耐盐性PAM-AMPS/Fe3O4纳米减阻剂流变性
Rheological Properties of PAM-AMPS/Fe3O4 Nano Drag Reducing Agent With Salt Tolerance
秦文龙 1李璐 2李国庆 2李晗晰 2秦国伟2
作者信息
- 1. 西安石油大学陕西省油气田特种增产技术重点实验室,陕西西安 710065;西安石油大学石油工程学院,陕西西安 710065
- 2. 西安石油大学陕西省油气田特种增产技术重点实验室,陕西西安 710065
- 折叠
摘要
采用丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸(AM/AMPS)共聚物接枝纳米Fe3O4合成了一种PAM-AMPS/Fe3O4纳米减阻剂,并利用动态流变仪研究了 PAM-AMPS/Fe3O4减阻剂的剪切稀释性,分析了纳米Fe3O4、盐含量及剪切作用对其流变行为的影响规律.结果表明:PAM-AMPS/Fe3O4纳米减阻剂的粒径为100～500 nm)黏均分子质量为4.99× 106 g/mol;在30 ℃下,剪切速率大于0.3 s-1时PAM-AMPS/Fe3O4减阻剂表现出显著的剪切稀释特征,该减阻剂具有更复杂的微观结构,其超临界质量分数为0.035％,相比空白聚合物表现出更优良的增黏性能和黏弹性;由于AMPS含有耐温耐盐基团,在NaCl和CaCl2质量分数分别为10％和5％的条件下,PAM-AMPS/Fe3O4减阻剂黏度保留率分别为69％和53％,表现出了较强的耐盐性;同时,该减阻剂在剪切速率1000 s-1条件下剪切3600、7200 s后的黏度回复率分别为100％和94％,表现出良好的耐剪切性.
Abstract
In this study,a PAM-AMPS/Fe3 O4 nano drag reducing agent was synthesized by grafting acrylamide/2-acrylamido-2-methylpropane sulfonic acid(AM/AMPS)copolymer onto nano Fe3O4,the shear dilution of PAM-AMPS/Fe3O4 drag reducing agent was studied by dynamic rheometer,and the influence law of nano-Fe3O4,salt content and shearing action on their rheological behavior was also analyzed.The results show that the particle size of PAM-AMPS/Fe3O4 nano drag reducing agent is 100-500 nm,and the viscosity-average molecular weight is 4.99 X 106 g/mol.At 30 ℃,PAM-AMPS/Fe3 O4 drag reducing agent exhibits significant shear dilution characteristics when the shear rate is greater than 0.3 s-1.The drag reducing agent has a more complex microstructure,and its supercritical mass fraction is 0.035％.Compared with the blank polymer,it shows better viscosity enhancing ability and viscoelasticity behavior.As AMPS contains temperature and salt-tolerant groups,when the mass fraction of NaCl and CaCl2 is 10％and 5％,the viscosity retention rates of PAM-AMPS/Fe3O4 drag reducing agent can reach 69％and 53％respectively,showing a strong salt tolerance.Meanwhile,the viscosity recovery rates of the drag reducing agent after shearing for 3600 s and 7200 s at a shear rate of 1000 s-1 can reach 100％and 94％,respectively,demonstrating a good shear resistance.
关键词
减阻剂/聚丙烯酰胺/纳米Fe3O4/黏弹性流体/耐盐性/耐剪切性/流变行为Key words
drag reducing agent/polyacrylamide/nano Fe3O4/viscoelastic fluid/salt tolerance/shear resistance/rheological behavior引用本文复制引用
基金项目
国家自然科学基金项目(52174027)
西安石油大学研究生创新与实践能力培养计划项目(YCS22213046)
出版年
2024
NETL
NSTL
万方数据