Sprawling Enyenra oil field appraised offshore Ghana

By OGJ editors

Tullow Oil PLC said its Enyenra-4A appraisal well confirmed the existence of oil in good quality sandstone reservoirs in the southern part of Enyenra field offshore Ghana and the company is running injectivity tests to support waterflood design.

The well, which went to 4,174 m in 1,878 m of water at a downdip location on the Deepwater Tano license, is 7 km southwest of the Enyenra-2A well and 21 km south of the Enyenra-3A well. It will be suspended for later use.

Enyenra-4A intersected 32 m of net oil pay. Pressure data from the oil leg shows that the oil is in static communication with the oil seen in the field’s other wells and indicates a 600-m continuous oil column.

Tullow said, “Proving a 600-m oil column over a distance of 21 km with three appraisal wells is a significant achievement which was only possible through the use of highly refined geophysical techniques.”

The Ocean Olympia drillship will return at a later date to drillstem test the oil zone in the Ntomme-2A well, Tullow said.

Tullow operates the Deepwater Tano license with 49.95% interest. Kosmos Energy and Anadarko Petroleum Corp. have 18% each, Sabre Oil & Gas has 4.05%, and Ghana National Petroleum Corp. has a 10% carried interest.

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