Theoretical investigation of threshold pressure gradient in hydrate-bearing clayey-silty sediments under combined stress and local thermal stimulation conditions

Theoretical investigation of threshold pressure gradient in hydrate-bearing clayey-silty sediments under combined stress and local thermal stimulation conditions | 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 Theoretical investigation of threshold pressure gradient in hydrate-bearing clayey-silty sediments under combined stress and local thermal stimulation conditions Jiangtao Qu, Gang Lei, Tianle Liu, Jiaxin Sun, Shaojun Zheng, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3518703/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 01 Jul, 2024 Read the published version in Gas Science and Engineering → Version 1 posted You are reading this latest preprint version Abstract Due to the characteristics of smaller grain size and higher clay mineral content, a threshold pressure gradient (TPG) exists in multi-phase flow within hydrate-bearing clayey-silty sediments (HBCSS), which significantly affects the hydrate production. However, the dissociation of hydrates can result in cementation loss, changes in effective stress, and variation in local temperature. As a result, the TPG in HBCSS differs from that of conventional geotechnical materials. Until now, the understanding of TPG in HBCSS with complex pore structures and hydrate distribution is unclear. In this study, we have developed a theoretical TPG model for HBCSS that takes various factors into account, such as effective stress, temperature increase, pore structures, hydrate saturation, and growth patterns. The proposed TPG model for HBCSS has been thoroughly validated using available experimental data. Additionally, we conducted a parameter sensitivity analysis based on this derived model, revealing a positive correlation between TPG and both effective stress and temperature increase. Furthermore, while TPG generally increases with higher hydrate saturation when other parameters are held constant, the relationship between TPG and hydrate saturation is non-monotonic. This observation suggests that TPG is influenced not only by hydrate saturation but also by other factors, including hydrate growth patterns and pore structures. The findings of this study establish a theoretical foundation for characterizing the nonlinear flow behavior during hydrate exploitation. Hydrate-bearing clayey-silty sediments Threshold pressure gradient Effective stress Temperature increase Theoretical model Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 01 Jul, 2024 Read the published version in Gas Science and Engineering → 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-3518703","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":244845841,"identity":"de5f9cf4-9c5d-462d-9b22-a81ebba947ea","order_by":0,"name":"Jiangtao Qu","email":"","orcid":"","institution":"National Center for International Research on Deep Earth Drilling and Resource Development, Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan, 430074, 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However, the dissociation of hydrates can result in cementation loss, changes in effective stress, and variation in local temperature. As a result, the TPG in HBCSS differs from that of conventional geotechnical materials. Until now, the understanding of TPG in HBCSS with complex pore structures and hydrate distribution is unclear. In this study, we have developed a theoretical TPG model for HBCSS that takes various factors into account, such as effective stress, temperature increase, pore structures, hydrate saturation, and growth patterns. The proposed TPG model for HBCSS has been thoroughly validated using available experimental data. Additionally, we conducted a parameter sensitivity analysis based on this derived model, revealing a positive correlation between TPG and both effective stress and temperature increase. Furthermore, while TPG generally increases with higher hydrate saturation when other parameters are held constant, the relationship between TPG and hydrate saturation is non-monotonic. This observation suggests that TPG is influenced not only by hydrate saturation but also by other factors, including hydrate growth patterns and pore structures. The findings of this study establish a theoretical foundation for characterizing the nonlinear flow behavior during hydrate exploitation.\u003c/p\u003e","manuscriptTitle":"Theoretical investigation of threshold pressure gradient in hydrate-bearing clayey-silty sediments under combined stress and local thermal stimulation conditions","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2023-11-03 06:41:14","doi":"10.21203/rs.3.rs-3518703/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":"e6bb8070-875d-432d-8a52-e8c539387003","owner":[],"postedDate":"November 3rd, 2023","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2024-07-31T19:20:39+00:00","versionOfRecord":{"articleIdentity":"rs-3518703","link":"https://doi.org/10.1016/j.jgsce.2024.205418","journal":{"identity":"gas-science-and-engineering","isVorOnly":true,"title":"Gas Science and Engineering"},"publishedOn":"2024-07-01 19:20:38","publishedOnDateReadable":"July 1st, 2024"},"versionCreatedAt":"2023-11-03 06:41:14","video":"","vorDoi":"10.1016/j.jgsce.2024.205418","vorDoiUrl":"https://doi.org/10.1016/j.jgsce.2024.205418","workflowStages":[]},"version":"v1","identity":"rs-3518703","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3518703","identity":"rs-3518703","version":["v1"]},"buildId":"WrCJVZZCHTDjtuVLN7oU0","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}