超高强度凝胶氧化破胶降解动力学研究  

Degradation Kinetics of Ultra-High-Strength Gel by Oxidative Gel Breakage

作　　者：贾虎[1] 李仲国 聂一凡 李志杰[2] 余维初[3] JIA Hu;LI Zhongguo;NIE Yifan;LI Zhijie;YU Weichu(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University),Chengdu,Sichuan,610500,China;PetroChina Tarim Oilfield Company,Korla,Xinjiang,841000,China;College of Chemistry&Environmental Engineering,Yangtze University,Jingzhou,Hubei,434023,China)

机构地区：[1]油气藏地质及开发工程全国重点实验室(西南石油大学),四川成都610500 [2]中国石油塔里木油田分公司,新疆库尔勒841000 [3]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《石油钻探技术》2025年第2期107-115,共9页Petroleum Drilling Techniques

基　　金：四川省自然科学基金重点项目“基于机器学习分子设计的分离膜增稠C O 2无水控水压裂液体系构筑”(编号:2025ZNSFSC0029);霍英东教育基金会第十七届高等院校青年教师基金项目“离子液体纳米复合凝胶的构筑及堵水堵漏机理研究”(编号:171043)联合资助。

摘　　要：为明确单体聚合类凝胶在暂堵作业结束后的氧化破胶降解机理,开展了凝胶氧化破胶降解动力学研究。运用Horowitz-Metzger、Coats-Redfern和Flynn-Wall-Ozawa模型,计算得到超高强度凝胶(USGel)降解动力学参数,对比分析得到适合USGel的降解动力学模型;结合扫描电镜、傅里叶红外光谱分析等实验,揭示了破胶剂破碎降解USGel的机理,并得到低温、中温、高温修正后的降解预测模型。研究结果表明,该模型适用于预测USGel中高温降解时间;根据凝胶降解机理,破胶剂逐步消耗USGel酰胺基团的氨基(—NH_(2))和羧酸基团的羟基(—OH)等化学键,聚合物分子链逐步断裂,最终USGel破碎变成液体。研究结果为改进油气井暂堵破胶技术提供了理论依据。To clarify the degradation mechanism of monomer-polymerized gels by oxidative gel breakage at the end of temporary plugging operations,a degradation kinetics study on the oxidative breakage of gels was carried out.The Horowitz-Metzger,Coats-Redfern,and Flynn-Wall-Ozawa models were used,and the degradation kinetics parameters of ultra-high-strength gel(USGel)were calculated.The degradation kinetics model suitable for USGel was obtained by comparative analysis.By combining with the scanning electron microscope,Fourier infrared spectroscopy analysis,and other experiments,the degradation and breakage mechanism of USGel by gel breakers were revealed,and the modified degradation prediction models for low,medium,and high temperatures were obtained.The results show that the models are suitable for predicting the degradation time of USGel at medium and high temperatures.According to the gel degradation mechanism,the gel breaker gradually consumes the chemical bonds such as the amino group(−NH_(2))of the USGel amide group and the hydroxyl group(−OH)of the carboxylic acid group,and the polymer molecular chain is gradually broken.Finally,the USGel is broken into liquid.The results provide a theoretical basis for the improvement of the temporary plugging and gel breakage technology of oil and gas wells.

关 键 词：降解动力学 降解预测 降解机理 氧化破胶 凝胶 

分 类 号：TE358[石油与天然气工程—油气田开发工程]