Patent ID: 8315124
Filing Date: 2012-11-20
Classification: G01V

Abstract:
1. A system for modeling seismic wave-field data in order to suppress near-surface and sub-surface related multiples from reflection signals that include main primary reflection signals, main random noise signals, main multiple reflection signals, residual primary reflection signals, residual random noise signals, and residual multiple reflection signals, the system comprising a computer to receive such data, said computer being programmed to: a. model main random noise and separate main random noise signals from the reflection signals using a frequency-wavenumber domain method to provide data having suppressed main random noise signals; b. model main primary reflection signals and separate main primary reflection signals from the data having suppressed main random noise using both frequency-wavenumber filtering in a frequency-wavenumber domain and weighted median filtering in a time-offset domain to provide data having suppressed main random noise and suppressed main primary reflections; c. model multiple reflection signals using parabolic path summation on the data having suppressed main random noise and main primary reflections; and d. subtract the modeled multiple reflection signals from the collected or stored reflection signal to provide seismic wave-field data having suppressed multiple reflections.