Fervo_Norbeck_Latimer_2023.txt

# Case Study: Fervo Energy Whitepaper
#  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, 7700 feet, per the paper
Reservoir Heat Capacity, 1000
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, 76.74, 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
Nonvertical Length per Multilateral Section, 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, 41.02, =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
Reservoir Impedance, 0.33, per paper, matching pumping power report 500-1000 kW
Ramey Production Wellbore Model, True
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, 1, subcritical 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