History of Oil Extraction

Oil seeps were known in Iran long before the modern industry, but systematic drilling began in the early twentieth century. Commercial quantities were discovered at Masjed Soleyman in May 1908, in the southwestern foothills of the Zagros Mountains. Subsequent discoveries made Khuzestan, the southwestern province bordering Iraq and the Persian Gulf, central to the industry’s development. s1

The legal starting point preceded the successful well. The D’Arcy concession of 1901 granted an investor petroleum rights under an arrangement in which commercial risk and exploitation rights were exchanged for payments to the state. The history of extraction consequently involves two distinct questions: where oil could be produced, and who could operate the industry and receive its proceeds. s2

Nationalization in 1951 challenged the position of the Anglo-Iranian Oil Company, the British-controlled business operating the industry. Prime Minister Mohammad Mosaddeq sought to implement the legislation. Britain’s blockade and the reluctance of major companies to purchase Iranian oil sharply constrained production and exports. The confrontation concerned sovereignty and commercial power as well as revenue. s1s3

Mosaddeq’s government was overthrown in the Anglo-American-backed coup of August 1953. A new consortium agreement followed in 1954. It preserved the National Iranian Oil Company’s ownership of assets while foreign operating companies managed major production and refining operations on its behalf. Formal ownership and operational control were therefore different things. s2s3

Interpretations of responsibility for the failed negotiations differ. Parviz Mina’s account emphasizes rejected settlement opportunities; the Council on Foreign Relations account emphasizes British resistance and the shift toward covert intervention. Neither perspective should be mistaken for the unmediated voice of everyone involved. s2s3

New agreements and discoveries supported expansion during the following decades. Iranica’s historical account places the production peak in 1974. Revolution, changing policy, sanctions, and the Iran–Iraq War subsequently reduced extraction. After the war, rehabilitation and development efforts included buyback arrangements intended to attract finance and technical assistance. s1

Later constraints were different from geological exhaustion alone. The U.S. Energy Information Administration’s October 2024 assessment identifies sanctions, underinvestment, and the difficulty of maintaining mature fields as important limitations. It also distinguishes awarded contracts and intended capacity from completed production. A development announcement is evidence of a plan, not proof that its target has been achieved. s4

The International Energy Agency series below measures annual average crude-oil production, not exports, reserves, refining output, or total petroleum liquids. It shows a decline after 2017, a low point in 2020, and recovery through 2024, still below the 2017 level. Production alone cannot establish government income: prices, domestic use, export volumes, and selling terms also matter. s5

This is a historical series from the inspected 2025 statistical supplement. The IEA confirms that a 2026 edition was published, but its annual production table was not inspected for this page. Consequently, these observations are not presented as the latest available vintage, and the article requires a data update before publication as a current account. s5s6

Iran · gregorian