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Vertical axis in chart corresponds to 000s of bbls of oil equivalent per day
Oil - fossil oil from on and offshore reservoirs, including tight sands/shales; and liquids extracted from gas
Full number breakdowns are available in the Datafiles area of this site
Vertical axis in chart corresponds to 000s of bbls of oil equivalent per day
Oil - manufactured oil processed from coal, gas, shale, biomass and as gains in refineries
Full number breakdowns are available in the Datafiles area of this site
Fossil Oils
1. Field Oils - are defined as hydrocarbon liquids that have been, or will be, extracted, naturally or with artificial lift, through wells from an oil, wet gas, or oil and gas field made up of one or more porous and permeable reservoirs. The oils, including condensates, can exist naturally as a liquid at the wellhead at surface temperatures and pressures. They may also be called conventional oils.
2. Natural Gas Liquids (NGLs) - are defined as hydrocarbon liquids comprising light oils or condensates that have been, or will be, recovered in a processing plant from associated gases or free gases that have or will be extracted from a field. Most NGLs are stable at normal temperatures but the NGLs that are synthesised (propane and butane), called Liquefied Petroleum Gases (LPGs), need pressurised containers for storage.
3. Shale/Tight Oils (STOs) - are defined as hydrocarbon liquids that have been, or will be, extracted through wells, naturally or with artificial lift, from tight (shales, as well as sandstones or carbonates), non-field, dispersed reservoirs before or after underground artificial fracturing. They should not be confused with Mined Shale Oils (see below).
4. Extra-Heavy Oils (from Oil Sands) - are defined as hydrocarbon liquids including bitumens that have been, or will be, extracted from shallow depth oil sands (also known as tar sands) through wells (usually with steam), or by mining. They may be converted to syncrude by chemical processes, making them more convenient to transport and burn.
Vertical axis in chart corresponds to 000s of bbls of oil equivalent per day
Oil - fossil oil produced from onshore reservoirs, including tight sands/shales; and liquids extracted from gas
Full number breakdowns are available in the Datafiles area of this site
Vertical axis in chart corresponds to 000s of bbls of oil equivalent per day
Oil - fossil oil produced from offshore reservoirs at selected water depth intervals; and liquids extracted from gas
Full number breakdowns are available in the Datafiles area of this site
Manufactured Oils
5. Mined Shale Oils - are defined as hydrocarbon liquids that have been, or will be, made after heating and processing shale rock (retorting), that has been extracted from the earth by mining, in a surface industrial plant.
6. Gas-To-Liquids (GTLs) - are defined as hydrocarbon liquids that have been, or will be, made in a refinery by converting natural gaseous hydrocarbons into longer-chain gasoline or diesel fuel via direct conversion or via syngas as an intermediate.
7. Coal-To-Liquids (CTLs) - are defined as hydrocarbon liquids that have been, or will be, made by coal liquefaction (mainly using the Fischer-Tropsch process). Coal is gasified to make syngas and catalysts then convert the syngas into light hydrocarbons which are processed into gasoline and diesel.
8. Biomass-To-Liquids (BTLs) - are defined as hydrocarbon liquids that have been, or will be, made from plant materials rather than petroleum products. Biodiesel BTLs are made when plant oils are combined with alcohol in the presence of a catalyst. Ethanol BTLs are made during sugar fermentation, by yeast, of plants, including cellusosic ethanol made directly from woody biomass.
9. Gains (Refinery) - are defined as liquid hydrocarbons that have been, or will be, created during refining. They represent the natural increase in volume of refined products compared to an input volume of crude and are not subdivided by country in the analyses.
Produced Oils
Production (Onshore) - numbers include oils from onshore wells (including those drilled within lakes, swamps and on piers), regardless of subsurface location. Oils from oil sands and manufactured oils are assumed to be of onshore origin (although gas feedstocks may sometimes originate from offshore locations).
Production (Offshore, split by water depth) - numbers include oils from offshore wells (including those drilled from fixed platforms and artificial islands unconnected to the mainland). ‘Very shallow waters’ are defined as output from reservoirs down to 100m, ‘medium shallow waters’ from >100 to 500m, ‘medium deep waters’ from >500 to 1000m, ‘very deep waters’ from >1000 to 2000m, and ‘ultra deep waters’ from > 2000m.
Types
There are 9 oil types split onshore and offshore by water depth and other categories.