Changes

The migration method partly determines the extent of compositional changes that occur during secondary, tertiary, or remigraton. If the petroleum moves as a broad front—as would be expected for solution gas or light oil in water and perhaps for dispersed colloids or droplets—there would be a maximum probability of interactions. However, if the petroleum moved as a slug or filament, contact with elements that could alter its composition would be more limited.

The migration method partly determines the extent of compositional changes that occur during secondary, tertiary, or remigraton. If the petroleum moves as a broad front—as would be expected for solution gas or light oil in water and perhaps for dispersed colloids or droplets—there would be a maximum probability of interactions. However, if the petroleum moved as a slug or filament, contact with elements that could alter its composition would be more limited.

[[file:migration-of-petroleum_fig7-8.png|thumb|{{figure number|1}}After Schowalter.<ref name=ch07r12>Schowalter, T., T., 1979, Mechanics of secondary hydrocarbon migration and entrapment: AAPG Bulletin, vol. 63, p. 723–760.</ref>]]

[[file:migration-of-petroleum_fig7-8.png|thumb|{{figure number|1}}After Schowalter.<ref name=ch07r12>Schowalter, T., T., 1979, [http://archives.datapages.com/data/bulletns/1977-79/data/pg/0063/0005/0700/0723.htm Mechanics of secondary hydrocarbon migration and entrapment]: AAPG Bulletin, vol. 63, p. 723–760.</ref>]]

==Seal [[leakage]] from traps with gas caps==

==Seal [[leakage]] from traps with gas caps==