Geothermal Institute

Our services

Our consulting services are linked to the eight phases* of a geothermal project.  The first seven cover the key development activities before the geothermal project is completed and the final phase of operation and maintenance can begin.


*The phases for geothermal development are based on The Energy Sector Management Assistance Program (ESMAP).  ESMAP is a global knowledge and technical assistance program administered by the World Bank.  



Project Development Phase

Phase Tasks

Our Expertise

1.  Preliminary Survey
The preliminary survey phase includes a first reconnaissance of a geothermal area based on a nationwide or regional study and concludes with the initiation of a pre-feasibility study

  • Data Collection & Inventory
    Nationwide Survey
  • Selection Of Promising Areas
  • EIA & Necessary Permits
  • Planning Of Exploration


  • Geoscience
  • Policy & Planning
2.  Exploration
The exploration phase consists of surface level surveys to further confirm the preliminary resource assessment.
  • Surface (Geological)
  • Subsurface (Geophysical)
  • Geochemical, Soundings (MT/TEM)
  • Gradient & Slim Holes
  • Seismic Data Acquisition
  • Pre-Feasibility Study
  • Geoscience

3.  Test drilling
This phase is the last one of the exploratory phases. It begins with a drilling programme, designed to develop a target that will confirm the existence, exact location, and potential of the reservoir. 


  • Slim Holes
  • Full Size Wells
  • Well Testing & Stimulation
  • Interference Tests
  • First Reservoir Simulation
  • Reservoir Engineering
  • Reservoir Modelling
4.  Project Review and Planning
This phase includes the evaluation of all existing data by the developer, including new data from the exploratory phases. 
  • Evaluation & Decision Making
  • Feasibilty Study & Final EIA
  • Drilling Plan
  • Design Of Facilities
  • Financial Closure / PPA
  • Geoscience
  • Reservoir Engineering
  • Reservoir Modelling
  • Policy & Planning
  • Above-ground Engineering
5.  Field Development
This phase marks the beginning of the actual development of the power project and consists of drilling production and reinjection wells, and partially constructing the pipelines to connect the wells to the plant.
  • Production Wells
  • ReInjection Wells
  • Cooling Water Wells
  • Well Stimulation
  • Reservoir Simulation
  • Reservoir Engineering
  • Reservoir Modelling
  • Above-ground Engineering
6.  Construction
This phase comprises installation of the steam gathering system, the separators, the power plant with the turbine, generator, and the’ cold end’.

The electricity generated is sent to a substation and from there to the transmission grid.
  • Steam / Hot Water Pipelines
  • Power Plant & Cooling
  • Substation & Transmission
  • Reservoir Engineering
  • Above-ground Engineering
7.  Start-up & Commissioning
Start-up and commissioning of the power plant is the final phase before the plant starts regular operation. This phase usually involves resolving many technical and contractual issues with the supplier of the plant.
  • Reservoir Engineering
  • Above-ground Engineering
8.  Operation & Maintenance
Operation and maintenance can be divided into the O&M for the steam field (wells, pipelines, infrastructure, etc.) and the O&M of the power plant (turbine, generator, cooling system, substation, etc.). Proper maintenance of all facilities is crucial to ensure a high availability factor and capacity.
  • Geoscience
  • Reservoir Engineering
  • Reservoir Modelling
  • Above-ground Engineering