Create Linear Stratigraphy Sections with Projected Logs

RockWorks | Borehole Operations | Stratigraphy | Projected Section | Linear Correlations

Use this program to create a cross section in which stratigraphic layers are displayed with straight-line correlations between boreholes. This is a simple point to point correlation method, it is not surface model-based. Logs are projected onto the section panels. A variety of striplog and diagram options are available.

See also
     Modeled Projected Sections for grid-based cross sections with projected logs
     Stratigraphy Profiles for single-slice diagrams with projected logs

Feature Level: RockWorks Basic and higher

Menu Options
Step-by-Step Summary

Menu Options

• Rules & Filters: Use the buttons at the top of the window to apply filters and rules for this program. (More info)
  • Spatial Filter: Filter the input data for the stratigraphy section based on XYZ location and/or filter the data to be displayed in striplogs, if activated. Note that these tools filter the data that is passed to the diagram-generating procedures.
  • Time Filter: Filter any T-Data or Aquifer data in striplogs, if activated.
  • Stratigraphic Rules: Apply stratigraphy rules for correlations and striplogs, if activated.
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• 2D Log Design
  Click here to choose which data items are to be displayed in the logs, if activated via the Striplogs checkbox below, and in which order. See Using the 2D Log Designer and the Visible Item Summary.
  ! For Section diagrams, striplogs will be plotted vertically regardless of any non-vertical orientation.
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• Prosect Location
  Click on this button at the top of the window to draw, on a map display of your enabled boreholes, where the cross section panels are to be placed and how wide the projection swath should be. The most recent section drawn for this project will be displayed (More info)
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• Vertical Exaggeration
  Click here to pre-define the vertical stretch you would like to apply to your diagram. By giving the program this information in advance of generating the section, it can help with text and graphic sizing and placement. (More info.)
  ! Note that you can always change the vertical exaggeration at which the diagram is displayed, in the RockPlot2D window itself. But, by telling the program up-front how stretched it will be, you'll get better placement of the graphic components.
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• Stratigraphic Units
  Click on this tab to define which of your formations are to be included in the diagram. (More info)
  • All Stratigraphic Units: Choose this if all units are to be included in the section diagram.
  • Only Units Flagged As "Show In Legend": You can limit the diagram to only those formations with a check in the Show in Legend check-box, in the Stratigraphy Types table.
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• Correlation Style
  Click on this tab to define the panel fill options.
  • Style: Click the list box to choose the fill style:
    • Lines Only: Choose this option to plot straight lines connecting like formations in adjacent logs.
    • Patterns Only: Choose this option if you want the stratigraphic correlations to be drawn with lines, with the panels filled with formation patterns against a white background. The patterns are read from the Stratigraphy Types Table. The patterns are plotted in the background colors declared for the formations.
    • Colors Only: Choose this option for the stratigraphic correlation to be drawn with lines, with the panels filled with formation colors. The colors are defined in the current Stratigraphy Types Table as the background colors for the pattern blocks.
    • Patterns + Colors: Choose this for the stratigraphic correlations to be drawn with lines, with the panels filled with formation colors and patterns. The background colors, and the pattern design and colors are defined in the Stratigraphy Types Table.

