...
One of the most popular high-level classification of the petroleum reservoirs is given by the recoverable volume (see Table 1) and permeability-viscosity (see Table 2).
Table 2. Permeability-viscosity classi
| High perm | Medium perm | Low perm | Shale | |
|---|---|---|---|---|
| Gas | ||||
| Gas condensate | ||||
| Light oil | ||||
| Oil | x | |||
| Heavy oil | x | x | ||
| Bitumen | x | x | x |
Red crosses x indicate reservoir-fluid combinations which are currently not exploited by Petroleum Industry.
...