CNOOC International is a subsidiary of China National Offshore Oil Corporation (CNOOC), which is the largest offshore oil and natural gas producer in China. Established in 1982, CNOOC has developed into a global energy enterprise with operations in over 40 countries and regions.

CNOOC International focuses on upstream activities, including the exploration, development, and production of crude oil and natural gas. The company engages in both conventional and unconventional resources, such as shale oil and gas and oil sands. Its services encompass oil and gas exploration and development, engineering and technical support, refining and marketing of petroleum products, and natural gas production and power generation. CNOOC International serves a diverse range of customers, including national oil companies and international energy firms, reflecting its extensive global presence.