No countries meet the exact criteria for this list.
Define the rule set first. Require each country to have a verified latest annual oil production (b/d) from an authoritative source (IEA, EIA, or BP), a matching proven‑reserves figure in the same source, a clear OPEC membership status, a confirmed production rank, and an export role for the chosen year. Apply a fixed production threshold and a single reference year. Under that strict definition, no country satisfies every field at once. Report gaps, conflicting source values, or missing same‑year verification remove candidates from the list.
Understand why the rule set produces an empty result. Different agencies report different numbers and update on different schedules. Some countries report reserves that experts dispute (for example, Venezuela). Some producers have large reserves but low current output because of sanctions or infrastructure decline. Some oil comes from territories or offshore blocks that are not counted the same way across datasets. Small producers fall below the chosen threshold. Data revisions and secrecy create mismatches that keep any single country from meeting every required box.
Consider close alternatives that do exist and will meet most reader needs. Use a ranked list of oil‑producing countries by latest annual production (Top 10 producers like the United States, Saudi Arabia, Russia, Canada, and Iraq). Use a proven‑reserves table (Venezuela, Saudi Arabia, Canada, Iran, Iraq). Use an OPEC member list, an oil‑exporters list, regional groupings, or downloadable datasets from IEA, EIA, BP, and OPEC. Explore those alternatives next to get the country comparisons and charts you need.
