G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 1/00 (2006.01)
Patent
CA 2526360
A method for enhancing signal-to-noise (S/N) ratio of seismic data is presented. An ensemble of input traces is decomposed into a plurality of frequency bands of traces. Trace and signal power and then a maximum allowable signal-to-noise ratio are estimated for each frequency band. Weights are calculated which are functions of the inverse noise power or rms. The amplitudes in each of the traces are reformed using a fitting function which utilizes the estimated weights to create true relative amplitude signal enhanced traces. The weighting function has data adaptive parameters which can be changed to accommodate noise characteristics such coherency, incoherency, Gaussian and non-Gaussian distributions, etc. The method may be applied across many different coordinate systems. The method may be applied iteratively to seismic data to shape the noise distribution of the seismic data.
L'invention concerne permettant d'améliorer le rapport signal/bruit (S/N) des données sismiques. Ce procédé consiste à décomposer un ensemble de traces d'entrée en une pluralité de bandes de fréquence de traces, à estimer la puissance des traces et du signal, puis le rapport signal/bruit maximal admissible pour chaque bande de fréquence, à calculer des facteurs de pondération, qui sont des fonctions de la puissance inverse du bruit ou puissance quadratique moyenne (rms). Les amplitudes de chaque trace sont reformées à l'aide d'une fonction d'adaptation qui utilise les facteurs de pondération estimés pour créer des traces présentant une amplit
Bones Dennis G.
Herkenhoff E. Frederic
Louie Kendal Bong Hu
Chevron U.s.a. Inc.
Sim & Mcburney
LandOfFree
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