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以胜坨油田坨21断块为研究对象,利用模糊数学方法求取非均质综合指数,来表征储层非均质特征;运用非均质综合指数建立储层非均质模型,分析储层层内、层间、平面和空间非均质性,探讨其与剩余油分布的关系。结果表明:研究区内储层的层内、层间非均质性以中等—较弱为主;平面和空间非均质性较为复杂,其分布与沉积微相的展布特征有很好的对应关系;储层非均质性的影响因素有沉积微相、成岩作用、长期注水开发和构造运动;研究区剩余油主要分布在砂体规模较大、呈中等—较弱非均质性的储层中。
Taking Tuo-21 fault block of Shengtuo Oilfield as the research object, the inhomogeneity index is calculated by using fuzzy mathematics method to characterize reservoir heterogeneity. The reservoir heterogeneity model is established by using heterogeneity comprehensive index to analyze reservoir Layer, layer, plane and space heterogeneity, explore its relationship with the remaining oil distribution. The results show that the in-reservoir and inter-reservoir heterogeneities in the study area are mainly medium-weak, and the planar and spatial heterogeneities are complex. The distribution and distribution characteristics of sedimentary microfacies are very good Corresponding relationship; Factors affecting reservoir heterogeneity include sedimentary microfacies, diagenesis, long-term waterflood development and tectonic movement. The remaining oil in the study area is mainly distributed in the sand body with large-scale, moderate-weak heterogeneity In the reservoir.