DLP Webinar with René-Edouard Plessix

Visco-Acoustic Full Waveform Inversion

 

When

  Wednesday 8 November 2017 - 10.00 AM (CET)

Duration

  1 hour lecture + 30 minutes Q&A

Language

  English

Fee

  Free for EAGE members 

Requirements

  Computer with Internet connection and audio/video capabilities

 

EAGE webinars are live presentations with lecturers selected from the best presentations at EAGE Conferences. After the lecture, participants can interact with the instructor and ask questions. Joining a webinar is simple: all you need is a computer with Internet connection and audio/video capabilities (no software installation required). This service is complimentary for EAGE members and places are limited.

  

Webinar description

Acoustic full waveform inversion is nowadays an established technology to determine velocity background images from low-frequency and long-offset data sets with a focus on the diving waves. While anisotropy is often accounted for, dispersion and absorption effects are more often ignored. In this seminar, I discuss a visco-acoustic multi-parameter full waveform inversion.
After a briefly introduction on seismic attenuation and dispersion, I review a time-domain implementation of the visco-acoustic wave equation. I also briefly describe the inversion approach based on the adjoint state technique. With the help of a synthetic study, I then describe the advantages and issues we encounter when inverting for both velocity and quality factor. This synthetic study illustrates the trade-off between velocity and quality factor through sequential and simultaneous inversions. I finally present a visco-acoustic full waveform inversion on a data set recorded offshore Malaysia where gas pockets are presented in the sub-surface.

 

Participants' Profile

The seminar is of interest to people working on seismic imaging and notably on seismic full waveform inversion.

 

About the Lecturer

Rene-Edouard Plessix	René-Edouard Plessix is a civil engineer from École des Mines de Saint-Étienne and received a ph.D in applied mathematics from the university of Paris-IX Dauphine in 1996. After a year in the research center of Amoco, he joined Shell research and development center in 1998 and he is currently a principal researcher. His main activity is on geophysical imaging. He notably worked on seismic and electromagnetic modeling and inversion. His main focus is currently on seismic full waveform inversion. He also serves as associate editor of Geophysical Prospecting and Geophysical Journal International.
 

Registration CLOSED

In order to ensure an interaction of good quality and a sufficient time for questions and answers, spaces for this webinar are limited. The applications for this webinar have reached the maximum capacity and registration is now closed. 

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