Chinanews, Chengdu, Mar. 20 – According to the Ministry of Land and Resources, Puguang gas field, located in northeastern Sichuan Province, has a verified reserves of 356 billion cubic meters, ranking it China’s second largest gas field. It is the first time for China to discover a large gas field in Sea Facies Stratum.Currently 90% of oil and gas reserves are discovered in Sea Facies Stratum, covering an area of 450 million square meters in China. Chinese scientists mainly from Sinopec and University of Petroleum started to put efforts into prospecting for oil and gas in Sea Facies Stratum in the 1950s.Ma Yongsheng, a manager from Sinopec Southern Branch said that some 20 gas wells have been drilled around the region, and almost every well is productive. He pointed out that such record is rare even by the world standard.