The proposition implied by the question is false.
A reserve is all of a resource that is attainable with current technology and for a profit. You always have to keep in mind that even though we may have the technology to access a specific deposit and extract a commodity (ie. Gold, Coal, Oil, Gas, etc) there must be a way to make a reasonable profit for the trouble of acquiring the commdity. Otherwise no company in their right mind will pay for it to be aquired/Dug up