Monday 5 February 2018

Requin Tigre-1 was drilled to a total depth of 5,200 meters and was designed to evaluate Cenomanian and Albian reservoirs in a structural-stratigraphic trap, charged from an underlying Neocomian-Valanginian source kitchen. The prospect was fully tested but did not encounter hydrocarbons. Post-well analysis is currently ongoing to determine the reasons it was unsuccessful. The exploration insights from the well, together with our existing knowledge will provide competitive advantage, and meaningfully advance our working understanding of the deepwater Cretaceous petroleum systems offshore Mauritania and Senegal where we believe there is substantial remaining prospectivity in the Company’s large acreage position.

Kosmos was fully carried on the cost of the Requin Tigre well.

The drillship will proceed as planned to test two oil prospects offshore Suriname commencing in early second quarter 2018.

Kosmos holds an effective 30% participating interest in the Saint Louis Offshore Profond license. BP holds a 60% participating interest. The national oil company Société des Pétroles du Sénégal (Petrosen) holds 10%.