Tanto block well confirms the Greater Tweneboa Area potential, Kosmos says.

Tweneboa-3 has two deviated boreholes to separate areas of the Tweneboa field. The first leg was drilled to calibrate the potential of an area that had a weak seismic response. This leg encountered approximately 9 m (29 ft) of gas/condensate pay. The well was then sidetracked 550 m (1,808 ft) west, targeting an area of strong seismic response. This second leg encountered a gross vertical reservoir interval of approximately 65 m (214 ft), penetrating net gas-condensate pay of 34 m (112 ft) in high-quality stacked reservoir sandstones in two zones.

The Tweneboa-3 well is 12 km (7.5 mi) southeast of the Tweneboa-1 discovery well. The Tweneboa-3 well was drilled by the Deepwater Millennium dynamically positioned drillship to a TD of 3,906 m (12,816 ft) in a water depth of 1,601 me (5,253 ft).

Kosmos holds an 18% interest in the Deepwater Tano block. An affiliate of Tullow Oil operates the block with a 49.95% interest. An affiliate of Anadarko Petroleum Corp. has an 18% interest; Sabre Oil & Gas Holdings Ltd has a 4.05% interest; and Ghana National Petroleum Corp. has a 10% carried interest.