US 12,313,802 B2
Separation of blended seismic survey data
Maiza Bekara, Weybridge (GB); and Lian Duan, Weybridge (GB)
Assigned to PGS Geophysical AS, Oslo (NO)
Filed by PGS Geophysical AS, Oslo (NO)
Filed on Dec. 14, 2022, as Appl. No. 18/081,502.
Application 18/081,502 is a continuation of application No. 16/533,173, filed on Aug. 6, 2019, granted, now 11,567,226.
Claims priority of provisional application 62/789,816, filed on Jan. 8, 2019.
Claims priority of provisional application 62/724,101, filed on Aug. 29, 2018.
Prior Publication US 2023/0117321 A1, Apr. 20, 2023
Int. Cl. G01V 1/36 (2006.01); G01V 1/24 (2006.01); G01V 1/38 (2006.01)
CPC G01V 1/3808 (2013.01) [G01V 1/247 (2013.01); G01V 1/36 (2013.01); G01V 2210/3246 (2013.01)] 23 Claims
OG exemplary drawing
 
1. 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.