Definition - What does Fracture Pressure mean?
Fracture pressure or formation fracture pressure is the pressure level, above which drilling fluids are capable of inducing rock formation fractures hydraulically. This pressure is considered in hydraulic fracturing which is a stimulating process that is done on routine basis on oil wells. A fracture pressure not only deforms a rock, but it is powerful enough to etch the formations which results into fissures that are favorable for oil and gas to pass through. This pressure can be measured in gradient (psi/ft) or by fluid density equivalent, i.e., ppg.
Petropedia explains Fracture Pressure
Fracture pressure is defined as the amount of pressure that is required to disintegrate a rock formation. This pressure is measured in gradient, i.e., psi/ft and it's helpful in determining whether or not the pressure would be enough to cause a fracture. When an oil well is deep, the fracture pressure gets increased due to the overburden pressure. Since deeply situated rock formations can be tough to fracture, the fracture pressure needs to be set really high to avoid the circulation problem or resistance from the rock. The pressure can vary at different depths and geological variations.