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本文着重介绍了在实验测定聚合物溶液残余阻力系数(FRR)时所发现的一种特殊现象——FRR的时间相关性。可以认为这是滞留在多孔介质中聚合物分子当注入水流速变化时产生的附加残余效应。本文定义了附加残余效应系数(F_(ARE))。根据部分水解聚丙烯酰胺(HPAM)水溶液在力场作用下分子构象的变化,分析了粘弹性可能是产生附加残余效应的根本原因;岩心渗透率是影响F_(ARE)的一种因素。作者认为存在着利用这种效应进一步改善流度控制的可能性。
This article highlights the time dependence of FRR, a special phenomenon found experimentally in determining the residual drag coefficient (FRR) of a polymer solution. This can be considered as an additional residual effect of polymer molecules trapped in the porous medium as the flow rate of injected water changes. This paper defines the additive residual effect coefficient (F_ (ARE)). According to the molecular conformational changes of partially hydrolyzed polyacrylamide (HPAM) aqueous solution under the action of force field, it is analyzed that viscoelasticity may be the root cause of additional residual effect. Core permeability is a factor affecting F_ (ARE). The author believes there is a possibility of using this effect to further improve flow control.