Anisotropy signature in P-wave Extended images for VTI media

V. Li; I. Tsvankin; Tariq Ali Alkhalifah

doi:10.3997/2214-4609.201600834

Anisotropy signature in P-wave Extended images for VTI media

V. Li, I. Tsvankin, Tariq Ali Alkhalifah

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Extended images obtained from reverse-time migration (RTM) contain information about the accuracy of the velocity field and subsurface illumination at different incidence angles. Here, we evaluate the influence of errors in the anisotropy parameters on the residual moveout (RMO) in P-wave extended images obtained with RTM for VTI (transversely isotropic with a vertical symmetry axis) media. Assuming the actual spatial distribution of the zero-dip normal-moveout velocity, we analyze extended images computed with distorted fields of the parameters ? and d. Differential semblance optimization (DSO) and stackpower criteria are employed to study the sensitivity of focusing to the anisotropy parameters. The results show that the signature of ? is dip-dependent, whereas errors in d cause defocusing in extended images only if that parameter varies laterally. We also obtain and analyze the gradients of the DSO objective function with respect to the anisotropy parameters. The results of this work provide the foundation for anisotropic wavefield tomography operating with extended images.

Original language	English (US)
Title of host publication	78th EAGE Conference and Exhibition 2016
Subtitle of host publication	Efficient Use of Technology - Unlocking Potential
Publisher	European Association of Geoscientists and Engineers, EAGE
ISBN (Electronic)	9789462821859
ISBN (Print)	9789462821859
DOIs	https://doi.org/10.3997/2214-4609.201600834
State	Published - Jan 1 2016
Event	78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential - Vienna, Austria Duration: May 30 2016 → Jun 2 2016

Publication series

Name	78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential

Other

Other	78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential
Country/Territory	Austria
City	Vienna
Period	05/30/16 → 06/2/16

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the sponsors of the Center for Wave Phenomena (CWP) and competitive research funding from the King Abdullah University of Science and Technology (KAUST), Saudi Arabia.

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Access to Document

10.3997/2214-4609.201600834

Cite this

Li, V., Tsvankin, I., & Alkhalifah, T. A. (2016). Anisotropy signature in P-wave Extended images for VTI media. In 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential (78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential). European Association of Geoscientists and Engineers, EAGE. https://doi.org/10.3997/2214-4609.201600834

@inproceedings{3268b5839e25409e94ee5b4dd876e889,

title = "Anisotropy signature in P-wave Extended images for VTI media",

abstract = "Extended images obtained from reverse-time migration (RTM) contain information about the accuracy of the velocity field and subsurface illumination at different incidence angles. Here, we evaluate the influence of errors in the anisotropy parameters on the residual moveout (RMO) in P-wave extended images obtained with RTM for VTI (transversely isotropic with a vertical symmetry axis) media. Assuming the actual spatial distribution of the zero-dip normal-moveout velocity, we analyze extended images computed with distorted fields of the parameters ? and d. Differential semblance optimization (DSO) and stackpower criteria are employed to study the sensitivity of focusing to the anisotropy parameters. The results show that the signature of ? is dip-dependent, whereas errors in d cause defocusing in extended images only if that parameter varies laterally. We also obtain and analyze the gradients of the DSO objective function with respect to the anisotropy parameters. The results of this work provide the foundation for anisotropic wavefield tomography operating with extended images.",

author = "V. Li and I. Tsvankin and Alkhalifah, {Tariq Ali}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the sponsors of the Center for Wave Phenomena (CWP) and competitive research funding from the King Abdullah University of Science and Technology (KAUST), Saudi Arabia.; 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential ; Conference date: 30-05-2016 Through 02-06-2016",

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doi = "10.3997/2214-4609.201600834",

language = "English (US)",

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Li, V, Tsvankin, I & Alkhalifah, TA 2016, Anisotropy signature in P-wave Extended images for VTI media. in 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential. 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential, European Association of Geoscientists and Engineers, EAGE, 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential, Vienna, Austria, 05/30/16. https://doi.org/10.3997/2214-4609.201600834

Anisotropy signature in P-wave Extended images for VTI media. / Li, V.; Tsvankin, I.; Alkhalifah, Tariq Ali.
78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential. European Association of Geoscientists and Engineers, EAGE, 2016. (78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Anisotropy signature in P-wave Extended images for VTI media

AU - Li, V.

AU - Tsvankin, I.

AU - Alkhalifah, Tariq Ali

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the sponsors of the Center for Wave Phenomena (CWP) and competitive research funding from the King Abdullah University of Science and Technology (KAUST), Saudi Arabia.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Extended images obtained from reverse-time migration (RTM) contain information about the accuracy of the velocity field and subsurface illumination at different incidence angles. Here, we evaluate the influence of errors in the anisotropy parameters on the residual moveout (RMO) in P-wave extended images obtained with RTM for VTI (transversely isotropic with a vertical symmetry axis) media. Assuming the actual spatial distribution of the zero-dip normal-moveout velocity, we analyze extended images computed with distorted fields of the parameters ? and d. Differential semblance optimization (DSO) and stackpower criteria are employed to study the sensitivity of focusing to the anisotropy parameters. The results show that the signature of ? is dip-dependent, whereas errors in d cause defocusing in extended images only if that parameter varies laterally. We also obtain and analyze the gradients of the DSO objective function with respect to the anisotropy parameters. The results of this work provide the foundation for anisotropic wavefield tomography operating with extended images.

AB - Extended images obtained from reverse-time migration (RTM) contain information about the accuracy of the velocity field and subsurface illumination at different incidence angles. Here, we evaluate the influence of errors in the anisotropy parameters on the residual moveout (RMO) in P-wave extended images obtained with RTM for VTI (transversely isotropic with a vertical symmetry axis) media. Assuming the actual spatial distribution of the zero-dip normal-moveout velocity, we analyze extended images computed with distorted fields of the parameters ? and d. Differential semblance optimization (DSO) and stackpower criteria are employed to study the sensitivity of focusing to the anisotropy parameters. The results show that the signature of ? is dip-dependent, whereas errors in d cause defocusing in extended images only if that parameter varies laterally. We also obtain and analyze the gradients of the DSO objective function with respect to the anisotropy parameters. The results of this work provide the foundation for anisotropic wavefield tomography operating with extended images.

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BT - 78th EAGE Conference and Exhibition 2016

PB - European Association of Geoscientists and Engineers, EAGE

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Y2 - 30 May 2016 through 2 June 2016

ER -

Li V, Tsvankin I, Alkhalifah TA. Anisotropy signature in P-wave Extended images for VTI media. In 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential. European Association of Geoscientists and Engineers, EAGE. 2016. (78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential). doi: 10.3997/2214-4609.201600834

Anisotropy signature in P-wave Extended images for VTI media

Abstract

Publication series

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Bibliographical note

ASJC Scopus subject areas

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