GEOPHIRES/tests/examples/example_SHR-3.txt at main · softwareengineerprogrammer/GEOPHIRES · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
# Example: Superhot Rock 3: Newberry Volcano NOAK SHR Scenario
# Adapted from:
# Super Hot EGS and the Newberry Deep Drilling Project (Cladouhos et al., 2018).
#   https://pangea.stanford.edu/ERE/pdf/IGAstandard/SGW/2018/Cladouhos.pdf
# and
# Techno-Economic Viability of Next Generation Geothermal Resources Across the Temperature Spectrum:
#   A Comparative Analysis with Superhot Rock (Pezzino, 2026).
#   https://scientificwebservices.com/shr


# ******************** RESERVOIR ********************
Reservoir Model, 1, -- Multiple Parallel Fractures Model (Gringarten et al., 1975)

Reservoir Depth, 4
Reservoir Density, 2700
Reservoir Heat Capacity, 1000
Reservoir Thermal Conductivity, 2.7

Reservoir Volume Option, 1, -- FRAC_NUM_SEP: calculate heat-in-place based on realistic fracture geometry. Number of Fractures calculated in code.
Fracture Shape, 4, -- Bench design and fracture geometry in Singh et al., 2025 are given in rectangular dimensions.
Fracture Separation, 9.8255
Fracture Width, 305
Fracture Height, 100
Number of Fractures per Stimulated Well, 150

Number of Segments, 1
Gradient 1, 112
Maximum Temperature, 600

# ******************** WELL BORES ********************
Number of Production Wells, 2
Number of Injection Wells per Production Well, 0.5

Well Geometry Configuration, 4, -- L (required for lateral costing)

# Production Wellhead Pressure, 325 psi

Maximum Drawdown, 1

Production Well Diameter, 8.535, -- Inner diameter of 9⅝ inch casing size, the next standard casing size up from 7 inches, implied by announcement of “increasing casing diameter” (Fervo Energy, 2025).
Injection Well Diameter, 8.535

Injectivity Index, 2.185875, -- Derated 27.5% from NREL 2024b ATB conservative scenario
Productivity Index, 1.80815, -- Derated 27.5% from NREL 2024b ATB conservative scenario

Injection Temperature, 50
Injection Wellbore Temperature Gain, 3
Ramey Production Wellbore Model, True

Production Flow Rate per Well, 60

# ******************** SURFACE & PLANT ********************
End-Use Option, 1, -- Electricity
Power Plant Type, 4, -- Double-Flash

Water Loss Fraction, 0.2375, -- Average of 14.5-33% range (Clark et al., 2010)
# Range given in Clark et al., 2010: https://www.energy.gov/eere/geothermal/articles/water-use-development-and-operations-geothermal-power-plants-0

Ambient Temperature, 2, -- Estimated temperature near Newberry Volcano
Surface Temperature, 2

Plant Lifetime, 25
Circulation Pump Efficiency, 0.80
Plant Outlet Pressure, 1 atm
Utilization Factor, .9

Construction Years, 3, -- Matches Fervo_Project_Cape-6
Construction CAPEX Schedule, 0.0258, 0.256, 0.7182, -- Derived from Fervo_Project_Cape-6

Project Latitude, 43.812139, -- Newberry National Volcanic Monument
Project Longitude, -121.281671, -- Newberry National Volcanic Monument

# ******************** ECONOMICS ********************
Economic Model, 5, -- SAM Single Owner PPA

Starting Electricity Sale Price, 0.095, -- Upper end of ranges given in NREL Annual Technology Baseline (ATB) (NREL, 2024)
# NREL ATB: https://atb.nrel.gov/electricity/2024/geothermal
Electricity Escalation Rate Per Year, 0.00057, -- Conservatively calibrated to escalate to 10 cents/kWh at Year 11 (as opposed to calibrating to inflation which would escalate more quickly)
Electricity Escalation Start Year, 1
Ending Electricity Sale Price, 0.15

Discount Rate, 0.105
Fraction of Investment in Bonds, .7, -- https://www.linkedin.com/pulse/fervo-energy-technology-day-2024-entering-geothermal-decade-matson-n4stc/ suggests a long-term target of 85% debt; the value we use may be calibrated towards this in the future.
Inflated Bond Interest Rate, .07, -- 2024b ATB (NREL)

Inflated Bond Interest Rate During Construction, 0.105, -- Higher than interest rate during normal operation to account for increased risk of default prior to COD
Bond Financing Start Year, -2 yr, -- Equity-only for first 2 construction years (ATB)

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

Combined Income Tax Rate, 0.2700, -- Estimated effective combined federal and Oregon state income tax rate
Property Tax Rate, 0.0081, -- Estimated effective Oregon property tax rate
Investment Tax Credit Rate, 0.3

Reservoir Stimulation Capital Cost per Injection Well, 4, -- Baseline stimulation cost of $4.0M, calibrated from high-intensity U.S. shale well analogue (~$39k/frac stage for 102 stages). This is a pre-contingency value and excludes EGS-specific cost premiums such as ceramic proppant and HPHT hardware.
Reservoir Stimulation Capital Cost per Production Well, 4, -- Baseline stimulation cost of $4.0M, calibrated from high-intensity U.S. shale well analogue (~$39k/frac stage for 102 stages). This is a pre-contingency value and excludes EGS-specific cost premiums such as ceramic proppant and HPHT hardware.
Reservoir Stimulation Capital Cost Adjustment Factor, 1.8162293703140313

Field Gathering System Capital Cost Adjustment Factor, 0.339, -- Gathering costs represent 2% of facilities CAPEX per https://www.linkedin.com/pulse/fervo-energy-technology-day-2024-entering-geothermal-decade-matson-n4stc/

Well Drilling Cost Correlation, 16
Well Drilling and Completion Capital Cost Adjustment Factor, 1.8162293703140313

Capital Cost for Power Plant for Electricity Generation, 2280

Total O&M Cost, 6.5

# ******************** OTHER ********************
Time steps per year, 12

Do Carbon Price Calculations, True
Units:Total Saved Carbon Production, kilotonne

Print Output to Console, 0