Diffraction traveltime approximation for TI media with an inhomogeneous background

Handle URI:
http://hdl.handle.net/10754/562953
Title:
Diffraction traveltime approximation for TI media with an inhomogeneous background
Authors:
Waheed, Umair bin ( 0000-0002-5189-0694 ) ; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 ) ; Stovas, A.
Abstract:
Diffractions in seismic data contain valuable information that can help improve our modeling capability for better imaging of the subsurface. They are especially useful for anisotropic media because they inherently possess a wide range of dips necessary to resolve the angular dependence of velocity. We develop a scheme for diffraction traveltime computations based on perturbation of the anellipticity anisotropy parameter for transversely isotropic media with tilted axis of symmetry (TTI). The expansion, therefore, uses an elliptically anisotropic medium with tilt as the background model. This formulation has advantages on two fronts: first, it alleviates the computational complexity associated with solving the TTI eikonal equation, and second, it provides a mechanism to scan for the best-fitting anellipticity parameter η without the need for repetitive modeling of traveltimes, because the traveltime coefficients of the expansion are independent of the perturbed parameter η. The accuracy of such an expansion is further enhanced by the use of Shanks transform. We established the effectiveness of the proposed formulation with tests on a homogeneous TTI model and complex media such as the Marmousi and BP models.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program; Environmental Science and Engineering Program
Publisher:
Society of Exploration Geophysicists
Journal:
Geophysics
Issue Date:
Sep-2013
DOI:
10.1190/GEO2012-0413.1
Type:
Article
ISSN:
00168033
Sponsors:
We would like to thank KAUST and ROSE project for financial support. We also extend thanks to BP for releasing the benchmark synthetic model. We acknowledge useful discussions with David Ketcheson on implementing the TTI eikonal solver. We are extremely grateful to Claudia Vanelle, Stig-Kyrre Foss, Zvi Koren, and Sergius Dell for useful reviews that improved the quality of the 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.authorWaheed, Umair binen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.contributor.authorStovas, A.en
dc.date.accessioned2015-08-03T11:16:50Zen
dc.date.available2015-08-03T11:16:50Zen
dc.date.issued2013-09en
dc.identifier.issn00168033en
dc.identifier.doi10.1190/GEO2012-0413.1en
dc.identifier.urihttp://hdl.handle.net/10754/562953en
dc.description.abstractDiffractions in seismic data contain valuable information that can help improve our modeling capability for better imaging of the subsurface. They are especially useful for anisotropic media because they inherently possess a wide range of dips necessary to resolve the angular dependence of velocity. We develop a scheme for diffraction traveltime computations based on perturbation of the anellipticity anisotropy parameter for transversely isotropic media with tilted axis of symmetry (TTI). The expansion, therefore, uses an elliptically anisotropic medium with tilt as the background model. This formulation has advantages on two fronts: first, it alleviates the computational complexity associated with solving the TTI eikonal equation, and second, it provides a mechanism to scan for the best-fitting anellipticity parameter η without the need for repetitive modeling of traveltimes, because the traveltime coefficients of the expansion are independent of the perturbed parameter η. The accuracy of such an expansion is further enhanced by the use of Shanks transform. We established the effectiveness of the proposed formulation with tests on a homogeneous TTI model and complex media such as the Marmousi and BP models.en
dc.description.sponsorshipWe would like to thank KAUST and ROSE project for financial support. We also extend thanks to BP for releasing the benchmark synthetic model. We acknowledge useful discussions with David Ketcheson on implementing the TTI eikonal solver. We are extremely grateful to Claudia Vanelle, Stig-Kyrre Foss, Zvi Koren, and Sergius Dell for useful reviews that improved the quality of the paper.en
dc.publisherSociety of Exploration Geophysicistsen
dc.titleDiffraction traveltime approximation for TI media with an inhomogeneous backgrounden
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.identifier.journalGeophysicsen
dc.contributor.institutionNorwegian University of Science and Technology (NTNU), Department of Petroleum and Applied Geophysics, Trondheim, Norwayen
kaust.authorWaheed, Umair binen
kaust.authorAlkhalifah, Tariq Alien
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