CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>Drilling fluid invasion - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"f1def49b-80c0-4f34-8513-911394e01f63","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"Drilling_fluid_invasion","wgTitle":"Drilling fluid invasion","wgCurRevisionId":1194565590,"wgRevisionId":1194565590,"wgArticleId":8236339,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["Articles lacking in-text citations from January 2024","All articles lacking in-text citations","All stub articles","Drilling fluid","Well logging","Petroleum stubs"],"wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"Drilling_fluid_invasion","wgRelevantArticleId":8236339,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgNoticeProject": "wikipedia","wgCiteReferencePreviewsActive":false,"wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":2000,"wgRelatedArticlesCompat":[],"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q5307647","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false,"wgGELevelingUpEnabledForUser":false}; RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=["site","mediawiki.page.ready","jquery.makeCollapsible","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.ReferenceTooltips","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns", "ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.6"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="Drilling fluid invasion - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/Drilling_fluid_invasion"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=Drilling_fluid_invasion&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/Drilling_fluid_invasion"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Drilling_fluid_invasion rootpage-Drilling_fluid_invasion skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=Drilling+fluid+invasion" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=Drilling+fluid+invasion" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Drilling+fluid+invasion" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=Drilling+fluid+invasion" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Drilling fluid invasion</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="This article exist only in this language. Add the article for other languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-0" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">Add languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> <div class="after-portlet after-portlet-lang"><span class="uls-after-portlet-link"></span><span class="wb-langlinks-add wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q5307647#sitelinks-wikipedia" title="Add interlanguage links" class="wbc-editpage">Add links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Drilling_fluid_invasion" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:Drilling_fluid_invasion" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Drilling_fluid_invasion"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Drilling_fluid_invasion&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Drilling_fluid_invasion&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Drilling_fluid_invasion"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Drilling_fluid_invasion&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Drilling_fluid_invasion&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Drilling_fluid_invasion" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Drilling_fluid_invasion" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Drilling_fluid_invasion&oldid=1194565590" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Drilling_fluid_invasion&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=Drilling_fluid_invasion&id=1194565590&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlQ%C4%B1sald%C4%B1c%C4%B1s%C4%B1&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FDrilling_fluid_invasion"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrKodu&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FDrilling_fluid_invasion"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Drilling_fluid_invasion&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Drilling_fluid_invasion&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q5307647" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-No_footnotes plainlinks metadata ambox ambox-style ambox-No_footnotes" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/40px-Text_document_with_red_question_mark.