The OPEC+ alliance has officially postponed its critical oil production capacity assessment from the end of September 2026 to mid-November 2026. According to sources familiar with the matter, the delay stems from regional military conflicts disrupting infrastructure expansion projects across the Middle East, alongside several member states failing to submit required production data on time.
Originally ordered in late 2025, the comprehensive review evaluates maximum sustainable production capacities for member countries. The findings serve as essential reference baselines for determining national output quotas for 2027. The ongoing conflict involving Iran has directly stalled various expansion initiatives, throwing long-term supply projections into uncertainty and complicating a politically sensitive quota-setting process.
Independent Assessments and Excluded Nations
Independent petroleum consultancy DeGolyer and MacNaughton is compiling the capacity estimates used for the upcoming evaluation. However, the scope of the assessment is restricted; sanctioned nations including Russia, Iran, and Venezuela are excluded from the external review process.
DeGolyer and MacNaughton is now scheduled to submit its finalized report to the wider alliance in mid-November. This adjusted timeline still allows the producer group to analyze the findings ahead of its crucial late-November ministerial meeting.
Implications for Global Quotas and Alliance Unity
Production capacity figures heavily influence how much individual member nations are legally permitted to pump under OPEC+ agreements. Delays in verifying these metrics create friction among member states competing for higher output allocations.
Disagreements over output capacity and quota shares have already strained alliance cohesion. The United Arab Emirates formally exited the coalition in May after pushing unsuccessfully for higher baseline allowances to match its expanded domestic capacity. Meanwhile, Iraq has similarly voiced grievances over its assigned quotas, prompting ongoing internal evaluations regarding its future within the organization.
Frequently Asked Questions
Why did OPEC+ delay its production capacity review?
The review was postponed because regional conflicts in the Middle East disrupted expansion projects, and several member countries failed to submit necessary production data on time.
When is the new deadline for the capacity assessment?
The independent consultancy DeGolyer and MacNaughton is now expected to deliver its final report by mid-November 2026, ahead of the group’s late-November meeting.
Which countries are excluded from the independent review?
Nations currently operating under international sanctions-specifically Russia, Iran, and Venezuela-are excluded from the external capacity evaluation.
How do these capacity reviews affect oil output quotas?
The assessments provide independent verification of maximum sustainable production volumes, which act as baseline reference figures when negotiating individual member quotas for the upcoming year.
