Arabian American Oil Company

Arabian American Oil Company (Aramco; predecessor established 1933; name used 1944 - 1988) was an American-owned petroleum exploration and production company operating in Saudi Arabia, headquartered in Dhahran from 1952, whose survey departments made substantial contributions to the geographic and geological mapping of the Arabian Peninsula during the mid-20th century. Its origins lay in the petroleum concession granted to Standard Oil Company of California in 1933 and administered through its subsidiary, California Arabian Standard Oil Company. Commercial oil production began at Dammam No. 7 in 1938, and the company adopted the Arabian American Oil Company name in 1944. Standard Oil Company of New Jersey and Socony-Vacuum acquired interests in 1948, broadening its American ownership; its headquarters moved from New York to Dhahran in 1952. Cartographic work developed alongside geological exploration, combining ground reconnaissance, astronomical observations, triangulation, leveling, and aerial photography. Beginning in 1949, aerial mapping supplied the photographic foundation for increasingly systematic geographic coverage, while company surveyors established horizontal and vertical control. Aramco's Arabian Affairs Division also evaluated place names, consulting Saudi informants and working toward consistent Arabic and English nomenclature. In the mid-1950s, Aramco joined the United States Geological Survey in a cooperative mapping program sponsored by the Saudi government and the United States Department of State. The program provided for 21 quadrangles at 1:500,000, with separate geographic and geological versions and bilingual nomenclature. Aramco assumed responsibility for compiling the sedimentary regions, while the Geological Survey principally covered the western Arabian Shield. Geographic sheets appeared from 1956 to 1962 and geological sheets from 1956 to early 1964; the collaboration also produced a preliminary peninsula-wide geographic map in 1958, a revised edition in 1963, and the Geologic Map of the Arabian Peninsula at 1:2,000,000 in 1963. These publications made extensive company exploration data available for scientific and economic use beyond petroleum operations. Saudi government participation in Aramco began in 1973 and reached complete ownership in 1980. In 1988, the newly established Saudi Arabian Oil Company, known as Saudi Aramco, succeeded to Aramco's responsibilities.