摘要
为获得性能优良的压裂液体系,以α-甲基丙烯酸(MAA)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、N,N-二甲基丙烯酰胺(DMAM)、N-乙烯基己内酰胺(NVCL)为主要原料,通过溶液聚合法制备了新型四元聚合物稠化剂,并研究了该聚合物溶液的流变性能;以有机锆为交联剂制备交联凝胶,考察不同因素(交联比、剪切速率、温度)对交联过程流变动力学的影响。研究结果表明:在温度25℃、剪切速率170 s^-1下,质量分数0.6%的聚合物溶液的表观黏度为100 mPa·s,增黏效果好,具有明显的剪切变稀性,其流动曲线可用Cross模型进行表征;质量分数0.6%的聚合物溶液与交联剂在交联比100∶0.6下的交联效果良好,凝胶黏弹性较高;聚合物溶液交联过程可用四参数交联流变动力学方程进行表征,为该四元聚合物压裂液的应用提供了流变学研究基础。
In order to obtain fracturing fluid with excellent performance,a new type of quaternary polymer thickener was prepared by aqueous solution polymerization usingα-methacrylic acid(MAA),2-acrylamide-2-methylpro panesulfonic acid(AMPS),N,N-dimethyl acrylamide(DMAM),N-vinylcaprolactam(NVCL)as raw materials.The rheological properties of solutions at different mass concentrations were also studied.The polymer fracturing liquid gel system was prepared by using the organic zirconium cross-linked quaternary polymer.The effects of cross-linking ratio,shear rate and temperature on the cross-linking process were investigated.The result showed that the polymer had a strong viscosity-increasing ability with obvious shear thinning,the viscosity of 0.6%polymer solution was 100 mPa·s at the temperature of 25℃and at the sheer rate of 170 s^-1.The flow curve could be well fitted with the Cross model.The crosslinked gel synthesized by 0.6%thickener solution and crosslinker at a crosslinking ratio of 100∶0.6 had stronger viscoelastic properties.Moreover,the polymer cross-linking process could be well simulated by the four-parameter cross-linking rheokinetics equation,which provided a rheological research basis for the application of polymer fracturing fluid.
作者
张晓琪
汤鲁馨
方波
卢拥军
邱晓惠
翟文
ZHANG Xiaoqi;TANG Luxin;FANG Bo;LU Yongjun;QIU Xiaohui;ZHAIWen(Laboratory of Chemical Engineering Rheology,East China University of Science and Technology,Shanghai 200237,P R of China;Research Institute of Petroleum Exploration and Development,PetroChina,Langfang,Hebei 065007,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2020年第3期397-402,共6页
Oilfield Chemistry
基金
国家科技重大专项课题“储层改造关键流体开发”(项目编号2017ZX05023003)。
关键词
四元聚合物
流变性
交联凝胶
压裂液
交联流变动力学
quaternary polymer
rheology
crosslinked gel
fracturing fluid
cross-linking rheokinetics
