Fracture Pressure Threshold

Definition - What does Fracture Pressure Threshold mean?

Fracture pressure threshold is the point at which a weakened borehole wall will begin to crack. Borehole testing can reveal the risk of fracture. The strength and stability of a borehole wall are important factors in the ongoing assessment of a trenchless construction operation.

Trenchlesspedia explains Fracture Pressure Threshold

The prediction of fracture pressure can be calculated in several ways. These include the Hubbert and Willis Equation, the Matthews and Kelley Correlation, the Pennebaker Correlation, and the Christman Correlation. The process includes analyzing data, identifying trends, and calculating fracture gradients.

While these methods are beyond the understanding of laymen, anyone can understand that the potential for the cracking or collapse of a borehole wall can be a risk in the trenchless technology business. Other tests used to determine fracture formation pressure include the leak-off test, limit test, and formation breakdown test. These tests are used to determine the weakest areas of a borehole in a trenchless operation.

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