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Hydrofractured seal leakage (view source)
Revision as of 17:16, 17 November 2014
, 17:16, 17 November 2014→Characteristics
==Characteristics==
==Characteristics==
Unlike other [[Fractured membrane seal leakage|fractured seals]], hydrofractures remain open only as long as pore pressure exceeds fracture pressure. Once the total pressure drops, the fracture closes. The [[Hydrocarbon column|petroleum column]] height remains approximately in equilibrium with the difference between the water pressure and the fracture pressure.
Unlike other [[Fractured membrane seal leakage|fractured seals]], hydrofractures remain open only as long as [http://www.glossary.oilfield.slb.com/en/Terms/p/pore_pressure.aspx pore pressure] exceeds fracture pressure. Once the total pressure drops, the fracture closes. The [[Hydrocarbon column|petroleum column]] height remains approximately in equilibrium with the difference between the water pressure and the fracture pressure.
Hydraulic fracture seal failure affects all rock types, but the fracture gradient is a function of rock type and basin. Usually hydraulic fracturing limits the petroleum column height during [[Calculating charge volume|charging]] instead of destroying [[accumulation]]s after charging. This occurs where accumulations are charged during times of peak [http://www.glossary.oilfield.slb.com/en/Terms/g/geopressure.aspx geopressure] so the trap capacity is minimal. Charging occurs during times of peak geopressure because both charging and geopressure are a response to high sedimentation and heating rates.
Hydraulic fracture seal failure affects all rock types, but the fracture gradient is a function of rock type and basin. Usually hydraulic fracturing limits the petroleum column height during [[Calculating charge volume|charging]] instead of destroying [[accumulation]]s after charging. This occurs where accumulations are charged during times of peak [http://www.glossary.oilfield.slb.com/en/Terms/g/geopressure.aspx geopressure] so the trap capacity is minimal. Charging occurs during times of peak geopressure because both charging and geopressure are a response to high sedimentation and heating rates.