驱油用聚丙烯酰胺溶液的界面扩张流变特征研究  

Dilational rheological properties of polyacrylamide solutions at interfaces

作　　者：曹绪龙[1] 李阳[1] 蒋生祥[2] 孙焕泉[1] 窦立霞[1] 

机构地区：[1]中石化胜利油田有限公司地质科学研究院,山东东营257015 [2]中国科学院兰州化学物理研究所,甘肃兰州730000

出　　处：《石油大学学报（自然科学版）》2005年第2期70-72,共3页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：国家'973'资助项目(G1999022506)

摘　　要：借助界面扩张流变测量方法,研究了聚合物与正十二烷形成的界面膜特征。主要探讨了液膜稳定过程与界面扩张粘弹模量随测量时间变化的关系、聚合物溶液浓度的影响以及不同聚合物、不同界面膜的流变特征。结果表明,界面粘弹模量的变化反映了膜的吸附平衡过程;正十二烷/聚合物体系膜强度以弹性为主,只是随聚合物浓度增加,粘性模量对膜强度的贡献比例有所上升。聚合物溶液与不同物质所形成的界面具有不同的粘弹性特征,与空气、正十二烷、原油所形成界面的界面扩张粘弹模量E的大小次序为E空气>E正十二烷>E原油,即E随着两相密度差的减小而减小。The changes of interfacial viscoelasticity along with measuring time and the effect of partially hydrolyzed polyacrylamide(PHPAM) concentration and type viscoelasticity at the interface between PHPAM and dodecane were investigated by means of dilational method. The results show that response of interfacial adsorption process can be made by interfacial viscoelasticity. Elasticity plays an important role for PHPAM/dodcane system even though contribution of viscosity in viscoelasticity goes up along with the increase of PHPAM concentration. Moreover, different viscoelasticity characteristics at different interfaces for PHPAM solution were also found. Among those three interfaces were experimented, and the order of the numerical value of viscoelasticity from large to small is PHPAM/air interface, PHPAM/dodecane interface and PHPAM/crude oil interface.

关 键 词：聚丙烯酰胺溶液 扩张 特征研究 正十二烷 油用 聚合物体系 聚合物溶液 测量方法 时间变化 稳定过程 溶液浓度 流变特征 平衡过程 浓度增加 弹性特征 界面膜 膜强度 模量 粘弹 密度差 空气 原油 减小 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TQ921.7[轻工技术与工程—发酵工程]