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Glossary:Water injection
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Introducing water into a subsurface horizon that may or may not include a hydrocarbon accumulation or reservoir. This includes (Salt) Water Disposal; Pressure Maintenance and Water Flood Operations. The water may come from one or multiple sources, including production or stimulation operations, surface sources (a river, lake or the sea); or from a separate subsurface aquifer. Water sourced from production operations or surface sources are generally treated prior to injection.