OPEC Share of World Crude Oil Reserves
According to current estimates, more than 80% of the world's proven crude oil reserves are located in OPEC Member Countries, with the bulk of OPEC oil reserves in the Middle East, amounting to 65% of the OPEC total.
OPEC Member Countries have made significant additions to their oil reserves in recent years, for example, by adopting best practices in the industry, realizing intensive explorations and enhanced recoveries. As a result, OPEC's proven oil reserves currently stand at 1,213.43 billion barrels.
For more information:
OPEC Annual Statistical Bulletin 2016