EAGE E-Lecture: Epsilon and Delta in Anisotropic Velocity Model Building by Etienne ROBEIN


Pubblicato il 19 feb 2016


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The past is the key to the future: what we have done and we are planning to do

I membri della University of Naples Federico II SEG Student Chapter, sono lieti di invitarvi al webinar “The past is the key to the future: what we have done and we are planning to do”.

Durante l’evento, il nuovo board della SEG Student Chapter illustrerà tutte le attività che sono state svolte nel biennio 2019/2020 ed i progetti relativi a questo nuovo anno. In particolare, una parte del webinar sarà dedicata alla presentazione dei risultati preliminari relativi alle indagini geofisiche condotte durante il corso “SEG Geophysics Field Camp in Southern Italy 2020”.

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Borsa di studio in memoria del dott. Andrea Restivo sul tema: “Nuovo modello tridimensionale di velocità dell’Italia Nord-Orientale da inversione tomografica di dati sismologici ed integrazione con dati geofisici”

La ricerca oggetto della borsa rientra nell’attività istituzionale del Centro di Ricerche Sismologiche di OGS, essendo finalizzata alla definizione di un modello tridimensionale delle velocità delle onde sismiche dell’Italia Nord-Orientale.
La domanda deve essere presentata entro il 19 febbraio 2021

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28th “Gustavo Sclocchi” Theses Award Announcement

for Philosophy Doctors and University Graduates
in disciplines related to the Energy Industry

To reward outstanding university graduates specializing in areas related to the Energy Industry, SPE Italian Section (Society of Petroleum Engineers), EAGE (European Association of Geoscientists & Engineers) and Assorisorse (Sustainable Natural Resources and Energy) announce the 28th “Gustavo Sclocchi” Theses Award.

University graduates from Italian universities and Italian nationals graduated abroad who have completed their studies in the period October 1st 2019 to December 31st 2020 are entitled to submit their published thesis for the award.

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Epsilon and Delta in Anisotropic Velocity Model Building

The objective of seismic imaging is to get a sharp and accurate image of the elastic reflectivity in the subsurface, especially in complex geological settings. By ‘accurate’, we mean that reflectors should be at the right depth, but also correct lateral position.
The accuracy of a Pre-Stack Depth Migration image goes together with our ability to estimate the velocity at which waves propagate in the subsurface. To build such a Velocity Model remains a challenge because the earth is not only heterogeneous (waves propagate at different velocities at different locations), but also anisotropic (propagation velocity is a function of propagation direction).
The presentation discusses the physical meaning of Thomsen’s parameters epsilon and delta included in the Model to describe anisotropy. It illustrates a popular method to estimate them in a Pre-Stack Depth Migration project to conclude that borehole calibration is a necessary step to achieve the best accuracy possible.

This video is part of EAGE Online Education Programme.
The European Association of Geoscientists and Engineers (EAGE) is a global professional, non-profit association for geoscientists and engineers. EAGE strives to promote innovation and technical progress and aims to foster communication and cooperation between those working in, studying or interested in these fields. To learn more about EAGE Education visit www.LearningGeoscience.org

The following courses by Etienne Robein are available via EAGE:

– Seismic Imaging: A Review of the Techniques, their Principles, Merits and Limitations (EET 4)
– Seismic Depth Imaging and Anisotropic Velocity Model Building