Identification Method of Fractures and Vugs in Dolomite Reservoirs Based on Conventional Logging Curves

Identification Method of Fractures and Vugs in Dolomite Reservoirs Based on Conventional Logging Curves | 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 Article Identification Method of Fractures and Vugs in Dolomite Reservoirs Based on Conventional Logging Curves Dahai Wang, Jie Tian, Haibo Liao, Lichi Ma, Keke Wang, Wenjie Li, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6148280/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 The dolomite reservoir of the Majiagou formation in the southeast of the Ordos Basin constitutes an important oil and gas reservoir. The development of fractures and vugs directly influences the reservoir's permeability and hydrocarbon storage capacity, making precise fracture-vug identification crucial for effective reservoir exploitation. Given the limitations of traditional fracture-vug recognition methods, the work adopted the R/S (Rescaled Range) analysis based on fractal theory and Newton's second-order difference method. The results are as follows. ( 1 ) The conventional logging curve was processed by R/S analysis. The concave interval reflected the developmental position of fractures and vugs. The greater the H , the more developed the fracture. Besides, corresponding identification standards were established. ( 2 ) Based on Newton's second-order difference, K was calculated. Rangeability was quantified in the concave interval of the curve to identify the natural fracture-vug development area. The accuracy and reliability of the method were verified by comparing the electro-imaging diagrams. ( 3 ) The differences and reasons for the response characteristics of K of different logging curves were analyzed to establish the identification plates of fractures and vugs development areas. This work provides a new method for the fracture-vug identification of Ordos Basin and other similar reservoirs, guiding the reservoir research and decision-making of oil and gas exploration and development. Earth and environmental sciences/Solid earth sciences/Geophysics Physical sciences/Energy science and technology/Fossil fuels/Crude oil Physical sciences/Energy science and technology/Fossil fuels/Natural gas Ordos Basin Dolomite reservoir Fracture identification Conventional logging Rescaled range analysis 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-6148280","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":436388823,"identity":"04fa09a9-d596-40bc-87bf-518c898785a7","order_by":0,"name":"Dahai Wang","email":"","orcid":"","institution":"Chengdu University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Dahai","middleName":"","lastName":"Wang","suffix":""},{"id":436388824,"identity":"9c5491e8-a0ca-4836-bd94-b5e34154d7e2","order_by":1,"name":"Jie 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Corporation","correspondingAuthor":false,"prefix":"","firstName":"Tao","middleName":"","lastName":"Zhang","suffix":""},{"id":436388830,"identity":"107e8951-e2ed-4b2e-ac97-68dee3494cb6","order_by":7,"name":"Jian Bai","email":"","orcid":"","institution":"SINOPEC North China Company","correspondingAuthor":false,"prefix":"","firstName":"Jian","middleName":"","lastName":"Bai","suffix":""}],"badges":[],"createdAt":"2025-03-03 17:23:30","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6148280/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6148280/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":105181158,"identity":"3f8680e6-325a-4575-bea9-280e3d3c6702","added_by":"auto","created_at":"2026-03-23 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Curves","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":"Ordos Basin, Dolomite reservoir, Fracture identification, Conventional logging, Rescaled range analysis","lastPublishedDoi":"10.21203/rs.3.rs-6148280/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6148280/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe dolomite reservoir of the Majiagou formation in the southeast of the Ordos Basin constitutes an important oil and gas reservoir. The development of fractures and vugs directly influences the reservoir's permeability and hydrocarbon storage capacity, making precise fracture-vug identification crucial for effective reservoir exploitation. Given the limitations of traditional fracture-vug recognition methods, the work adopted the R/S (Rescaled Range) analysis based on fractal theory and Newton's second-order difference method. The results are as follows. (\u003cspan citationid=\"CR1\" class=\"CitationRef\"\u003e1\u003c/span\u003e) The conventional logging curve was processed by R/S analysis. The concave interval reflected the developmental position of fractures and vugs. The greater the \u003cem\u003eH\u003c/em\u003e, the more developed the fracture. Besides, corresponding identification standards were established. (\u003cspan citationid=\"CR2\" class=\"CitationRef\"\u003e2\u003c/span\u003e) Based on Newton's second-order difference, \u003cem\u003eK\u003c/em\u003e was calculated. Rangeability was quantified in the concave interval of the curve to identify the natural fracture-vug development area. The accuracy and reliability of the method were verified by comparing the electro-imaging diagrams. (\u003cspan citationid=\"CR3\" class=\"CitationRef\"\u003e3\u003c/span\u003e) The differences and reasons for the response characteristics of \u003cem\u003eK\u003c/em\u003e of different logging curves were analyzed to establish the identification plates of fractures and vugs development areas. This work provides a new method for the fracture-vug identification of Ordos Basin and other similar reservoirs, guiding the reservoir research and decision-making of oil and gas exploration and development.\u003c/p\u003e","manuscriptTitle":"Identification Method of Fractures and Vugs in Dolomite Reservoirs Based on Conventional Logging Curves","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-04-03 17:44:11","doi":"10.21203/rs.3.rs-6148280/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","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}}],"origin":"","ownerIdentity":"97cded53-6459-473c-86ee-99c5b0a8acc5","owner":[],"postedDate":"April 3rd, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":46463589,"name":"Earth and environmental sciences/Solid earth sciences/Geophysics"},{"id":46463590,"name":"Physical sciences/Energy science and technology/Fossil fuels/Crude oil"},{"id":46463591,"name":"Physical sciences/Energy science and technology/Fossil fuels/Natural gas"}],"tags":[],"updatedAt":"2026-03-23T07:27:45+00:00","versionOfRecord":[],"versionCreatedAt":"2025-04-03 17:44:11","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6148280","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6148280","identity":"rs-6148280","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}