The Injecting Parameters Of Equal-mobility Displacement Study Of High Water Cut Oilfield After Polymer Flooding

With the improving development of the EOR techniques,the polymer-flooding technology has been widely put into use.While we have found that quite a bit of blocks are of little or even unused after the polymer-flooding solution,and the polymer solution formed several channels of high permeability when washing oil in the layers,leading to the invalid flooding and circulation which has made an enormous waste,that means that the polymer flooding technology can't get effective application in the low-permeability layers of the reservoir of heterogeneity,and this made the waste of resource.In this article we will focus on how to increase the degree of the use and then realize the EOR purpose on the low permeability blocks of the heterogeneity reservoir of high water cut after the polymer flooding.To put forward an EOR scheme,we designed a series of plans of the physical experiments to study how the poly-surfactant works under different circumstances in the equal-mobility way.In the plan of the experiments,we use the Haibo-III poly-surfactant to displace the core under the circumstances of different concentration,different injection pressures.What is more,we established numerical models on the base of physical experiments,tested and verified the results of the physical experiments,in order to offer support to the numerical modeling works when projecting the equal-mobility flooding scheme.