Oil field in the context of "McKittrick Oil Field"

Oil depletion is the decline in oil production of a well, oil field, or geographic area. The Hubbert peak theory makes predictions of production rates based on prior discovery rates and anticipated production rates. Hubbert curves predict that the production curves of non-renewing resources approximate a bell curve. Thus, according to this theory, when the peak of production is passed, production rates enter an irreversible decline.

The Romashkino field (Russian: Ромашкинское нефтяное месторождение; Tatar: Ромашкино нефть чыганагы) is an oil field in Leninogorsky District, southeastern Tatarstan, Russia. It was discovered by the Soviet Government in 1944 in the village of Romashkino. Extraction began in 1948 and some 3.5 billion tonnes of oil had been extracted by July 2025. It is the largest oil field of Volga-Ural Basin. The field is operated by Tatneft.

The field covers approximately 4,200 square kilometres (1,600 sq mi). The oil deposit is lays in depth of about 1,800 metres (5,900 ft) in Kinovskiy and Pashiyskiy formations. Since its commissioning, the Romashkino field had produced over 15 billion barrels (2.4×10^ m) of oil. Statistic analysis predicted depletion at 16.5 to 17.2 billion barrels (2.62×10^ to 2.73×10^ m). However, advanced technologies allow for extraction of more oil, including water injection.

The Rumaila oil field is a super-giant oil field located in southern Iraq, approximately 50km to the south west of Basra City. Discovered in 1953 by the Basrah Petroleum Company (BPC), an associate company of the Iraq Petroleum Company (IPC), the field is estimated to contain 17 billion barrels, which accounts for 12% of Iraq's oil reserves, estimated at 143 billion barrels. Rumaila is said to be the largest oilfield ever discovered in Iraq and one of the three largest oilfields in the world.

Under Abdul-Karim Qasim, the oilfield was nationalised by the Iraqi government by Public Law No. 80 on 11 December 1961. Since then, this massive oil field has remained under Iraqi control. The assets and rights of IPC were nationalized by Saddam Hussein in 1972, and those of BPC in 1975. The dispute between Iraq and Kuwait over alleged slant-drilling in the field was one of the reasons for Iraq's invasion of Kuwait in 1990.

The Baku–Tbilisi–Ceyhan (BTC) pipeline is a 1,768 kilometres (1,099 mi) long crude oil pipeline from the Azeri–Chirag–Gunashli oil field in the Caspian Sea to the Mediterranean Sea. It connects Baku, the capital of Azerbaijan and Ceyhan, a port on the south-eastern Mediterranean coast of Turkey, via Tbilisi, the capital of Georgia. It is the second-longest oil pipeline in the former Soviet Union, after the Russian Druzhba pipeline. The first oil that was pumped from the Baku end of the pipeline reached Ceyhan on 28 May 2006.

The Burgan field is an oil field situated in the desert of southeastern Kuwait. Burgan field can also refer to the Greater Burgan—a group of three closely spaced fields, which includes, in addition to Burgan field, the much smaller Magwa and Ahmadi fields. Greater Burgan is the world's largest sandstone oil field, and the second-largest overall, after Ghawar in Saudi Arabia. The Burgan field is located on the coast of the Persian Gulf, which played a huge part in the creation of this prominent reservoir formation many million years ago.

A petroleum geologist is an earth scientist who works in the field of petroleum geology, which involves all aspects of the discovery and production of oil and gas. Petroleum geologists are usually linked to the actual discovery of oil and gas and the identification of possible new oil deposits or gas fields. It can be a very labor-intensive task involving several different fields of science and elaborate equipment. Petroleum geologists look at the structural and sedimentary aspects of the stratum/strata to identify possible oil traps or tight shale plays.

The Anglo-Persian Oil Company (APOC; Persian: شرکت نفت ایران و انگلیس) was a British company founded in 1909 following the discovery of a large oil field in Masjed Soleiman, Persia (Iran). The British government purchased 51% of the company in 1914, gaining a controlling number of shares, effectively nationalizing the company. It was the first company to extract petroleum from Iran. In 1935 APOC was renamed the Anglo-Iranian Oil Company (AIOC) when Reza Shah formally asked foreign countries to refer to Persia by its endonym Iran.

In 1954, it was renamed again to The British Petroleum Company, one of the antecedents of the modern BP public limited company. The government of Mohammad Mosaddegh nationalized the company's local infrastructure assets and gave the new company the name National Iranian Oil Company.

This list of oil fields includes some major oil fields of the past and present.

The list is incomplete; there are more than 25,000 oil and gas fields of all sizes in the world. However, 94% of known oil is concentrated in fewer than 1,500 giant and major fields. Most of the world's largest oilfields are located in the Middle East, but there are also super giant (5 billion bbls) oilfields in Brazil, Mexico, Venezuela, Kazakhstan, and Russia.

Oil megaprojects are large oil field projects.