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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 ...
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. Though not classified as ...
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]
Consuming less or importing more oil prolongs the useful life of existing oil reserves. Between 1970 and 2007, due to declining production and increasing demand, net US imports of oil and petroleum products increased from 3.16 million barrels per day (502 × 10 ^ 3 m 3 /d) in 1970 to 12.04 million barrels per day (1.914 × 10 ^ 6 m 3 /d) in ...
Mineral Reserves are subdivided in order of increasing confidence into Probable Mineral Reserves or Proved Mineral Reserves. A Probable Mineral Reserve is the economically mineable part of an Indicated Mineral Resource, and in some circumstances, a Measured Mineral Resources. It includes diluting material and allowances for losses which may ...
Reserve estimates based on these are referred to as 1P, proven (at least 90% probability); 2P, proven and probable (at least 50% probability); and 3P, proven, probable and possible (at least 10% probability), respectively. [43] As stated previously, oil is divided up into different types, therefore those counting up reserves should keep that in ...
According to Russian Natural Resources Minister Sergey Donskoy, as of 1 January 2012, recoverable reserves of oil in Russia under category ABC1 (equivalent to proven reserves) were 17.8 billion tons and category C2 reserves (equivalent to probable and possible) were 10.9 billion tons. [2]