GEOPHIRES-X/tests/examples/example_SAM-single-owner-PPA-8_heat.txt at main · NatLabRockies/GEOPHIRES-X · GitHub

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# Example: SAM Single Owner PPA Economic Model: Direct-Use Heat
# See documentation: https://softwareengineerprogrammer.github.io/GEOPHIRES/SAM-EM_End-Uses-and-Surface-Applications.html

# *** ECONOMIC/FINANCIAL PARAMETERS ***
# *************************************
Economic Model, 5, -- SAM Single Owner PPA

Inflation Rate, .027, -- US inflation as of December 2025

Starting Heat Sale Price, 0.0123
Ending Heat Sale Price, 0.0359
Heat Escalation Rate Per Year, 0.01

Fraction of Investment in Bonds, .7
Discount Rate, 0.12
Inflated Bond Interest Rate, .07

Inflated Bond Interest Rate During Construction, 0.105
Bond Financing Start Year, -1

Construction Years, 3

Construction CAPEX Schedule, 0.075,0.525,0.4, -- DOE-ATB hybrid scenario

Investment Tax Credit Rate, 0.3
Combined Income Tax Rate, .2555
Property Tax Rate, 0.0022

Capital Cost for Power Plant for Electricity Generation, 1900

Well Drilling Cost Correlation, 3
Well Drilling and Completion Capital Cost Adjustment Factor, 0.9, -- 2024b Geothermal ATB

Reservoir Stimulation Capital Cost per Injection Well, 4
Reservoir Stimulation Capital Cost per Production Well, 4

Field Gathering System Capital Cost Adjustment Factor, 0.35

# *** SURFACE & SUBSURFACE TECHNICAL PARAMETERS ***
# *************************************************

End-Use Option, 2, -- Direct-Use Heat
Power Plant Type, 9, -- Industrial heat

Plant Lifetime, 30

Surface Temperature, 13

Number of Segments, 3
Gradient 1, 74
Thickness 1, 2.5
Gradient 2, 41
Thickness 2, 0.5
Gradient 3, 39.1

Reservoir Depth, 2.68

Reservoir Density, 2800
Reservoir Heat Capacity, 790
Reservoir Thermal Conductivity, 3.05
Reservoir Porosity, 0.0118

Reservoir Model, 1, -- Multiple Parallel Fractures (Gringarten)
Reservoir Volume Option, 1, -- FRAC_NUM_SEP: Reservoir volume calculated with fracture separation and number of fractures as input

Number of Fractures per Stimulated Well, 150
Fracture Separation, 9.8255

Fracture Shape, 4, -- Rectangular
Fracture Width, 305
Fracture Height, 100

Water Loss Fraction, 0.01

Ambient Temperature, 11.1728

Utilization Factor, .9
Plant Outlet Pressure, 2000 psi
Circulation Pump Efficiency, 0.80

# *** Well Bores Parameters ***

Number of Production Wells, 6
Number of Injection Wells per Production Well, 0.666, -- 5-well bench pattern (3 producers : 2 injectors)

Nonvertical Length per Multilateral Section, 5000 feet
Number of Multilateral Sections, 0, -- This parameter is set to 0 because the cost of horizontal drilling is included within the 'vertical drilling cost.' This approach allows us to more directly convey the overall well drilling and completion cost.

Production Flow Rate per Well, 100

Production Well Diameter, 8.535, -- Inner diameter of 9⅝ inch casing size
Injection Well Diameter, 8.535, -- See Production Well Diameter

Production Wellhead Pressure, 303 psi

Injectivity Index, 1.38
Productivity Index, 1.13

Ramey Production Wellbore Model, True, -- Ramey's model estimates the geofluid temperature drop in production wells
Injection Temperature, 53.6, -- Calibrated with GEOPHIRES model-calculated reinjection temperature
Injection Wellbore Temperature Gain, 3

Maximum Drawdown, 0.0025

# *** SIMULATION PARAMETERS ***
# *****************************
Maximum Temperature, 500
Time steps per year, 12