石油化工高等学校学报2026，Vol.39Issue(3)：58-63,6.DOI:10.12422/j.issn.1006-396X.2026.03.007
CO2驱防窜封堵用弱凝胶体系探究及应用
Exploration and Application of Weak Gel System for Channeling Control and Plugging in CO₂ Flooding
摘要
Abstract
Conventional polymers fail to meet the requirements for channeling control and plugging under high temperature and high salinity conditions,creating an urgent demand for more durable materials.Two acrylamide-based preformed particle gels(PPGs):polyelectrolyte-based(DJZ-1)and polyzwitterionic-type(LXLZ-2)were synthesized for enhancing CO2 plugging efficiency.The swelling behavior of the gel was analyzed under different temperature,salinity and pH conditions using Ritger-Peppas and Yavari-Azizian models.The results indicate that the swelling degrees of DJZ-1 and LXLZ-2 in water are 56 and 18 respectively.With the rise of ionic strength,the swelling degree of DJZ-1 declines remarkably,whereas that of LXLZ-2 stays nearly constant.Changes in pH value only elevate the swelling degree of DJZ-1 and have no impact on LXLZ-2.LXLZ-1 can maintain long-term thermal stability under reservoir conditions at 120℃,and both systems can effectively exert the performance of PPG weak gel systems.关键词
防窜封堵/凝胶/聚合物/驱替/耐温/耐盐Key words
Channeling control and plugging/Gels/Polymers/Flooding/Temperature resistant/Salt resistant分类
化学化工引用本文复制引用
徐涛..CO2驱防窜封堵用弱凝胶体系探究及应用[J].石油化工高等学校学报,2026,39(3):58-63,6.基金项目
国家自然科学基金项目(52404042) （52404042）
江汉油田分公司盐间页岩油有效动用项目(JKKBF0625002). （JKKBF0625002）
