Conductive Characteristics Of Water-Drive Shaly Sand And Reaserch On The Applicability Of Archie Formula

With the exploration of oilfield and the increasing of waterflooding,the well logginginterpretation of water flooded layer becoming more and more difficult.How to evolve theresearch work of distributing regulation of oil remaining According to the trait of stage ofhigh water cut stage,will become important factors which restrict oilfield stable productionand development.Therefore it is necessary to evolve quantitative interpretation researchingwork of water flooded layer according to the actual situation of the middle stage of oilexploitation.This article applic core of different porosity and permeability to proceed theelectric experiment of waterflooding,establish the relationship between formation factor F andthe porosity,identify the value of a and m value of research area,meanwhile establish therelationship between resistivity index I and water content Sw,identify the value of b and nvalue,researching the applicability of Archie formula.Based on the research of loggingresponse characteristics of reservoir and conductive mechanism in the condition of waterflooding,applicating the Archie formula established the resistivity interpretation model of oillayer and water flooded layer.Analysised the affecting factors of the model,and usingexperimental data of rock sample resistivity to analysis the accuracy of resistivitymodel.Researched the accuracy of using Archie model to resolute remainder oil saturation.,theresult shows that the accuracy of Archie model isn’t so high, thus amended the model, theresult shows that applicating the corrected Archie model for the calculation of watersaturation is reasonable,It can improve the accuracy of interpretation of water floodedlayer,realization the quantity interpretation of water-flooded layer.