Shale oil is an oil distilled from shales and used as fuel
crude oil
Basestock is refined petroleum oil with no additives.
The British Petroleum(BP) who are responsible for the oil spill but they are still the biggest company regarding the oil spills.
The largest petroleum company in the world is the Saudi Arabian Oil Company, not Shell, as the original answer stated. The top 10 petroleum companies in the world are as follows according to petrostrategies.org (http://www.petrostrategies.org/Links/Worlds_Largest_Oil_and_Gas_Companies_Sites.htm):Saudi Arabian Oil Company (Saudi Arabia)National Iranian Oil Company (Iran)Qatar General Petroleum Corporation (Qatar)Iraq National Oil Company (Iraq)Petroleos de Venezuela.S.A. (Venezuela)Abu Dhabi National Oil Company (UAE)Kuwait Petroleum Corporation (Kuwait)Nigerian National Petroleum Corporation (Nigeria)National Oil Company (Libya)Sonatrach (Algeria)The largest petroleum company in the United States is Exxon/Mobile, which ranks seventeenth in the world.Seems to be a pretty up to date list of Buyers, Sellers & Refiners below :Abu Dhabi National Oil CompanyBHP Billiton, AustraliaBP, United KingdomExxon MobilChevronConocoPhillipsCitgo, VenezuelaGazprom, Russia (Largest Per Barrell Refining in Russia)Global Energy Swiss AG, ZUG, SwizterlandGulf Oil, LuxembourgIraq National Oil CompanyKuwait Gulf Oil Company, KuwaitLocstein Petroleum Commodities, Switzerland (Reported Multi Billion Dollar Buying Capabilities)LUKoil, RussiaNippon Oil, JapanOman Oil Company (OOC), OmanPetrobrasPetrochina, China (Largest globally)Petrolos De VenezuelaPETRONAS, MalaysiaQatar Petroleum, QatarQuestar, United States of AmericaReliance Industries Limited, IndiaRepsol YPF, Spain ( Largest Spanish End User )Rosneft, Russia (Second Largest in Russia )Royal Dutch Shell, NetherlandsSasol, South AfricaSaudi Aramco, Saudi Arabia (the largest in the world)Shell Canada, Canada (subsidiary of Royal Dutch Shell)Shell Oil Company, United States of America (subsidiary of Royal Dutch ShellState Oil Company of Azerbaijan, SOCAR AzerbaijanSonatrachTotal, France
Yes. According to the US government's official energy statistics, 40% of Murphy Oil's 2007 imports came from Persian Gulf countries: http://www.eia.doe.gov/pub/oil_gas/petroleum/data_publications/company_level_imports/current/summary2007.html No. The above answer is outdated. For the year 2011 (January - December 2011) Murphy Oil did not import any crude oil from Persian Gulf countries. Web verification: http://www.eia.gov/petroleum/imports/companylevel/summary.cfm
Boyd Guthrie has written: 'Studies of certain properties of oil shale and shale oil' -- subject(s): Oil-shales, Petroleum
James H. Gary has written: 'Petroleum refining' -- subject(s): Petroleum, Refining 'Eleventh Oil Shale Symposium Proceedings' 'Fourteenth Oil Shale Symposium Proceedings'
Lester W. Schramm has written: 'U.S. shale oil forecasts (1985-1995)' -- subject(s): Shale oils, Petroleum mining, Petroleum industry and trade
Petroleum is in a liquid form. It is retrieved by drilling into the earth and then pumping it out. Oil rigs and derricks. Various means of obtaining petroleum from tar sands and shale deposits are being investigated. Tars sands are not expected to be "mined", but treated in situ to generate liquid / gaseous petroleum. Oil shale may require mining. Neither of these is currently economically viable.
There are two possibilities here: crude oil or natural gas. It's possible that oil shale and tar sands could be thought of as unrefined petroleum sources as well.
Oil shale and tar sands
Oil rich Mississippian!
crude oil
Petroleum
Petroleum
R. J Lovell has written: 'Control of sulfur emissions from oil shale retorts' -- subject(s): Shale oils, Petroleum, Sulfur content
H. W. Hoots has written: 'Oil shale in a producing oil field in California' -- subject(s): Petroleum, Oil-shales, Geology