TY - JOUR
T1 - Dispersion of supercritical CO2 and CH4 in consolidated porous media for enhanced gas recovery simulations
AU - Honari, Abdolvahab
AU - Hughes, Thomas J.
AU - Fridjonsson, Einar O.
AU - Johns, Michael L.
AU - May, Eric F.
PY - 2013/11/1
Y1 - 2013/11/1
N2 - Enhanced gas recovery (EGR) is a promising technology offering both CO2 sequestration and enhanced recovery of natural gas when CO2 is re-injected into producing natural gas reservoirs. Mixing of CO2 and CH4 is, however, potentially problematic and could lead to asset contamination. Essential for effective assessment of EGR are reservoir simulations that require accurate descriptions of dispersive mixing of the two supercritical fluids. Here we systematically measure this supercritical dispersion data in sandstone rock cores, accounting for erroneous gravitational and entry/exit contributions. Using the measured value of dispersivity (α) as the characteristic length scale for mixing, we are able to reconcile our dispersion data with literature values for unconsolidated media (packed beds). Furthermore, our measurements of supercritical dispersion in consolidated porous media have almost 50 times less scatter than the data available in the literature for packed beds. The consequential dispersion correlation as a function of medium Péclet number captures variations with temperature, pressure and dispersing species.
AB - Enhanced gas recovery (EGR) is a promising technology offering both CO2 sequestration and enhanced recovery of natural gas when CO2 is re-injected into producing natural gas reservoirs. Mixing of CO2 and CH4 is, however, potentially problematic and could lead to asset contamination. Essential for effective assessment of EGR are reservoir simulations that require accurate descriptions of dispersive mixing of the two supercritical fluids. Here we systematically measure this supercritical dispersion data in sandstone rock cores, accounting for erroneous gravitational and entry/exit contributions. Using the measured value of dispersivity (α) as the characteristic length scale for mixing, we are able to reconcile our dispersion data with literature values for unconsolidated media (packed beds). Furthermore, our measurements of supercritical dispersion in consolidated porous media have almost 50 times less scatter than the data available in the literature for packed beds. The consequential dispersion correlation as a function of medium Péclet number captures variations with temperature, pressure and dispersing species.
KW - CO
KW - Dispersion
KW - Enhanced gas recovery
KW - Sequestration
KW - Supercritical fluids
UR - http://www.scopus.com/inward/record.url?scp=84885765655&partnerID=8YFLogxK
U2 - 10.1016/j.ijggc.2013.08.016
DO - 10.1016/j.ijggc.2013.08.016
M3 - Article
AN - SCOPUS:84885765655
VL - 19
SP - 234
EP - 242
JO - International Journal of Greenhouse Gas Control
JF - International Journal of Greenhouse Gas Control
SN - 1750-5836
ER -