US 11,709,288 B2
Seismic imaging with source deconvolution for marine vibrators with random source signatures
Endrias G. Asgedom, Oslo (NO); Okwudili Orji, Drammen (NO); and Walter Söllner, Oslo (NO)
Assigned to PGS Geophysical AS, Oslo (NO)
Filed by PGS GEOPHYSICAL AS, Oslo (NO)
Filed on Aug. 18, 2020, as Appl. No. 16/996,050.
Claims priority of provisional application 62/892,984, filed on Aug. 28, 2019.
Prior Publication US 2021/0063593 A1, Mar. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01V 1/32 (2006.01); G01V 1/30 (2006.01); G01V 1/38 (2006.01); G01V 1/34 (2006.01)
CPC G01V 1/306 (2013.01) [G01V 1/325 (2013.01); G01V 1/345 (2013.01); G01V 1/3808 (2013.01); G01V 2210/3246 (2013.01); G01V 2210/44 (2013.01); G01V 2210/45 (2013.01)] 17 Claims
OG exemplary drawing
 
1. In a process for generating an image of a subterranean formation from seismic data recorded in a marine survey of a subterranean formation, the improvement comprising:
generating an up-going pressure wavefield from a pressure wavefield and a vertical velocity wavefield recorded in the marine survey;
generating a downgoing vertical acceleration wavefield of random sweeps with orthogonal signatures created by contemporaneously activated marine vibrator passing over the subterranean formation;
deconvolving the downgoing vertical acceleration wavefield from the up-going pressure wavefield to generate a subsurface reflectivity wavefield; and
generating an image of the subterranean formation on a display based on the subsurface reflectivity wavefield, thereby increasing resolution of the image with reduced contamination from source wavefield effects.