Effects of grain size and small-scale bedform architecture on CO₂ saturation from buoyancy-driven flow.

ABSTRACT: Small-scale (mm-dm scale) heterogeneity has been shown to significantly impact CO₂ migration and trapping. To investigate how and why different aspects of small-scale heterogeneity affect the amount of capillary trapping during buoyancy-driven upward migration of CO₂, we conducted modified invasion percolation simulations on heterogeneous domains. Realistic simulation domains are constructed by varying two important aspects of small-scale geologic heterogeneity: sedimentary bedform architecture and grain size contrast between the matrix and the laminae facies. Buoyancy-driven flow simulation runs cover 59 bedform architecture and 40 grain size contrast cases. Simulation results show that the domain effective CO₂ saturation is strongly affected by both grain

SUBMITTER: Ni H 

PROVIDER: S-EPMC9922323 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature