The giant Zakum field is located centrally within Abu Dhabi's offshore area. The field produces light sour crude (34o 40o API) from Cretaceous carbonates. The Lower and Upper Zakum developments are operated under two separate joint ventures. ExxonMobil was awarded a 28% stake in the field in 2006 with the aim of increasing production capacity to 750 000 b/d and maintain that plateau for 25 years achieving 70% oil recovery. The development includes the construction of four artificial islands to provide a land base for the drilling rigs and processing facilities.