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1. (WO2018102814) DIVING WAVE ILLUMINATION USING MIGRATION GATHERS

Pub. No.:    WO/2018/102814    International Application No.:    PCT/US2017/064506
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Tue Dec 05 00:59:59 CET 2017
IPC: G01V 1/28
G01V 1/30
Applicants: BP CORPORATION NORTH AMERICA, INC.
Inventors: AHMED, Imtiaz
Title: DIVING WAVE ILLUMINATION USING MIGRATION GATHERS
Abstract:
A technique for estimating a depth of investigation of a seismic survey includes in various aspects a method and an apparatus. The method is for use in seismic exploration and includes: forward modeling on a subsurface attribute model of a subterranean region to generate a set of low frequency seismic data, the subsurface attribute model being generated from data representative of the subterranean region; performing a reverse time migration on the low frequency seismic data to obtain a plurality of gathers with large opening angles; stacking the gathers to yield a diving wave illumination image; and estimating a full-waveform inversion depth of investigation from the diving wave illumination image. The apparatus may include a computing apparatus programmed to perform the method and/or a program storage medium encoded with computing instructions that, when executed, perform the method.