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/60px-Text_document_with_red_question_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/80px-Text_document_with_red_question_mark.svg.png 2x" data-file-width="48" data-file-height="48" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article includes a <a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources">list of references</a>, <a href="/wiki/Wikipedia:Further_reading" title="Wikipedia:Further reading">related reading</a>, or <a href="/wiki/Wikipedia:External_links" title="Wikipedia:External links">external links</a>, <b>but its sources remain unclear because it lacks <a href="/wiki/Wikipedia:Citing_sources#Inline_citations" title="Wikipedia:Citing sources">inline citations</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Wikipedia:WikiProject_Fact_and_Reference_Check" class="mw-redirect" title="Wikipedia:WikiProject Fact and Reference Check">improve</a> this article by <a href="/wiki/Wikipedia:When_to_cite" title="Wikipedia:When to cite">introducing</a> more precise citations.</span> <span class="date-container"><i>(<span class="date">January 2024</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p><b>Drilling fluid invasion</b> is a process that occurs in a well being drilled with higher wellbore pressure (normally caused by excessive mud weights) than <a href="/w/index.php?title=Formation_pressure&action=edit&redlink=1" class="new" title="Formation pressure (page does not exist)">formation pressure</a>. The liquid component of the <a href="/wiki/Drilling_mud" class="mw-redirect" title="Drilling mud">drilling fluid</a> (known as the <a href="/w/index.php?title=Mud_filtrate&action=edit&redlink=1" class="new" title="Mud filtrate (page does not exist)">mud filtrate</a>, or spurt) continues to "invade" the porous and permeable formation until the solids present in the mud, commonly <a href="/wiki/Bentonite" title="Bentonite">bentonite</a>, clog enough pores to form a <a href="/wiki/Mud_cake_(oil_and_gas)" title="Mud cake (oil and gas)">mud cake</a> capable of preventing further invasion. </p><p>If invasion is severe enough, and reservoir pressures are unable to force the fluid and associated particles out entirely when the well starts producing, the amount of oil and gas a well can produce can be permanently reduced. This is especially true when a process called <a href="/w/index.php?title=Phase_trapping&action=edit&redlink=1" class="new" title="Phase trapping (page does not exist)">phase trapping</a> occurs. This is when a fluid enters a formation that is below its <a href="/w/index.php?title=Irreducible_saturation&action=edit&redlink=1" class="new" title="Irreducible saturation (page does not exist)">irreducible saturation</a> of that fluid. Once the fluid is present, it is held in place by capillary forces and usually can not be removed. </p><p>Invasion also has significant implications for <a href="/wiki/Well_logging" title="Well logging">well logging</a>. In many cases the "depth of investigation" of a well logging tool is only a few inches (or even less for methods such as <a href="/wiki/Sonic_logging" title="Sonic logging">sonic logs</a>), and it is quite possible that drilling fluid has invaded beyond this depth. In these cases readings are strongly influenced by mud filtrate properties rather than pure formation (in situ) properties. This influence must be considered when interpreting the resulting logs. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Drilling_fluid_invasion&action=edit&section=1" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Resistivity_logging" title="Resistivity logging">Resistivity logging</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Drilling_fluid_invasion&action=edit&section=2" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFRoscoe_Moss_Company1990" class="citation book cs1">Roscoe Moss Company (21 February 1990). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=6VM0Xqxe0QUC&pg=PA56"><i>Handbook of Ground Water Development</i></a>. John Wiley & Sons. pp. 56–. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-471-85611-5" title="Special:BookSources/978-0-471-85611-5"><bdi>978-0-471-85611-5</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Handbook+of+Ground+Water+Development&rft.pages=56-&rft.pub=John+Wiley+%26+Sons&rft.date=1990-02-21&rft.isbn=978-0-471-85611-5&rft.au=Roscoe+Moss+Company&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D6VM0Xqxe0QUC%26pg%3DPA56&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrilling+fluid+invasion" class="Z3988"></span></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Petroleum_industry" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Petroleum_industry" title="Template:Petroleum industry"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Petroleum_industry" title="Template talk:Petroleum industry"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Petroleum_industry" title="Special:EditPage/Template:Petroleum industry"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Petroleum_industry" style="font-size:114%;margin:0 4em"><a href="/wiki/Petroleum_industry" title="Petroleum industry">Petroleum industry</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/Petroleum" title="Petroleum">Petroleum</a></li> <li><a href="/wiki/Primary_energy" title="Primary