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Switch to RES_VOL_FRAC_SEP for realistic fracture size/count
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‎docs/Fervo_Project_Cape-4.md

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| Well diameter | 9⅝ inches | Next standard size up from 7", implied by announcement of "increasing casing diameter" |
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| Flow Rate per Production Well | 107 kg/s | Maximum flow rate achieved at Cape Station per https://www.businesswire.com/news/home/20240910997008/en/Fervo-Energys-Record-Breaking-Production-Results-Showcase-Rapid-Scale-Up-of-Enhanced-Geothermal. The announced increased casing diameter implies higher flow rates. |
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| Number of doublets | 54 | Estimate based on extrapolation from Project Red and Fervo_Project_Cape-3 |
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| Reservoir size & geometry | 149 rectangular 1400m×1400m fractures; 30m fracture separation | Actual number and size of fractures not known; inputs chosen to create reservoir volume that is compatible with required heat extraction profile. |
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| Reservoir size & geometry | Reservoir Volume = 5801599999 m**3, Fracture Separation = 10m | Extrapolation to create case study heat extraction profile. Actual number and size of fractures not known. |
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| Water Loss Rate | 15% | Water loss rate estimated to be between 10 and 20% |
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| Maximum Drawdown | 0.009 | Tuned to keep minimum net electricity generation ≥ 500 MWe and number of times redrilling = 1 |
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| Reservoir Impedance | 0.001 GPa.s/m³ | |
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## Results
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| Metric | Result Value | Reference Value | Reference Source |
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|-----------------------------------------------|-----------------------------------------------------------------------|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| LCOE | $75.3/MWh | $80/MWh | https://www.nature.com/articles/s44359-024-00019-9 |
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| Plant capital costs | $4375/kW (based on maximum total electricity generation of 562.54 MW) | $4500/kW | https://www.nature.com/articles/s44359-024-00019-9 |
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| Minimum Net Electricity Generation | 504.64 MW | 500 MW | https://fervoenergy.com/fervo-energy-announces-31-mw-power-purchase-agreement-with-shell-energy/. The 500 MW PPA is interpreted to mean that Cape Station's net electricity generation must never fall below 500 MWe. |
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| Well Drilling and Completion Cost Correlation | $4.72M/well | $4.8M/well | https://houston.innovationmap.com/fervo-energy-drilling-utah-project-2667300142.html |
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| WACC | 8.3% | 8.3% | https://www.linkedin.com/pulse/fervo-energy-technology-day-2024-entering-geothermal-decade-matson-n4stc |
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| After-tax IRR | 17.73% | 15–25% | Typical levered returns for energy projects |
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| Number of times redrilling | 1 | 1–2 | Redrilling expected to be required within 5–10 years of project start |
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| Metric | Result Value | Reference Value | Reference Source |
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|-----------------------------------------------|----------------------------------------------------------|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| LCOE | $75.1/MWh | $80/MWh | https://www.nature.com/articles/s44359-024-00019-9 |
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| Plant capital costs | $4372/kW (based on maximum total electricity generation) | $4500/kW | https://www.nature.com/articles/s44359-024-00019-9 |
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| Minimum Net Electricity Generation | 504.82 MW | 500 MW | https://fervoenergy.com/fervo-energy-announces-31-mw-power-purchase-agreement-with-shell-energy/. The 500 MW PPA is interpreted to mean that Cape Station's net electricity generation must never fall below 500 MWe. |
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| Well Drilling and Completion Cost Correlation | $4.72M/well | $4.8M/well | https://houston.innovationmap.com/fervo-energy-drilling-utah-project-2667300142.html |
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| WACC | 8.3% | 8.3% | https://www.linkedin.com/pulse/fervo-energy-technology-day-2024-entering-geothermal-decade-matson-n4stc |
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| After-tax IRR | 17.77% | 15–25% | Typical levered returns for energy projects |
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| Number of times redrilling | 1 | 1–2 | Redrilling expected to be required within 5–10 years of project start |

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