A Damage Constitutive Model for the Effects of CO₂-Brine-Rock Interactions on the Brittleness of a Low-Clay Shale

Figure 13

The lateral strain distribution of soaked shale samples. (a), (c), and (e) are in subcritical CO₂ + NaCl solution; (b), (d), and (f) are in supercritical CO₂ + NaCl solution.

(a) 10 days in subcritical CO₂ + NaCl solution

(b) 10 days in supercritical CO₂ + NaCl solution

(c) 20 days in subcritical CO₂ + NaCl solution

(d) 20 days in supercritical CO₂ + NaCl solution

(e) 30 days in subcritical CO₂ + NaCl solution

(f) 30 days in supercritical CO₂ + NaCl solution