Vaca Muerta crude displaces African suppliers at Uruguay’s La Teja refinery as cross-border energy corridor solidifies

ANCAP’s La Teja refinery historically sourced light crude from Nigeria and Angola, with shipments crossing the Atlantic in two to three weeks. The emergence of Medanito crude from Argentina’s Vaca Muerta formation as a viable alternative stems from three converging factors: increased shale oil production in the Neuquén basin, expanded export capacity at Puerto Rosales in southern Buenos Aires province, and modernized receiving infrastructure at Uruguay’s José Ignacio offshore terminal. Medanito’s low density and sulfur content align with La Teja’s processing requirements, while the maritime route from Puerto Rosales to José Ignacio shortens delivery schedules and reduces inventory holding needs.

Infrastructure investments enabled the shift. Puerto Rosales doubled its dispatch volume in late 2025, while Uruguay upgraded the José Ignacio monobuoy to handle vessels up to 150,000 tonnes. The offshore receiving system transfers crude via subsea pipeline to Terminal Este storage tanks, which feed directly into La Teja. The Otamerica offshore loading dock in Argentina now handles 20 to 25 monthly shipments. Export data shows the trajectory: from 62,800 tonnes in 2023 to 240,000 tonnes in 2025, with 2026 volumes sustaining the upward trend.

The Neuquén basin’s expanding export footprint extends beyond Uruguay. Rehabilitation of the Trasandino pipeline reactivated shipments to Chile’s ENAP refineries on the Pacific coast, diversifying outlet options for producers. Argentina’s total crude production reached 914,900 barrels per day in June 2026, up 17.1 percent year-on-year, with Vaca Muerta contributing 633,946 barrels daily and representing 70 percent of national output. Goldman Sachs identified Argentina among the four countries driving Latin American oil production growth.

The shorter supply chain provides ANCAP operational flexibility to adjust procurement based on domestic demand fluctuations, reducing exposure to international freight volatility. The commercial relationship now functions as a recurring trade route rather than opportunistic spot purchases. Argentina’s infrastructure agenda includes future floating liquefaction units to extend natural gas exports across South America without exclusive reliance on terrestrial pipeline networks, further integrating regional energy flows around Neuquén basin output.