In this paper, based on geological analysis,combination of methods in GeoEast such as structure guided filter based on dip scan,time strata slice,3D visualization,SpecDecomp,seismic attribute optimization of dimension reduction, hydrocarbon prediction,etc,is used for Doshan area in the South Turgay basin identification,description, and estimation of meandering river sand,which has achieved obvious results in precise description of river channel shape, rich sand area, thickness variation,oil-bearing property, etc.