The VSI versatile seismic imager delivers sharper, more accurate images from borehole to surface compared with acquisition from conventional surface seismic surveys.
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.
The new QVSI HPHT versatile seismic imager is qualified to acquire high-fidelity triaxial borehole seismic data at 500 degC and 30,000 psi. Employing the acoustically isolated sensor package design pioneered by the VSI imager, the QVSI imager is the only HP or HT seismic tool in the industry that can be configured with up to four ruggedized shuttles for simultaneous data acquisition at multiple levels.
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.
Survey efficiency is further enhanced by