[AZLiberty]

... 66 trillion cubic feet of undiscovered, technically recoverable shale natural gas, 74 million barrels of shale oil and 45 million barrels of natural gas liquids ...

A barrel of oil is equivalent, in energy content, to about 6000 cubic feet of natural gas. Hence 66 trillion cubic feet of gas is equivalent to around 10 billion barrels of oil, dwarfing the recoverable liquids.

[Owen]

Nat gas can keep you warm, but it doesn’t plant food or ship it to your grocery store shelves.

Only oil does that.