A 3C walkaway VSP and surface seismic experiment was conducted at the Containment and Monitoring Institute (CaMI) Field Research Station (FRS) in May of 2015. Two parallel NE-SW receiver lines were laid out with one line centered on well CMCRI COUNTESS 10-22-17-16, and the other offset 100 m to the northwest. Both receiver lines had single-component SM-24 geophones at a 10 m receiver spacing. In addition, the receiver line centered on the well had three-component SM-7 geophones at a 30 m receiver spacing. A three-component ESG SuperCable was deployed in the well at three different levels, giving receiver positions in the well from 106 to 496 meters depth at a 15 m spacing.
Two source lines were acquired three times, once for each tool position in the well. The source was an IVI EnviroVibe sweeping from 10-200 Hz over 16 s. The NE-SW source line had a Vibe Point (VP) every 10 m, offset to the NW of the surface receiver locations, for a walkaway VSP. A semi-circular source line with a radius of 400 m and a VP every five degrees was acquired for a velocity tomography study. Finally, the NE-SW source line was re-acquired using a variety of M-sequence sweeps as the SuperCable was removed from the well. This report presents a first look at the data and some early results.
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