Gemini型自增稠清洁压裂液流变特性  

Rheological Properties of Clean Fracturing Fluid with Self-thickening Gemini Surfactant

作　　者：熊家培 卢拥军[2] 邱晓惠[2] 方波[1] 明华[2] 翟文[2] 王梁元 刘玉婷[2] 王丽伟[2] XIONG Jiapei;LU Yongjun;QIU Xiaohui;FANG Bo;MING Hua;ZHAI Wen;WANG Liangyuan;LIU Yuting;WANG Liwei(Institute of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P R of China;Langfang Filial of Research Institute of Petroleum Exploration and Develop ment,PetroChina,Langfang,Hebei 065007, P R of China)

机构地区：[1]华东理工大学化学工程研究所,上海200237 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007

出　　处：《油田化学》2018年第1期60-63,74,共5页Oilfield Chemistry

基　　金：国家科技重大专项项目"高温清洁压裂液稠化剂合成与特性表征"(项目编号2017ZX05023003-004);863计划"致密砂岩气藏低伤害压裂液体系研究与应用"(项目编号2013AA064801);中国石油勘探开发研究院超前研究课题"空气泡沫压裂理论技术研究"(项目编号"专其他Y41601院")

摘　　要：为提高清洁压裂液的耐温性能、降低压裂液成本,以长碳链烷基酰胺丙基二甲胺、环氧氯丙烷、盐酸等为主要原料合成了Gemini型阳离子表面活性剂GX22,研究了GX22自增稠形成的清洁压裂液体系的流变性和耐温性。结果表明,在不加反离子盐的条件下,GX22溶于水即可形成胶束体系。GX22清洁压裂液具有明显的剪切变稀性,流动曲线可用Cross模型模拟;其触变性随GX22浓度的增加而增强,体系结构强度随浓度增加而增强;随角频率的增加,压裂液弹性模量G'和黏性模量G''均增加,且G'大于G'',体系以弹性为主;GX22清洁压裂液耐温性良好,含3%GX22清洁压裂液在110℃、170 s^(-1)下剪切90 min后的黏度为33.53 mPa·s。GX22合成步骤少、原料易得、产物无需后处理,压裂液配制简单,与同类型清洁压裂液相比,成本较低。In order to improve the heat resistance and lower the cost of clean fracturing fluid,a Gemini cationic surfactant GX22 was synthesized by long carbon chain alkyl amide propyl dimethylamine,epoxy chloropropane and hydrochloric acid. The heat resistance and rheology of clean fracturing fluid consisting of GX22 were investigated. The results showed that GX22 could form micelle system in aqueous solution without salt. The clean fracturing system was characterized by significant shear thinning property,and the flow curve of system could be described by Cross constitutive equation model. The thixotropy enhanced with increasing GX22 concentration,which meant the structural strength was stronger. The elastic modulus G＇ and viscous modulus G＇＇both increased when angular frequency increased,and G＇ was always greater than G＇＇,which indicated that the elastic modulus of fluids was predominant. The viscosity of clean fracturing fluid with 3% GX22 was 33.53 mPa·s after shearing for 90 minutes at 110℃ and 170 s^（-1）,showing good temperature resistance. Compared with the same type of clean fracturing fluid,the clean fracturing fluid with GX22 had such features as simple synthetic process,available raw materials and without product reprocess of GX22,easy preparation and low cost of fracturing fluid.

关 键 词：GEMINI表面活性剂 自增稠 清洁压裂液 耐温性 流变性 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]