Water production from oil and gas wells is an increasing problem for the oil industry. Many solutions to the problem have been proposed and some techniques have been successfully introduced into operations. These successful techniques generally require well interventions to isolate target zones and to place the treatments. However, the associated costs may inhibit the treatments from being economic. A bullhead type chemical treatment that selectively reduces water production appears to be a more attractive alternative. These systems are known as relative permeability modifiers.

This paper focuses on relative permeability modifiers from a reservoir and production engineering perspective. The concepts behind relative permeability and its effect on hydrocarbon production and recovery are briefly discussed. Existing experimental data and history matching were used to obtain relative and modified relative permeability curves. Subsequently, these relative permeability curves were used to identify conditions where relative permeability modifiers can be used with potential for success.

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