Interferometric application of static corrections.
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| Title: | Interferometric application of static corrections. |
|---|---|
| Authors: | Henley, David C.1 dhenley@ucalgary.ca |
| Source: | Geophysics. Jan/Feb2012, Vol. 77 Issue 1, pQ1-Q13. 13p. |
| Subjects: | Seismic reflection method data processing, Radiative corrections, Statics, Wave analysis, Deconvolution in seismic reflection |
| Abstract: | Correcting reflection seismic data for the effects of near-surface irregularities is a persistent problem usually addressed at least partly by static corrections applied to traces. However, there are areas where static corrections are ineffective because basic assumptions are violated. The assumptions which fail most often are surface consistency and stationarity, which are central to the concept of static corrections. To address this failure, I mapped raw seismic traces into the radial trace domain and gathered the radial traces by common surface angle. Then I imposed a more general constraint, raypath consistency, which simultaneously introduces nonstationarity. Conventional static correction also assumes implicitly that reflection events consist of single discrete arrivals. This is not true, however, in regions where near-surface multipathing and scattering complicate reflection event waveforms. Borrowing from recent work in seismic inferometry, I removed the single-arrival assumption by using trace crosscorrelations to estimate and deconvolve surface functions from traces, rather than applying time shifts. The entire crosscorrelation function is used in every case, so both timing and waveform variations are removed by the deconvolution. The operation is applied in the common-angle domain, so it is raypath consistent and nonstationary. The method, dubbed "raypath interferometry," was applied successfully to a set of 2D Arctic field data with serious surface consistency and multipath problems, and to a set of 3C 2D land data with very large S-wave receiver statics. Although intended primarily for use on seismic data tbr which conventional statics corrections fail, raypath interferometry can be used on any seismic data; its assumptions include single-arrival events and surface consistency as special cases. [ABSTRACT FROM AUTHOR] |
| Copyright of Geophysics is the property of Society of Exploration Geophysicists and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 73998590 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Interferometric application of static corrections. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Henley%2C+David+C%2E%22">Henley, David C.</searchLink><relatesTo>1</relatesTo><i> dhenley@ucalgary.ca</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geophysics%22">Geophysics</searchLink>. Jan/Feb2012, Vol. 77 Issue 1, pQ1-Q13. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Seismic+reflection+method+data+processing%22">Seismic reflection method data processing</searchLink><br /><searchLink fieldCode="DE" term="%22Radiative+corrections%22">Radiative corrections</searchLink><br /><searchLink fieldCode="DE" term="%22Statics%22">Statics</searchLink><br /><searchLink fieldCode="DE" term="%22Wave+analysis%22">Wave analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Deconvolution+in+seismic+reflection%22">Deconvolution in seismic reflection</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Correcting reflection seismic data for the effects of near-surface irregularities is a persistent problem usually addressed at least partly by static corrections applied to traces. However, there are areas where static corrections are ineffective because basic assumptions are violated. The assumptions which fail most often are surface consistency and stationarity, which are central to the concept of static corrections. To address this failure, I mapped raw seismic traces into the radial trace domain and gathered the radial traces by common surface angle. Then I imposed a more general constraint, raypath consistency, which simultaneously introduces nonstationarity. Conventional static correction also assumes implicitly that reflection events consist of single discrete arrivals. This is not true, however, in regions where near-surface multipathing and scattering complicate reflection event waveforms. Borrowing from recent work in seismic inferometry, I removed the single-arrival assumption by using trace crosscorrelations to estimate and deconvolve surface functions from traces, rather than applying time shifts. The entire crosscorrelation function is used in every case, so both timing and waveform variations are removed by the deconvolution. The operation is applied in the common-angle domain, so it is raypath consistent and nonstationary. The method, dubbed "raypath interferometry," was applied successfully to a set of 2D Arctic field data with serious surface consistency and multipath problems, and to a set of 3C 2D land data with very large S-wave receiver statics. Although intended primarily for use on seismic data tbr which conventional statics corrections fail, raypath interferometry can be used on any seismic data; its assumptions include single-arrival events and surface consistency as special cases. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Geophysics is the property of Society of Exploration Geophysicists and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1190/GEO2011-0082.1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: Q1 Subjects: – SubjectFull: Seismic reflection method data processing Type: general – SubjectFull: Radiative corrections Type: general – SubjectFull: Statics Type: general – SubjectFull: Wave analysis Type: general – SubjectFull: Deconvolution in seismic reflection Type: general Titles: – TitleFull: Interferometric application of static corrections. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Henley, David C. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan/Feb2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 00168033 Numbering: – Type: volume Value: 77 – Type: issue Value: 1 Titles: – TitleFull: Geophysics Type: main |
| ResultId | 1 |
