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本文提出了一种处理三分量宽带井间资料的方法,目的是压制尾波信号,分离开重叠在一起的波场分量。其基础是:当用小道距检波器接收,或由小炮点距震源激发时,尾波的相关度减小。具体实现方法是通过把信号变换到时间-频率域,并计算相邻射线传播信号各个时刻的瞬时相关度,得到相干波的高相干时间-频率域。由此认别出地震记录中的直达P波、S波、反射波和转换管波等不同波型。本文还提出了一种计算地震信号中不同波型初至时间的可靠方法。这种方法具有很高分辨率。
This paper presents a method of processing three-component broadband crosswell data, the purpose is to suppress the coda signal, separated from the overlapping wave field components. It is based on the fact that the coda correlates less when it is received by a small track detector or by a small shot fired from a source. The concrete method is to obtain the high coherence time-frequency domain of the coherent wave by transforming the signal into the time-frequency domain and calculating the instantaneous correlations of the signals of adjacent rays. Thus identify the direct seismogram of P wave, S wave, reflected wave and converted wave tube and other wave patterns. This paper also presents a reliable method for calculating the first arrival time of different waveforms in seismic signals. This method has high resolution.