Supplement to: Johnson, Gareth; Mayer, Bernhard; Shevalier, Maurice; Nightingale, Michael; Hutcheon, Ian (2011): Tracing the movement of CO2 injected into a mature oilfield using carbon isotope abundance ratios: The example of the Pembina Cardium CO2 Monitoring project. International Journal of Greenhouse Gas Control, 5(4), 933-941, https://doi.org/10.1016/j.ijggc.2011.02.003