地震资料信噪比估计的几种方法

本文给出了计算信噪比的三种不同方法，即叠加法，时间域ＳＶＤ法和频率域ＳＶＤ法。当各道之间的地震信号波形，振幅及相位保持不变时，可利用叠加方法进行信噪比估计；当各道之间的地震信息仅存在振幅变化时，可采用时间域ＳＶＤ方法进行信噪比估算；当各道之间的地震信息既存在振幅变化，又存在相位变化时，应采用频率域ＳＶＣ法来计算信噪比。

Some methods for estimating the signal/noise ratio of seismic data

Three methods for estimating the signal/noise ratio of seismic data are recommended here,which are stack method,time-domain SVD method and frequency domain SVD meth0d (SVD: singular-value decomposition). The stack method can be used to estimate the signal/noise ratio of seismic data when the seismic signals of all traces have the same waveform, phase and amplitude. Time-domain SVD method may be taken when the seismic signals on different traces 0nly show amplitude change. Frequency-domain SVD method shou1d be adopted when seismic signals on different traces exhibit both amplitude and phase variations- Theoretical and real data processing results prove that the methods and their application environments are reasonable.