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Tullow Oil Announces Successful Mahogany-2 Appraisal Well, Offshore Ghana

Source: www.gulfoilandgas.com 5/6/2008, Location: Africa

Tullow Oil plc announced that the Mahogany-2 well, which is being drilled to appraise the Jubilee field offshore Ghana, has intersected a significant column of light oil. Results of drilling, wireline logs and samples of reservoir fluid, indicate that Jubilee is a single continuous stratigraphic trap extending at least 11km to the Hyedua-1 discovery well in the adjacent Deepwater Tano licence.

Mahogany-2, which lies in the West Cape Three Points licence, is the first appraisal well on the Jubilee field and is targeting the Turonian turbidite sandstones encountered in the Mahogany-1 and Hyedua-1 discovery wells. The well has encountered a gross reservoir interval of 243 metres, containing 63 metres of high quality stacked reservoir sandstones, and net hydrocarbon-bearing pay of 50 metres. Results of logging and pressure testing indicate that the combined hydrocarbon columns are in excess of 600 metres.

Analysis of the oil samples from the Mahogany-1 discovery well had suggested the potential for a gas cap at the Mahogany-2 location. No gas cap has however been encountered in this well thereby indicating the potential for the Jubilee field to extend further up-dip of this location.

A limited flow test will now commence on Mahogany-2 to determine potential production rates from these excellent quality reservoirs and to collect further oil samples for analysis. Testing is expected to take approximately four weeks and the well will then be suspended for use as a potential development well.

Mahogany-2 has been drilled to a total depth of 3,443 metres by the Songa Saturn drillship in water depths of 1,080 metres. Three more Jubilee appraisal wells are planned for 2008 and will be drilled by the Blackford Dolphin semi-submersible. The next Jubilee appraisal well, Hyedua-2, is expected to commence in July in the adjacent Deepwater Tano licence in which Tullow has a 49.95% interest.

Tullow has a 22.9% interest in the West Cape Three Points licence. Other partners include Kosmos Energy (Operator 30.875%), Anadarko Petroleum (30.875%), the E.O.Group (3.5%), Sabre Oil & Gas (1.854%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest). Tullow is the Unit Operator of the Jubilee field.

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Related Articles: Artificial Lift  Cementing, Stimulation  Directional Drilling  Drilling  Drilling Engineering & Equipment Systems  Enhanced Oil Recovery  General  Logging, Perforating, Testing  Offshore Drilling  Reservoir/Completion Consultants  Workover & Well Services  Workover Rigs/Services 


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