One of the popular mathematical models is given by:
{\rm FBP} = p_b = 3 \, \sigma_{h, \rm min} - \sigma_{h, \rm max} + \sigma_t - p_i |
where
| minimal principal horizontal stress | |
| maximal principal horizontal stress | |
| tensile stress | |
| initial formation pressure |
Petroleum Industry / Upstream / Well / Well-Reservoir Contact (WRC) / Hydraulic fracture / Formation Breakdown Pressure (FBP)