{"id":1869,"date":"2008-09-30T14:36:38","date_gmt":"2008-09-30T14:36:38","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/09\/30\/la-notion-de-pe\/"},"modified":"2012-07-12T10:59:55","modified_gmt":"2012-07-12T10:59:55","slug":"la-notion-de-pe","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/09\/30\/la-notion-de-pe\/","title":{"rendered":"La notion de peak oil : une illusion math\u00e9matique st\u00e9rile"},"content":{"rendered":"<p>&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;Certains g\u00e9ologues, apr\u00e8s avoir r\u00e9vis\u00e9 leur cours de math, ont invent\u00e9 un jour un concept marketing bien fumeux mais combien mena\u00e7ant, sorte de punition divine \u00e0 retardement : le peak oil. On assiste depuis \u00e0 l&#039;\u00e9dition d&#039;une floraison de courbes de productions quotidiennes de p\u00e9trole, souvent retouch\u00e9es ou corrig\u00e9es, passant toutes par un maximum souvent proche ou d\u00e9pass\u00e9 (FIG. \u00e0 la fin du m\u00e9mo). Mais pour certains plus r\u00e9alistes, plus raisonnables, int\u00e9grant les progr\u00e8s technologiques d&#039;exploration et de production, ainsi que les hausses de prix du p\u00e9trole faisant sauter bien des contraintes financi\u00e8res, imaginent des r\u00e9serves ultimes bien plus importantes que celles estim\u00e9es par les &quot;pickistes&quot; purs et durs.<a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/peakoildelayedrichardnehring2007c1.jpg\"><img loading=\"lazy\" decoding=\"async\" alt=\"Peakoildelayedrichardnehring2007c\"  height=\"423\" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/peakoildelayedrichardnehring2007c.jpg\" width=\"480\" \/><\/a> La notion de pic n&#039;apporte rien au d\u00e9bat, il suffit de faire une hypoth\u00e8se sur les r\u00e9serves ultimes et d&#039;imaginer les consommations futures.<\/p>\n<p>&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;Les courbes de consommation de p\u00e9troles dans les ann\u00e9es \u00e0 venir imagin\u00e9es et publi\u00e9es par Richard Nehring par exemple ou d&#039;autres, partent d&#039;abord d&#039;un postulat jusque l\u00e0 non remis en cause: les consommations mondiales de p\u00e9trole vont poursuivre leur ascension (FIG., courbe verte). Par la suite elles se stabilisent \u00e0 95 millions de barils par jour, dans l&#039;hypoth\u00e8se m\u00e9diane de Nehring. La consommation cumul\u00e9e arriv\u00e9e \u00e0 80% des r\u00e9serves ultimes suppos\u00e9es \u00e0 4100 milliards de barils, la production de ces volumes stables devient alors impossible et la consommation baisse in\u00e9luctablement.<\/p>\n<p>&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160; Il existe un autre sc\u00e9nario tout aussi utopique qui consisterait \u00e0 imaginer un r\u00e9gime mondial tout puissant qui d\u00e9ciderait demain, afin de m\u00e9nager un traitement progressif \u00e0 l&#039;addiction au p\u00e9trole, d&#039;imposer une d\u00e9croissance r\u00e9guli\u00e8re des consommations annuelles mondiales de p\u00e9trole: c&#039;est le sc\u00e9nario dit &quot;communiste&quot; international (courbe violette). Un tel sc\u00e9nario sans \u00e0 coups, r\u00e9duirait les possibilit\u00e9s de crises et permettrait aux \u00e9conomies de s&#039;adapter progressivement \u00e0 la disparition certaine de la ressource.<\/p>\n<p>&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; Entre ces deux cas extr\u00eames se situera s\u00fbrement la r\u00e9alit\u00e9, dirig\u00e9e par les march\u00e9s et les contraintes politiques multiples et non pas par les seules ressources. Elle ressemblera \u00e0 quelque chose comme la courbe rouge. Dans cette hypoth\u00e8se tout d&#039;abord une croissance des consommations jusqu&#039;en 2030 n&#039;a plus cours. Au contraire un processus de d\u00e9sensibilisation des pays de l&#039;OCDE au p\u00e9trole \u00e9tant d\u00e9j\u00e0 lanc\u00e9, c&#039;est plut\u00f4t une stabilisation ou une d\u00e9croissance des consommations qui va \u00eatre observ\u00e9e mais qui n&#039;est pas due \u00e0 une r\u00e9duction de l&#039;offre, mais \u00e0 celle de la demande. Par la suite au gr\u00e8 des crises et des pouss\u00e9es de fi\u00e8vres des cours, nous en vivons une en ce moment, les \u00e9conomies par paliers s&#039;adapteront \u00e0 la nouvelle donne \u00e9conomique, diff\u00e9rente de la pr\u00e9c\u00e9dente et plus \u00e9conome en p\u00e9trole. Bien s\u00fbr ce sont les autres formes d&#039;\u00e9nergie, moins ch\u00e8res qui se substitueront au p\u00e9trole.