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  | isbn    = 0-89181-602-X

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Linking the elements (source, reservoir, seal, and overburden) to the processes of petroleum geology (trap formation and hydrocarbon [[Petroleum generation|generation]]-migration-accumulation) is an effective exploration approach. Mapping and studying a [[petroleum system]] helps explorationists predict which traps will contain petroleum and which will not. It also helps them focus on that part of a province that will most likely contain accumulations. Below are some examples of how the petroleum system concept can be applied to petroleum exploration at local and regional levels.

Linking the elements (source, reservoir, seal, and overburden) to the processes of petroleum geology (trap formation and hydrocarbon [[Petroleum generation|generation]]-[[migration]]-[[accumulation]]) is an effective exploration approach. Mapping and studying a [[petroleum system]] helps explorationists predict which traps will contain petroleum and which will not. It also helps them focus on that part of a province that will most likely contain accumulations. Below are some examples of how the petroleum system concept can be applied to petroleum exploration at local and regional levels.

==Local example==

==Local example==

Vertically drained systems have the following characteristics<ref name=ch03r4 />

Vertically drained systems have the following characteristics<ref name=ch03r4 />

* Accumulations occur above or near to the pod of active source rock.

* [[Accumulation]]s occur above or near to the pod of active source rock.

* Lateral migration distances are short.

* Lateral migration distances are short.

* Multiple, stacked accumulations usually contain the same genetic oil.

* Multiple, stacked accumulations usually contain the same genetic oil.

Laterally drained systems have the following characteristics:

Laterally drained systems have the following characteristics:

* Oil accumulations generally occur in thermally immature strata located far from the pod of active source rock.

* Oil [[accumulation]]s generally occur in thermally immature strata located far from the pod of active source rock.

* Accumulations containing oil that migrated long distances on average account for 50% of the entrapped oil.

* Accumulations containing oil that migrated long distances on average account for 50% of the entrapped oil.

* A single reservoir of the same age as the active source rock contains most of the entrapped oil and gas.

* A single reservoir of the same age as the active source rock contains most of the entrapped oil and gas.