In early May 2019, industry sources suggested that Kosmos withdrew from block C-18, deep waters of the Senegal (M S G B C) Basin, northern offshore Mauritania. It is assumed that BP which is the strategic partner of Kosmos in the region took over the 15% offloaded by Kosmos. The new right-holding situation would thus be: Total, operator with 45%, BP with 30%, Tullow with 15% and state company SMHPM with 10%.  Shortly after completing a 3D seismic survey on block C-18 in May 2017, Tullow farmed out a stake in the permit to Kosmos. In late 2017, Total farmed into C-18 and took operatorship from Tullow.  Block C-18 is on the Upper Cretaceous slope and basin floor which have yielded the very large Tortue (Ahmeyim) and Marsouin gas fields in block C-8. C-18 is also further north in the basin, just next to the C-6 / C-12 boundary where Kosmos drilled the Lamantin wildcat in December 2017. The Lamantin results were disappointing as the well only found oil shows.
In early May 2019, industry sources suggested that Kosmos withdrew from block C-18, deep waters of the Senegal (M S G B C) Basin, northern offshore Mauritania. It is assumed that BP which is the strategic partner of Kosmos in the region took over the 15% offloaded by Kosmos. The new right-holding situation would thus be: Total, operator with 45%, BP with 30%, Tullow with 15% and state company SMHPM with 10%. 