What Must Be True for Saudi Arabia's Pipeline to Carry 5.8 Million Barrels a Day

A tracker estimate now broadly supports Riyadh's recovery figure. The public record still does not show how a system running around a destroyed pumping station achieves it.

EuroOilWatch · 9 October 2026 · OilWatch Network Analysis

On the morning of 6 October, Saudi Arabia's energy minister, Prince Abdulaziz bin Salman, told a forum in Manama that the East–West pipeline was "back up to 5.8 million barrels." He did not give a time unit or an averaging period. Reuters reported that oil pumped through the line had "reached 5.8 million barrels" as of that morning, and markets have treated the figure as a flow rate of 5.8 million barrels a day.

Read that way, it is a remarkable recovery. Drone attacks on 10–11 September damaged three of the system's eleven pumping stations. The line was shut on the 11th and restarted at a low rate on 22 September, when an oil industry source said full rates could take up to six weeks and a security source said six to eight.

The figure should not be dismissed because the recovery was fast. Saudi Aramco has spare equipment, deep engineering capacity and every reason to restore the route, and no outside observer can disprove a reading from Aramco's own meters. Since 5 October there has also been partial independent support: Kpler estimates that the line has returned to about 5.5 million b/d.

So the useful question is no longer whether the pipeline is carrying a large volume. It is how. The best public evidence on the line's hydraulics suggests that, with Pump Station 11 out of action, a rate near 5.8 million b/d requires at least one condition that has not been reported. This article sets out what those conditions are and how each can be tested.

What is established

The East–West system, also known as Petroline, carries crude about 1,200 km from Abqaiq to Yanbu on the Red Sea. It is the kingdom's main route around the Strait of Hormuz.

Its published capacity figures describe several configurations rather than one pipe:

The US Energy Information Administration describes 5 million b/d of crude capacity, temporarily expanded to 7 million b/d after some natural-gas-liquids (NGL) pipelines were converted to carry crude.
Aramco's 2019 prospectus gave a 5 million b/d base capacity, about 6.2 million b/d sustainable for six months using drag-reducing agent, and a temporary maximum of 7 million b/d.
In May 2026, Aramco chief executive Amin Nasser said the system had reached that 7 million b/d maximum.
Reuters reported in March, citing two industry sources, that Aramco was using drag-reducing agent to speed up flows. The chemical lowers turbulent friction inside the pipe.

Together these mean the 7 million b/d peak already included both converted lines and chemical friction reduction. Drag reducer cannot be treated as an unused reserve to be added on top of that peak after the attack.

The system has two main crude lines: the 56-inch AY-1L and the parallel 48-inch AY-1, which Engineering News-Record still described in September 2026 as the parallel 48-inch and 56-inch lines carrying crude.

The damage and the recovery

The damage was not uniform. WirtschaftsWoche, working with the satellite-analysis firm LiveEO, found:

Pump Station 11: three of five pump houses reduced to rubble, apparently by fire.
Pump Station 9: all five pump houses standing, two heavily sooted, and the pipework on site probably damaged.
Pump Station 8: a darker patch where the pipework runs. Its operating condition is not established.

Imagery from 17 September showed two new above-ground lines built around PS11 and, according to WirtschaftsWoche, apparently no auxiliary pumps yet. A bypass gives oil a path around damaged machinery. It does not replace the pressure the station used to add.

The published estimates then moved quickly:

Date	Estimate	Source
Before 10 September	about 5.5 million b/d	Kpler
22 September	restart at a low rate; 40% of capacity within a couple of days (security source), and Aramco aiming for 4 million b/d	Reuters sources
29 September	2.65 million b/d; return to 5.5 expected to take another month	Kpler
1 October	about 5.5 million b/d	Argus, unnamed source
2 October	more than 80% of capacity, roughly 6 million b/d through the 7 million b/d conduit	Bloomberg, unnamed source
5 October	about 5.5 million b/d, roughly 4 million available for export at Yanbu	Kpler, via Dow Jones
6 October	"back up to 5.8 million barrels"	Saudi energy minister

The Kpler figure is the only one from a named outside source. It is inferred from tanker loadings, inventory movements and estimated refinery demand, not read from a meter, and no underlying Kpler note has been published. It is corroboration, not measurement. It is also 0.3 million b/d below the minister's figure, and it arrived six days after Kpler itself expected the recovery to take a month.

