Energy partition on marine converted waves
, by Carlos A. Cunha Filho
A simple marine model, comprised of two elastic layers overlaid by water, is used to study
the four principal reflection modes present in marine seismic reflection data. The energy
distribution between the phases depends on the elastic and geometric parameters; this
dependence is evaluated as a function of offset. It is shown that the critical angle for P
waves on the first layer beneath the water, determines the lower offset limit for measurable
converted waves. Beyond this limit, the offset dependence of PSSP amplitude was found not
to be controlled by the conversion process, but instead by the subsurface properties.
STANFORD