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VSI Versatile Seismic Imager

Modular shuttle design and acoustically isolated sensors improve borehole- and surface-seismic data quality

The VSI versatile seismic imager delivers sharper, more accurate images from borehole to surface. Tool efficiency is enhanced by

  • rapid mechanical deployment
  • very little time between stations
  • short shot-cycle time during remote-source surveys: walkaways and offset vertical seismic profiles (VSPs) 
  • real-time data processing during acquisition.

3C seismic data acquisition for superior interpretation clarity 

The modular design of the VSI imager enables flexibility in shuttle spacing on standard logging cable for acquiring three-component (3C) borehole seismic data. The small, acoustically isolated seismic sensor packages feature 3C omnitilt geophone accelerometers, with the sensors decoupled from the sonde body, for measuring the particle motion of the formation. This innovative design, along with digitization close to the sensor package, significantly reduces signal distortion by removing tool harmonic noise and tube waves from the borehole-seismic band.

Combinability for efficient seismic surveys

The decoupled configurability of the VSI imager enables long toolstrings without acoustic degradation for obtaining high-quality multilevel seismic surveys. For positioning and correlation measurements, the VSI imager can be combined with a gamma ray tool for accurate depth control and an inclinometry tool for spatial orientation.

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Noise Reduction by Design

The VSI sensor package is a decoupled from the main tool body, providing acoustic isolation and noise suppression. The caliper, shown in the extended position, can be used in either openhole or cased wells.
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