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Well Correlation
Petrel Workflow Tools5 Day Introduction Course
FaultModeling
PillarGridding
Zonation and Layering
FaciesModeling
PetrophysicalModeling
Well DesignVolume Calculation
Plotting
Data Import
Intr
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Pet
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Edit
Inpu
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Impo
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Proc
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Man
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Seismic
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Seismic – Data VisualizationObjectives
Visualize data in 3D, 2D (Base Map) and Interpretation windows
Digitize a random line
Create arbitrary and aligned seismic random lines
Create well intersection fence
Tile windows
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3D Window
2. To display a seismic line in the active display window click on the check box in front of a seismic line.
1. Display seismic: Open the seismic cube folder. In-line and Cross-line are available. Add other seismic line types by right-clicking on the seismic cube folder and select the seismic intersection(s).
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‘Base Map’ (2D) WindowA Petrel 2D window is used as a seismic base map, allowing you to display and manipulate seismic lines as well as displaying other data (such as wells or interpretations). To create a seismic base map:
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3. Under the Style tab specify the Base Map annotation.
1. Open a 2D window. Rename to Seismic Base map
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2. Double-click on the Survey folder to open the Settings dialog.
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4. Select the check boxes in the Input pane to display seismic lines.
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Selecting Seismic Lines
Method 1A. Activate the Seismic Interpretation
process and activate the proper cube (bold).
B. Use the icons in the Function bar. Select line (in-line, cross-line, random line) using the left mouse button.
Select in-line. Scroll with the mouse, click with left mouse button to select.
Select cross-line. Scroll with mouse, click with left mouse button to select.
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Step through volume
Play through volume
Go to end
Set step/play incrementStop
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Method 2C. Activate line (in-line, cross-line,
random line etc.) in Input pane.D. Use the player at the bottom of the
window.
Method 3E. Click Manipulate Plane icon.F. Drag in window using Left mouse
button.
Note: these methods work for both 2D and 3D windows.
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Create an Interpretation Window
You can interpret in a 3D window or an Interpretation window. There are 2 ways to create an Interpretation window: B
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Method 1A. Right-click on a seismic line and
choose Create Interpretation window.
B. The line will automatically be displayed in the window.
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Method 2C. Go to the Window menu on the
top toolbar and select New Interpretation Window. An empty Interpretation window will appear.
D. To display a seismic line in the Interpretation window toggle on the check box in front of a seismic line
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Interpretation Window
1. To Pan, position cursor on the lower, right white bar (horizontal/vertical movement) or anywhere else in window (free movement) - move using the left mouse button.
2. To Zoom, position cursor between the white and the grey lower/right area in the bars and move using left mouse button (or use Left mouse+Ctrl+Shift)
3. To Squeeze, hit the line between the grey/white area. Use Shift key + left mouse button to stretch/squeeze
Note: It is also possible to zoom using the Magnifying glass in Function bar
Drag a square using the left mouse button.
To un-zoom use Shift+Z.
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Tile Windows Tile the 3D, Interpretation and 2D windows for better overview. Interpretation is updated dynamically between windows.
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1. Automatically. Similar to an in-line or cross-line in that it is a vertical intersection extending through the seismic volume without any bends or turns.
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Random/Arbitrary Seismic LinesIn addition to displaying In-lines, Cross-lines and Time slices, you can create random or arbitrary lines through a seismic volume. There are five methods:
22. Using an arbitrary polyline
intersection. In a 3D or 2D window, you define the desired path of the line.
33. Using a seismic aligned polyline
intersection. Similar to an arbitrary polyline intersection, you define the desired turning points but the path between points is snapped to either the in-line or cross-line direction.
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Random/Arbitrary Seismic Lines
5. Between selected wells. This is called a Well Intersection Fence.
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4. Using a combination of arbitrary and aligned polylines. Same process as for 2, use the Ctrl key to snap to either the in-line or cross-line direction.
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Wells – Displaying Data in Time
1. Load velocity data for wells (e.g. check shots, sonic logs, etc).
In order to display well data in time, a time-depth relationship for each well is required. The general procedure is:
2. Create time log for each well. This will determine the time-depth relationship to use for displaying well data in time.
3. Display well bores.
4. Set domain and display picks and fault cuts.
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Wells – Import Check Shots
4. Adjust parameters if necessary and click OK.
1. Create check shot folder by going to Insert >New Check Shots.
2. Right-click on the Check Shot folder under Wells and select Import (on Selection).
3. Select file(s) and format and click Open.
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Wells – Create time logs
3. A time log will be created for each well.
1. Double-click on Wells folder to open Settings dialog.
2. Go to Time tab. If there are multiple entries, make sure the preferred time-depth relation is first on the list, toggle on and Execute, click OK.
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Wells – Display Well Tops in Time
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1. In the top toolbar, change the domain to TWT.
2. Toggle on the check box next to the Well Tops folder.Expand the Attributes folder under the Well Tops folder.
3. Toggle on TWT Auto attribute.
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Random Lines – Well Section Fence
How to create a Well Section Fence
1. Open a new Well Section Window from the windows menu. Go to the Wells folder and toggle the wells you want to include.
2. The Well Section Fence is placed in the Well Section folder in the windows tab, only active when 3D window is open.
3. Click on the blue button: Toggle visualization on plane.
4. Click on the blue check box in front of the Seismic 3D cube.
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EXERCISE Seismic Visualization