油气地质与采收率2026，Vol.33Issue(2)：171-181,11.DOI:10.13673/j.pgre.202504016
功能化部分水解聚丙烯酰胺的性能及提高采收率研究
Research on performance of functionalized partially hydrolyzed polyacrylamide and its enhanced oil recovery
摘要
Abstract
Partially hydrolyzed polyacrylamide(HPAM)used in chemical flooding has poor temperature and salt resistance,insufficient viscosity stability,and loss of oil displacement efficiency due to self-polymerization deposition.To address this issue,the size effect and unique interface characteristics of nanomaterials were combined with traditional polymers,and the drawbacks of polymer flooding can be overcome,thereby enhancing the oil displacement performance of polymer-based fluid flooding.This paper used the low-cost citric acid and urea as raw materials and leveraged their abundant hydrophilic groups and nucleophilic heteroatoms to prevent the curling of HPAM molecular chains through hydrogen bonding,thereby stabilizing its linear structure.Additionally,the water-soluble zinc chloride was combining with the carboxyl groups of HPAM creating steric hindrance,while the cationic nature of zinc ions enhanced the salt tolerance of HPAM.By using a one-step hydrothermal method,the raw materials underwent carbonization treatment to form a nano-modifier.Then,through the physical action of electrostatic neutralization,the nano-modifier was combined with the HPAM molecules to obtain the modified HPAM.The results show that,compared with the unmodified HPAM,when the mineralization degree is 1×104 mg/L,the viscosity retention rate of the modified HPAM with a mass fraction of 0.5%increases by 54%at a shear rate of 0.1-100 s-1,and the viscosity retention rate increases by 26%.The oil-water interfacial tension is reduced to as low as 0.16 mN/m.By changing the wetting angle of the core and crude oil from a neutral wetting angle of 97° to a hydrophilic wetting angle of 34°,the oil repellency of the rock was significantly enhanced;under different polymer concentrations,core permeability,and oil type conditions,the modified HPAM flooding achieved a further increase in crude oil recovery rate of 7.36%-8.98%compared to the unmodified HPAM flooding.The modified HPAM system not only overcame its inherent deficiencies but also significantly improved the viscosity of polymer solution,oil-water interfacial tension,and rock wettability,promoting the innovation and development of polymer flooding-based oil recovery technology.关键词
部分水解聚丙烯酰胺/功能化改性/纳米材料/稳定黏度/提高采收率Key words
partially hydrolyzed polyacrylamide/functionalized modification/nanomaterial/stable viscosity/enhanced oil recovery分类
能源科技引用本文复制引用
李昌升,赵宇,王以臣,王伟琳,王春生,赵昌明,王庆国,施伟光..功能化部分水解聚丙烯酰胺的性能及提高采收率研究[J].油气地质与采收率,2026,33(2):171-181,11.基金项目
中国石化胜利油田科技专项"稠油原位改质技术提高太平油田开发效果研究"(10202801-24-ZC0613-0006),中国石油天然气股份有限公司科技专项"低成本高效智能工程技术研究"(2023ZZ22-05). （10202801-24-ZC0613-0006）
