Eni proves more oil in prolific offshore Ghana block

July 7, 2021
Eni has discovered a second large oil field on the CTP block 4 offshore Ghana.

Offshore staff

SAN DONATO MILANESE, Italy – Eni has discovered a second large oil field on the CTP block 4 offshore Ghana.

The well on the Eban prospect followed the Akoma discovery. Preliminary estimates suggest the combined in-place potential of the Eban-Akoma complex in the range 500-700 MMboe.

Eban - 1X was drilled by the drillship Saipem 10000 in 545 m (1,788 ft) of water, 50 km (31 mi) offshore and 8 km (4.98 mi) northwest of the Sankofa hub, where the FPSO John Agyekum Kufuor is located.

The well, which reached TD of 4,179 m (13,711 ft), encountered an 80-m (262-ft) light oil column in a thick sandstone reservoir interval of Cenomanian age, with hydrocarbons down to 3,949 m (12,956 ft) TVD.

Eni based its assessments of the results on analysis of extensive 3D seismic datasets and well data acquisition, including pressure measurements, fluid sampling, and intelligent formation testing.

Pressure and fluid data (oil density and gas-to-oil ratio) and reservoir properties are consistent with those at Akoma and the nearby Sankofa field. Data from production indicate potential well flow rates of 5,000 b/d, similar to wells in production at Sankofa.

The Sankofa field and the Eban-Akoma complex are now thought to hold more than 1.1 Bboe, and further upside could be confirmed via appraisal drilling.

Eni sees potential for a fast-track subsea tie-in to the FPSO, thereby extending its production plateau as well as increase throughput.

Other partners in CTP block 4 are Vitol, GNPC, Woodfields and GNPC Explorco.