Tullow Extends West Africa Oil and Gas Discovery with Tweneboa-2

Tullow Oil (TLW) announced today that the Tweneboa-2 appraisal well offshore the West African country of Ghana has extended the Tweneboa field, establishing it as a major oil and gas condensate field.

Test results extend the Tweneboa hydrocarbon column to a combined 350 meters between the Tweneboa-1 and Tweneboa-2 wells, revealing the field is an extensive turbidite fan system.

Spud in December 2009, Tweneboa-2 is located just 6 kilometers from the original Tweneboa-1 discovery on the Deepwater Tano block offshore Ghana. Drilled by the Atwood Hunter semisubmersible drilling rig at a water depth of 1,321 meters, the well reached a total depth of 3,600 meters.

Angus McCoss, the exploration director for Tullow Oil, revealed that the company plans to continue appraisal activities with drilling on the Tweneboa field slated for later this year.

Tweneboa was discovered in March 2009 by the Tweneboa-1 exploration well. Initial data on Tweneboa shows that the field could contain up to 1.4 billion barrels of oil and span some 200 square kilometers.

Tullow Oil serves as the operator of Tweneboa with 49.95% interest in the Deepwater Tano block. Partners on the license include Kosmos Energy with 18%, Anadarko Petroleum with 18%, Sabre Oil & Gas with 4.05% and the Ghana National Petroleum Corporation (GNPC) with a carried interest of 10%.



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