We added the Avalon, Barnett, Dean, and Woodford plays within the Permian Basin to our estimates by formation for Permian tight oil and shale natural gas production in our March 2026 Short-Term Energy Outlook (STEO). The Permian formations already included the Spraberry, Bone Spring, and Wolfcamp plays. EIA periodically reviews and updates our play designations according to the latest interpretation of geologic information in identifying crude oil and natural gas production from tight oil and shale formations. At the same time, we removed the Delaware and Yeso-Glorieta plays. These modifications are isolated to the Permian formations, resulting in a net increase for tight oil production by 0.2 million barrels per day (b/d) and shale gas production by 0.8 billion cubic feet per day (Bcf/d) for 2025, compared with previous estimates.

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