New Methods of Quantitatively Evaluate Effect of Profile Control

To quantitatively describe the effect of injection profile control of wells,we presented three new methods,which could be used to quantitatively evaluate heterogeneous degree of profile control measures,through defining coefficient of variation of profile control wells,homogeneous coefficient of injection profile,uneven coefficient of the Lorenz curve before and after profile control.Results calculated from those methods are reasonable in the application in Beisantai Oilfield.We can directly see the improvement degree of heterogeneity of water injection profile after profile control,and accurately learn about the effective information of profile control measures from the quantitative evaluation indexes.This proved that the method is practical and convenient,and can meet the requirement of field application.So it demonstrated that the method using formula and Lorenz curve to quantitatively evaluate profile effect is feasible and instructive for profile control in water injection wells.