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

T. Alkhalifah, P. Sava

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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 EAGE Conference and Exhibition - Workshops and Fieldtrips
PublisherEAGE Publications
ISBN (Print)9789073781870
StatePublished - Jun 13 2010
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We thank KAUST and the Center of Wave Phenomena at Colorado School of Mines for theirsupport.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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