The Canadian unit of Chinese state-controlled energy giant Cnooc Ltd. CEO 2.76 % said Wednesday that it can resume full production at a troubled oil-sands operation after regulatory authorities eased a suspension order that had crimped its output. Cnooc subsidiary Nexen Energy ULC said Alberta’s chief energy regulator amended an order that threatened to shut down its 50,000 barrel a day Long Lake heavy oil extraction facility located in the province’s northeastern boreal forests. “Nexen is able to resume 100% of our operations” at its Long Lake oil sands plant, the company said in a statement. The Alberta Energy Regulator imposed the order late last month for suspected failure to comply with certain rules, effectively rendering the plant inoperable. The AER scaled back that order earlier this month [Sept. 6], which allowed Nexen to operate at three-quarters of its previous production levels. It further revised the order on […]