Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001geoji.144..105a&link_type=abstract
Geophysical Journal International, Volume 144, Issue 1, pp. 105-113.
Astronomy and Astrophysics
Astronomy
6
Anisotropy, Modelling, Traveltime
Scientific paper
In transversely isotropic media with a vertical axis of symmetry (VTI media), we represent the image in vertical time, as opposed to depth, thus eliminating the inherent ambiguity of resolving the vertical P-wave velocity from surface seismic data. In this new (x-τ)-domain, the ray tracing and eikonal equations are completely independent of the vertical P-wave velocity, with the condition that the ratio of the vertical to normal-moveout (NMO) P-wave velocity (α) is laterally invariant. Moderate size departures of α from lateral homogeneity affect traveltimes only slightly. As a result, for all practical purposes, the VTI equations in the (x-τ)-domain become dependent on only two parameters in laterally inhomogeneous media: the NMO velocity for a horizontal reflector, and an anisotropy parameter, ɛ. An acoustic wave equation in the (x-τ)-domain is also independent of the vertical P-wave velocity. It includes an asymmetric Laplacian operator to accommodate the unbalanced axis units in this new domain. In summary, we have established the basis for a full inhomogeneous time-processing scheme in VTI media that is dependent on only v and ɛ, and independent of the vertical P-wave velocity.
Alkhalifah Tariq
Biondi Biondo
Fomel Sergey
No associations
LandOfFree
The space-time domain: theory and modelling for anisotropic media does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The space-time domain: theory and modelling for anisotropic media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The space-time domain: theory and modelling for anisotropic media will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-923911