Well Characteristics Based on Relative Permeabilities at Feed Points.

概要

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A simple mathematical model that is a wellbore model coupled with steady radial flow in a reservoir is developed for two-phase geothermal fluid with excess enthalpy. Relative Permeabilities at wellbore feed points are applied on the model. Geothermal fluid with excess enthalpy is discharged from liquid dominated reservoir owing to the effect of relative permeabilities under some paticular conditions. Discharged vapor flowrate in case of two-phase flow in a reservoir owing to reservoir flash is sometimes less than that in case of wellbore flash. The shut-in pressure of well which discharges a geothermal fluid with excess enthalpy is much higher than that of a well which discharges a fluid with non-excess enthalpy. The result of this study shows that a deeper and larger diameter well with multi feed points proves to be a high productivity and economical well to develop the geothermal energy.
日本地熱学会の論文