Boosting signal to noise ratio of seismic signals using the phased-array vibrator system

When noise in the field is very strong, we can not get data with proper signal to noise ratio (SNR) even if combination vibroseis is used. To solve this problem we propose to apply a phased-array vibrator, which can form a directional seismic wave. We have made numerical simulation of multi-track seismograms and computed reflected waves' SNR for combination and phased-array sources in a given horizontal stratified model. The result shows that the average SNR of reflected waves increases 1.54 similar to 9.90 dB respectively than the combination source when the 4, 8, 15 and 20-unit phased-array vibrators are used. We conclude that the phased-array source is competent to improve seismic signal SNR. Moreover, the phased-array source can boost SNR obviously when more vibrators are applied but there is no similar result for the combination source.