How many gj in a barrel of oil

Prospective Resources have both an associated chance of discovery and a chance of development. Prospective Resources are further subdivided in accordance with the level of certainty associated with recoverable estimates assuming their discovery and development and may be sub-classified based on project maturity. About Cub Energy has an execution-focused team with strong in-country leadership and experience.

Press Releases. Capital Structure and Share Performance. Corporate Filings. Glossary of Terms. The heat content of typical petroleum products varies even more see Table 1. A nominal conversion factor is sometimes used for a barrel of crude oil, which is close to its actual average energy content:. With this definition, a correspondence can be established between millions of barrels of oil per day Mbd and quads per year:.

An energy equivalence for oil can also be specified in terms of energy per metric ton tonne. For the United States, the average was 7. This average, together with the nominal equivalence of 5. There are differing definitions in the literature of a tonne of oil equivalent toe. These choices correspond, respectively, to:. A corresponding larger unit, the gigatonne of oil equivalent Gtoe can be related to the exajoule and quad:.

Conversion factors for coal. Amounts of coal are described both in short tons and metric tons. For the United States in , the average was In a fairly widely used specification of a nominal value, the energy content of 1 tonne of coal equivalent is set equal to 7 x 10 9 calories [e.

Then, at a level of precision that makes the particular choice of "calorie" irrelevant:. As seen in Table 1, this nominal heat content is considerably higher than the average heat content of coal as presently consumed in the United States; it is, however, fairly close to the average heat content of coal used in the early s 3. Conversion factors for natural gas. Natural gas is made up largely, but not entirely, of methane CH 4 and its energy content is more uniform than that of coal.

For the U. In discussions of natural gas production and consumption it is also common to use the unit therm , where. Electricity sales. Electricity sales differ from net generation due to transmission losses. In , for example, the ratio of U. Efficiency for fossil fuel and nuclear sources. Actual generation efficiencies, limited by the Second Law of Thermodynamics and design practicalities, fall short of this. More specifically, for U. Primary energy and end-use energy.

The end-use energy and the energy losses are then individually tabulated, with the losses roughly twice as great as the end-use energy. However, this separation creates a possibly misleading asymmetry in comparisons among modes of energy use, because end-use losses are neglected for fossil fuels used directly and these losses sometimes are substantial. From the standpoint of energy resources, the interesting number is the primary energythe total energy consumed at the generating plant, whether used efficiently or wasted.

Different units can be used for the different quantities, for example cubic metres and barrels, both of which express volume. In Norway, we generally use the metric system International System of Units , but older American British units are also frequently used in the petroleum industry.

Assumptions regarding energy content per cubic metre gas and weight per volume unit NGL are examples of this. Oil and gas volumes are often stated in standard cubic metres Sm 3 , and for precise indication of volumes, the temperature and pressure at which they apply must also be stated.