Iterative least-square inversion for amplitude balancing
Arnaud Berlioux and William S. Harlan
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Variations in source strength and receiver amplitude can introduce
a bias in the final AVO analysis of prestack seismic reflection data.
In this paper we tackle the problem of the amplitude balancing of
the seismic traces from a marine survey. We start with a 2-D energy
map from which the global trend has been removed. In order to balance
this amplitude map, we first invert for the correction coefficients
using an iterative least-square algorithm. The coefficients are
calculated for each shot position along the survey line, each receiver
position in the recording cable, and each offset. Using these
coefficients, we then correct the original amplitude map for amplitude
variations in the shot, receiver, and offset directions.
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