{"id":69300,"date":"2013-09-19T05:59:08","date_gmt":"2013-09-19T04:59:08","guid":{"rendered":"http:\/\/www.pressenza.com\/?p=69300"},"modified":"2013-09-19T06:19:20","modified_gmt":"2013-09-19T05:19:20","slug":"gaz-schiste-cest","status":"publish","type":"post","link":"https:\/\/www.pressenza.com\/fr\/2013\/09\/gaz-schiste-cest\/","title":{"rendered":"Le gaz de schiste, c\u2019est quoi ?"},"content":{"rendered":"<p>Contrairement au gaz naturel conventionnel qui est retenu dans une roche perm\u00e9able permettant une exploitation facile, le gaz de schiste est pi\u00e9g\u00e9 dans les porosit\u00e9s d\u2019une roche rendue imperm\u00e9able par l\u2019 argile qu\u2019elle contient.<\/p>\n\n<p>L\u2019extraction du gaz de schiste, particuli\u00e8rement difficile, n\u00e9cessite le recours syst\u00e9matique aux techniques du forage dirig\u00e9 et de la fracturation hydraulique particuli\u00e8rement co\u00fbteuses. Le type de roche qui sert de r\u00e9servoir au gaz de schiste peut \u00e9galement contenir de l\u2019huile de schiste (p\u00e9trole) mais dans des proportions beaucoup plus faibles.<\/p>\n<p>L\u2019exploitation \u00e0 grande \u00e9chelle du gaz de schiste a d\u00e9marr\u00e9 au cours des ann\u00e9es 2000 lorsque le prix des hydrocarbures s\u2019est \u00e9tabli durablement au-dessus d\u2019un seuil \u00e9lev\u00e9 en relation avec la stagnation de la production du p\u00e9trole et du gaz conventionnel et la croissance de la consommation \u00e9nerg\u00e9tique mondiale.<\/p>\n<p>Ces prix ainsi que les avanc\u00e9es dans le domaine des techniques d\u2019extraction ont permis de financer les investissements tr\u00e8s importants n\u00e9cessaires pour permettre la mise en production de nombreux puits aux \u00c9tats-Unis. Ce pays a jou\u00e9 un r\u00f4le de pionnier dans la mise en exploitation de cette nouvelle ressource\u00a0: le gaz de schiste y repr\u00e9sente en 2013 une proportion importante du bouquet \u00e9nerg\u00e9tique.<\/p>\n<p>Gr\u00e2ce au gaz de schiste les \u00c9tats-Unis sont redevenus un exportateur net de gaz naturel et dans le futur devraient \u00eatre \u00e0 nouveau un exportateur net d\u2019\u00e9nergie.<\/p>\n<p>Les r\u00e9serves non prouv\u00e9es dans le monde sont estim\u00e9es \u00e0 206.000 milliards de m\u00b3 de gaz de schiste (32\u00a0% des r\u00e9serves totales de gaz naturel) et 345 milliards de barils d\u2019huile de schiste (10\u00a0% des r\u00e9serves totales de p\u00e9trole). Les r\u00e9serves de gaz de schiste sont r\u00e9parties sur tous les continents mais la Chine, l\u2019Argentine, l\u2019Alg\u00e9rie et les \u00c9tats-Unis en sont dans cet ordre les plus gros d\u00e9tenteurs. D\u00e8s \u00e0 pr\u00e9sent l\u2019augmentation de la production de gaz de schiste aux \u00c9tats-Unis et au Canada entra\u00een\u00e9 une pression \u00e0 la baisse du prix du gaz qui emp\u00eache d\u00e9sormais la Russie de dicter des prix \u00e9lev\u00e9s pour le gaz naturel qu\u2019ils exportent vers l\u2019Europe.<\/p>\n<p>Les probl\u00e8mes environnementaux constat\u00e9s ou suppos\u00e9s associ\u00e9s \u00e0 l\u2019extraction du gaz de schiste, notamment l\u2019utilisation intensive et la pollution des r\u00e9serves d\u2019eau, entra\u00eenent dans certains pays une d\u00e9fiance d\u2019une partie de l\u2019opinion publique vis-\u00e0-vis de la mise en exploitation de cette ressource.<\/p>\n<p>Le sujet y fait l\u2019objet de controverses tr\u00e8s vives qui opposent d\u2019une part ceux qui voient l\u00e0 un moyen de diminuer les importations \u00e9nerg\u00e9tiques et d\u2019augmenter les revenus du pays ainsi que les industriels du secteur p\u00e9trolier et d\u2019autre part diff\u00e9rents mouvements mettant en avant des arguments \u00e9cologiques. Pour cette raison, dans certains pays comme la France, la recherche et la production du gaz de schiste font l\u2019objet en 2013 d\u2019un moratoire.<\/p>\n<p>Source :\u00a0<a href=\"http:\/\/lejournaldusiecle.com\/2013\/09\/18\/le-gaz-de-schiste-cest-quoi\/\">http:\/\/lejournaldusiecle.com\/2013\/09\/18\/le-gaz-de-schiste-cest-quoi\/<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contrairement au gaz naturel conventionnel qui est retenu dans une roche perm\u00e9able permettant une exploitation facile, le gaz de schiste est pi\u00e9g\u00e9 dans les porosit\u00e9s d\u2019une roche rendue imperm\u00e9able par l\u2019 argile qu\u2019elle contient. L\u2019extraction du gaz de schiste, particuli\u00e8rement&hellip;<\/p>\n","protected":false},"author":926,"featured_media":69304,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[97,100,40,495],"tags":[6804],"class_list":["post-69300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environnement-et-ecologie","category-economie","category-international-fr","category-sciences-technologie","tag-gaz-de-schiste"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le gaz de schiste, c\u2019est quoi ?<\/title>\n<meta name=\"description\" content=\"Contrairement au gaz naturel conventionnel qui est retenu dans une roche perm\u00e9able permettant une exploitation facile, le gaz de schiste est pi\u00e9g\u00e9 dans\" \/>\n<meta name=\"robots\" content=\"index, follow, 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