Method for denoising seismic data from a seafloor array

摘要

A method for denoising seismic data from a seafloor array with several hydrophones and several seismic receivers, each seismic receiver comprising three mutually orthogonal motion sensors. The method comprises the steps of: transforming (110, 115) recorded motion data (111) from the seismic receivers and recorded hydrophone data (116) from the hydrophones into a transform domain where acoustic sources are separated; and matching (120) transformed hydrophone data (117) to transformed motion data (112), thereby obtaining matched hydrophone data (121). The separated sources enable more reliable automatic filtering and matching than similar processing in the TX domain. The method further comprises the steps of: performing an inverse transform (130) of the matched hydrophone data (121), thereby obtaining matched P-wave data (131) in the TX domain; and subtracting the matched P-wave data (131) from the recorded motion data (111), thereby obtaining enhanced motion data (141) in the TX domain. Coherent noise transferred through the seafloor can be removed in a later step.