CNOOC Ltd. encountered a high yield well in the Wushi Sag area of Beibu Gulf offshore China, the company announced July 23.

The Wushi 16-5 structure sits in an average water depth of approximately 25 m. The WS16-5-4 appraisal well was drilled and completed at a depth of 4,185 m, encountering 65 m of oil pay zones.

The well was tested to produce over 1,000 cubic meters per day of oil equivalent. The discovery is expected to become a medium-sized oilfield.

With this discovery, the total proved oil in-place of the Wushi oilfields has exceeded 100 million cubic meters.