[Opm] FW: [Help] Convergence issues - FLOW

[Nair, R. (Rohith)]

Hi Alf,

The switch linear_solver_ignoreconvergencefailure=true doesn't seem to help in this case.

Additionally, a deck file (https://gist.github.com/nairr/8dbe35141a7b93dda90a1babd462b843 ) which used to run with FLOW_2016.04_stablerelease, gives the following error with FLOW_2016.04_current:  Floating point exception (core dumped). I think the same issue has been referenced in opm-simulators #731.

Cheers,
Rohith

From: Alf Birger Rustad [mailto:abir at statoil.com]
Sent: woensdag 15 juni 2016 16:28
To: Nair, R. (Rohith); opm at opm-project.org
Subject: RE: [Opm] FW: [Help] Convergence issues - FLOW

Hi Rohith,

One thing you can try right away is the new switch for ignoring convergence failure for the linear solver. On the command line or in a parameter file you can add:
linear_solver_ignoreconvergencefailure=true

Cheers,
Alf
________________________________
From: Opm [opm-bounces at opm-project.org] on behalf of Nair, R. (Rohith) [rohith.nair at tno.nl]
Sent: Wednesday, June 15, 2016 3:39 PM
To: opm at opm-project.org<mailto:opm at opm-project.org>
Subject: [Opm] FW: [Help] Convergence issues - FLOW
Dear OPM community,

At the recently held OPM meeting I had mentioned that we at TNO are facing convergence issues with FLOW when using perturbed schedule files and also with handling well openings (Note: ECLIPSE is able to deal with these perturbed schedule files). I believe it was mentioned that you guys were already working towards a fix for these sort of issues. We would appreciate your help/suggestions/workarounds in solving these convergence issues and ultimately improving the robustness of the FLOW simulator in the process.

Please find the relevant data available for download from the following link: https://we.tl/OBTYWPLnwg

The download contains:


1.       Failed simulation with FLOW for simple water injection rate optimization (successful simulation is also included): The only difference between the successful and failed simulation is different water injection rates

2.       Failed simulation where wells are opened at predefined intervals

3.       Benchmark plots which successfully compare FLOW with other simulators(E100, MRST, Mores, AD-GPRS) for oil-water flow simulation

Thanks and Kind regards,
Rohith Nair
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