North America

in the US and Canada
History of Shale Gas PlaysThe first commercial gas well in the US was completed in New York’s Dunkirk Shale in 1821. Estimates indicate that over 28,000 shale-gas wells have been drilled in the United States since then.
The first Barnett Shale gas production by Mitchell Energy & Development Corp took place in the Fort Worth Basin in 1981. Until the Barnett Shale successes, it was believed that natural fractures had to be present in gas shale. A low-permeability gas-shale play is presently viewed as a technological play. Advances in micro-seismic fracture mapping, 3D seismic, horizontal drilling, fracture stimulation and multiple frac stages, have all contributed to successful gas shale wells, however, low commodity prices became a serious problem in 2015 for oil and gas producers.
By the early 2000’s the main gas shale plays to that point had been: Antrim Shale in the northern Michigan Basin; Barnett Shale in the Fort Worth Basin, Texas; Lewis Shale in the San Juan Basin; New Albany Shale in the Illinois Basin; and the Ohio Shale in the Appalachian Basin. More recent gas shale plays include the Woodford Shale in Oklahoma; Fayetteville Shale in Arkansas; Haynesville Shale in Louisiana; Marcellus Shale in the Appalachian Basin; Utica Shale in New York; and Eagle Ford Shale in Texas. There are 57 United States and Canadian gas-shale plays listed below.Marcellus and Utica Shale plays mapIn early 2011, the latest exploration ‘buzz’ around New York, Ohio, Pennsylvania and West Virginia concerns the Utica Shale in eastern Ohio.
Gas Shales
United States & Canada (in green)
Antrim ShaleLate DevonianMichigan Basin, Michigan
Baxter ShaleLate CretaceousVermillion Basin, Colorado, Wyoming
Barnett ShaleMississippianFort Worth and Permian basins, Texas
Bend ShalePennsylvanianPalo Duro Basin, Texas
Cane Creek ShalePennsylvanianParadox Basin, Utah
Caney ShaleMississippianArkoma Basin, Oklahoma
Chattanooga ShaleLate DevonianAlabama, Arkansas, Kentucky, Tennessee
Chimney Rock ShalePennsylvanianParadox Basin, Colorado, Utah
Cleveland ShaleDevonianEastern Kentucky
Clinton ShaleEarly SilurianEastern Kentucky
Cody ShaleCretaceousMontana
Colorado ShaleCretaceousCentral Alberta, Saskatchewan
Conasauga ShaleMiddle CambrianBlack Warrior Basin, Alabama
Dunkirk ShaleUpper DevonianWestern New York
Duvernay ShaleLate DevonianWest central Alberta
Eagleford ShaleLate CretaceousMaverick Basin, Texas
Ellsworth ShaleLate DevonianMichigan Basin, Michigan
Excello ShalePennsylvanianKansas, Oklahoma
Exshaw ShaleDevonian-MississippianAlberta, northeast British Columbia
Fayetteville ShaleMississippianArkoma Basin, Arkansas
Fernie ShaleJurassicWest central Alberta, northeast British Columbia
Floyd/Neal ShaleLate MississippianBlack Warrior Basin, Alabama, Mississippi
Frederick Brook ShaleMississippianNew Brunswick, Nova Scotia
Gammon ShaleLate CretaceousWilliston Basin, Montana
Gordondale ShaleEarly JurassicNortheast British Columbia
Gothic ShalePennsylvanianParadox Basin, Colorado, Utah
Green River ShaleEoceneColorado, Utah
Haynesville/Bossier ShaleLate JurassicLouisiana, east Texas
Horn River ShaleMiddle DevonianNortheast British Columbia
Horton Bluff ShaleEarly MississippianNova Scotia
Hovenweep ShalePennsylvanianParadox Basin, Colorado, Utah
Huron ShaleDevonianPart of Ohio Shale; east Kentucky, Ohio, Virginia, West Virginia
Klua/Evie ShaleMiddle DevonianNortheast British Columbia
Lewis ShaleLate CretaceousColorado, New Mexico
Mancos ShaleCretaceousSan Juan Basin, New Mexico, Uinta Basin, Utah
Manning Canyon ShaleMississippianCentral Utah
Marcellus ShaleDevonianNew York, Ohio, Pennsylvania, West Virginia
McClure ShaleMioceneSan Joaquin Basin, California
Monterey ShaleMioceneSanta Maria Basin, California
Montney-Doig ShaleTriassicAlberta, northeast British Columbia
Moorefield ShaleMississippianArkoma Basin, Arkansas
Mowry ShaleCretaceousBighorn and Powder River basins, Wyoming
Muskwa ShaleLate DevonianNortheast British Columbia
New Albany ShaleDevonian-MississippianIllinois Basin, Illinois, Indiana
Niobrara ShaleLate CretaceousDenver Basin, Colorado
Nordegg/Gordondale ShaleLate JurassicAlberta, northeast British Columbia
Ohio ShaleDevonianEast Kentucky, Ohio, West Virginia
Pearsall ShaleCretaceousMaverick Basin, Texas
Percha ShaleDevonian-MississippianWest Texas
Pierre ShaleCretaceousRaton Basin, Colorado
Poker Chip ShaleJurassicWest central Alberta, northeast British Columbia
Queenston ShaleOrdovicianNew York
Rhinestreet ShaleDevonianAppalachian Basin
Second White Speckled ShaleLate CretaceousSouthern Alberta
Sunbury ShaleMississippianAppalachian Basin
Utica ShaleOrdovicianNew York, Ohio, Pennsylvania, West Virginia, Quebec
Wilrich/Buckinghorse/ Garbutt/Moosebar ShaleEarly CretaceousWest central Alberta, northeast British Columbia
Woodford ShaleLate Devonian-Early MississippianOklahoma, Texas
Geologic Time Scale (off site)
Cretaceous71 – 145
Jurassic151 – 200
Triassic204 – 251
Permian254 – 299
Pennsylvanian304 – 318
Mississippian326 – 359
Devonian374 – 416
Silurian419 – 444
Ordovician446 – 488
Cambrian496 – 542
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