Removing Smearing-Effect Artifacts in Angle-Domain Common-Image Gathers from Reverse Time Migration

Simple item page
dc.contributor.VIAF103911551 (McMechan, GA)
dc.contributor.authorJin, Huen_US
dc.contributor.authorMcMechan, George A.en_US
dc.contributor.utdAuthorJin, Huen_US
dc.contributor.utdAuthorMcMechan, George A.en_US
dc.date.accessioned2016-12-16T22:58:07Z
dc.date.available2016-12-16T22:58:07Z
dc.date.created2015-03-17en_US
dc.date.issued2015-03-17en_US
dc.description.abstractLocal plane-wave decomposition (LPWD) and local shift imaging condition (LSIC) methods for extracting angle-domain common-image gathers (ADCIGs) from prestack reverse time migration are based on the local plane-wave assumption, and both suffer from a trade-off in choosing the local window size. Small windows produce clean ADCIGs, but with low angle resolution, whereas large windows produce noisy ADCIGs, which include smearing-effect artifacts, but with high angle resolution. The cause of the smearing-effect artifacts in LPWD is the crosscorrelation of plane waves obtained by decomposition of the source and receiver wavefronts, at points that do not lie on the source wavefront excitation time trajectory. The cause of the smearing-effect artifacts in LSIC is the decomposition of curved events of offset-domain common-image gathers (ODCIGs) at incorrect depth points at zero offset. These artifacts can occur even if the migration velocity model is correct. Two methods were proposed to remove the artifacts. In the LPWD method, the smearing-effect artifacts were removed by decomposing and crosscorrelating the resulting source and receiver plane waves only at image points and excitation (image) times. In the LSIC method, the artifacts were removed by decomposing curved events in ODCIGs into planar events only at zero-offset target image points. Numerical tests with synthetic data revealed the success of the proposed methods.en_US
dc.identifier.bibliographicCitationJin, Hu, and George A. McMechan. 2015. "Removing smearing-effect artifacts in angle-domain common-image gathers from reverse time migration." Geophysics 80(3), doi: 10.1190/GEO2014-0210.1en_US
dc.identifier.issn0016-8033en_US
dc.identifier.issue3en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5174
dc.identifier.volume80en_US
dc.language.isoenen_US
dc.publisherSoc Exploration Geophysicistsen_US
dc.relation.urihttp://dx.doi.org/10.1190/GEO2014-0210.1
dc.rights©2015 Society of Exploration Geophysicistsen_US
dc.sourceGeophysics
dc.subjectGeophysics—Methodologyen_US
dc.subjectSeismologyen_US
dc.subjectImaging systems in geophysicsen_US
dc.titleRemoving Smearing-Effect Artifacts in Angle-Domain Common-Image Gathers from Reverse Time Migrationen_US
dc.type.genreArticleen_US

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
NSM-2490-4924.84.pdf
Size:
3.86 MB
Format:
Adobe Portable Document Format
Description:
Article
Download

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Society of Exploration Geophysicists.pdf
Size:
235.03 KB
Format:
Adobe Portable Document Format
Description:
Download

Collections

McMechan, George A.