Speaker
Description
Geologic gas storage opens exciting horizons for at-scale decarbonization (e.g., CO2 storage, seasonal H2 storage, etc.), but is encumbered by potential for leakage due to fluid-solid reactions (e.g., embrittlement, permeability heterogeneity). The distribution and control of naturally-occurring bacteria that enable mineralization in these formations, a process known as microbially-induced carbonate precipitation (MICP), provides an opportunity to heal storage formations in situ. Practical implementation of MICP in the field, however, is challenged by poor control over the spatial extent of carbonate precipitation, where carbonates are precipitated primarily within ~ cm of the injection site. In this talk, we investigate the reactive transport controls on MICP necessary to enable deep MICP penetration into the formation using porous micromodels. Specifically, we show that cation-assisted microbe adsorption on pore surfaces enables uniform microbial distribution across the porous medium rather than local accumulation near the inlet, and extends the spatial reach of MICP throughout the pore space.
| Country | United States |
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