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Alison

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Everything posted by Alison

  1. Saeid, It is not possible to apply MINC only to certain cells in a model. You might consider using the same materials for both matrix and fractures in areas where you don't want to simulate fracture flow. Best Regards, Alison
  2. How to increase the grid blocks?

    TOUGH2 currently allows for 5 spaces for the element name in the ECO2M input file. Because we've chosen to use numbers to represent element names, you are limited to this number of elements in a model. We are considering switching to an alphanumeric number scheme in PetraSim 6, so that larger models can be created. Feel free to respond with additional questions. Best Regards, Alison
  3. Seth, I can think of a couple of options: 1. Plot a contour map of the polygon. Perhaps a contour line for a very low concentration can be converted to a polygon table (if it is drawn as a closed polygon in RockPlot2D). To do this, select the contour line with your mouse, right click, and choose "Save to Polygon Table". 2. If this doesn't work, then you can draw a polygon on the map that covers the extents of the plume. Then, select that drawn polygon, right click, and choose "Save to Polygon Table". Once you've created a Polygon Table, it can be used to clip your solid model in the Solid Modeling Options window. Please let me know if you have other questions. Thanks, Alison
  4. Resource Status maps

    These levels are typically based on distance qualifications that are input by the user, for example Proven reserves might be within 50m of an assay interval, Probable reserves within 100m and Inferred within 200m. How you create this type of map really depends on whether you are doing 2 dimensional or 3D dimensional reserve estimates, and whether your boreholes are vertical or non-vertical. If you could tell me what menu item you are using for the reserve estimate (I-Data Volumetrics? Solid Extract Solid?), I’d be happy to send you some instructions. Thanks, Alison
  5. This typically means that the model has reached a state not supported by the simulator (for example, a very high pressure or a very low temperature). You might try starting out with a smaller time step to see if that resolves the problem, and you should also be sure that you are not injecting fluid or gas with an inappropriate enthalpy into a non-isothermal model. If these suggestions do not help, please feel free to send me your SIM file and I'll let you know if I see any problems with the model. Best Regards, Alison (Alison @rockware.com)
  6. Another option would be for you to convert the Surfer grids to RockWorks grids (as Tom has mentioned above), and then rename the grids so that they mimic grids created through the Borehole Manager Stratigraphy menu. You can then create cross-sections based on arbitrary locations within the project. To do this, you would want a grid for the top and the base of each stratigraphic unit listed in the Stratigraphy Types Table. For example, if you have two units in the Stratigraphy Types Table called UnitA and UnitB, you would have four grids in the project directory titled: UnitA_Top.grd UnitA_Base.grd UnitB_Top.grd UnitB_Base.grd Then, when you choose to create a stratigraphic diagram, such as a cross-section, through the Stratigraphy menu in the Borehole Manager, be sure that the “Interpolate Surfaced” option is checked OFF. The program will use the appropriately named grids in the project directly to construct the diagram.
  7. Using AOI in Rockwork???

    A shapefile can be imported into a blank RockPlot2D window (accessible through the Window menu) by going to File -> Import -> SHP. Once the polygon is imported, select it with your mouse, right click, and choose “Save to Polygon Table”. You can then use this polygon table to clip your Lithology solid model using the Solid -> Filters -> Polygon clip tool in the RockWorks Utilities. Please let me know if you have additional questions. Best Regards, Alison
  8. I would recommend that you put together a list of xyz values that define points along the new slope surface, and use triangulation to construct the surface. This is probably most easily done through the Map --> Grid-Base Map menu in the Utilities. If you can define a point along the new slope, along with a strike and dip, a planar surface can also be created through the Grid --> Initialize menu (also in the Utilities). Please let me know if you have any questions about this. Best Regards, Alison
  9. Load cell flow rates

    Good idea! The well might be a better solution than using the cell flow rates, but here is a description of the format just in case. I'm sorry that this is not well documented. Cell production and injection rates will be read from a file with a specific format. You can design the file in an Excel file that looks like the attached image, and then save the files as a TXT file from Excel for import into the program. The first line gives names of the cells. These names must also be defined as cell names in the model. Note that these are different than the cell numbers. You’ll have to name each cell that you want included in this file, which could be cumbersome in the interface depending on how many cells are in the boundary that you are trying to define. Adding wells through each column of cells might be a way of auto-naming the cells. The second line gives the boundary type (MASS for production, COM1 for injection and HEAT for heat) for each cell. The following lines each contain a time followed by pairs of data for each cell. MASS - production cells will include a flow rate for the first value and 0 for the second value. COM1 – injection cells should be assigned both flow rate and enthalpy HEAT – heat cells should be assigned a heat rate in the first cell and a value of 0 in the second If you have problems with this, you are welcome to send me your flow rates file and SIM file so that I can trouble shoot this. My email address is alison @rockware.com
  10. The grid editor was used in PetraSim v4.2. It was phased out in version 5 and replaced with full 3D support. If you have question about how to reproduce a specific example, please let me know. Best Regards, Alison
  11. custom relperm

    This option was added to the program so a user could write out entirely customized relative permeability parameters without having to edit the input file manually. It is only useful if you have a customized executable that includes a relative permeability curve.
  12. Model 2 parameters at the same time?

