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为了挖掘剩余油,实现陈2断块的稳产,采用渗透率变异系数、突进系数和基尼系数分析了陈2断块阜宁组三段的层内、层间和平面的非均质性。受沉积微相的控制,单砂层垂向非均质模式以反韵律和复合韵律为主,层内非均质性较强,水下分流河道、席状砂和分流河口砂坝的渗透率变异系数、渗透率突进系数和基尼系数等3个参数依次减小;不同的沉积环境造成了砂层组之间存在着很强的层间非均质性;平面非均质性高于纵向非均质性,顺着物源方向,砂体连通性和物性较好,非均质性弱;垂直于物源方向,砂体连通性和物性较差,非均质性强。
In order to excavate the residual oil and realize the stable production of the Chen 2 fault block, the heterogeneity of layers, layers and planes in the third member of Funing Formation of Chen 2 block was analyzed by permeability coefficient, jerk coefficient and Gini coefficient. Under the control of sedimentary microfacies, the vertical heterogeneity pattern of single sand layer is dominated by anti-rhythm and compound rhythm with strong intra-layer heterogeneity. The permeability of underwater distributary channel, sheet sand and distributary estuary sand bar Coefficient of variation, coefficient of permeability and Gini coefficient of three parameters decreased in turn; different depositional environments resulted in strong inter-layer heterogeneity between sand groups; plane heterogeneity was higher than that of vertical Homogeneity, along the provenance direction, sand body connectivity and physical properties of good, weak heterogeneity; perpendicular to the direction of provenance, sand body connectivity and poor physical properties, strong heterogeneity.