This paper, based on the drilling, logging, and thin sections of cores, studies the features and production of Sha-3 Member Reservoir of Western depression in Liaohe basin. The Sha-3 Member reservoir is chiefly turbidite, which can be classified into three sub-members, Lianhua oil-bearing bed, Dalinghe oil-bearing bed and Rehetai oil-bearing bed according to their lithology and sedimentation. The later both are the major reservoirs which are sandstone in lithology with clastic grains and low maturity, implying a near source and quick sediment. The petropysical features of reservoir, closely related to facies zone, are largely influenced by sedimentary zones, the maturity of clastic components, post-diagenesis, cementation and corrosion, etc.
