Hong Kong-Chinese offshore producer CNOOC started producing at four oil and gas fields in northern China's Bohai Bay in December, the company said December 30. The Jinzhou 25-1 South and Caofeidian 18- 2 oil and gas fields began commercial operation ahead of schedule, CNOOC said in a statement. Another two oil fields in Bohai Bay, Bozhong 13-1 and Bozhong 34-1 North, also began pumping in December.
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