Repsol Oil and Gas Canada Inc (Repsol), the National Energy Technology Laboratory (NETL) and University of Alberta (UAlberta) will prove the technical feasibility and assess potential leakage risk for CO2 geologic storage in an onshore, pressure-depleted gas reservoir. The candidate reservoir, located near Edson, Alberta in Canada is operated by Repsol and is being considered for development of an onshore carbon capture and storage (CCS) Hub project called Amigo. Through the two-year ACT4 project duration, a CO2 injection program will be developed for this depleted gas reservoir utilizing state-of-art and novel technical workflows.