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Primary migration and compositional changes (view source)
Revision as of 15:20, 27 May 2014
, 15:20, 27 May 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 systems within the source rock, the correlation of reservoired oil with its respective source rock is not significantly affected. 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 [[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==