Mahogany East (ex. Southeast Jubilee) Field

In September, Kosmos Energy, the operator of the West Cape Three Points block submitted a Declaration of Commerciality to the Government of Ghana for the southeast Jubilee area. A Plan of Development is expected to be submitted in February 2011. Standalone and Jubilee tie-back options are currently under consideration.

  • 100-500 mmboe (million barrels of oil equivalent)
  • Significant oil accumulation, 15-43m pay

Press Release by Tullow Oil Plc on 9th June 2010 announced that the Mahogany-5 appraisal well has continued the successful appraisal of the area immediately to the southeast of the Jubilee Field offshore Ghana.

The results of drilling, wireline logs and reservoir fluid samples show that the well penetrated a total net oil pay of 23 metres in sandstone reservoirs over a gross interval of 51 metres. Reservoir fluid samples recovered 28-32 degree API oil and pressure data have confirmed reservoir communication with the previously drilled Mahogany-4 well.

Mahogany-5 completes the appraisal of the southeast Jubilee area and follows successes at the Mahogany-3, Mahogany-4 and Mahogany Deep-2 wells. Geoscience and engineering studies are continuing to refine the potential resource range and to advance development planning activities for this area.

The well was drilled by the Atwood Hunter rig to a total depth of 3,988 metres in a water depth of 1,149 metres. The well is located approximately 62km offshore and about 7km southeast of the Mahogany-1 well, the Jubilee discovery well.


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 & Gas Holdings Limited, 1.854% working interest


The West Cape Three Points Block has delivered world-class results to date and continues to offer significant potential for Kosmos. Wells in the area have demonstrated a working hydrocarbon system and the presence of high- quality reservoirs.

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 the largest oil find 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, wireline logs and reservoir fluid samples . 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).

Drillstem tests of the Mahogany-1 discovery well and the Mahogany-2 and the Hyedua-2 appraisal wells have demonstrated that individual wells can produce more than 20,000 barrels of oil per day. Kosmos and its partners developed the Jubilee Field on an accelerated schedule and delivered first oil on November 28, 2010.

In addition, the Mahogany-3 well discovered Mahogany Deep (now included in Mahogany East), a new find of good-quality oil pay in an untested, stratigraphically deeper and separately trapped reservoir beneath the Jubilee Field. Subsequent appraisal drilling by the Mahogany-4, Mahogany-5 and Mahogany Deep-2 wells has defined the extent of those accumulations.

A significant drilling program is planned for exploration prospects on the West Cape Three Points Block.


































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