Science – Society – Technology
Name | “Andersonian” stress state (MPa) | Transformed stress state, aligned with a local coordinate system which is aligned with the wellbore axis (MPa) | |||||
---|---|---|---|---|---|---|---|
Tectonics | σ v | σ H | σ h | σ ss | σ dd | τ sd | |
Case A | Intermediary normal/strike-slip fault (σv = σH = σ1) | 134 | 134 | 60 | 125 | 85 | 21 |
Case B | Normal fault—“low” horizontal isotropic stress (σv = σ1) | 134 | 60 | 60 | 60 | 79 | 0 |
Case C | Strike-slip fault (σH = σ1 and σv = σ2) | 134 | 180 | 60 | 166 | 89 | 33 |
Case D | Normal fault—“high” horizontal isotropic stress (σv = σ1) | 134 | 80 | 80 | 80 | 94 | 0 |