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研究区域为鄂尔多斯盆地伊陕斜坡西南部的志丹区域,目的层位为马家沟组马五段上部和峰峰组。主要应用岩石薄片鉴定数据,测井曲线数据,物性分析数据和压汞数据对研究区的储层物性特征、结构特征以及储集空间类型进行了研究。结果表明,本区目的层位储层中原生孔隙较少,主要为次生溶洞。根据储层孔隙度及渗透率测试结果,计算了储层流动带指标FZI,并据此将储层划分为四类流动单元。根据储层的储集与渗流空间特征,碳酸盐岩储层被划成四种类型:孔隙型、溶孔型、裂隙型以及复合型,其中溶孔型储层是该研究区内储集性能较好的储层。
The study area is the Zhidan area in the southwestern part of the Yi-Shan slope in the Ordos Basin, with the uppermost strata of the Ma-5 Member and the Feng-Feng Formation in the Majiagou Formation. The petrophysical properties, structural characteristics and reservoir space types of the reservoir are mainly studied by using the identification data of rock slices, well logging data, physical analysis data and mercury intrusion data. The results show that there are few primary pores in the reservoirs in this area, mainly secondary caves. According to the reservoir porosity and permeability test results, the reservoir flow zone index FZI is calculated, and the reservoir is divided into four types of flow units. According to the spatial characteristics of reservoir reservoirs and seepage, carbonate reservoirs are classified into four types: pore type, dissolved pore type, fractured type and compound type. The dissolved pore type reservoirs are the reservoirs in the study area Better performance reservoir.