The Permeability Alternation of Shale Fractures due to Sc-CO2 Soaking: Implications for Sc-CO2 Fracturing and Deep CO2 Sequestration in Shale Reservoirs

<div>The logarithmic closure law describes the fracture closure. (a) The relationship between fracture normal closure and effective normal stress; (b) a linear relationship is observed for fracture normal closure and logarithmic normal stress; (c) the linear relationship between effective normal stress and fracture normal stiffness; (d) a decrease of stiffness characteristic value with soaking time.</div>

Advances in Materials Science and Engineering

fig3

Figure 3

Figure 3: The Permeability Alternation of Shale Fractures due to Sc-CO2 Soaking: Implications for Sc-CO2 Fracturing and Deep CO2 Sequestration in Shale Reservoirs

Figure 3 | The Permeability Alternation of Shale Fractures due to Sc-CO2 Soaking: Implications for Sc-CO2 Fracturing and Deep CO2 Sequestration in Shale Reservoirs 