Key Terms |
Definition |
Barrel |
A unit of volume equal to 42 U.S. gallons.
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Crude Oil |
A mixture of hydrocarbons that exists in liquid phase in natural underground
reservoirs and remains liquid at atmospheric pressure after passing through
surface separating facilities. Depending upon the characteristics of the crude
stream, it may also include:
Small amounts of hydrocarbons that exist in gaseous phase in natural
underground reservoirs but are liquid at atmospheric pressure after being
recovered from oil well (casinghead) gas in lease separators and are subsequently
commingled with the crude stream without being separately measured. Lease
condensate recovered as a liquid from natural gas wells in lease or field
separation facilities and later mixed into the crude stream is also included;
Small amounts of nonhydrocarbons produced with the oil, such as sulfur and
various metals;
Drip gases, and liquid hydrocarbons produced from tar sands, oil sands,
gilsonite, and oil shale.
Liquids produced at natural gas processing plants are excluded. Crude oil is refined to produce
a wide array of petroleum products, including heating oils; gasoline, diesel and jet fuels;
lubricants; asphalt; ethane, propane, and butane; and many other products used for their
energy or chemical content.
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Crude Oil, Refinery Receipts |
Receipts of domestic and foreign crude oil at a refinery. Includes all crude oil in
transit except crude oil in transit by pipeline. Foreign crude oil is reported as a
receipt only after entry through customs. Crude oil of foreign origin held in bonded
storage is excluded.
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Domestic Crude Oil |
Crude oil produced in the United States or from its "outer continental shelf" as
defined in 43 USC 1331.
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Foreign Crude Oil |
Crude oil produced outside the United States. Imported Athabasca hydrocarbons
(tar sands from Canada) are included.
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Petroleum Administration for Defense (PAD) Districts |
Geographic aggregations of the 50 States and the District of Columbia into five districts
by the Petroleum Administration for Defense in 1950. These districts were originally defined
during World War II for purposes of administering oil allocation.
Description and maps of PAD Districts and Refining Districts.
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Pipeline (Petroleum) |
Crude oil and product pipelines used to transport crude oil and petroleum products respectively,
(including interstate, intrastate, and intracompany pipelines) within the 50 States and the
District of Columbia.
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Refinery |
An installation that manufactures finished petroleum products from crude oil, unfinished oils,
natural gas liquids, other hydrocarbons, and oxygenates.
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Tanker and Barge |
Vessels that transport crude oil or petroleum products. Data are reported for movements between
PAD Districts; from a PAD District to the Panama Canal; or from the Panama Canal to a PAD District.
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