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1. (WO2018158378) COMPUTER IMPLEMENTED METHOD FOR IMPROVING A VELOCITY MODEL FOR SEISMIC IMAGING

Pub. No.:    WO/2018/158378    International Application No.:    PCT/EP2018/055066
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Fri Mar 02 00:59:59 CET 2018
IPC: G01V 1/36
Applicants: REPSOL EXPLORACIÓN, S.A.
Inventors: LARRAZÁBAL, Germán
OMANA, José
Title: COMPUTER IMPLEMENTED METHOD FOR IMPROVING A VELOCITY MODEL FOR SEISMIC IMAGING
Abstract:
The present invention is in the field of seismic imaging of underground structures. The invention is a method for solving the uncertainty and instability generated in reservoir geometries due to salt bodies which causes the presence of artifacts in the velocity fields. The method is based in a desalting process and a further specific reconstruction of the sediments located in the domain of the image. Desalting means to remove salt volumes located within the domain wherein said process is followed by the replacement of good sediment velocity values and a careful iterative process avoiding the generation of artifacts.