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  1. Last week
  2. Importing DEM

    Hi Katherine, Using UTM or State Plane is better than decimal degrees for vertical plot scaling, distance, area, and volume calculation. Regards, Tom B RockWare Inc
  3. Importing DEM

    Thank you Tom! Is there a reason that I don’t want to leave it in decimal degree? Is it better to use a UTM coordinate system? Thanks again for all of your help. Katherine
  4. Importing DEM

    Hi Kat, Thanks for sending the files. DEM.txt has the format: ELEV_M <tab> LONG <tab> LAT Import this file into the RockWorks Utilities datasheet. Right-click on the gray column headers to define DEPTH as Z meters and LONG and LAT as X or Y Decimal Degrees. Convert the Lat/Long to your project coordinate system, e.g. UTM Zone 13 m. Scan the datasheet to change the project dimensions if needed. Use the Map | Grid-Based Map menu to make a RockWorks RwGrd file and 2D and 3D maps. PA_069418005_POINTGRID_ZOOM.txt has the format: OBJECTID <tab> pointid <tab> grid_code <tab> ELEV_FT <tab> ELEV_M <tab> LONG <tab> LAT Follow the instructions above to get a RockWorks RwGrd file. Regards, Tom B RockWare Inc
  5. Importing DEM

    Hi Kahn, It sounds like your DEM is not in the specified DEM format. You are welcome to send your file to [email protected] and we'll take a look to see if we can identify the format and recommend a conversion procedure. Include the Input Format that you select, and any information you have about your file. Regards, Tom B RockWare Inc
  6. I am trying to import a DEM into utilities so that I can create a surface and pull a cross section from it. I keep trying to import the txt file and get the error “ is not a valid integer value. I have searched the text and don’t see “ anywhere in the document. Any ideas?
  7. CO2TAB file in ECO2N

    ECO2N V.1.0 (Pruess, 2005, ECO2N: A TOUGH2 Fluid Property Module for Mixtures of Water, NaCl, and CO2) was developed primarily to simulate the geologic CO2 disposal in sedimentary environments at temperatures below 110°C. The EOS uses a slightly modified version of the phase equilibria developed by Spycher and Pruess (2005) for H2O-NaCl-CO2 mixtures. The approach followed for the phase equilibria, which gives the mutual solubilities of CO2 in the aqueous phase and of H2O in the CO2-rich non-aqueous phase, cannot be used at higher temperatures. Thus, simply extending the temperature range of CO2TAB file is not enough to perform reliable simulations of CO2 injection in EGS. ECO2N V.2 (Pan et al., 2015, ECO2N V2.0: A TOUGH2 Fluid Property Module for Mixtures of Water, NaCl, and CO2) has been developed for these applications. Alfredo
  8. My previous post was not entirely correct: ECO2 and ECO2N actually use XS (=XSM) as the mass fraction of NaCl in the binary mixture H2O-NaCl. Alfredo
  9. The primary variable Xsm is used in the EWASG EOS module. Depending on its value, it can be (see the TOUGH2 V.2.0 user's guide (Pruess et al., 1999) pag. 55-56): - XS, the mass fraction of NaCl in the aqueous phase (0-1); - SS+10, the solid salt saturation (10-11). With the same meaning Xsm is also used in the old ECO2 and in ECO2N. Starting with Petrasim 2017, in EWASG XS can be the mass fraction of NaCl in either the aqueous or gas phase, as the very small solubility of salt in the water vapor is accounted for. In practice: XS = kg NaCl over kg solution, that is kg of NaCl+water+NCG. Alfredo
  10. Citing RockWorks

    Hi Ehsan, Usually the journal where the paper is published has a style guide, but here is an example from the web page "How to Cite Software APA Style" and the nova.edu page "How to Cite Sources: APA Style". Regards, Tom B RockWare Inc. RockWorks17 (Revision 2019.7.30) [Software]. 2019. Golden CO USA: RockWare, Inc. Available from https://www.rockware.com/product/rockworks/ RockWorks17 (Revision 2019.7.30) [Software Help Files]. 2019. Golden CO USA: RockWare, Inc. https://help.rockware.com/rockworks17/WebHelp/introduction.htm
  11. Citing RockWorks

    Hi There, How can we properly cite RockWorks software package in our papers? What about the software Help? Best, Ehsan
  12. Earlier
  13. How to calculate the mechanical dispersion

