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Alison

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Everything posted by Alison

  1. Volumetric calculation of I-Data model

    Yes, this is possible when displaying the model in RockPlot3D. If you are viewing the model as an isosurface, right click on the model in the RockPlot3D data tree (to the left of the view) and choose Options. As you adjust the iso-level, the volume of displayed material will change. If you are viewing the model using the "All Voxels" option, then you can set an upper and lower limit under the Filters option, and the program will update the volume based on the filters. Thanks, Alison
  2. How to cope with out-of-memory errors

    Unfortunately, if you are appending several models together in RockPlot3D, I think that you will eventually run into these memory errors (hopefully a future 64-bit version of RockWorks will help with this). If all of the models have the exact same extends and spacing, and if there is no overlap between stratigraphic units, then you might try the Solid / Filter / Replacement program in the Utilities to combine all of the models into a single RWMOD files (which will be much more manageable in RockPlot3D). Feel free to contact us directly with more details about this at tech @ rockware. com. Thanks, Alison
  3. I'm assuming that you are interested in the Map / Multi-log map menu item in RockWorks16. Unfortunately, this item does not have any tools for hanging the striplogs on a datum. The only way that I can think to do with would be for you to adjust the elevations in the boreholes so that the stratigraphic units of interest falls at an elevation of 0. You could then clip the boreholes in the database based on a distance away from this unit. Please feel free to send questions about this to tech @ rockware. com Best Regards, Alison
  4. Using a Civil 3D 2011 DEM file in RW15

    Mira, I opened your file up in a text editor, and it does not look like a real DEM. The first few lines of the DEM would include information about the extents and spacing of the grid. In this case, the first line is: Autodesk Export surface2DEM. Do you have an option to export a DXF Matrix? This might be a better way of going from Civil 3D to RockWorks. Best Regards, Alison Alison @ Rockware. com
  5. 3D striplogs with lithology color fill and P-data disks

    Unfortunately, there is really no way to do this unless the values in the P-Data table can be correlated to Lithology. If this is the case, then you could set up a custom color table that uses lithologic colors for various ranges of the values within the P-Data table. To use a custom color table for the P-Data fill, choose the “Based on Lookup-Table” option under the Disks/Color Options settings. I think that the feature you are looking for would be a good addition to RockWorks, so I’ll be submitting it to the programming team. Best Regards, Alison
  6. Bore hole surveys

    The Striplogs / Endpoint Comparison tool will give you the XYZ values at the bottom of each borehole. The program is really designed to compare endpoints between boreholes, so it will give you lots of other information as well. I'll add a request for a simple bottom hole xyz calculation to our wishlist. Please let me know if you have any other questions. Thanks, Alison
  7. Exceed limit of chdump calls (1000)

    Without seeing your model, its hard to know what the problem is (this error is documented on page 47 of the TOUGHREACT v1.2 Manual). You might try setting a maximum time step to see if that resolves the problem. You also might consider running the model until right before it crashes, and then restarting it with the CHDump output turned on - just in case it includes any useful information. If you continue to have problems, you are welcome to send me your SIM file, and I'll see if anything stands out to me. Best Regards, Alison alison @ rockware.com
  8. Exceed limit of chdump calls (1000)

    It sounds like you have the "Print Chemical Specificiation Output - ICHDUMP" option checked on under the Debug tab of the TOUGHREACT / Output Options menu. It states here that the simulation will end after 1000 time steps if this option is checked on. Best Regards, Alison
  9. I-Data Model problem with boundary

    Rudy, Without taking a look at your polygon and your model, its hard to know what the problem is. If the program seems to be clipping out a very this portion of the Gulf, is it possible that the cell spacing for your model is too large? Your cell spacing probably needs to be, at a minimum, 1/2 the thickness of the this thin portion within the polygon. If you continue to have problems, please feel free to back up your project through the file menu and send us an example of the problem. You can send this to tech @ rockware.com. Thanks, Alison
  10. Convergence problems

    Unfortunately, it is hard to know what the problem is without looking at your model. The output file may give you some information about the specific cell that is failing during the model run. If you can figure out which cell is the problem, you could try rerunning the model with the print options turned on for this cell to see if the time history plot gives you any more information. Feel free to send your SIM file to me - I would be happy to take a look. Best Regards, Alison Alison @ rockware.com
  11. Importing material type from ASCII files

    Ellen, This is available though the Model / Set Cell data menu. Thanks, Alison
  12. BH Strip Logs, Additional Data

    Another option would be to bring your striplog into ReportWorks and add header information there (you would have to type this in, as there is no linking to the RW database through ReportWorks). I've had other clients put together simple headers and footer in ReportWorks without a problem - just keep in mind that multi-page reports would be very challenging in ReportWorks (LogPlot would be more appropriate for anything other than pretty shallow boreholes). Thanks, Alison
  13. Flooding in Grounwater Vistas

    We would recommend that you send your model to ESI technical support. That being said, some causes of this could potentially be recharge that is too high, Kx that is too low and/or Kz that is too low.
  14. 3D borehole tubes not appearing circular

    My guess is that the problem may be caused by large XY coordinate values and small range of values, as can happen when using UTM meters for coordinates in a smaller area. The OpenGL graphics in RockPlot/3d does not have sufficient precision to show the variation on the order of 1 m when the northings are greater than 1,000,000 and the range is small. One way to resolve the problem is to subtract a number from the northing values in the project dimensions and data to reduce the number of digits and provide additional resolution. For example, use 6,300 instead of 746,300. This was reported by someone else in 2013 (forum topic 2079 titled Multi-log 3D distorted columns). If this suggestion doesn't work, then please zip up your project and send it to tech @ rockware.com. We would be happy to look into this further. Best Regards, Alison
  15. How to handle convergence problems

