We report the successful acquisition and subsequent processing of a zero-offset VSP in an ultra long step-out context. We simulated a subsea well with 69km worth of tie-in to the wellhead and acquired a zero-offset VSP both on DAS and with a standard wireline toolstring for comparison. Our approach combines hardware and processing strategies to tackling the long step-out challenge. We demonstrate the ability to record seismic data even at very large step-out, a requirement for subsea well monitoring.
Recording subsea VSP from your home office: Ultra-long stepout acquisition using DAS
Roux, Pierre-François, Barry, Alexander, Johnston, William, Mead, David, Baker, Mark, and John Raggio. "Recording subsea VSP from your home office: Ultra-long stepout acquisition using DAS." Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, Denver, Colorado, USA and online, September 2021. doi: https://doi.org/10.1190/segam2021-3581334.1
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