Geothermal Resource Engineering Experts

From geothermal exploration to on-site drilling management and development planning, Geothermal Resource Group Inc. (GRG) provides complete, cost-effective solutions for your resource engineering needs. GRG can help you minimize drilling and development costs without compromising long-life, well production. Our hands-on team of geothermal experts averages over 20 years geothermal experience, per professional, in 18 countries on 6 continents and at 87 hot water and steam fields worldwide. We are the geothermal resource experts in the industry. Let GRG assist you with the planning, development, optimization, and management for a successful geothermal endeavor.


Geothermal Services

GRG offers comprehensive geothermal development and management services, plus customized solutions to suit specific needs. Whether your project requires complete on-site supervision or selective injection testing and well repairs, our drilling engineers have the expertise to initiate, complete, and operate your project more efficiently.

Drilling Engineering

Our versatile drilling department offers a complete range of well design and construction services to meet specific client requirements:

  • Design and repair geothermal wells
  • Prepare drilling and workover programs
  • Drilling and workover project management
  • Drilling and workover supervision
  • Handle permitting applications and regulatory filing

Resource Quantification

  • Numerical simulation, conceptual modeling
  • Bank feasibility studies
  • Resource assessment
  • Monte Carlo analysis
  • Economics and forecasting, NPV analysis

Reservoir Engineering

  • Wellbore simulation
  • Optimum wellbore flow design
  • Design & supervise geothermal well flow tests
  • Interference testing, pressure transient testing
  • Analyze to quantify productive capacity
  • Well remedial work
  • Determine optimal development strategies
  • Integrated reservoir management

Exploration & Geoscience

  • Initial site investigation, including identification and assessment of existing documentation and data
  • Exploration programs including selection, planning, and supervision of geophysical studies, geologic mapping, and fluid sampling
  • Conceptual modeling, geologic modeling
  • Preliminary assessment reports and recommendations for initial-stage development activities
  • Well targeting and geologic prognoses
  • Wellsite geology
  • Temperature/pressure logging, well log planning and interpretation
  • Well test planning, supervision, data collection, and assessment