Abstract：As lots of great progress have been made in seismic data processing,many high-efficiency vibroseis methods have been put forward and applied in the field such as slip-sweep,distance separated simultaneous sweep (DS3),distance separated simultaneous slip sweep (DS4),high-fidelity vibroseis (HFVS),and independent simultaneous sweep (ISS). But there are somewhat some defects in them. For example,slip-sweep data is seriously affected by harmonics; ISS data may be influenced by neighboring-shots,and DS3 and DS4 need huge amounts of equipment. They affect data quality or increase acquisition cost. Therefore we propose in this paper a new approach called frequency-separated simultaneous sweep (FS3). First we divide a sweep into a few segments which are called sub-sweeps. A sub-sweep consists of a part of sweep frequency band. In this way a few vibrators can independently and simultaneously work with different sub-sweeps,and neighboring-shot interferences (crosstalk) will be eliminated or kept at a minimum level. The single shot record in one point can be reconstructed by all the sub-sweep data in this point. This method can increase energy of specific frequency band,low frequency for instance. Harmonics and crosstalk created by other high-efficiency vibroseis methods will be eliminated,and balanced energy for the seismic frequency band on records can be achieved by equaled energy output of the full sweep band.
