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  2. Proven reserves - Wikipedia

    en.wikipedia.org/wiki/Proven_reserves

    Proven reserves (also called measured reserves, 1P, and reserves) is a measure of fossil fuel energy reserves, such as oil and gas reserves and coal reserves. It is defined as the "quantity of energy sources estimated with reasonable certainty, from the analysis of geologic and engineering data, to be recoverable from well established or known ...

  3. List of countries by proven oil reserves - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    In this way, Canada's proven reserves increased suddenly in 2003 when the oil sands of Alberta were seen to be economically viable. Similarly, Venezuela 's proven reserves jumped in the late 2000s when the heavy oil of the Orinoco Belt was judged economic.

  4. List of countries by natural gas proven reserves - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    There is some disagreement on which country has the largest proven gas reserves. Sources that consider Russia in possession of the world's largest proven reserves include the US CIA (47,600 cubic kilometers), [ 2 ] the US Energy Information Administration (EIA) (49,000 km 3 ), [ 3 ] and OPEC (48,810 km 3 ). [ 4 ]

  5. Oil by country - Wikipedia

    en.wikipedia.org/wiki/Oil_by_country

    Dependent territories, not fully recognized countries and supranational entities are not ranked. By default countries are ranked by their total proven oil reserves. Note that data related to one parameter may be more up to date than data related to some other. See also separate lists and their source pages: List of countries by proven oil ...

  6. Oil and gas reserves and resource quantification - Wikipedia

    en.wikipedia.org/wiki/Oil_and_gas_reserves_and...

    Reserves are defined in three sub-categories according to the system used in the PRMS: Proven (1P), Probable and Possible. Reserves defined as Probable and Possible are incremental (or additional) discovered volumes based on geological and/or engineering criteria similar to those used in estimating Proven reserves.

  7. Natural gas by country - Wikipedia

    en.wikipedia.org/wiki/Natural_gas_by_country

    Countries by natural gas proven reserves (2014), based on data from The World Factbook. This article includes a chart representing proven reserves, production, consumption, exports and imports of natural gas by country. Below the numbers there is specified which position a country holds by the corresponding parameter.

  8. World energy resources - Wikipedia

    en.wikipedia.org/wiki/World_energy_resources

    Countries by natural gas proven reserves (2014), based on data from The World Factbook. Natural gas is a widely available fossil fuel with estimated 850 000 km 3 in recoverable reserves and at least that much more using enhanced methods to release shale gas. Improvements in technology and wide exploration led to a major increase in recoverable ...

  9. Talk:List of countries by proven oil reserves - Wikipedia

    en.wikipedia.org/wiki/Talk:List_of_countries_by...

    The independent nation Republic of Ireland is in fact listed in the World Factbook January 2010 Oil reserves report with 0 proven reserves. The wikipedia contributor who copied the CIA Oil Reserves report into this article included only the 97 entities with proven reserves, and omitted the remaining 169 entities (CIA lingo for countries ...