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Fluids which may occur in petroleum reservoir, either naturally or as a result of anthropogenic invasion.
These are normally represented by hydrocarbons and water and with a minor mix of non-organic fluids:
| Liquid hydrocarbons | Gaseous hydrocarbons | Non-organic fluids |
|---|---|---|
| Oil including Solution Gas | Natural Gas | Formation water |
| Condensate | Injection Gas | Injection water |
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