- 中国海洋石油总公司 zhōngguóhǎiyángshíyóuzǒnggōngsī CNOOCChina National Offshore Oil Corporation; abbreviated as [[中海油|中海油|zhong1 hai3 you2]]
- 中国海洋石油集团有限公司 zhōngguóhǎiyángshíyóujítuányǒuxiàngōngsī CNOOC GroupChina National Offshore Oil Corporation, the major state-owned national oil company focused on offshore exploration and production
