摘要
采用常规实验评价和分子动力学模拟方法,研究了活性功能聚丙烯酰胺(A-HPAM)与部分水解聚丙烯酰胺(HPAM)在不同温度和矿化度下的溶液性质,通过可视化实验明确运移规律,从原子分子水平探讨增黏及驱油机理。实验结果表明,A-HPAM溶液在一定的温度和矿化度范围内有温增黏和盐增黏趋势,可大幅降低油水界面张力,分散原油的能力强,驱油效率相比HPAM更高。A-HPAM疏水基团相互缔合是热增黏的关键因素。A-HPAM上磺酸基团使其受盐离子影响小,在高矿化度下黏度更高。疏水基团可增强A-HPAM与油相的相互作用,降低界面张力。同时,A-HPAM分子在孔道内形成的空间网络结构,使原油随驱替液稳定移动,提高驱替效率。
The solution properties of active functional partially hydrolyzed polyacrylamide(A-HPAM)and partially hydrolyzed polyacrylamide(HPAM)under different temperatures and salinities were investigated by conventional experimental evaluation and molecular dynamics simulation.Visualization experiments were utilized to clarify the migration law,and the polymer viscosity-increasing and oildisplacement mechanisms were discussed based on the atomic and molecular levels.The experimental results show that the A-HPAM solution exhibits a trend of viscosity increase with temperature and salt within a certain range of temperature and salinity.It effectively reduces the interfacial tension between oil and water,with a pronounced capacity for crude oil dispersion and higher oil displacement efficiency compared to HPAM.The mutual association of hydrophobic groups of A-HPAM is the key factor for viscosity increasing with temperature.The sulfonic acid group of A-HPAM makes it less affected by salt ions,thus the viscosity is higher at high salinity.The hydrophobic groups can enhance the interaction between A-HPAM and the oil phase and reduce the interfacial tension.In addition,the spatial network structure is formed by A-HPAM molecules in the pore channels,which enables crude oil to move steadily with the displacement fluid and improves displacement efficiency.
作者
李雅婧
伊卓
胡晓娜
刘希
张瑞琪
范荣
LI Yajing;YI Zhuo;HU Xiaona;LIU Xi;ZHANG Ruiqi;FAN Rong(Sinopec(Beijing)Research Institute of Chemical Industry Co.,Ltd.,Beijing 100013,China)
出处
《石油化工》
北大核心
2025年第4期495-501,共7页
Petrochemical Technology
关键词
活性功能聚丙烯酰胺
分子动力学模拟
可视化
增黏
active functional partially hydrolyzed polyacrylamide
molecular dynamics simulation
visualization
viscosity-increasing
