{"id":1607,"date":"2021-12-19T08:00:00","date_gmt":"2021-12-19T11:00:00","guid":{"rendered":"https:\/\/museuweg.net\/blog\/?p=1607"},"modified":"2026-02-09T15:47:31","modified_gmt":"2026-02-09T18:47:31","slug":"mas-afinal-o-que-e-o-pre-sal","status":"publish","type":"post","link":"https:\/\/museuweg.net\/blog\/mas-afinal-o-que-e-o-pre-sal\/","title":{"rendered":"Mas, afinal, o que \u00e9 o pr\u00e9-sal?"},"content":{"rendered":"\n<p>Muito se fala sobre o pr\u00e9-sal e como sua descoberta foi importante para todo o mundo nos \u00faltimos anos.<\/p>\n\n\n\n<p>O \u00f3leo leve e de excelente qualidade possui um alto valor comercial. Uma realidade que coloca o Brasil entre os principais atores no cen\u00e1rio energ\u00e9tico mundial.<\/p>\n\n\n\n<p>Cerca de 2\/3 da superf\u00edcie do planeta s\u00e3o cobertos por \u00e1gua, e, para conhecer o pr\u00e9-sal, precisamos explorar as \u00e1guas ultraprofundas que s\u00e3o, basicamente, encontradas a uma profundidade de mais de 1.501 metros.<\/p>\n\n\n\n<p>Voc\u00ea est\u00e1 pronto para conhecer as \u00e1guas ultraprofundas e descobrir <strong>o que \u00e9 o pr\u00e9-sal<\/strong>?&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>O que \u00e9 o pr\u00e9-sal?<\/strong><\/h2>\n\n\n\n<p>Geologicamente falando, o pr\u00e9-sal se refere a uma \u00e1rea de reservas petrol\u00edferas, formadas principalmente por rochas carbon\u00e1ticas, localizada abaixo de uma profunda camada de sal no subsolo marinho.<\/p>\n\n\n\n<figure class=\"wp-block-gallery aligncenter has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" data-id=\"2806\" src=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2023\/03\/O-que-e-o-pre-sal.jpg\" alt=\"\" class=\"wp-image-2806\" srcset=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2023\/03\/O-que-e-o-pre-sal.jpg 1024w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2023\/03\/O-que-e-o-pre-sal-300x176.jpg 300w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2023\/03\/O-que-e-o-pre-sal-768x450.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>Essa \u00e1rea \u00e9 chamada de pr\u00e9-sal em raz\u00e3o da escala de tempo geol\u00f3gica, ou seja, o tempo de forma\u00e7\u00e3o do <a href=\"https:\/\/museuweg.net\/blog\/conheca-derivados-do-petroleo-que-fazem-parte-do-seu-dia-a-dia\/#content\">petr\u00f3leo<\/a>. Isso quer dizer que a camada de reserva de petr\u00f3leo do pr\u00e9-sal foi formada antes da rocha de camada salina que a cobriu por milh\u00f5es de anos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Como o pr\u00e9-sal foi formado?<\/strong><\/h3>\n\n\n\n<p>A camada de pr\u00e9-sal foi formada pela separa\u00e7\u00e3o dos atuais continentes Americano e Africano, que come\u00e7ou h\u00e1 cerca de 150 milh\u00f5es de anos.<\/p>\n\n\n\n<p>As depress\u00f5es causadas pela separa\u00e7\u00e3o dos continentes deram origem a grandes lagos. Nas regi\u00f5es mais profundas desses lagos, foram acumuladas enormes quantidades de mat\u00e9ria org\u00e2nica proveniente, em maior parte, de algas microsc\u00f3picas.&nbsp;<\/p>\n\n\n\n<p>Ao se misturar com sedimentos e passar por um processo que envolve altas temperaturas e press\u00f5es, essa mat\u00e9ria org\u00e2nica transformou-se em \u00f3leo e g\u00e1s em um processo chamado gera\u00e7\u00e3o.<\/p>\n\n\n\n<p>Durante a separa\u00e7\u00e3o dos continentes, as partes mais rasas, como as grandes ilhas, receberam muitas conchas calc\u00e1reas (as coquinas) e posteriormente viraram dep\u00f3sitos de estromat\u00f3litos (tipos de algas que formam rochas calc\u00e1reas).&nbsp;<\/p>\n\n\n\n<p>S\u00e3o esses dois tipos de dep\u00f3sitos que constituem os principais reservat\u00f3rios do pr\u00e9-sal.<\/p>\n\n\n\n<p>\u00c0 medida que os continentes se distanciaram, os materiais org\u00e2nicos que estavam acumulados nesse novo espa\u00e7o foram sendo cobertos pelas \u00e1guas do <a href=\"https:\/\/museuweg.net\/blog\/voz-dos-oceanos-conheca-a-expedicao-que-esta-dando-a-volta-ao-mundo-estudando-a-poluicao-dos-oceanos\/#content\">Oceano Atl\u00e2ntico<\/a>, que ent\u00e3o se formava. Naquele tempo, o clima \u00e1rido era predominante.