Conversion factors
Oil equivalents (abbreviated o.e.) is a term used to sum up volumes of oil, gas, NGL and condensate. Such a total can be arrived at by applying a common property, such as energy, mass, volume or sales value.
The Norwegian Offshore Directorate uses a volumetric conversion of NGL to liquid and an energy conversion factor for gas, based on typical properties (*) on the Norwegian continental shelf.
* The properties of oil, gas and NGL vary from field to field and over time, but a common and constant conversion factor is used in the resource accounts for all discoveries and fields.
| 1 Sm3 oil | = | 1.0 Sm3 o.e. |
| 1 Sm3 condensate | = | 1.0 Sm3 o.e. |
| 1000 Sm3 gas | = | 1.0 Sm3 o.e. |
| 1 tonn NGL | = | 1.9 Sm3 o.e. |
| Crude oil | 1 Sm3 | 6.29 barrels |
| 1 Sm3 | 0.84 toe | |
| 1 tonne | 7.49 barrels | |
| 1 barrel | 159.00 litres | |
| 1 barrel per day | 48.80 tonnes per year | |
| 1 barrel per day | 58.00 Sm3 per year |
Approximate energy content |
|
| MJ | |
| 1 Sm3 sales gas | 40 |
| 1 Sm3 crude oil | 35 500 |
| 1 tonne coal equivant | 29 300 |
Conversion factors for volume |
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| 1 Sm3 crude oil | = | 6.29 barrels |
| 1 Sm3 crude oil | = | 0.84 tonnes crude oil |
| = | (average for oil from the Norwegian continental shelf) |
|
| 1 Sm3 gas | = | 35.3 cubic feet |
Conversion factors between various units of energy |
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| MJ | kWh | BTU | ||
| 1 MJ | Megajoule | 1 | 0.2778 | 947.80 |
| 1 kWh | kilowatt hour | 3.6 | 1 | 3412.10 |
| 1 BTU | British therminal unit | 0.001055 | 0.000293 | 1 |
| 1 barrel oil | ≈ | 159 litre |
| 1 Sm3 oil | ≈ | 6.29 barrels |
| 1 tonne oil | ≈ | 1.18 Sm3 oil |
| 1 Sm3 oil | ≈ | 0.84 tonne oil |
| 1 Sm3 gas | = | 35.3 scf gas |
| 1000 Sm3 gas | = | 1 Sm3 o.e. |
| 1 Sm3 NGL | = | 1 Sm3 o.e |
| 1 Sm3 condensate | = | 1 Sm3 o.e. |
Updated: 18/12/2023