Ghana's Owo light oil field extended, renamed

By OGJ editors
– A Tullow Oil PLC group successfully appraised its Owo light oil field discovery off Ghana, and the field has been renamed Enyenra.

The Enyenra-2A appraisal well confirmed a downdip extension of the field discovered by the Owo-1 well in 2010 on the Deepwater Tano block. Enyenra-2A encountered oil and gas-condensate in high-quality stacked sandstone reservoirs.

Located more than 7 km south of the discovery well, Enyenra-2A was drilled to intersect the upper channel in which oil was discovered by the Owo-1 and Owo-1 sidetrack wells and the lower channel where gas-condensate was found in the Owo-1 sidetrack.

Results of drilling, wireline logs, reservoir fluid samples, and pressure data show that Enyenra-2A cut 21 m of oil pay in the upper channel and 11 m of oil pay in the lower channel.

Pressure data from the upper channel indicate Enyenra-2A to be in communication with Owo-1. Pressures in the lower channel suggest communication with the deeper pools in the two Owo wells.

Enyenra-2A also tested a distal portion of a deeper Turonian-age fan where 5 m of gas-condensate sandstones were intersected. An evaluation of the extent and thickness of this new play continues.

The Deepwater Millennium dynamically positioned drillship drilled Enyenra-2A to 13,891 ft total depth in 5,492 ft of water. After logging, the group will suspend the well for future use. The drillship will stay on the block to drill the Tweneboa-4 well.

Tullow operates the block with 49.95% interest. Kosmos Energy Corp., Dallas, and an affiliate of Anadarko Petroleum Corp. each hold 18%. Sabre Oil & Gas Holdings Ltd. has a 4.05% interest, and Ghana National Petroleum Corp. has a 10% carried interest.

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