TWO gas discoveries offshore Mauritania and Senegal have been successfully delineated by New York-listed Kosmos Energy’s Ahmeyim 2 appraisal well, the company has announced.

Drilled to a total depth of 5,200 metres about 5 kilometres northwest of the Tortue 1 discovery well, the Ahmeyim 2 well penetrated the seismic-inferred gas-water contacts, defining the field limit and extending the productive field area from about 50 square kilometres to 90 square kilometres.

The well encountered 78 metres of net gas pay in two excellent quality reservoirs, including 46 metres in the Lower Cenomanian and 32 metres (105 feet) in the underlying Albian.

Kosmos said the results demonstrated field-wide reservoir continuity, indicating that Tortue West was a large, simple gas field and allowing the company to increase its gross resource estimate for the structure to 15 trillion cubic feet (Tcf) from 11 Tcf.

Kosmos chief executive Andrew Inglis said the well was its fourth success in that petroleum system offshore the two nations.

“We believe we have proven sufficient gas resource to underpin a world-scale LNG project in the Tortue West structure,” he said.

“The combination of the resource size and quality continue to support our view that Tortue is a competitive source of LNG and we are working towards commercialisation.”

“We now plan to drill the first of three independent oil tests in our blocks offshore Mauritania and Senegal, starting with the Teranga-1 well, located in the Cayar offshore profond block, offshore Senegal.”

Kosmos operates the Ahmeyim-2 well with 90 percent equity and is joined by its partner the Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM) at 10 per cent.

The blocks are contiguous, range in water depth between 1,000 and 3,000 metres, and have combined acreage of about 27,000 square kilometres.