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致密砂岩碎屑类型主要为长石岩屑质石英砂岩，次为长石质岩屑砂岩，且以细粒为主。Φ＜５％的样品占６３％，Ｋ＜０．１×１０￣（－３）μｍ￣２的占７８％，Ｒ＿Ｍ＝０．００７～０．４７２μｍ，瞩细－微喉道致密砂岩。部分孔隙结构参数间相关很好，但它们与常规物性参数间均不相关或不甚相关．借助Ｒ型和Ｑ型因子分析选择评定孔隙结构质量的参数，并以Ｒ＿Ｍ＞０．１５μｍ，Ｃ＜０．４５作为确定（差）储集岩的标准。（差）储集岩以中粒和部分细粒的石英加大粒间孔－长石溶孔砂岩为主，普遍具较高级别的油显示，主要分布于镇江煤矿和宜兴川埠地区，应作为重点勘查对象。
Tight sandstone clastic types are mainly feldspathic quartzite sandstone, and secondarily feldspathic lithic sandstone, with fine-grained mainly. The samples with Φ <5% account for 63%, and the samples with K <0.1 × 10 ~ (-3) μm ~ 2 account for 78% with R_M = 0.007 ~ 0.472μm. Part of the correlation between pore structure parameters is good, but they are not related or unrelated to the general physical parameters. The parameters for assessing the quality of the pore structure were selected by means of R-type and Q-type factor analysis, and R_M> 0.15 μm and C <0.45 were used as the criteria for determining (poor) reservoir rocks. (Poor) reservoir rocks are mainly medium-grain and fine-grained quartz with intergranular feldspar-feldspar dissolved-pore sandstone. Generally, higher-grade oil shows that they are mainly distributed in Zhenjiang coal mine and Yixing Chuanbu area and should be used as Key exploration targets.