A method for suppressing strong power frequency noise in parallel source seismic exploration data based on principal component analysis
A technology of principal component analysis and seismic exploration, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve useful signal damage, affect seismic data interpretation and migration imaging quality, phase shift, etc.
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[0029] Below in conjunction with accompanying drawing and embodiment do further detailed description:
[0030] In this example, two seismic sources are used as a group to excite. The main frequency of the Lake wavelet is 50Hz, the recording time is 1.2S, and the sampling rate is 1000. Any single channel recorded by a single shot has a frequency of 50Hz and an amplitude of 1.2, a cosine signal with a phase of 1.23 constitutes an interference channel signal.
[0031] A method for suppressing strong power frequency noise of parallel source seismic exploration data based on principal component analysis, including the following steps:
[0032] a. Conduct spectrum analysis on parallel seismic exploration data, and identify interference channels containing strong power frequency noise according to the characteristics of strong power frequency noise in the frequency spectrum with abnormally prominent amplitude and narrow frequency band, and the frequency band is around 50Hz. If there...
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