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Abstract In situ CO 2 mineral storage is gaining increasing attention as a carbon capture and storage (CCS) technology to reduce anthropogenic CO 2 emissions. So far, in situ CO 2 mineral storage projects have been monitored predominantly using fluid‐ and isotope geochemical methods. Here, we investigate the feasibility of crosshole seismic differential traveltime tomography as an additional, geophysical monitoring tool. First, we use a rock physics modeling approach to examine how secondary mineral precipitation influences the seismic velocity of the basaltic host rock. Then, we test two forward modeling approaches—an eikonal solver and spectral element modeling—to determine the sensitivity of a time‐lapse crosshole seismic survey toward seismic velocity anomalies of various spatial extents and strengths. We determine the minimal velocity increase and corresponding volumetric calcite precipitation required to successfully perform crosshole seismic time‐lapse monitoring.
Junker et al. (Mon,) studied this question.