Tutorial: Run a Stratigraphy Volume Report

Estimated time: 1 minute.

Finally, let’s run a quick volume report for the stratigraphic layers. The computed totals will be displayed in a data tab.

We assume that you have gone through the Stratigraphy Model lesson, and in that lesson created a solid model of the layers, saved in a file "stratigraphy.RwMod" for volume computation.

1. At the Borehole Manager, choose the Stratigraphy|Volumetrics (Based on Solid Model) option.
    
2. Stratigraphy Model: Click here to browse for your model, named stratigraphy.RwMod.
    
3. Output Options:
   • Nodes: Uncheck this.
   • Volume: Check this.
   • Mass: Uncheck this.
   • Percent: Check this.
      
4. Intervals:
   • Every Layer.
      
5. Decimals: This can be set to 0.
    
6. Click Process to continue.
   
   The program will create a data tab where it will display the total volume for each defined formation at every layer in the solid model. It will also display percent of that type for that layer. If you scroll down to the bottom of the data listing, the overall totals will be displayed.
    
7. To save this datasheet, click on the File | Save option at the top of the window, and type in the name:  stratigraphy volumes    and click Save. The program will append the ".RwDat" file name extension automatically. These are files that you can open into the RockWorks Utilities datasheet.
    
8. If the RockPlot3D window containing your stratigraphic model is still open, you can compare the volume notations there with those in the datasheet.  They'll likely be different because they represent different methods of computing volumes.  The surface-based volumes, as displayed in the RockPlot3D window, are probably the more accurate since they are slightly less dependent on the resolution of the models as is the solid-based volume report.
    
9. If you have a moment, you can return to the main menu and run the Stratigraphy | Volumetrics (Based on Surface Models) option, to compare the calculations.  Generally, the volumes computed for the surface-based model will be more accurate than the volumes computed for the solid-based model.

This is the end of the tutorial for stratigraphy data. The next section contains lessons for downhole interval-sampled data.

Computing Stratigraphy Volumes
 

  Back to Stratigraphy menu     |     Next (I-Data Diagrams) 

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