Oklahoma

==== Oil, gas, and coal ====
As a whole, the oil energy industry contributes $35 billion to Oklahoma's gross domestic product (GDP), and employees of the state's oil-related companies earn an average of twice the state's typical yearly income.<ref name="oerb2008" /> In 2009, the state had 83,700 commercial oil wells churning {{convert|65.374|Moilbbl|m3}} of crude oil.<ref name="okcorpcommish">{{cite web|url=http://www.occeweb.com/og/2010og_report.pdf |publisher=Oklahoma Corporation Commission |title= 2009 Report on Oil and Natural Gas Activity within the State of Oklahoma |year=2009 |access-date=October 22, 2011}}</ref> A tabulated 8.5% of the nation's natural gas supply is held in Oklahoma, with {{convert|1.673|Tcuft|km3}} being produced in 2009.<ref name="okcorpcommish" />

The Oklahoma Stack Play is a geographic referenced area in the Anadarko Basin. The oil field "Sooner Trend", Anadarko basin and the counties of Kingfisher and Canadian make up the basis for the "Oklahoma STACK". Other Plays such as the Eagle Ford are geological rather than geographical.<ref>{{cite web|url=http://www.shaleexperts.com/plays/stack-scoop/Overview?menu|title=STACK & SCOOP Overview—Maps—Geology—Counties|website=www.shaleexperts.com}}</ref>

According to ''[[Forbes]]'' magazine, Oklahoma City-based [[Devon Energy|Devon Energy Corporation]], [[Chesapeake Energy|Chesapeake Energy Corporation]], and [[SandRidge Energy|SandRidge Energy Corporation]] are the largest private oil-related companies in the nation,<ref name="OK Energy 5">{{cite web |date=December 2, 2005|url=http://www.okcommerce.gov/index.php?option=content&task=view&id=657&Itemid=286| title= Three of America's Largest Private Companies Call Oklahoma Home| publisher=Oklahoma Department of Commerce| access-date=August 1, 2007}}</ref> and all Oklahoma's Fortune 500 companies are energy-related.<ref name="Fortune 500" /> Tulsa's [[ONEOK]] and [[Williams Companies]] are the state's largest and second-largest companies respectively, also ranking as the nation's second- and third-largest companies in the field of energy, according to [[Fortune (magazine)|''Fortune'']] magazine.<ref name="Devon" /> The magazine also placed Devon Energy as the second-largest company in the mining and crude oil-producing industry in the nation, while Chesapeake Energy ranks seventh respectively in that sector and [[Oklahoma Gas & Electric]] ranks as the 25th-largest gas and electric utility company.<ref name="Devon">{{cite news |year=2007|url=https://money.cnn.com/magazines/fortune/fortune500/snapshots/1866.html| title= Three Fortune's Snapshot: Devon energy| publisher=CNN| access-date=August 1, 2007}}</ref>

Oklahoma Gas & Electric, commonly referred to as OG&E (NYSE: OGE) operates four base electric power plants in Oklahoma. Two of them are coal-fired power plants: one in [[Muskogee, Oklahoma|Muskogee]], and the other in [[Red Rock, Oklahoma|Red Rock]]. Two are gas-fired power plants: one in [[Harrah, Oklahoma|Harrah]] and the other in [[Konawa, Oklahoma|Konawa]]. OG&E was the first electric company in Oklahoma to generate electricity from wind farms in 2003.<ref name="OG&E Energy">{{cite web| date=2012| url=http://www.oge.com/about/History/Pages/home.aspx| title=OG&E Energy, A History of Positive Energy| publisher=OG&E Energy| access-date=December 15, 2013| archive-date=December 16, 2013| archive-url=https://web.archive.org/web/20131216014020/http://www.oge.com/about/History/Pages/home.aspx}}</ref>