Changes

Seismic data processing for AVO requires that certain steps be applied to common depth point (CDP) gathers (the individual traces prior to stacking). Areas of importance include (1) generalized [[amplitude correction]]s, (2) [[signal to noise ratio]] improvement, (3) robust [[Basic seismic processing#Deconvolution|deconvolution]], and (4) [[prestack migration]] prior to AVO analysis in structurally complex areas.

Seismic data processing for AVO requires that certain steps be applied to common depth point (CDP) gathers (the individual traces prior to stacking). Areas of importance include (1) generalized [[amplitude correction]]s, (2) [[signal to noise ratio]] improvement, (3) robust [[Basic seismic processing#Deconvolution|deconvolution]], and (4) [[prestack migration]] prior to AVO analysis in structurally complex areas.

Generalized amplitude corrections are probably the most important aspect in extracting and restoring proper amplitude relationships in the data. Amplitude corrections must compensate for (1) irregular source strength, (2) source array effects, (3) inelastic attenuation, (4) transmission loss effects, (5) spherical divergence, (6) receiver array effects, (7) receiver sensitivity, and (8) receiver vertical directivity.

Generalized amplitude corrections are probably the most important aspect in extracting and restoring proper amplitude relationships in the data. Amplitude corrections must compensate for (1) irregular [[source strength]], (2) [[source array]] effects, (3) [[inelastic attenuation]], (4) [[transmission loss]] effects, (5) [[spherical divergence]], (6) [[receiver array]] effects, (7) [[receiver sensitivity]], and (8) [[receiver vertical directivity]].

Surface-consistent amplitude corrections are also necessary when amplitude variations in the data may relate to source and receiver environment and not to the geology. These corrections are distributed among the surface terms of source, receiver, and offset, plus a single subsurface (CDP or geological) term.

Surface-consistent amplitude corrections are also necessary when amplitude variations in the data may relate to source and receiver environment and not to the geology. These corrections are distributed among the surface terms of source, receiver, and offset, plus a single subsurface (CDP or geological) term.