|This article is part of the FrackSwarm coverage of fracking.|
The Barnett Shale is a geological formation of sedimentary rocks with oil and gas resources. The productive part of the formation is estimated to stretch from the city of Dallas west and south, covering 5,000 square miles (13,000 km²) and 18 counties. In contrast to older shale gas plays, such as the Antrim Shale, the New Albany Shale, and the Ohio Shale, the Barnett Shale completions are much deeper (up to 8,000 feet). The thickness of the Barnett varies from 100 to 1000 feet, but most economic wells are located where the shale is between 300 and 600 feet thick. The success of the Barnett has spurred exploration of other deep shales for more deposits.
By mid-2012 the Barnett had produced 10 tcf of gas, accounting for approximately 50% of all modern shale gas production.
The first Barnett Shale well was completed in 1981 in Wise County, Texas. Drilling expanded greatly in the early 2000s due to higher natural gas prices and use of horizontal wells to increase production. Texas Shale Forum
In 2007, the Barnett shale (Newark East) gas field produced 1.11 cubic feet of gas, making it the second-largest source of natural gas in the United States.
In July 2015 a study sponsored by the Environmental Defense Fund reported that fracking in the Barnett Shale region of Texas was releasing at least 50 percent more methane from drilling operations than the EPA has estimated.<ref="http://grist.org/news/methane-from-fracking-is-probably-more-of-a-problem-than-epa-thinks/ "Methane from fracking is probably more of a problem than EPA thinks"] John Light, Grist, July 8, 2015.</ref>
Toxics detected near playgrounds across Barnett Shale
In September 2014, it was reported:
- Independent air tests at five separate playgrounds across the Barnett Shale have revealed hazardous chemicals associated with oil and gas development at all five. At three of the playgrounds, carcinogens were present at levels exceeding TCEQ’s long-term ambient limits.
- "The Barnett Shale," Railroad Commission of Texas, accessed Oct 2013.
- Bill Powers, Cold Hungry and in the Dark, NSP, 2013.
- Scott R. Reevbasins invigorate U.S. gas shales play, 22 Jan. 1996, p.53-58.
- US Energy Information Administration: Is U.S. natural gas production increasing?, Accessed 20 March 2009.
- "Oil & Gas Toxics Detected Near Playgrounds across the Barnett Shale" TXSHARON, September 30, 2014.
- Robert T. Ryder, Fracture Patterns and Their Origin in the Upper Devonian Antrim Shale Gas Reservoir of the Michigan Basin: A Review, US Geological Survey, Open-File Report 96-23, 1996, accessed 3 November 2009.