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The Coherence Attribute
Among the different kinds of attributes, the coherence attribute is one that does not require extensive interpretation work. Coherence coefficients for seismic trace similarity are calculated in a grid using a nine-trace operator. The coherence algorithm is used to enhance discontinuities (faults and/or stratigraphic details) in 2D and 3D data.
Figure 1 shows an example of an application of the coherence algorithm, with a nominal seismic time slice (colored image) and a coherency time slice (black and white image). Faults are difficult to interpret in the conventional time slice, but these are clearly shown in the coherency time slice.
