Well rankings

Cross-sections of 4,166,704 catalogued wells — 1,202,206 active, 164,816 documented orphans, 101,832 operators.

Dataset updated October 2026 . Derived from public data sources.

Largest operators

Who operates the most U.S. oil & gas wells — national portfolios, active vs. plugged mix.

The deepest catalogued wellbores in America, ranked by published total depth.

Documented orphaned wells by state and county — the $4.7B federal plugging story.