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Alison

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Everything posted by Alison

  1. Logarithmic scale

    We have added this as a bug in our database and will try to fix it in the next maintenance release. In the meantime, you would have to take a screen shot of the linear legend and manually change the legend labels in a graphics program if you need a linear legend with logarithmic labels. We have put together an excel file that will help you calculate the appropriate labels for a given data range. If anyone else needs this, please contact me at alison @rockware.com and I will send this to you. Thanks, Alison
  2. Dimension of the inclined flow model

    Dear Lang Zou, You cannot create a grid with non-vertical boundaries in PetraSim. You would have to rotate the gravity vector about a flat grid to get the model you want. To do this, go to Properties / Global Properties and click on the Misc. tab. Best Regards, Alison
  3. Again, the answer to this question depends on how you've modified the model input. Keep in mind that flux through a model is always across cell boundaries. If you have modified the gravity vector to simulate an inclined model, then the flux would be across cell connections that are at an angle to the gravity vector and the majority of the flux would probably be across the x and y connections. If you have kept the gravity vector as a vertical vector, then flux will be divided between the x/y and z connections.
  4. The answer to this question really depend on whether you've made this an inclined model by using the layer editor to control the elevation of the cell tops and bases, or whether you have modified the angle of the gravity vector. If you've modified the gravity vector, then cells have essentially been rotated with respect to the gravity vector and kx would be like the second image. If you've modified the cell elevations, then the x and y connections are still perpendicular to the gravity vector and the kx and ky connections are vertical. Keep in mind that if you take this approach you are introducing a small amount of error into the model since the top and base cell connections are no longer horizontal.
  5. Iinjection rate and resulting water velocity

    Jaeshik, I would not expect the velocity be exactly proportional in a 2D model but I would still expect it to increase with increased pumping. If you want to send me your SIM file, I'll take a quick look and let you know if I see anything strange. Regards, Alison
  6. MESH CREATION IN PETRASIM

    After looking at the user's SIM file we realized that the program wasn't acting as expected because the wells in the SIM file were non-vertical. The program typically ignores non-vertical wells during meshing unless they are close to vertical within a threshold. The tolerance can be imagined as a vertical cylinder with the center axis going through the top point of the well. The cross-sectional area of the cylinder is the "Max area near wells" input. The solution is to use the option to add additional refinement points during mesh generation.
  7. MESH CREATION IN PETRASIM

    It would be helpful if we could take a look at your model - our tests show that the meshing tools get fairly close to the specified areas. For example I entered a value of 500 meters squared and the area of the cell intersecting the well was between 600 and 700. You can send your SIM file to Alison @ rockware.com. Best Regards, Alison
  8. Permeability modifier

    Could you tell me which simulator (TOUGH2, TOUGHREACT, etc.) and which EOS module you are using? Each fluid property module is slightly different, so it would be helpful if we could try to reproduce the problem ourselves. If you would like to send us your SIM file, that would probably be helpful as well. You can send it to Alison @ rockware.com. Best Regards, Alison
  9. Jaeshik, Unfortunately, I don't think there is a list of changes published. You would have to take into account changes implemented in both TOUGHREACT v2 and v3. PetraSim v2015 outputs TOUGHREACT v2 input files and also can be license with a TOUGHREACT v2 executable if you own the simulator. PetraSim v2015 also outputs TOUGHREACT v3 input files that should work with your TOUGHREACT v3 simulator (although keep in mind that this support is still really a beta version that has not been fully tested). Best Regards, Alison
  10. concentration output

    The EOS7C simulator doesn't give you an option to output data as a concentration, but the simulator does output a density for gas. If you want to send us an example of the model you've described, we can take a look at it and let you know if we see any reason why you would get such similar results with such drastically different initial conditions. My guess is that the additional mass is showing up in the model in the aqueous phase. Thanks, Alison
  11. free exit boundary (outflow boundary)

