Computing Stratigraphy Volumes from Grid Models

RockWorks | Borehole Manager | Stratigraphy | Volumetrics (Based on Grid Models)

This program creates a tabular report by computing the total volume or mass for each formation as a function of the relative depth/elevation, computed from a stratigraphy model built from grid surfaces. 

! This program requires that you have already created the stratigraphy model (and the component grid models), to be used for the computations.

See also: Volumetrics - Based on Solid Models for computations based on a stratigraphic solid model.

Feature Level: RockWorks Standard and higher

Menu Options
Step-by-Step Summary

Menu Options

• Intervals:  These settings will define for the program the total elevation range and the sampling intervals for the volume report. These are defined in your output units.
• • Top Elevation: Enter here the uppermost elevation to be included in the report.
  • Base Elevation:  Enter here the lowermost elevation to be included in the report.
  • Interval:  Enter here the sampling interval for the volume report.  For example, if you enter "25", volume summaries will be generated every 25 feet from the top elevation to the base.  If you enter "10", volume summaries would be generated every 10 feet from the top to the base.
    
• Output Options:  Expand this heading to define what type of results will be included within the report.
  • Volume: Results will be reported in the cubic units you've defined in your Output Dimensions.
  • Mass:  Computations are based on the Density value declared in the current Stratigraphy Types Table which declare mass per cubic unit.
    
• Decimals:  Click on this item to specify the number of decimal places to be represented in the depth intervals in the report, and the volume or mass computations.  Be sure this is adequate to represent your layers: if you've requested an Interval of 2.5 feet and you choose 0 decimal places, it will be difficult to discern the report's interval groupings.

Step-by-Step Summary

1. Access the RockWorks Borehole Manager program tab.
2. If necessary, access the project folder containing the data to processed.
3. If necessary, create the stratigraphic model for which the volumes are to be computed. 
   ! This volume tool will not first create the stratigraphy model - it assumes the formation surfaces have already been interpolated and that they comply with the expected naming procedure.
4. Select the Stratigraphy | Volumetrics (Based on Grid Models) menu option.
5. Enter the menu settings as described above.
6. Click the Process button to proceed.

The program will load the stratigraphic surfaces, and determine the formations and compute their volume and/or mass for each requested interval.  The resulting table will be displayed in a Data Tab in the Options window.

7. You can adjust any of the options (spacing, etc.) and then click the Process button again to regenerate the report.
   ! Each time you click the Process button, the existing report will be replaced.

The following examples illustrate volume reports at 25-foot and 10-foot intervals.

  Back to Stratigraphy Menu Summary

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