塔里木盆地西部碳酸盐岩成岩环境特征及其对储层物性的控制作用

塔里木盆地西部碳酸盐岩在其漫长的地质演化过程中 ,主要经历了大气淡水成岩环境、海水成岩环境和埋藏成岩环境的改造 ,形成了丰富的成岩组构和成岩作用类型。根据宏观和微观岩石学特征的研究 ,并结合地球化学 ,阴极发光和微量元素分析资料 ,可在研究区鉴别出十三种基本的成岩段类型和八种有利的复合成岩段 ,并详细描述了不同成岩段的成岩组构、成岩矿物组合特征和储集空间类型 ,同时深入探讨了不同成岩段与储层物性间的关系及其受控因素 ,从而将碳酸盐岩成岩演化特征与储层物性特征有机地联系起来 ,为客观评价和预测储集层在纵向和平面上的展布规律确立了理论基础

Characteristics of Diagenetic Environments of Carbonate Rocks in Western Tarim Basin and Their Controls on the Reservoir Property

Carbonate rocks distributed in western Tarim basin have undergone the reworking caused by meteoric fresh water diagenetic environment, marine diagenetic environment and burial diagenetic environment repeatedly during their long evolutionary geohistory, and formed abundant diagenetic fabrics and diagenesis types. Based on the field observation and petrographic features, together with the geochemistry, cathodoluminescence and trace elements data, it can be seen that there are 13 kinds of basic diagenetic intervals and 8 favorable composite intervals in the study area. Characteristics of different diagenetic environments and diagenetic intervals are described in detail. Furthermore, the relationship between reservoir property and diagenetic intervals as well as their controls are also discussed, which has connected the diagenetic features of carbonate rock with reservoir property, and laid a theoretical basis for assessing and predicting the vertical and plane distribution of favorable carbonate rock reservoir.