鄂尔多斯盆地东北部直罗组砂岩成岩作用特征分析  

作　　者：孟恩慧 

机构地区：[1]长安大学地球科学与资源学院,西安710061

出　　处：《科技创新与应用》2025年第7期97-100,共4页Technology Innovation and Application

摘　　要：通过对鄂尔多斯盆地东北部进行野外剖面观察和样品采集,运用普通薄片、铸体薄片、物性分析和扫描电镜等分析方法进行测试,对直罗组砂岩的成岩作用特征进行研究,明确砂岩的岩相学特征、孔隙特征、物性特征及成岩作用特征,探讨鄂尔多斯盆地直罗组砂岩基本特征。结果表明,研究区直罗组储集层岩性以长石质岩屑砂岩和岩屑砂岩为主。砂岩孔隙类型以粒间孔隙、粒间溶孔和粒内溶孔为主,物性特征以特低孔—特低渗为主,成岩作用主要表现为压实、胶结和溶蚀作用。Through field section observation and sample collection in the northeastern part of the Ordos Basin,and testing using ordinary thin slices,cast thin slices,physical property analysis and scanning electron microscopy,the diagenesis characteristics of the Zhiluo Formation sandstone are studied to clarify the petrographic characteristics,pore characteristics,physical properties and diagenesis characteristics of the sandstone,and discuss the basic characteristics of the Zhiluo Formation sandstone in the Ordos Basin.The results show that the reservoir lithology of Zhiluo Formation in the study area is dominated by lithic sandstone and lithic sandstone.The pore types of sandstone are mainly intergranular pores,intergranular dissolved pores and intragranular dissolved pores,and the physical characteristics are mainly ultra-low porosity and ultra-low permeability.The diagenesis is mainly manifested by compaction,cementation and dissolution.

关 键 词：鄂尔多斯盆地 直罗组 成岩作用 岩石学 溶孔 

分 类 号：P618.130.2[天文地球—矿床学]