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August 2, 2026, 2:22 PM · Data Story · 9 min read

Seven OPEC+ producers' June shortfall to IEA targets was 38 times their September adjustment

On 2 August, [seven OPEC+ producers approved a combined 188,000-barrel-a-day production adjustment for September](https://www.opec.org/pr-detail/611-2-august-2026.html). Our reconstruction of the [IEA's June estimates](https://www.iea.org/reports/oil-market-report-july-2026) found a 7.20 million-barrel-a-day shortfall to its implied targets, but that comparison measures scale, not compliance, future production or price impact.

By Cumulant Research

Hover or tap an underlined term to see its definition.

Aerial photograph of large circular oil-storage tanks at the Ras Markaz Oil Storage Park in the desert of Oman.
The Ras Markaz Oil Storage Park in Oman, one of the seven countries behind the September OPEC+ decision, represents the physical infrastructure separating a production target from delivered oil. Photo: AbdullahAlMaani, CC BY-SA 4.0, via Wikimedia Commons

The quick version

  • [Saudi Arabia, Russia, Iraq, Kuwait, Kazakhstan, Algeria and Oman approved a combined September production adjustment of 188,000 barrels a day](https://www.opec.org/pr-detail/611-2-august-2026.html). The decision changed their permitted production levels but did not measure new output.
  • [The IEA estimated the seven countries' June crude supply at 23.25 million barrels a day and their combined implied target at 30.45 million](https://www.iea.org/reports/oil-market-report-july-2026). The difference was 7.20 million barrels a day.
  • The June shortfall was 38.3 times the September adjustment. Put another way, the adjustment was 2.6% as large as the shortfall.
  • [Saudi Arabia, Iraq and Kuwait accounted for 6.60 million barrels a day of the country-level shortfalls](https://www.iea.org/reports/oil-market-report-july-2026), while Kazakhstan and Oman partly offset them by producing above their IEA implied targets.
  • The comparison does not establish noncompliance or predict September supply. [OPEC said compensation obligations remain](https://www.opec.org/pr-detail/611-2-august-2026.html), and the September compensation-adjusted targets and measured output were not yet available.

Figure

June's shortfall was 38.3 times the September adjustment

Aggregate IEA implied target minus June supply, divided by the OPEC+ September adjustment

38.3

times larger

7.20 mb/d June shortfall divided by 0.188 mb/d September adjustment

The calculation is 7.20 divided by 0.188, which equals 38.3 after rounding. The two inputs describe different things: the September figure is a policy adjustment, while the June figure is a shortfall calculated from IEA estimates.

Source: OPEC, 2 August 2026: https://www.opec.org/pr-detail/611-2-august-2026.html; IEA Oil Market Report, July 2026: https://www.iea.org/reports/oil-market-report-july-2026 · ratio · June and September 2026

Why it matters

The calculation shows that the latest OPEC+ adjustment is small relative to the disruption visible in June supply estimates, limiting what the policy announcement alone can reveal about near-term physical availability. Oil markets, energy-intensive industries and consumers will be affected only if permitted production becomes actual output that can move through transport routes such as the Strait of Hormuz. Production, exports, inventories and refinery activity are therefore more consequential than the headline adjustment by itself.

A permission slip, not 188,000 delivered barrels

[OPEC+'s 2 August statement approved a combined production adjustmentproduction adjustmentIn this agreement, a production adjustment changes the amount of a voluntary reduction being applied and therefore changes the permitted production level. of 188,000 barrels a day for September](https://www.opec.org/pr-detail/611-2-august-2026.html). The statement changed an agreed production level. It did not report that an additional 188,000 barrels had already been produced or exported.

A production targetproduction targetA production target is the output level assigned under an agreement, functioning as an upper limit rather than a minimum that must be produced. works like a speed limit. It sets the highest agreed rate, but it does not order a producer to reach that rate. Actual supply can remain lower because of another production obligation, a commercial decision, damage to infrastructure, transport trouble or a lack of usable capacity.

The distinction matters because [the IEAIEAThe International Energy Agency is an [intergovernmental organization within the OECD framework](https://www.iea.org/about/leadership/membership/structure) that publishes energy data and analysis. estimated that the seven producers supplied 23.25 million barrels a day in June against a combined implied target of 30.45 million](https://www.iea.org/reports/oil-market-report-july-2026). Subtracting supply from the target gives a 7.20 million-barrelbarrelA petroleum barrel is a unit of volume equal to [42 US gallons](https://www.eia.gov/tools/glossary/index.php?id=barrel).-a-day shortfall.

