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

 

Pubblicato il 19 feb 2016

https://www.youtube.com/watch?v=gjuKMx6uzHM

More About ….

EAGE – NEAR SURFACE GEOSCIENCE 2022

On behalf of the EAGE Near Surface Geoscience Division, I cordially invite you to attend the Near Surface Geoscience Conference & Exhibition to be held in Belgrade, Serbia from 18-22 September 2022.

We are pleased to announce that after our successful virtual conference in 2020 and our first ever hybrid in Bordeaux in 2021, we will return in-person to Belgrade and host it for the first time there. For the NSG2022, we’ll introduce the first of its kind or rebranded 3rd Conference on Airborne, Drone and Robotic Geophysics along with the 28th European Meeting of Environmental and Engineering Geophysics, and the 4th Conference on Geophysics for Mineral Exploration and Mining in this attractive region of Europe.

read more

29th “GUSTAVO SCLOCCHI AWARD” CEREMONY

The Gustavo Sclocchi Award is a joint initiative between EAGE, SPE Italia, Society of Petroleum Engineers – Italian Section and Assorisorse, an Italian Sustainable Energy & Resources Industry Association to reward excellent university graduates in energy related disciplines.

read more

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