Minimum compression at vertical wellbore

Input(s)

$S_{\text {hmin }}$: Minimum Horizontal Stress (psi)

$S_{\text {hmax }}$: Maximum Horizontal Stress (psi)

$P_{o}$: Pore Pressure $(\mathrm{psi})$

P: Pressure Drawdown (psi)

$\sigma_{t}$: Thermal Stress (psi)

Output(s)

$\sigma_{\text {minaxial }}$: Minimum Axial Stress (psi)

Formula(s)

$$ \sigma_{\text {minaxial }}=3 * \mathrm{~S}_{\mathrm{h} \min }-\mathrm{S}_{\mathrm{h} \max }-2 * \mathrm{P}_{\mathrm{o}}-\mathrm{P}-\sigma_{\mathrm{t}} $$

Reference(s)

Mark D. Zoback, Reservoir Geomechanics, Cambridge University Press, UK, Page: 174.