Definitions and explanatory notes

Statistics published in this Review are taken from government sources and published data. No use is made of confidential information obtained by BP in the course of its business

Conversion factors

The conversion factors cover calculation between weight, volume and calorific measures. They provide data for crude oil, products, natural gas, LNG, electricity and solid fuels.

Reserves

Generally taken to be those quantities that geological and engineering information indicates with reasonable certainty can be recovered in the future from known reservoirs under existing conditions.

The total oil reserves estimates have been compiled using a combination of primary official sources, third-party data from the OPEC Secretariat, World Oil, Oil & Gas Journal and an independent estimate of Russian reserves based on official data and Chinese reserves based on information in the public domain. Canadian oil sands 'under active development' are an official estimate. Venezuelan Orinoco Belt reserves are based on the OPEC Secretariat and government announcements.

The data series for proved oil in this year’s Review does not necessarily meet the definitions, guidelines and practices used for determining proved reserves at company level, for instance, as published by the US Securities and Exchange Commission, nor does it necessarily represent BP’s view of proved reserves by country.

The total natural gas reserves estimates have been compiled using a combination of primary official sources and third-party data from Cedigaz and the OPEC Secretariat. The data series for proved gas reserves in this year’s Review does not necessarily meet the definitions, guidelines and practices used for determining proved reserves at company level, for instance as published by the US Securities and Exchange Commission, nor does it necessarily represent BP’s view of proved reserves by country.

The total coal reserves estimates are sourced from the World Energy Resources 2013 Survey, World Energy Council.

Reserves-to-production (R/P) ratio

If the reserves remaining at the end of any year are divided by the production in that year, the result is the length of time that those remaining reserves would last if production were to continue at that rate.

Percentages

Annual changes and shares of total in the tables for oil consumption, production, refining and trade movements could be calculated either on a volume (barrels per day) or on a weight (tonnes) basis. We have elected to use a weight basis when performing calculations on overall oil production and consumption data. We have used a volume basis when manipulating the oil product consumption, reserves, refining and trade data. Percentages have been calculated before the rounding of actuals.

Methodology

The Other renewables table shows consumption of commercial electricity produced from renewable sources. Electricity from renewable sources is converted to tonnes of oil equivalent following the same methodology used for nuclear and hydroelectricity and is included in the primary energy consumption calculation.

The primary energy values of nuclear and hydroelectric power generation, as well as electricity from renewable sources, have been derived by calculating the equivalent amount of fossil fuel required to generate the same volume of electricity in a thermal power station, assuming a conversion efficiency of 38% (the average for OECD thermal power generation).

Biofuels consumption continues to be included in oil consumption data (see footnotes to oil consumption table).

Fuels used as inputs for conversion technologies (gas-to-liquids, coal-to-liquids and coal-to-gas) are counted as production for the source fuel and the outputs are counted as consumption for the converted fuel.

The method used to estimate carbon emissions from energy consumption in this year’s Statistical Review has been revised. The attached PDF provides further details.

Rounding differences

Because of rounding, some totals may not agree exactly with the sum of their component parts.

Tonnes

Metric equivalent of tons.

Regional definitions

Country groupings are made purely for statistical purposes and are not intended to imply any judgment about political or economic standings.

North America

US (excluding US territories), Canada, Mexico.

South & Central America

Caribbean (including Puerto Rico), Central & South America.

Europe

European members of the OECD plus Albania, Bosnia-Herzegovina, Bulgaria, Croatia, Cyprus, The former Yugoslav Republic of Macedonia, Georgia, Gibraltar, Latvia, Lithuania, Malta, Montenegro, Romania and Serbia.

Commonwealth of Independent States (CIS)

Armenia, Azerbaijan, Belarus, Kazakhstan, Kyrgyzstan, Moldova, Russian Federation, Tajikistan, Turkmenistan, Ukraine, Uzbekistan.

Europe & Eurasia

This includes all countries listed above under the headings Europe and the Former Soviet Union.

Middle East

Arabian Peninsula, Iran, Iraq, Israel, Jordan, Lebanon, Syria.

North Africa

Territories on the north coast of Africa from Egypt to Western Sahara.

West Africa

Territories on the west coast of Africa from Mauritania to Angola, including Cape Verde and Chad.

East and Southern Africa

Territories on the east coast of Africa from Sudan to Republic of South Africa. Also Botswana, Madagascar, Malawi, Namibia, Uganda, Zambia, Zimbabwe.

Asia Pacific

Brunei, Cambodia, China, China Hong Kong SAR*, China Macau SAR*, Indonesia, Japan, Laos, Malaysia, Mongolia, North Korea, Philippines, Singapore, South Asia (Afghanistan, Bangladesh, India, Myanmar, Nepal, Pakistan and Sri Lanka), South Korea, Taiwan, Thailand, Vietnam, Australia, New Zealand, Papua New Guinea and Oceania.

*Special Administrative Region

Australasia

Australia, New Zealand.

OECD members (Organization for Economic Co-operation and Development)

Europe: Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, UK.
Other member countries: Australia, Canada, Chile, Israel, Japan, Mexico, New Zealand, South Korea, US.

OPEC members (Organization of the Petroleum Exporting Countries)

Middle East: Iran, Iraq, Kuwait, Qatar, Saudi Arabia, United Arab Emirates, North Africa: Algeria, Libya.
West Africa: Angola, Nigeria. South America: Ecuador, Venezuela.

European Union members

Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, UK.

Non-OECD (Organization for Economic Co-operation and Development)

All countries that are not members of the OECD.

Quoting from the Statistical Review

Publishers are welcome to quote from this document provided that they attribute the source to the BP Statistical Review of World Energy June 2016. However, where extensive reproduction of tables and/or charts is planned, permission must first be obtained from:

The Editor, BP Statistical Review of World Energy
BP p.l.c
1 St James's Square
London
SW1Y 4PD
UK

Email: sr@bp.com

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