Abstract：The seismic wave excited by seismic exploration source has initial frequency bandwidth characteristic,before the signal of the seismic wave was finally received and recorded by seismic instrument,it dispersed and had been absorbed by subsurface media,then it was modified by geophone ground coupling and was transformed by sensitive elements,at last it was regulated by post-simulation signal and was rebuilt by A/D conversion and other processes,the energy distribution of the seismic signal is mainly in the low dominant frequency band,the dual-energy and dual-channel seismic acquisition technology which is based on one time source excitation,could simultaneously acquire seismic records in both low dominant frequency band and high dominant frequency band in a coordinate point,so that it could fully utilize both the sensitivity and dynamic range of the geophone,the dynamic range of the subsequently used analog circuits and elements of the digital circuits.Adequate gaining and signal regulation circuits were used for low frequency channel to acquire low frequency broadband data,while the high frequency geophone or high frequency filters and high frequency compensation circuits were used for high frequency channel to obtain the high frequency broadband data.By using the technology the low dominant frequency signal could be fully acquired in traditional seismic exploration,while the extreme limit exploration depth for the seismic instrument could be maximized,the energy signals from the two frequency bands could be correlated and referred with each other,so that the accuracy of the seismic interpretation and processing could be raised.
