Researchers in the CCS Group use experimental and numerical modelling techniques to address questions about CO2 injectivity, the mechanisms of oil mobilisation during CO2-EOR, CO2 migration and trapping from pore scale to basin scale, and the security of storage over thousands of years. These activities all contribute to a better understanding of the risk assessment, management, optimisation and cost reduction in CO2 injection operations. The group draws heavily on expertise developed in petroleum engineering disciplines such as reservoir description, fluid phase behaviour, flow in porous media, geomechanics, geochemistry and flow assurance to tackle the current subsurface technical challenges facing CCS. Postgraduate students carry out research on the fundamental understanding of CO2 behaviours in the subsurface, and also on very applied studies, some of which use field data supplied by funders and partners. The tools used include core flooding equipment, micromodel visualisation cells, pore scale network models and commercial reservoir simulation suites such as CMG and ECLIPSE.