Changes

* The [[seal]] or [[Trap leakage|leak]] threshold [[shale gouge ratio]] (SGR) must be empirically calibrated for each basin, using known [[seal]]ing and [[leak]]ing faults. An SGR threshold for the [[Gulf Coast]] cannot be used for assessing prospects in the [[Gippsland basin]]. The confidence with which a seal can be risked is thus much greater in a production setting or mature basin than it is in a frontier setting.

* The [[seal]] or [[Trap leakage|leak]] threshold [[shale gouge ratio]] (SGR) must be empirically calibrated for each basin, using known [[seal]]ing and [[leak]]ing faults. An SGR threshold for the [[Gulf Coast]] cannot be used for assessing prospects in the [[Gippsland basin]]. The confidence with which a seal can be risked is thus much greater in a production setting or mature basin than it is in a frontier setting.

* It does not apply to all structural styles, and specifically it does not necessarily apply to faults in [[foreland fold and thrust belts]] or [[strike-slip]] basins. All basins in which quantitative fault seal analysis has been proven to date are dominated by detached or [[basement]]-involved [[normal fault]]s.

* It does not apply to all structural styles, and specifically it does not necessarily apply to faults in [[foreland fold and thrust belts]] or [[strike-slip]] basins. All basins in which quantitative fault seal analysis has been proven to date are dominated by detached or [[basement]]-involved [[normal fault]]s.

* [[Cataclasis]], [[Diagenesis|diagenetic effects]], localized fracturing, sharp changes in the [[permeability]] or [[displacement pressure]] of sands, reactivation of earlier normal faults in [[compression]], “[[shale-outs]],” and the lack of lateral sand continuity in [[fluvial]] sequences can affect seal behavior.

* [[Cataclasis]], [[Diagenesis|diagenetic effects]], localized fracturing, sharp changes in the [[permeability]] or [[displacement pressure]] of sands, reactivation of earlier normal faults in [[compression]], “[[shale-outs]],” and the lack of [[lateral]] sand continuity in [[fluvial]] sequences can affect seal behavior.

* The ability to predict [[fault seal behavior]] is only as good as the ability to predict the stratigraphy and structure. As with most variables in prospect assessment, uncertainties in structure and stratigraphy lead to a minimum, maximum, and most likely fault seal risk.

* The ability to predict [[fault seal behavior]] is only as good as the ability to predict the stratigraphy and structure. As with most variables in prospect assessment, uncertainties in structure and stratigraphy lead to a minimum, maximum, and most likely fault seal risk.