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→How thick is necessary?
==How thick is necessary?==
==How thick is necessary?==
There is no simple relationship between [[Seal rock|seal]] thickness and the height of the [[hydrocarbon column]]. Seals can be extremely thin—less than [[length::1 m]] thick that seal individual hydrocarbon [[accumulation]]s. There are also examples of traps with thick shale seals that are [[dry]]. This difficulty in establishing a relationship between seal thickness and column is especially true since many hydrocarbon columns are controlled by [[fault]]-related [[spill point]]s that are independent of top seal thickness.
There is no simple relationship between [[seal]] thickness and the height of the [[hydrocarbon column]]. Seals can be extremely thin—less than [[length::1 m]] thick that seal individual hydrocarbon [[accumulation]]s. There are also examples of traps with thick shale seals that are [[dry]]. This difficulty in establishing a relationship between seal thickness and column is especially true since many hydrocarbon columns are controlled by [[fault]]-related [[spill point]]s that are independent of top seal thickness.
==Seal thickness studies==
==Seal thickness studies==