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Oil and petroleum products explained Where our oil comes from

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The United States is one of the largest crude oil producers

About 100 countries produce crude oil. The United States was the top crude oil producer in 2018 and 2019. U.S. oil refineries obtain crude oil produced in the United States and in other countries. Different types of companies supply crude oil to the world market.

Where U.S. crude oil is produced

Crude oil is produced in 32 U.S. states and in U.S. coastal waters. In 2019, about 69% of total U.S. crude oil production came from five states.

The top five crude oil-producing states and their percentage shares of total U.S. crude oil production in 2019 were Texas 41.4% North Dakota 11.6% New Mexico 7.4% Oklahoma 4.7% Colorado 4.2%

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In 2019, about 15.5% of U.S. crude oil was produced from wells located offshore in the federally administered waters of the Gulf of Mexico.

Although total U.S. crude oil production generally declined between 1985 and 2008, annual production increased nearly each year from 2009 through 2019, reaching the highest amount on record in 2019. More cost-effective drilling technology helped to boost production, especially in Texas, North Dakota, Oklahoma, New Mexico, and Colorado.

Many countries produce crude oil

About 100 countries produce crude oil. However, in 2019, five countries accounted for about half of the world's total crude oil production.

The top five crude oil producers and their percentage shares of world crude oil production in 2019 were United States 15% Russia 13% Saudi Arabia 12% Iraq 6% Canada 5%

Different types of oil companies supply crude oil

The world oil market is complex. Governments and private companies play various roles in moving crude oil from producers to consumers.

In the United States, companies produce crude oil on private and public land and offshore waters. Most of these companies are independent producers , and they usually operate only in the United States. The other companies, often referred to as major oil companies , may have hundreds or thousands of employees and operate in many countries. Examples of major U.S. oil companies are Chevron and ExxonMobil.

Three types of companies supply crude oil to the global oil market. Each type of company has different operational strategies and production-related goals.

International oil companies

International oil companies (IOCs), which include ExxonMobil, BP, and Royal Dutch Shell, are entirely investor owned and are primarily interested in increasing value for their shareholders. As a result, IOCs tend to make investment decisions based on economic factors. IOCs typically move quickly to develop and produce the oil resources available to them and sell their output in the global market. Although these producers must follow the laws of the countries in which they produce oil, all of their decisions are ultimately made in the interest of the company and its shareholders, not in the interest of a government.

National oil companies

National oil companies (NOCs) operate as extensions of a government or a government agency, and they include companies such as Saudi Aramco (Saudi Arabia), Pemex (Mexico), the China National Petroleum Corporation (CNPC), and Petroleos de Venezuela S.A. (PdVSA). NOCs financially support government programs and sometimes provide strategic support. NOCs often provide fuels to their domestic consumers at a lower price than the fuels they provide to the international market. They do not always have the incentive, means, or intention to develop their reserves at the same pace as investor-owned international oil companies. Because of the diverse objectives of their supporting governments, NOCs pursue goals that are not necessarily market oriented. The goals of NOCs often include employing citizens, furthering a government's domestic or foreign policies, generating long-term revenue to pay for government programs, and supplying inexpensive domestic energy. All NOCs that belong to members of the Organization of the Petroleum Exporting Countries (OPEC) fall into this category.

NOCs with strategic and operational autonomy

The NOCs in this category function as corporate entities and do not operate as extensions of their countries' governments. This category includes Petrobras (Brazil) and Statoil (Norway). These companies often balance profit-oriented concerns and the objectives of their countries with the development of their corporate strategies. Although these companies are driven by commercial concerns, they may also take into account their nations' goals when making investment or other strategic decisions.

OPEC members and Persian Gulf countries have a large share of world oil supplies

The Organization of the Petroleum Exporting Countries (OPEC) is a group that includes some of the world's most oil-rich countries. Together, the OPEC members at the beginning of 2019 held about 72% of the world's total proved crude oil reserves, and the OPEC members in 2019 accounted for about 39% of total world crude oil production. Each OPEC country has at least one NOC, but most also allow IOCs to operate within their borders. In 2019, the seven countries in the Persian Gulf produced about 31% of total world crude oil, and they held about 48% of world proved crude oil reserves.

did you know


OPEC and Persian Gulf countries are not the same.

The Organization of the Petroleum Exporting Countries (OPEC) was organized in 1960 for the purpose of negotiating with oil companies on matters of oil production, prices, and future concession rights. Of the 13 OPEC member countries at beginning of 2020, only 5 of them were Persian Gulf countries. The OPEC members in bold in the table below are also in the Persian Gulf.

OPEC members Persian Gulf countries Algeria Bahrain Angola Iran Congo Iraq Equatorial Guinea Kuwait Gabon Qatar Iran Saudi Arabia Iraq United Arab Emirates Kuwait Libya Nigeria Saudi Arabia United Arab Emirates Venezuela

Last updated: October 26, 2020

Also in Oil and petroleum products explained

Oil and petroleum products Refining crude oil Where our oil comes from Imports and exports Offshore oil and gas Use of oil Prices and outlook Oil and the environment

Learn more

Crude Oil Production (U.S.) Production of Crude Oil, including Lease Condensate (international data) United States Geological Survey-Resources Program Maps of shale gas and oil plays Articles on oil production

Also on Energy Explained

Where our oil comes from: In depth Offshore oil and gas Refining crude oil Energy use for transportation

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How much of the oil produced in the United States is consumed in the United States? How much oil consumed by the United States comes from foreign countries? Does the world have enough oil worldwide to meet our future needs? About EIA Open Data Press Room Careers Contact Us U.S. Energy Information Administration
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