石油化工2025，Vol.54Issue(5)：663-669,7.DOI:10.3969/j.issn.1000-8144.2025.05.008
外部因素对微胶囊聚合物驱油剂破壳释放的影响
Influence of external factors on shell-breaking release of microcapsule polymer-based oil displacement agents
摘要
Abstract
The effects of temperature,mineralization degree,high-valent metal ions,acidity and alkalinity,reducing ions,and surfactants on the shell-breaking release of microcapsule polymer-based oil displacement agents were analyzed.The research results indicate that a higher temperature indicates a greater shell-breaking release rate of microcapsule polymers.At 85℃,after 7 d of aging,the apparent viscosity of the microcapsule polymer-based oil displacement agents reaches a maximum of 49.5 mPa·s.The shell-breaking release of microcapsule polymers is inhibited by mineralization degree and reducing ions,and a higher mineralization degree and greater concentration of reducing ions lead to a more pronounced inhibition effect.The high-valent metal ion Ca2+has a stronger compression effect on the electric double layer.Moreover,Ca2+is easy to bind to the carboxyl group produced by the hydrolysis of the amide group so that the apparent viscosity of the oil displacement agent system decreases rapidly.At higher pH(pH=12,13).The apparent viscosity of the oil displacement agent system is decreased.Under the condition of 0.4%(w)surfactant content,the apparent viscosity of the oil displacement agent system after 7 d of aging is greater than 40 mPa·s,and the hydrogen bond network formed by oxygen atoms in non-ionic groups and water molecules is more dense,resulting in an increase in the apparent viscosity of the system.关键词
微胶囊聚合物/矿化度/还原性离子Key words
microcapsule polymer/mineralization degree/reducing ion分类
石油、天然气工程引用本文复制引用
元福卿,李德庆,徐辉,巩锦程..外部因素对微胶囊聚合物驱油剂破壳释放的影响[J].石油化工,2025,54(5):663-669,7.基金项目
国家自然科学基金联合基金重点项目(U21B2070). （U21B2070）
