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| isbn = 0-89181-602-X
| isbn = 0-89181-602-X
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When a [[fluid pressure]] is higher than estimated from the [[normal hydrostatic fluid gradient]] for a given depth, it is called overpressure. For this situation to occur, the fluid must first be trapped within a rock unit (pressure compartment).
When a [[fluid pressure]] is higher than estimated from the [[Normal hydrostatic pressure gradients|normal hydrostatic fluid gradient]] for a given depth, it is called overpressure. For this situation to occur, the fluid must first be trapped within a rock unit (pressure compartment).
Overpressure can be caused by [[uplift]], increased [[heat]], [[compaction]], [[Hydrocarbon generation|generation of hydrocarbons]], or a combination of these factors.
Overpressure can be caused by [[uplift]], increased [[heat]], [[compaction]], [[Hydrocarbon generation|generation of hydrocarbons]], or a combination of these factors.