Versions Compared

Old Version 16

changes.mady.by.user Former user

Saved on

compared with

New Version Current

changes.mady.by.user Former user

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
Comment: Migrated to Confluence 5.3

...

Panel
borderStyle
borderColor#404040
bgColor#F0F0F0
borderWidth1
borderStyledashed
titleExercisedashed

Grid a time surface from seismic interpretation and no faults.

  1. Display interpretation lines from 02_Time data > Interpretation lines > 02BasePliocene.
  2. Apply the command Simple points and lines gridding
  3. Click Update window to get the project window as the grid window.
  4. Set x and y increment to 500.
    Info
    titleGrid window for Course B1
    • xmin = -188000, xmax = -47500; ymin = 7864500, ymax = 7959000
    • Using grid increment 500 gives as size of grid: number in rows: 282 , number in columns: 190
    • It is a relatively small grid, but useful in a course and the size of the project is kept reasonable low.
  5. Check in Apply reference grid or outline and browse in: 01_Cultural > Boundary border_line
  6. Use gridding algorithm Parabolic (default).
  7. Check in for *Use two steps gridding". Grid increment will be automatic calculated if blank.
  8. Set moving average as gridding algorithm for 1. step.
  9. Click Execute. The result will be written to the same folder.
  10. Click OK and save the panel with all parameters.
  11. Create a new folder for interpretation grids and cut/paste the result grid into this folder.
  12. Display the result as shown below.
    Info
    titleDisplaying color legend
    • The color legend is often displayed with the shell command cco. In the example below the following procedure was used:
    • Screen in 2D mode. Click a cursor point at lower right.
    • Use the shell command: cco rev cur col bla tit Time. The cur argument refers to the cursor position. Look at the reference manual if necessary.

...

h4. Grid a time surface from seismic interpretation and closed stick faults. # Display *02_Time data > Faults > 07SilurianFaultInt_Polygons*. This is how the fault polygons comes from *Kingdom*. They must be edited. # Use *Edit points and lines* to remove the _blobs_. See [art:Case study - Gridding of seismic interpretation data with faults]. # The correct edited fault lines are in *02_Time data > Faults > CorrectedClosedFaults*. Use this if you don't have time to complete the editing. {tip:title=Tips when editing fault lines with _blobs_} * To remove the _blobs_ just delete the two extra points in the _blobs_. {tip} # Apply the command *Gridding > Gridding points, lines and faults* and activate it on the proper interpretation lines. * Don't alter type of input data (under development). Use default: *Single points*. * Click *Use active window* to get the _project window_ into the _grid window_. * Set the x and y _increment_ to 500. Click *Adjust to Increment* to secure that the grid window is adjusted to the increments. If the grid window changes update the _project window_ in *Project Settings*. It is an recommended that the _project window_ and _grid window_ are equal and adjusted to the grid incrments. * Click *Calculate* to get number of elements in rows and columns: *282 x 190* * * Go to the *Fault Input* tab. * Check in *Closed stick faults* and browse in: *{Course B1} / {02_Time data} Faults CorrectedClosedFaults* * Clik *Test* at bottom to do the blanking test. The fault polygon should be filled inside. No lines outside. * * Go to the *Grid options* tab. * Check in *Use reference grid or outline* and browse in: *{Course B1} / 01_Cultural Boundary border_line*
Panel
borderColor#404040
bgColor#F0F0F0
borderWidth1
titleExercise
borderStyledashed
Wiki Markup
titleExercise

Grid a time surface from seismic interpretation and closed stick faults.

  1. Display 02_Time data > Faults > 07SilurianFaultInt_Polygons. This is how the fault polygons comes from Kingdom. They must be edited.
  2. Use Edit points and lines to remove the blobs. See Gridding seismic interpretation with faults.
  3. The correct edited fault lines are in 02_Time data > Faults > CorrectedClosedFaults. Use this if you don't have time to complete the editing.
    Tip
    titleTips when editing fault lines with _blobs_
    • To remove the blobs just delete the two extra points in the blobs.
  4. Apply the command Gridding > Gridding points, lines and faults and activate it on the proper interpretation lines.
  5. Don't alter type of input data (under development). Use default: Single points.
  6. Click Use active window to get the project window into the grid window.
  7. Set the x and y increment to 500. Click Adjust to Increment to secure that the grid window is adjusted to the increments. If the grid window changes update the project window in Project Settings. It is an recommended that the project window and grid window are equal and adjusted to the grid increments.
  8. Click Calculate to get number of elements in rows and columns: 282 x 190.
  9. Go to the Fault Input tab.
  10. Check in Closed stick faults and browse in: 02_Time data > Faults > CorrectedClosedFaults
  11. Clik Test at bottom to do the blanking test. The fault polygon should be filled inside. No lines outside.
  12. Go to the Grid options tab.
  13. Check in Use reference grid or outline and browse in: 01_Cultural > Boundary border_line.
  14. Check in Use two gridding steps.
  15. Go to to Result Grid tab.
  16. Set the saving option to Save in project. The result grid will be saved in the same folder as input unless another folder is browsed in.
  17. Click Execute
  18. A default display of the result grid appears. Delete this and display using Display Contours.
  19. The faults lines have been assigned z values and are located in workspace as closedGenFaults. Transfer them to the project using: folder > New > Workspace Data > closeGenFaults.
  20. Click OK to save the grid panel.
  21. If time, repeat the procedure for all faulted horizons. If not use the data in the course project.
Section
Column
width50%

Image Modified
Seismic 2D sections and navigation lines Silurian interpretation lines and faults

Column
width50%

Image Modified
Detail of seismic and interpretatin Silurian grid with faults and input lines