12 naftat eksportivat arenguriiki ühendav alaline valitsustevaheline organisatsioon, mis koordineerib ja ühtlustab oma liikmesriikide nafta-poliitikat, international body created in 1961 by countries that produce and export petroleum, for the purpose of establishing common strategies designed to protect member interests by means of production quotas , permanent intergovernmental organisation of 12 oil-exporting developing nations that coordinates and unifies the petroleum policies of its member countries