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Keywords: reference ray
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216331
... that the higher-order approach yields a much better extrapolation of traveltime and geometrical spreading into the paraxial region of a reference ray — for isotropic as well as anisotropic heterogeneous 3D models of an elastic medium. This is of value in mapping, modelling, and imaging, where kernel operations...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2991221
... method for computation of geometrical spreading along a given reference ray. The method yields first-order derivatives of perturbations in position/slowness and therefore enables first-order extrapolation of these quantities to points in the close (paraxial) neighborhood of the reference ray. Knowledge...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0136
... intervals. Model tests show this two-interval approximation can bring much higher accuracy compared to the generalized approximation because of the usage of an additional reference ray. The new two-interval approximation can be used instead of exact traveltimes for many practical purposes. high...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1095
... and is calculated with respect to a reference ray emerging with an elevation angle a 0 and carried to the surface by a wavefront with radius of curvature R . First, the problem is formulated in the auxiliary homogeneous medium. The resulting time of flight is then used to synchronize, via a homeomorphic...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-2929
... the anisotropy parameters and the compaction-related deviatoric stress components. seismic data hatchell compaction reservoir characterization tensor anisotropy symmetry axis reservoir compaction interface contribution reference ray excess stress sensitivity velocity change stress component...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-2366
.... reflector depth velocity structure traveltime configuration snieder receiver position heterogeneous media media sambridge reservoir characterization ray path houston 2005 upstream oil & gas reflection experiment anisotropy ray perturbation theory spetzler expression reference ray...
Proceedings Papers

Paper presented at the 1991 SEG Annual Meeting, November 10–14, 1991
Paper Number: SEG-1991-1606
... ABSTRACT No preview is available for this paper. reservoir characterization calculation ray cone upstream oil & gas trial ray receiver emergence point three-dimensional ray configuration emergence plane reference ray takeoff direction traveltime rayfield receiver line...

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