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  2. List of countries by proven oil reserves - Wikipedia

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

    Because proven reserves include oil recoverable under current economic conditions, nations may see large increases in proven reserves when known, but previously uneconomic deposits become economic to develop. In this way, Canada's proven reserves increased suddenly in 2003 when the oil sands of Alberta were seen to

  3. 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 ...

  4. 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 ...

  5. 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 ]

  6. List of countries by natural gas production - Wikipedia

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

    Countries by natural gas proven reserves (2014), based on data from The World Factbook Natural gas production by region. This is a list of countries by natural gas production based on statistics from The U.S Energy Information Administration (EIA).

  7. 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 ...

  8. Category:Oil reserves by country - Wikipedia

    en.wikipedia.org/wiki/Category:Oil_reserves_by...

    Pages in category "Oil reserves by country" ... Oil by country * List of countries by proven oil reserves; C. Oil reserves in Canada ... Wikipedia® is a registered ...

  9. 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.