基于广义S变换的主频率分析

基于常规的主参数分析原理,从高精度时频分析的角度出发,采用广义S变换进行计算,提出了一种新的基于广义S变换的主频率分析方法。该方法采用窗函数可变的广义S变换进行计算,不仅具有一定的抑制噪声的能力,而且充分利用了广义S变换分辨薄层的能力。实际资料的计算结果表明,该方法得到的主频率剖面不仅有效地突出了弱反射同向轴,有利于反射同向轴的对比追踪,而且具有很强的分辨薄层的能力,得到的主频率剖面具有很高的纵向分辨率,有利于地震资料的精细处理和解释。

Dominating Frequency Analysis Based on Generalized S Transform

Based on the theory of conventional dominating parameter analysis and generalized S transform,the paper proposes a new dominating parameter analysis method from the point of high accuracy time-frequency analysis.Applying the generalized S transform with arbitrary and varying window function,the new method has strong ability of restraining noise and distinguishing thin layers.Results of practical experiments prove the correctness and validity of the new method.The ultimate dominating frequency profiles not only can effectively improve weak seismic reflection,which is benefit to lay tracing,but also have high longitudinal resolution,which is benefit for the seismic data to be carefully processed and interpreted.