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- E-ISSN: 1365-2478
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SLANT STACKING AND ITS SIGNIFICANCE FOR ANISOTROPY*
- Source: Geophysical Prospecting, Volume 34, Issue 4, Jul 1986, p. 595 - 608
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- 27 Apr 2006
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Abstract
ABSTRACT
Slant stacking transforms seismic data, recorded as a function of source‐receiver offset and traveltime, into the domain of intercept time τ and ray parameter p. The shape of the τ‐p‐curves thus obtained is closely related to the slowness surfaces of the layers. A layer‐stripping operation in the τ‐p‐domain removes all effects of the layers above the target layer. The resulting curve is equal to the slowness surface of the layer except for a scaling factor containing the thickness and dip of the layer. The slowness surface is a characteristic surface for anisotropic media. This makes the τ‐p‐domain very suitable for detecting and describing anisotropic layers. The relationship between the shape of τ‐p‐curves, the slowness surfaces, and the geometry of the layers is derived. Synthetic τ‐p‐curves calculated with the reflectivity method show some difficulties that can arise in determining the shape of the curves and in applying the stripping operation. It is shown that the effects of vertical inhomogeneity on the interpretation of τ‐p‐curves in terms of anisotropy are small.