energy">Primary energy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Benchmark_(crude_oil)" title="Benchmark (crude oil)">Benchmarks</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Argus_Sour_Crude_Index" title="Argus Sour Crude Index">Argus Sour</a></li> <li><a href="/wiki/Bonny_Light_oil" title="Bonny Light oil">Bonny Light</a></li> <li><a href="/wiki/Brent_Crude" title="Brent Crude">Brent</a></li> <li><a href="/wiki/Dubai_Crude" title="Dubai Crude">Dubai</a></li> <li><a href="/wiki/Indian_Basket" title="Indian Basket">Indian Basket</a></li> <li><a href="/wiki/Indonesian_Crude_Price" title="Indonesian Crude Price">Indonesian</a></li> <li><a href="/wiki/Isthmus-34_Light" title="Isthmus-34 Light">Isthmus-34 Light</a></li> <li><a href="/wiki/Japan_Crude_Cocktail" title="Japan Crude Cocktail">Japan Cocktail</a></li> <li><a href="/wiki/OPEC_Reference_Basket" title="OPEC Reference Basket">OPEC Reference Basket</a></li> <li><a href="/wiki/Tapis_crude" title="Tapis crude">Tapis</a></li> <li><a href="/wiki/Urals_oil" title="Urals oil">Urals</a></li> <li><a href="/wiki/West_Texas_Intermediate" title="West Texas Intermediate">West Texas Intermediate</a></li> <li><a href="/wiki/Western_Canadian_Select" title="Western Canadian Select">Western Canadian Select</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Data</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left; font-weight:normal;">Natural gas</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_countries_by_natural_gas_consumption" title="List of countries by natural gas consumption">Consumption</a></li> <li><a href="/wiki/List_of_countries_by_natural_gas_production" title="List of countries by natural gas production">Production</a></li> <li><a href="/wiki/List_of_countries_by_natural_gas_proven_reserves" title="List of countries by natural gas proven reserves">Reserves</a></li> <li><a href="/wiki/List_of_countries_by_natural_gas_imports" title="List of countries by natural gas imports">Imports</a></li> <li><a href="/wiki/List_of_countries_by_natural_gas_exports" title="List of countries by natural gas exports">Exports</a></li> <li><a href="/wiki/Natural_gas_prices" title="Natural gas prices">Price</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left; font-weight:normal;">Petroleum</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_countries_by_oil_consumption" title="List of countries by oil consumption">Consumption</a></li> <li><a href="/wiki/List_of_countries_by_oil_production" title="List of countries by oil production">Production</a></li> <li><a href="/wiki/List_of_countries_by_proven_oil_reserves" title="List of countries by proven oil reserves">Reserves</a></li> <li><a href="/wiki/List_of_countries_by_oil_imports" title="List of countries by oil imports">Imports</a></li> <li><a href="/wiki/List_of_countries_by_oil_exports" title="List of countries by oil exports">Exports</a></li> <li><a href="/wiki/Posted_oil_price" title="Posted oil price">Posted oil price</a></li> <li><a href="/wiki/Price_of_oil" title="Price of oil">Price</a> <ul><li><a href="/wiki/Gasoline_and_diesel_usage_and_pricing" title="Gasoline and diesel usage and pricing">of gasoline and diesel</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Hydrocarbon_exploration" title="Hydrocarbon exploration">Exploration</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Core_sample" title="Core sample">Core sampling</a></li> <li><a href="/wiki/Exploration_geophysics" title="Exploration geophysics">Geophysics</a></li> <li><a href="/wiki/Integrated_asset_modelling" title="Integrated asset modelling">Integrated asset modelling</a></li> <li><a href="/wiki/Petroleum_engineering" title="Petroleum engineering">Petroleum engineering</a> <ul><li><a href="/wiki/Reservoir_simulation" title="Reservoir simulation">Reservoir simulation</a></li> <li><a href="/wiki/Reservoir_modeling" title="Reservoir modeling">Reservoir modeling</a></li></ul></li> <li><a href="/wiki/Petroleum_geology" title="Petroleum geology">Petroleum geology</a></li> <li><a href="/wiki/Petrophysics" title="Petrophysics">Petrophysics</a></li> <li><a href="/wiki/Reflection_seismology" title="Reflection seismology">Reflection seismology</a> <ul><li><a href="/wiki/Seismic_inversion" title="Seismic inversion">Seismic inversion</a></li></ul></li> <li><a href="/wiki/Seismic_source" title="Seismic source">Seismic source</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Oil_well" title="Oil well">Drilling</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blowout_(well_drilling)" title="Blowout (well drilling)">Blowout</a></li> <li><a href="/wiki/Completion_(oil_and_gas_wells)" title="Completion (oil and gas wells)">Completion</a> <ul><li><a href="/wiki/Squeeze_job" title="Squeeze job">Squeeze job</a></li></ul></li> <li><a href="/wiki/Differential_sticking" title="Differential sticking">Differential sticking</a></li> <li><a