Addressing caprock failure tendency in deep saline aquifers through ...
Addressing caprock failure tendency in deep saline aquifers through ...
Addressing caprock failure tendency in deep saline aquifers through ...
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Cap Rock <strong>failure</strong> mechanism<br />
Failure mechanism n°1<br />
Tensile Fractur<strong>in</strong>g<br />
'<br />
σ 3 ≤<br />
0<br />
Assumption :<br />
tensile strength Rt = 0<br />
See for <strong>in</strong>stance: Rutqvist et al., 2007<br />
Failure mechanism n°2<br />
Shear slip<br />
σ σ 3<br />
' '<br />
1 /<br />
vendredi 12 ju<strong>in</strong> 2009 > 52<br />
≥<br />
q<br />
Assumption :<br />
Pre exist<strong>in</strong>g fracture with no cohesion<br />
q ≈ 2 for a angle of <strong>in</strong>ternal friction ϕ’ of 20°