Combining the effects of polymer retention and degradation

This example is presented here to illustrate an approach to project design, as it relates to two very important factors in polymer flooding—retention and degradation. However, note that this is only appropriate when relatively cheap calculation can be carried out in which the basic recovery mechanism is captured (cross-flow in this case). The approach should be used to determine ball park figures for these quantities at an early stage in the polymer flood assessment. However, some points should be kept in mind  

Issues of this type are considered again in Chapter 9, in which the steps in the design of a field polymer flood are discussed. 

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