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West African LNG project planned by Kosmos Energy

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LNG Industry,

Kosmos Energy has announced that its Ahmeyim-2 appraisal well has successfully delineated the Ahmeyim and Guembeul gas discoveries located offshore Mauritania and Senegal.

Ahmeyim-2 was drilled to a depth of 5200 m, and is located in Mauritanian waters, approximately 5 km northwest and 200 m downdip of the basin-opening Tortue-1 discovery well in approximately 2800 m of water.

In the lower Cenomanian and Albian, the well penetrated the seismic-inferred gas-water contacts, defining the field limit and extending the productive field area to approximately 90 km2 (originally 50 km2). In addition to this, the well confirmed significant thickening of the gross reservoir sequences down-structure and within the Lower Cenomanian, static fluid pressure communication between the Tortue-1, Guembeul-1 and Ahmeyim-2 wells. 78 m – or 256 ft – of net gas pay was encountered by the well in two excellent quality reservoirs. This included 46 m – or 151 ft – in the Lower Cenomanian, as well as 32 m – or 105 ft – in the underlying Albian. The results show that Tortue West is a large, simple gas field, and demonstrate field-wide reservoir continuity.

As a result of extending the field area into the Cenomanian and Albian, Kosmos Energy’s mean gross resource estimate for the Tortue West structure has now increased from 11 trillion ft3m to 15 trillion ft3.

The Chairman and CEO, Andrew G. Inglis, said: “Ahmeyim-2 is our fourth successful exploration and appraisal well and continues our 100% success rate in the outboard Cretaceous petroleum system offshore Mauritania and Senegal, further demonstrating that Kosmos has opened a world-class hydrocarbon province. With this well, we believe we have proven sufficient gas resource to underpin a world-scale LNG project in the Tortue West structure alone. 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.

“Our well-to-seismic calibration has again been proven, highlighting the reliability of this tool and increasing our confidence in its use for fully unlocking the basin, which we believe has significant potential for both oil and gas. 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.”

Under production sharing contracts with Mauritanian Government’s Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM), Kosmos has held the right explore the C-8, C-12 and C-13 contract areas since 2012. SMHPM holds 10% equity in the Ahmeyim-2 well, whilst Kosmos operates it and holds 90% equity. The contiguous blocks have water depths ranging from 1000 m to 3000 m. Combined, they cover approximately 27 000 km2.

Edited from press release by David Rowlands

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