Marathon Petroleum has secured all output from two fractionators starting operations on the Gulf Coast between 2028 and 2029, each processing 150,000 barrels per day of natural gas liquids. The combined 300,000-barrel capacity targets growing Asian demand for ethane and propane as petrochemical feedstocks.
Fractionators separate mixed NGLs into ethane, propane, and butane used in plastics manufacturing and fuel blending. Marathon's full offtake agreement provides revenue certainty before construction begins on facilities costing $400-600 million each. Midstream developers typically require contracts covering 70-80% of capacity before greenlighting such projects.
The timing aligns with projected global ethylene capacity growth of 3-4% annually through 2030, concentrated in Asia. U.S. producers hold cost advantages from abundant shale gas, with domestic NGL output reaching 6.5 million barrels per day in 2024. Permian Basin and Appalachian production drove Gulf Coast fractionation capacity expansion since 2015.
These two units will add 10% to the Gulf Coast's existing 3 million barrels per day of fractionation capacity in Texas and Louisiana. The region sits near major gas processing areas and export terminals serving international markets increasingly reliant on U.S. NGL supplies.
Marathon operates a 1.9 million-barrel-per-day refining network and midstream infrastructure through its MPLX partnership. The integrated model lets the company optimize margins across gathering, processing, fractionation, and refining rather than depending solely on refining spreads.
Marathon has not disclosed financial terms or identified facility operators. The commitment signals continued confidence in NGL supply growth despite recent moderation in U.S. drilling activity, banking on sustained Asian petrochemical demand for American exports.
Sources:
1 Yahoo Finance, "MPLX LP: Why This Midstream MLP Deserves a Premium Valuation" (February 20, 2026)