Interpolation and/or extrapolation of seismic data
AssigneeWesternGeco L.L.C.
InventorPhilip Christie
Life of this patent
Estimating the term…
Abstract
A method of processing seismic data is provided in the seismic data is acquired at a plurality of locations and the method comprises interpolating and/or extrapolating the seismic data, thereby to estimate seismic data at a target location different from the plurality of locations. The interpolating and/or extrapolating the seismic data is performed in a polar co-ordinate system. The method may provide for, among other things, accuracy of estimation; particularly at short offsets from the seismic source. The polar co-ordinate system used may be chosen to approximate the seismic wavefront in an earth model, for example in an earth model in which properties vary only with depth.
Claims18
A method of processing seismic data acquired at a plurality of locations, the method comprising:
- interpolating and/or extrapolating the seismic data-to estimate seismic data at a target location different from the plurality of locations, wherein the interpolating and/or extrapolating of the seismic data is performed in a polar co-ordinate system, and wherein a coordinate origin of the polar co-ordinate system is configured to be substantially coincident with a location of a seismic source used in the acquisition of the seismic data;
- and
- processing the estimated seismic data for the target location to obtain information about one or more parameters of the earth's interior.
A computer-readable medium containing instructions that, when executed by a processor, perform a method of processing seismic data acquired at a plurality of locations, the method comprising interpolating and/or extrapolating the seismic data-in a polar co-ordinate system to estimate seismic data at a target location, wherein the target location is different from the plurality of locations and a coordinate origin of the polar co-ordinate system is configured to be consistent with an epicenter of a seismic source used to acquire the seismic data.
Dependencies are inferred from the claim text.