Method for swell noise detection and attenuation in marine seismic surveys

摘要

Spatial data sequences are extracted in a frequency-space domain at selected frequencies in selected data windows in seismic data. A signal model and residuals are iteratively constructed for each extracted spatial data sequence. Each data sample in each extracted spatial data sequence is assessed to determine if the data sample is noisy. Each noisy data sample in each data sequence is replaced by a corresponding signal model value. The earth's subsurface is imaged using the noise-attenuated seismic data.

主权项

1. A method for imaging the earth's subsurface, comprising using one or more programmable computers programmed to perform at least the following:
extracting spatial data sequences in a frequency-space domain at selected frequencies in selected data windows in seismic data; constructing iteratively a signal model and residuals for each extracted spatial data sequence; assessing each data sample in each extracted spatial data sequence to determine if the data sample is noisy; replacing each noisy data sample in each extracted spatial data sequence by a corresponding signal model value to generate noise attenuated seismic data; and imaging the earth's subsurface using the noise-attenuated seismic data.