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Alison

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Everything posted by Alison

  1. I don't know of any tools that can handle CO2 in a methane hydrate reservoir. I would suggest that you contact the authors of TOUGH+/HDYRATE to see if they have any new simulators that might work for you. Best Regards, Alison
  2. Problem export to JPG image

    Thank you for reporting this. Our programmer is working on this problem now, and we should have a new build posted on our website within a day or two. If this is urgent and you need a fix for this more quickly than this, please contact me directly and we can arrange to send this to you more quickly. Thanks, Alison Alison @ rockware. com
  3. 3D I data logs how's to plot with inclination

    I'm able to get the I-Data in the Samples project installed with the program to plot correctly, so it sounds like this might be a problem specific to your project. What version of RockWorks are you using? First, please go to Edit/ Calculate XYZ values for all Boreholes. It’s possible that the xyz values in the I-Data table were not calculated correctly. If you continue to have problems, please back up your project through the File menu, and send the zip file created during the backup process to tech @ rockware. com. This backup file includes the database and your menu settings. Hopefully we'll be able to diagnose the problem by taking a look at these files. Best Regards, Alison
  4. 3d lithology model - exploded view?

    The diagram you've included looks more like a stratigraphy model than a lithology model. A stratigraphy model is composed of stacked gridded surfaces that can be displayed like this. Because lithology models are composed of block models, there isn't an easy option to display the block model as surfaces dividing the various material types. I can think of a couple of solutions for you: If your lithology can actually be modeled as stratigraphy, you might try transferring the data to the stratigraphy table and creating a stratigraphy model. This would require that your lithology be fairly simple and meet the following requirements: Each stratigraphy unit can only be listed once in each borehole. The stratigraphic units must fall in the same order in each borehole. You also might be able to use the Lithology / Superface tool to create gridded surfaces representing the tops of various material types in the lithology model. These 3D surfaces can be saved as R3DXML files and appended to a view of your 3D boreholes. This would also really require that you have fairly discrete layers within your lithology model. It’s hard to know how either of these options would work without seeing your data. If you would like us to take a look, feel free to contact us at [email protected] rockware.com to arrange for this. Best Regards, Alison
  5. Leakage modeling in CO2 storage

    It is very hard to speculate about what the problem is without know more details about the model. Do you get a specific error in the output file when the model ends? You can equilibrate a model to hydrostatic pressure, and then load the SAVE file for that model as initial conditions in a new model with identical model geometry. This topic is covered on page 63 of the PetraSim Manual, and in many of the example problems. I would recommend that you take a look at the "Initial State and Production Analyses in a Layered Model" for an example of how this work. If you continue to have problems, you are welcome to send your SIM file to [email protected] rockware.com. Thanks, Alison
  6. I don't have a good explanation of this, although it sounds vaguely familiar. You might try posting this on the LBNL TOUGHREACT forum to see if they have any suggestions. You are also welcome to send me your SIM file, and I will take a look. Best Regards, Alison
  7. Are you displaying these surfaces in 2D or 3D? I'll give you some suggestions for 3D diagrams below. If you are working with 2D diagrams, I can respond with more suggestions. One idea would be to simply change the color you’ve assigned to the Aquifer in the Aquifer Types table before creating each surface. This can be accessed in the Project Manager on the left side of the screen under the “Borehole Database” category You can change the color of a surface in RockPlot3D pretty easily as well. To do this, expand the Aquifer Model in the data tree, and drill down to the actual grid that you’d like to modify. Right click on the grid and choose Options. In the resulting Window, you can change the color of the surface. See the attached image for some more details on this. Which option you choose really depends on whether you are modeling saturated intervals that have some thickness, or if you are just looking at a single surface for each time step. If you are modeling an actual interval that has thickness, then the program will be plotting side panels for each time step as well, and the colors of these side panels can’t be edited in RockPlot3D. If this is the case, I would go with option 1.
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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)
  13. 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.
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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.
  19. 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
  20. 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.
  21. 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
  22. 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.
  23. 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.
  24. 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)
  25. 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
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