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adjust gradient for 175C BHT
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‎tests/examples/Fervo_Project_Red-2026.out‎

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Original file line numberDiff line numberDiff line change
@@ -6,32 +6,32 @@ Simulation Metadata
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----------------------
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GEOPHIRES Version: 3.13.1
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Simulation Date: 2026-04-19
9-
Simulation Time: 09:11
10-
Calculation Time: 0.170 sec
9+
Simulation Time: 09:15
10+
Calculation Time: 0.163 sec
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***SUMMARY OF RESULTS***
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End-Use Option: Electricity
15-
Average Net Electricity Production: 1.87 MW
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Electricity breakeven price: 111.50 cents/kWh
15+
Average Net Electricity Production: 1.62 MW
16+
Electricity breakeven price: 124.72 cents/kWh
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Number of production wells: 1
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Number of injection wells: 1
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Flowrate per production well: 36.0 kg/sec
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Well depth: 2.3 kilometer
21-
Geothermal gradient: 74 degC/km
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Geothermal gradient: 71.11 degC/km
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***ECONOMIC PARAMETERS***
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Economic Model = BICYCLE
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Accrued financing during construction: 5.00 %
28-
Inflation costs during construction: 1.34 MUSD
28+
Inflation costs during construction: 1.30 MUSD
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Project lifetime: 2 yr
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Capacity factor: 90.0 %
31-
Project NPV: -24.28 MUSD
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Project IRR: -74.44 %
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Project VIR=PI=PIR: 0.09
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Project MOIC: -0.84
31+
Project NPV: -23.91 MUSD
32+
Project IRR: -76.85 %
33+
Project VIR=PI=PIR: 0.08
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Project MOIC: -0.86
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Project Payback Period: N/A
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Estimated Jobs Created: 5
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@@ -42,9 +42,9 @@ Simulation Metadata
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Well depth: 2.3 kilometer
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Water loss rate: 30.0 %
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Pump efficiency: 80.0 %
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Injection temperature: 56.5 degC
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Injection temperature: 56.3 degC
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Production Wellbore heat transmission calculated with Ramey's model
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Average production well temperature drop: 4.7 degC
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Average production well temperature drop: 4.5 degC
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Flowrate per production well: 36.0 kg/sec
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Injection well casing ID: 4.276 in
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Production well casing ID: 4.276 in
@@ -56,13 +56,13 @@ Simulation Metadata
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Maximum reservoir temperature: 400.0 degC
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Number of segments: 1
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Geothermal gradient: 74 degC/km
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Geothermal gradient: 71.11 degC/km
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***RESERVOIR PARAMETERS***
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Reservoir Model = Multiple Parallel Fractures Model (Gringarten)
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Bottom-hole temperature: 181.69 degC
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Bottom-hole temperature: 174.99 degC
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Fracture model = Rectangular
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Well separation: fracture height: 160.00 meter
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Fracture width: 160.00 meter
@@ -71,7 +71,7 @@ Simulation Metadata
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Number of fractures: 100
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Fracture separation: 10.00 meter
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Reservoir volume: 25344000 m**3
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Reservoir hydrostatic pressure: 22052.96 kPa
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Reservoir hydrostatic pressure: 22113.27 kPa
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Plant outlet pressure: 10342.14 kPa
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Production wellhead pressure: 1551.32 kPa
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Productivity Index: 0.49 kg/sec/bar
@@ -83,15 +83,15 @@ Simulation Metadata
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***RESERVOIR SIMULATION RESULTS***
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Maximum Production Temperature: 177.5 degC
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Average Production Temperature: 177.0 degC
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Minimum Production Temperature: 175.7 degC
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Initial Production Temperature: 175.7 degC
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Average Reservoir Heat Extraction: 18.20 MW
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Maximum Production Temperature: 171.0 degC
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Average Production Temperature: 170.5 degC
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Minimum Production Temperature: 169.3 degC
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Initial Production Temperature: 169.3 degC
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Average Reservoir Heat Extraction: 17.22 MW
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Production Wellbore Heat Transmission Model = Ramey Model
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Average Production Well Temperature Drop: 4.7 degC
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Average Injection Well Pump Pressure Drop: 2566.0 kPa
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Average Production Well Pump Pressure Drop: 10752.4 kPa
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Average Production Well Temperature Drop: 4.5 degC
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Average Injection Well Pump Pressure Drop: 2626.3 kPa
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Average Production Well Pump Pressure Drop: 10817.8 kPa
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***CAPITAL COSTS (M$)***
@@ -102,44 +102,44 @@ Simulation Metadata
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Drilling and completion costs per vertical injection well: 3.02 MUSD
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Drilling and completion costs per non-vertical section: 1.80 MUSD
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Stimulation costs: 1.51 MUSD
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Surface power plant costs: 9.92 MUSD
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Surface power plant costs: 9.06 MUSD
