Tullow Mahogany Appraisal Extends Jubilee Eastwards

Source: www.gulfoilandgas.com 10/15/2009, Location: Africa

Tullow Oil plc announces that the Mahogany-4 appraisal well has successfully encountered 43 metres of net pay and but found them water-bearing at that location.

Mahogany-4 appraisal well offshore Ghana extends Jubilee field eastwards
The Mahogany-4 appraisal well, located in the West Cape Three Points licence offshore Ghana, has intersected light oil columns in sandstone reservoirs. In total, 43 metres of net hydrocarbon pay have been penetrated. Mahogany-4 is the eastern-most well on the Jubilee field to date and has been drilled to evaluate its lateral extent and to explore deeper potential reservoir targets.

Results of drilling, wireline logs and samples of reservoir fluid confirm that the Jubilee field extends beyond this location, which is 3.3 kilometres southeast of Mahogany-2 and 3.8 kilometres northeast of Mahogany-3. Oil bearing sands have been encountered on prognosis with 15 metres of net pay in the main Jubilee reservoirs.

Below the main Jubilee reservoirs, the well has intersected 20 metres of net oil pay in a new sand, a 4 metre wet gas sand and 4 metres of net oil pay in Mahogany Deep-aged reservoirs. The potential of these underlying reservoirs will be investigated with further exploratory wells in the area.

Mahogany-4 was drilled by the Atwood Hunter semi-submersible rig to a depth of 3,680 metres in a water depth of 1,079 metres. Following the conclusion of operations, the rig will move to drill the J-03 Jubilee development well. Also in the West Cape Three Points licence, approximately 5 kilometres southwest of the Mahogany-4 well, the Aban Abraham drillship has commenced drilling Mahogany Deep-2. The well will appraise the field’s southern extent and a result is expected in November.

Tullow has a 22.896% interest in the West Cape Three Points licence and its partners are Kosmos Energy (Operator) and Anadarko Petroleum Corporation, (30.875% each), the E.O.Group (3.5%), Sabre Oil & Gas (1.854%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest).

Commenting today, Angus McCoss, Exploration Director, said:
“Extending the Jubilee field eastwards with the Mahogany-4 well and encountering new hydrocarbon bearing reservoirs is an excellent result and strongly supports our current interpretation of the Jubilee field resources. We look forward to drilling the two remaining wells in the current Jubilee appraisal programme by early next year to further refine our understanding of the upside potential.




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