Some common units used in the oil and gas industry are listed here as a representative selection of US and metric units, since both are used in different parts of the oil industry. The non-standard factors differ slightly between different sources.
API American Petroleum Institute crude grade
|
API = (141.5 / Specific gravity ) – 131.5
Spec gravity = 141.5/(API + 131.5) kg/l
|
Bl Barrel (of oil)
|
1 Bl = 42 Gallons
1 Bl = 159 liters
1 Bl equiv. to 5487 scf = 147 scm gas
|
Bpd Barrel per day
|
1 Bpd ≈ 50 tons/tons per year
|
BTU British thermal unit
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1 BTU = 0.293 Wh = 1,055 kJ
|
Cal Calorie
|
1 Cal = 4,187 J (Joules)
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MMscf Million standard cubic feet
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1 MMscf = 23.8 TOE ≈ 174 barrels
|
psi Pounds per square inch
|
1 psi = 6.9 kPa = 0.069 atm
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Scf Standard cubic feet (of gas) defined by energy, not a normalized volume
|
1 scf = 1000 BTU = 252 kcal
= 293 Wh = 1,055 MJ
≈ 0.0268 scm
|
Scm Standard cubic meter (of gas, also Ncm) Defined by energy content
|
1 Scm = 39 MJ = 10.8 kWh
1 Scm ≈ 37.33 Scf (not a volume conv.)
1 Scm ≈ 1.122 kg
|
TOE Tons oil equivalent
Range 6.6 - 8 barrels at
API range 8 - 52
|
1 TOE = 1000 kg = 1 Ton (metric) oil
1 TOE = 1 Tone oil (US)
1 TOE ≈ 7.33 Barrels (at 33 API)
1 TOE ≈ 42.9 GJ =11,9 MWh
1 TOE ≈ 40.6 MMBTU
1 TOE ≈ 1.51 ton of coal
1 TOE ≈ 0.79 ton LNG
1 TOE ≈ 1,125 Scm = 42,000 Scf
|
kWh Kilowatt hour = 1000 joules * 3600 S
|
1 kWh = 3.6 MJ = 860 kcal = 3,413 BTU
|
Product specific gravity, API grades
Product
|
Liters Per Ton (metric) |
API Grade
|
Specific Gravity (kg/m3) |
Barrels per Ton At 60°F |
LPG
|
1835
|
10
|
1000
|
6.29
|
Jet A-1
|
1254
|
18
|
934
|
6.73
|
Gasoline
premium/super
Gasoline regular
|
1353
1418
|
25
30
|
904
876
|
6.98
7.19
|
Kerosene
|
1273
|
33
|
860
|
7.33
|
Gas oil
|
1177
|
36
|
845
|
7.46
|
Diesel fuel
|
1159
|
39
|
830
|
7.60
|
Fuel oil 80 CST
|
1065
|
42
|
816
|
7.73
|
Fuel oil 180 CST
|
1050
|
50
|
780
|
8.06
|
Fuel oil 230 CST
|
1047
|
|||
Fuel oil 280 CST
|
1044
|
|||
Bitumen
|
979
|
CO2 Emissions from burning of coal and hydrocarbons
Product
|
Average Carbon No.
|
CO2 kg
per kg
|
CO2 kg
Per kWh
|
Other unit
|
Methane
|
1
|
2,75
|
0,178
|
1,92 kg CO2 / scm
|
Gasoline
|
8
|
3,09
|
0,241
|
2,28 kg CO2 / liter
|
Diesel
|
12
|
3,11
|
0,249
|
2,68 kg CO2 / liter
|
Fuel oil
|
25
|
3,12
|
0,268
|
3,97 kg CO2 / liter
|
Coal
|
1
|
3,67
|
0,325
|
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