10,351
edits
Changes
Jump to navigation
Jump to search
Line 36:
Line 36: − +
Pressure compartment seals (view source)
Revision as of 21:08, 18 February 2014
, 21:08, 18 February 2014→Episodic leakage of hydrocarbons
Regional pressure compartment pressures build as a result of hydrocarbon generation and other mechanisms. Intermittent release of hydrocarbons and other fluids occurs when hydrostatic pressure exceeds the fracture gradient of the top seal. Hydrocarbons released from regional pressure compartments charge formations overlying the top seal of the compartment. Subsequent bleed-down of pressure allows temporary rehealing of the fractures. This cycle undoubtedly repeats many times. (David Powley, personal communication).
Regional pressure compartment pressures build as a result of hydrocarbon generation and other mechanisms. Intermittent release of hydrocarbons and other fluids occurs when hydrostatic pressure exceeds the fracture gradient of the top seal. Hydrocarbons released from regional pressure compartments charge formations overlying the top seal of the compartment. Subsequent bleed-down of pressure allows temporary rehealing of the fractures. This cycle undoubtedly repeats many times. (David Powley, personal communication).
The pressure-depth plot in [[:file:formation-fluid-pressure-and-its-application_fig5-28.png|Figure 3]] is from Ernie Dome, Central Transylvania basin, Romania. It shows how pressure and fluids are released from a compartment when pressure in the compartment reaches the top-seal fracture pressure.
The pressure-depth plot in [[:file:formation-fluid-pressure-and-its-application_fig5-28.png|Figure 1]] is from Ernie Dome, Central Transylvania basin, Romania. It shows how pressure and fluids are released from a compartment when pressure in the compartment reaches the top-seal fracture pressure.
==Example of episodic leakage==
==Example of episodic leakage==