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TitleFeasibility of time-lapse VSP monitoring at the Aquistore CO2 storage site using a distributed acoustic sensing system
AuthorHarris, K; White, D; Melanson, D; Samson, C; Daley, T M
SourceInternational Journal of Greenhouse Gas Control vol. 50, 2016 p. 248-260,
Alt SeriesEarth Sciences Sector, Contribution Series 20150496
Mediapaper; on-line; digital
File formatpdf; html
Lat/Long WENS-103.1167 -103.0333 49.1167 49.0667
Subjectsgeophysics; environmental geology; geophysical surveys; seismic methods; seismic profiles; geophone arrays; observation wells; reservoirs; carbon dioxide; Aquistore carbon storage site; carbon storage; vertical seismic profiling (VSP); distributed acoustic sensing (DAS); monitoring; data acquisition; data processing
Illustrationssketch maps; tables; seismic images; spectra; seismic profiles; profiles; bar graphs
ProgramCarbon Capture & Storage, Environmental Geoscience
AbstractThe Aquistore carbon storage project, located near Estevan, Saskatchewan, Canada, aims to employ 3D time-lapse seismic techniques to monitor injected CO2 at depths of 3100-3350 m. During early stages of the injection schedule, vertical seismic profiling (VSP) will primarily be utilized, given its inherent advantages in imaging close to the borehole. Distributed acoustic sensing (DAS) possesses the capability of providing a cost-efficient, high-resolution alternative to traditional geophone methods in VSP. In this study, an evaluation is made of baseline DAS and traditional geophone VSP data from an observation well located 150 m away from the injection well. Comparative images are analyzed for quantities of injected CO2, ranging from 27 kt to 330 kt to determine the visibility of the CO2 plume over time. The study demonstrated that DAS VSP is a feasible technique for reservoir monitoring at the Aquistore site. The CO2 plume should be visible near the borehole after 90 days (27 kt of CO2) of injection, with increasing clarity over a three-year duration.
Summary(Plain Language Summary, not published)
Time-lapse seismic monitoring is being utilized at the Aquistore CO2 storage site to track the subsurface location of the CO2 plume. A new technology (distributed acoustic sensing or DAS) has been successfully tested for seismic imaging in which an optical fibre is used as a substitute for conventional seismic sensors. Comparison of the baseline field data with simulated seismic results indicates that the CO2 plume will be well-imaged seismically. This demonstration will potentially result in CO2 monitoring with reduced effort and cost.