Tight oil

Tight oil (also known as shale oil or light tight oil, abbreviated LTO) is a petroleum play that consists of light crude oil contained in petroleum-bearing formations of low permeability, often shale or tight sandstone. 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. It should not be confused with oil shale, which is shale rich in kerogen.

News

 * Oil & Gas, IHS: World’s tight oil resources hold large potential, published on 18 September 2013.
 * Reuters, Tight oil potential outside North America is huge: study, published on 17 September 2013.
 * OIES, The US Tight Oil Revolution in a Global Perspective, September 2013.