羟磺基甜菜碱表面活性剂的油水界面动力学及驱油性能研究

Oil-water Interface Dynamics and Oil Displacement Performance of Hydroxysulfobetaine Surfactant

表面活性剂因改善油水界面性能的优越特性常被应用于提高石油采收率。表面活性剂的影响对界面性质非常重要,这与多组分和多相系统界面处分子特性有关。采用分子动力学模拟技术,探讨3-(二甲基(辛基)氨基)-2-羟基丙烷-1-磺酸盐(DOAHS-Na)和亚油酰氨基丙基羟基磺内盐(DODEAHS-Na)的油水界面混合物在微观水平上的机理和界面行为,岩心物模驱油实验证明羟磺基甜菜碱表活剂混合体系在低渗透油藏驱油具有可行性,为现场应用提供了理论指导。

Surfactants are often used to improve the recovery of petroleum due to their superior ability to improve the oil-water interface performance.The influence of surfactants on the interface properties is crucial and is related to the molecular characteristics of the multi-component and multi-phase system interface.In this study,molecular dynamics simulation technology was used to investigate the mechanism and interface behavior of 3-(dimethylamino)ammonium-2-hydroxypropyl-1-sulfonate(DOAHS-Na) and di-(2-ethylhexyl)ammonium dodecylbenzenesulfonate(DODEAHS-Na) in the oil-water interface mixture at the micro level.The core flooding experiment proved that the mixture of hydroxysulfonic sweeteners was feasible for the low permeability reservoir,providing theoretical guidance for on-site application.