Vibroseis frequency blending simultaneous sweep method
To achieve low frequency sweep with conventional vibrators,the sweep length of the sweep signal needs to be extended,which leads to the decrease of production efficiency and the increase of acquisition cost.Therefore,the frequency blending simultaneous sweep method of vibrators is proposed.In this method,a long sweep signal is split into several short sweep signals for frequency blending simultaneous sweep,which realizes the transformation of vibroseis sequential single frequency sweep to multi-frequency simultaneous sweep.There are two simultaneous sweep methods.One is array simultaneous sweep with high SNR data and low blended noise.The other is independent simultaneous sweep with higher efficiency and slightly higher blended noise.Field tests have shown that the frequency blending simultaneous sweep not only has high production effi-ciency,but also low blended noise.Special deblending is not necessary in data processing,and the quality of seismic data can be greatly improved.It has been proven that the frequency blending simultaneous sweep method is a cost-effective solution for conventional vibrators low frequency sweep.
万方数据
维普
