récupération secondaire

DEF: [...] phase d'extraction du pétrole de ses gisements naturels qui met en œuvre des moyens énergétiques supplémentaires, soit après épuisement des énergies naturelles, soit en complément de l'énergie naturelle dès le début de l'exploitation.
OBS: récupération secondaire : terme normalisé par l'ISO.

CONT: Secondary recovery of oil. When a large part of the crude oil cannot be recovered simply by allowing the original reservoir pressure to furnish the driving energy, a method for supplying extra energy must be found. Usually, an injected fluid such as water or gas replaces the produced oil and thus maintains the reservoir pressure. When this procedure substantially increases the potential production of oil, it is called secondary recovery.
CONT: Secondary Recovery. Secondary recovery methods are used to obtain additional oil from wells that have ceased to produce at an economical rate.