Reservoir screening criteria for polymer flooding

The two principal reasons for having screening rules for polymer flooding are  

The main conditions and selection criteria listed in Table 9.1 are discussed in turn below  

Screening criterion Heterogeneity Viscosity control control polymer polymer flood flood Comment 

Oil viscosity Usually Usually 5cP /Zo 30cP 0.4cP /io lOcP Max. 70 cP Max. 20 cP Symptom in both cases is early water breakthrough and low sweep efficiency 

Absolute permeability Min. approx. 20 md No max. To avoid excessive polymer retention 

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Table 9.1. Summary of reservoir screening criteria for polymer flood application.

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