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频率滤波是目前地震勘探工作中提高信噪比的重要手段之一。它主要是利用有效波和干扰波在频谱上的差异,通过频率滤波,压制干扰波,突出有效波来提高信噪比。因此要想充分发挥频率滤波的作用,就必须首先搞清干扰波和有效波频谱的特点和差异,才能合理和正确地设计滤波因子。所以我们的工作一般是分两步,首先对原始记录进行频谱分析,然后再根据频谱分析结果,设计和计算滤波因子,进行滤波。
Frequency filtering is one of the important means to improve signal-to-noise ratio in seismic exploration. It is mainly the use of effective and interfering waves in the spectrum differences, through the frequency filter, suppress the interference wave, highlight the effective wave to improve signal to noise ratio. Therefore, in order to give full play to the role of frequency filtering, we must first find out the characteristics and differences of the interference wave and the effective wave spectrum in order to reasonably and correctly design the filter factor. So our work is generally divided into two steps, first of all the original record of the spectrum analysis, and then based on the results of spectrum analysis, design and calculation of filter factors, the filter.