基于油藏流场强度的井网优化方法研究

受地质情况、井网条件、流体物性影响，在注水开发油藏中的某些部位会出现以注入水快速突破、注入水无效 循环等为特征的不均衡驱替。对于非均质油藏，为了实现相对较高的均衡驱替，获得更高的原油采收率，布井时必须 充分考虑储层的非均质性进行井网优化设计。通过分析，选取油藏流场强度变异系数最小作为优化目标，建立了井网 优化数学模型，使用遗传算法求解数学模型，获取与储层非均质匹配的最优井网。油藏实例进行的分析结果表明，用 优化后的井网进行生产，水驱状况得到改善，提高了采收率。

Optimization of Well Patterns Based on Flow Field Intensity

With the impact of geology，well patterns and fluid properties，injected water will break fast and circulate invalidly in somewhere of the water flooding reservoir，which is the feature of unbalanced displacement. However，in order to pursue a relatively higher balanced displacement and attain more oil recovery for heterogeneous reservoirs，well pattern optimization design must consider the heterogeneity of reservoirs. Based on reservoir flow field，the optimal object is to minimize the coefficient of variation of streamline field intensity in the mathematical model. By solving the mathematical model of well pattern optimization with genetic algorithm to match the heterogeneity of reservoir，the optimal well allocation can be obtained. The analysis on the application of above theory in oil reservoir shows that the optimal well allocation can improve waterflooding situation and recovery.