{"name":"Castle Minerals Drilling Activity in Solano County, California","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/castle-minerals/california/solano","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Castle Minerals","operatorSlug":"castle-minerals","state":"CA","county":"Solano","totalWells":40,"producingWells":18,"permits24mo":0,"spuds24mo":0,"ducCount":17,"topFormation":null,"rankInCounty":7,"firstPermitDate":"1996-12-11","lastPermitDate":"2018-04-27"}