Rick Chalaturnyk

University of Alberta

How does the early 0.5 MT performance at the Aquistore project inform the calculation of a CO2 storage efficiency factor?

The Aquistore CO2 storage project is an integral component of SaskPower’s Boundary Dam CO2 capture project and includes one injection well and one observation well where historical dynamic data has been recorded since the drilling and completion of the CO2 injection and observation well in 2012 and the start of CO2 injection on April 16, 2015, with current injection volumes exceeding 0.5MT. Estimating CO2 storage capacity is complex due to various trapping mechanisms that operate throughout a CO2 geological storage project. We have returned to the early 0.5MT performance history of the Aquistore project to examine whether this history matched data can help inform what an appropriate efficiency factor would be for the Deadwood Formation by utilizing known parameters including amount of injected mass & monitored shape/volume occupied by CO2 in reservoir zones for early performance evaluation providing insights on the magnitude of the efficiency factor for this setting.