The gas-bearing strata are mainly the Baigang Formastion of Eocene and Fuping Formation of Oli-gocene,then the Nadu Formation of Eocene,and their buried depths are less than 1500 m in general, most of them being 300-700 m.

• 含气层位主要是始新统百岗组和渐新统伏平组,次为始新统那读组,埋深一般小于1500 m,大部分气层埋深在300-700 m之间。