Initial 3C-2D surface seismic and walkaway VSP results from the 2015 Brooks SuperCable experiment

Kevin W. Hall, J. Helen Isaac, Joe Wong, Kevin L. Bertram, Malcolm B. Bertram, Donald C. Lawton, Xuewei Bao and David W.S. Eaton


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.

View full article as PDF (5.92 Mb)