noise in land seismic data · 2019-08-31 · summary •land seismic data are severely undersampled...
TRANSCRIPT
Noise in land seismic data?Iga Pawelec and Paul Sava
Center for Wave Phenomena, Colorado School of Mines
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challenging land data
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challenging land data
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unique data features
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Øfine sampling
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10 m
single sensors
geophone group
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unique data features
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Øfine samplingØnear offsets
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What is this pattern?
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chirp signal
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vibroseis engine
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harmonic distortion
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sound wave
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unique data features
Øfine samplingØnear offsetsØcontinuous recording
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ambient recording:1 hour
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ambient recording:1 hour
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?
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ambient recording: 1 minute
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ambient recording: 1 minute
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ambient recording: 5 seconds
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ambient recording: 5 seconds
summary
• land seismic data are severely undersampled• “noise” represents slowly propagating waves• source generated noise is complex and non-stationary• the ambient seismic signal cannot be viewed as white noise
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acknowledgements
• Geophysical Technology Inc.• Dawson Geophysical• CSM Geophysics Field Camp crew
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