Experimental and numerical simulation of supercritical CO2 microbubble injection into a brine-saturated porous medium

Hydrodynamic Analysis of CO2 Migration in Heterogeneous Rocks: Conventional and Micro‐Bubble CO2 Flooding Experiments and Pore‐Scale Numerical Simulations

“…During CO 2 injection, the time sequential CT number was obtained. CO 2 saturation on the voxel scale was calculated based on the obtained CT number for each voxel (Akin & Kovscek, 2003;Patmonoaji et al, 2019;Perrin & Benson, 2010;Perrin et al, 2009;Pini et al, 2012):…”

“…During CO 2 injection, the time sequential CT number was obtained. CO 2 saturation on the voxel scale was calculated based on the obtained CT number for each voxel (Akin & Kovscek, 2003; Patmonoaji et al., 2019; Perrin & Benson, 2010; Perrin et al., 2009; Pini et al., 2012): $$${S}_{{\text{CO}}_{2}}=\frac{{\text{CT}}_{\text{obs}}-{\text{CT}}_{\text{brine}}^{\text{sat}}}{{\text{CT}}_{{\text{CO}}_{2}}^{\text{sat}}-{\text{CT}}_{\text{brine}}^{\text{sat}}},$$$ where $${\text{CT}}_{{\text{CO}}_{2}}^{\text{sat}}$$, $${\text{CT}}_{\text{brine}}^{\text{sat}}$$, and $${\text{CT}}_{\text{obs}}$$ denote the voxel CT number for the CO 2 ‐saturated, brine‐saturated, and CO 2 ‐unsaturated cores, respectively. Once S CO2 no longer changed with CO 2 injection, CO 2 injection ceased.…”

Dissolution Mass Transfer of Trapped Phase in Porous Media

“…In general, flow bypassing can be divided into two categories. First is bypassing due to heterogeneity of porous media [32,33], and second is bypassing induced by dissolution fingering in homogeneous porous media [34][35][36]. Both of them direct water flow to preferential flow path, resulting in non-uniform dissolution mass transfer.…”

Effects of Dissolution Fingering on Mass Transfer Rate in Three‐Dimensional Porous Media

“…Then, another fluid, usual water, passes by, inducing dissolution mass transfer from the trapped phase to the flowing phase. The rate of dissolution mass transfer is important in assessing the area and period of groundwater contamination (Geller & Hunt, 1993; Imhoff et al., 1994; Johns & Gladden, 1999; Miller et al., 1990; Powers et al., 1992, 1994; Zhang et al., 2002), the effectiveness of nutrient transport in groundwater remediation (Donaldson et al., 1997; Fry et al., 1997; Geistlinger et al., 2002, 2005), and dissolution trapping in geological carbon sequestration (Chang et al., 2014, 2016; Patmonoaji et al., 2019; Patmonoaji & Suekane, 2017).…”