    TOUGH2 (Pruess et al., 1999) does not simulate the mechanical dispersion. It simulates just the molecular diffusion. Full hydrodynamic dispersion is simulated by TOUGH2 in 2D cartesian geometries by coupling the T2DM module (Oldenburg C.M e Pruess K. (1993). A two-dimensional dispersion module for the TOUGH2 simulator. Earth Sci. Div., Lawrence Berkeley National Laboratory report LBL-32505, Berkeley, CA.) Full hydrodynamic dispersion can be simulated in 3D non structured grids by a special version of TOUGH2 called T2R3D (Wu Y-S, Pruess K. (2000). Numerical simulation of non-isothermal multiphase tracer transport in heterogeneous fractured porous media. Adv. in Water Resour., 699-723.) For a cartesian grid, for which the IFD method is equivalent to the finite difference method, the numerical dispersion induced by the space discretization is equivalent to the mechanical dispersion for which the longitudinal dispersion coefficient is half of grid spacing (Bear, 1979). Emulating the mechanical dispersion with grid spacing can work only for very simple cartesian grid geometries. Alfredo
  14. MINC can be used to simulate nested media with different properties, not necessarily only fractures surrounding matrix blocks. An example of that is the use of MINC described by Falta R.W. (2000). Numerical modeling of kinetic interphase mass transfer during air sparging. Water Resources Research, 36, 12, p. 3391-3400. Alfredo
  15. Effective or Total Porosity in TOUGH2 EOS1

    TOUGH2 (Pruess et al., 1999) does not distinguish between 'total' and 'effective' porosity. A look to the way the mass balance equations are written shows that 'total' porosity is used. I was working with an in-house version of TOUGH2 to simulate the waterflooding (with a polymer) in oil reservoirs, and we had the need to account for a fraction of the pore volume which is not directy displaced by the injected fluid. Actually, we wanted to simulate that a fraction of the water saturation (the connate water saturation) was not displaced by the polymer solution. We tested two different approaches: 1. use a dead pore volume approach, following what is done in ECLIPSE by Schlumberger. The accumulation term for the polymer was modified as shown below. , where Sdpv is the dead pore volume water saturation. 2. use a MINC approach with 2 nested media. The internal one was emulating the fraction of pore volume not directly accessible to the injected fluid, actually that containing the connate water. The other was representing the effective porosity. The approach was inspired to the work by Falta (2000) Numerical modeling of kinetic interphase mass transfer during air sparging. Water Resources Research, 36, 12, p. 3391-3400. By a proper choice of model parameters, the two approaches were equivalent as far as the transport of polymer is concerned. Of course the MINC approach makes directly inaccessible the 'connate' water to all the mass components simulated. The first approach requires the modification of source code. The second one can be used with the standard TOUGH2 version, but requires the doubling of the element number. Alfredo
  16. Horizontal scaling of 2D StripLog section

    Hi Jan, To prevent the logs from overlapping, decrease the width of the columns in the 2D Striplog Designer Column Layout for each item or change the Borehole Spacing to Uniform (Constant) Distance. Regards, Tom B
  17. What TOUGH2 does not like is to solve the mass balance of a component which is not present at all in a grid block. For this reason initializing a non zero mass fraction of water 2 allows to proceed with the simulation. Actually, initial concentrations much lower than 0.01 can be succesfully used. Again, in case of injection (sources), if pure water is injected for long times the mass fraction of water 2 can be reduced to 0. All sources should not inject just water, but also a tiny fraction of water 2, adding an additional source. This problem is in principle present in all the EOS with more than just one component. Alfredo
  18. Hello everyone, I'm kind of a novice RockWorks user, working with a coring database of c. 250 shallow (<10 m) cores. When I try to create a 'true-distance' striplog of c. 40 cores over a length of c. 6 km, I found all my cores plotted overlapping each other as illustrated in the example image. I'm sure I'm overlooking a certain setting to set the horizontal x-axis scale. When I draw only a part of the section, e.g. with a length of 1 km, all cores plot just fine. It is perhaps good to mention that I'm currently working on a 13" laptop - not ideal, but is it possible that this issue is caused by my screen-size? Hopefully one you guys or girls can help me out with this. All help and suggestions are much appreciated! Best regards, Jan Rockplot - untitled.pdf
  19. New versions of RockWorks17 (64- and 32-bit) were uploaded to the RockWare website today, with the following changes: Improvement RockPlot2D Color Legends using a table now have margins and text placement that more closely match the continuous color schemes. Bug Fixes Null values were rendered transparent when the object was using a color table. RockPlot2D Color Legends using a color table weren't leaving a margin. The RockWorks Revision History has a complete list, by date, of these changes since the last update. To download this build, use the Help | Check for Updates menu inside RockWorks17. Or visit our website and click on the RockWorks Free Trial tab: https://www.rockware.com/product/rockworks/#tab-product_inquire_form_1494_tab where you can download the installation program and install the new build right over the top of the existing program. (DO NOT uninstall first.) Note that you will not be able to use this new build of the program if your maintenance has expired before July 2019. Contact RockWare Sales or visit our Customer Portal (https://www.rockware.com/customer/) if you would like to update your maintenance. Molly Mayfield RockWare Inc
  20. LogPlot8 2019.7.31