<\/p>\n\n\n\n<p>Esse clima contribuiu para a evapora\u00e7\u00e3o da \u00e1gua marinha, que causou a acumula\u00e7\u00e3o de sais depositados sob a <a href=\"https:\/\/museuweg.net\/blog\/energia-renovavel-como-e-produzida-a-energia-a-partir-da-biomassa\/#content\">mat\u00e9ria org\u00e2nica<\/a>. O ac\u00famulo resultou na espessa camada de sal que funcionou como uma barreira para impedir que o petr\u00f3leo chegasse \u00e0 superf\u00edcie.<\/p>\n\n\n\n<p>Nesse per\u00edodo, processos termoqu\u00edmicos transformaram a camada org\u00e2nica em hidrocarbonetos (petr\u00f3leo e g\u00e1s natural).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Pr\u00e9-sal no Brasil<\/strong><\/h3>\n\n\n\n<p>No Brasil, entre os estados de Santa Catarina e Esp\u00edrito Santo, existe uma \u00e1rea de aproximadamente 149 mil quil\u00f4metros quadrados no mar chamada de Pol\u00edgono do Pr\u00e9-Sal, uma das mais importantes descobertas de petr\u00f3leo e g\u00e1s natural dos \u00faltimos anos.<\/p>\n\n\n\n<p>Hoje, o pr\u00e9-sal brasileiro \u00e9 um dos tr\u00eas maiores produtores de petr\u00f3leo do mundo, o que garante que o pa\u00eds se resguarde em caso de eventuais crises energ\u00e9ticas.&nbsp;<\/p>\n\n\n\n<p>As descobertas de petr\u00f3leo nos reservat\u00f3rios do pr\u00e9-sal refor\u00e7am o papel do Brasil como importante ator no cen\u00e1rio energ\u00e9tico mundial e geram importante insumo para o desenvolvimento econ\u00f4mico do pa\u00eds.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Obst\u00e1culos para a extra\u00e7\u00e3o do pr\u00e9-sal<\/strong><\/h3>\n\n\n\n<p>&#8211; A profundidade: o petr\u00f3leo fica abaixo de pelo menos 2 km de \u00e1gua, mais 2 km de rocha e, por fim, 2 km de crosta de sal.<\/p>\n\n\n\n<p>&#8211; O sal: este \u00e9 o maior problema enfrentado. A tr\u00eas ou quatro mil metros de profundidade, o sal se comporta como um material viscoso, inst\u00e1vel, obrigando os pa\u00edses a desenvolverem novas tecnologias.<\/p>\n\n\n\n<p>&#8211; Manter o petr\u00f3leo aquecido: o petr\u00f3leo das camadas do pr\u00e9-sal ferve dentro das rochas, e \u00e9 preciso mant\u00ea-lo quente, pois a queda de temperatura induz a forma\u00e7\u00e3o de co\u00e1gulos que entopem os dutos.<\/p>\n\n\n\n<p>&#8211; Custo: em raz\u00e3o da profundidade, da complexidade da opera\u00e7\u00e3o, das novas tecnologias e do aumento da m\u00e3o de obra, \u00e9 necess\u00e1rio um grande investimento por parte do governo.<\/p>\n\n\n\n<p>Apesar das dificuldades, existem muitos benef\u00edcios com a extra\u00e7\u00e3o do petr\u00f3leo do pr\u00e9-sal. Esse \u00f3leo \u00e9 considerado leve, ou seja, de baixa densidade, e a camada de sal conserva a sua qualidade.&nbsp;<\/p>\n\n\n\n<p>Sendo assim, ele \u00e9 mais f\u00e1cil de ser refinado, possui menos enxofre, polui menos e, dessa forma, \u00e9 mais valorizado no com\u00e9rcio mundial.<\/p>\n\n\n\n<p>Voc\u00ea sabia dessas curiosidades sobre o pr\u00e9-sal? Continue no blog e conhe\u00e7a tamb\u00e9m o document\u00e1rio <a href=\"https:\/\/museuweg.net\/blog\/conheca-o-webdocumentario-sirius-acelerando-o-futuro-da-ciencia\/\">Sirius: acelerando o futuro da ci\u00eancia<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea est\u00e1 pronto para conhecer as \u00e1guas ultraprofundas e descobrir o que \u00e9 o pr\u00e9-sal? <\/p>\n","protected":false},"author":4,"featured_media":2507,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,603,21],"tags":[123,806,804,803,805,740,802],"class_list":["post-1607","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia-2","category-curiosidades","category-tecnologia-2","tag-brasil","tag-como-e-formado-o-pre-sal","tag-o-que-e","tag-oceanos","tag-oleo-leve","tag-petroleo","tag-pre-sal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mas, afinal, o que \u00e9 o pr\u00e9-sal? 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