Tullow gauges light oil discovery off Ghana

Feb. 25, 2008
Tullow Oil PLC said it gauged light, 29° gravity oil in the Gulf of Guinea off Ghana at an exploratory well that opens a new play.

By OGJ editors
HOUSTON, Feb. 25 -- Tullow Oil PLC said it gauged light, 29° gravity oil in the Gulf of Guinea off Ghana at an exploratory well that opens a new play.

The Odum-1 discovery on the West Cape Three Points License is a stratigraphic trap in a Campanian age fan system and opens a second new play fairway in the Tano basin, the company said. The company has identified further prospectivity in the Campanian play on the West Cape Three Points and Deepwater Tano licenses.

Odum-1, drilled to 3,387 m in 955 m of water 13 km from Jubilee field, encountered 22 m of net pay in a 60-m gross oil column. It is suspended as a future development well.

The Songa Saturn drillship will move to drill Mahogany-2, the next appraisal well in Jubilee field.

"While appraisal of the upside of Jubilee is ongoing, the field partnership is also working on plans for a phased development of the field. The Eirik Raude fifth generation semisubmersible has been contracted for a minimum of three years and is a critical element in our plan to target first oil in 2010," Tullow said.

Meanwhile, Tullow plans to redrill its Ngassa-1 high-angle well on Block 2 in Uganda from an alternative location. TD is 1,635 m.

The well cut 6 m of net gas bearing sands, and thick claystone seals provided good encouragement about underlying oil prospectivity. However, the primary and secondary oil objectives weren't reached due to persistent borehole instability.