Miravalles Geothermal Area

From Open Energy Information

Area Overview

Geothermal Area Profile

Location: Guanacaste Province, Costa Rica

Exploration Region: Central American Volcanic Arc Chain

GEA Development Phase: Operational
"Operational" is not in the list of possible values (Phase I - Resource Procurement and Identification, Phase II - Resource Exploration and Confirmation, Phase III - Permitting and Initial Development, Phase IV - Resource Production and Power Plant Construction) for this property.

Coordinates: 10.6992°, -85.1942°

Resource Estimate

Mean Reservoir Temp: 240°C
513.15 K
464 °F
923.67 °R

Estimated Reservoir Volume: 15
15 m³
1.5e-8 km³
3.598691e-9 mi³
529.72 ft³
19.619 yd³

Mean Capacity: 165 MW
165,000 kW
165,000,000 W
165,000,000,000 mW
0.165 GW
1.65e-4 TW

USGS Mean Reservoir Temp:

USGS Estimated Reservoir Volume:

USGS Mean Capacity:

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History and Infrastructure

Operating Power Plants: 4

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Developing Power Projects: 1

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Power Production Profile

Gross Production Capacity: 142 MW
142,000 kW
142,000,000 W
142,000,000,000 mW
0.142 GW
1.42e-4 TW

Net Production Capacity:

Owners  :
  • Instituto Costaricense de Electricidad
  • Instituto Costarricence de Electricidad

Power Purchasers :
  • Ormat

Other Uses:

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Regulatory and Environmental Issues

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Exploration History

First Discovery Well

Completion Date:

Well Name:



Initial Flow Rate:

Flow Test Comment:

Initial Temperature:

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Well Field Description

Well Field Information

Development Area:

Number of Production Wells:

Number of Injection Wells:

Number of Replacement Wells:

Average Temperature of Geofluid: 320 240°C
513.15 K
464 °F
923.67 °R

Sanyal Classification (Wellhead):

Reservoir Temp (Geothermometry):

Reservoir Temp (Measured):

Sanyal Classification (Reservoir):

Depth to Top of Reservoir: 700 m
0.7 km
0.435 mi
2,296.588 ft
765.527 yd

Depth to Bottom of Reservoir: 1700 m
1.7 km
1.056 mi
5,577.428 ft
1,859.137 yd

Average Depth to Reservoir:

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Geology of the Area

Geologic Setting

Tectonic Setting: Subduction Zone

Controlling Structure:

Topographic Features:

Brophy Model: Type B: Andesitic Volcanic Resource

Moeck-Beardsmore Play Type: CV-1a: Magmatic - Extrusive, CV-1b: Magmatic - Intrusive
"CV-1a: Magmatic - Extrusive, CV-1b: Magmatic - Intrusive" is not in the list of possible values (CV-1a: Magmatic - Extrusive, CV-1b: Magmatic - Intrusive, CV-2a: Plutonic - Recent or Active Volcanism, CV-2b: Plutonic - Inactive Volcanism, CV-3: Extensional Domain, CD-1: Intracratonic Basin, CD-2: Orogenic Belt, CD-3: Crystalline Rock - Basement) for this property.

Geologic Features

Modern Geothermal Features:

Relict Geothermal Features:

Volcanic Age: Recent

Host Rock Age:

Host Rock Lithology:

Cap Rock Age:

Cap Rock Lithology:

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Geofluid Geochemistry


Salinity (low):

Salinity (high):

Salinity (average):

Brine Constituents:

Water Resistivity:

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NEPA-Related Analyses (0)

Below is a list of NEPA-related analyses that have been conducted in the area - and logged on OpenEI. To add an additional NEPA-related analysis, see the NEPA Database.

CSV No NEPA-related documents listed.

Exploration Activities (0)

Below is a list of Exploration that have been conducted in the area - and cataloged on OpenEI. Add.png Add a new Exploration Activity

No exploration activities listed on OpenEI.


  1. 1.0 1.1 Osvaldo Vallejos-Ruiz. 2005. Lumped Parameter Model of The Miravalles Geothermal Field, Costa Rica. Proceedings of World Geothermal Congress; Antalya, Turkey: World Geothermal Congress.
  2. 2.0 2.1 2.2 Ruggero Bertani. 2005. World Geothermal Power Generation 2001-2005. Proceedings of World Geothermal Congress; Turkey: World Geothermal Congress.

List of existing Geothermal Resource Areas.

<metadesc> Miravalles Geothermal Area is a known Geothermal Resource Area. </metadesc>