Ohaaki Geothermal Area

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Ohaaki Geothermal Area

Area Overview

Geothermal Area Profile

Location: New Zealand

Exploration Region: Taupo Volcanic Zone

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: -38.523099420711°, 176.29825176514°

Resource Estimate

Mean Reservoir Temp: 265°C538.15 K
509 °F
968.67 °R

Estimated Reservoir Volume: 15 km³15,000,000,000 m³
3.599 mi³
529,720,000,815 ft³
19,619,259,285 yd³
15,000,000,000,000 L

Mean Capacity: 122 MW122,000 kW
122,000,000 W
122,000,000,000 mW
0.122 GW
1.22e-4 TW

USGS Mean Reservoir Temp:

USGS Estimated Reservoir Volume:

USGS Mean Capacity:

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History and Infrastructure

Operating Power Plants: 1

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Developing Power Projects: 0

No geothermal projects listed.

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Power Production Profile

Gross Production Capacity: 103 MW103,000 kW
103,000,000 W
103,000,000,000 mW
0.103 GW
1.03e-4 TW

Net Production Capacity:

Owners  :
  • Contact Energy

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:
  • "d" is not declared as a valid unit of measurement for this property.
  • The given value was not understood.

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: 260°C533.15 K
500 °F
959.67 °R

Sanyal Classification (Wellhead):

Reservoir Temp (Geothermometry):

Reservoir Temp (Measured):

Sanyal Classification (Reservoir):

Depth to Top of Reservoir: 1000 m1 km
0.621 mi
3,280.84 ft
1,093.61 yd

Depth to Bottom of Reservoir: 2500 m2.5 km
1.553 mi
8,202.1 ft
2,734.025 yd

Average Depth to Reservoir: 1750 m1.75 km
1.087 mi
5,741.47 ft
1,913.818 yd

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Geology of the Area

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Geofluid Geochemistry


Salinity (low):

Salinity (high):

Salinity (average):

Brine Constituents: Base metal sulfides, see table 3 (Hedenquist, 1990) [3]

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 1.3 Ruggero Bertani. 2005. World Geothermal Power Generation 2001-2005. Proceedings of World Geothermal Congress; Turkey: World Geothermal Congress.
  2. Benjamin Matek. Geo-energy [Internet]. Geothermal Energy Association. [updated 2015/04/28;cited 2015/04/28]. Available from: http://geo-energy.org/
  3. The Thermal and Geochemical Structure of the Broadlands-Ohaaki Geothermal System, New Zealand

List of existing Geothermal Resource Areas.

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