ExxonMobil’s Stabroek Block offshore Guyana passed one billion barrels of cumulative production, with a fifth FPSO (Uaru’s Errea Wittu) due on stream by year-end; the company’s exploration chief also flagged a new, as-yet-undisclosed discovery on the block.
Published in Brief No. 4 ·
Reviewed by Georges C. Nama, Esq., licensed by the Supreme Court of Texas.
ExxonMobil and its partners have now produced more than one billion barrels of oil from the Stabroek Block offshore Guyana since first oil in December 2019, the company said on September 28, 2026. Production capacity sits above 900,000 barrels per day across four floating production vessels, and a fifth — the Errea Wittu FPSO for the Uaru development — is expected to start up by the end of 2026, adding roughly 250,000 barrels per day. Separately, ExxonMobil’s head of global exploration, John Ardill, said the venture had made a new discovery in the central part of the block; the company has not disclosed the discovery’s name, size or timeline, and has not issued a formal announcement. Stabroek remains one of the world’s most prolific recent offshore oil plays, with ExxonMobil as operator.
Guyana remains the fastest-growing major new oil province in the world, and it is largely a U.S. story: ExxonMobil operates Stabroek, and American engineering, services and financing follow. A fifth FPSO on stream by year-end pushes national output toward one million barrels per day, and any new discovery extends an already long development runway. For U.S. suppliers, contractors and investors, Guyana is where offshore growth is still compounding — and where production-sharing, local-content and fiscal terms are worth watching closely.
What it means for U.S. companies
For U.S. companies, Guyana is the rare offshore province still adding capacity at speed, with a U.S. major (ExxonMobil) as operator — a continuing pull for American drilling, subsea, engineering and financial-services providers. The billion-barrel milestone and a fifth FPSO nearing start-up signal a multi-year runway; a further discovery, once detailed, would extend it. The watch items for U.S. participants are the production-sharing and local-content terms and how new finds move from appraisal to sanction.
Related reading
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Sources: ExxonMobil ↗ · OilNOW ↗ · Kaieteur News ↗
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