西南石油大学学报(自然科学版) ›› 2007, Vol. 29 ›› Issue (5): 105-107.DOI: 10.3863/j.issn.1000-2634.2007.05.29

• 油气化学工程与化工 • 上一篇    下一篇

复合体系中预接触时间对界面张力的影响

刘立伟1 侯吉瑞1 岳湘安1 于龙岩1 韩大伟2

  

  1. 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
  • 收稿日期:2007-03-26 修回日期:1900-01-01 出版日期:2007-10-20 发布日期:2007-10-20
  • 通讯作者: 刘立伟

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

LIU Li-wei1 HOU Ji-rui1 YUE Xiang-an1 et al   

  1. MOE Key Laboratory of Petroleum Engineering in China University of Petropleum, Beijing 102249,China
  • Received:2007-03-26 Revised:1900-01-01 Online:2007-10-20 Published:2007-10-20
  • Contact: LIU Li-wei

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。

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

Abstract: 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 1.3×10-3mN/m to 4.8×10-2mN/m,the curve between IFT and precontact time is regular. The equilibrium value of IFT increase smoothly with the lasting of precontact 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.

Key words: pre contact time, heavy alkylbenzene sulfonate, alkali, ionic strength, interfacial tension, Daqing crude oil

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