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前人对泥质岩进行了大量的研究,主要集中在泥质岩的岩石成分、成岩作用、孔隙结构、封闭机理及盖层的类型及分布等几个方面。泥质岩所含矿物主要是粘土矿物,陆源碎屑矿物。泥质岩中的成岩作用主要是压实作用、粘土矿物转化作用等。泥质岩孔隙结构主要包括孔隙大小、孔隙类型、连通性等方面。封闭机理主要分为物性封闭机理、超压封闭机理和烃浓度封闭机理三种。盖层分为区域盖层、局部盖层和隔层。对前人研究成果进行了综合分析,并指出存在的问题:对被裂缝、断层改造的泥质岩盖层研究比较薄弱。
A great deal of research has been done on the mudstone, which mainly focused on the rock composition, diagenesis, pore structure, sealing mechanism and the type and distribution of the cap rock. The minerals contained in the muddy rocks are mainly clay minerals and terrigenous detrital minerals. Diagenesis in shale mainly compaction, clay mineral transformation and so on. Porphyry pore structure mainly includes pore size, pore type, connectivity and so on. Closure mechanism is mainly divided into physical closed mechanism, overpressure sealing mechanism and closed concentration of three kinds of hydrocarbon concentration mechanism. Cover is divided into regional cap layer, partial cap layer and interlayer. A comprehensive analysis of the research results of predecessors is made and the existing problems are pointed out. The study on the shale caprock fractured by faults and faults is relatively weak.