The two sides have agreed to jointly exploit energy resources including liquid natural gas (LNG) by transferring CNOOC shares to COSCO Group or co-funding, CNOOC, the countrys third-biggest oil company has said in an announcement on its website.
The two companies will also cooperate on shipbuilding,according to the announcement.
CNOOC and COSCO have been cooperating on transportation of crude oil, oil products, LNG, natural gas pipes and other facilities.
We are complementary to COSCO in business and prospects for mutual cooperation are promising, said Fu Chengyu, chairman and chief executive officer of CNOOC.
CNOOC has reported first half net profits down by 10.6 per cent from the same period last year to 14.55 billion yuan.
COSCO Group is Chinas largest ship repair and marine engineering and shipping group and one of the top shipping conglomerates in the world.