Formation breakdown pressure near wellbores

A system comprising:

• one or more processors configured to perform operations comprising:
• receiving input parameters for computing a breakdown pressure for a wellbore in a formation, the input parameters comprising an inclination angle of the wellbore from a vertical axis, and an azimuth angle of the wellbore relative to a maximum horizontal stress direction, at a particular depth;
• determining, during hydraulic fracturing operations, a pore pressure for the wellbore based on a time duration, an injection fluid compressibility, and a poroelastic parameter;
• determining a poroelastic stress for the wellbore using a poroelastic stress equation and based on the pore pressure determined for the wellbore, an empirical parameter, a pore pressure, the poroelastic parameter, a tensile strength of rock, and a Poisson ratio;
• determining, during the hydraulic fracturing operations, a breakdown pressure upper bound for the wellbore based on a minimum horizontal stress and a maximum horizontal stress for the wellbore, an overburden vertical stress for the wellbore, the inclination angle of the wellbore, the azimuth angle of the wellbore, and a wellbore circumferential angle;
• applying, during the hydraulic fracturing operations, a stress correction on the breakdown pressure upper bound for the wellbore based on whether the wellbore is an open hole wellbore or a cemented liner wellbore, to generate a stress-corrected upper bound breakdown pressure for the wellbore;
• determining, during the hydraulic fracturing operations, the breakdown pressure for the wellbore based on the stress-corrected upper bound breakdown pressure for the wellbore, the poroelastic stress for the wellbore, and the pore pressure for the wellbore;
• determining, based at least on the breakdown pressure, a horsepower level for creating a fracture geometry used in the hydraulic fracturing operations;
• determining a successful placement of stimulation materials for the hydraulic fracturing operations;
• determining, based at least on the breakdown pressure, a pressure rating of tubulars required for fracturing treatment;
• and
• completing the hydraulic fracturing operations using the horsepower level, the successful placement of the stimulation materials, and one or more tubulars having the pressure rating of the tubulars required for the fracturing treatment.

A non-transitory computer storage medium encoded with instructions that, when executed by one or more computers, cause the one or more computers to perform operations comprising:

• receiving input parameters for computing a breakdown pressure for a wellbore in a formation, the input parameters comprising an inclination angle of the wellbore from a vertical axis, and an azimuth angle of the wellbore relative to a maximum horizontal stress direction, at a particular depth;
• determining, during hydraulic fracturing operations, a pore pressure for the wellbore based on a time duration, an injection fluid compressibility, and a poroelastic parameter;
• determining a poroelastic stress for the wellbore using a poroelastic stress equation and based on the pore pressure determined for the wellbore, an empirical parameter, a pore pressure, the poroelastic parameter, a tensile strength of rock, and a Poisson ratio;
• determining, during the hydraulic fracturing operations, a breakdown pressure upper bound for the wellbore based on a minimum horizontal stress and a maximum horizontal stress for the wellbore, an overburden vertical stress for the wellbore, the inclination angle of the wellbore, the azimuth angle of the wellbore, and a wellbore circumferential angle;
• applying, during the hydraulic fracturing operations, a stress correction on the breakdown pressure upper bound for the wellbore based on whether the wellbore is an open hole wellbore or a cemented liner wellbore, to generate a stress-corrected upper bound breakdown pressure for the wellbore;
• determining, during the hydraulic fracturing operations, the breakdown pressure for the wellbore based on the stress-corrected upper bound breakdown pressure for the wellbore, the poroelastic stress for the wellbore, and the pore pressure for the wellbore;
• determining, based at least on the breakdown pressure, a horsepower level for creating a fracture geometry used in the hydraulic fracturing operations;
• determining a successful placement of stimulation materials for the hydraulic fracturing operations;
• determining, based at least on the breakdown pressure, a pressure rating of tubulars required for fracturing treatment;
• and
• completing the hydraulic fracturing operations using the horsepower level, the successful placement of the stimulation materials, and one or more tubulars having the pressure rating of the tubulars required for the fracturing treatment.