烷基糖苷对润湿性的改变及与界面张力的关系  

Alkyl Glycoside Caused Wettability Alteration and Its Relationship with Interfacial Tension

作　　者：孙琳[1] 蒲万芬[1] 辛军 吴雅丽 

机构地区：[1]西南石油大学石油工程学院,成都610500 [2]中石油川庆钻探公司地质勘探开发研究院,成都610051 [3]中海油能源发展采油技术服务公司,天津300452

出　　处：《地质科技情报》2013年第1期172-175,共4页Geological Science and Technology Information

基　　金：国家科技重大专项专题(2011ZX05049-004-004);中央财政支持地方特色重点学科建设项目专项资金

摘　　要：降低界面张力、改变润湿性是表面活性剂应用于油田开发的重要特性。通过测量表面活性剂烷基糖苷溶液的表面张力及其与亲水(亲油)载玻片、原油间的接触角,研究了表面活性剂对油藏润湿性的改变行为。结果表明,表面活性剂分子在水固界面和油水界面的吸附使润湿性发生变化,且其在水固界面的吸附模式是决定润湿性改变的关键。同时,在测定油水界面张力,计算水固、油固界面张力的基础上,利用灰色关联分析确定了各界面张力对润湿性的影响程度:水固界面张力>油水界面张力>油固界面张力。可见,在利用表面活性剂改变润湿性的过程中,尤其应注意水固界面状态的变化。IFT reduction and wettability alteration are the important characteristics of surfactant when it was used in oil field development. By measuring the surface tension of alkyl glycoside solution and the con- tact angle of water--wet,oil--wet glass slid, oil and alkyl glycoside solution, this paper studied the surfac- rant caused by wettablity alteration. The results show that the adsorption of surfactant molecules on wa- ter,solid interface and oil,water interface makes wettability alteration, and that the adsorption mode of surfactant molecules on water, solid interface is the key to wettability alteration. Meanwhile, after measur- ing oil,water IFT, counting water,solid IFT and oil,solid IFT, this paper utilized grey relation analysis to ascertain the effect degree of different IFT on wettability： water, solid IFT〉oil,water IFT〉oil, solid IFT. Therefore, by means of using surfactant to alter wettability, attention should be paid to the variation of water/solid interface state.

关 键 词：润湿性 界面张力 接触角 吸附 灰色关联 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]