    New versions of LogPlot8 (32-bit and 64-bit) were uploaded to the RockWare website today with the following changes: Bug Fixes Lithology Description margins cannot now be less than 0 since they cause offset lines outside of the column. Comments in Lithology Descriptions could plot the wrong text if an interval had nothing to plot. Lines in Curves and CrossPlots can now exceed 32000 points. Lithology Description comments with no text were causing comments to be plotted at the wrong depth. Vertical body lines were being shortened if the Lithology Description stopped short of the Total Depth. For a complete list of recent changes, please visit: https://www.rockware.com/rockworks/revisions/current_logplot_revisions.htm To download this build, use the Help | Check for Updates menu inside LogPlot8. Or visit the LogPlot Free Trial tab (https://www.rockware.com/product/logplot/) where you can download the installation program and install the new build right over the top of the existing program. (DO NOT UNINSTALL first.) Note that you will not be able to use this new build of the program if your maintenance has expired. If you would like to renew your maintenance, contact RockWare Sales or visit our Customer Portal (https://www.rockware.com/customer) and either create a new account (new visitors) or log in with your existing account. Molly Mayfield RockWare Inc
  21. Ternary Diagrams

    That worked. Thanks!
  22. Ternary Diagrams

    Hi Alison, It looks like your cell size is pretty big, resulting in a low resolution grid of about 10 cells in each direction. I used a cell spacing of 10, resulting in 101 cells in the X direction and 87 cells in the Y direction. . Compare contour maps with different grid cell spacing / size / number. Regards, Tom B RockWare Inc
  23. Ternary Diagrams

    Thanks, Tom! When I try this the grid doesn't clip entirely within the polygon (see attached). I used the null value under Filter type/Exterior and I used the triangle vertices to build the polygon. Is this a gridding algorithm issue or something else? Allison plasticity ternary_w contours.Rw2D
  24. Ternary Diagrams

    Hi Allison, To contour the Plasticity values in your ternary diagram, Digitize the points XY locations on the diagram and copy to the Utilities datasheet. Create a grid and contour map. Draw a polygon that matches the triangle axes on the ternary plot. Click on it to select it, then right-click and Save to Polygon Table. In Utilities, choose the Grid | Filters | Polygon Clip menu command and replace the values outside the triangle with NULL values. Overlay the ternary plot axes and points as needed. Regards, Tom B RockWare Inc
  25. Ternary Diagrams

    Okay, so I thought that RW would contour the data but its contouring the data point density. Is there a means of contouring the chemical data so that the output would look something like the attached? Boron in Tailings Mixture Design 07-16-19.pptx
  26. Ternary Diagrams

    Trying to contour a ternary diagram and contours don't match the Z values posted in the data file. Legend shows weird range of numbers that don't match data file. Granted, I only have four data points. Attached are the data file and the 2D output. The data is related to geotechnical testing (plasticity) of filter cake using percentages of beneficiation, digestion and lime mud Is there anything I can do to get better contours? filter cake_plasticity.rwdat Jadar tailings_plasticity ternary_w contours.Rw2D
  27. Singular Matrix in Chemical Solver

    This is a TOUGHREACT error that indicates a "poorly defined chemical system". Typically, you would want to create a model in a separate program such as PHREEQC or GWV that defines minerals and water chemistry in equilibrium. You can then bring that into a TOUGHREACT model as initial conditions. Best Regards, Alison
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