微凝胶调驱效果实验研究

为考察可动微凝胶这一新型调驱体系在非均质模型中的调驱效果,采用人造填砂管模型,对该体系进行了室内实验评价。结果表明,微凝胶可明显改善低渗层的分流量,具有较好的改善注入剖面效果。当注入0.3 PV浓度2 000 mg/L的可动微凝胶时,可提高采收率7.7%;浓度越高,注入量越大,驱油效果越好,但当注入量超过0.3 PV以后,采收率增加幅度已不太明显。

Experimental study on the profile controlling displacement effect of microgel

In order to make clear the profile controlling displacement effect of soft microgel,which is a new profile control system,in the heterogeneous model,sand pack model was adopted to evaluate laboratory experiments.The results showed that the soft microgel can significantly improve shunt flow volume of low permeability layer,and it has a good effect on in-depth profile control.When soft microgel was injected by 0.3 pore volume and 2 000 mg/L,oil recovery was enhanced by 7.7%.And the results also showed that the higher the concentration and injection volume,the better oil displacement efficiency was,but when the injection volume was over 0.3 pore volume,the increasing extent of oil recovery has little change.