芥酸酰胺丙基二甲基叔胺改性纤维素溶液的流变性能与交联性能  

Rheological Properties of Erucamidopropyl Dimethylamine Modified Carboxymethyl Hydroxyethyl Cellulose Solutions

作　　者：樊悦 金浩[1] 方波[1] 卢拥军[2] 邱晓惠[2] 孙瑞 FAN Yue;JIN Hao;FANG Bo;LU Yongjun;QIU Xiaohui;SUN Rui(College of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,P R of China;Langfang Branch ofResearch Institute of Petroleum Exploration and Development,PetroChina,Langfang,Hebei 065007,P R of China)

机构地区：[1]华东理工大学化工学院,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》2019年第2期209-214,共6页Oilfield Chemistry

基　　金：国家科技重大专项“储层改造关键流体研究”(项目编号2017ZX05023003)

摘　　要：为了改善纤维素溶液的增稠能力和交联性能,合成了一种新型疏水醚化改性剂(3-氯-2-羟丙基芥酸酰胺醋酸铵),并采用该改性剂对羧甲基羟乙基纤维素(CMHEC)进行疏水改性,首次制得了芥酸酰胺丙基二甲基叔胺疏水改性纤维素(ED-CMHEC),研究了CMHEC和ED-CMHEC溶液的流变性能(表观黏度、流动曲线、触变性和黏弹性)和交联性能。研究结果表明,改性后ED-CMHEC溶液的表观黏度得到显著提升并表现出更显著的触变性与黏弹性。质量分数0.3%的CMHEC和ED-CMHEC溶液在30℃、170s-1的表观黏度分别为18mPa·s和71mPa·s,后者较前者提高了2.94倍。不同质量分数(0.3%数0.5%)的CMHEC和ED-CMHEC溶液均表现出剪切变稀性质,其流动曲线可用Cross模型进行描述。有机锆交联剂FAC-201加量为0.2%时,质量分数0.3%ED-CMHEC溶液交联形成凝胶的黏度是改性前的2.4倍,表现出更强的交联性能。To improve the thickening ability and crosslinkingperformance of cellulose,widen its application in fracturing fluid field,a new kind of hydrophobic etherifying agent(3-chloro -2-hydroxypropylerucylamideammonium acetate)was prepared to modify carboxymethyl hydroxyethyl cellulose (CMHEC). Hydrophobic erucamidopropyl dimethylamine carboxymethyl hydroxyethyl cellulose (ED-CMHEC) was first prepared. The rheological and crosslinking experiments of CMHEC and ED-CMHEC were carried out. The results showed that ED-CMHEC solutions exhibited higher viscosities,more apparent thixotropy and viscoelasticity,compared to CMHEC solution. At the mass fraction of 0.3%,the viscosity of CMHEC and ED-CMHEC solutions at the temperature of 30℃ and at the shearing rate of 170 s^-1 were 18.0 mPa·s and 71 mPa·s,respectively. The shear thinning behaviors of CMHEC and ED-CMHEC solutions at different concentrations could be well described by Cross model. Under the same crosslinking conditions that the dosage of zirconium organic crosslinker was 0.2%,the viscosity of gel formed by 0.3% ED-CMHEC solution was 2.4 times than that by 0.3% CMHEC solution,which indicated that ED-CMHEC had a stronger crosslinking performance.

关 键 词：羧甲基羟乙基纤维素 芥酸酰胺丙基二甲基叔胺 疏水改性 流变性 压裂液 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]