Electronic Resource
PO Box 1354, 9600 Garsington Road , Oxford OX4 2XG , UK .
:
Blackwell Science Ltd
Geophysical prospecting
52 (2004), S. 0
ISSN:
1365-2478
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
,
Physics
Notes:
The use of the differential semblance misfit function on common-image-point gathers in the angle domain lends itself to an automated tomographic approach through a gradient-based search in the model space. The velocity model is described by a layer-based model with linear velocity trends and a superimposed bicubic B-spline. The interfaces of the layer-based model are computed by map migration of the PP zero-offset traveltimes of key reflectors. The common-image-point gathers are produced by a restricted inverse generalized Radon transform or amplitude-versus-angle-compensated migration. We present a complete description of all 2.5D formulae for isotropic velocity analysis of PP reflections and the results for ocean-bottom seismic data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2478.2004.00438.x
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