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本文回顾了动介面张力研究的历史及其发展过程,阐述了表面活性剂提高碱水驱油过程所产生的动界面张力问题。研究采用了 David Lloydmin-ster 原油、钠、碳酸钠、苛性钠、氯化钠及表面活性剂 Neodol25—3S 通过5个 Barea 砂岩岩心驱替实验,表明动界面张力随表面活性剂浓度变化而变化。David 原油与含有Neodol25—3S、Na_2CO_3水溶液接触时.在高含盐度条件下也能产生低的 IF 值的动态特性.原油采收率与初始 IFT 有着密切的关系,而平衡状态下的影响力与之无关。
This paper reviews the history of dynamic interface tension and its development process, and expounds the problem of dynamic interface tension caused by surfactants in improving alkali-surfactant flooding. The experiments used David Lloydmin-ster crude oil, sodium, sodium carbonate, caustic soda, sodium chloride, and surfactant Neodol 25-3S to displace experiments with five Barea sandstone cores, showing that the dynamic interfacial tension varies with the surfactant concentration. When David crude oil comes into contact with Neodol25-3S and Na_2CO_3 aqueous solution, it can produce low IF dynamic properties even under high salinity conditions.The crude oil recovery is closely related to the initial IFT, while the influence under equilibrium Has nothing to do with it.