CNOOC commences production of Wenchang 13-6 oilfield CNOOC announced that its Wenchang 13-6 oilfield has commenced production. Wenchang 13-6 oilfield, located in the west of Pearl River Mouth Basin with an average water depth of approximately 120 meters, is part of the Wenchang oilfields and shares the existing adjacent facilities for the development. The main production facilities include one wellhead platform and 12 producing wells. There are currently 5 wells producing approximately 1,300 barrels per day. Wenchang 13-6 is an independent oilfield in which the company holds 100% interest and acts as the operator.