Tortue DST results confirm development parameters offshore Mauritania

Kosmos Energy has completed the drillstem test of the Tortue-1 well in block C-8 offshore Mauritania.

Offshore staff

DALLAS– Kosmos Energy has completed the drillstem test (DST) of the Tortue-1 well in block C-8 offshore Mauritania.

TheTortue-1 well flowed at a sustained, equipment-constrained rate of about 60 MMcf/d during the main, extended flow period, with minimal pressure drawdown. This, Kosmos says, provides confidence in well designs that are each capable of producing approximately 200 MMcf/d.

The DST results confirmed a connected volume per well consistent with the current development scheme, which together with the high well rate is expected to result in a low number of development wells compared to equivalent schemes. Initial analysis of fluid samples collected during the test indicate Tortue gas is well suited for liquefaction given low levels of liquids and minimal impurities.

The company says that data acquired from the DST will be used to further optimize field development and to refine process design parameters critical to the front-end engineering and design process anticipated to begin later this year.

Chairman and CEOAndrew G. Inglis said: “The positive results from the DST confirm that the Tortue field is a world-class resource and validates the assumptions that underpin our development concept. The combination of high well rates, large connected volume per well together with a gas well-suited for liquefaction is why we believe Tortue is one of the lowest cost pre-FID greenfield LNG projects.”

“TheKosmos BP partnership remains aligned on delivering a final investment decision for the project in 2018 and first gas in 2021,” he added.

The Tortue-1 well is located in 2,700 m (8,858 ft) of water. The DST was conducted by theAtwood Achiever drillship, which has now mobilized to the Hippocampe prospect in block C-8 to begin exploration drilling.

Kosmos is exploration operator of block C-8 with a 28% participating interest. BP is named operator with a 62% participating interest, and Societe Mauritanienne des Hydrocarbures et de Patrimoine Minier has a 10% participating interest.


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