Geologic carbon storage (GCS) requires consideration of storage capacity, injectivity and migration of gigatons of supercritical fluids in sedimentary basins. However, the size of basin-scale GCS models requires simplification that limits retention of geologic heterogeneity. Homogeneous GCS models (uniform and average properties in large cells) facilitate initial basin storage evaluation useful in screening, but cannot account for the actual reservoir architecture affecting both reaction and flow rates in heterogeneous media. The generation and integration of geological and petrophysical models (multi-field, regional aquifers) presented here highlight the uncertainty and risk created by using simplified GCS models to direct research and make policy decisions. This paper emphasizes a workflow that utilizes the natural hierarchy within sedimentary architecture to geologically upscale a family of static geomodels that retain multiple scales and types of heterogeneity. More importantly, geologic controls on heterogeneity can be explicitly manipulated to manage heterogeneity distributions known to change through the life of petroleum reservoirs. There is no reason GCS will not follow a similar path.

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