| Full text | |
| Author(s): |
Biloti‚ R.
;
Santos‚ L.T.
;
Tygel‚ M.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | STUDIA GEOPHYSICA ET GEODAETICA; v. 46, n. 2, p. 177-192, 2002. |
| Abstract | |
In conventional seismic processing, the classical algorithm of Hubral and Krey is routinely applied to extract an initial macrovelocity model that consists of a stack of homogeneous layers bounded by curved interfaces. Input for the algorithm are identified primary reflections together with normal moveout (NMO) velocities, as derived from a previous velocity analysis conducted on common midpoint (CMP) data. This work presents a modified version of the Hubral and Krey algorithm that is designed to extend the original version in two ways, namely (a) it makes an advantageous use of previously obtained common-reflection-surface (CRS) attributes as its input and (b) it also allows for gradient layer velocities in depth. A new strategy to recover interfaces as optimized cubic splines is also proposed. Some synthetic examples are provided to illustrate and explain the implementation of the method. (AU) | |