摘要:鄂尔多斯盆地苏里格气田中二叠统下石盒子组第8段的致密砂岩还存在着一些地质认知障碍,缺乏必要的实验和理论支撑。该文利用薄片鉴定、压汞法、扫描电镜、X衍射等实验对盒8段致密砂岩进行系统研究,研究表明盒8段主要发育石英砂岩和岩屑石英砂岩,岩屑砂岩、岩屑长石砂岩、长石石英砂岩等类型岩性不发育。储层物性较差,为特低孔低渗储层,岩石孔喉分布范围较大,储集空间中的小孔隙、细喉道发育。
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