There are developed reservoirs with middle high porosity and permeability in the beach sand bar and littoral delta bar of estuary, foreshore-nearshore facies.

• 刚性颗粒组分含量高和塑性颗粒组分含量低、分选好、古地温低、溶蚀作用是东河砂岩形成中高孔、渗储层的主要原因，这也是该套储层的重要特徵。