{"name":"Union Oil Company Of California Drilling Activity in San Joaquin County, California","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/union-oil-company-of-california/california/san-joaquin","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Union Oil Company Of California","operatorSlug":"union-oil-company-of-california","state":"CA","county":"San Joaquin","totalWells":32,"producingWells":3,"permits24mo":0,"spuds24mo":0,"ducCount":29,"topFormation":null,"rankInCounty":7,"firstPermitDate":"1931-12-14","lastPermitDate":"1992-05-13"}