CNOOC Ltd. has appraised two wells in Qinghuangdao 29-2 east in China, encountering oil and natural gas pay.
These two appraisal wells expanded the reserve base of Qinghuangdao 29-2, which is located in the central north of Bohai, with an average water depth of about 27 m (89 ft).

Qinghuangdao 29-2E-4 drilled in the middle formation of the Qinghuangdao 29-2 east structure represented a significant breakthrough by encountering 218.4 m (923 ft) thick of oil pay zones, including a 133.7 m (439 ft) thick single oil pay zone, CNOOC Ltd. reported. This well was tested to produce approximately 6,600 bbl and 4.5 MMcf of natural gas per day, creating the highest capacity of clastic rocks in Bohai.