A comprehensive strategy for removing multiples and depth imaging primaries without subsurface information

Direct horizontal common image gathers without the velocity or "ironing"

Fang Liu, Arthur B. Weglein, Kristopher A. Innanen, Bogdan Nita, Jingfeng Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

In AVO (Amplitude Variation with Offset) analysis, the amplitudes of reflected waves with different incident angles are studied to deduce lithology information beyond the structure map obtained by seismic imaging algorithms. The quantitative analysis of the amplitude, relies on common-image gathers being flat (or equivalently, at the same depth). But the waves with different incident angles will have different apparent velocities, resulting in different depths for the same image point at different angles, or non-flat common image gathers. In many scenarios, non-flat common-image gather was flattened by trim means at the cost of compromising zero-crossing and polarity-reversal information. This work presents a solution based on the seismic imaging subseries of the inverse scattering series (ISS) that flattens the common image gather without knowing or determining the subsurface velocity, and without any harmful amplitude consequencies.

Original languageEnglish
Title of host publicationSociety of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007
PublisherSociety of Exploration Geophysicists
Pages2210-2214
Number of pages5
ISBN (Print)9781604238976
StatePublished - 1 Jan 2007
Event77th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2007 - San Antonio, United States
Duration: 23 Sep 200726 Sep 2007

Publication series

NameSociety of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007

Other

Other77th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2007
CountryUnited States
CitySan Antonio
Period23/09/0726/09/07

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roots of equations
magnetic reversal
lithology
inverse scattering
reflected waves
quantitative analysis
polarity
scattering
analysis

Cite this

Liu, F., Weglein, A. B., Innanen, K. A., Nita, B., & Zhang, J. (2007). A comprehensive strategy for removing multiples and depth imaging primaries without subsurface information: Direct horizontal common image gathers without the velocity or "ironing". In Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007 (pp. 2210-2214). (Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007). Society of Exploration Geophysicists.
Liu, Fang ; Weglein, Arthur B. ; Innanen, Kristopher A. ; Nita, Bogdan ; Zhang, Jingfeng. / A comprehensive strategy for removing multiples and depth imaging primaries without subsurface information : Direct horizontal common image gathers without the velocity or "ironing". Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007. Society of Exploration Geophysicists, 2007. pp. 2210-2214 (Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007).
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abstract = "In AVO (Amplitude Variation with Offset) analysis, the amplitudes of reflected waves with different incident angles are studied to deduce lithology information beyond the structure map obtained by seismic imaging algorithms. The quantitative analysis of the amplitude, relies on common-image gathers being flat (or equivalently, at the same depth). But the waves with different incident angles will have different apparent velocities, resulting in different depths for the same image point at different angles, or non-flat common image gathers. In many scenarios, non-flat common-image gather was flattened by trim means at the cost of compromising zero-crossing and polarity-reversal information. This work presents a solution based on the seismic imaging subseries of the inverse scattering series (ISS) that flattens the common image gather without knowing or determining the subsurface velocity, and without any harmful amplitude consequencies.",
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Liu, F, Weglein, AB, Innanen, KA, Nita, B & Zhang, J 2007, A comprehensive strategy for removing multiples and depth imaging primaries without subsurface information: Direct horizontal common image gathers without the velocity or "ironing". in Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007. Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007, Society of Exploration Geophysicists, pp. 2210-2214, 77th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2007, San Antonio, United States, 23/09/07.

A comprehensive strategy for removing multiples and depth imaging primaries without subsurface information : Direct horizontal common image gathers without the velocity or "ironing". / Liu, Fang; Weglein, Arthur B.; Innanen, Kristopher A.; Nita, Bogdan; Zhang, Jingfeng.

Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007. Society of Exploration Geophysicists, 2007. p. 2210-2214 (Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007).

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

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Liu F, Weglein AB, Innanen KA, Nita B, Zhang J. A comprehensive strategy for removing multiples and depth imaging primaries without subsurface information: Direct horizontal common image gathers without the velocity or "ironing". In Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007. Society of Exploration Geophysicists. 2007. p. 2210-2214. (Society of Exploration Geophysicists - 77th SEG International Exposition and Annual Meeting, SEG 2007).