The Organization of the Petroleum Exporting Countries (OPEC) (from 1960 )Iran (from 1960 )Iraq (from 1960 )Kuwait (from 1960 )Saudi Arabia (from 1960 )Venezuela (from 1961 )Qatar (from 1962 )Indonesia (from 1962 )Libya (from 1967 )United Arab Emirates (from 1969 )Algeria (from 1971 )Nigeria (from 2007 )Angola