Fervo_Project_Cape-5: Multi-Year Construction Timeline and Reservoir Engineering updates

[softwareengineerprogrammer]

Description

1. Addresses Project Cape Construction Timelines & Reservoir Engineering Updates NREL/GEOPHIRES-X#443
2. Addresses Remove or clarify SAM-EM project payback period NREL/GEOPHIRES-X#413 (8764602)
3. Addresses SAM Economic Models ITC should be derived from cash flow NREL/GEOPHIRES-X#404 (SAM-EM ITC output #124)

Web interface links:

1. Fervo_Project_Cape-5 (500 MW/Phase II): https://gtp.scientificwebservices.com/geophires/?shared-geophires-result-id=effff059-b8d9-4c11-af32-5943083614b6
2. Fervo_Project_Cape-6 (100 MW/Phase I): https://gtp.scientificwebservices.com/geophires/?shared-geophires-result-id=3fe9f9c6-bb24-4331-84f0-22805154ac2b

TODO

1. 🚧 SME review (reservoir engineering)
2. 🚧 Calibrate Fervo_Project_Cape-6: 866b4c8
   1. Strip (irrelevant) param comments
3. Clarify
4. Incorporate ATB updates: https://atb.nrel.gov/electricity/2024b/geothermal
5. Royalties (BLM): 469b250
6. Sensitivity analysis: address why higher flow rates != better economics: 632e79e
7. Reference https://www.resfrac.com/wp-content/uploads/2025/06/Singh-2025-Fervo-Project-Cape.pdf: 0b7da6c
8. Calibrate exploration cost to https://atb.nrel.gov/electricity/2024b/geothermal: b94b01f
   1. Created tracking issue to update GEOPHIRES correlation :Update exploration cost correlation according to 2024b ATB NREL/GEOPHIRES-X#447
9. 🚧 Documentation and references
   1. Drilling & stim costs clarifications in Inputs: 64da798, 77e5fd2
   2. Clarify calibration of drawdown/redrilling wrt 1-2% expected annual decline: Technical results graphs #125, Production temperature technical results graph #126
   3. Construction CAPEX schedule
   4. Approach & Methodology update: Clarify SOAK vs. FOAK vs. NOAK: 1e960e4
   5. Describe case study use cases e.g. as a template for custom modeling: 1e960e4
   6. ITC
   7. TOD/ambient temp: 3f96592
   8. OCC vs total capex: a791d54
10. Sensitivity analysis chart tweaks:
    1. Flow rate text overlap
    2. Link titles (on hover)
11. Sensitivity analysis: https://github.com/scientific-web-services/geophires-fpc4-sensitivity-analysis
12. Surface temperature fine-tune based on Project InnerSpace GeoMap: 9af9f1d
13. Multiple construction years: Update Fervo_Project_Cape-4 based on publicly stated timelines - https://fervoenergy.com/fervo-energy-raises-462-million-series-e-to-accelerate-geothermal-development-and-meet-surging-energy-demand-with-clean-firm-power/
    1. Phase II: 500 MW: Fervo_Project_Cape-4
    2. Phase I: 100 MW: Fervo_Project_Cape-5: 71607b7
14. Reservoir engineering updates
    1. ~8.5" ID
    2. Flow rate
    3. Fracture surface area
    4. PI/II instead of impedance
    5. Number of Fractures per Stimulated Well
    6. Increased lateral length (adjust fracture separation accordingly)
15. Higher discount & bond rates

Testing & Verification

1. Unit tests added: Retains test for previous version: https://github.com/softwareengineerprogrammer/GEOPHIRES/pull/117/changes#diff-77443b51920606ff05244e83370cb4bbd78fb8ee13076d9356d5051c2c9fbef5
2. Unit tests updated: https://github.com/softwareengineerprogrammer/GEOPHIRES/pull/117/changes#diff-35ea0c0b80463f35958a7d1d7396bad7ad397a7c8e8d96a49da5b90e756c7c7c
3. Manually tested

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Change Checklist:

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Before merging:

1. Add a CHANGELOG entry (example). RST Template:

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