<\/p>\n<p>&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;Ce qui est int\u00e9ressant c&#039;est d&#039;\u00e9tablir la liste des grandes ou des petites innovations qui viendront soutenir un sc\u00e9nario de ce type sur une p\u00e9riode de 80 ans correspondant \u00e0 la vie d&#039;un \u00eatre humain naissant aujourd&#039;hui (liste de loin non exhaustive):<\/p>\n<ul>\n<li>le d\u00e9veloppement des biocarburants,<\/li>\n<li>la g\u00e9n\u00e9ralisation de la conversion profonde dans toutes les raffineries,<\/li>\n<li>la croissance de l&#039;efficacit\u00e9 \u00e9nerg\u00e9tique des v\u00e9hicules (dies\u00e9lisation, r\u00e9duction des masses, fin des 4X4, a\u00e9rodynamisme, pneumatiques, etc.)<\/li>\n<li>les v\u00e9hicules hybrides (voitures puis poids lourds),<\/li>\n<li>les v\u00e9hicules au gaz naturel comprim\u00e9 ou au DME, \u00e9ventuellement hybrides,<\/li>\n<li>les v\u00e9hicules \u00e9lectriques,<\/li>\n<li>la r\u00e9duction des consommations de carburants dans les transports maritimes et a\u00e9riens,<\/li>\n<li>le d\u00e9veloppement du transport ferroviaire par TGV dans de multiples r\u00e9gions du monde,<\/li>\n<li>la disparition du chauffage des foyers au fuel et au k\u00e9ros\u00e8ne,<\/li>\n<li>la substitution de la p\u00e9trochimie par Fischer-Tropsch \u00e0 partir de gaz naturel puis de charbon,<\/li>\n<li>la relocalisation des productions dans les zones \u00e0 forte densit\u00e9 d\u00e9mographique,<\/li>\n<li>etc.<\/li>\n<\/ul>\n<p>&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; Une approche analytique concernant chacun de ces postes permettrait moyennant de multiples hypoth\u00e8ses, de quantifier les r\u00e9ductions de consommations attendues.<\/p>\n<p>Le 30 Septembre 2008.<\/p>\n<p>Pour m\u00e9moire un faisceau instructif de courbes pickistes<a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/peakoilfamily1.png\"><img loading=\"lazy\" decoding=\"async\" alt=\"Peakoilfamily\"  height=\"312\" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/peakoilfamily.png\" width=\"416\" \/><\/a> les plus r\u00e9centes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;Certains g\u00e9ologues, apr\u00e8s avoir r\u00e9vis\u00e9 leur cours de math, ont invent\u00e9 un jour un concept marketing bien fumeux mais combien mena\u00e7ant, sorte de punition divine \u00e0 retardement : le peak oil. On assiste depuis \u00e0 l&#039;\u00e9dition d&#039;une floraison de courbes de productions quotidiennes de p\u00e9trole, souvent retouch\u00e9es [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":10334,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1869","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-energie-fossile"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La notion de peak oil : une illusion math\u00e9matique st\u00e9rile - leblogenergie.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/09\/30\/la-notion-de-pe\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"La notion de peak oil : une illusion math\u00e9matique st\u00e9rile - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;&#160; &#160;Certains g\u00e9ologues, apr\u00e8s avoir r\u00e9vis\u00e9 leur cours de math, ont invent\u00e9 un jour un concept marketing bien fumeux mais combien mena\u00e7ant, sorte de punition divine \u00e0 retardement : le peak oil. 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