FREQUENCY DOMAIN FILTERING METHOD AND DEVICE OF WELLBORE WAVE IN VSP SEISMIC DATA

Disclosed are a frequency domain filtering method and device of wellbore wave in VSP seismic data. The method includes: collecting original data of VSP seismic data, and performing down-going wave leveling pretreatment on the original data by using the first break time; transforming the pretreated data into frequency domain by Fourier transform, and performing spectrum analysis to obtain each recorded amplitude spectrum; carrying out normalized mean processing on the amplitude spectra of all traces, and establishing a statistical model of the amplitude spectra; comparing the statistical model of the amplitude spectra, and correcting the amplitude spectrum of single recording until all records are processed; performing inverse Fourier transform on the processed frequency domain data to obtain time domain data of separated tube waves; carrying out energy amplitude correction on the single recording of amplitude spectrum replaced by the statistical model; and outputting data.