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The Devonian Woodford Shale in Oklahoma is from 50 to 300 feet (15 – 91 m) thick. Although the first gas production was recorded in 1939, by late 2004, there were only 24 Woodford Shale gas wells.
By early 2008, there were more than 750 Woodford gas wells. Like many shale gas plays, the Woodford started with vertical wells, then became dominantly a play of horizontal wells. The play is mostly in the Arkoma Basin of southeast Oklahoma, but some drilling has extended the play west into the Anadarko Basin and south into the Ardmore Basin.
The largest gas producer from the Woodford is Newfield Exploration; other operators include Devon Energy, Chesapeake Energy, Cimarex Energy, Antero Resources, St. Mary Land and Exploration, XTO Energy, Pablo Energy, Petroquest Energy, Continental Resources, and Range Resources. Production from the Woodford Shale has peaked and is now in decline, however, with production around 300 mmcf/day by 2012. Historic gas production from Woodford is an estimated 1 tcf, as of mid-2012.
- Oklahoma Geological Survey: Map of Woodford shale wells, accessed 25 February 2009.
- Brian J. Cardott: Overview of Woodford gas-shale play in Oklahoma, 2008 update, PDF file, retrieved 25 February 2009.
- Travis Vulgamore and others, "Hydraulic fracturing diagnostics help optimize stimulations of Woodford Shale horizontals," American Oil and Gas Reporter, Mar. 2008, p.66-79.
- David Brown, "Big potential boosts Woodford," AAPG Explorer, July 2008, p.12-16.
- Woodford Shale production, 2005-2011, The Oil Drum
- Bill Powers, Cold Hungry and in the Dark, NSP, 2013.
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