OpendTect Pro supports many attributes, filters and utilities for imaging faults and fractures. We have now combined all these tools in a new commercial plugin called the Faults & Fractures plugin.
The Thinned fault likelihood attribute provides razor-sharp fault images on horizontal slices as well as on vertical sections (Figure 1).
Figure 1 Smoothed seismic with Thinned Fault Likelihood attribute overlay.
This attribute (and/or volume curvature-type of attributes) can be used as input attributes for fracture density and fracture proximity attributes (Figure 2).
Figure 2 Fracture Density (right) and Fracture Proximity (left) attributes computed from Thinned Fault Likelihood attribute.
This new plugin also comes with a new, edge-preserving smoothing filter. This smoothing algorithm uses Thinned Fault Likelihood attribute as input. It generates seismic volumes with razor-sharp edges that are very well suited for structural interpretation (Figure 3). For further quantitative work milder filters such as the dip-steered median filter are needed.
Figure 3 Result of the new smoothing filter (bottom) on seismic data (top). North Sea example.
Figure 4 Faults planes extracted from the Thinned Fault Likelihood attribute