Carbon capture and storage (CCS) in geologic formations has been identified as one of the options for abatement of CO2 emissions to the atmosphere. This is especially true if fossil fuels—in particular, coal—continue to be used as the source of primary power. Numerous challenges remain from the point of view of science, technology, and policy. Many of these challenges are related to the scale at which CCS would have to be deployed to be an effective climate-change mitigation tool. This special session will focus on the scientific issues related to injection, migration, and permanence of carbon dioxide in deep geologic strata. We seek contributions that improve our fundamental understanding of geologic CO2 storage, and our ability to model it at different scales. Topics of interest include, among others:

• CO2 displacement, dissolution and reaction at the pore-scale
• Migration and trapping at the geologic scale
• Novel modeling approaches for CO2-brine subsurface flows
• High-resolution simulation of CO2-brine unstable flows (viscous, capillary, and gravity instabilities)
• Computational strategies for data assimilation and monitoring
• Mathematical models and numerical studies of capacity and injectivity
• Evaluation of leakage through wells and faults – coupling with geomechanics
• Efficient frameworks for risk assessment
• Modeling of enhanced geothermal systems and enhanced oil recovery with CO2 as a working fluid