Minimum normal stress in tangential direction at wellbore wall (hoop stress)
Input(s)
\(S_{\text {hmax }}\): Maximum Principal Stress in Reservoir (psi)
\(S_{\text {hmin }}\): Minimum Principal Stress in Reservoir (psi)
Po: Pore Pressure (psi)
\(S_{d t}\): Stress induced due to Temperature (psi)
\(\mathrm{dP:} \quad\) Difference Between Wellbore Pressure and Mud Weight (psi)
Output(s)
sig \(_{t h}\): Minimum Hoop Stress in Tangential Direction at Wellbore Wall (psi)
Formula(s)
\[
\operatorname{sig}_{\mathrm{th}}=3 * \mathrm{~S}_{\mathrm{hmin}}-\mathrm{S}_{\mathrm{hmax}}-2 * \mathrm{Po}-\mathrm{dP}-\mathrm{S}_{\mathrm{dt}}
\]
Reference(s)
Mark D. Zoback, Reservoir Geomechanics, Cambridge University Press, UK, Page: 238.