Daniel Nonor
8 January 2009
Ghana's oil find has received another facelift as TULLOW announced it has achieved successful drilling results from the Hyedua_2 appraisal well offshore. The success of this well has substantially increased the proven areal extent of the Jubilee field and is likely to lead to material upgrades of current resource estimates.
Hyedua_2, Deepwater Tano, offshore Ghana, the Hyedua_2 appraisal well, which is being drilled to appraise the Jubilee field offshore Ghana, has intersected a significant light oil column.
Results of drilling, wireline logs and samples of reservoir fluid indicate an extension of the Jubilee field some 4km northwest of the Mahogany-1 discovery well in the West Cape Three Points license and 5km north of the subsequent Hyedua_1 discovery well in the Deepwater Tano license.
Hyedua-2 is located in the Deepwater Tano block and is the second appraisal well on the Jubilee field. The well has encountered a gross reservoir interval of 120 meters containing approximately 55 meters of high quality oil bearing reservoir sandstones.
A drill stem test will now commence on Hyedua-2 to determine potential production rates 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.
The Blackford Dolphin semisubmersible drilled Hyedua_2 to a total depth of 3,663 meters in water depths of 1,246 meters. On completion of testing the rig will move to a new location to drill a Jubilee development well before performing a drill stem test on the Mahogany-1 discovery well.
The Eirik Raude semisubmersible is currently drilling the Mahogany-3 exploratory-appraisal well in the West Cape Three Points license, where Kosmos is the block operator.
This well is targeting an extension of the Jubilee field to the southeast and is being extended to intersect a deeper exploration prospect, Mahogany Deep. Mahogany-3 is expected to reach Total Depth in approximately four weeks. Once the well is complete, the partnership expects to provide an update to Jubilee's current estimated resource range of 500 million to 1.8 billion barrels.
Tullow (49.95%) operates the Deepwater Tano license. Other partners include Kosmos Energy (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum Corporation (GNPC) (10% carried interest). Tullow is also the Unit Operator of the Jubilee field.
Commenting today, Aidan Heavey, Chief Executive said, "Encountering significant hydrocarbon columns outside of the proven area of the Jubilee field is an outstanding result. Our continued successes will likely lead to material upgrades of current resource estimates with the Hyedua_2 result underpinning the requirement for additional phases of development on the Jubilee field."
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