Background Learning Topic Summary       Close
Multiple Attenuation

Estimated Time to Complete:

40 minutes

(average of 20 minutes per Subtopic)

Conventional seismic processing assumes that primaries are our wanted signal and that multiples are noise. This present topic discusses the characteristics of these multiples and how they lead to the selection of the most appropriate attenuation method. We define primaries as signals that have only one downward path, one reflection and one upward path. However, in practice, we frequently use sources and receivers below the surface and this leads to ghost reflections. When these ghost reflections follow the primary closely, within perhaps 20 ms, these are treated as being part of the source pulse or the receiver response and not considered as multiples though technically they are multiples.

Expand All
Total Number of Subtopics: 2
  • expand/collapse Multiples and their Characteristics
    • Introduction
    • Peg-Leg Multiples
    • Interbed Multiples
    • Long and Short Period Reverberations
    • Dip
  • expand/collapse Multiple Attenuation Method
    • Attenuation Techniques
    • Multiple Attenuation by Stacking
    • Multiple Attenuation using F- K and Radon Transforms
    • Multiple Attenuation by Prediction
    • Multiple Attenuation by Wave Field Extrapolation
    • Surface Related Multiple Elimination
    • Pressure and Velocity Summation
    • References
(Use the '+' and '-' buttons to expand or collapse each Subtopic Title individually for details.)