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中文摘要：
碱、表面活性剂和聚合物组成的ASP复合体系中,加入的碱一方面能够使ASP复合体系与低酸值原油之间的界面张力降至很低水平,同时对乳化也起到重要作用,而碱的类型和加量直接影响该体系和原油形成界面张力的数量级及油水的乳化程度,因此系统分析了碱对乳状液形成及其稳定性的影响规律,有助于探讨碱在三元复合体系乳化过程中的作用机理。采用自行建立的乳化程度评价指标,对比了不同碱加量下的乳化程度,并采用析水率曲线评价了乳状液的稳定性。结果表明,随着碱含量的增加乳化程度增强,说明低界面张力有利于乳状液的形成;同时NaOH的质量分数在0.1%-0.3%时,复合体系与大庆油田原油形成的乳状液最稳定。
英文摘要：
For ASP system which consists of alkali,surfactant and polymer,alkali is not only to reduce the interfacial tension（IFT） between ASP and oil,but also to emulsify oil.The type and concentration of alkali impacts directly the magnitude of IFT and the degree of emulsification.Therefore,systematically investigating the impact of alkali on emulsion and its stability is helpful for understanding the mechanism of alkali on emulsification.Using the evaluation index developed for emulsification degree,the emulsification degree was compared under various alkali concentrations and the stability of emulsification was evaluated.It shows that lower IFT is helpful for forming emulsion and the degree of emulsion is increasing with the increase of alkali content.The emulsion formed by ASP and crude of Daqing oilfield is most stable with the NaOH weight concentration of 0.1%-0.3%.
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