Multiparametric traveltime inversions

In conventional seismic processing, the classical algorithm of Hubral and Krey is routinely applied to extract na initial macrovelocity model that consists of a stack of homogeneous layers bounded by curved interfaces. Input for the algorithm are 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 na advantageous use of previously obtained common reflection surface (CRS) attributes as its input, and (b) it also allows for gradient layer velocity 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 implementations of the method.