Barrel of oil equivalent
The barrel of oil equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel. The BOE is used by oil and gas companies in their financial statements as a way of combining oil and natural gas reserves and production into a single measure.
Although this energy equivalence does not take into account the lower financial value of energy in the form of gas.[citation needed]
Thermal unit[edit]
The U.S. Internal Revenue Service defines a BOE as equal to 5.8 million British thermal unit (BTU).[1] (5.8×106 BTU59°F [ 6.1178632×109 J ], about 1 BOE (6.1 GJ), or about 1 barrel of oil equivalent (1.7 MWh).) The value is necessarily approximate as various grades of oil and gas have slightly different heating values. If one considers the lower heating value instead of the higher heating value, the value for one BOE would be approximately 5.4 GJ. Typically, 1 barrel of oil equivalent (5,800 cubic feet of natural gas) or 58 CCF are equivalent to one BOE. The United States Geological Survey (USGS) gives a figure of 6,000 cubic feet (170 m3) of typical natural gas.[2]
Metric system barrel[edit]
A commonly used multiple of the BOE is the metric system barrel of oil equivalent (kboe or kBOE), which is 1,000 BOE. This should be avoided because it might lead to the use of MBOE (mega barrel of oil equivalent) but MBOE actually means thousand BOE. This potential confusion arises due to the use of Roman numeral M (one thousand) for natural gas production and MM (one million, even though MM means two thousand). In the S.I. (metric system) M means million, but cubic feet and barrels are not S.I. units, so S.I. prefixes should not be used. Another commonly used multiple is million barrels eqivalent per day, MMboed (or MMBOED, MMboepd, where MM denotes a million), used to measure daily production and consumption,[3] and the BBOe (also BBOE) or billion barrels of oil equivalent, representing 109 barrels of oil, used to measure petroleum reserves.[4]
Metric regions commonly use the tonne of oil equivalent (toe), or more often million toe (Mtoe). Since this is a measurement of mass, any conversion to barrels of oil equivalent depends on the density of the oil in question, as well as the energy content. Typically 1 tonne of oil has a volume of 6.8 to 7.5 barrels (1.08 to 1.19 m3). The United States EIA suggests, that 1 toe has an average energy value of 39.68 million British thermal units (41.9 GJ).[5]
See also[edit]
- Conversion of units
- A Cubic Mile of Oil
- Energy density
- Heat of combustion
- Miles per gallon gasoline equivalent
- Therm
- Tonne of oil equivalent
References[edit]
- ^ IRS publication
- ^ Table AR-1 USGS World Petroleum Assessment 2000, Description and results, USGS World Energy Assessment team
- ^ Energy Infocard retrieved 16 October 2008
- ^ USGS World Petroleum Assessment retrieved 16 October 2008
- ^ Conversion Factors retrieved 16 October 2008