准噶尔盆地西北缘二叠系碎屑岩储层成岩相与成岩演化研究

西北缘克百地区二叠系砂砾岩储层是准噶尔盆地最重要的油藏储集岩之一。运用偏光显微镜在对碎屑岩储层的成岩作用、自生矿物及孔隙特征详细观察的基础上，结合扫描电镜、孔渗测试及测井、录井资料的分析，对该区二叠系砂砾岩储层的岩石类型和成岩作用进行了研究，指出压实作用、胶结作用、溶蚀作用是影响该类储层物性的主要成岩作用。在此基础上，结合成岩作用和成岩阶段的研究，划分出了7个成岩相:1）高成熟强溶蚀相，2）高成熟强胶结相，3）高成熟中胶结中溶蚀相，4）高成熟弱压实相，5）高成熟强压实相，6）低成熟弱压实相，7）低成熟强压实相，并对各个成岩相的形成条件、成岩特征、成岩环境、成岩演化序列和成岩模式进行了归纳和总结，对不同成岩相的砂砾岩储集性能进行了分析，阐述了优良储层发育的主要成岩相带及沉积相带。

Characteristics of Diagenesis and Diagenetic Facies of Permian Clastic Reservoir in Northwest Margin of Junggar Basin

The Permian sandy conglomerates in Kebai area is one of the most important petroleum reservoir rocks  in Junggar Basin. According to the result of the polarized microscope analysis of the diagenesis, authigenic mineral assemblage, pore characteristics of the clastic reservoir, and the study of scanning electron microscope(SEM), test of porosity and permeability, mud logging and well logging data, the type of rock and the diagenesis of Permian sandy conglomerates in  the study area is studied. It suggests that the factors of influencing reservoir property in the study area are compaction, cementation  and dissolution. In terms of the research on stage and characteristics of diagenesis, the Permian sandy conglomerate reservoirs in the study area are divided into seven diagenetic facies: 1) high mature strong dissolution facies, 2) high mature strong cementation facies, 3) high mature middle cementation middle dissolution facies, 4) high mature weak compression facies, 5) high mature strong compression facies, 6) low mature weak compression facies,7) low mature strong compression facies. Then, the conditions of diagenesis facies, the feature of diagenesis, the environment of diagenesis, model of diagenesis and evolutionary sequence of diagenesis are concluded and summarized. Furthermore, the reservoir properties of sandy conglomerate of different diagenesis facies is summarized. The main lithofacies belt and sedimentary facies zone of high quality reservoir development zones is  predicted and described .