    Hi Amy, I think that most people would simply use a fixed state boundary cell to represent an open boundary. When a cell is specified as "fixed state", fluid (and gas) can flow in and out of the cell without effecting the pressure, temperature and phase state of the cell. Best Regards, Alison
  12. Another option (although maybe not quite as exact as you were looking for) would be to plot the 3D well trace with depth labels, along with the fault plane. You can create the fault plane as a grid through the Grid / Initialize program or as a ribbon through the Fault menu in the Utilities. The depth labels should give you a ballpark estimate of the measured depth at which the well trace crosses the plane.
  13. The key here is that TOUGH2 does not use element numbers, but rather uses “names” composed of 3 characters and 2 numbers. Because FORTRAN does not easily output leading zeros on integers, you end up with spaces in the number portion of the ELEME name. Thanks, Alison
  14. There is no way to load a savechem file like you can a save file, so that the results are loaded directly into the interface as initial conditions. Instead, you would need to use the TOUGHREACT / Restart Options menu to restart the model as documented in the TOUGHREACT manual. Best Regards, Alison
  15. Curve Column Static Line?

    I can think of a couple of ways to do this. 1. Add another curve to your LDFX file and your DAT files that is placed directly above or below the chloride curve (you can adjust the order of the columns by right clicking and choosing "send to back"). You'll have to assign it the same horizontal scale as the chloride curve, and you should add constant values to the DAT file. 2. If you can eyeball where the 100 mg/kg line is on the Log Design, you can add a vertical line to the LDFX file. I hope this helps. If you have additional questions, please let us know or contact us a tech @ rockware.com. Best Regards, Alison
  16. Plane history plot

    Amy, Unfortunately, I can't think of an easier way to do this. You might try looking at the connection data (stored in the conn.csv file) to see if there is anything here that might help with your calculations. Best Regards, Alison
  17. Temperature distribution

    Luca, I'm not sure why you would get a temperature of 0 in the model like this. If you'd like to send me your SIM file, I would be happy to take a look at it. Best Regards, Alison Alison @ Rockware.com
  18. Thank you for taking a look at PetraSim v2015! You should be able to import the v1.2 SIM file into the v2 model by going to File / Import TOUGHREACT as V2 menu. If you are doing this and still getting the described results, it would be very helpful if you could send us the following: 1. Your original v1.2 SIM file 2. The new SIM file after you imported the v1.2 SIM file (and saved). We have not yet added support for Aqueous Kinetics in the interface. I'll make sure that this in our the programmers list of features to add to the program. Best Regards, Alison (Alison @ rockware.com)
  19. Thomas, Thank you for letting us know that you found a solution! Best Regards, Alison
  20. Well productivity index

    The program does not seem to adjust the PI value based on the dz or varying k values. It does output the HG value, which is a cell thickness value. I believe that when calculating the PI for multi-cell wells, the dz would be the entire length of the well. I don't know what you would do in a situation with multiple k values. I would suggest that you submit this to the LBNL TOUGH2 forum, as the authors are better qualified to answer this question. Thanks, Alison
  21. EOS7C initial conditions

    Here is the PDF attachment. eos7c discussion-3.pdf
  22. EOS7C initial conditions

    I wanted to post a PDF discussion of this topic on the forum for others to look at. The initial mass fraction of NCG is in the aqueous phase. The equation of state will calculate the equilibrium value in the gas phase. The remaining gas will be methane. Because a very small mass fraction of aqueous N2 leads to a much larger equilibrium mass fraction of gas, you have to use very low initial NCG values during initialization. Thanks to Dan Swenson at Thunderhead for putting this together. If anyone would like to see the spreasheet or SIM files used here, please contact me at alison @ rockware.com. Thanks, Alison
  23. Exporting Water Types from AqQA

    Unfortunately, AqQA does not include any tools for a mass export of the data analysis information. We will put this on the wishlist for a future version of the program. Best Regards, Alison
  24. EOS7C initial conditions

    Amy, I have also had a hard time initializing a model with very little methane and mostly NCG using EOS7C. If you would like to send me your SIM file, I can experiment a bit with that, but think that this might be a better question for the LBNL TOUGH2 forum. It is my understanding that you would want to make the NCG mass fraction very large. Whatever part of the gas phase that is not make up of water vapor or NCG will be methane. Best Regards, Alison
  25. flow mass fraction

    Could you tell me where the PetraSim program is producing a flow mass fraction? Are you referring to output in the well plot, or in sink/source plots? Best Regards, Alison
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