US 12,320,937 B2
Full-waveform inversion with elastic mitigation using acoustic anisotropy
Andrew Ratcliffe, Henfield (GB); Cris Henstock, Oslo (NO); Wenlei Gao, Crawley (GB); and Nabil Masmoudi, Crawley (GB)
Assigned to CGG SERVICES SAS, Massy (FR)
Filed by CGG SERVICES SAS, Massy (FR)
Filed on May 2, 2022, as Appl. No. 17/734,322.
Prior Publication US 2023/0350089 A1, Nov. 2, 2023
Int. Cl. G01V 1/30 (2006.01); G01V 1/28 (2006.01)
CPC G01V 1/30 (2013.01) [G01V 1/282 (2013.01); G01V 2210/65 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A seismic exploration method, the method comprising:
obtaining seismic data acquired over an underground formation covered by a water layer;
performing a full-waveform inversion, FWI, of the seismic data using a model with a pseudo-δ layer located directly underneath the water layer to generate synthetic data, the FWI updating the model to minimize differences between the seismic data and the synthetic data; and
locating sought-after natural resources in the underground formation using the model of the underground formation updated by the FWI.