Christine Doughty's Profile - TOUGH User Community

Re: How to consider the evaporation effect of water affected by temperature in tough2

All versions of TOUGH can simulate evaporation. The instructions you show give three options for how to specify a evaporation at the ground surface. More details on this topic may be found in the…

Staff Scientist
Christine_Doughty
4 yrs agoTue, December 15, 2020 at 5:04 PM UTC
TOUGH2
Reported - view

Re: Infiltration into dry soil

Dear Masha, When I look at your output file, I do not see any iteration failure. You asked the code to run 10 steps and it did. However, there appear to be problems in your input file.…

Staff Scientist
Christine_Doughty
4 yrs agoMon, December 14, 2020 at 5:12 PM UTC
1
TOUGH3
Reported - view

Re: Initialization (T2Well)

I think that should work. You should remove the lateral connections between the monitoring well and the adjacent surface grid blocks that have been given a huge volume,…

Staff Scientist
Christine_Doughty
4 yrs agoMon, December 14, 2020 at 4:44 PM UTC
TOUGH3
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Re: How to consider the evaporation effect of water affected by temperature in tough2

Dear Sue, The partitioning of water into liquid and gaseous phases is determined by steam tables, which are built into TOUGH. For a given temperature and pressure condition in a grid block,…

Staff Scientist
Christine_Doughty
4 yrs agoMon, December 14, 2020 at 4:32 PM UTC
TOUGH2
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Re: T2Well (Error message)

@Refaat G Hashish When you bought T2Well did you buy just the executable or the executable plus the source code? If you just bought the executable, the instructions I gave you for changing the file…

Staff Scientist
Christine_Doughty
4 yrs agoThu, November 19, 2020 at 6:03 PM UTC
TOUGH3
Reported - view

Re: Coupled reservoir-wellbore model initialization (using T2Well)

I am generally familiar with how T2Well works, but I have not actually used it. I recommend that you look at the user's guide, and examine the governing equations for wellbore flow to see whether…

Staff Scientist
Christine_Doughty
4 yrs agoThu, November 19, 2020 at 5:49 PM UTC
TOUGH3
Reported - view

Re: Coupled reservoir-wellbore model initialization (using T2Well)

I think you are correct that T=1 is too small for the EOS you are using. SATB is just the name of the subroutine where the code fails, but the important thing here is that for some reason the…

Staff Scientist
Christine_Doughty
4 yrs agoWed, November 18, 2020 at 12:35 AM UTC
TOUGH3
Reported - view

Re: Coupled reservoir-wellbore model initialization (using T2Well)

Try decreasing the wellbore permeability by a factor of 10. If that does not help decrease it more. You want wellbore permeability to be very high compared to reservoir permeability,…

Staff Scientist
Christine_Doughty
4 yrs agoFri, November 13, 2020 at 8:21 PM UTC
TOUGH3
Reported - view

Re: Coupled reservoir-wellbore model initialization (using T2Well)

I recommend making the permeability of the well material equal to the reservoir permeability for the initialization run. With no sources or sinks, it does not need to have high permeability.…

Staff Scientist
Christine_Doughty
4 yrs agoFri, November 13, 2020 at 4:47 PM UTC
TOUGH3
Reported - view

Re: T2Well (Error message)

I don't think so. As I recall, providing output in excel format is a new feature with TOUGH3. For TOUGH2, there is a free utility program called Ext (available for download,…

Staff Scientist
Christine_Doughty
4 yrs agoFri, November 6, 2020 at 5:17 PM UTC
TOUGH3
Reported - view

Re: T2Well (Error message)

T2Well has TOUGH2 built into it, so it can model coupled reservoir-wellbore problems. We do not currently have a "T3Well" where TOUGH3 is coupled to a wellbore simulator.…

Staff Scientist
Christine_Doughty
4 yrs agoThu, November 5, 2020 at 8:45 PM UTC
TOUGH3
Reported - view

Re: T2Well (Error message)

Dear Refaat, According to the message, your grid has 243220 connections but the code is set to have maximum of 57000 connections. In the T2 file, you need to find the parameter MNCON at set it to…

Staff Scientist
Christine_Doughty
4 yrs agoThu, November 5, 2020 at 3:47 AM UTC
TOUGH3
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Re: TOUGH3; long running time (3D model)

Hi Refaat, I tried your input file, using TOUGH3 with ECO2N and got the same result as you. I tried decreasing the permeability in the monitoring-well material to 10^-10 and it runs the 20 time…

