Fervo_Norbeck_Latimer_2023.txt

# Case Study: Fervo Project Red (2023)
#  Norbeck J.H. and Latimer T.M. 2023.
#    "Commercial-Scale Demonstration of a First-of-a-Kind Enhanced Geothermal System."
#    https://doi.org/10.31223/X52X0B
#   Drilling Price paper:
#      "Review Of Drilling Performance In A Horizontal EGS Development"
#      Kareem El-Sadi Brittany Gierke Elliot Howard Christian Gradl
#      https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2024/Elsadi.pdf
#  Looking to make:
#          gross power production of 2 to 3.5 MWe
#          production temperature of 336 degF (169 degC)
#          pumping power 500 to 1000 kW

Reservoir Model, 1
Reservoir Volume Option, 1,
Reservoir Density, 2800, -- per the paper phyllite + quartzite + diorite + granodiorite
Reservoir Depth, 7600 feet, -- per the paper
Reservoir Heat Capacity, 1000, -- [J/kg/K]
Reservoir Thermal Conductivity, 2.7
Number of Fractures, 100, -- per the paper
Fracture Shape, 4, -- per the paper
Fracture Height, 160, -- per the paper
Fracture Width, 160, -- per the paper (distance between wellbores assumes a dipole flow field)
Fracture Separation, 10 meter
Number of Segments, 1
Gradient 1, 74, -- per the paper
Plant Outlet Pressure, 1500 psi, -- per the paper
Number of Injection Wells, 1
Number of Production Wells, 1
Well Geometry Configuration, 4
Has Nonvertical Section, True
Multilaterals Cased, True
Number of Multilateral Sections, 2, -- Two parallel horizontal sections
Total Nonvertical Length, 3250 feet, -- per the paper
Well Drilling Cost Correlation, 10, -- per the drill cost paper - works out to $400/ft
Horizontal Well Drilling Cost Correlation, 10, -- per the drill cost paper - works out to $400/ft
Production Flow Rate per Well, 41, -- =650 gpm per the paper - per the paper the maximum flow rate was 63 L/s but the range was 550-750 gpm
Production Well Diameter, 7, -- per the paper
Injection Well Diameter, 7, -- per the paper
Well Separation, 365 feet, -- per the paper
Injection Temperature, 38 degC, -- per the paper 75 to 125 degF
Injection Wellbore Temperature Gain, 3, -- [degC]
Reservoir Impedance, 0.30, -- per paper, matching pumping power report 500-1000 kW
Ramey Production Wellbore Model, 1
Utilization Factor, .9
Water Loss Fraction, 0.1
Maximum Drawdown, 1, -- no redrilling considered
Ambient Temperature, 8 degC, -- per the paper. Published ambient is 10.27 degC
Surface Temperature, 8 degC, -- per the paper. Published ambient is 10.27 degC
End-Use Option, 1, -- electricity as the main product
Plant Lifetime, 10
Power Plant Type, 2, -- supercritical binary cycle
End-Use Efficiency Factor, .9
Circulation Pump Efficiency, 0.80, -- per the paper
Economic Model, 3, -- BICYCLE Levelized Cost Model
Starting Electricity Sale Price, 0.15
Ending Electricity Sale Price, 1.00, -- essentially no limit as the rate can rise continuously with inflation
Electricity Escalation Rate Per Year, 0.004053223, -- End up being about 2% inflation
Electricity Escalation Start Year, 1
Fraction of Investment in Bonds, .5, -- Required for BICYCLE model
Combined Income Tax Rate, .3, -- Required for BICYCLE model
Gross Revenue Tax Rate, 0, -- Required for BICYCLE model
Inflated Bond Interest Rate, .05, -- Required for BICYCLE model
Inflated Equity Interest Rate, .08, -- Required for BICYCLE model
Inflation Rate, .02, -- Required for BICYCLE model
Investment Tax Credit Rate, 0, -- Required for BICYCLE model
Inflation Rate During Construction, 0.05
Property Tax Rate, 0, -- Required for BICYCLE model
Print Output to Console, 1
Time steps per year, 10