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Line 17: + + + − The following figure illustrates the fill history of a trap with some finite seal capacity that has been filled to seal capacity and then leaked. The final hydrocarbon column is half of that predicted by the displacement pressure of the top seal.+ − − [[file:evaluating-top-and-fault-seal_fig10-54.png|thumb|{{figure number|10-54}}After .<ref name=ch10r6>Boult, P., J., 1993, Membrane seal and tertiary [[migration pathway]]s in the Bodalla South oilfield, Eronmanga Basin, Australia: Marine and Petroleum Geology, vol. 10, no. 1, p. 3–13., 10., 1016/0264-8172(93)90095-A</ref> Copyright: Marine and Petroleum Geology.]]
Seal capacity of breached and hydrocarbon-wet seals (view source)
Revision as of 22:17, 19 February 2014
, 22:17, 19 February 2014→Most traps half full
==Most traps half full==
==Most traps half full==
[[file:evaluating-top-and-fault-seal_fig10-54.png|thumb|{{figure number|1}}After .<ref name=ch10r6>Boult, P., J., 1993, Membrane seal and tertiary [[migration pathway]]s in the Bodalla South oilfield, Eronmanga Basin, Australia: Marine and Petroleum Geology, vol. 10, no. 1, p. 3–13., 10., 1016/0264-8172(93)90095-A</ref> Copyright: Marine and Petroleum Geology.]]
The preceding discussion suggests that in basins where there is charge sufficient to fill all traps to maximum seal capacity, traps limited by the capillary properties of intact top seals should be half full.<ref name=ch10r92>Watts, N., L., 1987, Theoretical aspects of cap-rock and fault seals for single and two-phase hydrocarbon columns: Marine and Petroleum Geology, vol. 4, no. 4, p. 274–307., 10., 1016/0264-8172(87)90008-0</ref> Rather than the hydrocarbon columns matching the displacement pressures of the seal, all filled traps would have leaked hydrocarbons until the buoyant pressure (P<sub>b</sub>) is half the displacement pressure (P<sub>d</sub>). Continued charging of traps after initial fill could result in larger hydrocarbon columns. Only in basins with insufficient hydrocarbons to fill all traps to the maximum seal capacity, or with charge after leakage, would there be a large number of traps greater than half full.
The preceding discussion suggests that in basins where there is charge sufficient to fill all traps to maximum seal capacity, traps limited by the capillary properties of intact top seals should be half full.<ref name=ch10r92>Watts, N., L., 1987, Theoretical aspects of cap-rock and fault seals for single and two-phase hydrocarbon columns: Marine and Petroleum Geology, vol. 4, no. 4, p. 274–307., 10., 1016/0264-8172(87)90008-0</ref> Rather than the hydrocarbon columns matching the displacement pressures of the seal, all filled traps would have leaked hydrocarbons until the buoyant pressure (P<sub>b</sub>) is half the displacement pressure (P<sub>d</sub>). Continued charging of traps after initial fill could result in larger hydrocarbon columns. Only in basins with insufficient hydrocarbons to fill all traps to the maximum seal capacity, or with charge after leakage, would there be a large number of traps greater than half full.
[[:file:evaluating-top-and-fault-seal_fig10-54.png|Figure 1]] illustrates the fill history of a trap with some finite seal capacity that has been filled to seal capacity and then leaked. The final hydrocarbon column is half of that predicted by the displacement pressure of the top seal.
==Water wet vs. oil wet==
==Water wet vs. oil wet==