Method for attenuating coherent noise in marine seismic data

Details Method for attenuating coherent noise in marine seismic data Method for attenuating coherent noise in marine seismic data

G - Physics

01

V

G01V 1/36 (2006.01)

Patent

CA 2148150

A method for adaptively creating a filter for removing coherent environmental noise from a multitrace digitized seismic recording requires the presence, on the recording, of a limited sample of pure noise that is uncontaminated by desired signal. The pure noise sample is used to discover the location of the noise source and from that discovery, to extrapolate and reconstruct the characteristics of the noise envelope as it would appear on the seismic recording. The reconstructed noise envelope is used as a noise reference for input to a conventional iterative adaptive noise cancellation filter loop. For stability, the loop gain is minimized by temporally and spatially averaging the filter coefficients for each sample interval.

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