CCS Monitoring by Inversion of Reservoir Pressure and Saturation Changes from Timelapse AVO Differences and Time-Shifts
conference paper
The main storage-related challenges for accelerated deployment of CCS are capacity, confidence and cost. These challenges are to be addressed by amongst others focusing on improving strategies for monitoring and management of the pore pressure distribution in the CO2 storage reservoir. Pressure-driven decision support protocols are to be developed for safe and cost-effective reservoir monitoring. These protocols will enable the operator to maximize CO2 storage capacity and quickly turn monitoring data which suggest non-conformance into plans for corrective actions. A new extended method is developed for inverting and de-noising reservoir pressure and water saturation changes from timelapse AVO differences and time-shifts for the purpose of CCS monitoring and conformance. Detailed reservoir pressure and saturation fronts are obtained for 4D data in the Norwegian offshore, honoring reservoir compartments and fault boundaries found in comparative studies. Application on a CCS candidate field offshore Norway is currently being researched in a synthetic study for purposes of benchmarking, pre-storage analysis, monitoring plans and conformance studies. If back-estimation of pressure and saturation changes is successful, the results for field data become substantially more credible and allow for 4D seismic history matching.
Topics
BenchmarkingCarbon captureCost effectivenessDecision support systemsDigital storageMonitoringOffshore oil well productionReservoir managementCO2 storageCost effectiveDecision supportsMonitoring and managementOffshoresPore-pressure distributionPressure-drivenReservoir pressuresStorage reservoirsTime shiftsCarbon dioxide
TNO Identifier
968055
ISBN
9781713841449
Publisher
European Association of Geoscientists and Engineers, EAGE
Source title
82nd EAGE Conference and Exhibition 2021, 82nd EAGE Conference and Exhibition 2021, 18 October 2021 through 21 October 2021
Pages
2342-2346
Files
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