Session

12.09.2017     14:10–16:10

Title:
MS34
Understanding the impact of heterogeneity on CO2 plume spreading and immobilisation
Type:
Subsurface models (cryoshpere, hydrosphere, lithosphere, pedoshpere)
Room:

Predicting CO2 plumes in saline aquifers is challenging: the displacement front is unstable due to the low viscosity of CO2. Different types of saturation patterns can evolve dependent on the flow regime in the aquifer: near-well inertia to viscous-force dominated flow is characterised by viscous and heterogeneity-induced fingering; peripheral buoyancy-capillary dominated flow might evolve into non-compact ganglia migration [2]. Flow property and compositional heterogeneity further implies small-scale spatial variations in force balances and wettability. Which instabilities are captured by current simulation approaches? To what degree are predictions of storage capacity and plume extent compromised by sub-seismic heterogeneity influencing sweep, micro-displacement efficiency, and residual trapping? 20-yrs injection at Sleipner, create a plume with a mean CO2 saturation of 5%, why? This minisymposium focuses on numeric methods and simulation approaches that address these challenges and discontinuous material property variations, including modelling of anisotropy and flow-regime dependent saturation functions in particular.

12.09.2017
14:10–16:10

Title:
MS34
Understanding the impact of heterogeneity on CO2 plume spreading and immobilisation
Type:
Subsurface models (cryoshpere, hydrosphere, lithosphere, pedoshpere)
Room:

Predicting CO2 plumes in saline aquifers is challenging: the displacement front is unstable due to the low viscosity of CO2. Different types of saturation patterns can evolve dependent on the flow regime in the aquifer: near-well inertia to viscous-force dominated flow is characterised by viscous and heterogeneity-induced fingering; peripheral buoyancy-capillary dominated flow might evolve into non-compact ganglia migration [2]. Flow property and compositional heterogeneity further implies small-scale spatial variations in force balances and wettability. Which instabilities are captured by current simulation approaches? To what degree are predictions of storage capacity and plume extent compromised by sub-seismic heterogeneity influencing sweep, micro-displacement efficiency, and residual trapping? 20-yrs injection at Sleipner, create a plume with a mean CO2 saturation of 5%, why? This minisymposium focuses on numeric methods and simulation approaches that address these challenges and discontinuous material property variations, including modelling of anisotropy and flow-regime dependent saturation functions in particular.


14:10–14:30
O174 The impact of sedimentary facies on plume spreading in fluvial sandstone aquifers as investigated by simulations with a hybrid FEM-FVM embedded discontinuity method
Stephan K. Matthai (Parkville/AU)


14:30–14:50
O175 Hysteresis in relative permeabilities suffices for propagation of saturation overhoot
Rudolf Hilfer (Stuttgart/DE)


14:50–15:10
O176 Reservoir-scale modeling of CO2 injection with impurities and convective dissolution
Irina Sin (Melbourne/AU)


15:10–15:30
O178 Vertically integrated approaches for carbon storage modeling in heterogeneous domains
Karl Bandilla (Princeton/US)