Synchrosqueezing transform and its applications in seismic data analysis

Liu, W., Cao, S., Liu, Y. and Chen, Y., 2016. Synchrosqueezing transform and its applications in seismic data analysis. Journal of Seismic Exploration, 25: 27-44. Time-frequency representation has been widely used in seismic data analysis because it can reveal a lot of information hidden in the seismic amplitude profiles. The short-time Fourier transform and wavelet transform are two popular methods to decompose a signal from time domain to time-frequency domain. However, the applications of both approaches are limited due to the trade-offs between time and frequency resolutions. The synchrosqueezing transform (SST) is a wavelet-based time-frequency reassignment method, which can produce an improved time-frequency resolution. In this paper, we extend the application of SST to hydrocarbon detection, ground roll suppression and random noise attenuation. In hydrocarbon detection, the SST shows high resolution in both time and frequency dimensions than continuous wavelet transform (CWT), which facilitates a better delineation of the location of low-frequency anomalies more clearly. In ground roll suppression, the SST performs better than the commonly used high-pass filtering and f-k filtering which damages the seismic reflections more or less. In random noise attenuation, the SST can be significantly more effective in both the removal of random noise and the preservation of useful reflection events compared with f-x deconvolution.
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