作　　者： (伊硕）; (黄文辉）; (金振奎）; (高白水）; (朱小二）;

机构地区： 中国地质大学北京能源学院,北京100083 中国地质大学北京海相储层演化与油气富集机理教育部重点实验室,北京100083

出　　处： 《现代地质》 2017年第4期791-801,共11页

摘　　要： 石炭系KT-Ⅱ碳酸盐岩层是扎纳若尔油田的主要勘探开发层之一,研究成岩作用对储层孔隙演化的影响具有重要意义。在薄片观察及碳氧同位素、阴极发光、流体包裹体等地化分析的基础之上,阐明了研究区KT-Ⅱ碳酸盐岩层的主要成岩作用类型、成岩序列及其对孔隙演化的影响,并得出如下结论:(1)对储集物性有明显影响的成岩作用主要包括压实-压溶作用、胶结作用、溶蚀作用及破裂作用等;(2)划分出滩相亮晶颗粒灰岩和潮坪相灰泥石灰岩两类成岩演化模式及孔隙演化模式,前者可细分为亮晶有孔虫石灰岩和亮晶砂屑鲕粒石灰岩成岩及孔隙演化模式两种亚类;(3)成岩作用是储层储集物性的主控因素之一,岩石类型(受沉积微环境的控制)的差异决定着不同早期成岩响应,进而影响后期成岩改造,并控制着差异性储层的形成。因此,在沉积基础之上的成岩改造对储层储集性能差异性分布具有同样重要的控制作用。 The carbonates of KTⅡ layer in Carboniferous are the main layer of exploration and development of Zanazor Oilfield. The research of diagenesis is of great significance to influence the pore evolution of reservoir. Based on the observation of thin sections, and geochemical analysis on carbon oxygen isotope, cathodoluminescence, and fluid inclusion, we expound the main diagenesis types, the diagenetic sequence and its influence on pore evolution of KTⅡ layer in the study area, and draw the following conclusions： （1） The diageneses which have obvious effects on reservoir quality include compaction, pressolution, cementation, dissolution and cataclasis, etc.; （2） There are two kinds of diagenetic evolution pattern and pore evolution model： the sparry grain limestone in shoal and mud limestone in tidal flat. Furthermore, the former can be subdivided into sparry foraminiferafusulinida limestone and sparry arene-oolitic limestone; （3） The diagenesis is one of the main controlling factors of reservoir quality. The difference of rock types （controlled by sedimentary micro environment） determines the differentia in early diagenetic response, which affects the late diagenetic reconstruction, and controls the formation of differential reservoir. Therefore, in terms of the control on the differential distribution of reservoir performance, the diagenetic alteration which is on the basis of sedimentary and depositional conditions are of equal importance.

关 键 词： 扎纳若尔 石炭系 成岩作用 成岩序列 孔隙演化