Skip to main content
Calcimator

Geothermal Well Design Calculator

Estimate well depth, casing, flow rate, and cost for a geothermal well.

Inputs

ft
°F
gpm
in
$/ft

Results

Total Well Cost

$950,000.00

≈ 23 Teslas

Thermal Output

16.12 MW

Thermal Output55,000,000 BTU/hr
Fluid Velocity2 ft/s
Casing Cost$175,000.00
How to Use This Calculator
  1. Enter the building's heating and cooling load in tons.
  2. Set the desired loop fluid temperature range.
  3. Input the local soil or rock thermal conductivity in W/(m·K).
  4. Review the recommended number of wells and total borehole depth.
  5. Confirm the design with a licensed geothermal contractor and thermal conductivity test (TRT).

How the result changes with Target Depth

Target DepthTotal Well CostThermal Output
2,090$411,650.0016.12 MW
7,065$1,332,025.0016.12 MW
13,035$2,436,475.0016.12 MW
18,010$3,356,850.0016.12 MW

What each input means

Target Depth
Planned well depth.
Reservoir Temperature
Expected temperature at reservoir depth.
Target Flow Rate
Target production flow rate.
Casing Diameter
Production casing inner diameter.
Drilling Cost
Drilling cost per foot of depth.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Target Depth = 5000, Reservoir Temperature = 300, Target Flow Rate = 500, Casing Diameter = 10 = 5 input(s) provided
  2. Calculate Total Well Cost
    Total Well Cost
    950000 = $950,000
  3. Calculate Thermal Output
    Thermal Output
    16.12 = 16.12
  4. Calculate Thermal Output
    Thermal Output
    55000000 = 55000000
  5. Calculate Fluid Velocity
    Fluid Velocity
    2 = 2

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Geothermal Energy

Geothermal Gradient Calculator

Calculate temperature at depth from the geothermal gradient.

Geothermal Energy

Enhanced Geothermal Output Calculator

Calculate power output from an enhanced geothermal system (EGS).

Oil & Gas

Drilling Cost Calculator

Estimate per-foot and total drilling cost from rig rate and depth.

Geothermal Energy

Geothermal COP Calculator

Calculate coefficient of performance from source and delivery temperatures.

More in Energy & Utilities.