An approach to compensate for attenuation effects in reverse-time migration

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Strong attenuation anomalies can significantly lower the resolution of the seismic image in reduced amplitude, shifted phase, and frequency content loss. To overcome these attenuation effects thus improve the image resolution, in this study, I report a method to compensate for attenuation effects in reverse-time migration. Because attenuation effects include amplitude loss and velocity dispersion, to compensate for attenuation effects needs to take care of both. Unfortunately, conventional viscoacoustic/elastic modeling is difficult to be used for such the attenuation compensation. In contrast, I show that it is easy to implement attenuation compensation in a novel viscoacoustic wave equation by reversing the sign of the absorption operator and leaving the sign of the dispersion operator unchanged. By testing this method in several synthetic examples, I believe that the proposed attenuation compensated imaging approach is promisingly helpful to improve the resolution of seismic images.

Original languageEnglish (US)
Pages (from-to)3796-3800
Number of pages5
JournalSEG Technical Program Expanded Abstracts
Volume33
DOIs
StatePublished - Jan 1 2014
EventSEG Denver 2014 Annual Meeting, SEG 2014 - Denver, United States
Duration: Oct 26 2011Oct 31 2011

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reaction time
attenuation
Wave equations
Image resolution
Imaging techniques
Testing
image resolution
wave equation
anomaly
operators
reversing
Compensation and Redress
effect
wave equations
modeling
anomalies
loss
method

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

Cite this

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title = "An approach to compensate for attenuation effects in reverse-time migration",
abstract = "Strong attenuation anomalies can significantly lower the resolution of the seismic image in reduced amplitude, shifted phase, and frequency content loss. To overcome these attenuation effects thus improve the image resolution, in this study, I report a method to compensate for attenuation effects in reverse-time migration. Because attenuation effects include amplitude loss and velocity dispersion, to compensate for attenuation effects needs to take care of both. Unfortunately, conventional viscoacoustic/elastic modeling is difficult to be used for such the attenuation compensation. In contrast, I show that it is easy to implement attenuation compensation in a novel viscoacoustic wave equation by reversing the sign of the absorption operator and leaving the sign of the dispersion operator unchanged. By testing this method in several synthetic examples, I believe that the proposed attenuation compensated imaging approach is promisingly helpful to improve the resolution of seismic images.",
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An approach to compensate for attenuation effects in reverse-time migration. / Zhu, Tieyuan.

In: SEG Technical Program Expanded Abstracts, Vol. 33, 01.01.2014, p. 3796-3800.

Research output: Contribution to journalConference article

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AB - Strong attenuation anomalies can significantly lower the resolution of the seismic image in reduced amplitude, shifted phase, and frequency content loss. To overcome these attenuation effects thus improve the image resolution, in this study, I report a method to compensate for attenuation effects in reverse-time migration. Because attenuation effects include amplitude loss and velocity dispersion, to compensate for attenuation effects needs to take care of both. Unfortunately, conventional viscoacoustic/elastic modeling is difficult to be used for such the attenuation compensation. In contrast, I show that it is easy to implement attenuation compensation in a novel viscoacoustic wave equation by reversing the sign of the absorption operator and leaving the sign of the dispersion operator unchanged. By testing this method in several synthetic examples, I believe that the proposed attenuation compensated imaging approach is promisingly helpful to improve the resolution of seismic images.

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