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控制信噪比的反褶积方法是地震资料数字处理中兼顾分辨率和信噪比的一种有效方法。它是通过估算有效信号的功率谱,采用希尔伯特变换法或最大熵法来估算出最小相位子波的;之后用估算出的子波进行反褶积;在反褶积过程中,以信噪比的功率谱为准则,对反褶积的结果进行控制,以使信噪比高的频率成分得到保持,而信噪比低的频率成分受到压制。从而达到在控制信噪比的情况下,尽量提高记录的分辨能力。应用上述方法对永安镇地区的601.0测线进行了处理,各段剖面均有较高的信噪比和高的分辨能力。
The deconvolution method to control signal-to-noise ratio is an effective method to reconcile the resolution and signal-to-noise ratio in digital processing of seismic data. It estimates the minimum phase wavelet by estimating the power spectrum of the effective signal, using the Hilbert transform method or the maximum entropy method, and then deconvolution with the estimated wavelet. In the deconvolution process, The power spectrum of the signal-to-noise ratio is used as a guideline to control the result of the deconvolution so that the frequency component with a high signal-to-noise ratio is maintained while the frequency component with a low signal-to-noise ratio is suppressed. So as to achieve the control of signal to noise ratio in the case, try to improve the recording resolution. Applying the above method, the 601.0 survey line in Yongan Town is processed, each section has a high signal-noise ratio and high resolving power.