Seismic data processing using a down-going annihilation operator
AssigneeCgg Services SAS
InventorsGordon Poole, Ross Haacke
Life of this patent
Estimating the term…
Abstract
A method for processing seismic data, the method including receiving seismic data acquired by at least one receiver over a water-covered subsurface formation; generating, based on the seismic data, a down-going wavefield; generating, based on the seismic data, a partial down-going wavefield with attenuated water-wave; estimating a subsurface reflectivity R using multi-dimensional deconvolution, which equates (1) a convolution of the down-going wavefield with the subsurface reflectivity R to (2) the partial down-going wavefield; and generating an image of the water-covered subsurface formation based on the subsurface reflectivity R.
Claims20
A method for processing seismic data to improve subsurface imaging, the method comprising:
- receiving seismic data acquired by at least one receiver over a water-covered subsurface formation;
- generating, based on the seismic data, a down-going wavefield;
- transforming the down-going wavefield into a partial down-going wavefield by attenuating a water-wave component;
- estimating a subsurface reflectivity R by performing multi-dimensional deconvolution that maps the down-going wavefield to the partial down-going wavefield over an aperture of source locations, wherein the subsurface reflectivity R represents a set of source-side peg-leg multiples;
- attenuating multiple reflections in the seismic data using a multiple model derived from the subsurface reflectivity R;
- and
- generating an image of the water-covered subsurface formation using the seismic data with the attenuated multiple reflections.
A computing device for processing seismic data to improve subsurface imaging, the computing device comprising:
- an interface for receiving seismic data acquired by at least one receiver over a water-covered subsurface formation;
- and
- a processor connected to the interface and configured to,
- generate, based on the seismic data, a down-going wavefield;
- transform the down-going wavefield into a partial down-going wavefield by attenuating a water-wave component;
- estimate a subsurface reflectivity R by performing a multi-dimensional deconvolution that maps the down-going wavefield to the partial down-going wavefield Du over an aperture of source locations, wherein the subsurface reflectivity R represents a set of source-side peg-leg multiples;
- attenuate multiple reflections in the seismic data using a multiple model derived from the subsurface reflectivity R;
- and
- generate an image of the water-covered subsurface formation using the seismic data with the attenuated multiple reflections.
Dependencies are inferred from the claim text.