Micellar Aggregation Behavior of Alkylaryl Sulfonate Surfactants for Enhanced Oil Recovery.
Alkylaryl sulfonate is a typical family of surfactants used for chemically enhanced oil recovery (EOR). While it has been widely used in surfactant-polymer flooding at Karamay Oilfield (40 °C, salinity 14,000 mg/L), its aggregation behavior in aqueous solutions and the contribution of aggregation to EOR have not been investigated so far. In this study, raw naphthenic arylsulfonate (NAS) and its purified derivatives, alkylaryl monosulfonate (AMS) and alkylaryl disulfonate (ADS), were examined under simulated temperature and salinity environment of Karamay reservoirs for their micellar aggregation behavior through measuring surface tension, micellar size, and micellar aggregation number. It was found that all three alkylaryl sulfonate surfactants could significantly lower the surface tension of their aqueous solutions. Also, it has been noted that an elevation both in temperature and salinity reduced the surface tension and critical micellar concentration. The results promote understanding of the performance of NAS and screening surfactants in EOR.
['Luan|Huoxin|H|', 'Gong|Lingyan|L|', 'Yue|Xinjian|X|', 'Nie|Xiaobin|X|', 'Chen|Quansheng|Q|', 'Guan|Dan|D|', 'Que|Tingli|T|', 'Liao|Guangzhi|G|', 'Su|Xin|X|', 'Feng|Yujun|Y|']
D000476:Alkanesulfonates D008823:Micelles D009821:Oils D013500:Surface Tension D013501:Surface-Active Agents D013696:Temperature D014867:Water
micellar aggregation behavior alkylaryl sulfonate surfactant enhanced oil recovery surface tension critical micellar concentration