Classes of seismic attributes? Multi-Trace Types Classes of seismic attributes? Trace A Trace B Multi-Trace Dip / azimuth Coherency Slide 13 Another class of seismic attribute involves the simultaneous analysis more than one trace For example, an interpreter will map (correlate) a peak or trough through an area Software can then calculate two attributes the dip of the interpreted horizon (in msec/trace) the azimuth – the compass direction of the maximum dip direction (e.g., 15° East of North) Coherency is a popular multi-trace attribute in industry it is a measure of similarity between a window of one trace relative to its neighboring trace or traces we discussed coherency in the structural lecture (Unit 10) it is a volume-based attribute – not needing an interpreted horizon Correlation Window R2 = 0.92 Amplitude A Amplitude B Courtesy of ExxonMobil L 13 - Seismic Attributes