Primary migration: process involved in movement of generated hydrocarbons from fine grained low permeiability source rock into highly permeable carrier beds.
Secondary migration: process involved in movement of hydrocarbons within permeable formations and fractures owing to pressure differences, buoyance, or diffusion.
Entrapment: Confinement of hydrocarbons at faults,formation boundaries or pinch-outs owing to capillary pressure greater than buoyant force
"The semester I found StudyBlue, I went from a 2.8 to a 3.8, and graduated with honors!"Jennifer Colorado School of Mines