复合体系中预接触时间对界面张力的影响  

THE INFLUENCE OF PRE-CONTACT TIME ON THE INTERFACIAL TENSION IN COMBINATIVE SYSTEM

作　　者：刘立伟[1] 侯吉瑞[1] 岳湘安[1] 于龙岩[1] 韩大伟[2] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京昌平102249 [2]大庆油田第七采油厂,大庆163517

出　　处：《西南石油大学学报（自然科学版）》2007年第5期105-107,共3页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重点基础研究发展计划(973计划)专题(2005CB221303)

摘　　要：研究了预接触时间对NaCl/碱/重烷基苯磺酸盐/大庆原油体系界面张力的影响。结果表明,随着预接触时间的延长,体系界面张力最低值上升,当预接触时间由20min延长到1440min时,界面张力最低值由1.3×10-3mN/m上升为4.8×10-2mN/m,并且曲线具有一定规律性;界面张力平衡值随着预接触时间的延长缓慢上升,在120min前基本保持不变,在120min后上升为0.01mN/m以上,并平稳上升。同时,验证了原油中的活性物质对降低界面张力起到重要作用。The influence of pre-contact time on the interfacial tension of alkali/surfactants/crude oil system is studied. The result shows that the value of the minimum IFT rises with the increase of the pre-contact time, when the pre-contact time lasts from 20 minutes to 1 440 minutes, the minimum IFT will rise from 1.3×10-3 mN/m to 4.8×10-2 mN/m,the curve between IFT and pre-contact time is regular. The equilibrium value of IFT increase smoothly with the lasting of pre-contact time, it is a constant during the first 120 minutes, and then past 0.01 mN/m and keeps increasing smoothly after the 120 minutes. At the same time, it validates that the active substance in the oil has a important function in decreasing the interfacial tension.

关 键 词：预接触时间 重烷基苯磺酸盐 碱 离子强度 界面张力 大庆原油 

分 类 号：TE357[石油与天然气工程—油气田开发工程]