The historical test case

The most useful published hydraulic evidence comes from Aramco's own engineers. In a 1993 Oil & Gas Journal paper, J.J. Dempsey and A.H. Al-Gouhi modelled surges on the system. For the AY-1L line, they reported that when Pump Station 11 tripped, flow fell from 3 million b/d and stabilised at 56% of design flow rate — about 1.68 million b/d if design flow equals the 3 million b/d the line was carrying — with Pump Stations 1 to 10 at or close to their high discharge-pressure limits. The paper does not state the design flow as a number; the calculations below make the same assumption.

The reason matters. Losing a station is not like losing one-eleventh of a pool of interchangeable pumps. The station before it must push oil across a doubled span and up the line's western elevation without exceeding its own pressure limit. The line can only carry what that limit allows.

The study is evidence, not a model of today's network. It covers one line in its early-1990s configuration. Pumps, controls and pressure ratings may have changed since, and it says nothing about how the 48-inch line or the converted NGL lines respond to losing PS11.

The threshold

The 56% result can still define a transparent test. Let A be the part of the 7 million b/d peak that depended on PS11. If that part falls to 56% and everything else holds its peak rate:

Post-damage rate = 7.0 − 0.44 × A

For 5.8 million b/d, A can be no more than 2.73 million b/d.

Peak flow dependent on PS11	Rate after losing PS11
2.73 million b/d	5.80 million b/d
3.0 million b/d	5.68 million b/d
4.0 million b/d	5.24 million b/d
5.0 million b/d	4.80 million b/d
6.0 million b/d	4.36 million b/d
7.0 million b/d	3.92 million b/d

This is a sensitivity test, not a measurement. What it shows depends on which lines lost the station.

If only the 56-inch AY-1L depended on PS11, the method gives about 5.4–5.7 million b/d. The upper figure assumes AY-1L carried its 3 million b/d design flow at the peak; the lower one splits Aramco's 6.2 million b/d drag-reducer rating between the two main lines. Kpler's 5.5 sits inside that range, and the minister's 5.8 sits just above it, within the uncertainty of the method. On this reading there is no material discrepancy.

If both main crude lines depended on PS11, the method gives about 4.3–4.8 million b/d:

2.0 from converted lines + 5.0 × 0.56 = 4.8 million b/d, if the converted NGL capacity is entirely independent of PS11 and the main lines carried their base 5 million b/d;
0.8 + 6.2 × 0.56 = 4.3 million b/d, if the main lines carried Aramco's 6.2 million b/d drag-reducer rating.

Both are generous. Each leaves the converted capacity untouched, and every calculation here assumes Pump Stations 8 and 9 deliver their full contribution, which the imagery does not establish.

On this reading, both the minister's 5.8 and Kpler's 5.5 are well above what the historical behaviour allows. From 4.8, reaching 5.8 needs 21% more throughput across the whole system, or about 36% more on the affected lines. Aramco's entire disclosed drag-reducer uplift, from 5.0 to 6.2 million b/d, was 24%.

The two bypass lines around PS11 point towards the second reading, but they do not prove it. Which lines those bypasses serve is the single most important unknown in this analysis.

What must be true

If both main lines lost PS11, at least one of the following must hold.

1. Pumping has been restored at PS11

Aramco could have installed replacement pump trains, temporary turbines or a parallel pumping arrangement after the 17 September image. The scale would not be small. Depending on the pressure being replaced, it is plausibly 50–90 MW of shaft power: two or three large gas turbines, or dozens of mobile units. That figure is our estimate, not a published specification.

