Spectral analysis and processing of seismic data using orthogonal image gathers
AssigneeCgg Services SAS
InventorsAdel Khalil, Henning Hoeber, Bernard Deschizeaux
Life of this patent
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Abstract
A method for spectral analysis of seismic data obtains imaged seismic data and generates orthogonally shifted imaged seismic data gathers. The orthogonally shifted imaged seismic data gathers are processed to generate a spectrally processed imaged seismic data. Alternatively, the imaged seismic data are obtained using a spectral processing filter that is a function of a magnitude of a total wavenumber of the imaged seismic data in three dimensions and a spatially variable velocity function.
Claims11
A method for spectral analysis of seismic data, the method comprising:
- obtaining temporally shifted imaged seismic data from migrating recorded seismic data that has been temporally shifted;
- generating orthogonally shifted imaged seismic data gathers by gathering the temporally shifted imaged seismic data;
- and
- processing the orthogonally shifted imaged seismic data gathers in a spectral processing domain using a spectral processing function to generate spectrally processed imaged seismic data.
A method for spectral analysis of seismic data, the method comprising:
- obtaining imaged seismic data;
- generating orthogonally shifted imaged seismic data gathers by gathering the imaged seismic data transformed to a spectral transform domain and then altered to introduce orthogonal shifts in a non-transform domain;
- and
- processing the orthogonally shifted imaged seismic data using a spectral processing function to generate spectrally processed imaged seismic data.
Dependencies are inferred from the claim text.