Seismic data acquisition and processing using non-linear...

Details Seismic data acquisition and processing using non-linear... Seismic data acquisition and processing using non-linear...

G - Physics

01

V

G01V 1/36 (2006.01) G06F 17/10 (2006.01) G06F 19/00 (2006.01)

Patent

CA 2277119

In a seismic data acquisition system that uses a vibratory source an actual groundforce signal is recorded. This groundforce signal includes, in addition to a reference sweep signal, noise including harmonic distortion. This recorded groundforce signal is used to derive a filter that is used for filtering seismic data that has been generated by the source and reflected by subsurface reflectors to suitable detectors at the surface. The filter is derived by dividing, in the frequency domain, a short duration wavelet by the time derivative of the ground force signal.

La présente invention concerne, sous certains aspects, un système et un procédé permettant d'améliorer les données sismiques d'une source vibratoire. Le procédé considéré consiste à produire un filtre (C) qui prend un signal enregistré de force de sol sismique (118), incluant sa distorsion harmonique, et le convertit en une brève ondelette attendue. Cette ondelette sert de base pour la génération d'un filtre (122) à appliquer aux données sismiques (124).

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