US crude exports surged to a record 5.6 million barrels per day in May, fueled by Strategic Petroleum Reserve releases and elevated Gulf of Mexico output, though a slowdown is forecast in June, Kpler strategists said in a Monday note.
The record export level dwarfs a shifting barrel composition, with flows increasingly reliant on non-traditional sources rather than the light sweet shale crude that typically dominates US seaborne exports.
Matt Smith, director of commodity research at Kpler, said that about one-third of the 58 million barrels released from the SPR since late March have been exported, with Europe emerging as the primary destination.
Smith said that the SPR releases span five crude grades sourced from multiple storage caverns, offering refiners a broader slate of medium- and sour-grade barrels than US shale production.
Simultaneously, Kpler said that Gulf of Mexico crude exports have surged, with over 28 million barrels shipped over the past two months, three times the typical pace. The data analytics firm said the volumes have been split relatively evenly between Europe and Asia.
A redistribution effect across the US Gulf Coast infrastructure has reinforced the export surge. SPR barrels have been increasingly processed by domestic refiners, effectively displacing some offshore production and freeing up Gulf of Mexico crude for export markets.
Traditionally, Corpus Christi and Houston account for about 85% of US crude exports, largely driven by light sweet shale barrels. However, their combined share fell to about 70% in May, despite record total exports, highlighting both infrastructure constraints and the changing barrel mix.
Corpus Christi continues to face pipeline bottlenecks, while Houston remains constrained by dock capacity, limiting incremental export growth from the country's two largest crude export hubs.
Kpler said instead, exports from smaller or less conventional ports jumped to 1.6 million b/d in May, supported by SPR-linked flows and stronger Gulf of Mexico output.
Smith said that the growth in exports outside the main Gulf Coast hubs confirms how alternative flows have temporarily reshaped US crude logistics. He said that infrastructure constraints remain binding even amid high production and inventory drawdowns.
The surge in outbound shipments has coincided with a sharp tightening in US crude balances. Kpler said that US crude inventories have dropped by 86 million barrels since late March, including a 28 million barrel draw over the past two weeks.
Stockpiles at Cushing, Oklahoma, a key pricing hub for WTI, are now approaching operational lows. Kpler said that recent estimates indicate a further 1.4-million-barrel draw in the latest week, leaving inventories only a few million barrels above minimum operating thresholds.
The tightening at Cushing has contributed to firmer prompt price spreads and supported stronger export economics even as global crude balances remain mixed.