With the guidance of seismic sedimentology theory, the seismic sedimentology study was carried out in the Bin-4 oil group of the second member of Shahejie Formation in Qibei Sag based on the research of seismic lithology and geomorphology. According to the geophysical response features of complex lithologies, the log parameter inversion constrained by relative acoustic impedance was conducted to obtain lithologic data. With the help of logging and well drilling data, the stratal slices were interpreted. The result shows that log parameter inversion can be used to distinguish the complex lithologies. The source direction, evolutional history and reservoir distribution characteristics of the sandstone of delta-lacustrine depositional system in Bin-4 oil group were clearly delineated by a series of stratal slices produced
under the isochronous stratigraphic framework.