Patent ID: 6021092
Filing Date: 2000-02-01
Classification: G01V

Abstract:
A method for deterinining surface consistent water bottom reflectivities from dual sensor seismic data, comprising the steps of:combining pressure signals and velocity signals to generate combined signals, said combined signals having signal components representing downwardly-traveling energy substantially removed, said pressure and velocity signals corresponding to seismic waves generated at each of at least one source location n in a water layer and detected by co-located pressure and velocity receivers at each of at least one receiver location m in said water layer, said combined signals corresponding to each pairing of source location n and receiver location m;transforming said combined signals from a time domain to a frequency domain to generate transformed signals:,calculating an inverse split Backus filter for each of said transformed signals, and multiplying each of said transformed signals by a corresponding inverse Backus filter to generate filtered signals; andapplying an optimization algorithm to said filtered signals to determine said water bottom reflectivity values R.sub.n and R.sub.m at said each of at least one source location n and said each of at least one receiver location m, respectively.