Mechanism and Feasibility Analysis of Gas Injection for Enhanced Recovery in Fractured Tight Sandstone Gas Reservoirs: A Case Study of the Keshen 24 Gas Reservoir

Mechanism and Feasibility Analysis of Gas Injection for Enhanced Recovery in Fractured Tight Sandstone Gas Reservoirs: A Case Study of the Keshen 24 Gas Reservoir | 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 Mechanism and Feasibility Analysis of Gas Injection for Enhanced Recovery in Fractured Tight Sandstone Gas Reservoirs: A Case Study of the Keshen 24 Gas Reservoir Rui Huang, Jun Deng, Songbai Zhu, Tingya Zhou, Xing Chen, Yanli Wang, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8403233/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 Keshen 24 gas reservoir is a typical fractured tight sandstone gas reservoir currently confronting challenges such as rapid water invasion, limited efficacy of conventional water drainage techniques, and escalating water encroachment, necessitating the exploration of effective enhanced recovery technologies. To address the geological and development conflicts in this reservoir, a systematic feasibility study on gas injection for enhanced recovery was conducted through mechanism investigation, theoretical calculation, and field testing. The research clarifies three core mechanisms of gas injection: replenishing formation energy, forming a gas barrier to suppress water influx, and mitigating water-blocking effects. The pressure gradient of nitrogen in the wellbore and a reasonable injection pressure window were determined through calculation. Key gas injection parameters were predicted by establishing a dual-porosity material balance model. Finally, a pilot well was selected for a field injection test, which practically validated the technical feasibility. The study demonstrates that gas injection is an effective and viable technology for enhancing recovery in the Keshen 24 gas reservoir and similar fractured tight sandstone gas reservoirs. Physical sciences/Energy science and technology Physical sciences/Engineering Earth and environmental sciences/Solid earth sciences Keshen Gas Field Gas Injection for Enhanced Recovery Feasibility Analysis Gas Injection Mechanism 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-8403233","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":565606280,"identity":"8e59b89f-efd1-4070-9db0-49ec938d5f4f","order_by":0,"name":"Rui 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