Abstract
The elastic frame moduli for the Lower Mt. Simon Sandstone are estimated by accounting for grain boundary compliance and concavity of pores in the vicinity of grain contacts. This sandstone is the target formation for underground storage of CO2 in the Illinois Basin – Decatur Project, a 1-million-ton carbon capture and storage project in Decatur, Illinois. Knowledge of the elastic frame moduli allows the feasibility of time-lapse seismic for monitoring the injection and storage of CO2 injection to be assessed.
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