Volume blending is a powerful tool for multi-attribute analysis, but its use is limited largely to coherence, reflection strength, and the original seismic data. The success of discontinuity in blending has overshadowed the potential of complementary attributes, especially directional attributes such as amplitude gradients, azimuth, directional dip, and seismic shaded relief. Directional attributes make seismic data appear like illuminated apparent topography, which aids intuition. Amplitude gradients have seen little use but should be explored as they can reveal details not seen in other attributes. Shaded relief is the most powerful directional attribute, but azimuth and directional dip are useful substitutes. Smoothing directional attributes improves them for blending.


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