表面活性剂疏水链长对高温下泡沫稳定性的影响

高等学校化学学报

表面活性剂疏水链长对高温下泡沫稳定性的影响

曹绪龙², 何秀娟¹, 赵国庆¹, 宋新旺², 王其伟²,曹嫣镔³, 李英¹

1. 山东大学胶体与界面化学教育部重点实验室, 济南 250100;
2. 中国石油化学公司胜利油田地质科学研究院, 东营 257015;
3. 中国石油化学公司胜利油田采油工艺研究院, 东营 257017

收稿日期:2007-06-05 修回日期:1900-01-01 出版日期:2007-11-10 发布日期:2007-11-10
通讯作者: 李英

Effect of Hydrophobic Chain Length of Surfactants on Foam Stability at High Temperature

CAO Xu-Long², HE Xiu-Juan¹, ZHAO Guo-Qing¹ , SONG Xin-Wang², WANG Qi-Wei², CAO Yan-Bin³, LI Ying¹*

1. Key Laboratory for Colloid & Interface Chemistry of State Ministry of Education, Shandong University, Jinan 250100, China;
2. Geological Scientific Research Institute, Shengli Oilfield, Dongying 257015, China;
3. Oil Production Technology Institute, Shengli Oilfield, Dongying 257017, China

Received:2007-06-05 Revised:1900-01-01 Online:2007-11-10 Published:2007-11-10
Contact: LI Ying

摘要/Abstract

摘要： 选用不同疏水链长的α-烯烃磺酸盐(AOS)形成泡沫, 分别用泡沫衰减法和泡沫岩芯封堵法测定不同温度下的泡沫稳定性, 并采用动态表面张力、界面流变、分子模拟等方法研究了表面活性剂在气/液界面的吸附行为和界面吸附层的性质, 分析了高温下泡沫的稳定机制. 实验结果表明, 在高温下, 极性头的“锚定作用”减弱, 表面活性剂疏水链难以在气液界面保持以直立状态吸附, 疏水链碳数大于20的表面活性剂分子难以分立吸附, 其疏水链相互交叉缠绕, 增强了泡沫膜的强度, 减缓了气体通过液膜的扩散, 形成的泡沫在高温下具有较好的稳定性.

关键词: 泡沫稳定性, 高温泡沫, 泡沫封堵, 蒸汽驱, 疏水链长度

Abstract: The foam stability stabilized by α-olefin sulfonate(AOS) with different hydrophobic chain lengths at temperature below 100 ℃ and above 200 ℃ was investigated by foam column decay method and foam block in sand-pack pipe, respectively. The results show that the foam stability increases with the increase of hydrophobic chain length. Dynamic surface tension, interfacial rheometer and molecular simulation were used to study the foam stablity mechanism at a high temperature. From the experiment results, we can see that when the hydrophobic chain length was longer than 20 carbon atoms, the hydration of surfacrtant head could not support the hydrophobic chain to keep vertical or unattached, and the hydrophobic chains cross-link with each other, which increase the strength of the foam film, decrease the diffusion of the gas through the film and make the foam stable at a high temperature.

Key words: Foam stability, High temperature foam, Foam block, Steam flooding, Hydrophobic chain length

中图分类号:

O648.2+4

TrendMD:

曹绪龙,何秀娟,赵国庆,宋新旺,王其伟 ,曹嫣镔,李英 . 表面活性剂疏水链长对高温下泡沫稳定性的影响. 高等学校化学学报, doi: .

CAO Xu-Long², HE Xiu-Juan¹, ZHAO Guo-Qing¹ , SONG Xin-Wang², WANG Qi-Wei², CAO Yan-Bin³, LI Ying¹* . Effect of Hydrophobic Chain Length of Surfactants on Foam Stability at High Temperature. Chem. J. Chinese Universities, doi: .