West Cape Three Points Block
Location: Gulf of Guinea’s Tano Basin, about 12 km (about seven miles) from the Ghanaian coastline and 95 km (59 miles) southwest of the port city of Takoradi
Size: 1,761 km2 (435,200 acres)
Water depth: 50-1,800 meters (approximately 165-5,900 feet)
Contract: petroleum agreement
Working interest: 30.875%
Operator: Kosmos Energy Ghana
Partners: Anadarko, 30.875% working interest; Tullow Oil plc, 22.896% working interest; Ghana National Petroleum Corporation, 10% participating interest; E.O. Group, 3.5% working interest; Sabre Oil and Gas Limited, 1.854% working interest
The West Cape Three Points Block has delivered world-class results and continues to offer significant potential for Kosmos. Wells in the area have demonstrated a working hydrocarbon system and reservoir presence.
In 2004, Kosmos recognized the potential in stratigraphic pinch-out and combination structural traps located in well-developed channel systems. In early 2005, the company conducted a 1,075-km2 3D seismic survey to evaluate the play, define reservoir fairways and map trapping geometries.
In June 2007, the Kosmos Energy team discovered the Jubilee Field following the drilling of the Mahogany-1 exploration well in Ghana’s deep waters. This is possibly one of the largest oil finds in the last decade offshore West Africa. Building on their success, the team drilled the Odum-1 discovery well in early 2008, which confirmed a major oil province in Ghana’s western region of the Gulf of Guinea.
The Mahogany-1 exploration well discovered a significant oil accumulation based on the results of drilling and wireline logs, and a sample of the reservoir fluid. The find opened a new play fairway in the Tano Basin. The Mahogany-1 well encountered a gross hydrocarbon column of 270 meters (885 feet) with 95 meters (312 feet) of net stacked pay in a Cretaceous sandstone reservoir. The well, drilled in water depths of 1,320 meters (4,330 feet), reached a total depth of 3,826 meters (12,550 feet).
Successful appraisal of the area by the Mahogany-2 and Mahogany-3 wells on the West Cape Three Points Block and the Hyedua-1 and Hyedua-2 wells on the adjacent Deepwater Tano Block validated that the Jubilee Field is significant. Drillstem tests of the Mahogany-2 and Hyedua-2 wells have indicated individual wells could produce more than 20,000 barrels of oil per day. Kosmos and its partners are planning a fast-track development of the Jubilee Field, targeting first production for 2010.
In addition, the Mahogany-3 well discovered the Mahogany Deep, a significant new find of good-quality oil pay in an untested, stratigraphically deeper and separately trapped reservoir beneath the Jubilee Field.
The Odum-1 exploration well discovered another new field. The well, which encountered 22 meters (72 feet) of net oil-bearing pay in a gross oil column of 60 meters (197 feet), is being evaluated. Kosmos and its partners acquired an additional high-resolution 3D survey over the southeastern portion of the West Cape Three Points Block covering the Odum discovery and the adjacent area in 2008.
In 2009, the team plans to drill additional appraisal wells on both the West Cape Three Points and Deepwater Tano blocks. Also, Kosmos expects to drill several high-impact exploration wells on the blocks, some of which will target late Cretaceous stratigraphic traps. Targets include the Teak prospect on the West Cape Three Points Block.
Kosmos has contracted for long-term rig capacity to pursue its aggressive drilling program offshore Ghana.
For additional information about activities on the Deepwater Tano Block, please see the Deepwater Tano Block discussion.
Deepwater Tano Block
Location: Gulf of Guinea’s Tano Basin, west of and adjacent to Kosmos’s West Cape Three Points Block in the Gulf of Guinea
Size: 1,106 km2 (273,298 acres)
Water depth: 200-2,060 meters (approximately 656-6,758 feet)
Contract: petroleum agreement
Working interest: 18%
Operator: Tullow Oil plc
Partners: Tullow Oil plc, 49.95% working interest; Anadarko, 18% working interest; Ghana National Petroleum Corporation, 10% participating interest; Sabre Oil and Gas Limited, 4.05% working interest
In 2006, Kosmos entered the Deepwater Tano Block following the company’s success on the West Cape Three Points Block.
In 2007, Kosmos Energy’s Hyedua-1 well on the Deepwater Tano Block confirmed the company’s Jubilee Field discovery was a significant oil accumulation and demonstrated a sizable extension of the field. The Hyedua-1 well was drilled approximately 5.3 kilometers (3.3 miles) to the southwest of the Mahogany-1 discovery well, which is located on the West Cape Three Points Block.
The Hyedua-1 well encountered a gross reservoir interval of 202 meters, which includes 108 meters of high-quality stacked reservoir sandstones and net hydrocarbon-bearing pay of 41 meters. In addition, the results of logging and pressure testing suggest the reservoir sands are in communication with the Mahogany discovery, indicating combined hydrocarbon columns of 361 meters in a continuous accumulation extending across the Deepwater Tano and West Cape Three Points licenses. The Hyedua-1 well, which was drilled in water depths of 1,530 meters, reached a total depth of 4,002 meters.
In early 2009, Kosmos announced the successful Hyedua-2 appraisal well further substantiated that the Jubilee Field reservoirs are highly productive, continuous and connected.
In the first quarter of 2009, Kosmos and its partners drilled the Tweneboa-1 exploration well that discovered a light hydrocarbon accumulation. The Tweneboa-1 well penetrated net hydrocarbon-bearing pay of 21 meters in a single, good-quality sandstone reservoir similar in age to those found in the Jubilee Field.
For additional information about activities on the Deepwater Tano Block, please see the West Cape Three Points Block discussion.