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Undiscovered Recoverable Oil 36-81 Billion Barrels Undiscovered Recoverable Gas l §~ .. 5)~~ Trillion Cu Ft * Marginal Probability Applied * * For regional distribution of inferred reserves. see tables 4 and 15. FIGURE !.-Undiscovered recoverable resources of crude oil and natural gas for the United States. Report~ as a range of values at 95-5 percent probability in billions of barrels for oil and trillions of cubic feet for gas.

Fi gur e 1.-Discovered and undiscovered recoverab l e quantities of crude oi l and na t u r al ga s in the United States. Undiscovered values are mean estima t es. Crude oil in bi ll ion barrels; total natura l gas in t ri ll ion cubic fee t.

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