Akita Geothermal Field

From Open Energy Information

Area Overview

Geothermal Area Profile

Location: Akita, Japan

Exploration Region: Northeast Honshu Arc

GEA Development Phase: Operatonal
"Operatonal" 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: 40.0111°, 140.7447°

Resource Estimate

Mean Reservoir Temp: 275°C
548.15 K
527 °F
986.67 °R

Estimated Reservoir Volume: 12.5 km³
12,500,000,000 m³
2.999 mi³
441,433,334,012.5 ft³
16,349,382,737.5 yd³
12,500,000,000,000 L

Mean Capacity: 88.3 MW
88,300 kW
88,300,000 W
88,300,000,000 mW
0.0883 GW
8.83e-5 TW

USGS Mean Reservoir Temp:

USGS Estimated Reservoir Volume:

USGS Mean Capacity:

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History and Infrastructure

Operating Power Plants: 3

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Developing Power Projects: 0

No geothermal projects listed.

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Power Production Profile

Gross Production Capacity:

Net Production Capacity:

Owners  :
  • Mitsubishi Materials Co
  • Mitsubishi Materials Co/Tohoku Electric Power
  • Akita Geothermal Energy Co/Tohoku Electric Power

Power Purchasers :

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:

Sanyal Classification (Wellhead):

Reservoir Temp (Geothermometry):

Reservoir Temp (Measured):

Sanyal Classification (Reservoir):

Depth to Top of Reservoir: 1000 m
1 km
0.621 mi
3,280.84 ft
1,093.61 yd

Depth to Bottom of Reservoir: 2500m
2.5 km
1.553 mi
8,202.1 ft
2,734.025 yd

Average Depth to Reservoir: 1750 m
1.75 km
1.087 mi
5,741.47 ft
1,913.818 yd

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Geology of the Area

Geologic Setting

Tectonic Setting: Subduction Zone

Controlling Structure: Major Normal Fault

Topographic Features: Shield Volcano

Brophy Model: Type B: Andesitic Volcanic Resource

Moeck-Beardsmore Play Type: CV-1a: Magmatic - Extrusive, CV-3: Extensional Domain
"CV-1a: Magmatic - Extrusive, CV-3: Extensional Domain" 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: Fumaroles, Hot Springs

Relict Geothermal Features: Hydrothermally Altered Rock

Volcanic Age: Quaternary

Host Rock Age: Tertiary

Host Rock Lithology: Dacite

Cap Rock Age: Quaternary

Cap Rock Lithology: Andasite

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Geofluid Geochemistry


Salinity (low): 2500

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 1.2 Ruggero Bertani. 2005. World Geothermal Power Generation 2001-2005. Proceedings of World Geothermal Congress; Turkey: World Geothermal Congress.
  2. Sabodh K. Garg, Jim Combs. 02/2015. A reformulation of USGS volumetric “heat in place” resource estimation method. Geothermics. 55:150-158.
  3. Henry J. Ramey, Jr., Roland N. Horne, Paul Kruger, Frank G. Miller, William E. Brigham, Jean W. Cook. 1993. Proceedings- 18th workshop geothermal reservoir engineering. Stanford, CA: 18th Workshop Geothermal Reservoir Engineering. Report No.: SGP- TR-145.
  4. Benjamin Matek. Geo-energy [Internet]. Geothermal Energy Association. [updated 2015/04/28;cited 2015/04/28]. Available from: http://geo-energy.org/

List of existing Geothermal Resource Areas.