在三元复合驱中,加入的碱与原油中的组分发生反应,使油水形成稳定的乳状液,所以油水分离变得比较困难。通过研究碱溶液与模型油形成的油水乳状液的稳定性表明,用碳酸钠作为碱,和原油中的胶质及沥青质反应,生成了界面活性泡沫。用氢氧化钠作为碱,在油藏滞留的时间里形成了羧酸钠盐。 In the ternary complex flooding, the added alkali reacts with the components in the crude oil to form a stable emulsion of the oil and water, so oil and water separation becomes more difficult. The stability of the oil-in-water emulsion formed by studying the alkali solution and model oil shows that the use of sodium carbonate as a base to react with the gums and asphaltenes in the crude oil produces an interfacial active foam. Sodium hydroxide is used as a base to form the sodium salt of the carboxylic acid during the residence time of the reservoir.