摘要
周长区长7层是典型致密油层,分析清楚该层的储层特征,有利于储层评价和该区域致密油的勘探开发部署。通过利用薄片鉴定、岩心铸体薄片、岩心观察、扫描电镜和压汞实验等方法研究了长7储层岩石学特征,孔隙特征、孔隙结构、物性特征储层类型,并分析了对储层特征有主要影响的主控因素。结果表明,研究区长7层的岩石类型主要为细粒长石砂岩,胶结类型以孔隙式为主,孔隙结构为小孔细喉型,孔隙度范围为2.1%~15.0%,平均值为7.2%,渗透率分布范围为0.04~1.36 mD,平均值为0.31 mD,周长区长7储层属于特低孔特低渗储层。沉积相和成岩作用是储层发育的影响因素。
Chang 7 reservoir in Zhouchang area is a typical tight oil reservoir.It is benef icial to reservoir evaluation and regional exploration and development of tight oil to analyze its reservoir characteristics.By means of thin section identif ication,core casting thin section,core observation,scanning electron microscope and mercury injection experiment,the petrological characteristics,pore characteristics,pore structure and physical property characteristics of Chang 7 reservoir are studied,and the main control factors affecting the reservoir characteristics are analyzed.The results show that the main rock type of Chang 7 formation in the study area is f ine-grained feldspar sandstone,the cementation type is mainly pore type,the pore structure is small pore and f ine throat type,the porosity range is 2.1%~15.0%,the average value is 7.2%,and the permeability distribution range is 0.04~1.36 mD,with an average of 0.31mD.Chang 7 reservoir belongs to ultra-low porosity and ultra-low permeability reservoir.Sedimentary facies and diagenesis are the controlling factors of reservoir development.
作者
高攀明
李烨炜
GAO Pan-ming;LI Ye-wei(Wuqi Oil Production Plant of Yanchang Oilf ield Co.,Ltd.,Yan’an 716000,China)
出处
《化工管理》
2021年第13期94-95,共2页
Chemical Engineering Management
关键词
周长地区
长7油层
储层特征
主控因素
鄂尔多斯盆地
Zhouchang area
Chang 7 reservoir
reservoir characteristics
main controlling factor
Ordos basin
