鄂尔多斯盆地葫芦河地区三叠系延长组低渗致密砂岩储层特征研究  

Low Permeable Compacted Sandstone Reservoir of the Chang4+5Memberof the Yanchang Formation (Triassic),Huluhe Area,Ordos Basin

作　　者：王振奇[1,2] 何贞铭[1,2] 徐龙 赵明跃[1,2] 任玉秀[1,2] 

机构地区：[1]江汉石油学院石油地质系 [2]河南石油勘探局勘探开发研究院

出　　处：《江汉石油学院学报》1998年第2期27-32,37,共7页Journal of Jianghan Petroleum Institute

摘　　要：在薄片、Ｘ衍射、扫描电镜、压汞、阴极发光等研究基础上，对鄂尔多斯盆地葫芦河地区三叠系延长组长４＋５段低渗致密砂岩储层特征进行了研究。认为原始矿物组成和结构、早成岩期的机械压实作用和化学压溶作用、晚成岩期的铁方解石胶结作用等是形成低渗致密砂岩储层的主要因素。根据１８个压汞分析样品１１个孔隙结构变量的聚类分析结果，对研究区长４＋５段储层进行了分类评价。指出该区砂岩储层大多应归入低孔特低渗的Ⅲ类和不能作为有效储层的Ⅳ类。Sandstones in the Chang4+5 member of the Yanchang formation(Triassic) are studied in petrology,diagenesis and petrophysics with thin section,Xray diffraction,SEM,mercury injection and cathodoluminescence techniquesThe components and structures of the original minerals,mechanical and chemical compaction at the early diagenesis phase and ferroan calcite cementation at the late diagenesis phase are main factors making them compacted and very low permeable Based on the cluster analysis of 18 mercury injection samples from the Chang4+5 reservoir, the sandstone resrvoirs in the studied area are classified into type Ⅲ with low porosity and very low permeability, and type Ⅳ without reservoir ability according to the reservoir evaluation standards

关 键 词：低渗透储集层 砂岩储层 成岩作用 三叠纪 盆地 

分 类 号：P618.130.2[天文地球—矿床学]