本文以碳酸盐沉积学和成岩作用理论和研究方法为基础，采用多技术、多手段的综合方法，配以先进的分析手段，重点分析了川东北PG地区飞仙关组的成岩特征、孔隙演化过程以及孔隙类型等内容。详细的阐述了PG飞仙关组成岩过程中主要的成岩类型，建立埋藏溶蚀模式和白云石化模式，分析了起建设性成岩作用和破坏性的成岩作用，同时也划分了PG飞仙关组成岩环境和成岩阶段，详细阐述了不同成岩阶段孔隙演化状况。 飞仙关组储层主要成岩事件有压实压溶作用、多期方解石胶结作用、多种矿物充填作用、多期溶蚀作用、重结晶、白云石化作用及破裂作用成岩现象等。对孔隙生成有重要贡献的有白云石化、溶蚀和裂隙作用，同生作用广泛的白云化作用形成了大量的晶间孔、晶间溶孔。引起孔隙被破坏的主要作用是胶结与充填、压实和重结晶等。 PG地区飞仙关组经历了两种不同的成岩演化序列，地层己处于晚成岩阶段。并将该区成岩作用划分为三个成岩阶段，即准同生－早期成岩阶段、浅埋－中埋成岩阶段（早期成岩阶段）、深埋成岩阶段（晚成岩阶段）。 PG飞仙关组碳酸盐岩储层不仅受沉积作用影响，同时也是成岩作用影响的结果。储层以二类为主。

Base on the principle and the methods of cabernate sedimentology and reservoir diagenesis,and guided by theories of carbonate geology ,the diagenesis ,pore evolution and pore type of Feixianguan Formate in northest puguang have been comprehensively tudied.Multiple methods from different branchesof geology and advanced analyze and test technology have been used in this reseach .The type and characte rustics of diagenesis are described in detail,burial solution model and dolomitic model established,diagentic environment and diagenetic stage divided.At the same time ,it has been divided the behavior and destroyed reservoir diagenesis.What,more,the pore evolution are studied in different diagenetic stage. The feixianguang in Puguang reservoir experienced complicated diagenesis such as compaction、pressolution、cementation of calcite、multipphase dissolution、dolomitization and cataclasis.The diagenesis can be into two type of constribute and destructive according to contribute to porosity formation and evolution.The constructive diagenesis which is an important reason for feixianguan formation. The feixianguang in Puguang reservoir experienced two different diagenesis order,and the Formation is late stage at now. The Feixianguan Formation in northeastern Sichuan Basin has experienced 3 evolutionary stages, namely penecon-temporaneous-early diagenetic stage, shallow-moderate burial diagenetic stage, and deep burial diagenetic stage. Study suggests that Feixiang formation in Puguang is essentially by sedimentation and diagenesis.TheⅡis more.