CNOOC Ltd, China’s top offshore crude oil and natural gas producer, has announced the discovery of a major new oilfield in the Bohai Sea. The Qinhuangdao 29-6 discovery in the shallow Neogene formations of the Bohai Sea is yet another oilfield estimated to hold more than 100 million tons of crude, or about 730 million barrels, and discovered by CNOOC recently, the company said. Through continued exploration, the proved in-place volume of Qinhuangdao 29-6 Oilfield has exceeded 100 million tons of oil equivalent. The…