{"name":"Casillas Petroleum Drilling Activity in Grant County, Oklahoma","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/casillas-petroleum/oklahoma/grant","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Casillas Petroleum","operatorSlug":"casillas-petroleum","state":"OK","county":"Grant","totalWells":129,"producingWells":38,"permits24mo":0,"spuds24mo":0,"ducCount":83,"topFormation":null,"rankInCounty":3,"firstPermitDate":"1984-02-03","lastPermitDate":"2012-02-03"}