Method for optimal wave field separation
AssigneeWesternGeco L.L.C.
InventorsAhmet Kemal Ozdemir, Ali Ozbek
Life of this patent
Estimating the term…
Abstract
A technique for decomposing a recorded wave field represented in a set of multicomponent, marine seismic data centers around a computer-implemented method including: estimating the statistics of the noise terms in each one of a predetermined group of seismic measurements in a seismic data set acquired in a marine survey; modeling the physical propagation of a recorded wave field represented in the seismic data set from the estimated statistics; and estimating a directional component of the recorded wave field from the physical propagation model that minimizes error relative to the seismic measurements.
Claims40
A computer-implemented method, comprising:
- estimating the statistics of the noise terms in each one of a predetermined group of seismic measurements in a seismic data set acquired in a marine survey;
- modeling the physical propagation of a recorded wave field represented in the seismic data set from the estimated statistics;
- and
- estimating a directional component of the recorded wave field from the physical propagation model that minimizes error relative to the seismic measurements.
A computing apparatus, comprising:
- a processor;
- a bus system;
- a storage communicating with the processor over the bus system;
- and
- an application residing on the storage that, when executed by the processor, performs a method, comprising:
- estimating the statistics of the noise terms in each one of a predetermined group of seismic measurements in a seismic data set acquired in a marine survey;
- modeling the physical propagation of a recorded wave field represented in the seismic data set from the estimated statistics;
- and
- estimating a directional component of the recorded wave field from the physical propagation model that minimizes error relative to the seismic measurements.
A computer-implemented method, comprising:
- modeling the physical propagation of a recorded wave field represented in a seismic data set acquired in a marine survey;
- and
- determining an optimal estimation of a directional component of the recorded wave field from the physical propagation model.
A computer-implemented method, comprising:
- modeling the physical propagation of a recorded wave field represented in a seismic data set acquired in a towed-array marine survey, the model being derived from each one of a predetermined group of seismic measurements in the seismic data set;
- and
- identifying an estimation of a directional component of the recorded wave field from the physical propagation model that minimizes the fit error between the seismic measurements and the estimate derived from the seismic measurements.
A computer-implemented method, comprising:
- identifying a downgoing component of a recorded wavefield represented by a set of seismic data set acquired in a marine survey, including:
- estimating the statistics of the noise terms in each one of a predetermined group of seismic measurements in the seismic data;
- modeling the physical propagation of the recorded wave field from the estimated statistics;
- and
- estimating the downgoing component from the physical propagation model that minimizes error relative to the seismic measurements;
- and
- deghosting the seismic data using the estimated downgoing component.
Dependencies are inferred from the claim text.