Abstract
The potential contamination of underground drinking water (UDW) caused by CO2 leakage is a critical decision input for risk assessment and management decision making. This paper presents an overview of the potential alterations to UDW quality caused by CO2 and the relevant quality guidelines on drinking water. Furthermore, a framework and numerical simulator have been developed to (i) predict and assess the potential consequences of CO2 leakage on the quality of UDW; and (ii) assess the efficiency of groundwater remediation methods and scenarios for various UDW leakage conditions and alterations. The simulator was applied to a Canadian CO2 disposal site to assess the potential consequences of CO2 leakage on groundwater quality. The information, framework, and numerical tool presented here are useful for successful risk assessments and the management of CO2 capture and sequestration in Canadian geological formations.
Highlights
Human activities have altered the chemical composition of the atmosphere through emissions of greenhouse gases (GHGs), primarily carbon dioxide (CO2 ), methane (CH4 ), and nitrous oxide [1,2,3].GHGs tend to warm the Earth’s surface by absorbing infrared radiation reflected by it
The primary objective of one of the projects supported by Carbon Management Canada (CMC) is, in a transdisciplinary collaboration, to develop a tailored-for-Canada framework for CO2 capture and storage (CCS) risk assessment and management, based on best practices being developed around the world, as well as on the Canadian experience to date
To present a framework and a numerical simulator that have been developed at the University of Ottawa to predict and assess the potential consequences of CO2 leakage on the quality of underground drinking water (UDW); to provide an overview of the potential alterations in UDW quality caused by CO2 and drinking-water quality guidelines
Summary
Shell Canada Limited (Shell, Calgary, AB, Canada), on behalf of the Athabasca Oil Sands Project (AOSP), has made an application to the Energy Resources Conservation Board to construct and operate aaCCS. Upgradertransport facility), transport it (via pipeline), and permanently store in theCambrian. It is expected (BCS) formation, at a depth of approximately 2 km below ground level (Figure 13). CO2 leakage deepfrom geological storage could adversely adversely the water quality in that the aquifers that overlie the BCS. To better impact theimpact water quality in the aquifers overlie the BCS. To better understand the understand theofconsequences of CO leakageofon the quality of the groundwater present in the project consequences. CO2 leakage on the2quality the groundwater present in the project area, numerical area, numerical simulations have been performed by using the THMC simulator developed in this simulations have been performed by using the THMC simulator developed in this study. Quest project project area of interest (source: [50])
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