Appendix 3
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
Petroleum 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.
Approximate energy content
1 Sm3 oil
1 Sm3 condensate
1000 Sm3 gas
1 tonne NGL
=
=
=
=
1.0 Sm3 o.e.
1.0 Sm3 o.e..
1.0 Sm3 o.e.
1.9 Sm3 o.e.
1 Sm³ natural gas
1 Sm³ crude oil
1 tonne coal equivalent
MJ
40
35 500
29 300
Conversion factors for volume
Gas
1 cubic foot
1 cubic metre
1 cubic metre
1 000.00 Btu
9 000.00 kcal
35.30 cubic feet
1 Sm3 crude oil
1 Sm3 crude oil
=
1 Sm gas
3
Crude oil
150 • FACTS 2013
1 Sm3
1 Sm3
1 tonne
1 barrel
1 barrel per day
1 barrel per day
6.29 barrels
0.84 toe
7.49 barrels
159.00 litres
48.80 tonnes per year
58.00 Sm3 per year
=
=
=
6.29 barrels
0.84 tonnes crude oil
(average for oil from the
­Norwegian continental shelf)
35.314 cubic feet
Conversion factors between
various units of energy
1 MJ
1 kWh
1 BTU
MJ
Megajoule
1
kilowatt hour
3.6
British thermal unit 0.001055
kWh
0.2778
1
0.000293
BTU
947.80
3412.10
1