Project showcase

Deep Geothermal Wells: Technical and Commercial Feasibility Study

Project goal

To explore the technical and commercial feasibility of developing and constructing deep geothermal wells

Client:

Start-up Geothermal Well Development Company

Asset:

Deep underground geothermal wells designed to produce hot water or electricity

The technical and commercial feasibility of using existing oil and gas drilling technology to efficiently develop and construct a deep “downhole heat exchanger” by connecting multilateral well bores with “feeder” and “producer” geothermal wells

Why were we contracted?

  • Lack of capacity to conduct this study in-house
  • There was a requirement to construct the geothermal wells using relief well drilling and electromagnetic ranging technology, which the client had no technical expertise on
  • There was a commercial driver to side-track multiple wells from a single well bore, which the client had no experience of
  • The location of the desired wells meant they had to be drilled through hard rocks, which are extremely challenging in terms of drilling rate and equipment endurance
  • Unable to analyze and identify all possible risks, due to lack of experience and expertise


What we did

  • Analysis and identification of suitable strategies for construction of geothermal wells
  • Analysis and identification of suitable technologies that would enable the wells to be drilled efficiently and effectively
  • Development of detailed recommendations for how to utilize relief well drilling tactics to connect the lateral boreholes being drilled to an existing well
  • Cost benefit analysis
  • Development of recommendations for cost effective, safe, and efficient development of geothermal wells
  • High level risk analysis

Deliverables

Feasibility report (findings and recommendations) detailing:

  • Summary of risks identified for the development of the geothermal wells
  • Relief well drilling strategy recommendations on how to optimize intersection tactics
  • Technical equipment recommendations required for the project (e.g., rig, rotating equipment, drill bits, mud, cement, casing, cuttings handling
  • Step by step process for well construction
  • Cost investment requirements

Benefits delivered

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Successful Test Well

Provided technical recommendations and advice which was used to drill a vertical test well

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Additional Funding Unlocked

The study enabled the client to acquire more funding to pursue the project

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Assurance of Technical Do-ability

The project could be achieved utilizing existing technology, meaning the company did not need to invest additional funds into new technologies

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Clear Investment Strategy

Ability to define the projected project costs and capture this in the future budget

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Efficiency Gains

Recommended drill bits and rotating technology, designed to unlock efficiencies in the drilling process

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Utilization of “Green” Energy Solutions

The study concluded that geothermal wells could be developed underneath the airport, allowing heat to be generated in a carbon friendly manner

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