The project made accurate predictions for the trapping of injected mixed supercritical (sc)CO2, in the deep saline aquifer of the Rock Springs Uplift (RSU) in Southwest Wyoming. Such predictions were based on new, state-of-the-art experimental measurements of relevant flow functions that were used in a recently developed, high-performance, high-resolution simulation tool. Results of state-of-the-art laboratory experiments using core samples from the RSU were used in a physically-based dynamic core-scale pore network model that led to improved understanding of mixed scCO2 trapping mechanisms, This, in turn, allowed the identification of pore-level flow conditions under which permanent capillary trapping can be maximized, which were subsequently communicated to a high performance simulation tool. This tool allowed for geomechanical deformation of the surrounding formations, equilibrium calculations for mixed scCO2, water, and salt, and was used for uncertainty quantification using geological models.
This project focused on improving the understanding of mixed supercritical CO2 storage in the Rock Springs Uplift. Better understanding of CO2 interactions with rock/brine and migration reduces uncertainty in predicting storage capacity and repository suitability. Specifically, this project determined the technical and economic feasibility of CO2 storage in the target formation by developing a regional dynamic model.
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