Figure

June's shortfall was 38.3 times the September adjustment

Aggregate IEA implied target minus June supply, divided by the OPEC+ September adjustment

38.3

times larger

7.20 mb/d June shortfall divided by 0.188 mb/d September adjustment

The calculation is 7.20 divided by 0.188, which equals 38.3 after rounding. The two inputs describe different things: the September figure is a policy adjustment, while the June figure is a shortfall calculated from IEA estimates.

Source: OPEC, 2 August 2026: https://www.opec.org/pr-detail/611-2-august-2026.html; IEA Oil Market Report, July 2026: https://www.iea.org/reports/oil-market-report-july-2026 · ratio · June and September 2026

Finding

The 0.188 million-barrel-a-day September adjustment was 2.6% as large as the 7.20 million-barrel-a-day June shortfall. In reverse, the shortfall was 38.3 times the adjustment.

How we rebuilt the June number

We first took the seven countries directly from [OPEC's September decision](https://www.opec.org/pr-detail/611-2-august-2026.html): Saudi Arabia, Russia, Iraq, Kuwait, Kazakhstan, Algeria and Oman. We then extracted their June supply estimates from the [IEA's July Oil Market Report](https://www.iea.org/reports/oil-market-report-july-2026).

The supply estimates, in million barrels a day, were Algeria 0.98, Iraq 1.96, Kuwait 1.37, Saudi Arabia 7.34, Kazakhstan 1.89, Oman 0.85 and Russia 8.86. Together they equal 23.25 million barrels a day.

The corresponding IEA implied targets were Algeria 0.99, Iraq 4.35, Kuwait 2.63, Saudi Arabia 10.29, Kazakhstan 1.60, Oman 0.83 and Russia 9.76 million barrels a day. Together they equal 30.45 million.

Our sign convention is target minus supply. A positive result means supply was below the implied target. A negative result means supply exceeded it. The IEA's published table presents the same relationship in the opposite direction, as supply minus target.

Figure

Three countries supplied most of the June shortfall

IEA implied target minus estimated crude supply; negative values mean supply exceeded the implied target

Saudi Arabia
2.95
Iraq
2.39
Kuwait
1.26
Russia
0.91
Algeria
0.01
Oman
-0.02
Kazakhstan
-0.29

The chart crosses zero because Kazakhstan and Oman were above their implied targets. The IEA's published country values are rounded, so the displayed bars sum to 7.21 mb/d rather than the 7.20 mb/d obtained by subtracting the displayed aggregate supply from the aggregate implied target.

Source: IEA Oil Market Report, July 2026: https://www.iea.org/reports/oil-market-report-july-2026 · million barrels per day · June 2026

[Saudi Arabia, Iraq and Kuwait contributed 2.95, 2.39 and 1.26 million barrels a day respectively](https://www.iea.org/reports/oil-market-report-july-2026). Their combined shortfall was 6.60 million barrels a day. Kazakhstan and Oman partly offset the total because their estimated supply exceeded their implied targets by 0.29 and 0.02 million barrels a day.

Why this is not a scorecard for compliance

Producing below an upper limit is not, by itself, a breach of that limit. OPEC's monitoring committee said it reviewed [May and June production data and noted overall conformityconformityConformity is OPEC+'s term for adherence to the production adjustments under its cooperation agreement. among participating OPEC and non-OPEC countries](https://www.opec.org/pr-detail/612-2-august-2026.html). That statement did not publish a country-by-country compliance verdict for the seven producers in this analysis.

CompensationCompensationCompensation requires a country that previously produced above its adjusted limit to make additional reductions later, a commitment [OPEC reaffirmed on 2 August 2026](https://www.opec.org/pr-detail/611-2-august-2026.html). makes the comparison more complicated. [OPEC said the seven countries intend to compensate fully for earlier overproduction](https://www.opec.org/pr-detail/611-2-august-2026.html), while the [IEA said its implied targets include revised compensation reductions](https://www.iea.org/reports/oil-market-report-july-2026). A country's operative target can therefore be lower than its underlying production level.

The 7.20 million-barrel-a-day figure should consequently be read as the difference between two IEA estimates for June. It is not an official OPEC demand for 7.20 million additional barrels, a measure of withheld exports or proof that the countries broke their agreement.

