A new method to extend the range of low-frequency vibroseis sweeps

Abstract

There are four advantages of using low-frequency vibroseis methods in seismic exploration. Firstly, this tool can improve the desired wavelet shape through extending sweep relative bandwidth. Secondly, it can enhance the penetration of deeper strata, aiding in our ability to image subsurface structures. Thirdly, it gives us the ability to acquire broadband seismic data. Finally, the acquired lowfrequency information plays an important role in seismic data interpretation. Although this tool is useful, we are still faced with the challenge that conventional vibrators using traditional sweep signals cannot generate frequencies below 6 Hz. Therefore, in order to acquire the ideal low frequency information using conventional vibroseis methods, we need to extend the range of the low-frequency sweep signal. In this paper, we first describe the advantages of using lowfrequency vibroseis methods, and then introduce a way to design the extended low frequency vibroseis sweeps. Finally, we offer a case study as an example of the potential advantages of extended low frequency methods.