Borehole Seismic
SHock Borehole Source
Main features:
- P and SH wave generation
- Suitable for CST and VSP
- High frequency repeatable signal
- Operations in dry and water-filled wells
- HV slip ring on the winch
SHock is a unique borehole source, which is designed for generating horizontally polarised Shear Waves (SH) and Compressional Waves (P) for reversed Vertical Seismic Profiling (VSP) and Crosshole Seismic Testing or Tomography (CST). SHock is an easy-to-operate high-repeatable seismic source, which can be used both in dry and water-filled wells in combination with energy source Jack.
A rigid pneumo-electric line provides accurate source rotation in the well for generating shots with opposite SH-wave polarization for further signal-to-noise ratio enhancement during the processing and possibility to clearly identify S-waves by reversed polarity. Due to its electrodynamical nature, SHock generates high frequency energy pulse, which results in high resolution seismic gathers suitable for very accurate first break picking and providing very detailed VSP seismic sections.
To provide fast infield seismic borehole acquisition, SHock source is supplied on a reel with a high-voltage slip ring and pneumatic fitting. It allows to acquire seismic data without need of disconnecting the energy source and compressor during winding the cable.
SHock standard set includes:
- SHock source
- Pneumo-electric line
- Reel with high-voltage slip ring
- Reel and energy source connection wire
- Air compressor (option)
To perform CST on P and S waves following equipment is required:
- Energy source Jack
- GStreamer with the seismograph (DAQlink 4)
- RadExPro for data processing and ZondST2d/ZondST3d for tomography inversion
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