鄂尔多斯盆地镇北地区长8段砂岩碳酸盐胶结物特征及其对储层的影响  

Carbonate Cement and the Influence On Chang 8 Reservoir of Zhenbei area,Ordos Basin

作　　者：孙国智[1] 李鲜蓉[1] 刘超[1] 

机构地区：[1]西北大学大陆动力学重点实验室西北大学地质系,陕西西安710069

出　　处：《内蒙古石油化工》2008年第18期85-86,共2页Inner Mongolia Petrochemical Industry

摘　　要：根据砂岩薄片、铸体薄片、扫描电镜,测井资料及常规物性资料的分析,对鄂尔多斯盆地镇北油区长8段储层的碳酸盐胶结物成岩作用特征及其对储层的影响进行了分析,认为该区碳酸盐胶结物分为三类,发育早晚两期。其中晚期亮晶方解石的溶蚀作用极大的改善了储层的孔隙结构,早期泥晶方解石和缺乏碳酸盐胶结物的砂岩储层物性极差。中成岩阶段A期长3,长8_1段泥岩的热降解作用生成的有机酸和CO_2是促成碳酸盐发生溶蚀作用的主要原因。This paper analyses the carbonate cement and the Influence on Chang 8 reservoir in the north of Zhenyuan by using the methods of analysis of mercury injection,cast section,popular section,scanning electron microscope,well informa- tion.It is considered there are three kinds of carbonate cements and which can be devided into two stages.The dissolution of the late sparry calcite improved the porosity greatly.The reservoir cemented by the early sparry calcite or lack of carbonate cement had a range physical pr...

关 键 词：鄂尔多斯盆地 镇北地区 延长组 碳酸盐胶结物 

分 类 号：P618.13[天文地球—矿床学]