WITHDRAWN: Long-distance migration assisted structural trapping during CO2 storage in offshore basin

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Abstract

Abstract Long-distance migration assisted structural trapping is an optimal structure for offshore geological carbon storage. Qualitative analysis of carbon trapping efficiency was investigated using CMG software, considering aqueous solubility and geochemistry reactions. CO 2 migration, mineral mole changes, geochemical induced PH and porosity variations and carbon storage contribution were also examined. CO 2 concentrates near the injection wells and migrates upward along the slightly dipping strata the disparity in density between CO 2 and aqueous. After CO 2 injection wells shut in, CO 2 plume continues to migrate upward along the slightly dipping strata, transporting towards the upper anticline. A large amount of CO 2 is still being trapped in the dipping strata due to wettability and capillary effects. Being dissolved CO 2 into saline aquifer forming H+, the dissolution of anorthite provided Ca 2+ and Al 3+ required for the precipitation of calcite and kaolinite over time. Calcite is initially in the dissolved state, gradually converting to the state of precipitation. Dynamics of mineral dissolution and precipitation influence PH and porosity changes. There is a PH decrease area during CO 2 migration. The porosity particularly near the wellbores showed a slightly decrease due to the deposition of previously dissolved minerals. The porosity around the top anticline experienced a substantial increase due to mineral dissolution in the formation. The proportion of structural trapping is continuously increasing during the CO 2 injection period, and is decreasing during CO 2 long-distance migration stage. Residual gas trapping displays the initially increasing and then decreasing trend due to wettability and capillary effects throughout the CO 2 migration period. It is observed that long-distance migration assisted structural trapping enhances the long-term security of CO 2 storage.
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WITHDRAWN: Long-distance migration assisted structural trapping during CO2 storage in offshore basin | Research Square window.SnipcartSettings = { analytics: { enabled: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 WITHDRAWN: Long-distance migration assisted structural trapping during CO2 storage in offshore basin Yanxin Lyu, Xiaoyu Fang, Hua Li, Guifeng Wang, Yi Xin, Haibo Li, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4780259/v2 This work is licensed under a CC BY 4.0 License Status: Posted Version 2 posted You are reading this latest preprint version Show more versions Editorial Note The full text of this preprint has been withdrawn by the authors due to author disagreement with the posting of the preprint. Therefore, the authors do not wish this work to be cited as a reference. Questions should be directed to the corresponding author. Editorial notes are used to provide important context regarding the topic of a preprint or to alert readers to potential issues concerning that preprint or a downstream publication associated with it. For more information on editorial notes, see our Editorial Policies . Abstract The full text of this preprint has been withdrawn by the authors due to author disagreement with the posting of the preprint. Therefore, the authors do not wish this work to be cited as a reference. Questions should be directed to the corresponding author. Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 2 posted You are reading this latest preprint version Show more versions 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. 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