Study On Polymer-lfooding Reservoir Remaining Oil Distribution And Log Interpretation Model Screening

As the development of Daqing oilfield and growing of inundated level, the application ofpolymers displacement is a logical choice for enhancing the displacement efficiency. However,many scholars find that reservoir stratum appears logging response which is different asregular flood when the polymer is impregnated; furthermore, due to the viscosity of polymerssolution, the pore structure of polymer-flooding reservoir stratum and the microscopicremaining oil distribution produce a change.The paper selects a conducting model which is more suitable for polymers displacereservoir stratum, the selection focuses on the characteristics of polymer-flooding reservoirstratum and also bases on the experiments of polymers solution conduction regular and theexperiments of polymers displace the electric petro-physical experiment; with the method ofstudy on the rock resistivity changing regular of impregnate different polymers and themineralizing solutions. This paper analyses the regular of polymer-flooding Archie Model,also accurately analysis the dual-water model using the experimental data of electricpetro-physical experiment. Besides, on the basis of physical properties research of coresample, an interpretation model is built which links with actual logging regular; theparameters of interpretation model are polymer-flooding reservoir stratum porosity,permeability, irreducible water saturation and shaliness index. At last, to examine andcompare the actual application result of the interpretation models which are selected earlier byusing the core analysis data. The comparison shows that the selections of the interpretationmodels which aim at interpret the actual data are conform to practice, and the selections arecompetent for precisely pointing out the remaining oil distribution of single-well.