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Field gathering system costs: 1.60 MUSD
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Total surface equipment costs: 11.52 MUSD
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Total capital costs: 26.78 MUSD
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Total surface equipment costs: 10.67 MUSD
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Total capital costs: 25.93 MUSD
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***OPERATING AND MAINTENANCE COSTS (M$/yr)***
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Wellfield maintenance costs: 0.19 MUSD/yr
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Power plant maintenance costs: 0.36 MUSD/yr
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Wellfield maintenance costs: 0.18 MUSD/yr
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Power plant maintenance costs: 0.33 MUSD/yr
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Water costs: 0.28 MUSD/yr
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Total operating and maintenance costs: 0.83 MUSD/yr
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Total operating and maintenance costs: 0.80 MUSD/yr
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***SURFACE EQUIPMENT SIMULATION RESULTS***
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Initial geofluid availability: 0.15 MW/(kg/s)
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Maximum Total Electricity Generation: 2.58 MW
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Average Total Electricity Generation: 2.56 MW
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Minimum Total Electricity Generation: 2.51 MW
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Initial Total Electricity Generation: 2.51 MW
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Maximum Net Electricity Generation: 1.89 MW
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Average Net Electricity Generation: 1.87 MW
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Minimum Net Electricity Generation: 1.82 MW
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Initial Net Electricity Generation: 1.82 MW
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Average Annual Total Electricity Generation: 20.20 GWh
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Average Annual Net Electricity Generation: 14.76 GWh
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Initial pumping power/net installed power: 37.90 %
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Initial geofluid availability: 0.14 MW/(kg/s)
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Maximum Total Electricity Generation: 2.33 MW
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Average Total Electricity Generation: 2.31 MW
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Minimum Total Electricity Generation: 2.27 MW
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Initial Total Electricity Generation: 2.27 MW
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Maximum Net Electricity Generation: 1.64 MW
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Average Net Electricity Generation: 1.62 MW
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Minimum Net Electricity Generation: 1.57 MW
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Initial Net Electricity Generation: 1.57 MW
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Average Annual Total Electricity Generation: 18.24 GWh
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Average Annual Net Electricity Generation: 12.77 GWh
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Initial pumping power/net installed power: 44.07 %
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Average Pumping Power: 0.69 MW
133-
Heat to Power Conversion Efficiency: 10.28 %
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Heat to Power Conversion Efficiency: 9.40 %
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************************************************************
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* HEATING, COOLING AND/OR ELECTRICITY PRODUCTION PROFILE *
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************************************************************
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YEAR THERMAL GEOFLUID PUMP NET FIRST LAW
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DRAWDOWN TEMPERATURE POWER POWER EFFICIENCY
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(degC) (MW) (MW) (%)
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1 1.0000 175.73 0.6903 1.8212 10.1137
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2 1.0085 177.21 0.6902 1.8791 10.3067
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1 1.0000 169.26 0.6932 1.5728 9.2338
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2 1.0084 170.69 0.6931 1.6264 9.4287
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*******************************************************************
@@ -148,8 +148,8 @@ Simulation Metadata
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YEAR ELECTRICITY HEAT RESERVOIR PERCENTAGE OF
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PROVIDED EXTRACTED HEAT CONTENT TOTAL HEAT MINED
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(GWh/year) (GWh/year) (10^15 J) (%)
151-
1 14.7 143.1 6.84 7.00
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2 14.9 143.9 6.32 14.05
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1 12.7 135.4 6.40 7.08
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2 12.9 136.2 5.91 14.20
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********************************
@@ -159,6 +159,6 @@ Year Electricity | Heat |
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Since Price Ann. Rev. Cumm. Rev. | Price Ann. Rev. Cumm. Rev. | Price Ann. Rev. Cumm. Rev. | Price Ann. Rev. Cumm. Rev. | OPEX Net Rev. Net Cashflow
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Start (cents/kWh)(MUSD/yr) (MUSD) |(cents/kWh) (MUSD/yr) (MUSD) |(cents/kWh) (MUSD/yr) (MUSD) |(USD/lb) (MUSD/yr) (MUSD) |(MUSD/yr) (MUSD/yr) (MUSD)
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________________________________________________________________________________________________________________________________________________________________________________________
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0 0.00 0.00 0.00 | 0.00 0.00 0.00 | 0.00 0.00 0.00 | 0.00 0.00 0.00 | 0.00 -26.78 -26.78
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1 15.00 2.20 2.20 | 2.50 0.00 0.00 | 2.50 0.00 0.00 | 0.00 0.00 0.00 | 0.83 1.37 -25.41
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2 15.00 2.23 4.43 | 2.50 0.00 0.00 | 2.50 0.00 0.00 | 0.00 0.00 0.00 | 0.83 1.40 -24.01
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0 0.00 0.00 0.00 | 0.00 0.00 0.00 | 0.00 0.00 0.00 | 0.00 0.00 0.00 | 0.00 -25.93 -25.93
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1 15.00 1.90 1.90 | 2.50 0.00 0.00 | 2.50 0.00 0.00 | 0.00 0.00 0.00 | 0.80 1.11 -24.83
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2 15.00 1.93 3.83 | 2.50 0.00 0.00 | 2.50 0.00 0.00 | 0.00 0.00 0.00 | 0.80 1.13 -23.69

‎tests/examples/Fervo_Project_Red-2026.txt‎

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@@ -18,8 +18,7 @@ Fracture Width, 160, -- per the paper (distance between wellbores assumes a dipo
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Fracture Separation, 10 meter
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Number of Segments, 1
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Gradient 1, 74
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# Gradient 1, 78, -- 191°C BHT at 7,600 ft TVD
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Gradient 1, 71.11, -- 175°C BHT at 7,600 ft TVD
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Plant Outlet Pressure, 1500 psi, -- per the paper
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