Maximum principal stress calculation using breakout width
Input(s)
\(S_{\text {hmin }}\): Minimum Principal Stress in Reservoir (psi)
\(C_{o}\): Distance from Wellbore \((\mathrm{ft})\)
Pp: Pore Pressure (psi)
\(\mathrm{S}_{\mathrm{dt}}\): Stress induced Due to Temperature \((\mathrm{psi})\)
\(\mathrm{dP}\): Difference Between Wellbore Pressure and Mud Weight (psi)
\(\Theta\): Angle from Wellbore Breakout Width (rad)
Output(s)
\(S_{h m i n}\): Maximum Principal Stress in Reservoir (psi)
Formula(s)
\[
\mathrm{S}_{\mathrm{hmax}}=\frac{\left(\left(\mathrm{C}_{\mathrm{o}}\right)+2 * \mathrm{Pp}+\mathrm{dP}+\mathrm{Sdt}\right)-\mathrm{S}_{\mathrm{hmin}} *(1+2 * \cos (\Theta))}{1-2 * \cos (\Theta)}
\]
Reference(s)
Mark D. Zoback., Reservoir Geomechanics, Cambridge University Press, UK, Page: 223.