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'''Migration''' of [[hydrocarbon]]s is a little-understood but critical process of the [[petroleum system]]. This chapter attempts to address the following questions:

'''Migration''' of [[hydrocarbon]]s is a little-understood but critical process of the [[petroleum system]]. The short definition is: Movement of petroleum from source rock toward a reservoir or seep. Primary migration is expulsion of petroleum from fine-grained source rock, while secondary migration moves petroleum through a coarse-grained carrier bed or fault to a reservoir or seep. Tertiary migration occurs when petroleum moves from one trap to another or to a seep.<ref name=Petersetal_2012>Peters, Kenneth E., David J. Curry, and Marek Kacewicz, 2012, [http://archives.datapages.com/data/specpubs/hedberg4/INTRODUCTION/INTRODUCTION.HTM An overview of basin and petroleum system modeling: Definitions and concepts], ''in'' Peters, Kenneth E., David J. Curry, and Marek Kacewicz, eds., Basin modeling: New horizons in research and applications: [http://store.aapg.org/detail.aspx?id=1106 AAPG Hedberg Series no. 4], p. 1-16.</ref>

 

The following questions are vital for understanding the complications of the process:

* How does oil escape from the [[source rock]]?

* How does oil escape from the [[source rock]]?

* [[Migration by solution in water]]

* [[Migration by solution in water]]

* [[Migration by separate phase]]

* [[Migration by separate phase]]

[[Category:Critical elements of the petroleum system]][[Category:Migration of petroleum]]

[[Category:Critical elements of the petroleum system]][[Category:Migration of petroleum]]