HONG KONG, May 3 (Reuters) - China National Petroleum Corp. (CNPC), the parent of top Asian oil and gas producer PetroChina Co. Ltd. (0857.HK: Quote, Profile , Research) (PTR.N: Quote, Profile , Research), said on Thursday it has made a discovery in Bohai Bay with crude oil and gas reserves of 1 billion tonnes of oil equivalent.

The discovery in the company’s Jidong oilfield contains proven reserves of 405.07 million tonnes of oil equivalent, the company said in a statement. Listed PetroChina’s President, Jiang Jiemin, said in March that the firm had made China’s biggest oil find in a decade in Bohai Bay.