href="/wiki/Directional_drilling" title="Directional drilling">Directional drilling</a> <ul><li><a href="/wiki/Geosteering" title="Geosteering">Geosteering</a></li></ul></li> <li><a href="/wiki/Drill_stem_test" title="Drill stem test">Drill stem test</a></li> <li><a href="/wiki/Drilling_engineering" title="Drilling engineering">Drilling engineering</a></li> <li><a href="/wiki/Drilling_fluid" title="Drilling fluid">Drilling fluid</a> <ul><li><a class="mw-selflink selflink">invasion</a></li></ul></li> <li><a href="/wiki/Lost_circulation" title="Lost circulation">Lost circulation</a></li> <li><a href="/wiki/Measurement_while_drilling" title="Measurement while drilling">Measurement</a></li> <li><a href="/wiki/Shale_oil_extraction" title="Shale oil extraction">Shale oil extraction</a> <ul><li><a href="/wiki/Fredrik_Ljungstr%C3%B6m#Shale_oil_extraction" title="Fredrik Ljungström">Ljungström method</a></li></ul></li> <li><a href="/wiki/Tracer_use_in_the_oil_industry" title="Tracer use in the oil industry">Tracers</a></li> <li><a href="/wiki/Underbalanced_drilling" title="Underbalanced drilling">Underbalanced drilling</a></li> <li><a href="/wiki/Well_logging" title="Well logging">Well logging</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Extraction_of_petroleum" title="Extraction of petroleum">Production</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Petroleum_fiscal_regime" title="Petroleum fiscal regime">Petroleum fiscal regime</a> <ul><li><a href="/wiki/Petroleum_licensing" title="Petroleum licensing">Concessions</a></li> <li><a href="/wiki/Production_sharing_agreement" title="Production sharing agreement">Production sharing agreements</a></li></ul></li> <li><a href="/wiki/Artificial_lift" title="Artificial lift">Artificial lift</a> <ul><li><a href="/wiki/Gas_lift" title="Gas lift">Gas lift</a></li> <li><a href="/wiki/Pumpjack" title="Pumpjack">Pumpjack</a></li> <li><a href="/wiki/Submersible_pump" title="Submersible pump">Submersible pump (ESP)</a></li></ul></li> <li><a href="/wiki/Downstream_(petroleum_industry)" title="Downstream (petroleum industry)">Downstream</a></li> <li><a href="/wiki/Enhanced_oil_recovery" title="Enhanced oil recovery">Enhanced oil recovery (EOR)</a> <ul><li><a href="/wiki/Gas_reinjection" title="Gas reinjection">Gas reinjection</a></li> <li><a href="/wiki/Steam_injection_(oil_industry)" title="Steam injection (oil industry)">Steam injection</a></li></ul></li> <li><a href="/wiki/Midstream" title="Midstream">Midstream</a></li> <li><a href="/wiki/Petroleum_product" title="Petroleum product">Petroleum product</a></li> <li><a href="/wiki/Pipeline" title="Pipeline">Pipeline</a></li> <li><a href="/wiki/Oil_refinery" title="Oil refinery">Refining</a></li> <li><a href="/wiki/Upstream_(petroleum_industry)" title="Upstream (petroleum industry)">Upstream</a></li> <li><a href="/wiki/Water_injection_(oil_production)" title="Water injection (oil production)">Water injection</a></li> <li><a href="/wiki/Well_intervention" title="Well intervention">Well intervention</a></li> <li><a href="/wiki/Christmas_tree_(oil_well)" title="Christmas tree (oil well)">XT</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/History_of_the_petroleum_industry" title="History of the petroleum industry">History</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1967_Oil_Embargo" title="1967 Oil Embargo">1967 Oil Embargo</a></li> <li><a href="/wiki/1973_oil_crisis" title="1973 oil crisis">1973 oil crisis</a></li> <li><a href="/wiki/1979_oil_crisis" title="1979 oil crisis">1979 oil crisis</a></li> <li><a href="/wiki/1980s_oil_glut" title="1980s oil glut">1980s oil glut</a></li> <li><a href="/wiki/1990_oil_price_shock" title="1990 oil price shock">1990 oil price shock</a></li> <li><a href="/wiki/2000s_energy_crisis" title="2000s energy crisis">2000s energy crisis</a></li> <li><a href="/wiki/2010s_oil_glut" title="2010s oil glut">2010s oil glut</a></li> <li><a href="/wiki/2020_Russia%E2%80%93Saudi_Arabia_oil_price_war" title="2020 Russia–Saudi Arabia oil price war">2020 Russia–Saudi Arabia oil price war</a></li> <li><a href="/wiki/Nationalization_of_oil_supplies" title="Nationalization of oil supplies">Nationalization</a></li> <li><a href="/wiki/Gas_Exporting_Countries_Forum" title="Gas Exporting Countries Forum">GECF</a></li> <li><a href="/wiki/OPEC" title="OPEC">OPEC</a></li> <li><a href="/wiki/Seven_Sisters_(oil_companies)" class="mw-redirect" title="Seven Sisters (oil companies)">Seven Sisters</a></li> <li><a href="/wiki/Standard_Oil" title="Standard Oil">Standard Oil</a></li> <li><a href="/wiki/History_of_the_petroleum_industry_in_Canada" title="History of the petroleum industry in Canada">Canada</a></li> <li><a href="/wiki/History_of_the_petroleum_industry_in_France" title="History of the petroleum industry in France">France</a></li> <li><a href="/wiki/History_of_the_oil_industry_in_India" title="History of the oil industry in India">India</a></li> <li><a