Chevron subsidiary Chevron Mauritania Exploration Limited has reached agreement to acquire a 30% non-operated working interest in offshore blocks C8, C12 and C13 from Kosmos Energy. Kosmos is preparing to drill a well on the Tortue prospect, using the Atwood Achiever drillship. Chevron will not initially fund the well, but retains the option to participate in Tortue after the transaction is completed. Kosmos retains a 60% interest in the blocks and remains the operator, while state oil company Société Mauritanienne des Hydrocarbures et du Patrimoine Minier has a 10% carried interest.