BP discovers more gas resources at Greater Tortue Ahmeyim project

Exploration & Production

Oil major BP has expanded a natural gas resource potential at the Greater Tortue Ahmeyim gas project, which is located offshore Mauritania and Senegal.

ENSCO DS-12, previously known as Atwood Achiever. Image: BP
Ensco DS-12 drillship, previously known as Atwood Achiever. Image: BP

Kosmos Energy, BP’s partner in the project, said on Monday that the Greater Tortue Ahmeyim-1 well (GTA-1), drilled on the eastern anticline within the unit development area of Greater Tortue, had encountered approximately 30 meters of net gas pay in high-quality Albian reservoir.

The Greater Tortue Ahmeyim LNG project is on track to deliver first gas in the first half of 2022, and the well, which has been designed as a future producer, will be used to further optimize the development drilling plans for the BP-operated project, Kosmos added.

Commenting on the results of the GTA-1 well, Chairman and Chief Executive Officer, Andrew G. Inglis, said: “The GTA-1 well confirms our expectation that the gas resource at Greater Tortue Ahmeyim will continue to grow over time and could lead to further expansion of this world-scale 10 MTPA LNG project.

“In addition, Kosmos’ process to sell down its interest to 10 percent has received considerable interest from the industry, with initial bids expected over the summer, and transaction conclusion anticipated by year-end.”

Located offshore Senegal, the GTA-1 well was drilled in approximately 2,500 meters of water, about 10 kilometers inboard of the Guembeul-1A and Tortue-1 wells, to a total depth of 4,884 meters.

The 2013-built drillship Ensco DS-12 rig, working on behalf of the operator BP, will now drill the Yakaar-2 appraisal well in Senegal, which is expected to spud in the coming weeks, before drilling the Orca-1 exploration well in Mauritania, which is expected to spud late in the third quarter.

Partners in the cross-border Greater Tortue Ahmeyim project, located offshore Mauritania and Senegal, include SMPHM, Petrosen, BP, and Kosmos.

BP sanctioned the Greater Tortue Ahmeyim project in December 2018. Following the FID, BP has awarded several contracts for the project, including the one for EPCIC of FPSO to TechnipFMC and a contract for SURF and SPS  to McDermott and Baker Hughes, a GE company (BHGE).


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