Underwater distributary channel deposit sandstones with good porosity and permeability are developed widely in the Chenghao-Nanliang area, and are the favorable places for oil and gas accumulation.

• 区内广泛发育的水下分流河道沉积微相砂岩具有孔隙度和渗透率都较好的物性条件，是有利的油气聚集场所。