Typically, pressure ranges from about 2,000 psi (pounds per square inch) to over 10,000 psi. In some cases, particularly in deeper or more compact formations, pressures can exceed 15,000 psi. These high pressures are necessary to overcome the rock’s natural resistance and create the fractures needed to release hydrocarbons.
- Shallow Formations: In shallower formations, pressures tend to be on the lower end of the spectrum, around 2,000 to 5,000 psi. These formations are generally less compact, requiring less force to fracture.
- Deeper Formations: For deeper formations, where the rock is more compact and resistant, pressures can range from 5,000 to 10,000 psi or more. The greater depth and density of the rock necessitate higher pressures to achieve the desired fractures.
- Extreme Cases: In the most challenging scenarios, fracking pressures can exceed 15,000 psi. These extreme pressures are typically used in formations with exceptionally hard rock or significant depth.