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根据铸体薄片、扫描电镜、物性、孔隙结构和测井分析等资料,对鄂尔多斯盆地绥靖油田长2储层特征进行的研究。结果表明,研究区长2发育河流相沉积,储层以原生粒间孔为主,多属于大孔隙~中孔隙。排驱压力和饱和度中值压力较低、孔喉分选性较差、孔喉体积比较小,储层存储性和渗流性都较好。储层质量受沉积微相和成岩作用的综合影响,多种成岩作用普遍发育,成岩阶段属晚成岩A期。
The characteristics of Chang 2 reservoir in the Suijing Oil Field in Ordos Basin were studied based on the information of cast thin slices, scanning electron microscopy, physical properties, pore structure and log analysis. The results show that the fluvial facies in the study area 2 is developed, and the primary intergranular pores are the main reservoirs. Most of them belong to the macropores ~ mesopores. The median pressure of drainage and saturation is lower, the pore-throat selectivity is poor, the pore-throat volume is smaller, and the reservoir storage and seepage are better. The reservoir quality is affected by the combined effects of sedimentary microfacies and diagenesis, with various diagenesis generally developed and the diagenetic stage is late-diagenetic stage A.