Resolution of small velocity anomalies by wide azimuth reflection data tomography

Allon Bartana, Dan Kosloff, Per Riste, Yasha Vilenchik

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

Abstract

Seismic velocity determination has suffered from insufficient coverage of the data acquisition. For this reason only smooth long wave length components of the velocity variation can be reliably recovered. A theoretical study has shown that multi azimuth data has the potential to significantly improve velocity determination. In this study we examine the capability of multi azimuth acquisition in resolving small velocity anomalies by means of a 3D synthetic example. The model consists of a layered structure which contains two small velocity anomalies. The study compares the resolution when the migrated gathers contain no azimuthal information to the case when the gathers are binned both according to offset and azimuth. The results show that conventional gathers can only obtain a blurred image of the velocity anomalies, whereas with multi azimuth gathers the velocity anomalies appear distinctly.

Original languageEnglish
Title of host publication79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009
PublisherSociety of Exploration Geophysicists
Pages4059-4063
Number of pages5
ISBN (Print)9781615675661
DOIs
StatePublished - 2009
Event79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009 - Houston, United States
Duration: 25 Oct 200930 Oct 2009

Publication series

Name79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009

Conference

Conference79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009
Country/TerritoryUnited States
CityHouston
Period25/10/0930/10/09

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