摘要
大庆油田杏二区三元复合驱采出液化学组成分析表明 ,矿场试验中、后期采出液内含有较高浓度的聚合物和其它一些注入化学成分。通过在人造和天然岩心上对采出液及其与普通三元体系以不同注入方式组合的流动特性进行实验研究 ,结果表明 :只要采出液中所含聚合物浓度较高 ,其通过岩心后可以获得较高的阻力系数和残余阻力系数。而且使用采出液作为前置液时还可以提高普通三元体系的阻力系数和残余阻力系数。
The analysis of produced fluid's chemical composition by three-component compound flooding in Daqing Xing-2 area shows that the produced fluids at middle and later stage in field experiments contain polymer with higher concentration and some of other injected chemical compositions. We made experimental study on the produced fluids and their flowing property on the man-made and natural cores. The results indicate that if the polymer concentration in produced fluids is high, across the core the produced fluids will get higher resistance coefficient and residual resistance factor. So using the produced fluids as preflush will increase the resistance coefficient and resistance factor in common three-component system.
关键词
三元复合驱
流动性质
采出液
采收率
三次采油
three-component compound flooding, produced fluid, resistance coefficient, residual resistance factor, experimental study
