芥酸型两性表面活性剂复配构筑高效耐盐黏弹性驱油体系  

Viscoelastic oil displacement system with remarkable salt tolerance via mixed zwitterionic surfactants

作　　者：韩玉贵 王业飞[1] 王秋霞 赵鹏 王弘宇 HAN Yugui;WANG Yefei;WANG Qiuxia;ZHAO Peng;WANG Hongyu(School of Petroleum Engineering in China University of Petroleum(East China),Qingdao 266580,China;Bohai Oilfield Research Institute of Tianjin Branch,CNOOC China Limited,Tianjin 300459,China)

机构地区：[1]中国石油大学(华东)石油工程学院 [2]中海石油(中国)有限公司天津分公司渤海石油研究院

出　　处：《中国石油大学学报（自然科学版）》2019年第6期165-170,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：“十三五”国家科技重大专项(2016ZX 05058003);长江学者和创新团队发展计划项目(IRT1294)

摘　　要：在模拟高温高盐油藏(矿化度为20 g/L,钙镁离子总质量浓度为0.5 g/L,油藏温度80℃)条件下,利用羧酸型芥酸酰胺基丙基甜菜碱(LJS)及磺酸型芥酸酰胺基丙基甜菜碱(LJH)进行复配,制得蠕虫状胶束体系,研究盐度、温度及老化时间对该体系黏度的影响。结果表明:在模拟高温高盐油藏的苛刻条件下,较低质量分数(0.3%)的复配体系S2H1(LJS与LJH质量比为2∶1)就可以使体系黏度达到42.2mPa·s,同时有效降低油水界面张力到10^-2 mN/m数量级;在提高盐度(钙镁离子总质量浓度为1.25 g/L)条件下,复配体系S2H1黏度和界面活性基本不变,进一步老化90 d后,体系仍然表现出良好的稳定性。The ultra-long-chain monounsaturated amidobetaine(LJS) and amidosulfobetaine(LJH) surfactants were combined to obtain the wormlike micelles system at the simulated reservoir conditions(Salinity is 20 g/L, [Mg^2+]+[Ca^2+]=0.5 g/L,temperature 80 ℃), through which the effects of salinity, temperature, and aging time on the viscosity were investigated. It is found that the viscosity of the S2H1aqueous solution with a low concentration(0.3%) can raise up to 42.2 mPa·s, and the interfacial tension of water/crude oil reaches 10-2mN/m order of magnitudeat the simulated harsh reservoir conditions. The viscosity and interfacial activity of the S2H1 system are almost unchanged at a higher salinity([Mg^2+]+[Ca^2+]=1.25 g/L). And this system still presents good stability after 90 d aging.

关 键 词：蠕虫状胶束 黏弹性 耐盐性 界面活性 驱油性能 

分 类 号：TE39[石油与天然气工程—油气田开发工程]