An adaptive multiscale algorithm for efficient extended waveform inversion
Author
Fu, Lei; Symes, William W.
Date
2017Abstract
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.
Citation
Published Version
Keyword
full-waveform inversion; velocity analysis; imaging
Type
Journal article
Publisher
Citable link to this page
https://hdl.handle.net/1911/94195Rights
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