A novel approach to the comprehensive evaluation of geology- engineering dual sweet spots in tight gas reservoirs in the LX area of China

A novel approach to the comprehensive evaluation of geology- engineering dual sweet spots in tight gas reservoirs in the LX area of China | 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 novel approach to the comprehensive evaluation of geology- engineering dual sweet spots in tight gas reservoirs in the LX area of China Yi Liu, Shanyong Liu, Yishan Lou, Biao Yin, Yan Zhang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4716218/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 LX tight gas reservoir displays significant heterogeneity, with a lack of alignment between engineering treatment and geological evaluation, leading to an unsatisfactory development outcome. Focusing on the Shihezi Formation of LX, a new comprehensive evaluation method is proposed for identifying sweet spots, taking into consideration both geological and engineering factors. The objective function utilized is post-frac production, and the grey correlation method was employed to quantitatively characterize the weight coefficients of geological and engineering parameters. The dual sweet spots index F was obtained through a normalized process. Utilizing the Petrel integrated exploration and development platform, the dual sweet spots index was incorporated into the geological model using coarse-interpolation. Subsequently, a dual sweet spots evaluation model was established to enhance the overall assessment process. The findings indicate the following: ( 1 ) There is a strong correlation between open flow production and the F-value, and the model's predicted value closely aligns with the actual value. ( 2 ) A section with an F-value greater than 0.5 is identified as the optimal sweet spot, prioritizing development in this area. Sections with F-values within the range of 0.3 to 0.5 may be considered for fracturing but are not the primary choice. Sections with an F-value below 0.3 are deemed inefficient areas. ( 3 ) Based on the dual sweet spots evaluation model, it is recommended to focus on single layers He2, He5, and He6 in the LX area due to their superior quality compared to other layers. The research results offer crucial technical support for assessing fracability in this region, and hold significant importance for the selection of fracturing wells and the optimization of frac design. Tight gas reservoir Geological and engineering integration Dual sweet spots index Grey correlation method Geological and engineering evaluation method 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-4716218","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":327461749,"identity":"dcf9192e-6dcf-4427-b08e-1ec54fd638eb","order_by":0,"name":"Yi Liu","email":"","orcid":"","institution":"Yangtze University","correspondingAuthor":false,"prefix":"","firstName":"Yi","middleName":"","lastName":"Liu","suffix":""},{"id":327461752,"identity":"bd4bdcef-261a-481d-ba37-d01463d10a9c","order_by":1,"name":"Shanyong Liu","email":"data:image/png;base64,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","orcid":"","institution":"Yangtze University","correspondingAuthor":true,"prefix":"","firstName":"Shanyong","middleName":"","lastName":"Liu","suffix":""},{"id":327461753,"identity":"1634617b-c2e3-4234-99b3-f1b08355e5f0","order_by":2,"name":"Yishan Lou","email":"","orcid":"","institution":"Yangtze University","correspondingAuthor":false,"prefix":"","firstName":"Yishan","middleName":"","lastName":"Lou","suffix":""},{"id":327461754,"identity":"082e65dc-62f4-404f-bc90-880544d67bda","order_by":3,"name":"Biao Yin","email":"","orcid":"","institution":"Yangtze University","correspondingAuthor":false,"prefix":"","firstName":"Biao","middleName":"","lastName":"Yin","suffix":""},{"id":327461755,"identity":"bfe71a85-50a7-4b82-80da-8ec7d408a920","order_by":4,"name":"Yan Zhang","email":"","orcid":"","institution":"Yangtze University","correspondingAuthor":false,"prefix":"","firstName":"Yan","middleName":"","lastName":"Zhang","suffix":""}],"badges":[],"createdAt":"2024-07-10 07:09:54","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4716218/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4716218/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":63752100,"identity":"73b548fa-c927-4961-b4fc-8de0b8a4ea8b","added_by":"auto","created_at":"2024-09-02 03:59:47","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":923300,"visible":true,"origin":"","legend":"","description":"","filename":"20240709AnovelapproachtothecomprehensiveevaluationofgeologyengineeringdualsweetspotsintightgasreservoirsintheLXareaofChina.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4716218/v1_covered_a3a7c683-7e5f-4803-a665-774f1e5e1eb3.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"A novel approach to the comprehensive evaluation of geology- engineering dual sweet spots in tight gas reservoirs in the LX area of China","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":"Tight gas reservoir, Geological and engineering integration, Dual sweet spots index, Grey correlation method, Geological and engineering evaluation method","lastPublishedDoi":"10.21203/rs.3.rs-4716218/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4716218/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe LX tight gas reservoir displays significant heterogeneity, with a lack of alignment between engineering treatment and geological evaluation, leading to an unsatisfactory development outcome. Focusing on the Shihezi Formation of LX, a new comprehensive evaluation method is proposed for identifying sweet spots, taking into consideration both geological and engineering factors. The objective function utilized is post-frac production, and the grey correlation method was employed to quantitatively characterize the weight coefficients of geological and engineering parameters. The dual sweet spots index F was obtained through a normalized process. Utilizing the Petrel integrated exploration and development platform, the dual sweet spots index was incorporated into the geological model using coarse-interpolation. Subsequently, a dual sweet spots evaluation model was established to enhance the overall assessment process. The findings indicate the following: (\u003cspan citationid=\"CR1\" class=\"CitationRef\"\u003e1\u003c/span\u003e) There is a strong correlation between open flow production and the F-value, and the model's predicted value closely aligns with the actual value. (\u003cspan citationid=\"CR2\" class=\"CitationRef\"\u003e2\u003c/span\u003e) A section with an F-value greater than 0.5 is identified as the optimal sweet spot, prioritizing development in this area. Sections with F-values within the range of 0.3 to 0.5 may be considered for fracturing but are not the primary choice. Sections with an F-value below 0.3 are deemed inefficient areas. (\u003cspan citationid=\"CR3\" class=\"CitationRef\"\u003e3\u003c/span\u003e) Based on the dual sweet spots evaluation model, it is recommended to focus on single layers He2, He5, and He6 in the LX area due to their superior quality compared to other layers. The research results offer crucial technical support for assessing fracability in this region, and hold significant importance for the selection of fracturing wells and the optimization of frac design.\u003c/p\u003e","manuscriptTitle":"A novel approach to the comprehensive evaluation of geology- engineering dual sweet spots in tight gas reservoirs in the LX area of China","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-08-08 19:58:54","doi":"10.21203/rs.3.rs-4716218/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":"be1566e6-9e08-45c7-a02b-077d065da15e","owner":[],"postedDate":"August 8th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-09-12T05:21:18+00:00","versionOfRecord":[],"versionCreatedAt":"2024-08-08 19:58:54","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4716218","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4716218","identity":"rs-4716218","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}