f Preserved Amplitude Processing with Variable Source of Streamer Depth

The spectral shaping imposed by source and receiver ghosts is well understood. As guns and cables move to shallower depths, the low-frequency content of seismic data is increasingly attenuated and consequently, the average amplitude of the band-limited signal decreases. This phenomenon has become more apparent with the current trend of preserved amplitude processing which tends to exclude automated scaling and short-gap predictive deconvolution. True amplitude survey merging or reservoir monitoring will therefore be in jeopardy if the different vintage data do not have the same source or streamer depth.