低渗透油田水井转抽逆向驱油室内实验  

Indoor experiment of reverse flooding by converted injection wells in low permeability oilfields

作　　者：殷代印[1] 史连杰[1] 王国锋[2] 吴景春（审稿） 

机构地区：[1]大庆石油学院石油工程学院,黑龙江大庆163318 [2]大庆油田有限责任公司第九采油厂,黑龙江大庆163412 [3]不详

出　　处：《大庆石油学院学报》2006年第2期118-119,127,共3页Journal of Daqing Petroleum Institute

基　　金：黑龙江省自然科学基金(A2004-11)

摘　　要：通过常规水驱油实验和核磁共振实验,结合低渗透岩心孔隙结构分析,研究了人造岩心和天然岩心进行常规水驱后逆向驱油实验效果,初步探讨了注水井转抽改向驱油提高采收率的基本原理,为挖掘低渗透油田剩余油潜力提供实验依据.结果表明:当岩心渗透率在(20~40)×10-3μm2时,提高采收率的幅度最大,达到5%以上,但含水率下降所需要的时间最短,下降的幅度最大.Through conventional water flooding experiment and NMR experiment, combining them with core analysis, the results of reverse flooding experiment after conventional water flooding on artificial core and natural core are studied respectively. The basic mechanism of reverse flooding by converted injection wells is analyzed, providing an experiment base for tapping the residual oil of low permeability. The results show that when the permeability of core is (20～40)×10~ -3 μm^2, the recovery efficiency is the largest, and is more than 5%. But it takes the least time for the watercut to drop while magnitude of the drop is the largest.

关 键 词：逆向驱油 采收率 核磁共振 天然岩心 人造岩心 低渗透油田 

分 类 号：TE323[石油与天然气工程—油气田开发工程]