Kosmos Hits New Oil Pay at Jubilee's Mahogany Deep-2

Kosmos Energy announced that the Mahogany Deep-2 appraisal well offshore Ghana confirmed the down-dip extent of the main Jubilee reservoirs in the West Cape Three Points Block and intersected two new light oil accumulations. Good quality reservoirs were encountered in the Mahogany Deep section but were water bearing at this location.

Mahogany Deep-2, drilled 3 km from Mahogany-3, is the furthest down-dip Jubilee well in the West Cape Three Points license. Results of drilling, wireline logging and samples of reservoir fluid indicate that the well has encountered good quality hydrocarbon-bearing reservoir sandstones in three zones. An interval of 12 meters net pay has proved an extension of the main Jubilee reservoirs. In addition, a new shallower accumulation, with 2 meters net pay, was encountered and supports exploration prospectivity in undrilled areas to the south and east.

In total, the well intersected 53 meters of net reservoir sandstones, 20 meters of which were in the Mahogany Deep section. These were found to be water bearing at this location but are not connected to the Mahogany Deep accumulation at Mahogany-3. Further extensions to the Mahogany Deep accumulation may exist to the south and east of Mahogany-3.

A new reservoir was also encountered in a deeper stratigraphic level beneath the Mahogany Deep section and an oil sample was successfully recovered from a 1 meter zone which has not been encountered in any other wells in the West Cape Three Points license to date.

The new accumulations discovered by the well will now be evaluated using the recently reprocessed high resolution 3D seismic data and may be the target of future drilling. Further potential extensions of the Jubilee field and associated prospectivity will be drilled early in 2010.

The Aban Abraham dynamically positioned drill-ship drilled Mahogany Deep-2 to the current depth of 4,326 meters in water depths of 1,354 meters.

Kosmos Energy is the operator of the West Cape Three Points Block in which the company holds a 30.875% interest. An affiliate of Anadarko Petroleum Corporation has a 30.875% interest; an affiliate of Tullow Oil plc has a 22.896% interest; the EO Group has a 3.5% interest; Sabre Oil & Gas has a 1.854% interest; and GNPC has a 10% carried interest.

"At Kosmos, we completed our 2009 exploration and appraisal well drilling program having drilled 10 consecutive successful exploration and appraisal wells during the last two-and-a-half years for a 100 percent success rate offshore Ghana. We have been successful in appraising discovered oil pools and finding new reservoirs to explore and appraise. We will continue to pursue the technical and commercial evaluation of Ghana's offshore Tano Basin, an emerging hydrocarbon province of significant scale," said Brian F. Maxted, Kosmos Chief Operating Officer.

Also commenting today, Angus McCoss, Tullow's Exploration Director, said, "Confirming the southerly extent of the main Jubilee reservoirs and encountering two new oil pools takes us another step closer to realising the full potential of the Greater Jubilee Area. Results from the current exploratory appraisal campaign are being integrated to define the resource base and the future phases of development beyond first oil in Q4 2010.

"We also look forward to continued exploration and appraisal success in Ghana and throughout the Equatorial Atlantic region where Tullow has built a commanding acreage position. We are currently drilling the potentially high-impact Tweneboa-2 appraisal well and expect to report on its result in February."

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