REFRACTION WAVE SNR IMPROVEMENT BASED ON SVI METHOD

The refraction wave plays an important role in the seismic exploration. However, the amplitude and the signal-to-noise ratio(SNR) of refraction are always low because of many factors, such as near-surface noise and attenuation. Supervirtual refraction interferometry(SVI) was proposed by Bharadwaj, Mallinson, etc (2011) to improve the SNR of refraction. In this article, some experiments were conducted to analyzing the resistance of SVI method to noise and the influence of the numbers of correlation and convolution traces on processing effect. It illustrates that for the data which contain a SNR greater than 0.2, the SNR can be improved a lot after implementing the SVI method as long as the requirement for number of correlation and convolution traces was met.