The Water Injection method used in oil production is where water is injected back into the reservoir usually to increase pressure and thereby stimulate production. Water injection wells are typically found offshore. This method is used to increase oil recovery from an existing reservoir- Water is injected to force unrecovered oil out of reservoir rock and into nearby oil wells.
Example Usage of Injection
jrmk: Worse stiff neck EVER. Lying on a bed is NOT an option - I have no idea how to go through this night... ER+Injection?
thirtysix: Swine flu Injection site now very uncomfortable, not helping with sleep, nor is the people upstairs having their TV on loud at half midnight