Attenuating Noise in Seismic Data
AssigneeWesternGeco L.L.C.
InventorRalf Ferber
Life of this patent
Estimating the term…
Abstract
The technologies described herein include systems and methods for reducing noise in seismic data. More specifically, implementations may determine an amount of over-sampling for a frequency range of seismic data. Then, implementations may determine frequency bands based on the over-sampling. For each frequency band minimum-noise seismograms may be selected from consecutively occurring blocks of seismograms, and the remaining seismograms within each block may be discarded. The minimum-noise seismograms may then be used to reconstruct the discarded seismograms. The reconstructed seismograms may contain less noise than the original seismograms and, consequently, the seismic data may contain less noise.
Claims19
A method for attenuating noise in seismic data, comprising:
- selecting a degree of over-sampling of seismograms in the seismic data;
- splitting the seismic data into frequency bands based on the degree of over-sampling;
- for a plurality of blocks of seismograms, selecting a seismogram having the least noise from each block of seismograms;
- and
- reconstructing one or more seismograms using the selected seismograms.
A computer readable medium containing a program which, when executed, performs operations comprising:
- (a) selecting a degree of over-sampling of seismograms in the seismic data;
- (b) splitting the seismic data into a plurality of frequency bands based on the degree of over-sampling;
- and
- (c) for a plurality of blocks of seismograms:
- selecting a seismogram having the least noise from each block of seismograms in the plurality of blocks of seismograms;
- discarding unselected seismograms in each block of seismograms;
- and
- reconstructing the discarded seismograms using the selected seismograms.
A computer system, comprising:
- a processor;
- and
- memory comprising program instructions executable by the processor to:
- select a degree of over-sampling of seismograms in the seismic data;
- split the seismic data into frequency bands based on the degree of over-sampling;
- for a plurality of blocks of seismograms, select a seismogram having the least noise from each block of seismograms, wherein each block of seismograms in the plurality of blocks of seismograms comprises a number of spatially-consecutively occurring seismograms;
- and
- reconstruct one or more seismograms using the selected seismograms.
Dependencies are inferred from the claim text.