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在大量岩石薄片和铸体薄片研究的基础上，运用常规物性、毛细管压力曲线和图象分析等手段，对吐拉盆地侏罗系砂岩的孔渗性及孔隙结构等特征作了详细研究。孔隙类型主要为次生溶孔，偶见剩余原生粒间孔，它们基本上属于低孔低渗储集层，同时孔隙的微观结构较差。强烈的机械压实作用是导致砂岩孔隙结构变差的主要因素；早期碳酸盐胶结作用弱，使得后期的溶解改造作用也较弱；这造成了砂岩的有效储集空间较差的结果。构造作用使得岩石中裂隙发育，提高了岩石孔渗性，极大地改善了岩石的储集性能，在有利部位可以形成较好的储层。
On the basis of a large number of rock flakes and cast slabs, the characteristics of pore permeability and pore structure of the Jurassic sandstone in the Tula Basin are studied in detail by means of conventional physical properties, capillary pressure curves and image analysis. The pore types are mainly secondary dissolved pores, occasionally remaining primary intergranular pores, which basically belong to low porosity and low permeability reservoirs, meanwhile the microstructure of pores is poor. The strong mechanical compaction is the main factor leading to the deterioration of the pore structure of sandstone. The weak early cementation of carbonate resulted in the weak dissolution and reformation in the later stage, which resulted in the poor storage space of sandstone. The tectonism makes the fissures in the rock develop, improves the porosity and permeability of the rock, greatly improves the reservoir performance of the rock, and can form better reservoirs in favorable places.