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针对鄂尔多斯盆地榆林区山2段储集层低孔、低渗的特点,利用研究区内储集层岩石的岩性、物性资料并结合该区储集层沉积演化史,对鄂尔多斯盆地榆林区山2段储集层的储层结构和空间展布进行了研究,分析了榆林气田山2段储集层的岩石学特征、成岩特征、孔隙类型结构及物性特征、发育主控因素。并在此基础上对储层进行了分类评价。结果表明:榆林气田山2段储层岩石以石英砂岩为主,孔隙类型以发育粒间孔为主,储层物性受成岩作用和沉积微相的双重控制。储层的含气性与石英砂岩储层的分布有密切的关系。
In view of the characteristics of low porosity and low permeability of reservoirs in the 2nd member of Yulin, Ordos Basin, using the lithology and physical property data of reservoir rocks in the study area and combining with the sedimentary evolution history of reservoirs in Yulin area, The reservoir structure and spatial distribution of reservoir 2 are studied. The petrological characteristics, diagenetic characteristics, pore type structure and physical property of reservoir and the controlling factors of development are analyzed. On this basis, the reservoir is classified and evaluated. The results show that the reservoirs in the second member of Yushan gas field are dominated by quartz sandstone, and the pore type is dominated by intergranular pores. The reservoir properties are controlled by diagenesis and sedimentary microfacies. The gas content of reservoirs is closely related to the distribution of quartz sandstone reservoirs.