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OPEC and EIA Oil Reserve Reporting

Discrepancies in oil reserve reporting between OPEC and the U.S. Energy Information Administration due to different methodologies and data sources.

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Jan 6, 2026

How do OPEC and the EIA calculate and reconcile differences in national proven oil reserves?

OPEC and the U.S. Energy Information Administration (EIA) both report “proven” oil reserves but use different reporting chains, definitions and data sources, which produces persistent discrepancies ra...