Regrid (Horizon)

Use Regrid to convert a horizon to convert between surveys, or to a different spatial sampling.

Regrid is commonly used to convert:

  • From X/Y horizons to 3D IL/CL horizons
  • From 2D horizons to X/Y
  • From 3D horizons to 2D lines
  • Multi-survey horizons onto a single survey


Note: The Regrid button is disabled if a horizon is selected in the map view that is waiting for another operation (such as propagation). Insight notifies you to complete the previous operation before continuing.

Where is the regrid operation?

Regrid is found in the Map View, under the Operations tab (along with other horizon operations).

  1. Open the Map View.
  2. Expand the left panel and open the Operations tab.
  3. At Operation, select Regrid.

Tip: Click the Help icon to read more information about this operation.

Configuring Regrid

  1. In the navigation bar, select the horizon to regrid.
  2. At Survey, select the output survey:
    • To create X/Y grids, select <<X/Y>>.
    • To create IL/CL grids, select the 3D survey.
    • To create horizons on 2D lines, select the 2D survey.
      • The input horizon must overlap or intersect the 2D survey
    • For gather horizon, enter the gather domain values.
  3. At Area, select a polygon/probe to constrain the operation.
  4. Enable Faults to prevent the regridding calculation from crossing fault planes.
    • Insight honours any enabled faults in the Control Panel. Unassigned fault sticks are not used.
  5. Fault Polygon: Exclude the area inside the selected fault polygon.
  6. Interpolation Settings: (see How Interpolation Settings Work)
    • Interpolate:
      • If disabled: Only output results where input values exist
      • if enabled: Output results near input values (use interpolation)
    • Spreading: natural neighbour weighting
    • Smoothing: inverse-distance weighting
    • Strike/dip: define the weight in the strike direction
    • Direction (degrees): The azimuth of the strike axis, in degrees (clockwise from North).      
  7. Extrapolate: If selected, enable extrapolate to completely fill a specified region according to the settings.
  8. Click Regrid.

Completing the operation

After running the operation:

  • At Class: Choose the Display Class for the results
  • Use min and max from class settings (checked)
    • Use amplitude ranges from the class. Update the range in the display class.
  • Use min and max from class settings (not checked)
    • Set specific a min and max value for this result.
    • Click Adjust to set the Min and Max from the extracted amplitude.
  • Click Discard to cancel this calculation and delete the results.
  • Click Create to create a new horizon containing the extracted values.
  • Click Add property to store the result as a horizon property.

Note: By default, the new horizon will be named: “Well Marker: marker_name (domain survey)”.  For example, the operation above will yield a new horizon called "Well marker: Sand_B5_base (TVDSS (m) IL/CL)". To rename the horizon, see Horizon Details and Configuration.