Removing noise from a seismic measurement

摘要

A technique includes decomposing a signal that is derived from a seismic acquisition into a plurality of signals such that each signal is associated with a different frequency band. For each signal of the plurality of signals, the technique includes performing the following: decomposing the signal into subbands in successive stages, where the subbands are associated with at least different frequency ranges of the signal; selectively applying adaptive noise attenuation in between the successive stages such that the stages decompose noise-attenuated subbands; and reconstructing the signal from the subbands resulting from the decomposition. The technique includes combining the reconstructed signals.

主权项

1. A system comprising:
an interface to receive data indicative of a signal derived from a seismic acquisition; and a processor to:
decompose a signal derived from a seismic acquisition into a plurality of signals such that each signal is associated with a different frequency band;for each signal of the plurality of signals performing the following:
decompose the signal into subbands in successive stages, the subbands being associated with at least different frequency ranges of the signal;selectively apply adaptive noise attenuation during the decomposition of the signal such that the stages decompose noise-attenuated subbands; andreconstruct the signal from the subbands resulting from the decomposition; and combine the reconstructed signals, wherein:
some of the subbands resulting from the decomposition are associated with lower wavenumbers than the remaining subbands resulting from the decomposition, andthe processor is further adapted to apply the adaptive noise attenuation to the subbands that are associated with the lower wavenumbers and not apply the adaptive noise attenuation to the remaining subbands.