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对鄂尔多斯盆地YZ区储层的岩性、物性、孔隙结构特征及其影响因素进行研究,为油田开发提供地质依据。通过铸体薄片、压汞分析、物性分析等资料统计分析,对储层基本的宏观、微观特征进行研究。研究区长6砂岩属低孔-低渗和低孔-特低渗储层,孔隙结构以小孔微喉型为主。储层性质主要受成岩作用和沉积环境的控制,埋深在一定程度上也影响着储层物性;微裂隙在改善储层物性的同时也加大了储层的非均质性。
The lithology, physical property, pore structure and influencing factors of YZ reservoir in Ordos Basin are studied to provide geological basis for oilfield development. By means of statistic analysis of cast film, mercury intrusion analysis and physical property analysis, the basic macroscopic and microscopic characteristics of reservoir are studied. The study area of the 6 sandstone is a low-porosity - low permeability and low porosity - low permeability reservoir, the pore structure of microporous micro-throat-based. Reservoir properties are mainly controlled by diagenesis and sedimentary environment. Depth of burial also affects reservoir physical properties to a certain extent. Micro-fractures improve reservoir physical properties and also increase reservoir heterogeneity.