Precipitation of Dissolved CO2 in Laboratory Porous Media Following Rapid Depressurization

Affiliation(s) PI Project period Funded by
DHS Cooper, Clay 07/01/2011 - 06/30/2012 Desert Research Institute - DHS

Project Description

The objective of this project is to develop and carry out experiments that establish the conditions in which dissolved CO2 in water precipitates, forms bubbles, and moves through a laboratory chamber filled with glass beads (Figure 1c and d). A fundamental question that is important to successful geologic containment of CO2 is the following: Given that CO2-brine plumes will form and sink throughout an aquifer/reservoir, does the water have to be saturated with CO2 in order for it to come out of solution following a shock? I hypothesize that the conditions in which CO2 comes out of solution are dependent upon the magnitude of the shock and the partial pressure of the CO2; bubble ascent through porous media is a function of the permeability and density of bubbles, which is in turn a function of the initial dissolved CO2 concentration.