新型清洁压裂液25-HP-21/NaSal胶束体系流变性研究  

Rheological properties of a novel clean fracturing fluid:the micellar system of 25-HP-21/NaSal

作　　者：崔秀 方波[1] 许海涛 CUI Xiu;FANG Bo;XU Hai-tao(Laboratory of Chemical Engineering Rheology,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化工学院化工流变室,上海200237

出　　处：《日用化学工业》2020年第10期653-659,668,共8页China Surfactant Detergent & Cosmetics

基　　金：国家科技重大专项课题“储层改造关键流体研发”项目资助(2017ZX05023003)。

摘　　要：以芥酰胺丙基二甲胺、油酰胺丙基二甲胺、环氧氯丙烷为主要原料合成了新型不对称阳离子Gemini表面活性剂羟丙撑基(芥-油酰胺丙基二甲基氯化铵醋酸铵)(25-HP-21),将其与水杨酸钠(NaSal)进行复配研究了该黏弹性胶束体系的流变学性质、微流变学性质、耐温性能和携砂性能,并采用~1H NMR表征了NaSal对25-HP-21胶束聚集形态的影响。研究结果表明:在体系中25-HP-21含量固定为2%的情况下改变NaSal的含量,得出25-HP-21/NaSal胶束体系的优化配比为5∶1(w/w);另外,在固定25-HP-21/NaSal的质量比为5∶1的情况下改变表面活性剂的浓度,则发现3.6%的25-HP-21/NaSal胶束体系具有更优的黏弹性、更显著的剪切变稀性和触变性以及较优的耐温性能和携砂性能;体系的~1H NMR谱图结果表明NaSal的加入有利于促进蠕虫状胶束的形成,表面活性剂分子排列更加紧密。该胶束体系配方简单、性质优异,有望丰富新型清洁压裂液。Erucamidopropyl dimethylamine,oleamidopropyl dimethylamine and epichlorohydrin were used as the main raw materials to synthesize a novel asymmetric cationic Gemini surfactant,i.e.hydroxypropylene(erucamido-oleamido propyl dimethyl ammonium)chloride acetate(25-HP-21).Then 25-HP-21 was mixed with sodium salicylate(NaSal)to obtain a viscoelastic micellar system.The rheological properties,microrheological properties,temperature-resistance and sand-carrying properties of the micellar system were studied.The effects of NaSal on the aggregate morphology of 25-HP-21 micelles was characterized by 1H NMR.The results showed that,when the content of 25-HP-21 in the mixed system was fixed to 2%,the optimized ratio of 25-HP-21/NaSal for this micellar system was 5∶1(w/w).In addition,when the mass ratio of 25-HP-21/NaSal was fixed to 5∶1,the micellar system of 3.6%25-HP-21/NaSal showed better viscoelasticity,temperature-resistance and sand-carrying properties and more significant shear thinning and thixotropy.The 1H NMR spectrum of the system showed that the addition of NaSal was beneficial to the formation of worm-like micelles,and the arrangement of surfactant molecules were more compact.This micellar system had a simple formula and excellent properties,which was expected to enrich the family of novel clean fracturing fluids.

关 键 词：GEMINI表面活性剂 清洁压裂液 胶束体系 流变学性质 微流变学性质 

分 类 号：TQ423[化学工程]