CNOOC Ltd, the exploration arm of China National Offshore Oil Corporation (CNOOC), is developing 27 oil and gas fields in the non-disputed waters of the South China Sea, East China Sea and Bohai Bay, most of which are marginal developments or brownfield expansions, writes Xu Yihe.

The fields — eight in Bohai Bay off northern China, one in the East China Sea, 11 in the western South China Sea and seven in the eastern South China Sea — will provide the foundation for CNOOC to achieve its production target of 500 million barrels of oil equivalent by 2020, up from last year’s 469 million boe.