CO_2泡沫封窜提高采收率实验研究

Experimental Study on Enhanced Oil Recovery by CO_2 Foam Sealing

三维人造岩心可模拟油藏非均质性,如韵律性、渗透率极差、大孔道等,可以较为真实地模拟地层情况。泡沫是一种有效的封窜手段,通过不同注入时机下CO_2泡沫封窜提高采收率室内模拟实验,得出了以下结论 :气交替见效最快,泡沫驱提高采收率能力最强,但泡沫用量最大,在现场开发过程中针对气窜,前期选用CO_2/水交替注入方式延缓气体窜逸,气窜后选用泡沫封窜。

Three-dimensional artificial core can simulate reservoir heterogeneity,such as rhythm,poor permeability,large pore,etc.,can be more realistic simulation of the formation situation.Foam is an effective means of sealing,through the different injection time CO_2 foam sealing to improve the efficiency of indoor simulation experiments,the following conclusions ：the most effective gas replacement,foam flooding enhanced recovery capacity of the strongest,but The largest amount of foam,in the field development process for gas channeling,pre-selection of CO_2/water alternate way to delay the gas channeling,gas channeling after the use of foam sealing channeling.