href="/wiki/Petroleum_industry_in_Iraq" title="Petroleum industry in Iraq">Iraq</a></li> <li><a href="/wiki/History_of_the_petroleum_industry_in_Norway" title="History of the petroleum industry in Norway">Norway</a></li> <li><a href="/wiki/History_of_the_oil_industry_in_Saudi_Arabia" title="History of the oil industry in Saudi Arabia">Saudi Arabia</a></li> <li><a href="/wiki/History_of_the_petroleum_industry_in_the_United_States" title="History of the petroleum industry in the United States">United States</a></li> <li><a href="/wiki/History_of_the_Venezuelan_oil_industry" title="History of the Venezuelan oil industry">Venezuela</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Provinces<br />and fields</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_natural_gas_fields" title="List of natural gas fields">List of natural gas fields</a></li> <li><a href="/wiki/List_of_oil_fields" title="List of oil fields">List of oil fields</a></li> <li><a href="/wiki/Caspian_Sea" title="Caspian Sea">Caspian Sea</a></li> <li><a href="/wiki/East_Midlands_Oil_Province" title="East Midlands Oil Province">East Midlands Oil Province</a></li> <li><a href="/wiki/East_Texas_Oil_Field" title="East Texas Oil Field">East Texas</a></li> <li><a href="/wiki/Gulf_of_Mexico" title="Gulf of Mexico">Gulf of Mexico</a></li> <li><a href="/wiki/Niger_Delta#Nigerian_oil" title="Niger Delta">Niger Delta</a></li> <li><a href="/wiki/North_Sea_oil" title="North Sea oil">North Sea</a></li> <li><a href="/wiki/Permian_Basin_(North_America)" title="Permian Basin (North America)">Permian Basin</a></li> <li><a href="/wiki/Persian_Gulf" title="Persian Gulf">Persian Gulf</a></li> <li><a href="/wiki/Prudhoe_Bay_Oil_Field" title="Prudhoe Bay Oil Field">Prudhoe Bay</a></li> <li><a href="/wiki/Oil_reserves_in_Russia" title="Oil reserves in Russia">Russia</a></li> <li><a href="/wiki/Oil_reserves_in_Venezuela" title="Oil reserves in Venezuela">Venezuela</a></li> <li><a href="/wiki/Western_Canadian_Sedimentary_Basin" class="mw-redirect" title="Western Canadian Sedimentary Basin">Western Canadian Sedimentary Basin</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Other topics</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_abbreviations_in_oil_and_gas_exploration_and_production" title="List of abbreviations in oil and gas exploration and production">Abbreviations</a></li> <li>Classification <ul><li><a href="/wiki/Sweet_crude_oil" title="Sweet crude oil">sweet oil</a></li> <li><a href="/wiki/Sour_crude_oil" title="Sour crude oil">sour oil</a></li></ul></li> <li><a href="/wiki/Oil_shale_gas" title="Oil shale gas">Oil shale gas</a></li> <li><a href="/wiki/Orphan_wells" title="Orphan wells">Orphan wells</a></li> <li><a href="/wiki/Peak_oil" title="Peak oil">Peak oil</a> <ul><li><a href="/wiki/Fossil_fuel_phase-out" title="Fossil fuel phase-out">fossil fuel phase-out</a></li> <li><a href="/wiki/Predicting_the_timing_of_peak_oil" title="Predicting the timing of peak oil">timing</a></li></ul></li> <li><a href="/wiki/Petrocurrency" title="Petrocurrency">Petrocurrency</a></li> <li><a href="/wiki/Petrodollar_recycling" title="Petrodollar recycling">Petrodollar recycling</a></li> <li><a href="/wiki/Petrofiction" title="Petrofiction">Petrofiction</a></li> <li><a href="/wiki/Shale_band" title="Shale band">Shale band</a></li> <li><a href="/wiki/Shale_gas" title="Shale gas">Shale gas</a></li> <li><a href="/wiki/Swing_producer" title="Swing producer">Swing producer</a></li> <li><a href="/wiki/Unconventional_(oil_and_gas)_reservoir" title="Unconventional (oil and gas) reservoir">Unconventional (oil and gas) reservoir</a> <ul><li><a href="/wiki/Heavy_crude_oil" title="Heavy crude oil">heavy crude</a></li> <li><a href="/wiki/Oil_sands" title="Oil sands">oil sands</a></li> <li><a href="/wiki/Oil_shale" title="Oil shale">oil shale</a></li> <li><a href="/wiki/Tight_oil" title="Tight oil">tight oil</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Companies and<br />organisations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Major<br /><a href="/wiki/List_of_oil_exploration_and_production_companies" title="List of oil exploration and production companies">petroleum<br />companies</a></div></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left; font-weight:normal;"><a href="/wiki/Big_Oil" title="Big Oil">Supermajors</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BP" title="BP">BP</a></li> <li><a href="/wiki/Chevron_Corporation" title="Chevron Corporation">Chevron</a></li> <li><a href="/wiki/Eni" title="Eni">Eni</a></li> <li><a href="/wiki/ExxonMobil" title="ExxonMobil">ExxonMobil</a></li> <li><a href="/wiki/Shell_plc" title="Shell plc">Shell</a></li> <li><a href="/wiki/TotalEnergies" title="TotalEnergies">TotalEnergies</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left; font-weight:normal;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/National_oil_company" title="National