The drillshipEnsco DS 12 drilled Hippocampe-1 in 2,600 m (8,530 ft) water depth in block C-8, reaching TD of 5,500 m (18,045 ft). It was designed to test Lower Cenomanian and Albian reservoirs charged from the deeper Valanginian – Neocomian source.
Kosmos believes the prospect failed due to a lack of charge access in this part of the play fairway.
Andrew G. Inglis, chairman and CEO, said: “Following on from our Yaakar discovery earlier this year, Hippocampe-1 is the second of four tests of independent prospects located in the outboard basin floor fan fairways in our Mauritania and Senegal acreage.
“Although the well did not encounter oil or gas, it has, together with Yaakar, confirmed the presence of quality cretaceous reservoir in the outboard basin floor fans, which contain multiple leads and prospects, more than 200 km [124 mi] from the north to south through our blocks.
“We are still in the early stages of opening this newly emerging basin and our forward drilling program remains unchanged given the independent nature of the prospect tests, in particular with regard to charge.”
TheDS 12 will next sail to block C-12 to test the Lamantin oil prospect, 80 km (49.7 mi) offshore and 180 km (112 mi) northeast of Hippocampe in 2,185 m (7,168 ft) of water. Lamantin comprises Campanian reservoirs charged from the shallow, immediately underlying, oil-prone and oil-mature Albian and Cenomanian–Turonian source rocks.