الفهرس 
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Abstract
A two-phase, two-dimensional mathematical model was developed to simulate the process of enhanced oil recovery by polymer flooding. The model involves four components (oil, water, polymer and salt) with .Hl:;orption, dispersion, permeability reduction, by-passing, salinity and heterogeniety effects. This model was solved using implicit finite difference representation of the continuity equation representing the component mass conservation. An iterative solution procedure using M-tridiagonal algorithm- method is employed. The developed simulator was used to investigate the effect of some factors that influence on the process of polymer flooding such as polymer concentration, adsorption, permeability reduction, salinity, and formation heterogeniety.
Results of this study indicate that, more oil can be obtained by using polymer solutions than would be expected from waterflooding. Also it was found that, oil recovery is sensitive to variations in polymer slug size, polymer concentration, polymer adsorption and brine salinity. Polymer adsorption was found to be slightly higher for higher polymer concentration and higher brine salinity. Reduction in salinity greatly increased the viscosity of the polymer solution. It was found also that permeability reduction decreases with increasing formation permeability and increases with increasing oil saturation.
Results of this study also show that cumulative oil production by polymer flooding process increases with decreasing permeability contrast between horizontal and vertical permeability. The models predicted that the earlier the implemented polymer flood in a waterflood, the larger the incremental oil recovery at the same pore volume injected.