当砂岩为单层砂体或多层砂体以不同的方式叠置时，其储层物性及含气性有较大差别。基于砂岩储层精细评价的需要，文章对鄂尔多斯盆地山2 段、盒8 段进行砂体组合类型的划分与评价。以测井资料及岩心描述为基础，将砂体组合划分为两大类、16 种不同的类型。建立了砂体组合的测井、地震响应模式，并对各种砂体组合类型的物性及含气性进行了评价。研究表明，厚度较大的单砂体物性及含气性一般优于复合砂体，分流河道、水下分流河道、河口坝单砂体及其复合砂体的物性及含气性较好。苏里格地区盒8下段发育辫状河—辫状河三角洲沉积体系，心滩砂体物性中等—较差，向下到三角洲平原、前缘相带物性变好，且以三角洲平原分流河道单砂体、分流河道叠置砂体物性最好。榆林地区山2 段以水下分流河道、河口坝单砂体及其复合砂体物性最好，分流河道单砂体及其叠置砂体物性较好。横穿沉积体系，由河道中心至河道侧翼物性变差。

Reservoir properties and gas-bearing properties vary significantly while sandstone is single-layer sand body or multilayer sand bodies assembled in different ways. Based on the fine evaluation of sandstone reservoir, sand body assemblages of Shan 2 and He 8 member in Ordos Basin are classified and evaluated. By analyzing well logging and core description, sand bodies can be divided into two categories and 16 different types of sand body assemblages. For different sand body assemblages, well logging and seismic response models are set up, and the reservoir characteristics and gas-bearing properties are evaluated. The results showthat thicker single sand body has better gas-bearing property than composite sand bodies, and that single sand body or composite sand bodies of distributary channel, underwater distributary channel and mouth bar have high porosity and gas-bearing property. Sedimentary system of braided river and braided delta is identified in He 8 member in Sulige area. The physical property of channel bar sand body is moderate-poor, and gets better downward to the delta plain and delta front. The single sand body of distributary channel in delta plain and superimposed sand bodies of distributary channel have the best properties. In Shan 2 member of Yulin area, single sand body and composite sand bodies of underwater distributary channel and mouth bar have the best physical properties. Single sand body of distributary channel and overlapping sand body have better properties. Through the sedimentary system, physical property becomes poor fromchannel center to channel flank.