频谱调制技术

Spectrum-modulated technique.

李国发 ,牟永光 ,刘益强 ,戴东 ,张保庆 .频谱调制技术 .石油地球物理勘探 ,2 0 0 1,36 (5 ) :5 97～ 6 0 1 由于噪声、吸收等多种因素的影响 ,地震记录的频谱通常与我们所希望的频谱特征——有明显的主频、一定的带宽、光滑的衰减边界相去甚远。普通的反褶积和滤波方法很难将其调制为希望的频谱分布形态。本文在对以往的方法进行分析的基础上 ,借助于时变谱白化的思想 ,提出了一种简单、稳定且十分有效的频谱调制方法。在对大量的实际地震资料处理中 。

Spectrum of seismic records is generally far difference from spectrum characters expected by us(distinct dominant frequency, reasonable band width, smooth attenuation,etc)because of influence of multiple factors, such as noise and absorption,etc. Common used deconvolution and filtering methods are difficult to modulate it to desired distributed form of spectrum. On the basis of analyzing of idea of time varying spectral whitening, the paper presented a simple, stable and very efficient spectrum modulated method. The ideal processing results are achieved by using the method in a quantity of real seismic data processing.