Olkaria Geothermal Area

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Olkaria Geothermal Area

Area Overview

Geothermal Area Profile

Location: Nairobi, Kenya

Exploration Region: East African Rift System - Kenya Rift

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: -1.0224007920051°, 36.47421875°

Resource Estimate

Mean Reservoir Temp: 275°C548.15 K
527 °F
986.67 °R

Estimated Reservoir Volume: 57.2 km³57,200,000,000 m³
13.723 mi³
2,019,998,936,441.2 ft³
74,814,775,406.8 yd³
57,200,000,000,000 L

Mean Capacity: 602 MW602,000 kW
602,000,000 W
602,000,000,000 mW
0.602 GW
6.02e-4 TW

USGS Mean Reservoir Temp:

USGS Estimated Reservoir Volume:

USGS Mean Capacity:

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History and Infrastructure

Operating Power Plants: 6

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Developing Power Projects: 0

No geothermal projects listed.

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Power Production Profile

Gross Production Capacity: 265 MW265,000 kW
265,000,000 W
265,000,000,000 mW
0.265 GW
2.65e-4 TW

Net Production Capacity:

Owners  :
  • KenGen
  • Ormat Technologies Inc
  • Oserian Development Company

Power Purchasers :
  • Kenya Power and Lighting Company Limited

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:
  • "c" 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:

Sanyal Classification (Wellhead):

Reservoir Temp (Geothermometry):

Reservoir Temp (Measured):

Sanyal Classification (Reservoir):

Depth to Top of Reservoir: 500m0.5 km
0.311 mi
1,640.42 ft
546.805 yd

Depth to Bottom of Reservoir: 2700m2.7 km
1.678 mi
8,858.268 ft
2,952.747 yd

Average Depth to Reservoir: 1600m1.6 km
0.994 mi
5,249.344 ft
1,749.776 yd

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Geology of the Area

Geologic Setting

Tectonic Setting: Rift Zone

Controlling Structure:

Topographic Features:

Brophy Model: Type F: Oceanic-ridge, Basaltic 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:

Relict Geothermal Features:

Volcanic Age:

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 1.2 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/

List of existing Geothermal Resource Areas.

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