U.S. crude production is far more concentrated than the headline suggests
The question we asked
> which regions actually account for U.S. crude production, and how concentrated is it?
What the engine found
Regional production is not evenly spread. Gulf Coast (PADD 3) accounts for 74% of total U.S. crude output on its own.
Permian and Eagle Ford together make up 41.5% of national production — two sub-regions inside one PADD driving nearly half the country's output.
What it means
A single national total hides how concentrated production actually is by region. This is a concentration finding rather than a change over time, which is why it does not need a before/after window to be useful — the engine surfaces it from one snapshot of the regional breakdown.
This is a static concentration measure, not a trend. Whether these shares are shifting over time is a separate question the same engine can answer.
“Gulf Coast alone accounts for 74% of U.S. crude output — Permian and Eagle Ford together are 41.5% of the national total.”
Check it yourself
EIA regional production data is public. Cross-check the Gulf Coast and Permian/Eagle Ford shares directly against the EIA's own regional tables.
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