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Effective fault seal model calibration is dependent on the quality of the available data. Buoyancy pressure profiles provide a method to assess the potential uncertainty involved in deriving key input data, such as Vclay (volumetric clay fraction), and in the empirical equations used to derive seal-failure criteria. For a membrane-sealing fault, seal failure occurs when the buoyancy pressure exerted by the hydrocarbon column is equal to the minimum capillary entry pressure of the fault zone. If the seal is intact, the predicted fault zone capillary entry pressure value must be higher than the buoyancy pressure and, on a...

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