Constraining a Grid Model by Another Grid

RockWorks | Utilities | Grid | Filters | Limit

This Utilities filter is used to compare the z-value of each node of an existing grid model to the corresponding node in another ("comparison") grid model, and to re-assign low or high nodes to the values in the comparison grid. In this manner, you can, for example, constrain a stratigraphic surface to another stratigraphic layer, or to the ground surface.  You can invoke either a low-stop or a high-stop filter.

! This tool requires that both grid models already exist and that they have the same dimensions and node spacing (use Grid | Statistics | Report if you need to check their dimensions).  See Resampling Grid Models if you need to re-dimension an .RwGrd file.

Menu Options
Step-by-Step Summary


Menu Options

Step-by-Step Summary

  1. Be sure you have two real number RockWorks grid models already created, for input into this program.  Be sure, also, that they have the same dimensions and node counts.
  2. Access the RockWorks Utilities program tab so that the Grid menu is visible.
  3. If you'll be creating a 2D map with sample location (well) symbols, you can use the File | Open option to open the .RwDat file containing the X and Y location coordinates for the map symbols. 
  4. Select the Grid | Filters | Limit menu option.
  5. Enter the requested menu settings, described above.
  6. Click the Process button to continue.

The program will read the Z values in reference Grid B.  It will then read each corresponding node value in source Grid A and compare.  Node values that exceed Grid B's will be re-assigned Grid B's values (if High-Stop was selected).  Grid A node values that are less than those in Grid B will be assigned Grid B's values, if Low-Stop was selected.  The resulting model will be stored on disk under the output grid file name.  

The requested diagram(s) will be displayed in a RockPlot2D tab and/or RockPlot3D tab in the Options window.   If you requested a statistics report, it will be displayed in a Text Tab in the Options window.

  1. You can adjust any of the settings in the Options window and then click the Process button again to regenerate the diagram(s).
    ! Each time you click the Process button, the existing display(s) will be replaced. 
     
  2. View / save / manipulate / export / print the diagram in the RockPlot2D or RockPlot3D window. 
     

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