Hart Energy Publishing

Tullow Reports Tweneboa-1 Well Offshore Ghana Encountered Oil-Bearing Sands

March 25, 2009
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Tullow Oil Plc, London, (London: TLW) reports that the deeper section of the Tweneboa-1 exploration well offshore Ghana has encountered oil-bearing sands.


The well was drilled to 3,938 meters in the deepwater Tano license and encountered four meters of highly pressured oil-bearing sands and an over-pressured zone at total depth. Wireline logs, pressure measurements and sampling show that the well has encountered oil of 26 degrees API that is independent of the shallower light hydrocarbon accumulation. Near the total depth of the well, an over-pressured zone was encountered which limited further progress.


Integration of the seismic and well data is ongoing and further exploration drilling will now be required to test the extent of these deeper levels as well as the shallower accumulation where seismic indicates sands thicken away from the well location.
Tullow owns 49.95% of the prospect and is partnered by Kosmos Energy (18%), Anadarko Petroleum (18%), Sabre Oil & Gas (4.05%) and the Ghana National Petroleum Corp. (10% carried interest).


Tullow exploration director Angus McCoss says, “Tweneboa is a significant light hydrocarbon discovery which has extended the Jubilee play westwards and has identified oil in a deeper sand pointing to scope for further play development. We look forward to exploring these multiple targets offshore Ghana and pursuing these plays across the rest of our extensive equatorial Atlantic acreage position.”