摘要
非均质岩心物理模拟实验证实在三元复合驱前实施前置段塞调剖能够提高三元复合驱的驱油效果。当前置段塞较小时。凋剖后可提高原油采收率1．3％．进行0．0500～0．2500倍孔隙体积的三元复合调剖驱，与常规三元复合驱相比，采收率增加2．0％～4．9％．中置调剖段塞为0．2000倍孔隙体积较好。并联非均质模型中的流量分配和采收率变化说明，交联体系注入后。高渗透层的流量降低。中、低渗透层的流量增加。中、低渗透层的采收率增加幅度明显。
Physical simulation experiments of heterogeneous cores show that it can enhance oil recovery efficiency of ASP flooding to perform 'ahead slug' profile control before ASP flooding. When ahead slug is small, it can enhance oil recovery efficiency by 1.3% after profile control. Compared with the normal ASP flooding, it can enhance oil recovery efficiency by 2.0%～4.9% to perform ASP composite profile control flooding of 0.05～0.25 times of pore volume. When the middle slug of profile control is 0.20 times of pore volume, better results can be obtained. Flow allocation and oil recovery of parallel heterogeneous model show that flow rate of high permeable formation is lowered and flow rate of middle and low permeable formation is increased after crosslinking system is injected. The recovery of middle and low permeable formation is obviously increased.
出处
《大庆石油学院学报》
CAS
北大核心
2005年第1期30-32,36,共4页
Journal of Daqing Petroleum Institute
关键词
:三元复合驱
调剖
流量分配
非均质岩心
驱油
ASP flooding
profile control
flow allocation
heterogeneous core
oil displacement
