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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.
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 ...
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).
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 ...
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 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.
The reserve list specifies different types of coal and includes countries with at least 0.1% share of the estimated world's proven reserves of coal. All data are taken from the German Federal Institute for Geosciences and Natural Resources (BGR) via BP; all numbers are in million tonnes. [1]
The largest reserves are found in the Western Offshore (37%) and Assam (27%). The estimated reserves of natural gas in India as of 1 April 2021 was 1,372.62 BCM, increasing by 0.52% from the previous year. The largest reserves of natural gas are located in the Eastern Offshore (40.6%) and the Western Offshore (23.7%). [15]