HR: 1340h
AN: U43C-1377    [Abstracts]
TI: Experimental and Numerical Study of CO2 Sequestration in Geologic Formations.
AU: * Riaz, A
EM: ariaz@stanford.edu
AF: Stanford University, Department of Energy Resources Engineering, Stanford, CA 94305, United States
AU: Cinar, Y
EM: y.cinar@unsw.edu.au
AF: University of New South Wales, School of Petroleum Engineering, Sydney, NSW 2052, Australia
AU: Tchelepi, H A
EM: tchelepi@Stanford.EDU
AF: Stanford University, Department of Energy Resources Engineering, Stanford, CA 94305, United States
AB: Sequestration of carbon dioxide in geologic formations is the most effective method of reducing the impact of global warming. Experiments at the laboratory scale are presented to investigate the influence of gravitational, viscous and capillary effects on the sequestration process. Experiments are performed in the parameter range of practical flows associated with CO2 sequestration and are carried out primarily to investigate the type of flow regimes expected. We demonstrate the existence of pore scale instability in the presence of unfavorable gradients of viscosity and density, which cannot be modeled by conventional means such as continuum Darcy equations. A comparison with theoretical estimates from gradient percolation theory shows good agreement with experimental observations. Numerical simulations based on pore network models are carried out to determine the correct conductivity relation as a function of various parameters.
DE: 1225 Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556)
DE: 1805 Computational hydrology
DE: 3215 Instability analysis
DE: 4255 Numerical modeling (0545, 0560)
SC: Union [U]
MN: 2007 Fall Meeting