China achieves major breakthrough in central Bohai’s ultra-deep oil, gas exploration

China National Offshore Oil Corp (CNOOC) announced on Thursday that it has successfully drilled and discovered a high-yield volcanic oil and gas well in ultra-deep formations exceeding 5,000 meters in the Bohai Sea, marking a major breakthrough in ultra-deep natural gas exploration offshore China.

The well is located in central Bohai, adjacent to the Bozhong Sag, the largest hydrocarbon-rich sag in the Bohai Sea, according to the Science and Technology Daily.

The Bohai Sea area is an important natural gas production region in China and one of the key sources for natural gas supply to the Beijing-Tianjin-Hebei region and Bohai Rim region.

The project encountered a cumulative gas pay zone of more than 120 meters in volcanic formations and it was completed at a depth of 5,770 meters. The well tested at approximately 800,000 cubic meters of natural gas per day, revealing promising exploration prospects in the offshore ultra-deep volcanic rocks and effectively advancing the natural gas exploration process in the Bozhong Sag, according to CNOOC.

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