    Ellen, This error is fairly common, and typically means that the model has reached a state not supported by the simulator (for example, a very high pressure or temperature). What TOUGH2 module are you using? I would typically approach this problem by turning on the print options for element 2, and then rerunning the model. You can then view the results for this specific cell through the Results menu. If you continue to have problems, please go ahead and send me your SIM file. Thanks, Alison
  16. There is currently no way to do this. The program includes tools for creating conceptual models, and gridded surfaces created in Petrel could be loaded as ASCII files to create layer or internal boundaries. We would like to explore adding support for more input options, so if you'd like to send me an example of a grid exported from Petrel, please feel free to. My email address is Alison @ rockware.com. Thanks, Alison
  17. We hadn’t responded to this one because there is really no easy way to do this. However, because we've gotten more requests here, I thought that I would go ahead and post the following suggestion.I was able to establish the desired initial conditions using the following instructions. However, it would be important for you the experiment with adding boundary conditions such as fixed state cells, heat sources, etc. to be sure that these initial conditions are realistic steady state conditions. 1. Create the model and set the top layer as a fixed state layer. Run the model for several years to establish a hydrostatic pressure gradient. 2. Save the SIM file with a new name (and in a new folder), and then load the SAVE file created during step 1 as Initial conditions 3. Select the layers for which you have desired temperatures and make them fixed state, with a constant pressure and temperature. You can select a cell from the layer to determine the pressure that you should assign to the layer. Its important for you to assign a constant pressure to each model layer. 4. You will need to lower the permeability of the material in the model to a very low value, otherwise, fluid movement caused by convection will created convection cells. 5. Run the model for a very long time (for example, 1m years), and you should end up with results that mimic the desired temperature gradient (with linear gradients in-between the fixed state layers. I hope that this helps. Again, this isn’t really the best way to do this, but if it might help speed up the modeling process. I think that the ideal way to establish these types of conditions would be for you to build a model that reproduces the process that created the conditions in the first place (for example, the instruction of heat sources or fixed T cells at the bottom of the model, combined with fixed state cells at the edges of the geothermal feature being modeled. This is the recommendation of the TOUGH2 authors. Best Regards, Alison
  18. Ellen, If you've loaded internal boundaries that define the stratigraphy, then each conceptual model layer in your model (you may only have one called "Default") should be divided into Regions based on the internal boundaries. If you can select a specific region in the layer tree on the left side of the screen, you can tell the program to hide cells outside of the region with a right click. You can then select all of the cells with the interbed material type, right click, and change the material properties for the group of selected cells. If you have any problems with this, feel free to send me your SIM file and I'll take a look. Thanks, Alison
  19. well parameters

    The wells in PetraSim are really just meant to identify the cells that are intersected by the well, and to apply the appropriate sources/sinks for each cell. This is not a true coupled well model, so the well radius and casing is not taken into account. If you choose the "well on deliverability" option for a production well, then the productivity index value does taking into account a well radius and skin factor. You can find more about this on page 64 of the TOUGH2 manual. The well model option (which can't be applied to wells, but can be applied to individual cells allows you to link to output from wellbore flow simulation, which would presumably take into account the well radius. This is documented on page 66 of the TOUGH2 manual. Thanks, Alison
  20. automate volume calcuations

    Lara, I think that the Block Model Grade Statistics By Level program should give you what you want (it is a quicker way to achieve Option 2 above). Please take a look at the documentation for this feature, and let me know if you have any questions. I think that we just recently documented this feature in RockWorks16. If you are still using RockWorks15, contact me via email and I can send you a link to some basic documentation in our revision list. Best Regards, Alison (Alison @ rockware.com)
  21. 3D result

    The only reason that I can think that this would be happening is if you have all of the cells in your model set to "fixed state". Its also possible that your model has reached steady state.
  22. Modflow Export

    In this paper, I believe that they used the Lithology / Surface Map tool to extract lithology data that intersected grid surfaces that mimics the geometry of the MODFLOW layers. The lithology grids were then exported as either XYZ text files, or Surfer grids, through the Grid / Export menu in the RockWorks Utilities. This paper references the Groundwater Vistas interface, but my guess is that you could use a similar process in GMS or Visual MODFLOW. Best Regards, Alison
  23. Unfortunately, RockWorks lost this functionality when we added transparency to the two dimensional graphics. We will consider adding a PDF export to the program in the future that will support both transparency and vector objects. For what is worth, your graphics are now editable in RockWorks (they were not in RockWorks99). I think that many of our customers now make edits to the diagrams directly in RockPlot2D, rather than taking them out to another program. Please let me know if you have additional questions about this. Best Regards, Alison
  24. 3D T-Data Statistics Map (RW15) - elevation issue

    Thanks for the explanation. Unfortunately, there is really no way to do this. I would recommend that you export the data for the sampling event to the Utilities and then model it through the Solid / Model menu (you can then delete any duplicate samples that you don't want to use). The other option would be to assign a very specific date (or maybe a date/time combination) to the samples that you want to use for the model. Please let me know if you have other questions. Thanks, Alison
  25. 3D T-Data Statistics Map (RW15) - elevation issue

    You would typically create a 3D model by going to T-Data -> Model. The statistics map is really designed for the creation of a 2D grid, which can be displayed as a contour map in 2D, or as a flat grid in 3D. When you say that you want to use the "highest values only", what exactly do you mean? Do you mean that you only want to use measurements above a specific concentration, or do you only want to use data that is screened above a specific elevation? Best Regards, Alison
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