Objective: The thick sandbody of the IV2 layer of He3 Formation in the Anpeng main zone, Zhaowa Oilfield is formed by braided channel of middle nearshore subaqueous fan. The complex erosion and superimposition of the braided channel in different time results a complex movement of oil and water and the difficulty of enhancement of oil recovery in development stage. So a detail anatomization of thick sandbody is urgent to reveal the distribution of braided channels and its influence on the remaining oil. Methods：Using the architectural element analysis method,the fine characterization is conducted for the thick sandbody configuration by integrating various data including cores;well logging and production performance data. Six fold hierarchy of the reservoir architectural surface is identified and the vertical and lateral recognition marks of the single sandbody boundary are established within the composite braided channels. The vertical marks include muddy lithologic interface and bottom erosion interface, the lateral marks include top surface elevation difference, difference of thickness, shape difference of well logging curve between different single sandbodies. Based on the single sandbody indentification, the distribution and configuration of thick sandbody between the wells are carried out to reveal the distribution characteristics of single braided channel sandbodies from composite braided channel. Then the statistical characteristic parameters of the single sand body configuration unit have analyzed.  Result:Three main vertical contact styles between single sandbody architectural units are summarized as isolated type, overlap-type, overlay cutting type; and three main lateral contact styles as separated type, butt*joint type, side shear type.Moreover,the control effect of single sandbody on remaining oil is analyzed, showing that the internal rhythm of the fourth grade architectural unit and contact styles between architectural units have an important influence on the oil—water movement, which are the two important factors for enrichment of remaining oil.