{"name":"Marathon Oil Company Drilling Activity in Atascosa County, Texas","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/marathon-oil-company/texas/atascosa","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-07-04","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Marathon Oil Company","operatorSlug":"marathon-oil-company","state":"TX","county":"Atascosa","totalWells":598,"producingWells":501,"permits24mo":42,"spuds24mo":33,"ducCount":18,"topFormation":"Austin Chalk","rankInCounty":1,"firstPermitDate":"2010-09-17","lastPermitDate":"2026-05-29"}