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沙河街组是济阳坳陷沾化凹陷罗家地区的主要储集层，近年在沙四段至沙一段获重大油气发现。以岩石学研究为基础，并利用Ｉ／Ｓ混层比、镜质体反射率及储集层物性等资料，对该地区沙河街组储集层成岩作用类型、特征进行详细研究。认为该地区沙河街组储集层成岩作用类型较多，压实、胶结作用是破坏孔隙的主要成岩作用，溶解作用是形成孔隙的主要成岩作用；属中成岩阶段，以２１００ｍ为界又划分出中成岩早期、晚期；发育压实、杂基支撑、碳酸盐胶结交代及碳酸盐溶解这４种成岩相类型。储集空间以溶解作用形成的次生孔隙为主，溶解作用分为大气淡水淋溶和埋藏溶解，后者与有机质成熟及粘土矿物转化有关。沙四上段砾岩体储集性相对较差，为低孔低渗—低孔中渗储集层，沙三段、沙二段砂岩和沙二段、沙一段碳酸盐岩储集性相对较好，为中孔中渗—高孔高渗储集层。图１表２参２（邹冬平摘）
Shahejie Formation is the main reservoir in Luojia area of Zhanhua Depression in Jiyang Depression. In recent years, significant oil and gas discoveries have been found in Sha 4 to Sha 1. Based on the petrological study, the types and features of diagenesis of the Shahejie formation reservoir in this area are studied in detail based on I / S mixing ratio, vitrinite reflectance and reservoir physical properties. It is considered that there are many types of diagenesis in Shahejie Formation reservoir in this area. Compaction and cementation are the main diagenesis to destroy pores, and dissolution is the main diagenesis for forming pores. In the middle diagenetic stage, Early diagenesis and late diagenesis; four types of diagenetic facies, such as compaction, hetero support, carbonate cementation, and carbonate dissolution. The reservoir space is dominated by secondary pores formed by dissolution. Dissolution can be divided into the leaching of atmospheric freshwater and the dissolution of burial. The latter is related to the maturation of organic matter and the conversion of clay minerals. The conglomerate bodies in the upper part of Es4 have relatively poor reservoir properties, which are low-porosity and low-permeability-low porosity and medium permeability reservoirs, sandstone Es3, sand2 and sand2, and carbonate reservoirs in the first member of sand4 Well, for the permeability in the hole - high porosity and permeability reservoir. Figure 1 Table 2 Reference 2 (Zou Dongping pick)