Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia

Small-scale geological discontinuities are not easy to detect and image in seismic data, as these features represent themselves as diffracted rather than reflected waves. However, the combined reflected and diffracted image contains full wave information and is of great value to an interpreter, for...

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Main Authors: Bashir, Y., Ghosh, D.P., Sum, C.W.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.20860 /
Published: Springer International Publishing 2018
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045742450&doi=10.1007%2fs11600-018-0149-7&partnerID=40&md5=cdab15507467fd30a4d9b1195d32fd1d
http://eprints.utp.edu.my/20860/
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spelling utp-eprints.208602019-02-26T02:32:49Z Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia Bashir, Y. Ghosh, D.P. Sum, C.W. Small-scale geological discontinuities are not easy to detect and image in seismic data, as these features represent themselves as diffracted rather than reflected waves. However, the combined reflected and diffracted image contains full wave information and is of great value to an interpreter, for instance enabling the identification of faults, fractures, and surfaces in built-up carbonate. Although diffraction imaging has a resolution below the typical seismic wavelength, if the wavelength is much smaller than the width of the discontinuity then interference effects can be ignored, as they would not play a role in generating the seismic diffractions. In this paper, by means of synthetic examples and real data, the potential of diffraction separation for high-resolution seismic imaging is revealed and choosing the best method for preserving diffraction are discussed. We illustrate the accuracy of separating diffractions using the plane-wave destruction (PWD) and dip frequency filtering (DFF) techniques on data from the Sarawak Basin, a carbonate field. PWD is able to preserve the diffraction more intelligently than DFF, which is proven in the results by the model and real data. The final results illustrate the effectiveness of diffraction separation and possible imaging for high-resolution seismic data of small but significant geological features. © 2018, Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences. Springer International Publishing 2018 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045742450&doi=10.1007%2fs11600-018-0149-7&partnerID=40&md5=cdab15507467fd30a4d9b1195d32fd1d Bashir, Y. and Ghosh, D.P. and Sum, C.W. (2018) Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia. Acta Geophysica, 66 (3). pp. 305-316. http://eprints.utp.edu.my/20860/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Small-scale geological discontinuities are not easy to detect and image in seismic data, as these features represent themselves as diffracted rather than reflected waves. However, the combined reflected and diffracted image contains full wave information and is of great value to an interpreter, for instance enabling the identification of faults, fractures, and surfaces in built-up carbonate. Although diffraction imaging has a resolution below the typical seismic wavelength, if the wavelength is much smaller than the width of the discontinuity then interference effects can be ignored, as they would not play a role in generating the seismic diffractions. In this paper, by means of synthetic examples and real data, the potential of diffraction separation for high-resolution seismic imaging is revealed and choosing the best method for preserving diffraction are discussed. We illustrate the accuracy of separating diffractions using the plane-wave destruction (PWD) and dip frequency filtering (DFF) techniques on data from the Sarawak Basin, a carbonate field. PWD is able to preserve the diffraction more intelligently than DFF, which is proven in the results by the model and real data. The final results illustrate the effectiveness of diffraction separation and possible imaging for high-resolution seismic data of small but significant geological features. © 2018, Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences.
format Article
author Bashir, Y.
Ghosh, D.P.
Sum, C.W.
spellingShingle Bashir, Y.
Ghosh, D.P.
Sum, C.W.
Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia
author_sort Bashir, Y.
title Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia
title_short Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia
title_full Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia
title_fullStr Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia
title_full_unstemmed Influence of seismic diffraction for high-resolution imaging: applications in offshore Malaysia
title_sort influence of seismic diffraction for high-resolution imaging: applications in offshore malaysia
publisher Springer International Publishing
publishDate 2018
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045742450&doi=10.1007%2fs11600-018-0149-7&partnerID=40&md5=cdab15507467fd30a4d9b1195d32fd1d
http://eprints.utp.edu.my/20860/
_version_ 1741196407539236864
score 11.62408

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