Tullow makes oil discovery off Ghana

Tullow Oil said that it has discovered oil-bearing sands in the deeper section of the Tweneboa-1 exploration well offshore Ghana.

Eric Watkins
OGJ Oil Diplomacy Editor

LOS ANGELES, Mar. 25 -- Tullow Oil PLC, following the significant light hydrocarbon discovery it reported earlier this month, said that oil-bearing sands have been discovered in the deeper section of the Tweneboa-1 exploration well offshore Ghana.

"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," Tullow said.

"We look forward to exploring these multiple targets offshore Ghana and pursuing these plays across the rest of our extensive Equatorial Atlantic acreage position," the company said.

In reporting the discovery, Tullow said, "The Tweneboa-1 well has been deepened to 3,938 m and encountered 4 m of highly-pressured oil-bearing sands as well as an over-pressured zone at total depth."

The results of wireline logs, pressure measurements, and sampling show that the well has found 26° gravity oil, which is independent of the shallower light hydrocarbon accumulation, the company said.

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 said.

The Tweneboa-1 well was drilled by the Eirik Raude deepwater rig in a water depth of 1,148 m about 25 km west of the Jubilee field.

Tullow, with 49.95%, operates the Deepwater Tano license and is partnered by Kosmos Energy 18%, Anadarko Petroleum Corp. 18%, Sabre Oil & Gas 4.05%, and Ghana National Petroleum Corp. 10% (carried interest).

Contact Eric Watkins at hippalus@yahoo.com.

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