N'afọ 1911, gọọmentị etiti mebiri Standard Oil n'ime ọtụtụ iberibe n'okpuru Sherman Antitrust Act. Otu n'ime iberibe ndị ahụ, Standard Oil Co. (California), gara n'ihu ịghọ Chevron. Ọ ghọrọ akụkụ nke "Ụmụnne Nwanyị Asaa", nke na-achịkwa ụlọ ọrụ mmanụ ụwa na mmalite narị afọ nke 20. N'afọ 1926, ụlọ ọrụ ahụ gbanwere aha ya na Standard Oil Co. nke California (SOCAL). Site na nkwekọrịta nke mmebi nke Standard Oil, na mbụ Standard nke California nwere ike iji aha Standard naanị n'ime mpaghara ala ala ya nke Pacific, tinyere Nevada na Arizona; na mpụga nke mpaghara ahụ, ọ ga-eji aha ọzọ. Taa Chevron bụ onye nwe akara ahịa Standard Oil na steeti 16 na ọdịda anyanwụ na ndịda anyanwụ ọwụwa anyanwụ. Iji jigide ikike nke US. Iji nọgide na-arụ ọrụ, otu n'ime ndị ahụ, Standard Oil Co. (California), gara n'ihu ịghọ Chevron.
wepụrụ ọtụtụ n'ime ụlọ ọrụ ndị na-arụ ọrụ nke Gulf, ma ree ụfọdụ ọdụ ụgbọ mmiri Gulf na ebe a na-eme ka mmiri dị na ọwụwa anyanwụ United States