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    • Label Contacts for Partially Defined Intervals: Check this box to include labels on correlation panels for inferred units, as established by the Strat Rules button at the top of the program window. (More info)
      • Font: Click this button to choose the font size, color, and angle.
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    • Correlation Extents (If Striplogs Visible): These settings determine how stratigraphic correlations will be plotted relative to the striplogs within the sections.
      • Edge to Edge: Log to log correlations connect the edges of the logs to one another.
        • Fill Region Behind Striplogs: Check this option if the correlations are to be displayed as horizontal lines behind the logs themselves.
      • Axis to Axis: Log to log correlations connect the axes of the logs to one another. This setting is used when correlating thin logs in which a horizontal fill within the logs themselves might be misleading from a structural standpoint.
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• Log Spacing
  Click this tab to determine how the logs will be placed in the section.
  • Distance between Collar Locations: This setting spaces the logs in the section relative to the distance between the boreholes. In this way, close boreholes are plotted close to each other, and distant holes far apart.
  • Uniform (Constant) Distance: This option allows you to specify that the logs be evenly spaced across the section. Declare the separation distance in your map units. Why would you select this option? Click here for more info.
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• Truncate: Check this box to limit the section diagram to a specific elevation range. For example, if you have stratigraphic data from -1000 to -3500 (subsea) feet in elevation, but you only want to see the units from -2000 to -2500, you would enter "-2000" for the top elevation and "-2500" for the base.
  ! This setting clips the stratigraphy panels only. Clipping of striplogs is done separately, see the Clip setting under Striplogs, below.
  • Top Elevation: Click here to type in the uppermost elevation to include in the section.
  • Base Elevation: Click here to type in the lowermost elevation to include in the section.
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• Striplogs
  Check this item to include 2D logs with the stratigraphy section display. Click the 2D Log Design button at the top of the window to set up how you want the logs to look. Click on this tab to establish some additional striplog settings.
  • Use True Vertical Depth: Check this box if you have deviated holes and want them to be plotted in the section using true vertical depth rather than measured depth.
  • Clip: Check this box if you want to display a subset of the log data. Click on the tab to define the elevation range to be displayed.
    • Top Elevation: Enter the uppermost elevation to be displayed in the logs.
    • Base Elevation: Enter the lowermost elevation to be displayed in the logs.
      ! Log clipping parameters are defined using elevations, not depths. (More info.)
  • Save Log List: Check this to save to a text file the names of the boreholes that are included with the section diagram.
    • File in which to store the Log List: Enter the name for the log list text file.
    • Display List Upon Completion: Check this to display the text list in Notepad (or equivalent) after the diagram is completed.
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  • Collar Distances: Check this box to display at the top of the section a series of labels that represents each borehole's distance to the section line. (More info)
• Annotation
  Click on this tab to establish title, border, axis labels, and other perimeter settings for the section. (More info.)

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• Surface Profile
  Check this box to include a polyline on the section diagram that represents a user-selected elevation grid model, such as a water level surface.
  Click on this tab to access the surface profile options.
  • Grid Model: Browse for the name of the existing grid model (.RwGrd file) to be represented in the polyline.
  • Polyline Attributes: Click this tab to establish the line settings. (More info.)

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• Faults
  Check this box if you want to display lines in the output diagram where the cross section panels intersect the fault(s) defined in the Faults program tab.
  Click on this tab to set up the fault lines. (More info.)

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• Infrastructure
  Check this box to display buildings, pipes, or other infrastructure with your cross section.
  Click this tab to define the infrastructure file and plot settings. (More info)

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• Peripherals
  Check this option to include various peripheral annotations with your diagram. Options include titles, text blocks, pattern legends, and more.
  Click on this tab to activate the items and establish their settings. (More info)
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• Other 2D Files
  Check this option to include existing RockWorks diagrams as layers with your stratigraphy cross section.
  Click on this tab to select the existing diagrams (.Rw2D files) to be included. (More info)
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• Border
  Check this option to include a solid line border around the entire cross section image.
  Click on this tab to establish border settings.
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• Location Map
  Check this box to create, along with the cross section, a reference map that shows the section's location. It can be embedded in or created separately from the cross section.
  Click on this tab to establish the map options. (More info.)

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Step-by-Step Summary

Follow these steps to create a 2-dimensional multi-panel section of the project's stratigraphy with linear correlations, with logs projected perpendicularly onto the panels:

1. Access the RockWorks Borehole Manager program tab.
2. Enter/import your data into the Borehole Manager database, if you have not already. This tool specifically reads location, orientation (if any), and stratigraphy data.
3. Enable boreholes: Be sure that all boreholes whose data are to be included in the cross section are enabled.
4. Select the Borehole Operations | Stratigraphy | Projected Section | Linear Correlations menu option.
5. Enter the requested program settings, described above
6. Set up logs: If you are including logs with the section, be sure to click on the 2D Log Design button at the top of the window to establish how you want the logs to look. (More info)
7. Pick the section: Be sure to click on the ProSect Location button at the top of the window to establish the section location and the "swath" distance to either side, within which borehole logs will be included in the diagram. (More info)
8. Click on the Continue button to proceed.

   RockWorks will create the cross section diagram, using the selected fill. If Striplogs were requested, they will be projected onto the panels within the selected swath. Other layers will be added as requested. The diagram will be displayed in a RockPlot2D tab in the Options window, if requested.

9. You can adjust any of the program settings in the Options tab and then click the Continue button again to regenerate the section.
10. View / save / manipulate / print / export the diagram in the RockPlot2D window.

Tips

• Use the Stretch button in RockPlot to fill the window with the cross section. This is helpful if it is long and shallow.
• If the diagram looks better with a vertical exaggeration greater than or less than 1, you can pre-define this in the Vertical Exaggeration tab in the options list and then recreate the diagram; this will generate better-looking axis annotations.

See also

• Adding this program to your Playlist
• Adding this program to your Favorites
• Save/load/view menu settings
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Back to Stratigraphy Menu Summary

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