Abstract

A geothermal reservoir simulator has been employed in a series of calculations which describe the response of geothermal reservoirs to fluid production/injection from a single well. The numerical solutions were analyzed to generate interpretation techniques for pressure transient data from either single-phase or two-phase geothermal reservoirs. The investigations include (1) the drawdown/buildup response of hot water wells, (2) the drawdown/buildup behavior of initially two-phase (liquid water/steam) reservoirs, (3) the drawdown/buildup response of initially single-phase reservoirs which undergo flashing as a result of fluid production and (4) the effect of cold water injection into single-phase and two-phase reservoirs.

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