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为表征鄂尔多斯盆地低渗储层的微观非均质性,采用铸体薄片、扫描电镜、压汞等测试手段,研究姬塬地区低渗砂岩储层微观非均质性特征及影响因素,并结合多参数模糊聚类分析,将储层微观非均质性划分为较弱、中等和较强3类.通过真实砂岩模型水驱油实验,刻画了3类不同非均质程度模型的流体运动及水驱前缘形态的差异性.室内测试分析研究、地质学定量统计分类及真实砂岩模型水驱油实验相结合的综合研究方法,真实反映低渗储层微观非均质性,对同类储层研究具借鉴意义.
In order to characterize the microscopic heterogeneity of low permeability reservoirs in the Ordos Basin, microscopic heterogeneities and influencing factors of low permeability sandstone reservoirs in Jiyuan area were studied by means of test specimens such as cast thin sections, scanning electron microscopy and mercury intrusion. The multi-parameter fuzzy clustering analysis divides the reservoir micro-heterogeneity into three classes: Weak, moderate and strong.Through the actual oil-water displacement experiment of sandstone model, the fluid motion of three different heterogeneity models and The difference of the front forms of waterflooding: The comprehensive study method of indoor test and analysis, quantitative and statistical classification of geology and water-flooding experiment of real sandstone model truly reflects the micro-heterogeneity of low-permeability reservoirs, Research with reference significance.