{"name":"Magnolia Petroleum Company Drilling Activity in Jefferson County, Illinois","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/magnolia-petroleum-company/illinois/jefferson-il","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Magnolia Petroleum Company","operatorSlug":"magnolia-petroleum-company","state":"IL","county":"Jefferson","totalWells":127,"producingWells":0,"permits24mo":0,"spuds24mo":0,"ducCount":0,"topFormation":null,"rankInCounty":2,"firstPermitDate":"1939-12-04","lastPermitDate":"2016-08-25"}