Publication Name: AEGC 2021
Authors: Richard Barnwell, Tim Dean, Hagay Haviv, et al.
Date Published: September 2021
Number of Pages: 4
Abstract:
Hydraulic vibrators are the preferred source for land seismic surveys. The energy from the vibrator’s signal (commonly referred to as a sweep) is transmitted into the ground via a baseplate that is coupled to the surface by loading it with the weight of the vehicle. The baseplate is lowered into position by a stilt structure which continues to apply hydraulic pressure to ensure that the baseplate does not become decoupled from the surface during the sweep (the ground beneath the baseplate often becomes slightly compacted). If the vibrator is operated on a slope, or if the ground gives way in a significant and uneven manner, then the vibrator can continue to extend the stilt structure which in extreme cases can cause the vibrator to tip-over.