OPEC Members and OPEC+ Allies: Who Produces What and Why It Matters for Oil Markets
OPEC still matters. A handful of producers can shift a large share of crude supply.
For buyers, traders, and supply teams, the real question is not only membership, but production weight, coordination rules, and the commercial effect on timing, freight, and inventory planning. Since the UAE withdrew from both OPEC and OPEC+, the organization counts 11 members, and the cooperation framework adds 10 non-OPEC producers.
Who Is in OPEC, and Who Joins OPEC+?
The UAE had long been one of the group's larger producers, so older member lists and production tables that still include it need updating. For procurement and market planning, the cleanest starting point is always the primary source.
The official OPEC member-country page is the reference roster. Without the UAE, OPEC's members are Algeria, Congo, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Saudi Arabia, and Venezuela.
OPEC+ is the broader coordination framework built around the Declaration of Cooperation. OPEC says the 10 non-OPEC participants are Azerbaijan, Bahrain, Brunei Darussalam, Kazakhstan, Malaysia, Mexico, Oman, Russia, Sudan, and South Sudan.
In market terms, OPEC is the core bloc. OPEC+ is the wider coordination layer that extends supply management beyond OPEC alone. EIA explains that the arrangement was created in 2016 after weak prices and strong U.S. shale growth, and that coordinated targets still influence global oil prices.
Among the non-OPEC participants, Russia carries outsized weight, which is one reason the wider framework matters more than a simple roster of countries suggests.
Approximate Crude Oil Output by OPEC Member
OPEC's statistical bulletin is best read as a structural map, not as a spot quote. The rounded figures below show where the barrels sit among the remaining members and how uneven their weight is.
Approximate Crude Oil Output and Weight Inside OPEC
OPEC member | Approximate crude output | Relative weight inside OPEC |
|---|---|---|
Algeria | About 0.9 mb/d | Small, under 5% |
Congo | About 0.3 mb/d | Minor, around 1% |
Equatorial Guinea | About 0.1 mb/d | Minor, under 1% |
Gabon | About 0.2 mb/d | Minor, around 1% |
Iran | About 3.3 mb/d | Third, somewhat above a tenth |
Iraq | About 3.9 mb/d | Second, roughly a sixth |
Kuwait | About 2.4 mb/d | Around a tenth |
Libya | About 1.1 mb/d | Mid-sized, around 5% |
Nigeria | About 1.3 mb/d | Mid-sized, around 5% |
Saudi Arabia | About 9.0 mb/d | Largest by far, well over a third |
Venezuela | About 0.9 mb/d | Small, under 5% |
Total, excluding the UAE | Roughly 23 mb/d | 100% |
Takeaway: Saudi Arabia carries well over a third of OPEC crude output. Iraq and Iran form the second tier, with Kuwait close behind. The smaller members matter, but not at the same scale.
How to read the numbers
These are crude oil figures, not total liquids.
Capacity is different from output, so spare capacity should not be treated as already supplied barrels. (eia.gov)
Markets react to expected future supply as well as current flow.
Why the Weight Is So Uneven
Output is concentrated: Saudi Arabia, Iraq, Iran and Kuwait together account for most OPEC crude. The UAE's departure also means that a large Gulf producer now sets its output outside the group's targets.
For GCC, European, West African, and Mediterranean buyers, the commercial question is usually simple: who has the barrels, who can flex them, and how quickly can the market absorb the change?
At Nedjma, our NOOR-Trading division helps teams turn market signals into structured sourcing and contract decisions.
How OPEC+ Coordination Works
OPEC and OPEC+ do not run a single production system. They use meetings, shared targets, and market reviews. EIA notes that OPEC meets to set production targets.
In practice, the important variables are the baseline, the pace of adjustment, and conformity with the agreed level. A headline announcement only tells part of the story. Buyers and traders also need to know whether the market is watching announced targets, actual delivered barrels, or the gap between the two. (opec.org)
What B2B Buyers Should Watch
For procurement directors and traders, the commercial value is in the knock-on effects. OPEC and OPEC+ signals can change how much supply is expected, when cargoes are nominated, and how confidently a buyer can plan around the next delivery window.
Watch which large producers are carrying the adjustment, because a change in one or two heavyweight countries shifts the balance more than the same percentage move from a smaller member.
Keep the metric consistent. Crude oil, total liquids, and capacity are not interchangeable terms.
Track the gap between announced targets and delivered barrels, because the market often prices both.
Remember that expectations matter. EIA notes that prices can move before supply arrives if traders expect future changes.
For broader market context, our energy and market intelligence blog covers adjacent topics such as supply, logistics, and operational planning.
FAQ
What countries are in OPEC and which ones are in OPEC+?
OPEC now has 11 members: Algeria, Congo, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Saudi Arabia, and Venezuela, after the UAE withdrew from both OPEC and OPEC+. OPEC+ is the broader cooperation arrangement built around OPEC and the 10 non-OPEC participants named in official DoC materials. In other words, OPEC is the membership core, while OPEC+ is the wider coordination layer used to manage market communication and production alignment.
How much does Saudi Arabia produce compared with other OPEC members?
Saudi Arabia is the largest OPEC producer by a wide margin, at roughly 9 mb/d of crude, well over a third of the group's output. Iraq follows at close to 4 mb/d, then Iran at a little over 3 mb/d and Kuwait at around 2.4 mb/d. For commercial planning, that concentration matters more than the simple country count.
Why does OPEC+ include non-OPEC producers?
OPEC+ includes non-OPEC producers because coordination becomes more effective when it reaches beyond the OPEC membership itself. EIA explains that the arrangement was created in 2016 after weak prices and strong U.S. shale growth, and that Russia and other non-OPEC participants give the framework more market weight. The practical result is a broader supply signal, more shared monitoring, and a greater ability to influence balance expectations across the crude market.
How do OPEC production quotas work?
Quotas are collective targets that members review in meetings, rather than fixed output promises that ignore market conditions. The group discusses the balance of supply and demand, sets targets or adjustments, and then watches conformity. For buyers, the important part is not just the headline number. It is the baseline, the pace of any adjustment, and whether delivered barrels match the agreed level. That is why the same announcement can matter differently in different regions and loading windows.
What impact do OPEC and OPEC+ decisions have on global oil prices?
OPEC and OPEC+ decisions influence prices mainly through supply expectations and the actual barrels that follow. EIA says coordinated targets still affect global oil prices, and price effects vary with the size of the change, overall demand, and OPEC's response. The same is true for expectations. When traders think more supply is coming, prices can soften even before the extra barrels arrive. For supply teams, that means announcements, not only volumes, deserve attention.
What Comes Next?
If you want a structured way to turn this producer map into sourcing logic, contact the team at Nedjma or start from our homepage.
