This research will try to resolve the distribution and controlling factors of gas layers by the study of division of substrata in bawu gas field . the main reservoir of bawu gas field are the sand layers in the formation of k1sh , k1y , k1d , k2q , sediment delta plane , delta frontier , plait delta developing distributary riverway sand , bayou sand dam , far sand dam and river sand of plait 八屋气田主要储层为早白垩世的沙河子组( k _ 1sh ) 、营城组( k _ 1y ) 、登娄库组( k _ 1d )及晚白垩世的泉头组( k _ 2q ) ，为三角洲平原、三角洲前缘及辫状河三角洲沉积体系，发育分流河道砂、河口砂坝、远砂坝、辫状河道砂等，砂层在平面上连通性差。
