Two-step full waveform inversion of diving and reflected waves with the diffraction-angle-filtering-based scale-separation technique SCIE SCOPUS
DC Field | Value | Language |
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dc.contributor.author | Kim, Donggeon | - |
dc.contributor.author | Hwang, Jongha | - |
dc.contributor.author | Min, Dong-Joo | - |
dc.contributor.author | Oh, Ju-Won | - |
dc.contributor.author | Alkhalifah, Tariq | - |
dc.date.accessioned | 2022-03-25T00:50:08Z | - |
dc.date.available | 2022-03-25T00:50:08Z | - |
dc.date.created | 2022-03-25 | - |
dc.date.issued | 2022-05 | - |
dc.identifier.issn | 0956-540X | - |
dc.identifier.uri | https://sciwatch.kiost.ac.kr/handle/2020.kiost/42407 | - |
dc.description.abstract | Full waveform inversion (FWI) is a highly non-linear optimization problem that aims to reconstruct high-resolution subsurface structures. The success of FWI in reflection seismology relies on appropriate updates of low-wavenumber background velocity structures, which are generally driven by the diving waves in conventional FWI. On the other hand, the reflected waves mainly contribute to updating high-wavenumber components rather than low-wavenumber components. To extract low-wavenumber information from the reflected waves in addition to the diving waves, we propose a two-step FWI strategy that separates a given model into the reflectivity and background velocity models and then alternately update them using the scale-separation technique based on diffraction-angle filtering (DAF; which was proposed to effectively control wavenumber components of the FWI gradient). Our strategy first inverts the high-wavenumber reflectivity model by suppressing energy at large diffraction angles, which are necessary to compute the reflection wave paths (i.e. the rabbit-ears-shaped kernels) for low-wavenumber updates in the subsequent stage. Then, we extract low-wavenumber components due to the diving (banana-shaped kernels) and reflected waves (rabbit-ears-shaped kernels) from the gradient by suppressing energy at small diffraction angles. Our strategy is similar to reflection waveform inversion (RWI) in that it separates a given model into high- and low-wavenumber components and uses the rabbit-ears-shaped kernels for low-wavenumber updates. The main difference between our strategy and RWI is that our strategy adopts the DAF-based scale-separation technique in the space domain, which makes our algorithm of using both the banana-shaped and rabbit-ears-shaped kernels computationally attractive. By applying our two-step inversion strategy to the synthetic data for the Marmousi-II model and the real ocean-bottom cable data from the North sea, we demonstrate that our method properly reconstructs low-wavenumber structures even if initial models deviate from the true models. | - |
dc.description.uri | 1 | - |
dc.language | English | - |
dc.publisher | Geological Society by Blackwell Scientific | - |
dc.title | Two-step full waveform inversion of diving and reflected waves with the diffraction-angle-filtering-based scale-separation technique | - |
dc.type | Article | - |
dc.citation.endPage | 897 | - |
dc.citation.startPage | 880 | - |
dc.citation.title | Geophysical Journal International | - |
dc.citation.volume | 229 | - |
dc.citation.number | 2 | - |
dc.contributor.alternativeName | 황종하 | - |
dc.identifier.bibliographicCitation | Geophysical Journal International, v.229, no.2, pp.880 - 897 | - |
dc.identifier.doi | 10.1093/gji/ggab522 | - |
dc.identifier.scopusid | 2-s2.0-85143084855 | - |
dc.identifier.wosid | 000763003800011 | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.subject.keywordPlus | TRAVEL-TIME | - |
dc.subject.keywordPlus | MIGRATION | - |
dc.subject.keywordPlus | DOMAIN | - |
dc.subject.keywordPlus | GRADIENT | - |
dc.subject.keywordPlus | STRATEGY | - |
dc.subject.keywordPlus | MEDIA | - |
dc.subject.keywordAuthor | Inverse theory | - |
dc.subject.keywordAuthor | Waveform inversion | - |
dc.subject.keywordAuthor | Acoustic properties | - |
dc.subject.keywordAuthor | Body waves | - |
dc.subject.keywordAuthor | Seismic tomography | - |
dc.subject.keywordAuthor | Wave scattering and diffraction | - |
dc.relation.journalWebOfScienceCategory | Geochemistry & Geophysics | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Geochemistry & Geophysics | - |