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Geoscience > Main Launcher > Fault Menu > Polygons/Contacts

Fault Polygons/Contacts

Use the Fault Polygons/Contacts application to generate fault polygons based on horizon/fault contacts. You can these use these polygons in gridding. Alternatively, just generate the contacts.  This useful after importing a project from another package that will not contain contacts.

ClosedHow do I generate a fault polygon?

  1. Select a fault from the Faults list to be used to generate the polygon.

  2. Select the intersecting horizon from the Horizons list. Note: The resulting polygon is drawn with map node points existing at the intersection points between the two (horizon/fault contacts). The result can also be edited using the Culture Editor.

  3. Select the lines from the Lines list over which the fault and horizon (where horizon/fault contacts) exist.

  4. Set the Horizon Intersection Parameters.

  5. In the Parameters Section, turn on the Generate Polygons. Optionally turn on Automatically Extend Polygons and Generate downthrow symbol.

  6. Set the Layer Properties. Note: If you are using these polygons for gridding and contour, select Generate a closed polygon.

  7. Click  to generate the polygon.

The polygon will be drawn on the Basemap, and can be modified using the Culture Editor.

ClosedHow do I generate a fault contact?

  1. Select the Fault(s) from the Faults list.

  2. Select the Horizon(s) from the Horizons list. Contacts will be generated where the selected faults cross the horizons.

  3. Select the lines from the Lines list over which to generate contacts.

  4. Set the Horizon Intersection parameters.

  5. In the Parameters Section, select Generate fault-horizon contacts. Optionally select Extend horizon to fault and save picks.

  6. Click to generate contacts. 

The contacts should show up on both the Seismic Viewer and the Basemap.

General Information


Select Faults

Select the faults you want to generate contacts for. Left click to select a fault, or use the Ctrl key on your keyboard to select multiple faults. To help you with your fault selections, you can left click on column headers to sort the column, you can apply a filter (), or you can type a search string into the search bar to limit the information in the list based on Name, or Owner information. 

For additional selection and navigation options right click on the Faults list to access the shortcut menu.

Select Horizons

Left click to select the horizon you wish to generate contacts for from this list. To help you with your horizon selections, you can sort any of the columns by clicking on the column header, you can apply a filter (), or you can type a search string into the search bar to limit the list based on Name, Type, or Owner information.

For additional selection options right click on the Horizonslist to access the shortcut menu.

Select Seismic Lines

Select the seismic lines whose horizons you would like contacts generated for. Left click to select lines, use the Ctrl key on your keyboard to selected multiple lines, or select groups of lines from the Basemap. To help you with your seismic line selections, you can sort any of the columns by clicking on the column header, you can apply a filter (), or you can type a search string into the search bar to limit the list based on Name, or Ownerinformation.

For additional selection and navigation options right click on the Lineslist to access the shortcut menu.

Include SEG-P: Turn this on to include SEG-P lines in the Available list. Horizons can be associated with SEG-P files.

Horizon Intersection Parameters

This item allows the user to specify how to intersect the fault with the horizon to generate the contacts.

Intersect with triangles: Intersect the horizon with the triangulated fault surface.

 Intersect with segments: Intersect the horizon with the raw fault segments.  This item is most useful when working with 2D lines.

  • Determine direction automatically: Lets the software determine whether contacts should be generated in the inline, crossline or diagonal directions.
  • Intersect inlines: Causes the software to generate contacts in the inline direction.
  • Intersect crosslines: Causes the software to generate contacts in the crossline direction.
  • Intersect diagonals down: Causes the software to generate contacts diagonally from lowest trace to highest trace and from lowest line to highest line.  Only meaningful for 3D data and when intersecting with triangles.
  • Intersect diagonals up: Causes the software to generate contacts diagonally from lowest trace to highest trace and from highest line to lowest line.  Only meaningful for 3D data and when intersecting with triangles.

Parameters

These parameters control the generation of contacts and polygons.

Generate polygons: When set causes the application to generate fault polygons.

Generate fault-horizon contacts: When set causes the application to generate fault to horizon contacts.  This can be displayed on the map.

Search Radius: Specify a distance to search.  This is useful when the horizon does not fully contact the fault.  The horizon is artificially extended to attempt to contact the fault.

Extend horizon to fault and save picks: Setting this option will cause horizon picks to be generated to ensure that the horizon physically extends to the fault.  Setting this option will modify the source horizons used in the calculation.

Automatically extend polygons: This option will automatically extend the fault polygon.  Used to extrapolate the fault polygon past the edge of the seismic.  This is very useful when dealing with 2D lines.

Extension Length: Specifies the length to extend the fault polygon past the end of the seismic.  Only used if Automatically Extend Polygons is toggled on.

Generate downthrow symbol: Setting this option will automatically create a downthrow symbol on the fault polygon.

Symbol Height: Specify the height of the downthrow symbol.  Only meaningful if lGenerate Downthrow Symbol is toggled on.

Layer Properties

Specifies the properties of the output fault polygon.

Layer Name: Give an output name for the fault polygon.

Fill Style: Specify the internal fill pattern for the fault polygon on the map.

Line Width: Specify the line thickness for the output polygons.

Generate a closed polygon: Selecting this option will generate a normal closed fault polygon.

Generate a bounding polyline: Selecting this option will generate a fault line rather than a closed polygon. 

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