An adaptive multiscale algorithm for efficient extended waveform inversion

Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Exploration Geophysicists
Description
Abstract

Subsurface-offset extended full-waveform inversion (FWI) may converge to kinematically accurate velocity models without the low-frequency data accuracy required for standard data-domain FWI. However, this robust alternative approach to waveform inversion suffers from a very high computational cost resulting from its use of nonlocal wave physics: The computation of strain from stress involves an integral over the subsurface offset axis, which must be performed at every space-time grid point. We found that a combination of data-fit driven offset limits, grid coarsening, and low-pass data filtering can reduce the cost of extended inversion by one to two orders of magnitude.

Description
Advisor
Degree
Type
Journal article
Keywords
Citation

Fu, Lei and Symes, William W.. "An adaptive multiscale algorithm for efficient extended waveform inversion." Geophysics, 82, no. 3 (2017) Society of Exploration Geophysicists: R183-R197. http://dx.doi.org/10.1190/geo2016-0426.1.

Has part(s)
Forms part of
Rights
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Link to license
Citable link to this page