Shale gas | Gaz de schiste
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Shale gas - Wikipedia, the free encyclopedia
48 Shale basins in 38 nations, per the EIA Shale gas is natural gas formed from being trapped within shale formations. [ 1 ] Shale gas has become an increasingly important source of natural gas in the United States over the past decade, and interest has spread to potential gas shales in the rest of the world. One analyst expects shale gas to supply as much as half the natural gas production in North America by 2020. [ 2 ] [ dead link ] Some analysts expect that shale gas will greatly expand worldwide energy supply. [ 3 ] China is estimated to have the world's largest shale gas reserves.
Gaz de schiste - Wikipédia
Derrick et Plateforme de forage d'un puits de gaz de schiste à Marcellus ( Pennsylvanie , États-Unis). Le gaz de schiste , également appelé « gaz de roche-mère » ou « gaz de shale » , est un gaz d'origine naturelle, généré par la décomposition d' argile riche en matières organiques, et extrait à partir de terrains marneux ou argileux [ 1 ] . Contrairement au gaz naturel , il est piégé dans les roches poreuses qui le produisent, et il est nécessaire de détruire la structure de ces roches pour pouvoir le récupérer. Il joue un rôle croissant dans l'approvisionnement en gaz aux États-Unis depuis le début du XXI e siècle .
A debate is heating up over whether the fracturing technique used in natural-gas drilling could result in chemicals contaminating drinking water Lisa Bracken of Silt, Colo., worries about the water she draws from Divide Creek Jamie Kripke Editor's Note: Lustgarten is a reporter with ProPublica, a nonprofit journalism organization in New York.
[11-2008] Does Natural-Gas Drilling Endanger Water Supplies? - BusinessWee
[09-2009] Water Contamination Concerns Linger For Shale Gas : NPR
Horizontal Drilling And Water Fracturing: The Keys To Shale Gas Production Gas embedded in shale rock formations deep below the Earth's surface has long been considered inaccessible, due to high drilling costs. New horizontal drilling methods, combined with techniques to fracture the rock, have for the first time made shale gas production practical. Roll over the red dots below for more information about the drilling methods.
Fracking is an energy- and resource-intensive process. Every shale-gas well that is fracked requires between three and eight million gallons of water. Fleets of trucks have to make hundreds of trips to carry the fracking fluid to and from each well site. Due in part to spotty state laws and an absence of federal regulation, the safety record that hydraulic fracturing has amassed to date is deeply disturbing.
[06-2010] A Colossal Fracking Mess | Business | Vanity Fair
[02-2011] Regulation Lax as Gas Wells’ Tainted Water Hits Rivers - NYTimes.com
The gas has always been there, of course, trapped deep underground in countless tiny bubbles, like frozen spills of seltzer water between thin layers of shale rock. But drilling companies have only in recent years developed techniques to unlock the enormous reserves, thought to be enough to supply the country with gas for heating buildings, generating electricity and powering vehicles for up to a hundred years. So energy companies are clamoring to drill. And they are getting rare support from their usual sparring partners. Environmentalists say using natural gas will help slow because it burns more cleanly than coal and . Lawmakers hail the gas as a source of jobs.
Le "WikiLeaks" des gaz de schiste sur la radioactivité | Rue89
La gigantesque enquête sur les gaz de schiste publiée par le New York Times est une nouvelle bombe lancée sur cette technique d’extraction contre laquelle la mobilisation grandit en France . Non seulement les preuves d’effets sur la santé se multiplient, mais l’enquête révèle que l’eau rejetée par les puits est radioactive. Le quotidien américain a consacré de gros moyens au déchiffrage des quelque 30 000 pages de documents confidentiels provenant de l’agence américaine de protection de l’environnement, l’ EPA , et de différentes sources internes à l’industrie, qu’il s’est procurés. Une méthode « à la manière de WikiLeaks », mais avec le professionnalisme des équipes du journal, qui ont ajouté aux données brutes :
Documents: Leaked Industry E-Mails and Reports - Interactive Feature - NYTimes.com
Over the past six months, The New York Times reviewed thousands of pages of documents related to shale gas, including hundreds of industry e-mails, internal agency documents and reports by analysts. A selection of these documents is included here; names and identifying information have been redacted to protect the confidentiality of sources, many of whom were not authorized by their employers to communicate with The Times.
La rumeur dans le milieu des indépendants est que les grandes zones d’extraction des gaz de schiste ne sont qu’une énorme pyramide de Ponzi et que le modèle économique ne marche tout simplement pas. Ce jugement sans appel n’est pas celui d’un militant écologiste : en bas de ce mail révélé par le New York Times figure la signature du très sérieux cabinet IHS Drilling Data , expert en énergie. Au total, ce sont des centaines de communications internes au secteur de l’énergie que le quotidien américain a publié le 27 juin 2011.
