Fluids which may occur in petroleum reservoir, either naturally or as a result of Anthropogenic Invasion:
| Liquid hydrocarbons | Gaseous hydrocarbons | Water |
|---|---|---|
| Oil including Solution Gas | Natural Gas | Formation water |
| Condensate | Injection Gas | Injection water |
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum reservoir