Organization of the Petroleum Exporting Countries (OPEC)

The Organization of the Petroleum Exporting Countries (OPEC) is an intergovernmental organisation through which member governments co-ordinate petroleum policies and make collective production decisions. Its mission concerns policy co-ordination, market stability, regular supply and returns to producers and investors. OPEC is a platform for market management and potential state leverage, but is not itself a sovereign sender. Production decisions and price effects do not establish coercive intent.

Foundation, mandate and governance

Iran, Iraq, Kuwait, Saudi Arabia and Venezuela founded OPEC at the Baghdad Conference in September 1960. It has been headquartered in Vienna since 1965. Its Statute defines its objectives, membership rules and organs.

The Conference is OPEC's supreme authority. The Board of Governors directs administration under the Statute, while the Secretariat supports meetings, research and publications. The Secretariat does not command national production.

OPEC's state nexus is delegated. Governments act through its organs and implement policy through national authority, state-owned enterprises, contracts and domestic industry structures. Conference decisions, national instructions and producer responses are separate stages.

As at 29 July 2026, OPEC had 11 members after the United Arab Emirates left OPEC and the Declaration of Cooperation with effect from 1 May 2026. The 2026 Annual Statistical Bulletin, published on 29 April with data largely through 2025, does not establish membership after the withdrawal.

Production co-ordination and market influence

OPEC's central instrument is co-ordinated production policy. Ministerial decisions can establish targets, adjustments or other arrangements, which governments and national producers implement. Actual output can differ because of capacity, exemptions, compliance, disruption or unilateral policy.

Production targets and voluntary adjustments are not identical. Analysis must use the official category, name participants and implementation period, and distinguish capacity, quota, target, production and exports.

Members hold substantial petroleum reserves and supply a material share of world oil. Reserves, crude production and liquids production use different definitions and denominators; any figure needs a period and comparison.

Influence also depends on demand, inventories, spare capacity, non-member supply, sanctions, wars, expectations and substitution. A post-meeting price movement does not prove that OPEC caused it or achieved an attributed objective.

The Declaration of Cooperation and OPEC+

OPEC members and participating non-OPEC producers adopted the Declaration of Cooperation on 10 December 2016. Commonly called OPEC+, it is neither a separate treaty organisation nor a class of OPEC membership.

OPEC acts through its Statute, while Declaration of Cooperation participants act through the co-operative framework and national authorities. Smaller groups may announce voluntary adjustments. Each action needs an identified decision-maker, participants, baseline and implementation.

Geopolitical alignment can affect bargaining, but participation does not prove entry into a coercive campaign. Market management, revenue protection, precaution, signalling and pressure are different purposes. Coercive intent requires decision-specific evidence.

OPEC, OAPEC and the 1973 oil embargo

The 1973 oil crisis is often mislabelled an OPEC embargo. Arab oil exporters imposed embargoes and selected targets through state decisions associated with the Organization of Arab Petroleum Exporting Countries (OAPEC). OPEC price and production developments were connected but distinct.

The embargo, production cuts and posted-price decisions require separate analysis. OAPEC and participating governments owned target selection. OPEC supplied a forum for co-ordination and price decisions involving a different membership.

The episode documents political oil leverage by participating Arab states, not a standing coercive purpose behind later OPEC adjustments.

Strategic purpose and contestation

OPEC's ordinary mandate is declared, but coercive purpose is not applicable to its activity as a whole. Strategic uses of production, exports or pricing belong in case records identifying sender, target, objective, forum, instrument and evidence.

Calling OPEC a cartel is common but should be attributed because its formal status is intergovernmental and national petroleum industries differ. Competition-law analogies, sovereign immunity and producer co-ordination remain contested.

Claims that a producer changed output to discipline a violator, weaken a rival or attack an industry require direct evidence. Revenue needs, market share, disruption and internal bargaining provide competing explanations.

Statecraft significance and sequence placement

OPEC is statecraft context because it organises collective decisions over a strategic commodity. Divergent fiscal needs, capacity, compliance, demand response and non-member supply also constrain co-ordination.

It remains in the context sequence. Existence, market share and routine policy do not satisfy purposive statecraft without evidence of public authority, objective, sender-target relationship and intended transmission.

See also

Organization of Arab Petroleum Exporting Countries · Arab oil embargo and production cuts (1973-1974) · Commodity weaponisation · Energy weaponisation · Oil embargo · Producer-state production coordination · Swing-producer price warfare · International Energy Agency

Sources

• OPEC, Statute, current edition checked 29 July 2026.
• OPEC, 'OPEC launches Annual Statistical Bulletin 2026' (29 April 2026).
• OPEC, Declaration of Cooperation (10 December 2016).
• OPEC, 'Declaration of Cooperation marks 9 years' (10 December 2025).
• OPEC, '7 countries reaffirm production adjustments following the June 2026 meeting' (16 June 2026).
• OPEC, '189th Meeting of the OPEC Conference concludes' (10 December 2024).
• OPEC, 'OPEC at 64: historical formation and milestones' (14 September 2024).
• Organization of Arab Petroleum Exporting Countries, 'History'.
• Organization of Arab Petroleum Exporting Countries, 'Frequently asked questions', checked 29 July 2026.
• Emirates News Agency, 'UAE announces decision to exit OPEC and OPEC+' (28 April 2026), official Arabic announcement, effective 1 May 2026.
• Dag Harald Claes and Giuliano Garavini, 'OPEC and the law and politics of oil-market co-ordination', Journal of World Energy Law and Business 17, no. 1 (2024): 19-35.