CNOOC â Tianjin completed a new field wildcat, BZ 18-1-1, in the Bohai offshore in mid-September 2018. The well is located in the Bozhong Depression at a water depth of around 30 m. It was spudded in mid-August 2018, with target for the Tertiary sands play. âBohai 5â J/U is used for the drilling operation.  BZ 18-1-1 is drilled in a relatively central part of the Bozhong Depression where is less well has been drilled mainly due to deep target. Several discoveries have made around this area, such as BZ 21-2, BZ 22-1, BZ 22-2 and BZ 23-3, but without commercial value.   In the recent few years, CNOOC made several discoveries in the Bozhong Depression, such as BZ 19-6 and BZ 29-6, they have been confirmed to be hundred-million tons oil equivalent scale discovery. In particular, BZ 19-6 is a large gas field with main reservoir in pre-Cambrian basement at a depth below 4,000 m. This discovery indicated a deep gas play in the Bozhong Depression.
China, Bozhong