CNOOC has made a major breakthrough in ultra-deep oil and gas exploration in the central Bohai Sea

China News Service, Beijing, November 12 (Reporter Wang Enbo) China National Offshore Oil Co., Ltd. announced on the 12th that it discovered a high-yield oil and gas well in volcanic rock in an ultra-deep formation exceeding 5,000 meters in the Bohai Sea, marking a major breakthrough in China's offshore ultra-deep natural gas exploration.

The well is located in the central waters of the Bohai Sea, close to the Bozhong Sag, the largest hydrocarbon-rich depression in the Bohai Sea. A total of more than 120 meters of natural gas layers have been drilled in the volcanic rock strata, and the drilling depth was 5,770 meters. After testing, the well produced about 800,000 cubic meters of natural gas per day, demonstrating broad exploration prospects in the field of offshore ultra-deep volcanic rocks and effectively promoting the natural gas exploration process in the Bozhong Depression.

On November 12, China National Offshore Oil Corporation announced that it had discovered a high-yield oil and gas well in volcanic rock during drilling in ultra-deep strata of over 5,000 meters in the Bohai Sea. This is the Bohai Sea ultra-deep exploratory well operation site. (Photo courtesy of CNOOC)

According to reports, the ultra-deep geological conditions in the Bohai Sea are complex and reservoir prediction is difficult. CNOOC has independently developed key technologies for offshore deep multi-source broadband stereo seismic exploration, innovated high-quality reservoir prediction methods in ultra-deep buried hills, accurately targeted the favorable enrichment area of ultra-deep volcanic rock natural gas in the Bozhong Sag, and discovered high-yield oil and gas wells, achieving an important breakthrough in the exploration of ultra-deep volcanic rock natural gas in the Bohai Sea.

Xu Changgui, chief scientist and chief geologist of China National Offshore Oil Corporation, said that in recent years, CNOOC has continued to increase theoretical innovation and key technological research on deep-ultra-deep oil and gas enrichment in basins with high heat flow and strong activity. China's sea exploration has achieved a major leap from shallow to deep-ultra-deep. The successful drilling of this well opened up a new area for offshore ultra-deep natural gas exploration and expanded the deep oil and gas exploration space in the Bohai Sea. It is of positive significance for accelerating the ultra-deep exploration process in the Bohai Sea and building a trillion-square-meter atmospheric area in the Bohai Sea. (over)