表面活性剂增效碱驱中表面活性剂之间的协同效应

本文考虑了在碱（Ｎａ２ＣＯ３）性条件下表面活性剂之间在界面张力性质、耐盐性及驱油效率等方面的协同效应。实验结果表明，阴离子表面活性剂（石油磺酸盐）与非离子表面活性剂之间的复配，除在界面张力性质方面显现出比石油磺酸盐之间更好的协同效应外，石油磺酸盐在较高矿化度下的溶解性也获得根本改善，能够顺利通过孔隙介质并获得较高的驱油效率，长期放置亦无沉淀发生，为热力学稳定体系。

THE SYNERGISM BETWEEN SURFACTANTS IN SURFACTANT-ENHANCED ALKALINE FLOODING

In this paper, the synergitie behavior between surfactants in the inter facial tension (IFT), salinity tolerance, and oil recovery under alkaline condition has been examined. For a mixed petroleum sulfonates system, this synergism only behaved as IFT reduction and dynamic properties. For the mixtures of anionic surfactant (a petroleum sulfonate) and nonionic surfactant (a derivative of carboxylic acid) which is a stable system shows better synergism on the IFT behavior, salinity tolerance and oil recovery.