Matching-filter based extended full waveform inversion

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Extended waveform inversion provides an effective way to mitigate cycle skipping that usually occurs in conventional full waveform inversion (FWI), resulting in an inaccurate local minimum model. A matching filter between the predicted and observed data can provide an additional degree of freedom to avoid the cycle skipping. We extend the search space to treat the matching filter as an independent variable that we use to bring the compared data within a half cycle to obtain accurate direction of velocity updates. In this case, the objective function with a reasonable penalty parameter has a larger region of convexity compared to conventional FWI. The normalization of the data can bring us an equivalent normalization of the filter, and a more effective convergence. A Marmousi example demonstrates these features.
Original languageEnglish (US)
Title of host publication81st EAGE Conference and Exhibition 2019
PublisherEAGE Publications BV
ISBN (Print)9789462822894
DOIs
StatePublished - Aug 26 2019

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