中文摘要：

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。

英文摘要：

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.