Two exploratory shale wells drilled this summer in the United Arab Emirates each produced more than 25,000 barrels of oil in their first 30 days, matching or exceeding performance from America's most productive tight oil fields, according to a new analysis published by Wood Mackenzie. The results from the Shilaif Formation suggest the UAE could become only the third location outside North America to achieve large-scale unconventional oil production, joining Argentina's Vaca Muerta and Saudi Arabia's Jafurah. The findings mark a critical test of whether shale drilling techniques that transformed US energy markets over the past decade can be replicated internationally.
The two wells, operated by EOG Resources on a 900,000-acre concession granted in May 2025, were drilled with one-mile lateral sections—half the length typical in US shale basins like the Permian and Eagle Ford. On a per-foot basis, the UAE wells clearly outperform, indicating strong reservoir quality in the Upper Cretaceous Shilaif Formation, which holds up to 22 billion barrels of technically recoverable unconventional oil according to state-owned ADNOC's earlier estimates. Both wells are currently flowing naturally before switching to artificial lift. The drilling used locally available equipment and services rather than specialized unconventional technology, suggesting room for efficiency gains. Elsewhere in the formation, PETRONAS and a consortium of Bharat Petroleum and Indian Oil are currently drilling wells on adjacent blocks.
Wood Mackenzie upstream experts Rob Clarke and Josh Dixon praised three factors behind the strong performance: exceptional well productivity comparable to America's best liquids plays, the UAE's use of concession agreements with tax and royalty terms instead of production-sharing contracts, and significant potential for cost reductions as higher-spec equipment and longer laterals are deployed. The analysts noted that EOG Resources has a track record of rapidly testing new international unconventional plays, moving at similar speeds in Oman in 2020, Indonesia in 2024, and Bahrain in 2025. They cautioned that "it's still very early days, and many more wells are required to delineate the play and establish high confidence in EURs," since both initial wells were drilled in the same area and landing zone.
The successful wells could help the UAE stretch oil production capacity beyond its 5 million barrels per day target, according to the report. The country has committed $145 billion in real 2026 dollars to domestic upstream investment through 2030, aiming to expand capacity from under 4 million b/d in 2020 to 5 million b/d by 2027; ADNOC reported capacity reached 4.85 million b/d in 2024. The UAE departed OPEC in 2026 and no longer faces production quotas. Wood Mackenzie notes that plans to expand oil export pipelines and reduce reliance on the Strait of Hormuz would help reduce risks for future Shilaif development. The report emphasizes that long-term decline rates, well spacing, and reservoir variability will ultimately determine whether the play achieves commercial scale, but the early performance positions the UAE as a serious contender in the global race to replicate America's shale revolution.