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Line 21: + + + − − [[file:evaluating-top-and-fault-seal_fig10-6.png|thumb|{{figure number|1}}A fault is cross sealing if it juxtaposes hydrocarbon-bearing sands with water-wet sands.]]
→Hydrocarbon against water
==Hydrocarbon against water==
==Hydrocarbon against water==
[[file:evaluating-top-and-fault-seal_fig10-6.png|thumb|left|{{figure number|1}}A fault is cross sealing if it juxtaposes hydrocarbon-bearing sands with water-wet sands.]]
A fault is cross sealing if it juxtaposes hydrocarbon-bearing sands with water-wet sands, as illustrated in [[:file:evaluating-top-and-fault-seal_fig10-6.png|Figure 1]]. Both oil and gas are prevented from flowing into the sand in the hanging wall (R<sub>d</sub>) by the cross-sealing fault.
A fault is cross sealing if it juxtaposes hydrocarbon-bearing sands with water-wet sands, as illustrated in [[:file:evaluating-top-and-fault-seal_fig10-6.png|Figure 1]]. Both oil and gas are prevented from flowing into the sand in the hanging wall (R<sub>d</sub>) by the cross-sealing fault.
==Different hydrocarbon contacts==
==Different hydrocarbon contacts==