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• W1988075528 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2004Imaging overturned waves by plane‐wave migration in tilted coordinatesAuthors: Guojian ShanBiondo BiondiGuojian ShanStanford UniversitySearch for more papers by this author and Biondo BiondiStanford UniversitySearch for more papers by this authorhttps://doi.org/10.1190/1.1845328 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We image overturned waves by decomposing the source and receiver wavefields into plane‐waves. For each plane‐wave, we extrapolate the source and receiver wavefields in a tilted coordinate system and cross‐correlate them to obtain Common Image Gathers (CIGs). The tilting angle for the coordinate system is determined by the propagation direction of the plane wave. In tilted coordinates, the propagation direction is close to the extrapolation direction, so we can image steeply dipping reflectors and overturned waves with the one‐way wave equation. We can also obtain robust, dip‐dependent angle‐domain CIGs (ADCIGs) by the same method as the one employed in reverse‐time migration. These gathers provide moveout information and thus they are very important for velocity analysis on steeply dipping reflectors. Since our method is based on the one‐way wave equation and it needs no padding for imaging overturned waves as needed by reverse‐time migration, and so it is very efficient. We demonstrate our method on the Marmousi model by computing the Green's function for a point source on the surface. We also apply our method on a North Sea real dataset with overturned events.Permalink: https://doi.org/10.1190/1.1845328FiguresReferencesRelatedDetailsCited ByInline delayed-shot migration in tilted elliptical-cylindrical coordinatesJeffrey Shragge and Guojian Shan5 October 2010 | GEOPHYSICS, Vol. 75, No. 5Inline delayed‐shot migration in tilted elliptical‐cylindrical coordinatesJeff Shragge21 October 20103D plane-wave migration in tilted coordinates: A field data exampleGEOPHYSICS, Vol. 74, No. 6Angle-domain common-image gathers in generalized coordinatesGEOPHYSICS, Vol. 74, No. 3Seismic imaging and illumination with internal multiplesGeophysical Journal International, Vol. 176, No. 3A modeling study of preprocessing considerations for reverse-time migrationGEOPHYSICS, Vol. 73, No. 6Prestack wave-equation depth migration in elliptical coordinatesGEOPHYSICS, Vol. 73, No. 5Pre‐processing considerations for reverse time migrationI. F. Jones15 December 2008Application of one‐way wave‐equation migration in tilted coordinates to salt‐model building at AtlantisBertram Nolte, Imtiaz Ahmed, Patrice Mahob, David Shepherd, Ryan Faerber, and John Howie15 December 2008Velocity sensitivity of reverse‐time migrationGuojian Shan, Lin Zhang, Yue Wang, Tamas Nemeth, and Wei Liu15 December 2008Angle‐domain common‐image gathers for steep reflectorsGuojian Shan and Biondo Biondi15 December 2008Efficient FDTD algorithm for plane-wave simulation for vertically heterogeneous attenuative mediaGEOPHYSICS, Vol. 72, No. 4Prestack depth migration in elliptic coordinatesJeff Shragge and Guojian Shan14 September 20073D plane‐wave migration in tilted coordinatesGuojian Shan, Robert Clappand, and Biondo Biondi14 September 2007Optimized implicit finite‐difference migration for TTI mediaGuojian Shan14 September 2007An orthogonal one‐return wave‐equation migrationShiyong Xu and Shengwen Jin14 September 20073. Principles of Migration Using Wavefield-continuation Methods21 March 20075. Advanced Methods for Prestack Depth Migration21 March 20074. Principles of Wavefield-continuation Migration21 March 20067. Efficient Wavefield-continuation Methods for Prestack Migration21 March 20063D wavefield extrapolation in laterally‐varying tilted TI mediaGuojian Shan and Biondo Biondi7 December 2005Imaging steeply dipping reflectors in TI media by wavefield extrapolationGuojian Shan and Biondo Biondi7 December 2005Coordinate‐independent angle‐gathers for wave equation migrationPaul Sava and Sergey Fomel7 December 2005 SEG Technical Program Expanded Abstracts 2004ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2004 Pages: 2586 publication data© 2004 Copyright © 2004 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 03 Jan 2005 CITATION INFORMATION Guojian Shan and Biondo Biondi, (2004), Imaging overturned waves by plane‐wave migration in tilted coordinates, SEG Technical Program Expanded Abstracts : 969-972. https://doi.org/10.1190/1.1845328 Plain-Language Summary PDF DownloadLoading ..." @default.
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