Fracture gradient (Eaton)

Input(s)

v: Poisson (dimensionless)

$S_{v}$: Vertical Stress (psi)

$P_{p}$: Pore Pressure (psi)

Output(s)

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

Formula(s)

$$ \mathrm{S}_{\mathrm{hmin}}=\left(\frac{\mathrm{v}}{1-\mathrm{v}}\right) *\left(\mathrm{~S}_{\mathrm{v}}-\mathrm{P}_{\mathrm{p}}\right)+\mathrm{P}_{\mathrm{p}} $$

Reference(s)

Mark D. Zoback, Reservoir Geomechanics, Cambridge University Press, UK, Page: 282.