Gemini型阳离子/阴离子表面活性剂胶束体系的流变特性  

Rheological Properties of Cationic/Anionic Gemini Surfactant Micelle System

作　　者：翟文[1,2] 刘玉婷 邱晓惠[1,2] 刘萍 王丽伟[1,2] 许可 ZHAI Wen;LIU Yuting;QIU Xiaohui;LIU Ping;WANG Liwei;XU Ke(Research Institute of Petroleum Exploration&Development,PetroChina,Langfang,Hebei 065007,P R of China;Key Laborotary of Reservoir Stimulation,PetroChina,Langfang ,Hebei 065007,P R of China)

机构地区：[1]中国石油勘探开发研究院,河北廊坊065007 [2]中国石油油气藏改造重点实验室,河北廊坊065007

出　　处：《油田化学》2018年第4期638-642,共5页Oilfield Chemistry

基　　金：国家科技重大专项项目23课题3"储层改造关键流体研发"(项目编号2017ZX05023003)

摘　　要：为了提高Gemini表面活性剂体系的性能,研究了Gemini型阳离子表面活性剂丙撑基双(十八烷基二甲基氯化铵)(G3-18)、阴离子型表面活性剂α-烯基磺酸钠(AOS)和水杨酸钠(NaSal)复配形成胶束体系的流变特性,考察了复配体系的流动性、黏弹性、触变性和耐温性能。结果表明,3%G3-18+1.5%NaSal体系具有较好的流动性、黏弹性和触变性,在100℃、170 s-1条件下恒剪切90 min,保留黏度为30.83 mPa·s。随着AOS质量分数增加,3%G3-18+1.5%NaSal与AOS复配体系在0.01数10 Hz范围内黏性占主导的频率区间增加,弹性占主导的频率区间减小;同时,AOS质量分数增加使复配体系的应力过冲现象不断减弱,正触变环逐渐变小,反触变环逐渐变大。3%G3-18+0.20%AOS+1.5%NaSal的复配体系在100℃、170 s-1条件下恒剪切90 min,保留黏度为40.57mPa·s,比不加AOS体系的保留黏度提高了31.6%。In order to improve the performance of the clean fracturing fluid systems,the rheological properties of the micelle systems formed by cationic Gemini G3-18,anionic surfactant sodium(AOS)and sodium salicylate(NaSal)were investigated. The fluidity,viscoelasticity,thixotropy and temperature resistance of the systems was measured. The results showed that the 3% G3-18+1.5% NaSal system possessed good fluidity,viscoelasticity and thixotropy. After being sheared for 90 min at the temperature of 100℃ and at the shear rate of 170 s^-1,the viscosity of the system was 30.83 mPa·s. The viscous dominant frequency interval of 3%G3-18+1.5% NaSal+ AOS complex system increased while the elasticity dominant frequency interval reduced with increasing mass fraction of AOS in the range of 0.01-10 Hz. At the same time,the positive thixotropic ring gradually became smaller and the reverse thixotropic loop increased gradually with the AOS increased. After being sheared for 90 min at the temperature of 100℃ and at the shear rate of 170 s^-1,the viscosity of the 3% G3-18+1.5% NaSal+0.20%AOS mixture system remained 40.57 mPa·s,which was enhanced by 31.6% compared to that of the system without AOS.

关 键 词：Gemini型阳离子 阴离子 复配 流变特性 耐温性能 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]