Use of tracers to characterize the effects of a CO2-saturated brine on the petrophysical properties of a low permeability carbonate caprock

Experimental Perspectives of Mineral Dissolution and Precipitation due to Carbon Dioxide-Water-Rock Interactions

“…Canal et al (2013) measured changes in porosity due to calcite dissolution and found a marked increase in permeability and changes to seismic velocities. Bachaud et al (2011) measured increased porosity in limestone caprock; in contrast, permeability remained low in these experiments. Hangx et al (2010) carried out creep tests on sandstones partially cemented by calcite and found that reaction of the calcite did not affect rock strength.…”

Molecular interactions of SO2 with carbonate minerals under co-sequestration conditions: A combined experimental and theoretical study

“…Carbonate formations are also of considerable importance in geologic storage of CO 2 in their capacity as caprock and injection reservoirs (Bacon et al, 2009;Wollenweber et al, 2010;Bachaud et al, 2011). With the growing interest in CO 2 sequestration and reactivity in the ensuing supercritical CO 2 environments (Lin et al, 2008;Bakri and Zaoui, 2011), there is a need to understand how these transformation reactions occur with carbonate rocks exposed to scCO 2 -dominated fluids.…”

Numerical computations of rock dissolution and geomechanical effects for CO2 geological storage

“…Decrease of both, stiffness and shear strength, and increase of permeability have been also noticed. The experiments of permeability of cap rocks have been carried out by Bachaud et al , . Diffusion and permeability coefficients have been measured under reservoir thermodynamic conditions and compared before and after the alternation.…”