A transversely isotropic medium with a tilted symmetry axis normal to the reflector

Handle URI:
http://hdl.handle.net/10754/575670
Title:
A transversely isotropic medium with a tilted symmetry axis normal to the reflector
Authors:
Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 ) ; Sava, Paul C.
Abstract:
The computational tools for imaging in transversely isotropic media with tilted axes of symmetry (TTI) are complex and in most cases do not have an explicit closed-form representation. Developing such tools for a TTI medium with tilt constrained to be normal to the reflector dip (DTI) reduces their complexity and allows for closed-form representations. The homogeneous-case zero-offset migration in such a medium can be performed using an isotropic operator scaled by the velocity of the medium in the tilt direction. For the nonzero-offset case, the reflection angle is always equal to the incidence angle, and thus, the velocities for the source and receiver waves at the reflection point are equal and explicitly dependent on the reflection angle. This fact allows for the development of explicit representations for angle decomposition as well as moveout formulas for analysis of extended images obtained by wave-equation migration. Although setting the tilt normal to the reflector dip may not be valid everywhere (i.e., on salt flanks), it can be used in the process of velocity model building, in which such constrains are useful and typically are used. © 2010 Society of Exploration Geophysicists.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Environmental Science and Engineering Program; Earth Science and Engineering Program
Publisher:
Society of Exploration Geophysicists
Journal:
Geophysics
Issue Date:
May-2010
DOI:
10.1190/1.3409114
Type:
Article
ISSN:
00168033
Sponsors:
We are grateful to KAUST and to the sponsors of the Center for Wave Phenomena at Colorado School of Mines for their support. We thank the associate editor and the reviewers for their critical review of this paper.
Appears in Collections:
Articles; Environmental Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorAlkhalifah, Tariq Alien
dc.contributor.authorSava, Paul C.en
dc.date.accessioned2015-08-24T08:35:31Zen
dc.date.available2015-08-24T08:35:31Zen
dc.date.issued2010-05en
dc.identifier.issn00168033en
dc.identifier.doi10.1190/1.3409114en
dc.identifier.urihttp://hdl.handle.net/10754/575670en
dc.description.abstractThe computational tools for imaging in transversely isotropic media with tilted axes of symmetry (TTI) are complex and in most cases do not have an explicit closed-form representation. Developing such tools for a TTI medium with tilt constrained to be normal to the reflector dip (DTI) reduces their complexity and allows for closed-form representations. The homogeneous-case zero-offset migration in such a medium can be performed using an isotropic operator scaled by the velocity of the medium in the tilt direction. For the nonzero-offset case, the reflection angle is always equal to the incidence angle, and thus, the velocities for the source and receiver waves at the reflection point are equal and explicitly dependent on the reflection angle. This fact allows for the development of explicit representations for angle decomposition as well as moveout formulas for analysis of extended images obtained by wave-equation migration. Although setting the tilt normal to the reflector dip may not be valid everywhere (i.e., on salt flanks), it can be used in the process of velocity model building, in which such constrains are useful and typically are used. © 2010 Society of Exploration Geophysicists.en
dc.description.sponsorshipWe are grateful to KAUST and to the sponsors of the Center for Wave Phenomena at Colorado School of Mines for their support. We thank the associate editor and the reviewers for their critical review of this paper.en
dc.publisherSociety of Exploration Geophysicistsen
dc.titleA transversely isotropic medium with a tilted symmetry axis normal to the reflectoren
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalGeophysicsen
dc.contributor.institutionColorado School of Mines, Center for Wave Phenomena, Golden, United Statesen
kaust.authorAlkhalifah, Tariq Alien
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