Migration velocity analysis using a transversely isotropic medium with tilt normal to the reflector dip
Type
Conference PaperAuthors
Alkhalifah, T.Sava, P.
Date
2010-06-13Permanent link to this record
http://hdl.handle.net/10754/598836
Metadata
Show full item recordAbstract
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.Citation
Alkhalifah T, Sava P (2010) Migration velocity analysis using a transversely isotropic medium with tilt normal to the reflector dip. 72nd EAGE Conference and Exhibition - Workshops and Fieldtrips. Available: http://dx.doi.org/10.3997/2214-4609.20149901.Sponsors
We thank KAUST and the Center of Wave Phenomena at Colorado School of Mines for theirsupport.Publisher
EAGE Publicationsae974a485f413a2113503eed53cd6c53
10.3997/2214-4609.20149901