Talk:Horizontal hydraulic fracturing

Penetrating oil
Much of the difficulty with the fluid, when it gets into the water table or is spilled is the chemicals used to penetrate small cracks. The same chemicals are used in which is notoriously dangerous. The issue is the ability of these chemicals to pass through cell walls, and carry dissolved materials into living cells. User:Fred Bauder Talk 21:22, 10 March 2013 (GMT)

Workspace
This is stuff I yanked out of the article; might use later. - - - -

One of the functions of these cracks is to connect the hole with preexisting networks of fractures in the rock, thus greatly increasing the accesibility of the hole to the oil and/or natural gas dispersed throughout the rock.

It is used when the oil or gas is distributed throughout the rock in the spaces between rock grains, or in small pores or fractures, rather than in large pockets that can be tapped simply by drilling a hole straight down into the pocket. Earthmonkey 21:55, 18 March 2013 (GMT)

Stuff from the net that I'm parking here for now
http://www.propublica.org/article/years-after-evidence-of-fracking-contamination-epa-to-supply-drinking-water/

http://s3.amazonaws.com/propublica/assets/natural_gas/final_cabot_co-a.pdf Commonwealth of Pennsylvania Department of Environmental Protection, Consent Order and Agreement. (Against Cabot Oil and Gas Corporation, regarding methane contamination of groundwater in Dimrock, PA.)

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From http://www.propublica.org/article/feds-link-water-contamination-to-fracking-for-first-time/single

"Feds link water contamination to fracking for first time" Abraham Lustgarten and Nicholas Kusnetz, ProPublica, 8 Dec 2011

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http://www.epa.gov/region8/superfund/wy/pavillion/EPA_ReportOnPavillion_Dec-8-2011.pdf

EPA Draft Report on contamination of wells in Pavillion, Wyoming, by hydrofracked shallow petroleum wells.

Investigators tested the cement and casing of the gas wells and found what they described as “sporadic bonding” of the cement in areas immediately above where fracking took place. The cement barrier meant to protect the well bore and isolate the chemicals in their intended zone had been weakened and separated from the well, the EPA concluded.

The report also found that hydrologic pressure in the Pavillion area had pushed fluids from deeper geologic layers towards the surface. Those layers were not sufficient to provide a reliable barrier to contaminants moving upward, the report says.

Throughout its investigation in Wyoming, The EPA was hamstrung by a lack of disclosure about exactly what chemicals had been used to frack the wells near Pavillion. EnCana declined to give federal officials a detailed breakdown of every compound used underground. The agency relied instead on more general information supplied by the company to protect workers’ health.

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http://www.propublica.org/series/fracking

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"Evaluation of Impacts to Underground Sources June 2004 of Drinking Water by Hydraulic Fracturing of Coalbed Methane Reservoirs" Part of EPA rreport, vertical frac in coalbed methane: potentials for groundwater contamination Production layers didn't look very deep. http://s3.amazonaws.com/propublica/assets/natural_gas/epa_evaluation_june2004.pdf

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US EPA's fracking main page: http://www2.epa.gov/hydraulicfracturing

Earthmonkey 00:34, 20 March 2013 (GMT)


 * Great project! Thanks so much for doing this. User:Fred Bauder Talk 01:51, 20 March 2013 (GMT)
 * Thanks Fred -- Earthmonkey 21:04, 23 March 2013 (GMT)

"California’s plugging regulations require cement plugs to be placed at the following locations: a 200-foot plug straddling the surface casing shoe, a plug across oil and gas bearing strata that extends 100 feet above the strata, a plug extending from 50 feet below to 50 feet above the base of waterbearing strata, and a 50-foot plug at the surface of the wellbore (State of California, 2007)." Earthmonkey 01:30, 27 March 2013 (GMT)
 * -- "Plugging and Abandonment of Oil and Gas Wells," National Petroleum Council (NPC), 2011.

Image display
The wellfield layouts and "hydrofracking pad" picture display OK on my computer (Windows and Internet Explorer [I'm ashamed to admit that I still use them]). But if they're messing up on your computer they're probably messing up on many other people's computers also, and so need to be removed or fixed. Maybe we can fix them. -- Tribal (talk) 17:30, 5 September 2016 (CDT)