Applicability of geothermal inflow performance reference curves to CO2-bearing reservoirs

Vogelʹs hugely successful Inflow Performance Reference curve (IPR) has been used for many years by the petroleum industry to estimate well deliverabilities. In 1990 we developed the first Geothermal Inflow Performance Reference curves (GIPRs), for two-phase inflow of pure water. Recently we followed up with a revised set of GIPRs for pure water and a second set that accounts for effects of CO2 on the deliverability of geothermal reservoirs. These curves relate (a) dimensionless mass flowrate with dimensionless flowing pressure and (b) dimensionless thermal power with dimensionless flowrate, both at the feedpoint. In this work we explore the applicability of the reference curve (a) to data from a CO2-bearing geothermal reservoir. We find that there is excellent agreement between predicted and observed inflow performance in this case. These results suggest that our curve (a) should also be applicable to other CO2- bearing geothermal reservoirs. © 1998 CNR. Published by Elsevier Science Ltd.