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Thermo-Hydraulic Evolution of the Alfredo Mainieri Protti Geothermal Field (Miravalles, Costa Rica) Between 2014–2024
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Third EAGE Workshop on Geothermal Energy, Nov 2025, Volume 2025, p.1 - 5
Abstract
Summary
The Miravalles geothermal field (Alfredo Mainieri Protti geothermal field, CGAMP), Costa Rica. It is the first geothermal field in operation in the country, with five generating units: Miravalles I, Miravalles II, Miravalles III, Miravalles V (binary cycle), and a backpressure unit. This is an update for the 2014–2024 period on the evolution of the thermo-hydraulic parameters at CGAMP as part of the sustained monitoring of variables such as head pressure, dynamic temperature, produced and reinjected mass flows, enthalpy, and pressure drop. After 30 years of continuous exploitation, the field shows a natural decline in its evolution, possibly due to natural depletion of the reservoir. However, the definition and implementation of reservoir management policies (production-reinjection) has allowed the sustainable exploitation of the wells, achieved the stabilization of the reservoir parameters, and met the energy commitment to meet the demand of the National Energy System. As part of the strategy to maintain long-term production, drilling of 5 replacement wells will begin in 2026, and a new numerical model is currently being prepared, including additional sectors of the reservoir with the estimation of several production scenarios.
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