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What is the difference between proven reserves and unproven reserves?
Proven reserves have been harvested already while unproven have not.
Proven reserves have a reasonable certainty of being recovered while unproven reserves do not.
Proven reserves have been mapped out adequately while unproven have not.
Proven reserves are publicly known while unproven are kept secret.
Unproven reserves are the most easily recoverable oil while proven reserves require secondary recovery to harvest.