Regional-scale advective, diffusive, and eruptive dynamics of CO2 and brine leakage through faults and wellbores

Regional‐scale advective, diffusive, and eruptive transport dynamics of CO2 and brine within a natural analogue in the northern Paradox Basin, Utah, were explored by integrating numerical simulations with soil CO2 flux measurements. Deeply sourced CO2 migrates through steeply dipping fault zones to...

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Bibliographic Details
Published in:Journal of geophysical research. Solid earth 2015-05, Vol.120 (5), p.3003-3025
Main Authors: Jung, Na-Hyun, Han, Weon Shik, Han, Kyungdoe, Park, Eungyu
Format: Article
Language:English
Subjects:
Aquifers
Brines
Carbon dioxide
Carbon dioxide flux
CO2 sequestration
Computational fluid dynamics
Computer simulation
Dipping
Discharge
Dissolution
Dissolving
Dynamics
fault leakage
Fault zones
Faults
Fluid flow
Flux
Geophysics
Groundwater
Leakage
multiphase flow
natural analogue
numerical modeling
Numerical simulations
Permeability
Phase (cyclic)
Regional analysis
Regional development
Saline water
Soil
Soil permeability
Soils
Spring
Stability
Stability analysis
Transport
Traps
Water springs
wellbore leakage
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Summary:Regional‐scale advective, diffusive, and eruptive transport dynamics of CO2 and brine within a natural analogue in the northern Paradox Basin, Utah, were explored by integrating numerical simulations with soil CO2 flux measurements. Deeply sourced CO2 migrates through steeply dipping fault zones to the shallow aquifers predominantly as an aqueous phase. Dense CO2‐rich brine mixes with regional groundwater, enhancing CO2 dissolution. Linear stability analysis reveals that CO2 could be dissolved completely within only ~500 years. Assigning lower permeability to the fault zones induces fault‐parallel movement, feeds up‐gradient aquifers with more CO2, and impedes down‐gradient fluid flow, developing anticlinal CO2 traps at shallow depths (
ISSN:2169-9313
2169-9356
DOI:10.1002/2014JB011722