Abstract

Abstract An analytical recovery model derived theoretically based on fluid flow mechanisms was applied to predict the production and the recovery by spontaneous water imbibition in gas-water-rock systems. Capillary pressure and relative permeability were included in this recovery model. It was demonstrated that the model prediction data were very close to the experimental data. When all of the fluid and rock properties are available, the analytical recovery model could also predict the production and recovery satisfactorily. Also studied were the effects of permeability, fluid property, relative permeability, and capillary pressure on the recovery by spontaneous water imbibition into gas-saturated rocks.

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