{"name":"Pioneer Natural Resources Drilling Activity in Upton County, Texas","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/pioneer-natural-resources/texas/upton","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-07-04","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Pioneer Natural Resources","operatorSlug":"pioneer-natural-resources","state":"TX","county":"Upton","totalWells":3833,"producingWells":3325,"permits24mo":204,"spuds24mo":148,"ducCount":169,"topFormation":"Thirty-One Carbonate-Chert","rankInCounty":1,"firstPermitDate":"1901-01-01","lastPermitDate":"2026-07-01"}