{"name":"Union Oil Company Of California Drilling Activity in Van Zandt County, Texas","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/union-oil-company-of-california/texas/van-zandt","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":"TX","county":"Van Zandt","totalWells":169,"producingWells":149,"permits24mo":0,"spuds24mo":0,"ducCount":3,"topFormation":"Gilmer Lime","rankInCounty":2,"firstPermitDate":"1968-02-26","lastPermitDate":"2008-06-05"}