Patent ID: 11940579
Assignee: CGG SERVICES SAS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A seismic exploration method comprising:
obtaining seismic data acquired in an area over a subsurface formation;
migrating the seismic data based on a model of the subsurface formation and using a wave-equation Kirchhoff, WEK, technique, for pre-defined surface locations, the WEK technique including:
forward-propagating a low-frequency wavefield from a shot location among the pre-defined locations,
deriving an arrival traveltime of a maximum amplitude of the low-frequency wavefield, and
applying Kirchhoff migration using the arrival traveltime and the maximum amplitude; and

outputting an image of the subsurface formation based on the migrated seismic data.