Secondary Migration and Accumulation

Abstract

Secondary migration is defined as the movement of petroleum compounds through more permeable and porous carrier beds and reservoir rocks, as opposed to primary migration through dense, less permeable and porous source rocks. Secondary migration terminates in hydrocarbon pools, but tectonic events such as folding, faulting or uplifting may cause redistribution of filled oil or gas pools and thus initiate an additional phase of secondary migration. When this results in a new accumulation it is sometimes called remigration or tertiary migration.