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Primary migration and compositional changes (view source)
Revision as of 20:30, 15 December 2014
, 20:30, 15 December 2014→Compositional changes and correlation
==Compositional changes and correlation==
==Compositional changes and correlation==
Expulsion favors [[light compounds]] over [[heavy compounds]] and [[saturated hydrocarbons]] over [[aromatics]]. This is due to [[molecular filtering]] and [[adsorption]]–[[desorption]] phenomena, particularly during the early stages. However, because significant quantities of hydrocarbons are retained in the large and medium [[Pore system fundamentals|pore systems]] within the source rock, the correlation of reservoired oil with its respective source rock is not significantly affected (see also [[Oil-oil and oil-source rock correlation]]. The effect of continued [[maturation]] of the source rock after expulsion is a more significant impediment to correlation.
Expulsion favors [[light compounds]] over [[heavy compounds]] and [[saturated hydrocarbons]] over [[Wikipedia:Aromatic hydrocarbon|aromatics]]. This is due to [[molecular filtering]] and [[adsorption]]–[[desorption]] phenomena, particularly during the early stages. However, because significant quantities of hydrocarbons are retained in the large and medium [[Pore system fundamentals|pore systems]] within the source rock, the correlation of reservoired oil with its respective source rock is not significantly affected (see also [[Oil-oil and oil-source rock correlation]]. The effect of continued [[maturation]] of the source rock after expulsion is a more significant impediment to correlation.
==See also==
==See also==