Super-deep AGS

[damogles]

Really appreciate the effort and the quality of this open-source simulation! Thank you!

I am simulating a closed-loop super-deep geothermal system (~10km depth with multiple laterals). I am wondering how the model behaves in those extreme conditions? My main concern is the dependability of the output value.

• how is supercritical condition treated?
• are there limits to extrapolation beyond the research-validated models which are in ~5km depth?
• how does maximum temperature influence the model? why is it not a function of depth, gradient, and ambient temperature?

I am curious about the exchange. And again, thank you!

[softwareengineerprogrammer]

Issues created during our discussion today, for posterity:

1. "Total Nonvertical Length" is actually per section #278
2. Total length not reflected in AGS input #279
3. AGS does not enforce Maximum Temperature #280
4. AGS: Math domain error for supercritical ORC plant #281
5. Negative pumping depth warning? #282?

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how is supercritical condition treated?

are there limits to extrapolation beyond the research-validated models which are in ~5km depth?

High-level answer: these handled by Wanju extrapolations (currently) and/or SBT (near-future); @malcolm-dsider can possibly provide additional context.