oil company">National oil<br />companies</a></div></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abu_Dhabi_National_Oil_Company" title="Abu Dhabi National Oil Company">Abu Dhabi National Oil Company</a></li> <li><a href="/wiki/ANCAP_(Uruguay)" title="ANCAP (Uruguay)">ANCAP</a></li> <li><a href="/wiki/Bharat_Petroleum" title="Bharat Petroleum">Bharat Petroleum</a></li> <li><a href="/wiki/China_National_Offshore_Oil_Corporation" title="China National Offshore Oil Corporation">China National Offshore Oil Corporation</a></li> <li><a href="/wiki/China_National_Petroleum_Corporation" title="China National Petroleum Corporation">China National Petroleum Corporation</a></li> <li><a href="/wiki/Ecopetrol" title="Ecopetrol">Ecopetrol</a></li> <li><a href="/wiki/Equinor" title="Equinor">Equinor</a></li> <li><a href="/wiki/Gazprom" title="Gazprom">Gazprom</a></li> <li><a href="/wiki/Hindustan_Petroleum" title="Hindustan Petroleum">Hindustan Petroleum</a></li> <li><a href="/wiki/Indian_Oil_Corporation" title="Indian Oil Corporation">Indian Oil Corporation</a></li> <li><a href="/wiki/Iraq_National_Oil_Company" title="Iraq National Oil Company">Iraq National Oil Company</a></li> <li><a href="/wiki/KazMunayGas" title="KazMunayGas">KazMunayGas</a></li> <li><a href="/wiki/Kuwait_Petroleum_Corporation" title="Kuwait Petroleum Corporation">Kuwait Petroleum Corporation</a></li> <li><a href="/wiki/Grupa_Lotos" title="Grupa Lotos">Lotos</a></li> <li><a href="/wiki/Naftogaz" title="Naftogaz">Naftogaz</a></li> <li><a href="/wiki/National_Iranian_Oil_Company" title="National Iranian Oil Company">National Iranian Oil Company</a></li> <li><a href="/wiki/National_Iranian_South_Oil_Company" title="National Iranian South Oil Company">National Iranian South Oil Company</a></li> <li><a href="/wiki/NNPC_Limited" title="NNPC Limited">NNPC Limited</a></li> <li><a href="/wiki/Oil_%26_Gas_Development_Company" title="Oil & Gas Development Company">Oil & Gas Development Company</a></li> <li><a href="/wiki/Oil_and_Natural_Gas_Corporation" title="Oil and Natural Gas Corporation">Oil and Natural Gas Corporation</a></li> <li><a href="/wiki/Orlen" title="Orlen">Orlen</a></li> <li><a href="/wiki/PDVSA" title="PDVSA">PDVSA</a></li> <li><a href="/wiki/Pemex" title="Pemex">Pemex</a></li> <li><a href="/wiki/Pertamina" title="Pertamina">Pertamina</a></li> <li><a href="/wiki/Petrobangla" title="Petrobangla">Petrobangla</a></li> <li><a href="/wiki/Petrobras" title="Petrobras">Petrobras</a></li> <li><a href="/wiki/PetroChina" title="PetroChina">PetroChina</a></li> <li><a href="/wiki/Petronas" title="Petronas">Petronas</a></li> <li><a href="/wiki/Petrovietnam" title="Petrovietnam">Petrovietnam</a></li> <li><a href="/wiki/PTT_Public_Company_Limited" title="PTT Public Company Limited">PTT Public Company Limited</a></li> <li><a href="/wiki/QatarEnergy" title="QatarEnergy">QatarEnergy</a></li> <li><a href="/wiki/Rosneft" title="Rosneft">Rosneft</a></li> <li><a href="/wiki/Saudi_Aramco" title="Saudi Aramco">Saudi Aramco</a></li> <li><a href="/wiki/Sinopec" title="Sinopec">Sinopec</a></li> <li><a href="/wiki/SOCAR" title="SOCAR">SOCAR</a></li> <li><a href="/wiki/Sonangol_Group" title="Sonangol Group">Sonangol</a></li> <li><a href="/wiki/Sonatrach" title="Sonatrach">Sonatrach</a></li> <li><a href="/wiki/TPAO" title="TPAO">TPAO</a></li> <li><a href="/wiki/YPF" title="YPF">YPF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left; font-weight:normal;"><a href="/wiki/Energy_trading" class="mw-redirect" title="Energy trading">Energy trading</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Enron" title="Enron">Enron</a></li> <li><a href="/wiki/Glencore" title="Glencore">Glencore</a></li> <li><a href="/wiki/Gunvor" title="Gunvor">Gunvor</a></li> <li><a href="/wiki/Mercuria" title="Mercuria">Mercuria</a></li> <li><a href="/wiki/Naftiran_Intertrade" title="Naftiran Intertrade">Naftiran Intertrade</a></li> <li><a href="/wiki/Trafigura" title="Trafigura">Trafigura</a></li> <li><a href="/wiki/Vitol" title="Vitol">Vitol</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left; font-weight:normal;">Others</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/APA_Corporation" title="APA Corporation">APA Corporation</a></li> <li><a href="/wiki/Cenovus_Energy" title="Cenovus Energy">Cenovus Energy</a></li> <li><a href="/wiki/Cepsa" title="Cepsa">Cepsa</a></li> <li><a href="/wiki/ConocoPhillips" title="ConocoPhillips">ConocoPhillips</a></li> <li><a href="/wiki/Devon_Energy" title="Devon Energy">Devon Energy</a></li> <li><a href="/wiki/Eneos_Holdings" title="Eneos Holdings">Eneos Holdings</a></li> <li><a href="/wiki/Galp_Energia" title="Galp Energia">Galp Energia</a></li> <li><a href="/wiki/Hess_Corporation" title="Hess Corporation">Hess Corporation</a></li> <li><a href="/wiki/Husky_Energy" title="Husky Energy">Husky Energy</a></li> <li><a href="/wiki/Imperial_Oil" title="Imperial Oil">Imperial