Equipment of that size leaves a mark: pump skids or turbine packages, large pipe connections, exhaust stacks, foundations and fuel supply. A post-restart image at about 30 cm resolution can test this directly.

2. Drag reduction is working harder than at the March peak

The March uplift cannot be counted twice. Heavier dosing, lighter crude or lower viscosity could deliver more, but it would have to be performance beyond the configuration that already carried 7 million b/d, on the order of Aramco's whole previous uplift again. Field performance in a 1,200 km large-diameter system is not established by laboratory maximums.

3. The modern system no longer behaves like the 1993 line

Higher-pressure pumps, new cross-connections, uprated pipe or different operating limits could let the line keep far more flow after losing PS11. If so, those upgrades should appear in engineering records, procurement or later technical literature. That the system may have changed is a fair uncertainty, but not evidence that it did.

4. Less of the system depends on PS11 than the bypasses suggest

This is the cleanest way to reach 5.8 without new pumping. One bypass might serve a converted NGL line rather than the 48-inch, or the network might share pressure in ways public diagrams do not show.

5. The 5.8 figure was a brief rate, not a daily average

The minister spoke of the position "as of this morning" and gave no unit. A short-lived rate still cannot break pressure limits, but it can exceed a sustainable one if operators accept margins they would not hold for long, inject drag reducer faster than stocks allow, choose favourable crude or run temporary equipment without spares. Terminal tanks absorb the difference. A point reading can be accurate even if the system cannot hold it for a week. Kpler's 5.5 is consistent with that pattern.

What would settle it

Imagery can show whether 5.8 million b/d is physically plausible. It cannot measure the flow. The decisive outside check is a balance over several days:

Pipeline inflow ≈ Yanbu and Al Muajjiz crude loadings + west-coast refinery intake + change in terminal stocks

Refinery intake is the weakest term, because it cannot be observed directly; we assume 1.5–2.0 million b/d. Storage changes need radar or optical tank-level analysis.

For 6–13 October:

Red Sea crude loadings of about 3.8 million b/d or more, with stocks flat or building, would be consistent with sustained flow of 5.5–6.0 million b/d. Kpler's estimate of roughly 4 million b/d available for export is in this range. The Red Sea terminals have a nominal loading capacity of about 4.5 million b/d, but market sources cited by Engineering News-Record put their operationally tested capacity nearer 4 million.
Loadings well below about 3.5 million b/d, with stocks flat or falling, would be hard to reconcile with a sustained 5.8.
Results in between would stay indeterminate without better refinery and storage data.

Three pieces of evidence would sharpen the engineering assessment:

a georeferenced, commercial-resolution image of PS11 taken after the restart;
a line map showing which of the 56-inch, 48-inch and converted NGL lines depend on PS11, and which two the bypasses serve;
a seven-day balance of Red Sea loadings, refinery intake and storage.

Conclusion

The minister's figure is not shown to be false, and a tracker estimate now broadly supports it.

What the public record does not show is the engineering that makes it possible. If only the 56-inch line depended on Pump Station 11, Aramco's own 1993 result is consistent with today's reported flows. If both main lines did, as the two bypasses suggest, the same result points to about 4.3–4.8 million b/d, and both Kpler's 5.5 and the minister's 5.8 require something unreported: new pumping at PS11, drag reduction well beyond the March peak, a substantially upgraded system, or a rate that was briefly reached rather than sustained.

Each of those leaves evidence. An image of PS11 can confirm or rule out major new pumping, a line map can settle how much of the system depended on the station, and the next week of loadings and storage can show whether the rate held.

Until then, the precise conclusion is this: Saudi Arabia has reported the recovery, and a tracker estimate broadly supports it, but the public record does not show what engineering configuration sustains it.

Sources

Method note: The calculations are conditional sensitivity tests built from published capacity figures and the 1993 result that losing PS11 cut AY-1L to 56% of design flow. They are not a simulation of Aramco's current network, and they do not assume every line shares the same pressure limits or dependence on PS11.