proven reserves
noun [plural] (also proved reserves)Definition
› NATURAL RESOURCES the amount of gas or oil that is known to exist under the surface of the earth or under the sea and that is available for future use: In 2007, Canada had an estimated 179 billion barrels of proven reserves, second only to Saudi Arabia's 262 billion barrels.
(Definition of proven reserves noun from the Cambridge Business English Dictionary
© Cambridge University Press)
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