毛管力标定技术在低渗透油藏数值模拟中的应用

APPLICATION OF CAPILLARY-PRESSURE SCALING TECHNIQUE IN LOW-PERMEABILITY-OIL-RESERVOIR NUMERICAL SIMULATION

由于低渗透裂缝性油藏平面非均质性较强，在数值模拟中，采用常规平衡启动方法不能应用测井解释的饱和度表征非均质性分布状况，而毛管力标定初始饱和度启动方法既具有常规平衡启动计算速度快、收敛性好的优势，同时也应用TN井解释的含油饱和度。实例证明，该标定方法能较真实地描述油藏的非均质性，提高模型含水拟合的效率与精度，量化评价历史拟合质量，为剩余油研究和方案优选及指标预测奠定了良好基础。

Planar heterogeneity of low-permeability fractured oil reservoir is much stronger, the conventional equi- librium initialization method can＇t be applied to characterize the heterogeneous distribution by the saturation inter- preted by well loggings in the numerical simulation. The initializing method by the initial saturation scaled by the capillary pressure not only has the advantage in high-speed computation and good convergence of the common equi- librium initialization, but takes advantage of the logging-interpreted oil saturation. The practice shows that the method can really describe the heterogeneity of the reservoirs, improve the efficiency and precision of the water-cut history matching. The method can quantitatively evaluate the qualities of the history matching, thus the much better foundations have been laid for the remained oil studies, program optimization and the indices prediction.