摘要
鄂尔多斯盆地旬邑地区上三叠统延长组长6油层组是典型的低孔低渗储层,岩性主要是长石岩屑砂岩和岩屑长石砂岩,孔隙类型主要是残余粒间孔及长石溶蚀孔隙,孔喉组合主要是细孔细喉型与细孔微细喉型,储层非均质性强。储层物性主要受岩石成分、沉积相带、孔隙结构及成岩作用共同影响。长6油层组储层分为Ⅰ类、Ⅱ类、Ⅲ类、Ⅳ类,综合评价其储层主要属于Ⅰ、Ⅱ类储层。
Chang-6 oil layer of Triassic Yanchang formation in Xunyi area of Ordos basin is a typical low porosity and low permeability reservoir and the lithology is mainly feldspathic lithic sandstone and lithic feldspathic sandstone.The pore type is mainly residual intergranular and feldspar dissolution porosity.The pore throat portfolios are mainly fine pores and pore throat fine throat,reservoir heterogeneity is strong.Reservoir properties are mainly affected by the combined effect of rock composition,sedimentary facies,pore structure and diagenesis.Chang6 oil reservoir can be divided into classⅠ,Ⅱ,Ⅲ,Ⅳtype.Through a comprehensive evaluation,the reservoir mainly belongs toⅠandⅡtypes.
出处
《石油地质与工程》
CAS
2014年第5期40-43,155,共4页
Petroleum Geology and Engineering
关键词
鄂尔多斯盆地
旬邑地区
储层特征
孔隙结构
分类评价
Ordos basin
Xunyi area
reservoir characteristics
pore structure
classification evaluation
