Separation of blended seismic survey data
AssigneePGS Geophysical AS
InventorsMaiza Bekara, Lian Duan
Life of this patent
Estimating the term…
Abstract
Techniques are disclosed relating to deblending of sources in multi-source geophysical survey data, including marine or land-based data. Multiple sets of deblended receiver traces are generated by iteratively applying a coherency filter to estimated sets of deblended receiver traces and updating a residual until a termination condition is reached. In some embodiments, applying the coherency filter during a current iteration may include determining coefficients of the coherency filter based on estimated sets of deblended receiver traces from an immediately prior iteration. In further embodiments, applying the coherency filter may include applying a 3D projection filter, such as an fxy projection filter.
Claims23
A method, comprising:
- accessing seismic recordings comprising blended receiver traces, wherein each of the blended receiver traces contains energy from multiple seismic sources;
- and
- generating multiple sets of deblended receiver traces, wherein each of the multiple sets of deblended receiver traces corresponds to a different one of the multiple seismic sources;
- and
- recording the multiple sets of deblended receiver traces in at least one non-transitory computer readable medium;
- wherein generating the multiple sets of deblended receiver traces comprises iteratively applying a coherency filter to estimated sets of deblended receiver traces and updating a residual until a termination condition is reached;
- and
- wherein applying the coherency filter to the estimated sets of deblended receiver traces during a current iteration comprises determining coefficients of the coherency filter based on estimated sets of deblended receiver traces from an immediately prior iteration.
A non-transitory computer-readable medium having program instructions stored therein that, when executed by one or more processors, cause the one or more processor to perform steps comprising:
- accessing seismic recordings comprising blended receiver traces, wherein each of the blended receiver traces contains energy from multiple seismic sources;
- and
- generating multiple sets of deblended receiver traces, wherein each of the multiple sets of deblended receiver traces corresponds to a different one of the multiple seismic sources;
- and
- wherein generating the multiple sets of deblended receiver traces comprises iteratively applying a coherency filter to estimated sets of deblended receiver traces and updating a residual until a termination condition is reached;
- and
- wherein applying the coherency filter to the estimated sets of deblended receiver traces during a current iteration comprises determining coefficients of the coherency filter based on estimated sets of deblended receiver traces from an immediately prior iteration.
A non-transitory computer-readable medium having program instructions stored therein that, when executed by one or more processors, cause the one or more processor to perform steps comprising:
- accessing seismic recordings comprising blended receiver traces, wherein each of the blended receiver traces contains energy from multiple seismic sources;
- and
- generating multiple sets of deblended receiver traces, wherein each of the multiple sets of deblended receiver traces corresponds to a different one of the multiple seismic sources;
- and
- wherein generating the multiple sets of deblended receiver traces comprises iteratively applying a coherency filter to estimated sets of deblended receiver traces and updating a residual until a termination condition is reached;
- and
- wherein applying the coherency filter to the estimated sets of deblended receiver traces during a current iteration comprises applying a 3D projection filter.
Dependencies are inferred from the claim text.