硫酸盐型孪连表面活性剂的界面性能  

Interfacial Performance of Di-n-alkyl Disulfate Surfactants

作　　者：刘平[1] 吕成远[1] 李阳[2] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石化股份有限公司,北京100029

出　　处：《精细化工》2011年第12期1169-1172,共4页Fine Chemicals

基　　金：中石化科技攻关项目(P10092)~~

摘　　要：考察了自制的双直链烷基硫酸盐型孪连表面活性剂的界面性能和驱油性能。结果表明,双直链烷基硫酸盐型孪连表面活性剂的CMC在10-5～10-6 mol/L;随着表面活性剂浓度的增加,界面张力达到平衡时所需要的时间明显延长;随着连接基团碳链长度的增加,油水界面张力先增大再减小;该类孪连表面活性剂具有非常好的抗一价盐二价盐的能力;用2C13-C2-2SO4Na作为驱油剂进行驱油实验时,可以使采收率在水驱基础上提高5%以上,具有比较好的驱油效果。The interfacial performance and oil displacement of the self-made di-n-alkyl disulfate surfactants were studied. The results show that the CMC values of the surfactants were in the range of 10-5 to 10-6 mol/L. The time taken for the interracial tension to reach equilibrium significantly extended with the increase of Geminis concentration. As the spacer length increased, the interracial tension first increased to a certain point and then decreased. The Geminis displayed outstanding salt resistance. 2C13-C2-2SO4Na,as the oil displacement agent,could increase EOR by more than 5% after water flooding in core flooding experiment.

关 键 词：孪连表面活性剂 临界胶束浓度 界面张力 抗盐性 采收率 

分 类 号：TQ423[化学工程]