    Mira, While a block model can only represent a single parameter, you can certainly view two models in the same RockPlot3D diagram. To do this: 1. Create a view of one model and save the view in RockPlot3D (which will save save a view of the MOD file in an R3DXML file). 2. View the second model in RockPlot3D, and go to File Append. 3. Choose the R3DXML created previously. This should combine the two views into a single window. Feel free to respond with additional questions. Best Regards, Alison
  13. AQQA International Options

    I've experimented a bit, and even with my windows number settings set to Italian (so that a comma represents a decimal place), AqQA will only accept a period as a decimal place. Unfortunately, it looks like you will have to modify your data to use periods.
  14. AQQA Hardness unit

    Unfortunately, this hardness unit is not supported in AqQA. The following units are supported: - mg/kg - mg/L - mmol/L Best Regards, Alison
  15. Its hard to know what the problem is without looking at your model. You are welcome to send it to Alison @rockware.com so that I can take a look. It sounds like the model is reaching a physical state not supported by the simulator, so you might try printing out some additional time steps to see if you can see any unusual trends in the results.
  16. I just wanted to post an update to the forum on this. It turns out that the sources in the model had an enthalpy of 0, which was causing very low temperatures in a non-isothermal model.
  17. AqQA symbol issue

    I've tried exporting an EMF from AqQA and sending it to myself through both Google and Hotmail. In both cases, the image loaded fine in Word by going to Insert --> Picture. If you could send me your EMF, I'd be happy to try loading it into Word on my machine to see if we can reproduce the problem that way. Thanks, Alison (alison @rockware.com)
  18. Unfortunately, it’s very hard to speculate about what the problem could be without more details. Most likely, the model is reaching some sort of physical state not supported by the simulator (for example, a very high pressure or a very low temperature). If you take a look at the output file, you might be able to determine in which cell the model is failing. You can then make that cell a print cell so that you can see more details in a cell history plot. Does the inclusion of the less permeable layer seem to be the culprit, or do you run into a similar error without that layer included in the model? You are welcome to send me your SIM file for review at alison @rockware.com. Best Regards, Alison
  19. Because this is really more of a TOUGHREACT question than one related to PetraSim, please post this on LBNLs new support forum: http:// tough.forumbee.com Thanks, Alison
  20. CANNOT FIND PARAMETERS AT ELEMENT

    You may need to add pore compressibility to your model (or pore expansivity). If you are using PetraSim and would like to send me your SIM file, I would be happy to take a look (Alison @rockware.com). Thanks, Alison
  21. Intersect well bore with Solid Model

    Hi Julia, If you can come up with a list of XYZ locations along the well trajectory, you can use the Solid --> Statistics --> Residuals tool to get a list of model values at the know XYZ points. This program is really designed to calculate the difference between measured and modeled values, so you'll have to populate a 4th column with ficitiious data (such as 0s) to get the program to work. Please let us know if you have any more questions. Best Regards, Alison
  22. Help!

    I would recommend that you include the elevation in the name of the extracted grids and ASCII file. I do not know what the work flow would be for you to import this type of information in to VMOD Flex. I would recommend that you first contact Schlumberger technical support to see how they would recommend you import this type of lithology data into a model. The software may include import options other than a layer by layer import.
  23. Help!

    Terry, In the paper you've referenced, I believe that the user extracted horizontal slices from the solid model as GRD files through the Solid --> Convert --> Extract Grid tool in the RockWorks Utilities. He then probably exported each grid as an ASCII XYZ file (where Z represents material type) through the Grid --> Export menu item. It is important to note that he kept the xy spacing for his MODFLOW model exactly the same as his lithology model, which made the data import into Groundwater Vistas very easy. I don't know exactly how you would go about doing this in GMS. There may be a similar process that you could follow. I would recommend that you contact AquaVeo technical support and explain that you have lithology data that you’ve like to import into a MODFLOW model. Once you’ve determined which format is needed for this specific product, we can tell you how to go about reproducing this format from RockWorks. Best Regards, Alison
  24. Help!

    Terry, Without seeing the full article, and knowing which MODFLOW interface this person was using, its hard to know exactly how he got the lithology data into the MODFLOW model. If you want to contact me directly with a copy of the article, or additional information, I may be able to help you further. My email address is alison @rockware.com. Thanks, Alison
  25. Help!

    Terry, Molly is correct that typically, stratigraphic grids are exported as ASCII files and imported into MODFLOW models as layer boundaries. However, if you do want to get actual lithology values into a MODFLOW model, then you can export a list of xyz and lithology G-values through the Solid -> Export to ascii menu option. If your MODFLOW model has the same spacing and layer thickness as your MODFLOW model, then there is probably a way to get it into your MODFLOW model (you would need to contact GMS technical support for more information about how to populate a model with lithology data). If you have a list of xyz values for the cells in your MODFLOW model, you can get the lithology g-value for the closest cell to each point using the Solid -> Statistics -> Residuals tool in the Utilities. This will require that you populate a 4th column with fictitious values (I would recommend 0s) to use for the G(observed) input column. Please let us know if you have additional questions. Thanks, Alison
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