摘要
由于剩余油主要分布在小孔、微孔中,现有的化学驱油剂对低渗透油藏的驱油效果并不理想。研究利用岩石的静电吸附在固液界面形成分子膜,从而改变界面的润湿性,驱替出小孔中的残余油,提高驱油效率。超低渗透岩心实验结果显示,分子膜驱油在原来水驱基础上提高驱油效率10%,效果比较显著。
Because original oil mainly exists in micro-holes,the chemical displacement nowaday has little effect on oil field of low permeabilit.Our research is based on the theory that there will be a layer of monomolecular film by way of the static electricity absorption.Then the monomloecualr film can change the wettability of the surface and displace out the original oil in small holes.So the oil displacement will be raised.We have done many experiments with rocks of super-low permeability for about two years,and the results indicate that the monomolecular film could bring higher oil displacement efficiency than water displacement about 10%.The effect is very prominent.
出处
《断块油气田》
CAS
2007年第1期41-42,91-92,共2页
Fault-Block Oil & Gas Field
关键词
分子膜
采收率
润湿性
驱油效率
Monomolecular film,Oil recovery,Wettability,Oil displacement efficiency.
