Tight oil (also known as shale oil, shale-hosted oil or light tight oil, abbreviated LTO) is light crude oil contained in unconventional petroleum-bearing formations of low permeability, often shale or tight sandstone.[1] Economic production from tight oil formations requires the same hydraulic fracturing and often uses the same horizontal well technology used in the production of shale gas. While sometimes called "shale oil", tight oil should not be confused with oil shale (shale rich in kerogen) or shale oil (oil produced from oil shales).[2][3][4] Therefore, the International Energy Agency recommends using the term "light tight oil" for oil produced from shales or other very low permeability formations, while the World Energy Resources 2013 report by the World Energy Council uses the terms "tight oil" and "shale-hosted oil".[3][5]
Shown are conceptual illustrations of types of oil and gas wells. A vertical well is producing from a conventional oil and gas deposit (right). Also shown are wells producing from unconventional formations: a vertical coalbed methane well (second from right); a horizontal well producing from a shale formation (center); and a well producing from a tight sand formation (left).
In May 2013 the International Energy Agency in its Medium-Term Oil Market Report (MTOMR) said that the North American oil production surge led by unconventional oils - US light tight oil (LTO) and Canadian oil sands - had produced a global supply shock that would reshape the way oil is transported, stored, refined and marketed.[6]
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Mills, Robin M. (2008). The myth of the oil crisis: overcoming the challenges of depletion, geopolitics, and global warming. Greenwood Publishing Group. pp. 158–159. ISBN 978-0-313-36498-3.
^IEA (29 May 2012). Golden Rules for a Golden Age of Gas. World Energy Outlook Special Report on Unconventional Gas(PDF). OECD. p. 21.
^ abIEA (2013). World Energy Outlook 2013. OECD. p. 424. ISBN 978-92-64-20130-9.
^
Reinsalu, Enno; Aarna, Indrek (2015). "About technical terms of oil shale and shale oil" (PDF). Oil Shale. A Scientific-Technical Journal. 32 (4): 291–292. doi:10.3176/oil.2015.4.01. ISSN 0208-189X. Retrieved 2016-01-16.
^World Energy Resources 2013 Survey(PDF). World Energy Council. 2013. p. 2.46. ISBN 9780946121298.
^"Supply shock from North American oil rippling through global markets", IEA, International Energy Agency, 14 May 2013, retrieved 28 December 2013
Tightoil (also known as shale oil, shale-hosted oil or light tightoil, abbreviated LTO) is light crude oil contained in unconventional petroleum-bearing...
Additionally, tightoil is also commonly referred to as "shale oil" due to the oil often being in shale deposits. Due to this nickname, tightoil is often...
"light tightoil" and World Energy Resources 2013 report by the World Energy Council uses the term "tightoil" for crude oil in oil-bearing shales. Oil shale...
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probable and possible reserves. Significant reserves of unconventional tightoil such as contained in the Bazhenov Formation are believed to exist in western...
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on spending", has contributed to "tight" oil inventories globally. On 18 January 2022, as the price of Brent crude oil reached its highest since 2014—$88...
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priced in other currencies, including euros. The unconventional tightoil (shale oil) boom in the USA starting in the early 2000s through 2010s (as well...
An oil well is a drillhole boring in Earth that is designed to bring petroleum oil hydrocarbons to the surface. Usually some natural gas is released as...
largest oil source rock) the formation is believed to contain substantial reserves of unconventional liquid hydrocarbons in form of tightoil and solid...
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the oil When the reservoir rocks are "tight", as in shale, oil generally cannot flow through, but when they are permeable, as in sandstone, oil flows...
the economy of France. In 1917, France effectively exhausted its supply of oil, and had to be rescued by the United States. After the war, the French government...
the fractures close. Unconventional (oil & gas) reservoirs are accumulations where oil and gas phases are tightly bound to the rock fabric by strong capillary...
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other oil-exporting nations have attended many OPEC meetings as observers, as an informal mechanism for coordinating policies. The oil market was tight in...
unconventional US and Canadian tightoil (shale oil) production reached critical volumes, geopolitical rivalries among oil-producing nations, falling demand...
oil and gas wells, over one million of those within the U.S. Such treatment is generally necessary to achieve adequate flow rates in shale gas, tight...
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