氨基离子液体聚合物抗高温抑制剂的作用机理  

Application of Polymer Based on Amino Ionic Liquid as Anti-high Temperature Inhibitor and the Mechanism

作　　者：任妍君 陈欢[3] 杨弘 REN Yanjun;CHEN Huan;YANG Hong(Petroleum Engineering School,Southwest Petroleum University,Chengdu,Sichuan 610500;National Engineering Research Center of Oil&Gas Drilling and Completion Technology,Chengdu,Sichuan 610500;Daqing Oilfield Limited Company,Daqing,Heilongjiang 163000)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]油气钻完井技术国家工程研究中心,成都610500 [3]大庆油田有限责任公司,黑龙江大庆163000

出　　处：《钻井液与完井液》2023年第3期289-295,302,共8页Drilling Fluid & Completion Fluid

基　　金：中国石油-西南石油大学创新联合体科技合作项目子课题“深井复杂地层井下复杂情况预防及对策研究”(2020CX040102)。

摘　　要：为解决高温地层黏土水化所引起的井壁失稳问题,合成了含双键和氨基的离子液体单体,并将其与丙烯酰胺共聚得到了一种聚合物抑制剂PAN。采用傅里叶变换红外光谱仪对PAN的分子结构进行了表征,并通过浸泡膨胀和搅拌分散、线性膨胀、热滚回收实验评价其抑制性能。结果表明:PAN抑制黏土膨胀与分散的性能优于常用抑制剂KCl、聚醚胺D230及离子液体单体,并且抗温达250℃。通过XRD、Zeta电位、润湿性分析了PAN的抑制机理。PAN通过缠绕包覆在黏土颗粒上、压缩双电层、增加黏土颗粒间胶结性及颗粒表面疏水性而起到抑制作用,为新型抗高温强效抑制剂的研发提供理论与技术支持。A copolymer(PAN)base on amino ionic liquid and acrylamide were synthesized and used as the inhibitors for inhibiting clay hydration under high temperature condition.The molecular structure of PAN was characterized using infrared spectroscopy.The inhibition properties of PAN were evaluated by immersion and dispersion tests,linear expansion and hot roll recovery experiments.The results showed that PAN performed better than KCl,polyether amine D230 and ionic liquid monomers in inhibiting swelling and dispersion,which could also resist high temperatures of 250℃.The inhibition mechanism was revealed by XRD,Zeta potential,wettability analysis.PAN exerted excellent inhibition effects by winding and coating the clay particles,increasing the cementation between clay particles,compressing the double electric layers and changing the wettability.The results could provide theoretical and technical supports for the development of novel inhibitors with superior inhibition property and high temperature resistance.

关 键 词：氨基离子液体 共聚物 黏土水化 页岩抑制剂 井眼稳定 

分 类 号：TE254.4[石油与天然气工程—油气井工程]