US firm Kosmos Energy considers LNG the most likely development option for last year’s Tortue West deepwater discovery off Mauritania.

After a third drilling success Kosmos last month raised its “gross resource estimate” for Tortue West to 15 tcf and to “over 20 tcf” for the Greater Tortue Complex. Kosmos discovered the field last year (MEES, 8 May 2015).

The resource straddles the maritime border with Senegal with the next well on the Senegal side of the...