Processing seismic data acquired using moving non-impulsive sources
AssigneeCgg Services SAS
InventorsGordon Poole, Can Peng
Life of this patent
Estimating the term…
Abstract
Methods for processing seismic data acquired with non-impulsive moving sources are provided. Some methods remove cross-talk noise from the seismic data using emitted signal data and an underground formation's response estimate, which may be iteratively enhanced. Some methods perform resampling before a spatial or a spatio-temporal inversion. Some methods compensate for source's motion during the inversion, and/or are usable for multiple independently moving sources.
Claims16
A method for processing seismic data related to a moving non-impulsive source, the method comprising:
- obtaining seismic data, emitted signal data and an underground formation's response, UFR, estimate;
- calculating a noisy UFR estimate using the seismic data and the emitted signal data, and a cross-talk estimate using the emitted signal data and the UFR estimate;
- subtracting the cross-talk estimate from the noisy UFR estimate to obtain an updated UFR estimate;
- and
- generating an image of underground formation's structure based on the updated UFR estimate.
A seismic data processing apparatus for processing seismic data related to a moving non-impulsive source to obtain an image of an explored underground formation, comprising:
- an interface configured to obtain the seismic data, emitted signal data and an underground formation's response, UFR, estimate;
- and
- a data processing unit configured to calculate a cross-talk estimate using the emitted signal data and the UFR estimate, to obtain a noisy UFR estimate using the seismic data and the emitted signal data, to subtract the cross-talk estimate from the noisy UFR estimate to obtain an updated UFR estimate, and to generate an image of underground formation's structure based on the updated UFR estimate.
Dependencies are inferred from the claim text.