Design and application of a Mini-SOSIE system
Chen, Z., Li, N., Zhu, Y., Zhang, Y, Long, Y., Wen, X. and Sun, F., 2017. Design and application of a Mini-SOSIE system. Journal of Seismic Exploration, 26: 521-539. The main objectives of this study were to (1) design and develop a Mini-SOSIE system, and (2) assess its performance at a test site. Mini-SOSIE is a light, portable, and nondestructive vibrator that is useful for shallow seismic exploration. During normal operation, the frequency of the vibrator is relatively periodic, leading the autocorrelation to have multiple peaks that affect the correlated shot record; i.e., there is strong interference and thus low resolution and signal-to-noise ratio (SNR). However, randomly varying the throttle using a control system can overcome the periodic nature of the vibrations. To achieve such control, we designed the system and its electronic controller, introducing a pseudo-random control scheme to the Mini-SOSIE system. Field tests verified the validity and efficacy of the designed system. The autocorrelation of the reference trace was better; its SNR was improved by 16.3 dB with respect to normal operation. The new Mini-SOSIE system design provides an alternative for shallow seismic exploration and small engineering exploration. It is also a stable reliable source that can emit a stable repeatable source waveform, which can provide high- quality field data and improve the performance of seismic exploration in the first step.
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