【摘要】 地震时频分析是通过对地震信号采用多种数学变换,实现从时频域角度对信号的局部特征进行分解,剖析信号细微特征所对应的地层结构。在应用地震时频分析技术过程中,人们对于这项技术能否真正有效地解决实际地质问题存在许多争论。本文从时频原理综合分析的角度出发,对地震道时频谱中各种频率特性参数和时频旋回直接转化成对地层结构逐级、分步的解析方法进行了较深入的探讨。研究认为时频分析原理不仅是对地震数据进行特殊数学变换,实现对信号的分解,而且充分利用了地层厚度的调谐效应及岩性调谐效应;时频谱与地质结构特征之间的良好响应关系为地震地质精细解释提供了直观的依据。更多还原

【Abstract】 Seismic time-frequency analysis is using multiple mathematic transform on seismic signals and realizing decomposition of local feature of signals from the angle of time-frequency domain, analyzing stratigraphic structure associated to fine feature of signals. In a process of using the seismic time-frequency analysis, the people have a lot of argument about whether the technique can truly and effectively solve the real geologic problems. From the angle of comprehensive analysis of time-frequency principle, the paper implemented deeper discussion about the analytic approach that directly transforms the various frequency parameters and time-frequency cycle in time-frequency spectrum of seismic traces into stratigraphic structure step by step. The study considered that the time-frequency analysis principle not only is special mathematic transform on seismic data, realizing the signal decomposition, but also fully uses the tuning effects of both stratigraphic thickness and lithology. The good response relationship between time-frequency spectrum and geologic structural feature provides straightforward foundation for seismic-geologic fine interpretation.更多还原