Application of 4D VSP for monitoring of small-scale supercritical CO2 injection: Stage 2C of CO2CRC Otway Project case study
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© 2017 European Association of Geoscientists and Engineers EAGE. All rights reserved. Time-lapse VSP seismic can be used in addition to land seismic to increase the repeatability in reservoir characterization. As a part of the monitoring program within the Stage 2C of the Otway Project, CO2CRC conducted the acquisition of offset Vertical Seismic Profile (VSP) data before injection (baseline) and three monitoring surveys after injection of every 5kT of CO2. The objective of this study is to evaluate the repeatability of 4D VSP onshore seismic and compare the results with surface seismic data. To this end, we develop an optimal workflow for VSP data processing of the CRC-1 well 2015 baseline and the 2016 monitor surveys to produce 3D migrated images of the subsurface.
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