Abstract: The shahejie 3 member of Lenjiapu Oil Field, Liaohe is subaqueous fan deposition of abrupt slope naer shore. Heterogeneous degrees of surface and within in reservoirs are high. There are 4 types (subdivided into 20 Kinds) models of rhythm. Low-permeable differential fine throsts are main kinds of porous strucures. Shale contant, minerals distribution of clay, sedimentation and cpidiagenesis arc important factors of influencing reserviors properties.