Abstract: At present there are no mature research thinking and methods for hierarchical architecture analysis on distributary channel sand bodies of shallow-water delta facies in China and abroad. Taking the close spacing area in the middle of Xingshugang oilfield as a case, combining the data of seismic, logging, core, XRF and physical property analysis and test, the paper quantitatively characterizes the distributary channels of shallow-water delta facies hierarchically. The results show that 8 architectural levels are classified for the sand body of shallow-water delta facies in the study area. The single-period distributary channels in the 5th architectural elements are various and of different sizes, and stable interlayers are mostly developed between the distributary channels formed in different periods, which controls the general effect of waterflood development. The distribution characteristics of the different types of the 4th architectural elements are significantly different and the remaining oil saturation are various greatly in single wells and in the plane. The 3rd architectural elements are developed in different periods with the interface mostly being the stable physical interlayers, which controls the efficiency of ASP flooding and vertical distribution of remaining oil. The hierarchical analysis on the reservoir architecture can provide basis for fine characterization of shallow-water delta distributary channel sand body in the study area and potential tapping of remaining oil at extra-high water cut stages in mature oilfields