准噶尔盆地中部低渗透砂岩储层成因  

GENESIS OF LOW PERMEABLE RESERVOIR IN CENTRAL JUNGGAR BASIN

作　　者：胡海燕[1] 陈元勇[2] 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]中国石油集团公司塔里木油田分公司,新疆库尔勒841000

出　　处：《大庆石油地质与开发》2009年第6期43-46,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：基金项目：国家自然科学基金项目（40238059）和长江大学博士发展基金项目（801130010104）资助.

摘　　要：通过露头观察、镜下薄片鉴定、扫描电镜、x衍射等分析测试手段，研究了准噶尔盆地中部侏罗系特低孔、特低渗砂岩储层的主控因素与形成机理。结果表明，储层砂岩岩屑含量高，成熟度低，煤系储层。粒径偏细导致砂岩储层对压实作用敏感，压实作用是导致储层孔隙度降低的主要因素；胶结作用是导致砂岩物性降低的次要成岩作用；流体溶蚀作用产生的离子不能有效迁移，高岭石等粘土矿物原地沉淀，堵塞孔隙。这些因素的耦合作用是低渗透储层发育的诱因。Through analysis and measurement methods including outcrop observation, microscopic thin slice identi- fication, SEM and x-diffraction, main control factors and forming mechanism in central Junggar Basin of Jurassic period are studied. Results show that, this reservoirs are coal measure with high content of lithic fragment and lowmaturity. Small grain diameter causes sensitivity of sandstone reservoir for compaction. Compaction is a main factor which causes reservoir porosity decrease. Cementation is secondary diagenesis causing sandstone property de- crease. Ion generated from fluid dissolution cannot effectively migrate. Clay mineral such as kaolinite precipates in place and plugs pores. Coupling effects of these factors are main causes for low-permeable reservoir development.

关 键 词：准噶尔 低渗透储层 压实作用 溶蚀作用 

分 类 号：TE121[石油与天然气工程—油气勘探]