[Opm] Cell Convergence Debugging

[Hallam, Antony R]

I had some issues with the saturation properties which I’ve capped using OPERATE and that appears to be helping. I can let that play out and get back to you. Can I attach files to mailing list or what way to you all prefer to share things?

Cheers
Tony

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From: OPM User<mailto:opmuser0 at gmail.com>
Sent: 18 May 2020 09:30
To: opm at opm-project.org<mailto:opm at opm-project.org>
Subject: [Opm] Cell Convergence Debugging

Tony,

Alf is correct, in nearly all cases poor convergence is nearly always
related to the data: aquifer not in equilibrium with the hydrocarbon
zone, negative fluid compressibilities, etc. If you can share your model
then I'll take a look. If not then if you send me the *.PRT, *.LOG and
*.DBG files I'll have a quick look to see if there is anything obvious
from these files.

Also are you getting?

|Time step 2, stepsize -nan days, at day 0.04/31, date = 01-Jan-2021
Error:
[/build/opm-simulators-4CUPDM/opm-simulators-2019.10-rfinal/opm/simulators/flow/BlackoilModelEbos.hpp:268]
NaN residual found!�[0m Problem: Solver convergence failure - Numerical
problem encountered Timestep chopped to -nan days|
||

Nobody  responded to my GitHub issue question "How Many Hours in a -nan
Day? #2503 " - perhaps it was something of a "black-hole" to investigate
:-).

I don't' have a general solution to this, but I have resolve a few cases
of the above due to data inconsistencies.

Release 2020-04 is out, so perhaps you can try your model with the new
release.
||

OPM User
opmuser0 at gmail.com


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