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dc.contributor.authorLiu, Qiancheng
dc.contributor.authorZhang, Jianfeng
dc.date.accessioned2018-11-20T13:26:56Z
dc.date.available2018-11-20T13:26:56Z
dc.date.issued2018-10-23
dc.identifier.citationLiu Q, Zhang J (2018) Efficient dip-angle angle-domain common-image gather estimation using Poynting vector in acoustic reverse time migration and its application in noise suppression. Geophysical Prospecting 66: 1714–1725. Available: http://dx.doi.org/10.1111/1365-2478.12696.
dc.identifier.issn0016-8025
dc.identifier.doi10.1111/1365-2478.12696
dc.identifier.urihttp://hdl.handle.net/10754/629915
dc.description.abstractIn reverse time migration, we can produce angle-domain common-imaging gathers in either the scattering-angle domain or the dip-angle domain. The latter, although not used as widely as the former, still provides a unique view to look into seismic imaging. The reverse time migration dip-angle angle-domain common-image gather can be computed via the subsurface offset extension, which is a bit costly in storage. We here obtain dip-angle angle-domain common-imaging gathers efficiently in acoustic reverse time migration by using the normalized Poynting vectors. Poynting vector, an indicator of the directional energy flux, is easy to compute during wavefield propagation. Similar to the subsurface-offset method, our method also has dip-angle angle-domain common-imaging gathers of blocky horizontal coherence. In the theory of local semblance analysis, the signal with better horizontal coherence has a higher semblance score, and vice versa. Based on the estimated semblance scores, we can thus design a specularity filter to preserve valid signals and suppress noises. We validate our method with two data sets. Both the Marmousi data and the real data show that our method works effectively in eliminating noises and enhancing resolution in the acoustic reverse time migration imaging.
dc.description.sponsorshipThe authors are grateful to editor Ian F. Jones and reviewer Benxin Chi and one anonymous reviewer.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/full/10.1111/1365-2478.12696
dc.rightsArchived with thanks to Geophysical Prospecting
dc.subjectAcoustic
dc.subjectImaging
dc.subjectSignal processing
dc.titleEfficient dip-angle angle-domain common-image gather estimation using Poynting vector in acoustic reverse time migration and its application in noise suppression
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalGeophysical Prospecting
dc.eprint.versionPost-print
dc.contributor.institutionInstitute of Geology and Geophysics; Chinese Academy of Sciences (IGG,CAS); Beijing China
kaust.personLiu, Qiancheng
refterms.dateFOA2018-11-20T13:28:45Z
dc.date.published-online2018-10-23
dc.date.published-print2018-11


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