HPAM/PPG颗粒悬浮液驱油体系增黏机制的分子模拟  

Molecular simulation of viscosity-increasing mechanism for polymer/PPG particle suspension flooding system

作　　者：姜祖明 石静 元福卿 祁凯 郝喜顺 李振 燕友果 JIANG Zuming;SHI Jing;YUAN Fuqing;QI Kai;HAO Xishun;LI Zhen;YAN Youguo(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying 257015,China;School of Materials Science and Engineering in China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东东营257015 [2]中国石油大学(华东)材料科学与工程学院,山东青岛266580

出　　处：《中国石油大学学报（自然科学版）》2023年第3期190-196,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(U21B2070);中国石化优秀青年创新基金项目(P19006)。

摘　　要：采用分子动力学模拟方法从原子分子层次考察聚合物HPAM/PPG(聚丙烯酰胺/聚丙二醇)颗粒悬浮液驱油体系的增黏性质。结果表明:当溶液中聚合物HPAM和PPG颗粒总的质量浓度相同的情况下,聚合物HPAM质量浓度占比增加时,体系提供更高的黏度;聚合物HPAM具有更大的回转半径,形成更多的交联,从而提供更高的结构黏度;较强的相互作用有利于形成稳定的水化层,实现水动力学增黏;—COO-形成的水化层中水分子数量更多,更容易形成水化层且形成的水层更稳定,对水动力学黏度的贡献更大;聚合物HPAM的亲水基团对水动力学黏度的贡献大于PPG颗粒亲水基团的贡献。The viscosity-increasing properties of the polymer HPAM/PPG particle suspension flooding system were investigated from the atomic and molecular level using molecular dynamics simulation.It is found that under same total mass concentration,the system could rovide higher viscosity when the mass concentration of polymer HPAM increases.Polymer HPAM has a larger gyration radius and form more crosslinking,which results in higher spatial viscosity.The hydrodynamic viscosity-increasing could be achieved from the strong interaction between polymer and water phase.There are more water molecules in the hydration layer formed by—COO-,which is easier to form form hydration layer and more stable.And this contributes more to the hydrodynamic viscosity.The contribution of hydrophilic groups of polymer HPAM to hydrodynamic viscosity is greater than that of PPG particles.

关 键 词：聚合物 PPG颗粒 悬浮液驱油体系 黏度 分子动力学模拟 

分 类 号：TE19[石油与天然气工程—油气勘探]