CO2 Geological Storage from 8 Years of DynamicInjection at the Aquistore CO2 Storage SiteRick ChalaturnykUniversity of Alberta and GeoVer Inc.Abstract:Do not underestimate the complexity of CO2 injection behaviour for full scale projectsThe Aquistore CO2 Storage Project is an integral component of SaskPower’s Boundary DamCO2 Capture Project located in southeastern Saskatchewan, Canada. Operational synergiesbetween the capture facility (supply) and CO2-EOR (demand) also require excess CO2 to betransported via pipeline to the Aquistore site where it is injected into a hyper-saline fluid filledsandstone formation at approximately 3300 m depth. The reservoir temperature is approximately120 °C, and average reservoir pressure is 35 MPa. Preliminary laboratory measurements oncore plugs gave average values of porosity and permeability, 6% and 5 mD respectively. TheAquistore site includes one injection well and one observation well approximately 150m offsetfrom the injection well. Both wells are completed with various measurement and monitoringequipment, including distributed temperature sensing lines (DTS), distributed acoustic sensingline (DAS) and tubing/casing-conveyed pressure gauges at different levels to measure pressureand temperature changes downhole during to CO2 injection.This presentation focuses on dynamic responses that have been recorded since the completionof the CO2 injection well and the start of CO2 injection began on April 16, 2015 and discussesissues ranging from well integrity to reservoir simulation to seismic monitoring. Thisunprecedented opportunity to collect monitoring data on the dynamics of phase changes (i.e.supercritical to liquid to gas phase shifts) from the wellhead to the geological formationassociated with CO2 injection. Real time monitoring data of these phase changes in the injectionstream under fully integrated operational conditions provides unparalleled information forunderstanding geological storage under these conditions and optimizing completion systemsBiography:Rick Chalaturnyk is a Professor of Geotechnical Engineering at the University of Alberta andholds an NSERC/Energi Simulation Industrial Research Chair in Reservoir Geomechanics. HisReservoir Geomechanics Research Group focusses primarily on subsurface processes relatedto energy processes. He has established four unique GeoInnovation Environments, whichincludes 3D printing of rocks, high temperature/pressure reservoir geomechanical testingcapability and a geotechnical beam centrifuge. Rick has over 20 years’ experience in CCUSprojects, is currently working with PTRC and SaskPower in the Aquistore Project, is pursuingthe integration of CO2 storage and geothermal opportunities and is involved with several otherinternational CCS initiatives.
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