Interactive velocity analysis exercises
, by Jean-Claude Dulac
Stacking velocity analysis is performed by computing a coherency functional along hyperbolic
trajectories. The properties of semblance, normalized mean, correlation, skewness and
trimmed semblance are compared using an interactive program. Tests on a field common
midpoint gather show that trimmed semblance gives better results than the other coherency
functionals because it suppresses erratic data values. Furthermore the use of trimmed stack
has improved the stack section of a real dataset with respect to mean stack.
STANFORD