Migration velocity analysis using a transversely isotropic medium with tilt normal to the reflector dip

Tariq Alkhalifa, Paul Sava

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

Abstract

A transversely isotropic model in which the tilt is constrained to be normal to the dip (DTI model) allows for simplifications in the imaging and velocity model building efforts as compared to a general TTI model. Though this model, in some cases, can not be represented physically like in the case of conflicting dips, it handles all dips with the assumption of symmetry axis normal to the dip. It provides a process in which areas that meet this feature is handled properly. We use efficient downward continuation algorithms that utilizes the reflection features of such a model. For lateral inhomogeneity, phase shift migration can be easily extended to approximately handle lateral inhomogeneity, because unlike the general TTI case the DTI model reduces to VTI for zero dip. We also equip these continuation algorithms with tools that expose inaccuracies in the velocity. We test this model on synthetic data of general TTI nature and show its resilience even couping with complex models like the recently released anisotropic BP model.

Original languageEnglish (US)
Title of host publication72nd European Association of Geoscientists and Engineers Conference and Exhibition Incorporating SPE EUROPEC 2010, Workshops
PublisherEuropean Association of Geoscientists and Engineers, EAGE
Pages6-9
Number of pages4
ISBN (Print)9781618392244
StatePublished - Jan 1 2010
Event72nd European Association of Geoscientists and Engineers Conference and Exhibition Incorporating SPE EUROPEC 2010 - Barcelona, Spain
Duration: Jun 14 2010Jun 17 2010

Publication series

Name72nd European Association of Geoscientists and Engineers Conference and Exhibition Incorporating SPE EUROPEC 2010, Workshops

Other

Other72nd European Association of Geoscientists and Engineers Conference and Exhibition Incorporating SPE EUROPEC 2010
CountrySpain
CityBarcelona
Period06/14/1006/17/10

ASJC Scopus subject areas

  • Geochemistry and Petrology

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