[Objectives] The exploration and development of the Ordos Basin have progressed rapidly. With the deepening exploration of effective reservoir identification technology and the continuous advancement of quantitative characterization research, the southeastern part of the basin has demonstrated enormous exploration potential. Strengthening the understanding of sedimentary evolution in this region, clarifying the sedimentary sand body patterns in the southeastern part of the Ordos Basin, and analyzing their spatial combinations are of significant importance for the exploration and development of tight gas in the basin. [Methods] Sedimentary characteristics in the study area were analyzed using methods such as petrographic observation, grain size analysis, and geochemical analysis. By identifying the configuration elements of the study area and combining well log data, a regression analysis was conducted to establish a discriminant formula for the configuration elements, enabling the qualitative and quantitative identification of configuration elements and constructing the three-dimensional distribution characteristics of configuration elements in the study area. [Results] In the study area, 9 major lithological types and 10 configuration elements were identified in the Shan 2 Member to He 8 Member. Fisher's discriminant formula for five configuration elements—submarine distributary channels, submarine distributary bay, mouth bars, sheet sand, and peat marshes—was established. Six stacking modes were identified: submarine distributary channel – submarine distributary channel, sheet sand – sheet sand, submarine distributary channel – sheet sand, distributary channel – distributary channel, mouth bar – mouth bar, submarine distributary channel – mouth bar. [Conclusions] In the study area, the Shan 2 and Shan 1 Member developed meandering river delta front subfacies, and He 8 Member developed braided river delta front subfacies and delta plain subfacies. Based on the discriminant formula for configuration elements, sand body configuration distribution models in the Shan 2 Member, Shan 1 Member, and He 8 Member were established. The sand body configuration in the Shan 2 Member is mainly developed in submarine distributary channels, while the Shan 1 Member is dominated by submarine distributary channels and sheet sand, with frequent overlap between them. The He 8 Member is dominated by submarine distributary channels, mouth bars, and sheet sand, with a rich variety of sand body stacking patterns.