A study on the identification technique of high- amplitude "bright spots" in the Huagang Formation of the X gas field in the Xihu Depression

A study on the identification technique of high- amplitude "bright spots" in the Huagang Formation of the X gas field in the Xihu Depression | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article A study on the identification technique of high- amplitude "bright spots" in the Huagang Formation of the X gas field in the Xihu Depression Yangsen Li This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3923722/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Due to the small number of exploration wells and similar AVO (Amplitude Versus Offset) types of different fluids in the study area, the use of conventional P (fitting intercept), G (fitting gradient), P×G, P + G and other hydrocarbon detection attributes can no longer effectively identify the fluid properties of the study area, and it is urgent to find a hydrocarbon detection method suitable for the effective reservoirs in the area. Through the analysis and statistics of single-point pre-stack AVO of the drilled wells, the intercept and gradient intersection template for fluid identification are established. The gas-bearing sandstones show obvious AVO characteristics of class II ~ III, and different fluid types are basically distinguishable in the intersection template. We propose the scalar Poisson ratio attribute by borrowing the idea of the study of Poisson impedance, which can enhance the sensitivity of the identification of gas-bearing in the study area, and it can be used in the gas-bearing in the Xihu Depression. Good application results have been achieved in the hydrocarbon detection in the middle and deep layers, and progress has been made to improve the reliability of hydrocarbon detection in the reservoirs in the less well area. Xihu Depression bright spot AVO analysis hydrocarbon detection scalar Poisson's ratio Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-3923722","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":271449645,"identity":"e3b3befa-15ef-44ea-acff-e677b07e8b5c","order_by":0,"name":"Yangsen Li","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAuklEQVRIiWNgGAWjYBACPmYg8aGCFC1sQC2MM86QpAWImXnbSNLCzmP8mXeeXR4/e/MDhh8V2xj4ZzcQchiPmeTcbcnFkj3HDBh7ztxmkLhzgLAWhrfbDiRuuJHDwMzYdpvBQCKBoBbjD7xzSNRiIMnbQJoWtjLJGceSE2cC/XIQ6BceiRsEtPDzH9784UONXWI/e/PDBz8qbsvxzyCghYGBwwDOPADEPITUAwH7AyIUjYJRMApGwYgGAIuAPQI8NTgHAAAAAElFTkSuQmCC","orcid":"","institution":"","correspondingAuthor":true,"prefix":"","firstName":"Yangsen","middleName":"","lastName":"Li","suffix":""}],"badges":[],"createdAt":"2024-02-03 11:29:11","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-3923722/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-3923722/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":55441628,"identity":"b3c3f508-20ce-4d75-b5d6-b5775aab677b","added_by":"auto","created_at":"2024-04-27 21:33:03","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1846258,"visible":true,"origin":"","legend":"","description":"","filename":"manuscriptorg.pdf","url":"https://assets-eu.researchsquare.com/files/rs-3923722/v1_covered_d1a77746-031c-49e4-87b3-a7592aa8e626.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"A study on the identification technique of high- amplitude \"bright spots\" in the Huagang Formation of the X gas field in the Xihu Depression","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Xihu Depression, bright spot, AVO analysis, hydrocarbon detection, scalar Poisson's ratio","lastPublishedDoi":"10.21203/rs.3.rs-3923722/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-3923722/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eDue to the small number of exploration wells and similar AVO (Amplitude Versus Offset) types of different fluids in the study area, the use of conventional P (fitting intercept), G (fitting gradient), P\u0026times;G, P\u0026thinsp;+\u0026thinsp;G and other hydrocarbon detection attributes can no longer effectively identify the fluid properties of the study area, and it is urgent to find a hydrocarbon detection method suitable for the effective reservoirs in the area. 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