中国石油大学学报（自然科学版）2018，Vol.42Issue(2)：165-171,7.DOI:10.3969/j.issn.1673-5005.2018.02.021
阳离子/非离子复合表面活性剂改变油湿性砂岩表面润湿性机制
Mechanistic study on wettability alteration of oil-wet sandstone surface using mixed cationic-nonionic surfactants
摘要
Abstract
The surface tension,contact angle and zeta potential measurements were used to study adsorption models for CTAB/TX-100 mixtures on oil-wet sandstone surface and mechanism for wettability alteration of oil-wet sandstone surface using mixed cationic-nonionic surfactants. It is found that the mixed cationic-nonionic surfactants CTAB/TX-100 show better performance in changing wettability of oil-wet sandstone surface than single CTAB and TX-100. The CTAB and TX-100 present good synergis-tic effects. The pre-adsorbed CTAB molecules act as anchors on the oil-wet sandstone surface, allowing TX-100 molecules to form mixed aggregates with them through chain-chain interactions,which results in the promotion of TX-100 and CTAB adsorp-tion on oil-wet sandstone surface. Meanwhile,the ability of CTAB for forming ion pairs with carboxylic acid substances can be promoted by TX-100. And the adsorption and desorption capability of ion pairs are enhanced as well. Therefore,the mixed cat-ionic-nonionic surfactants show better effect on wettability alteration of oil-wet sandstone surface than single surfactants.关键词
阳离子表面活性剂/非离子表面活性剂/复合表面活性剂/油湿性砂岩/润湿性改变Key words
cationic surfactant/nonionic surfactant/mixed surfactant/oil-wet sandstone/wettability alteration分类
能源科技引用本文复制引用
王业飞,白羽,侯宝峰,王任卓,白群山,张希喜..阳离子/非离子复合表面活性剂改变油湿性砂岩表面润湿性机制[J].中国石油大学学报（自然科学版）,2018,42(2):165-171,7.基金项目
国家科技重大专项(2016ZX05058-003) （2016ZX05058-003）
长江学者和创新团队发展计划(IRT1294) （IRT1294）
