| Popis: |
Summary In near-surface seismic surveys, there are several complex structures that increase the challenge to perform a reliable stratigraphic characterization. A geological structure with a layer which presents an abnormally low velocity increases the difficulty during the seismic processing. To overcome this kind of problem, we propose an analysis of the seismic data during the velocity analysis step in order to detect an abnormally low velocity of a layer by using a nonhyperbolic multiparametric travel-time approximation. With this analysis, it is possible to estimate which layer of the formation has an abnormally low velocity and its spatial position. |
