低渗透油藏水驱注采压差优化研究  

Waterflooding Injection-Production Pressure Difference Optimization in Low-Permeability Reservoir

作　　者：崔传智[1] 安然[1] 李凯凯 姚荣华[1] 王鹏[1] 

机构地区：[1]中国石油大学(华东),山东青岛266580 [2]中国石油长庆油田分公司,陕西榆林718600

出　　处：《特种油气藏》2016年第3期83-85,154-155,共3页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"特高含水后期多措施协同优化研究"(2016ZX05010003-006);教育部创新团队发展计划"复杂油藏开发和提高采收率的理论和技术"(IRT1294)

摘　　要：针对渤南五区低渗透油藏储层非均质性强、剩余油分布复杂、水驱动用程度差异大的问题,以五点法井网为例,根据流线分布特征,将井网划分为多个计算单元,利用流管法计算得到各个计算单元水驱开发指标。以均衡驱替为目标,以各计算单元内的注采压差为优化变量,综合考虑储层物性及剩余油分布的非均质性,应用优化算法,得到了各计算单元的最优注采压差。研究表明,各计算单元的剩余油饱和度差异越大,达到均衡驱替时要求的时间越短,各调控单元所需的注采压差相差也越大。数值模拟结果表明,该注采压差优化方法能够明显减少各分区的剩余油分布差异,提高采收率2.6%。研究成果可有效指导低渗透水驱油藏开发决策的制订。The low-permeability reservoirs in Block 5 of Bonan are characterized by strong reservoir heterogeneity,complex distribution of residual oil and great difference in waterflooding producing level. Five-spot well network is divided into multiple computing units by considering stream distribution and stream-tube method is used to determine the waterflooding indexes in each computing unit. The heterogeneities of reservoir properties and residual oil distribution are comprehensively taken into consideration and optimization algorithm is used to gain the optimum injection- production pressure difference in each computing unit by taking equilibrium displacement and injection-production pressure difference as optimizing goal and variable respectively. Research shows that there are great differences in remaining oil saturations of different computing units and the period to reach equilibrium displacement decreases with the increase of difference in injection-production pressure difference in each computing unit. Reservoir numerical simulation indicates that this optimization could significantly reduce the residual oil distribution difference and increase recovery degree by 2. 6%. This research could provide certain guidance for the development decision of low-permeability waterflooding reservoir.

关 键 词：低渗透油藏 高含水期 均衡驱替 计算单元 注采压差 渤南五区 

分 类 号：TE348[石油与天然气工程—油气田开发工程]