Dynamic resolution full-waveform inversion method and system
AssigneeCgg Services SAS
InventorsMin Wang, Yi Xie
Life of this patent
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Abstract
A method for raw seismic data inversion includes receiving raw seismic data acquired over an underground formation, receiving an initial velocity model of the underground formation, performing a dynamic resolution full waveform inversion, DR-FWI, on the raw seismic data so that a tomography component of a velocity gradient G is compensated to generate a compensated tomographic component while a diving wave component and a migration component are preserved, outputting an updated velocity model based on an illumination compensated velocity gradient G′, which is calculated based on the compensated tomographic component), and locating natural resources in the underground formation using the updated velocity model updated by the DR-FWI.
Claims20
A method for raw seismic data inversion, the method comprising:
- receiving raw seismic data acquired over an underground formation;
- receiving an initial velocity model of the underground formation;
- performing a dynamic resolution full waveform inversion, DR-FWI, on the raw seismic data so that a tomography component of a velocity gradient G is compensated to generate a compensated tomographic component while a diving wave component and a migration component are preserved;
- outputting an updated velocity model based on an illumination compensated velocity gradient G′, which is calculated based on the compensated tomographic component;
- and
- locating natural resources in the underground formation using the updated velocity model updated by the DR-FWI.
A computing device for raw seismic data inversion, the device comprising:
- an interface for receiving raw seismic data acquired over an underground formation, and for receiving an initial velocity model of the underground formation;
- and
- a processor connected to the interface and configured to:
- perform a dynamic resolution full waveform inversion, DR-FWI, on the raw seismic data so that a tomography component of a velocity gradient G is compensated to generate a compensated tomographic component while a diving wave component and a migration component are preserved;
- output an updated velocity model based on an illumination compensated velocity gradient G′, which is calculated based on the compensated tomographic component;
- and
- locate natural resources in the underground formation using the updated velocity model updated by the DR-FWI.
A non-transitory computer readable recording medium storing executable codes that when executed by a computer make the computer perform a method for raw seismic data inversion, the method comprising:
- receiving raw seismic data acquired over an underground formation;
- receiving an initial velocity model of the underground formation;
- performing a dynamic resolution full waveform inversion, DR-FWI, on the raw seismic data so that a tomography component of a velocity gradient G is compensated to generate a compensated tomographic component while a diving wave component and a migration component are preserved;
- outputting an updated velocity model based on an illumination compensated velocity gradient G′, which is calculated based on the compensated tomographic component;
- and
- locating natural resources in the underground formation using the updated velocity model updated by the DR-FWI.
Dependencies are inferred from the claim text.