CALGARY, Sept. 20, 2012 /PRNewswire/ - Nexen Inc. (TSX, NYSE: NXY) announced today that the holders of its common shares and the holders of the cumulative redeemable class A rate reset preferred shares, series 2 (the "preferred shareholders") have approved the Plan of Arrangement, pursuant to the Arrangement Agreement entered into on July 23, 2012 (the "arrangement"), in connection with the proposed acquisition of Nexen Inc. by CNOOC Limited through CNOOC Canada Holding Ltd. The arrangement was approved by approximately 99% of the votes cast by Nexen common shareholders and approximately 87% of the votes cast by Nexen preferred shareholders at the special meeting held on September 20, 2012. The closing of the arrangement remains subject to the granting of the final order by the Court of Queen's Bench of Alberta, the receipt of required regulatory approvals and the satisfaction or waiver of the other customary closing conditions. Nexen Inc. is an upstream oil and gas company listed on the Toronto and New York stock exchanges under the symbol NXY. Nexen operates oil sands and shale gas in Western Canada and conventional exploration and development primarily in the UK North Sea, offshore West Africa and Gulf of Mexico. Forward-looking statements & Information This press release contains forward-looking statements and forward-looking information within the meaning of applicable securities laws and which are based on the expectations, estimates and projections of management of the parties as of the date of this news release unless otherwise stated. The use of any of the words "expect", "anticipate", "continue", "estimate", "objective", "ongoing", "may", "will", "project", "should", "believe", "plans", "intends" and similar expressions are intended to identify forward-looking statements or information. More particularly and without limitation, this press release contains forward-looking statements and information concerning: the anticipated benefits of the transaction to the parties, their respective securityholders and certain of the countries in which Nexen operates; the timing and anticipated receipt of required regulatory and court approvals for the transaction; the ability of the parties to satisfy the other conditions to, and to complete, the transaction; and the anticipated timing of the closing of the transaction.