CNOOC, Nexen Reapply for Merger Approval in US

By mutual agreement with the Committee on Foreign Investment in the United States (CFIUS), CNOOC Limited

and Nexen Inc.

withdrew and resubmitted a Joint Voluntary Notice with respect to the proposed acquisition of Nexen by CNOOC Limited. Discussions with CFIUS continue, with a view to completing the CFIUS review process as expeditiously as possible. The closing of the arrangement remains subject to the receipt of applicable government and regulatory approvals, by the relevant authorities in Canada, the U.S., the EU and China, and the satisfaction or waiver of the other customary closing conditions.