Petrel地震解释M6_Fault_Interpretation

Selecting a fault patch with Select/pick mode in a 3D window (gray patch) marks it as a red dot in the Stereonet
Interactively hide fault patches
1. Make sure the Automatic fault extraction process is activated 2. A set of tools will be available in the Function bar. Activate the Set select/pick mode icon and select fault patches to edit 1 3. Click on the Hide selected patches patches are hidden icon and the selected fault 2
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Settings for fault patches – Histogram filtering
1. Right click on the fault patches object and open Settings 2. Go to the Histogram tab and filter on the Fault Patch surface area. Click on the histogram representing the small areas and click Apply 1
- Undo [Ctrl+Z] - Redo [Ctrl+Y] - Delete [Del]
Manual fault interpretation
1. Open an Interpretation Window and display a seismic line with a clearly defined fault 2. Insert New Interpretation Folder. Rename and right click in order to Insert New Fault interpretation 3. To activate the Fault Interpretation, click the icon or press the ’F’ key 4. Interpret the discontinuity in the data and break the fault interpretation with a flag [N] 5. Set an increment in the Plane step pull down menu. Interpret the fault in both directions
Automatic fault extraction
1 1. In the Automatic fault extraction process, go to the Extract fault patches tab 2. Left click and drop in the Ant-tracking cube in the dialog box 3. Set Fault extraction parameters and click Extract fault patches 4. Fault patches are put in Input pane
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Icons used for Fault interpretation
Activate the Seismic Interpretation process in the Process pane to update the function toolbar with the interpretation tools.
3. Repeat until fault is fully interpreted
4. Select patches ( and Shift + ) describing the fault icon
5. Click on Merge selected patches
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Smooth fault patches
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Semi-automatic fault patch interpretation
1. Set looser Extract fault patches parameters 2. Activate the Seeded 3D fault autotracking set a seed point on an Ant cube line icon and manually 4 1
- Interpret faults [F]
- Join points in segments [J] - Cut segments [T]
Activate fault
- Selection paintbrush - Bounding box select - Eraser
Start new line (insert flag) [N]
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- Interpret Faults [F] - Join Points In Segments - Cut Segments - Select & Edit/add points In 3D, display (QC) the interpreted fault Note: Fault segments are added to the active fault (bold in input pane) or to a new fault (no bolded faults in input pane).
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3. The small faults will be hidden
Settings for fault patches – Stereonet filtering
1. Go to the Stereonet tab and filter on the fault patch dip and azimuth 1 2 2. Faults with dip and azimuth falling in the grey area in the Stereonet are not displayed
Convert fault patches to interpretation or Modeled faults
1. Activate Select/pick mode to select fault patches for conversion 2. Click on the Convert selected to fault interpretation icon. The fault interpretation is put under an Interpretation folder in the Input pane 3. Click on the Convert selected to fault in fault model icon. The modeled faults are put in Models pane of Petrel Explorer 4. Spacing and height of the modeled faults and fault sticks are controlled from the process Setting tab 1 2 3 4
Quality control the automatic generated faults
1. Quality check the faults against seismic and attributes. 2. Step through the volumes using the player 3. Edit/delete the points that are not correct
4. Set the Control of Fault Patch Smoothing slider to a stronger smoothing. Apply and Smooth again
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Note: Patches cannot be edited, only smoothed and merged. Edit patch after converting to fault interpretation or fault model.
1. Open Settings tab for the Automatic fault extraction process, keep default parameters 2. Select the patch 3. Undo and click on the Smooth icon 1
the latest smooth if not satisfied 4
Fault Interpretation
Objectives
• • • • • • • • Automatic fault extraction Settings for fault patches Stereonet and Histogram filtering Edit extracted faults Convert fault patches to fault sticks and fault model Manual fault interpretation Manipulate faults Finalize fault interpretation
Fault dialog
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Stereonet settings
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Histogram settings Seeded 3D fault Toggle patch Hide patches Show hiden patches Merge patches
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来自百度文库
Smooth patches Convert to fault sticks Convert fault model Undo operation Delete patches
Note: Faults are digitized as segments. Triangulation is used to display surfaces.
Manual fault interpretation – multiple faults
1. Tile a 3D and an Interpretation window vertically, displaying the same Xline 2. Insert a New fault, make it active and toggle it on. 3. Interpret all discontinuities observed, break with a flag [N]. 4. Go stepwise in both directions using the player and interpret the faults. 1
Ant-tracking – Automatic fault extraction process
1. Activate the Automatic fault extraction process under Geophysics in the Processes pane 2. Double click on the process, go to the Info tab to get general information 3. New function bar available for the Automatic fault extraction process