Systems and methods for detecting swell noise in a seismic gather
AssigneePGS Geophysical AS
InventorMaiza Bekara
Life of this patent
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Abstract
Systems and methods for detecting swell noise in geophysical data are disclosed. In particular, the systems and methods receive seismic data as input and iteratively generate a signal mask from the seismic data. The seismic data can be generated by hydrophones or geophones. The signal mask can be used to identify traces in the seismic data that are contaminated with swell noise and identify frequencies of the contaminated traces that are contaminated with swell noise.
Claims26
A method for detecting swell noise using a programmable computer programmed to perform the operations of:
- receiving seismic data from receivers towed through a body of water;
- incrementally advancing a sliding window through the seismic data, wherein each incremental advancement of the sliding window includes:
- collecting a subset of the seismic data that lies within the sliding window;
- generating a local signal mask from the subset;
- generating an accumulated signal mask from the local signal mask;
- and
- computing a final signal mask from the accumulated signal mask, wherein the final signal mask identifies frequencies and traces of the seismic data contaminated with swell noise.
A computer system for detecting swell noise in seismic data, the computer system comprising:
- one or more processors;
- one or more computer-readable media;
- and
- a routine stored in one or more of the one or more data-storage devices and executed by the one or more processors, the routine directed to:
- incrementally advancing a sliding window through seismic data, wherein each incremental advancement of the sliding window includes:
- collecting a subset of the seismic data that lies within the sliding window;
- generating a local signal mask from the subset;
- generating an accumulated signal mask from the local signal mask;
- computing a final signal mask from the accumulated signal mask, wherein the final signal mask identifies frequencies and traces of the seismic data contaminated with swell noise;
- and
- recording the final signal mask in the one or more computer-readable media.
A non-transitory computer-readable medium having machine-readable instructions encoded thereon for enabling one or more processors of a computer system to perform the operations of
- retrieving seismic data from one or more data storage devices;
- collecting subsets of the seismic data, wherein each subset intersects at least one other subset of the seismic data;
- generating a local signal mask from each subset;
- and
- computing a final signal mask from an accumulation of the local signal masks, wherein the final signal mask identifies frequencies and traces of the seismic data contaminated with swell noise.
A method for generating a geophysical data product, the method comprising:
- obtaining seismic data;
- and
- processing the seismic data using a programmable computer that is programmed to generate the geophysical data product, wherein the processing includes
- collecting subsets of the seismic data, wherein each subset intersects at least one other subset of the seismic data;
- generating a local signal mask from each subset;
- computing a final signal mask from an accumulation of the local signal masks, the final signal mask identifies frequencies and traces of the seismic data contaminated with swell noise;
- and
- recording the final signal mask in one or more computer-readable media to generate the geophysical data product.
Dependencies are inferred from the claim text.