摘要
为了保证酚醛树脂堵剂的注入性和封堵效果,设计了将热塑性的树脂预聚体注入地层后在地层中再固化而形成连续的高强度树脂封堵带的段塞封堵材料工艺。水溶性酚醛树脂固化效果是封堵剂能否成功的关键。利用红外光谱与DSC,测定酚醛树脂固化过程分子结构变化趋势,获得了树脂预聚体固化机理,结果表明,树脂预聚体固化后形成的羟基缔合结构是树脂具有高强度的主要原因,随着温度升高,当温度达到70℃后,固化时间7 h以后,酚醛树脂完全固化后,3414.5 cm^-1处发现了缔合羟基峰,在1400 cm^-1出现对-对位连接方式产生的亚甲基桥吸收峰,出现了酚醛树脂固化后网状缔合结构,使得酚醛树脂材料具有较高强度。
In order to ensure the injectability and plugging effect of the phenolic resin plugging agent,a slug plugging material process is designed in which a thermoplastic resin prepolymer is injected into the formation and then solidified in the formation to form a continuous high-strength resin plugging zone.The curing effect of water-soluble phenolic resin is the key to the success of the blocking agent.Using infrared spectroscopy and DSC,the molecular structure change trend of the phenolic resin curing process was measured,and the curing mechanism of the resin prepolymer was obtained.The results show that the hydroxyl association structure formed after the resin prepolymer is cured of the main reason for the high strength of the resin.As the temperature rises,when the temperature reaches 70℃,and the curing time is 7 h,after the phenolic resin is completely cured,the associative hydroxyl peak is found at 3414.5 cm-1,which appears at 1400 cm-1 due to the para-to-position connection.The absorption peak of the methylene bridge appears in the network association structure after the phenolic resin is cured,which makes the phenolic resin material have higher strength.
作者
陈世军
陈鹏
刘标
程占全
穆凯
CHEN Shi-jun;CHEN Peng;LIU Biao;CHENG Zhan-quan;MU Kai(College of Chemistry and Chemical Engineering,Xi’an Shiyou University,Xi’an 710065,China;PetroChina Yumen Oilfield Huanqing Branch,Jiuquan 735000,China;The Seventh Oil Production Plant,Changqing Oileld Co.of PetroChina,Xi’an 710200,China)
出处
《应用化工》
CAS
CSCD
北大核心
2021年第1期19-22,共4页
Applied Chemical Industry
基金
国家科学自然基金项目(21763030)。
关键词
油井堵水
酚醛树脂
固化机理
羟基缔合
oil well plugging
phenolic resin
curing mechanism
hydroxyl association
