System and method for seismic trace analysis

G - Physics – 01 – V

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G01V 1/34 (2006.01) G01V 1/36 (2006.01)

Patent

CA 2728208

Seismic data are processed to reduce or eliminate aliasing due, for example to sparse or irregular sampling. An iterative method includes an inhibiting function used in conjunction with a function evaluating a mag-nitude of Fourier coefficients that together act to reduce the effects of aliased energies and preferentially select true energies. Computa-tional steps are conducted primarily in k--space, without returning to x-space, thereby reducing computational costs.

Des données sismiques sont traitées pour réduire ou éliminer le repliement dû, par exemple, à un échantillonnage clairsemé ou irrégulier. Une méthode itérative fait appel à une fonction d'inhibition utilisée conjointement à une fonction évaluant une amplitude de coefficients de Fourier qui agissent ensemble pour réduire les effets d'énergies de repliement et sélectionnent de préférence des énergies réelles. Les étapes de calcul sont mises en oeuvre principalement dans un espace k, sans retourner à un espace x, les coûts de calcul étant ainsi réduits.

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