The strongest caution is in the capacity column

The same [IEA table](https://www.iea.org/reports/oil-market-report-july-2026) estimated combined sustainable production capacitysustainable production capacityThe IEA defines sustainable production capacity as output that can be reached within [90 days and maintained for an extended period](https://www.iea.org/reports/oil-market-report-july-2026). of 32.96 million barrels a day for the seven countries. Their underlying levels in [OPEC's production table](https://www.opec.org/assets/assetdb/production-table-37th-onomm.pdf) sum to 31.01 million, before additional adjustments are applied.

OPEC's [38th ministerial meeting extended those overall production levels through 31 December 2026](https://www.opec.org/pr-detail/28-05-dec-2024.html), and its [41st meeting reaffirmed that policy on 7 June 2026](https://www.opec.org/pr-detail/605-7-june-2026.html). The IEA capacity estimate was therefore 1.95 million barrels a day above the seven countries' combined base levels.

Figure

The capacity estimate was well above June supply

Combined values for the same seven producers

June supply
23.25
OPEC base levels
31.01
IEA capacity estimate
32.96

The axis begins at zero. Sustainable capacity is an estimate of output reachable within 90 days, not proof that every barrel could be produced and exported immediately. Capacity in one country also cannot remove a field, pipeline or shipping constraint in another.

Source: IEA Oil Market Report, July 2026: https://www.iea.org/reports/oil-market-report-july-2026; OPEC production table: https://www.opec.org/assets/assetdb/production-table-37th-onomm.pdf; OPEC 38th Ministerial Meeting: https://www.opec.org/pr-detail/28-05-dec-2024.html; OPEC 41st Ministerial Meeting: https://www.opec.org/pr-detail/605-7-june-2026.html · million barrels per day · June 2026 and applicable OPEC base levels

That capacity estimate warns against treating June supply as a permanent physical maximum. It does not prove that all of the estimated capacity was immediately usable. The IEA defines sustainable capacity as output reachable within 90 days, and a barrel that can be produced eventually is not necessarily a barrel that can be shipped today.

The [IEA described June as a partial recovery from severe disruption](https://www.iea.org/reports/oil-market-report-july-2026): Gulf production rose by 3.5 million barrels a day during the month but remained 11.4 million below its pre-war level. That regional evidence makes June an especially risky month from which to infer lasting production capability.

Why the Strait matters without explaining everything

The [Strait of HormuzStrait of HormuzThe Strait of Hormuz is the narrow sea passage between Oman and Iran that connects the Persian Gulf with the Gulf of Oman and the Arabian Sea, according to the [US Energy Information Administration](https://www.eia.gov/international/analysis/special-topics/World_Oil_Transit_Chokepoints). connects the Persian Gulf with the Gulf of Oman and the Arabian Sea](https://www.eiaeiaThe US Energy Information Administration is a statistical agency within the US Department of Energy that publishes policy-independent energy data and analysis, according to its [information-quality guidance](https://www.eia.gov/about/information_quality_guidelines.php)..gov/international/analysis/special-topics/World_Oil_Transit_Chokepoints). It is a chokepointchokepointA chokepoint is a narrow transport route where a disruption can delay a much larger flow of trade. because a narrow passage carries a large volume of energy trade, so interrupted tanker traffic can prevent otherwise producible oil from reaching buyers.

The IEA linked the June recovery in Gulf output and exports to improving tanker movement through the Strait. That account provides important context for Saudi Arabia, Iraq and Kuwait, but it does not establish one common cause for every country-level gap. Russia, Kazakhstan, Algeria and Oman face different production, infrastructure and commercial conditions.

Our calculation therefore remains descriptive. It shows where the IEA's June supply estimates sat relative to its implied targets. It does not assign the differences to the Strait, production policy, damaged infrastructure or any other single cause.

What the comparison says about September

The ratio answers one narrow question: the September policy adjustment was small beside the seven producers' aggregate June shortfall to the IEA's implied targets. It amounted to roughly one barrel of additional permitted production for every 38 barrels in the June shortfall.

It does not tell us how much the seven will produce in September. That requires the September country targets after compensation, measured September production and evidence on whether fields and transport routes are operating.

It also does not identify a market reactionmarket reactionMarket reaction means an immediate movement in traded prices after investors receive new information.. A same-day oil-price movement can reflect war news, demand expectations, inventories, currencies and other information arriving alongside an OPEC+ announcement. Isolating the announcement's price effect would require a separate market study.

The economic effecteconomic effectEconomic effect means a later change in physical production, exports, inventories, refining activity, costs or consumption. will appear, if at all, in later physical data such as production, exports, inventories and refinery activity. Until those observations exist, the defensible conclusion is about scale: 0.188 million barrels a day of additional permission versus a 7.20 million-barrel-a-day June shortfall to IEA targets.

