Reconstructing seismic wavefields
AssigneeWesternGeco L.L.C.
InventorsDirk-Jan Van Manen, Massimiliano Vassallo, Ali Ozbek
Life of this patent
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Abstract
A technique includes receiving seismic data acquired in a seismic survey in the vicinity of a reflecting interface. The survey has an associated undersampled direction. The technique includes providing second data indicative of discrete samples of incident and reflected components of a continuous seismic wavefield along the undersampled direction and relating the discrete samples to a linear combination of the continuous incident and reflected seismic wavefields using at least one linear filter. Based on the relationship, an unaliased representation of the linear combination of the continuous incident and reflected seismic wavefields is constructed.
Claims22
A method, comprising:
- receiving seismic data acquired in a seismic survey in the vicinity of a reflecting interface, the survey having an associated undersampled direction;
- providing first discrete samples representing an incident component of a continuous seismic wavefield along the undersampled direction and second discrete samples representing a reflected component of the continuous seismic wavefield along the undersampled direction;
- relating the first and second discrete samples to a linear combination of the continuous incident and reflected seismic wavefield components using at least one linear filter;
- and
- based on the relationship, constructing an unaliased representation of the linear combination of the continuous incident and reflected seismic wavefield components,
- wherein at least one of the acts of receiving, providing, relating and constructing is performed on a processor-based machine.
A system comprising:
- an interface to receive seismic data acquired in a seismic survey in the vicinity of a reflected interface, the survey having an associated undersampled direction;
- and
- a processor to:
- process first discrete samples representing an incident component of a continuous seismic wavefield along the undersampled direction and second discrete samples representing a reflected component of the continuous seismic wavefield along the undersampled direction;
- model the first and second discrete samples as being a linear combination of the continuous incident and reflected seismic wavefield components using at least one linear filter;
- and
- based on the modeling, construct an unaliased representation of the linear combination of the continuous incident and reflected seismic wavefield components.
Dependencies are inferred from the claim text.