Seismic source and method for single sweep intermodulation mitigation
AssigneeCggveritas Services SA
InventorJohn SALLAS
Life of this patent
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Abstract
A method for calculating intermodulation noise generated with one or more land seismic sources. The method includes receiving seismic data (g) generated by actuating the one or more land seismic source with a single sweep; selecting a number of detectors (a-f) that detect a subset (ga-gf) of the seismic data (g); estimating earth responses (ha1-hf1) based on (i) the subset seismic data (ga-gf) and (ii) a ground force (gf) of the one or more land seismic source; calculating plural intermodulation noises (noiseA1-noiseF1) for the number of detectors based on the earth responses (ha1-hf1); and removing the plural intermodulation noises (noiseA1-noiseF1) from corresponding detector signals (ga-gf) to mitigate the intermodulation noise effect.
Claims20
A method for calculating an intermodulation noise effect generated with one or more land seismic sources, the method comprising:
- receiving seismic data (g) generated by actuating the one or more land seismic source with a single sweep;
- selecting a number of detectors that detect a subset (ga-gf) of the seismic data (g);
- estimating earth responses (ha1-hf1) based on (i) the subset seismic data (ga-gf) and (ii) a ground force (gf) of the one or more land seismic source;
- calculating plural intermodulation noises (noiseA1-noiseF1) for the number of detectors (a-f) based on the earth responses (ha1-hf1);
- and
- removing the plural intermodulation noises (noiseA1-noiseF1) from corresponding detector signals (ga-gf) to mitigate the intermodulation noise effect.
A computing device for calculating an intermodulation noise effect generated with one or more land seismic sources, the computing device comprising:
- an interface for receiving seismic data (g) generated by actuating the one or more land seismic source with a single sweep;
- and
- a processor connected to the interface and configured to,
- select a number of detectors that detect a subset (ga-gf) of the seismic data (g),
- estimate earth responses (ha1-hf1) based on (i) the subset seismic data (ga-gf) and (ii) a ground force (gf) of the one or more land seismic source,
- calculate plural intermodulation noises (noiseA1-noiseF1) for the number of detectors (a-f) based on the earth responses (ha1-hf1), and
- remove the plural intermodulation noises (noiseA1-noiseF1) from corresponding detector signals (ga-gf) to mitigate the intermodulation noise effect.
A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a computer, implement a method for calculating intermodulation noise generated with one or more land seismic sources, the method comprising:
- receiving seismic data (g) generated by actuating the one or more land seismic source with a single sweep;
- selecting a number of detectors that detect a subset (ga-gf) of the seismic data (g);
- estimating earth responses (ha1-hf1) based on (i) the subset seismic data (ga-gf) and (ii) a ground force (gf) of the one or more land seismic source;
- calculating plural intermodulation noises (noiseA1-noiseF1) for the number of detectors (a-f) based on the earth responses (ha1-hf1);
- and
- removing the plural intermodulation noises (noiseA1-noiseF1) from corresponding detector signals (ga-gf) to mitigate the intermodulation noise effect.
Dependencies are inferred from the claim text.