Salt flank delineation by PS interferometric imaging

Xiang Xiao, Min Zhou, Gerard Schuster

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

Abstract

We present the method of PS interferometric imaging (II) for delineating the flank of a salt dome from VSP data. Unlike traditional migration methods, interferometric PS imaging does not require the migration velocity model of the salt or upper sediments in order to image the salt flank. Synthetic elastic examples show that PS II can clearly delineate the upper and lower salt boundaries of a realistic salt body model. Results show that PS II is noticeably more accurate than the conventional migration method in the presence of static shifts and/or migration velocity errors. However, the illumination area of the PS transmitted waves is limited by the shot and geophone aperture. Thus wide shot offsets and deeper receiver wells are needed for comprehensive salt flank imaging. Interferometric imaging results for VSP data from the Gulf of Mexico demonstrate its superiority over the traditional migration method. For comparison, reduced time migration results are also presented, which are similar in quality to those obtained for interferometric imaging. We conclude that PS interferometric imaging of VSP data provides the geophysicist with a new tool by which to view salt flanks from both above and below the VSP geophone locations.

Original languageEnglish (US)
Title of host publicationSociety of Exploration Geophysicists - 75th SEG International Exposition and Annual Meeting, SEG 2005
PublisherSociety of Exploration Geophysicists
Pages2029-2032
Number of pages4
ISBN (Print)9781604236101
StatePublished - Jan 1 2005
Event75th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2005 - Houston, United States
Duration: Nov 6 2005Nov 11 2005

Publication series

NameSociety of Exploration Geophysicists - 75th SEG International Exposition and Annual Meeting, SEG 2005

Conference

Conference75th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2005
CountryUnited States
CityHouston
Period11/6/0511/11/05

ASJC Scopus subject areas

  • Geophysics

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