Staff Scientist
Christine_Doughty
4 yrs agoThu, October 29, 2020 at 4:32 PM UTC
TOUGH3
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Re: Mobility concept in TOUGH (Parameter MOP(11) )

Hi Diego, Mobility generally refers to the product of absolute permeability and relative permeability. If you have different absolute permeabilities for sandstone and mudstone,…

Staff Scientist
Christine_Doughty
4 yrs agoFri, October 23, 2020 at 3:08 PM UTC
TOUGH2
Reported - view

Re: Phase transitions with tough3-eos7r

Hi Mikey, Using your input file and tough3-eos7r running in an Ubuntu Window on a Windows 10 laptop, I get the attached output. The error messages at step 25 look like yours,…

Attachment

Staff Scientist
Christine_Doughty
4 yrs agoThu, August 20, 2020 at 11:25 PM UTC
TOUGH3
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Re: TOUGH3; Running time is too long

Dear Refaat, When I run your problem on a Linux machine, I think I am getting results like yours - a small time step of about 10 s that does not grow. When this happens,…

Staff Scientist
Christine_Doughty
4 yrs agoMon, August 10, 2020 at 7:54 PM UTC
TOUGH3
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Re: TOUGH3; Running time is too long

Yingqi, I also noticed this problem (on Linux, but not on Windows) - the code wouldn't even start to run and gave me an error message about bad dimensions.…

Staff Scientist
Christine_Doughty
4 yrs agoFri, August 7, 2020 at 11:39 PM UTC
TOUGH3
Reported - view

Re: TOUGH3; Running time is too long

Refaat. Could you explain what you mean by "instability of the numerical results"? I do not have specific suggestions for solver options. See the TOUGH3 manual for MOP(21) and the SOLVR block for…

Staff Scientist
Christine_Doughty
4 yrs agoFri, August 7, 2020 at 8:21 PM UTC
TOUGH3
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Re: TOUGH3; Running time is too long

Dear Refaat, I do not see anything obviously wrong with your input file. When I try to run TOUGH3/eco2n on a Windows 10 machine, using an Ubuntu window,…

Staff Scientist
Christine_Doughty
4 yrs agoFri, August 7, 2020 at 6:17 PM UTC
TOUGH3
Reported - view

Re: Temperature limit

TMVOC has an upper limit of T=350 C and P=1e8 Pa. It checks at the start of each time step whether T and P are within bounds, and it stops if not. You should get a message "CANNOT FIND PARAMETERS AT…

Staff Scientist
Christine_Doughty
4 yrs agoFri, July 24, 2020 at 3:41 PM UTC
TMVOC
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Re: Why does the partial pressure of carbon dioxide change so much when SG is greater than zero？

@Liheng Wang You need to run your simulation longer to get to steady state. At steady state, Pco2 in the middle element is the same as Pco2 in the high-pressure boundary,…

Staff Scientist
Christine_Doughty
4 yrs agoThu, July 16, 2020 at 4:34 PM UTC
TOUGH2
Reported - view

Re: Why does the partial pressure of carbon dioxide change so much when SG is greater than zero？

@Liheng Wang It looks like everything I need is in flow.inp. Thanks.

Staff Scientist
Christine_Doughty
4 yrs agoWed, July 15, 2020 at 6:31 PM UTC
TOUGH2
Reported - view

Re: Why does the partial pressure of carbon dioxide change so much when SG is greater than zero？

Very interesting problem, and nice illustrations. I have no experience with EOS2, but I think what is happening is that for the T=99 case when you have single-phase liquid conditions for all times,…

Staff Scientist
Christine_Doughty
4 yrs agoWed, July 15, 2020 at 4:29 PM UTC
TOUGH2
Reported - view

Re: Steady-state simulation of a low-type geothermal system

Dear Hakim, You should use the Command Line option in Petrasim, where you specify the name of the input file you want to use (in your case, the T1_modified file).…

Staff Scientist
Christine_Doughty
4 yrs agoMon, July 13, 2020 at 8:56 PM UTC
TOUGH2
Reported - view

Re: How to improve the stability of the numerical results without changing the grid discretization ?

I can think of one easy thing for you to try: increase rock compressibility COM (second line in ROCKS entry for each material). Your current value of 3.71E-10 is pretty small.…

Staff Scientist
Christine_Doughty
4 yrs agoThu, July 2, 2020 at 10:07 PM UTC
TOUGH3
Reported - view