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Ryan Williams | October 12, 2017

Geoteric’s Adaptive Fault Interpretation

Ryan Williams

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Blog Adaptive Interpretation

Geoteric’s Adaptive Fault Interpretation provides a fast and accurate interpretation system which improves the efficiency of your fault interpretation.

The Adaptive Faults are data following fault sticks, which snap to discontinuities in reflectivity data, attributes or CMY Blends.  With just 2 clicks of the mouse you can have an accurate fault stick.   The Graph Theory looks at how similar the attribute, or break in the seismic data is from the background and determines the best route from first click to where the cursor is located. 

To start interpreting the faults, click on the Interpret module (figure 1) or right click in the 3D scene and select Adaptive Faults.  Either option will bring up the main Interpretation menu in the 3D scene.

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Figure 1: Interpret Module with the ability to select Adaptive Faults.

Figure 2 shows the main Interpretation toolbar. From left to right the buttons are: Adaptive Horizon Interpretation, Adaptive Fault Interpretation, New Fault Set, Data Following Fault Sticks, Linear/Manual Fault Sticks.  Simply choose the type of fault interpretation and begin interpreting.

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Figure 2: Geoteric's Adaptive Interpretation toolbar.

To begin interpreting, choose either the reflectivity data, an attribute or CMY Blend.  Hold down the shift key and MB1, move the mouse down the slice to see the preview of the fault stick.  Once the fault stick is in the desired location, press MB1 again.  To release the fault stick either double click or use the Esc key.  To undo any clicks, press MB3.  To continue interpreting use either the predefined step intervals above the interpretation menu, or drag the slice or probe. 

Once two fault sticks are interpreted, the surface preview will appear between the fault sticks.  When the slice intersects the fault plane a dashed line will appear.  Figure 3 shows a seismic slice with an Adaptive Fault interpreted on it.  Where the slice intersects the fault plane, a preview of the fault sticks appears as a dashed line.  The interpreter has the option of accepting that fault stick to increase the accuracy of the fault plane or re-interpreting the fault stick.  The button to accept the fault stick preview is Tick button.png , or simply press A on the keyboard.

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Figure 3: Seismic line illustrating the surface preview and potential fault stick along the interpreted fault plane.

There are several ways to view your interpreted Adaptive Faults. You are able to control how to view the fault planes and fault sticks from the properties menu for each Fault Set.  Figure 4 illustrates the various viewing capabilities.

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Figure 4: Various ways in which to view the Adaptive Faults while interpreting.

Once your Adaptive Fault sticks are interpreted, you can create a static surface of the fault, or export the sticks to Petrel or DecisionSpace across the GeoTeric links.  In the coming months the Adaptive Horizons and the Adaptive Faults will recognize each other and a water tight framework can be created within GeoTeric as the next step in the geologic modelling.