9 June 2010 – Tullow Oil plc (Tullow) announces 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.
The rig will now leave Ghana to work for another operator and will return in the fourth quarter of 2010 on a planned nine-month drilling programme in the West Cape Three Points licence.
Tullow has a 22.896% interest in the West Cape Three Points licence which is operated by Kosmos Energy.
Commenting today, Angus McCoss, Exploration Director, said:
“We have now encountered oil in four out of five wells in the exploration and appraisal programme in the area immediately to the southeast of the Jubilee Field. Future exploratory drilling in the West Cape Three Points licence, including the adjacent Teak, Dahoma-Updip and South Central Channel prospects, aims to discover even more hydrocarbons to further enhance the commercial development of this licence.”
FOR FURTHER INFORMATION CONTACT:
Tullow Oil plc
(+44 20 8996 1000)
Citigate Dewe Rogerson
(+44 207 638 9571)
(+353 1 498 0300)
Notes to Editors
Tullow is a leading independent oil & gas, exploration and production group, quoted on the London and Irish Stock Exchanges (symbol: TLW) and is a constituent of the FTSE 100 Index. The Group has interests in over 85 exploration and production licences across 22 countries and focuses on four core areas: Africa, Europe, South Asia and South America.
In Africa, Tullow has production in Gabon, Côte d’Ivoire, Mauritania, Congo (Brazzaville) and Equatorial Guinea and two large appraisal and development programmes in Ghana and Uganda. Tullow also has exploration interests in Gabon, Côte d’Ivoire, Liberia, Sierra Leone, Mauritania, Senegal, Congo (DRC), Tanzania, Madagascar, Namibia and Angola.
Tullow’s European interests are primarily focused on gas in the UK Southern North Sea where it has significant interests in the Caister-Murdoch System and the Thames area. The company also has interests offshore the Netherlands.
In South Asia, Tullow has exploration and production in Pakistan and Bangladesh. In South America, Tullow has exploration interests in Guyana, French Guiana and Suriname.