Cnooc 

CNOOC Limited, an investment holding firm, is primarily involved in the full spectrum of crude oil and natural gas operations, encompassing their discovery, development, production, and subsequent sale. The company organizes its activities into two core divisions: Exploration & Production (E&P) and Trading. Key offshore regions for its crude oil and natural gas output within China include Bohai, the Western and Eastern South China Sea, and the East China Sea. Beyond its domestic operations, CNOOC also holds stakes in diverse oil and gas ventures spanning Asia, Africa, North America, South America, Oceania, and Europe. Additionally, its business scope extends to the trading of petroleum and natural gas, the exploration, development, and extraction of oil sands, and the pursuit of unconventional natural gas resources, such as shale gas, within mainland China. Founded in 1999 and based in Central, Hong Kong, CNOOC Limited maintains a broad international presence, operating in countries like China, Indonesia, Iraq, Russia, Canada, the United States, the United Kingdom, Nigeria, Uganda, Argentina, Brazil, Guyana, and Australia. It functions as a subsidiary of China National Offshore Oil Corporation.