China's first independently-developed and built ultra-deepwater gas field, Shenhai Yihao, or Deep Sea No.1, has recorded an accumulated natural gas output of over 8 billion cubic meters so far, with its oil output exceeding 800,000 cubic meters. The deepest of its kind in China, the Shenhai Yihao ultra-deepwater gas field began operation on June 25, 2021, Xinhua News Agency reported. According to the China National Offshore Oil Corporation (CNOOC), its operator, the construction of the phase II project of Deep Sea No. 1, which aims to upgrade the gas field, is underway. Upon completion, it will control 23 deep-water gas wells and two sets of underwater production systems. Deep Sea No.1, located 150 km from the city of Sanya in south China's island province of Hainan, is able to operate at a maximum depth of over 1,500 meters in the sea. Source: Bahrain News Agency