Amplitude balancing for AVO analysis

Arnaud Berlioux and David Lumley

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Source and receiver amplitude variations can distort AVO analysis of prestack seismic reflection data. We therefore perform an amplitude balancing of seismic traces from a marine data set. We address this problem by computing the total energy of each trace in the seismic survey, and remove the global low-wavenumber amplitude trend from the resulting 2-D trace energy map. We then estimate an amplitude coefficient for each physical hydrophone position in the recording cable, and each shot position along the survey line. We apply these coefficients to the original seismic traces and successfully remove most of the source and receiver amplitude variation.

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