CNOOC Achieves Breakthrough with 5,770-Meter-Deep Gas Well in Bohai Sea Delivering 800,000 m³ Daily

Major Gas Discovery by CNOOC in the Bohai Sea

According to НВ — Техно: China’s CNOOC has announced the successful development of a new natural gas well drilled to a depth of 5,770 meters in the Bohai Sea. This well produces approximately 800,000 cubic meters of gas per day, significantly boosting deepwater gas exploration capabilities in the region. The discovery plays a crucial role in supplying energy to major Chinese cities including Beijing, Tianjin, and Hebei.

Located centrally in the Bohai Sea near the region’s largest oil and gas basin, the Bozhong depression, the well taps into gas-bearing formations exceeding 120 meters in thickness. CNOOC has pioneered proprietary 3D seismic survey techniques and advanced methods for identifying reservoirs within ultra-deep buried structures. These innovations enable effective exploitation of volcanic rock formations situated in a geologically active tectonic zone.

Challenges and Strategic Advances

Due to U.S. sanctions listing CNOOC on the Entity List, the company faces restrictions on accessing American oilfield services, software, and deepwater drilling equipment. This has compelled CNOOC to develop its own technologies to overcome the challenges of working with complex volcanic strata.

The success of this well opens new avenues for ultra-deep offshore gas exploration and expands the scope of deepwater oil and gas development in the Bohai Bay. China’s five-year plan targets producing 440 million tons of oil equivalent by 2030, underscoring the country’s ambitious energy goals.

“This new well highlights China’s commitment to advancing indigenous technologies amid limited access to Western innovations,” said CNOOC representative Xu Changyu.

The development is poised to enhance China’s energy security and impact the global energy market as the country seeks to reduce reliance on imports. Investing in cutting-edge technologies and increasing domestic production capacity form key elements of China’s strategy to meet rising energy demand in the coming years.