Estimating the Formation Fracture Pressure Through Geomechanical Modeling

This chapter introduces a technique for predicting formation fracture pressure through geomechanical modeling. It outlines fundamental elasticity concepts and parameters, including stress, strain, and the stress–strain relationship, and their correlation with the uniaxial compressive strength of rocks. The discussion extends to pore pressure and its impact on formation fracture pressure. Additionally, it covers methods for estimating the magnitude and orientation of principal stresses in situ, utilizing tools like image logs (FMI) and elastic moduli. The chapter also details the construction of a geomechanical model, involving the determination of elastic constants, static elastic moduli, rock resistance parameters, overburden stress, horizontal in-situ stresses, Biot coefficient, in-situ stress regime, and temperature conditions. Ultimately, the chapter aims to offer a theoretical and practical framework for predicting formation fracture pressure and enhancing well design and stimulation processes.