Linked from
The 11 pages that link to Petroleum reservoir, each with the reason it gives.
PorosityRelated: Reservoir porosity sets how much hydrocarbon the rock can store.
Crude oilRelated: Reservoir rocks hold crude oil beneath the surface until wells reach it.
Petroleum industryRelated: Reservoir properties determine how much petroleum a field can produce.
Reservoir rockBroader topic: It is the principal setting for conventional oil and gas production.
Oil wellRelated: An oil well must connect to reservoir rock for hydrocarbons to flow.
Carbonate rockRelated: Porous carbonate formations host important oil and gas reservoirs.