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International Organisations & Relations25 Essential Exam Concepts
OPEC GK Facts, Global Oil Market & Geopolitics Study Guide
The Organization of the Petroleum Exporting Countries is an influential permanent intergovernmental organization founded at the Baghdad Conference in Iraq in September 1960. Established by five founding oil-producing developing nations—Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela—OPEC was formed to challenge the pricing domination of major Western multinational oil corporations historically known as the "Seven Sisters." Confronting an international petroleum market historically dictated by unilateral price cuts imposed by foreign corporate conglomerates, the founding nations sought to safeguard their sovereign national revenues and assert direct authority over domestic mineral assets. Registered with the United Nations Secretariat in 1962 pursuant to UN Resolution 6363, the organization maintained its initial administrative headquarters in Geneva, Switzerland, before permanently relocating to Vienna, Austria, in September 1965.
OPEC functions as an international commodity cartel that coordinates and unifies petroleum production policies among sovereign member countries. Its formal mandate seeks to secure fair, stable crude oil prices for petroleum producers, ensure an efficient, regular supply of petroleum to consumer nations, and provide an equitable return on capital invested in the petroleum extraction sector. The supreme authority of the organization is the OPEC Conference, where national energy ministers convene semi-annually to review global macroeconomic projections and assign national crude production quotas. Price movements are monitored against the OPEC Reference Basket, a weighted average price index of representative petroleum blends from member countries.
To maintain market stability in an era of surging non-OPEC shale oil production, OPEC formed an expanded alliance known as OPEC+ in late 2016 through the signing of the landmark Declaration of Cooperation. This broader grouping integrated ten non-OPEC oil-producing states led by the Russian Federation, encompassing Kazakhstan, Mexico, Azerbaijan, and Oman. Collectively controlling roughly forty percent of global crude oil production and over seventy percent of the world's proven oil reserves, decisions taken by OPEC+ regarding output cuts or supply expansions directly affect international energy prices, global inflationary trends, sovereign trade balances, and geopolitical diplomacy worldwide. Through scheduled ministerial consultations and collaborative output adjustments, the expanded alliance exercises significant systemic leverage over global petroleum trade dynamics and macroeconomic stability.
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The Organization of the Petroleum Exporting Countries (OPEC) was founded on September 14, 1960, at the Baghdad Conference in Iraq.
The five original founding member countries of OPEC were Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela.
OPEC was established to assert sovereign control over domestic petroleum resources against foreign multinational corporations known as the "Seven Sisters".
OPEC was registered with the United Nations Secretariat on November 6, 1962, under United Nations Resolution No. 6363.
OPEC was initially headquartered in Geneva, Switzerland, from 1960 to 1965, before moving its permanent headquarters to Vienna, Austria, in September 1965.
As of 2026, OPEC consists of 12 member nations across the Middle East, Africa, and South America.
Notable historical departures from OPEC include Ecuador (withdrew in 2020), Qatar (withdrew in 2019 to focus on LNG), and Angola (withdrew in late 2023).
The supreme decision-making authority of the organization is the OPEC Conference, composed of national delegations headed by petroleum ministers.
The OPEC Secretariat is headed by the Secretary General, who acts as the legally authorized executive representative of the organization.
The OPEC Reference Basket (ORB) acts as a primary benchmark price index, calculated as a weighted average of crude oil grades produced by member states.
In December 2016, OPEC members signed the landmark Declaration of Cooperation with 10 non-OPEC oil producers, forming the OPEC+ alliance.
The Russian Federation is the leading non-OPEC partner in the OPEC+ coalition, which also includes nations such as Kazakhstan, Oman, and Mexico.
OPEC+ member nations collectively control approximately 40% of global crude oil production and over 70% of the world’s proven crude oil reserves.
OPEC member nations hold approximately 80% of the world’s total proven crude oil reserves, with the largest share located in Venezuela and Saudi Arabia.
The 1973 "First Oil Shock" occurred when Arab members of OPEC (OAPEC) imposed an oil embargo during the Yom Kippur War, quadrupling world crude prices.
The 1979 "Second Oil Shock" resulted from the Iranian Revolution and subsequent Iran-Iraq War, severely disrupting global crude output.
Saudi Arabia frequently functions as the "swing producer" within OPEC, utilizing its substantial spare production capacity to stabilize prices.
In response to OPEC supply adjustments, consuming nations through the International Energy Agency (IEA) maintain Strategic Petroleum Reserves (SPRs).
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