Qi Chun-yan1,2, Li Yan-peng3, Peng Ji-xin3, Zhang Gu-lan3, Zhang Yan-bin3
1. China University of Geosciences, Beijing City, 100083, China;
2. Exploration & Development Research Institute, Daqing Oilfield, An'da City, Heilongjiang Province, 163712, China;
3. Borehole Seismic Centre, BGP Inc. of CNPC, Zhuozhou City, Hebei Province, 072751, China
Abstract：In seismic wave propagation, all frequency components of the seismic wave are subject to absorption and attenuation of the strata, high frequency components attenuate faster than low frequency components, resulting in low main frequency of the seismic records. Nowadays the popular time-frequency analysis method could get higher frequency resolution in low frequency band, while it obtains higher time resolution in high frequency band. As the variation of high frequency components is more sensitive for absorption and attenuation characteristics of the strata, during time-frequency analysis the high frequency components should have higher frequency resolution. In this paper an generalized S-transform method is introduced, it can meet the need of absorption and attenuation analysis, for the first time it can be realized without energy-loss. The application of field data shows that the method could compensate seismic wave energy and frequency which were lost due to absorption and attenuation, it is a high fidelity time-frequency analysis method.
