Time-Frequency Characteristics of Sedimentary Facies Analysis with Seismic Data

Seismic data contains abundant information on underground sedimentary body. One-dimensional time domain seismic wave signal can be expanded into two-dimensional time-frequency domain by using wavelet transform time-frequency analysis method, and the spectrum clearly depict deposition cycle structure of Internal body. Through establishing of different deposition types of models, this paper analyses the change rules of sedimentary body corresponding to seismic signal in the time-frequency map with progradation, aggradation and retrogradation sedimentary environment. Practical application shows that energy group moving direction in time-frequency map is consistent with petrophysics variation. This method provides a new way of thinking and studying sedimentary cycle in non-drilling region.