Abstract: Considering the meander river sand bodies at late high water cut stage which is under dense pattern,with the core,well logging and production data,the analysis hierarchy method is applies in subsurface architecture anatomy.According to this method,five architecture hierarchies including sedimentary units,sedimentary facies,single meandering belt,single point bar and lateral accretion bodies are identified and analyzed.Based on a large amount of modern deposition data and outcrop research,this paper introduces the relationship between width/thickness ratio of sand body and lateral accretion interlayer′s dip angel.Lateral accretion interlayer′s scale and model of river sand body are developed and the four parameters of lateral accretion interlayer including dip direction,dip angel,expanded range and horizontal range are described.Using sequential indicator simulation method and human computer exchange method,3D reservoir architecture model are established with Direct software.The method improve the efficiency of 3D architecture stochastic modeling of reservoir.According to different relations of 3D reservoir architecture model and injection production well patterns,three recovery measures for the remaining oil in lateral accretion shale bedding are proposed.Better measurement results are obtained.

Key words: meandering river sand body, internal architecture, geological modeling, heterogeneity, potential tapping measures