黏弹性六聚阳离子表面活性剂胶束压裂液体系流变性  

Rheology of a Viscoelastic Hexameric Cationic Surfactant Micellar Fracturing Fluid

作　　者：宾钰洁 韩晓阳 田珍瑞 武志颖 张思琪 方波[1] 卢拥军[2] BIN Yujie;HAN Xiaoyang;TIAN Zhenrui;WU Zhiying;ZHANG Siqi;FANG Bo;LU Yongjun(East China University of Science and Technology,Shanghai 200237;Research Institute of Petroleum Exploration and Development,Beijing 100803)

机构地区：[1]上海市多相结构材料化学工程重点实验室,华东理工大学流变学研究室,上海200237 [2]中国石油勘探开发研究院,北京100803

出　　处：《钻井液与完井液》2025年第2期262-274,共13页Drilling Fluid & Completion Fluid

基　　金：国家科技重大专项“储层改造关键流体研发”(2017ZX05023003);中石油科技重大专项“超高温清洁压裂液与变黏功能滑溜水研究”(2020B-4120)。

摘　　要：为开发黏弹性表面活性剂(VES)压裂液新稠化剂和新体系,以乙二胺、环氧氯丙烷、芥酸酰胺二甲基丙基叔胺(PKO-E)、氯乙酸钠为原料,分别研制了四聚阳离子表面活性剂(TET)、六聚阳离子表面活性剂(HET)和四聚两性离子表面活性剂(TZI),并将其与反离子盐溴化钾(KBr)、水杨酸钠(NaSal)形成黏弹性胶束,获得4种VES压裂液新体系。考察反离子盐种类和浓度和表面活性剂浓度对胶束体系流变性影响,获得黏弹性HET/KBr胶束体系的稳态黏度、流动曲线、黏弹性、触变性、热触变性及模量-温度曲线,以及HET/KBr胶束体系最优组成,建立四参数流变动力学方程描述黏度随剪切时间的变化曲线,建立四参数黏温方程描述HET/KBr体系温度触变性曲线,明确了HET/KBr、HET/NaSal、TET/KBr、TZI/KBr胶束体系流变性差异。初步考察了NaOH对HET/HSal延缓形成胶束的影响。In developing new viscoelastic(VES)thickening agents and new fracturing fluids,several raw materials,including ethylenediamine,epichlorohydrin,erucamide propyl dimethyl tertiary amine(PKO-E)and sodium chloroacetate were used to first produce tetrameric cationic surfactant(TET),hexameric cationic surfactant(HET)and tetrameric zwitterionic surfactant(TZI),and the surfactants were then reacted with counterion salts potassium bromide(KBr)and sodium salicylate(NaSal)to produce a viscoelastic micelle,from which four VES fracturing fluids were formulated.The effects of the types and concentrations of the counterion salts and the concentrations of the surfactants on the rheology of the micellar systems were investigated,and the steadystate viscosity,flow curve,viscoelasticity,thixotropy,thermal-thixotropy and the modulus-temperature curve of the viscoelastic HET/KBr micellar system,as well as the optimum composition of the HET/KBr micellar system were obtained.A four-parameter rheological dynamics equation and a four-parameter viscosity-temperature equation were developed to describe the change of viscosity with shearing time and the temperature thixotropy of the HET/KBr system,respectively.The rheological differences among the micellar systems HET/KBr,HET/NaSal,TET/KBr and TZI/KBr were also understood.The effects of NaOH on delaying the generation of micelles in the HET/HSal system were preliminarily investigated.

关 键 词：低聚表面活性剂 黏弹性表面活性剂 压裂液 流变性 流变动力学 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]