The first phase of the Hainan LNG terminal is expected to go onstream in 2014 and reach the designed capacity of receiving 2.0 million tonnes of the super-cooled gas per year in 2016, it said.
In connection with the project, Hainan will build China's largest LNG storage and transferring centre, it added.
CNOOC holds a 65 percent stake in the project, while Hainan Development Holdings Ltd has the remainder.
CNOOC is the parent of Hong Kong- and New York-listed CNOOC Ltd .