通过大量的分析化验资料，研究了吉木萨尔凹陷二叠系梧桐沟组砂岩储层的物性特征和孔隙结构特征，认为研究区储层属于低孔、中渗、粗喉道储层。根据行业标准划分出三大类六小类储层，有勘探潜力的砂层主要为三类储层，储层物性的控制因素主要为压实作用，还有砂岩粒径和溶蚀作用。指出埋深3000 m为一界限值，其上压实作用弱，储层物性较好。预测从吉7井到吉17井的斜坡带为本区优质储层发育区，勘探潜力极大。

By analyzing a great quantity of laboratory data, this paper studies the physical properties and pore structure of the sandstone reservoirs in the Permian Wutonggou formation. The reservoirs are of low porosity, moderate permeability and coarse throat. The reservoirs can be classified into 3 categories and 6 subdivisions according to the industrial standard. The sand beds of potential exploration are Types ⅠandⅡ of the 3rd category reservoirs. The control factors of physical property are mechanical compaction, sandstone grain diameter, and denudation. It is pointed out that 3000m of burial depth is a threshold, above which the reservoir physical properties are relatively preferable because of weak compaction.It is predicted that the high quality reservoir is mainly distributed in the slope zone from Ji No.7 well to Ji No.17 well.