Nexen Annoucnes All Approvals Received from CNOOC Deal

Nexen Inc.

announced today that Nexen has received approval from the Committee on Foreign Investment in the United States (CFIUS) with respect to the proposed acquisition of Nexen by CNOOC Limited, and now has all of the requisite approvals to proceed to close. The transaction is expected to close the week of February 25, 2013 and remains subject to customary closing conditions.