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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 ...
Proven oil reserves are those quantities of petroleum which, by analysis of geological and engineering data, can be estimated, with a high degree of confidence, to be commercially recoverable from a given date forward from known reservoirs and under current economic conditions.
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 ]
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. Though not classified as contingent, some technical, contractual, or regulatory uncertainties preclude such reserves being classified as Proven.
Countries by natural gas proven reserves (2014), based on data from The World Factbook. This is a list of countries by natural gas exports based on statistics from the U.S. Energy Information Administration (EIA). The gas amounts in this list are the gross amount of natural gas exported. (So, for example, Greece is listed as exporting 11 ...
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 ...
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).
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.