【摘要】 通过S变换、广义S变换、短时Fourier变换和连续小波变换等地震信号时频分析方法的比较,阐明广义S 变换的高分辨率性质,模型数据试算表明算法的正确和有效性。给出基于广义S变换的波场能量——频率估算技术,提取瞬时等效吸收系数。二维实际地震数据试算表明,方法可行,可用于油气检测的研究。更多还原

【Abstract】 Time-frequency analysis of seismic signal was implemented with short-time Fourier transform (STFT), continuous-wavelet transform (CWT), and generalized S-transform (GST). The correctness and effectiveness of the algorithms were verified on model data. Comparison between STFT, CWT, and GST reveals that GST is superior in resolution. Based on the results, GST was adopted in extraction of instantaneous absorption coefficients. Satisfactory results have been achieved by applying the method to real 2-D seismic data更多还原