ExxonMobil's Uaru FPSO Sails for Guyana With Q4 2026 First Oil on Schedule
The fifth Stabroek vessel brings 250,000 barrels per day of new capacity to market as the Iran conflict reshapes Atlantic Basin crude demand.
ExxonMobil's Uaru floating production, storage, and offloading vessel has set sail for Guyana's Stabroek block, with the operator confirming a fourth-quarter 2026 production startup that would deliver 250,000 barrels per day of new crude capacity into a market contending with prolonged Middle East supply disruption.4
South American producers have been direct beneficiaries of that disruption. The U.S.-Iran conflict has created sustained uncertainty over Strait of Hormuz flows, through which roughly a fifth of world oil and natural gas supply transits, generating strong demand for Atlantic Basin alternatives. ICE Brent crude front-month was trading at $83.70 a barrel on Monday (2026-08-03), a price environment that makes Guyana's next tranche of barrels commercially uncomplicated.4
Guyana's emergence as an exporter has been unusually rapid. The country went from first commercial discovery to first oil in roughly four years, cementing its place among South America's leading crude producers.2 That pace reflects both the quality of the Stabroek resource and ExxonMobil's development cadence, which has now extended to five FPSO deployments on a block that began as frontier acreage.
Uaru is the fifth unit in that sequence. Its departure marks the project's transition from construction and commissioning into active delivery, with the operator targeting first barrels before year-end.
At 250,000 bpd of nameplate capacity, Uaru is a significant non-OPEC addition. But the timing cuts both ways. New supply arriving while Hormuz uncertainty is supporting Brent introduces a clear downside scenario: if the Iran conflict eases before Uaru reaches plateau, the price environment those barrels sell into changes materially.4
The broader South American production picture is already bullish on volume. Brazil's Petrobras has been running offshore platforms at Buzios and other deepwater fields above their designed capacities, pushing output to record highs as Gulf supply tightens, Rigzone reported.3 Guyana is moving in the same direction with Uaru, though a Q4 2026 startup means the production curve begins months after Petrobras's current records.
ExxonMobil reported upstream earnings of $5.7 billion in the first quarter of 2026 (January-March 2026), against $6.8 billion in the same quarter of 2025, with the Energy Products segment recording a $1.3 billion loss driven by derivative mark-to-market impacts and Middle East supply disruptions.1 New Stabroek barrels help rebuild the upstream line, with the contribution shaped by how quickly Uaru ramps through commissioning toward plateau.
The nameplate figure of 250,000 bpd is a ceiling, not a starting rate. FPSO commissioning in deepwater Guyana has involved staged ramp-ups as wells connect and processing systems are proven out.
What Guyana's fifth FPSO sells into depends less on the project schedule, which looks intact, than on whether the Hormuz situation has resolved by the time first oil flows. A prolonged Iran conflict sustains the Atlantic Basin premium and strengthens Guyanese export values. A ceasefire or normalized Strait access before year-end compresses that advantage. The departure of the Uaru vessel anchors the supply-side calendar; the price it meets in Q4 is an open contract with the geopolitics of the Gulf.4,2