Oil</a></li> <li><a href="/wiki/Lukoil" title="Lukoil">Lukoil</a></li> <li><a href="/wiki/Marathon_Oil" title="Marathon Oil">Marathon Oil</a></li> <li><a href="/wiki/Marathon_Petroleum" title="Marathon Petroleum">Marathon Petroleum</a></li> <li><a href="/wiki/Occidental_Petroleum" title="Occidental Petroleum">Occidental Petroleum</a></li> <li><a href="/wiki/OMV" title="OMV">OMV</a></li> <li><a href="/wiki/Phillips_66" title="Phillips 66">Phillips 66</a></li> <li><a href="/wiki/Port_Harcourt_Refining_Company" title="Port Harcourt Refining Company">Port Harcourt Refining Company</a></li> <li><a href="/wiki/Reliance_Industries" title="Reliance Industries">Reliance Industries</a></li> <li><a href="/wiki/Repsol" title="Repsol">Repsol</a></li> <li><a href="/wiki/Suncor_Energy" title="Suncor Energy">Suncor Energy</a></li> <li><a href="/wiki/Sunoco" title="Sunoco">Sunoco</a></li> <li><a href="/wiki/Surgutneftegas" title="Surgutneftegas">Surgutneftegas</a></li> <li><a href="/wiki/TechnipFMC" title="TechnipFMC">TechnipFMC</a></li> <li><a href="/wiki/TNK-BP" title="TNK-BP">TNK-BP</a></li> <li><a href="/wiki/Tullow_Oil" title="Tullow Oil">Tullow Oil</a></li> <li><a href="/wiki/T%C3%BCpra%C5%9F" title="Tüpraş">Tüpraş</a></li> <li><a href="/wiki/Valero_Energy" title="Valero Energy">Valero Energy</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Major<br /><a href="/wiki/List_of_oilfield_service_companies" title="List of oilfield service companies">services<br />companies</a></div></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amec_Foster_Wheeler" title="Amec Foster Wheeler">Amec Foster Wheeler</a></li> <li><a href="/wiki/Baker_Hughes" title="Baker Hughes">Baker Hughes</a></li> <li><a href="/wiki/Cameron_International" title="Cameron International">Cameron International</a></li> <li><a href="/wiki/CGG_(company)" class="mw-redirect" title="CGG (company)">CGG</a></li> <li><a href="/wiki/CH2M" title="CH2M">CH2M</a></li> <li><a href="/wiki/Chicago_Bridge_%26_Iron_Company" title="Chicago Bridge & Iron Company">Chicago Bridge & Iron Company</a></li> <li><a href="/wiki/China_Oilfield_Services" title="China Oilfield Services">China Oilfield Services</a></li> <li><a href="/wiki/Enbridge" title="Enbridge">Enbridge</a></li> <li><a href="/wiki/GE_Power" title="GE Power">GE Power</a></li> <li><a href="/wiki/Halliburton" title="Halliburton">Halliburton</a></li> <li><a href="/wiki/Nabors_Industries" title="Nabors Industries">Nabors Industries</a></li> <li><a href="/wiki/Naftiran_Intertrade" title="Naftiran Intertrade">Naftiran Intertrade</a></li> <li><a href="/wiki/NOV_Inc." title="NOV Inc.">NOV Inc.</a></li> <li><a href="/wiki/Petrofac" title="Petrofac">Petrofac</a></li> <li><a href="/wiki/Saipem" title="Saipem">Saipem</a></li> <li><a href="/wiki/Schlumberger" title="Schlumberger">Schlumberger</a></li> <li><a href="/wiki/Snam" title="Snam">Snam</a></li> <li><a href="/wiki/Subsea_7" title="Subsea 7">Subsea 7</a></li> <li><a href="/wiki/TC_Energy" title="TC Energy">TC Energy</a></li> <li><a href="/wiki/Transocean" title="Transocean">Transocean</a></li> <li><a href="/wiki/Valaris_Limited" title="Valaris Limited">Valaris Limited</a></li> <li><a href="/wiki/Weatherford_International" title="Weatherford International">Weatherford International</a></li> <li><a href="/wiki/John_Wood_Group" title="John Wood Group">John Wood Group</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Others</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/American_Petroleum_Institute" title="American Petroleum Institute">American Petroleum Institute</a></li> <li><a href="/wiki/Canadian_petroleum_companies" title="Canadian petroleum companies">Canadian petroleum companies</a></li> <li><a href="/wiki/Intercontinental_Exchange_Futures" title="Intercontinental Exchange Futures">Intercontinental Exchange Futures</a></li> <li><a href="/wiki/International_Association_of_Oil_%26_Gas_Producers" title="International Association of Oil & Gas Producers">International Association of Oil & Gas Producers</a></li> <li><a href="/wiki/International_Energy_Agency" title="International Energy Agency">International Energy Agency</a></li> <li><a href="/wiki/Society_of_Petroleum_Engineers" title="Society of Petroleum Engineers">Society of Petroleum Engineers</a></li> <li><a href="/wiki/World_Petroleum_Council" class="mw-redirect" title="World Petroleum Council">World Petroleum Council</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="font-weight:bold;"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Petroleum_industry" title="Category:Petroleum industry">Category</a></li></ul> </div></td></tr></tbody></table></div> <p><br /> </p> <style data-mw-deduplicate="TemplateStyles:r1012311289">.mw-parser-output .asbox{position:relative;overflow:hidden}.mw-parser-output .asbox table{background:transparent}.mw-parser-output .asbox p{margin:0}.mw-parser-output .asbox p+p{margin-top:0.25em}.mw-parser-output .asbox-body{font-style:italic}.mw-parser-output .asbox-note{font-size:smaller}.mw-parser-output .asbox .navbar{position:absolute;top:-0.75em;right:1em;display:none}</style><div role="note" class="metadata plainlinks asbox stub"><table role="presentation"><tbody><tr class="noresize"><td><span typeof="mw:File"><a href="/wiki/File:Oil_well_icon.svg" class="mw-file-description"><img alt="Stub icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/40px-Oil_well_icon.svg.png" decoding="async" width="40" height="36" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/60px-Oil_well_icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/80px-Oil_well_icon.svg.png 2x" data-file-width="136" data-file-height="124" /></a></span></td><td><p class="asbox-body">This article related to natural gas, petroleum or the petroleum industry is a <a href="/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a>. You can help Wikipedia by <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Drilling_fluid_invasion&action=edit">expanding it</a>.</p></td></tr></tbody></table><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Petroleum-stub" title="Template:Petroleum-stub"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Petroleum-stub" title="Template talk:Petroleum-stub"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Petroleum-stub" title="Special:EditPage/Template:Petroleum-stub"><abbr title="Edit this template">e</abbr></a></li></ul></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Drilling_fluid_invasion&oldid=1194565590">https://en.wikipedia.org/w/index.php?title=Drilling_fluid_invasion&oldid=1194565590</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Drilling_fluid" title="Category:Drilling fluid">Drilling fluid</a></li><li><a href="/wiki/Category:Well_logging" title="Category:Well logging">Well logging</a></li><li><a href="/wiki/Category:Petroleum_stubs" title="Category:Petroleum stubs">Petroleum stubs</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Articles_lacking_in-text_citations_from_January_2024" title="Category:Articles lacking in-text citations from January 2024">Articles lacking in-text citations from January 2024</a></li><li><a href="/wiki/Category:All_articles_lacking_in-text_citations" title="Category:All articles lacking in-text citations">All articles lacking in-text citations</a></li><li><a href="/wiki/Category:All_stub_articles" title="Category:All stub articles">All stub articles</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 9 January 2024, at 17:01<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. By using this site, you agree to the <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use" class="extiw" title="foundation:Special:MyLanguage/Policy:Terms of Use">Terms of Use</a> and <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy" class="extiw" title="foundation:Special:MyLanguage/Policy:Privacy policy">Privacy Policy</a>. Wikipedia® is a registered trademark of the <a rel="nofollow" class="external text" href="https://wikimediafoundation.org/">Wikimedia Foundation, Inc.</a>, a non-profit organization.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=Drilling_fluid_invasion&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/w/resources/assets/poweredby_mediawiki.svg" alt="Powered by MediaWiki" width="88" height="31" loading="lazy"></a></li> </ul> </footer> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-55db797859-t68l9","wgBackendResponseTime":139,"wgPageParseReport":{"limitreport":{"cputime":"0.230","walltime":"0.290","ppvisitednodes":{"value":499,"limit":1000000},"postexpandincludesize":{"value":67610,"limit":2097152},"templateargumentsize":{"value":1199,"limit":2097152},"expansiondepth":{"value":13,"limit":100},"expensivefunctioncount":{"value":2,"limit":500},"unstrip-depth":{"value":0,"limit":20},"unstrip-size":{"value":16224,"limit":5000000},"entityaccesscount":{"value":0,"limit":400},"timingprofile":["100.00% 237.934 1 -total"," 39.96% 95.067 4 Template:Navbox"," 37.10% 88.284 1 Template:Petroleum_industry"," 30.65% 72.923 1 Template:Cite_book"," 26.30% 62.586 1 Template:No_footnotes"," 18.99% 45.195 1 Template:Ambox"," 5.80% 13.809 1 Template:Petroleum-stub"," 5.13% 12.201 1 Template:Asbox"," 2.85% 6.783 1 Template:Icon"," 1.44% 3.431 2 Template:Yesno-no"]},"scribunto":{"limitreport-timeusage":{"value":"0.152","limit":"10.000"},"limitreport-memusage":{"value":3959279,"limit":52428800}},"cachereport":{"origin":"mw-web.codfw.main-8f7b48fdd-jnlsd","timestamp":"20241217143354","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"Drilling fluid invasion","url":"https:\/\/en.wikipedia.org\/wiki\/Drilling_fluid_invasion","sameAs":"http:\/\/www.wikidata.org\/entity\/Q5307647","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q5307647","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2006-12-02T18:43:12Z","dateModified":"2024-01-09T17:01:09Z"}</script> </body> </html>