基于油藏流场强度的井网优化方法研究  

Optimization of Well Patterns Based on Flow Field Intensity

作　　者：冯其红[1] 王波[2] 王相[1] 王守磊 韩晓冬 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油长庆油田分公司,陕西西安710018 [3]中海油研究总院,北京朝阳100028 [4]中海石油(中国)有限公司天津分公司,天津塘沽300452

出　　处：《西南石油大学学报（自然科学版）》2015年第4期181-186,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重大科技专项(2011ZX05011-002);长江学者和创新团队发展计划(IRT1294)

摘　　要：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。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.

关 键 词：井网优化 均衡驱替 油藏流场 变异系数 提高采收率 

分 类 号：TE329[石油与天然气工程—油气田开发工程]