Modelling ERT Monitoring of CO2-Storage with Enhanced Coalbed Methane Recovery

E015 Modelling ERT Monitoring of CO2-Storage with Enhanced Coalbed Methane Recovery J. van Sijl (Utrecht University Faculty of Geosciences) P. Winthaegen* (TNO Built Environment and Geosciences) B. Goes (TNO Built Environment and Geosciences) & C.J. Peach (Utrecht University Faculty of Geosciences) SUMMARY This paper focuses on modelling borehole to borehole electrical resistivity tomography (ERT) monitoring of CO2-storage in association with enhanced coalbed methane recovery (CO2-ECBM). The best results are obtained with the so called ratio inversion i.e. inverting the ratio between two time-differenced apparent resistivity datasets. It is shown that ERT can be applied to monitor CO2-ECBM especially for near-well