What to watch

  • September country targets after compensation obligations are applied.
  • Measured September production and exports from the seven participating countries.
  • Tanker traffic and shipping conditions through the Strait of Hormuz.
  • Whether later production, inventory and refinery data show a physical supply increase.

How we did this

  • We treated [OPEC's 2 August 2026 statement](https://www.opec.org/pr-detail/611-2-august-2026.html) as the primary source for the seven participating countries, the September timing and the combined 188,000-barrel-a-day adjustment.
  • We treated the [IEA July 2026 Oil Market Report](https://www.iea.org/reports/oil-market-report-july-2026) as the source for June supply, implied targets and sustainable capacity. These are IEA estimates, not OPEC's own production figures.
  • We summed the seven published June supply estimates to obtain 23.25 million barrels a day and the seven implied targets to obtain 30.45 million barrels a day.
  • We calculated the aggregate June shortfall as 30.45 minus 23.25, producing 7.20 million barrels a day.
  • We converted OPEC's 188,000-barrel-a-day adjustment to 0.188 million barrels a day, then calculated 7.20 divided by 0.188 to obtain 38.3 and 0.188 divided by 7.20 to obtain 2.6%.
  • For the country chart, we reversed the sign of the IEA's supply-minus-target column so that positive values indicate supply below the implied target. Because the IEA publishes rounded country values, the displayed country bars do not reproduce the aggregate difference exactly.
  • We summed the seven capacity estimates in the [IEA table](https://www.iea.org/reports/oil-market-report-july-2026) to obtain 32.96 million barrels a day and the seven underlying levels in [OPEC's production table](https://www.opec.org/assets/assetdb/production-table-37th-onomm.pdf) to obtain 31.01 million.
  • We separated description from causation. The analysis compares policy and production estimates but does not claim that OPEC+ policy caused the June shortfall or that the September adjustment will cause a particular change in supply or prices.

What this cannot establish

  • The comparison joins two different constructs: an official [OPEC+ policy adjustment](https://www.opec.org/pr-detail/611-2-august-2026.html) and [IEA estimates of supply and implied targets](https://www.iea.org/reports/oil-market-report-july-2026).
  • June supply is compared with a September policy change. Conditions, compensation requirements and production could change between those months.
  • The IEA country values are published to two decimal places in million barrels a day, so calculations from the displayed country rows contain rounding error.
  • The IEA implied target includes extra voluntary and revised compensation reductions, but the report does not provide a complete public derivation of every country adjustment in the displayed table.
  • Sustainable capacity is an estimate of output reachable within 90 days. It does not demonstrate immediate access to fields, pipelines, terminals, storage or shipping.
  • As of the 2 August decision, measured September output did not exist, and the OPEC statement did not publish the future IEA implied targets used in this analysis.

This is AI-assisted analysis under stated assumptions; it is not investment advice or a price target. Figures are as of the publication date and trace to the cited sources; markets and disclosures change.

Sources

  1. 01Saudi Arabia, Russia, Iraq, Kuwait, Kazakhstan, Algeria, and Oman adjust production and reaffirm commitment to market stability, Organization of the Petroleum Exporting CountriesPrimary
  2. 02Oil Market Report, July 2026, International Energy AgencyData
  3. 0367th Meeting of the Joint Ministerial Monitoring Committee, Organization of the Petroleum Exporting CountriesPrimary
  4. 04Required Production Level for 2025, Organization of the Petroleum Exporting CountriesData
  5. 0538th OPEC and non-OPEC Ministerial Meeting, Organization of the Petroleum Exporting CountriesPrimary
  6. 0641st OPEC and non-OPEC Ministerial Meeting, Organization of the Petroleum Exporting CountriesPrimary
  7. 07World Oil Transit Chokepoints, US Energy Information AdministrationData
  8. 08Glossary: Barrel, US Energy Information AdministrationPrimary
  9. 09Glossary: Crude Oil, US Energy Information AdministrationPrimary
  10. 10Structure of the IEA, International Energy AgencyPrimary
  11. 11About EIA, US Energy Information AdministrationPrimary
  12. 12EIA Information Quality Guidelines, US Energy Information AdministrationPrimary
  13. 13Nine years for the historic Declaration of Cooperation, Organization of the Petroleum Exporting CountriesPrimary
OPEC+oilSaudi ArabiaRussiaStrait of Hormuzcommodity marketsenergy securitydata journalismSaudi ArabiaRussiaIraqKuwaitKazakhstanAlgeria

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