Ngatamariki Geothermal Area

From Open Energy Information

Area Overview

Geothermal Area Profile

Location: New Zealand

Exploration Region: New Zealand Geothermal Region

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: -38.1353°, 176.3281°

Resource Estimate

Mean Reservoir Temp: 280°C
553.15 K
536 °F
995.67 °R

Estimated Reservoir Volume: 17 km³
17,000,000,000 m³
4.079 mi³
600,349,334,257 ft³
22,235,160,523 yd³
16,999,999,999,999.998 L

Mean Capacity: 82 MW
82,000 kW
82,000,000 W
82,000,000,000 mW
0.082 GW
8.2e-5 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:

Net Production Capacity:

Owners  :
  • Mighty River Power

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:

Sanyal Classification (Wellhead):

Reservoir Temp (Geothermometry):

Reservoir Temp (Measured):

Sanyal Classification (Reservoir):

Depth to Top of Reservoir: 600m
0.6 km
0.373 mi
1,968.504 ft
656.166 yd

Depth to Bottom of Reservoir: 3000m
3 km
1.864 mi
9,842.52 ft
3,280.83 yd

Average Depth to Reservoir: 1800m
1.8 km
1.118 mi
5,905.512 ft
1,968.498 yd

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Geology of the Area

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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

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  1. 1.0 1.1 1.2 1.3 1.4 Catherine Boseley, William Cumming, Luis Urzúa-Monsalve, Tom Powell and Malcolm Grant. 2010. A Resource Conceptual Model for the Ngatamariki Geothermal Field Based on Recent Exploration Well Drilling and 3D MT Resistivity Imaging. Proceedings of World Geothermal Congress; Indonesia: World Geothermal Congress.
  2. Benjamin Matek. Geo-energy [Internet]. Geothermal Energy Association. [updated 2015/04/28;cited 2015/04/28]. Available from:

List of existing Geothermal Resource Areas.