Ulubelu Geothermal Field

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Ulubelu Geothermal Field

Area Overview

Geothermal Area Profile

Location: Sumatra, Indonesia

Exploration Region: Indonesia 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: -4.9671574579647°, 104.68009533203°

Resource Estimate

Mean Reservoir Temp: 130°C403.15 K
266 °F
725.67 °R

Estimated Reservoir Volume:

Mean Capacity: 2 MW2,000 kW
2,000,000 W
2,000,000,000 mW
0.002 GW
2.0e-6 TW

USGS Mean Reservoir Temp:

USGS Estimated Reservoir Volume:

USGS Mean Capacity:

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History and Infrastructure

Operating Power Plants: 2

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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  :
  • PLN

Power Purchasers :
  • Fuji

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:
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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: 600m0.6 km
0.373 mi
1,968.504 ft
656.166 yd

Depth to Bottom of Reservoir: 1200m1.2 km
0.746 mi
3,937.008 ft
1,312.332 yd

Average Depth to Reservoir: 900m0.9 km
0.559 mi
2,952.756 ft
984.249 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.

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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 Suharno and PRL Browne. 2000. Subsurface Hydrothermal Alteration At The Ulubelu Geothermal Field, Lampung, Southern Sumatra Indonesia. Proceedings of Twenty-Fifth Workshop On Geothermal Reservoir Engineering; Stanford, California: Stanford University.
  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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