Abstract Surfactant flooding is considered as one of the efficient chemical enhanced oil recovery techniques in recent decades as it has the potential ability to alter the wettability and reduce the interfacial tension of water-oil. Addition of surfactants has caused a dramatic decrease in the interfacial of water-oil. Thereby, the capillary number has increased and has caused to enhance oil mobilization in the porous media. In this paper, a cationic surfactant of Cetyl trimethyl ammonium bromide and an anionic surfactant of linear alkylbenzene sulfonic acid were used to consider their effect on the interfacial tension and oil recovery factor. According to the results of this study, the anionic surfactant of linear alkylbenzene sulfonic acid has the highest recovery factor of 70%, and cationic surfactant of Cetyl trimethyl ammonium bromide has the second-highest oil recovery factor of about 55%. Therefore, the addition of surfactants due to its beneficial impact on the interface adsorption between oil and water would be an essential point on the oil recovery enhancement as it can increase the oil recovery factor. Moreover, the critical micelle concentration value is about 300 ppm and 250 ppm for anionic and cationic surfactants respectively where the two crosslines meet each other and anionic has the highest interfacial tension rather than cationic which has caused to have more oil recovery factor.

中文翻译：

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阴离子和阳离子表面活性剂界面张力对提高采收率的影响

摘要 表面活性剂驱具有改变水-油润湿性和降低界面张力的潜在能力，被认为是近几十年来有效的化学提高采收率技术之一。添加表面活性剂导致水油界面急剧下降。因此，毛细管数增加并导致提高多孔介质中的油流动性。本文采用十六烷基三甲基溴化铵阳离子表面活性剂和直链烷基苯磺酸阴离子表面活性剂，考察它们对界面张力和采收率的影响。根据本研究结果，直链烷基苯磺酸阴离子表面活性剂的回收率最高，可达70%，鲸蜡基三甲基溴化铵阳离子表面活性剂的采油率次高，约为55%。因此，由于表面活性剂对油水界面吸附的有益影响，因此添加表面活性剂将是提高采收率的关键，因为它可以提高采收率。此外，阴离子和阳离子表面活性剂的临界胶束浓度值分别约为 300 ppm 和 250 ppm，其中两条交线彼此相遇，阴离子的界面张力最高，而不是阳离子，这导致了更高的采油率。由于表面活性剂对油水界面吸附的有益影响，因此添加表面活性剂将是提高采收率的关键，因为它可以提高采收率。此外，阴离子和阳离子表面活性剂的临界胶束浓度值分别约为 300 ppm 和 250 ppm，其中两条交线彼此相遇，阴离子的界面张力最高，而不是阳离子，这导致了更高的采油率。由于表面活性剂对油水界面吸附的有益影响，因此添加表面活性剂将是提高采收率的关键，因为它可以提高采收率。此外，阴离子和阳离子表面活性剂的临界胶束浓度值分别约为 300 ppm 和 250 ppm，其中两条交线彼此相遇，阴离子的界面张力最高，而不是阳离子，这导致了更高的采油率。