Triple Squeeze: Ukrainian Strikes, Hormuz Blockade, and Refinery Outages Push Brent to $114

Ukrainian drone strikes slashed Russian refinery throughput to 4.69 million barrels per day in April 2026—the lowest level since December 2009—as a three-week Hormuz blockade and seasonal maintenance cycles converged to create what the IEA termed the ‘largest supply disruption in history.’

Brent crude spiked to $126.41 per barrel on April 30 before settling at $114.01, capping a volatile month in which Ukraine conducted at least 21 attacks on Russian oil infrastructure, according to Bloomberg. Nine of those strikes targeted refineries directly—the highest monthly total this year.

Sustained Campaign Degrades Strategic Assets

The Tuapse refinery—a major Rosneft-operated export hub on the Black Sea—was struck three times in 12 days between April 16 and 28, forcing the facility offline, per CNN reporting on Kpler data. The facility had already been ‘effectively offline’ since fall 2025 drone attacks; the latest strikes will delay restart timelines and constrain product exports even once operations resume, according to Sumit Ritolia, senior manager at Kpler.

On April 30, Ukrainian drones hit the Lukoil Perm Refinery’s AVT-4 processing unit and a linear production station critical to refinery operations, extending the geographic scope of the campaign beyond Black Sea targets. Russia was forced to cut crude production by 300,000-400,000 barrels per day from Q1 2026 levels as port and refinery strikes compounded operational constraints, Reuters estimated in late April.

Ukrainian President Volodymyr Zelenskyy estimated Russia lost no less than $2.3 billion in oil revenue from March strikes alone. The sustained pace—nine refinery strikes in April versus sporadic attacks in prior months—signals a shift from opportunistic targeting to campaign-level operations designed to prevent recovery.

Hormuz Closure Compounds Supply Deficit

The Strait of Hormuz has carried fewer than 30 tanker transits per day since late February, down from over 100 in normal operations. The dual blockade—Iranian mines and interdiction overlapping with U.S. naval enforcement—has effectively severed roughly 25% of global seaborne oil trade for three weeks, according to the IEA.

Global oil supply plummeted by 10.1 million barrels per day to 97 million bpd in March, while crude throughput fell by an additional 6 million bpd in April as Middle East refineries curtailed operations. OPEC+ production dropped 9.4 million bpd month-over-month. Global crude stocks fell by 85 million barrels in March despite inventory builds in China; Asian importing nations saw stocks decline by 31 million barrels, with further drawdowns expected through May.

Diesel Markets Bear the Brunt

Distillate crack spreads at New York Harbor averaged $1.42 per gallon in March—the highest monthly level since 2022 and more than double the five-year average of $0.68 per gallon, data from the U.S. Energy Information Administration showed. U.S. retail Diesel prices peaked at $5.80 per gallon in April and are forecast to average $4.80 per gallon for full-year 2026, up from $3.66 in 2025.

The tightness reflects both crude scarcity and refining bottlenecks. Roughly 2.9 million barrels per day of global refinery capacity is offline—about 2.8% of global nameplate capacity—due to sustained Russian deficits and Middle East closures. Seasonal maintenance cycles, typically concentrated in April-May, have exacerbated the squeeze as refiners in Europe and Asia delay turnarounds amid margin incentives to keep units running.

Market Psychology Shifts

Oil prices have ‘nowhere to go but up’ until permanent reopening of the Hormuz strait comes into view, according to Vandana Hari, founder of Vanda Insights. Neil Wilson, strategist at Saxo Investment Bank, noted that the market has shifted from hoping for diplomatic resolution to ‘fixating squarely on the physical scarcity and long-term threat to supply with the possible escalation of conflict now looming.’

The triple squeeze—Ukrainian strikes eliminating Russian refining capacity just as Hormuz chokes off Middle East supply and maintenance cycles constrain global throughput—has delivered demand destruction across Asia and Europe. Airlines face curtailment decisions; petrochemical feedstock costs have surged; trucking and logistics operators confront margin compression at $5+ diesel.

Forward Implications

The sustained Ukrainian drone campaign demonstrates a capability to impose cumulative damage on hardened infrastructure despite Russia’s layered air defences. Repeated strikes on Tuapse—three times in 12 days—show Ukraine operating in ‘sustained campaign mode, where compounding damage prevents recovery,’ per Al Jazeera reporting on ACLED analysis.

The combination of kinetic supply disruption and sanctions-driven export constraints has created a hard cap on Russia’s ability to fund its war effort through Energy revenues—even as global prices spike. Where four years of Western sanctions struggled to meaningfully curtail Russian oil income, the convergence of Ukrainian strikes, Hormuz closure, and global refinery constraints has achieved revenue destruction through physical removal of processing capacity.

Markets now price in persistent scarcity. Brent’s spike to $126 and subsequent volatility reflects trader uncertainty over whether physical barrels will reach market, not merely geopolitical risk premiums. With Hormuz reopening timelines uncertain, Russian refinery recovery delayed by repeated strikes, and seasonal maintenance cycles extending into June, the triple squeeze shows no near-term resolution. Diesel consumers—from freight operators to agricultural producers facing spring planting—confront a structural cost shock with limited hedging options as inventories draw down and crack spreads widen beyond historical norms.