Analysis and Interpretation the Effect of General Anisotropy on 3-D Marine CSEM Response Based on a Goal-oriented Adaptive FE Method

Analysis and Interpretation the Effect of General Anisotropy on 3-D Marine CSEM Response Based on a Goal-oriented Adaptive FE Method | 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 Analysis and Interpretation the Effect of General Anisotropy on 3-D Marine CSEM Response Based on a Goal-oriented Adaptive FE Method jiankai li, Ji Cai, Ying Liu, Lihua Liu, Ling Huang, Jingyu Gao, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4821423/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 marine controlled-source electromagnetic (CSEM) method offers a range of applications in marine geophysics, including mapping hydrocarbon reservoirs, studying seafloor geology, identifying potential mineral deposits, and investigating hydrate occurrences. Nevertheless, the interpretation of marine CSEM data becomes challenging when complex anisotropy is present. Therefore, we extend the scope of numerical simulations of 3-D marine CSEM responses from a specific case of dipping anisotropy to general anisiotropy based on a goal-oriented adaptive finite element (FE) method. We verify the upgraded argorithm using a 1-D anisotropic layered model with quasi-analytical solutions, and then apply the algorithm to compute marine CSEM responses over a set of 3-D anisotropic models. The behavior of the responses is explained by visualizing the flow of electromagnetic energy within the anisotropic conductivity structures using the Poynting vector, which helps explain how the energy propagates and interacts with the anisotropic media, providing insights into the observed response patterns. The numerical results clearly demonstrate that both the dipping and azimuthal anisotropy in the sediment have considerable impacts on marine CSEM responses, but their effects follow different patterns and highly dependent on the orientation of the electric dipole source utilized. However, the influence of the anisotropic reservoir can hardly be observed. This study emphasizes the significance of incorporating anisotropy into the interpretation of marine CSEM surveys. It contributes to the understanding of the impacts of general anisotropy on marine CSEM responses and provides a valuable approach for accurately modeling and interpreting marine CSEM data in the presence of anisotropic conductivity. Marine CSEM General electrical anisotropy N´ed´elec finite element Poynting vector 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-4821423","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":336962542,"identity":"aad6567f-f1c0-47a6-ac7f-288fb93236b4","order_by":0,"name":"jiankai li","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"jiankai","middleName":"","lastName":"li","suffix":""},{"id":336962543,"identity":"89ce1876-820c-4176-a4e0-14c0848a20ea","order_by":1,"name":"Ji 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Nevertheless, the interpretation of marine CSEM data becomes challenging when complex anisotropy is present. Therefore, we extend the scope of numerical simulations of 3-D marine CSEM responses from a specific case of dipping anisotropy to general anisiotropy based on a goal-oriented adaptive finite element (FE) method. We verify the upgraded argorithm using a 1-D anisotropic layered model with quasi-analytical solutions, and then apply the algorithm to compute marine CSEM responses over a set of 3-D anisotropic models. The behavior of the responses is explained by visualizing the flow of electromagnetic energy within the anisotropic conductivity structures using the Poynting vector, which helps explain how the energy propagates and interacts with the anisotropic media, providing insights into the observed response patterns. The numerical results clearly demonstrate that both the dipping and azimuthal anisotropy in the sediment have considerable impacts on marine CSEM responses, but their effects follow different patterns and highly dependent on the orientation of the electric dipole source utilized. However, the influence of the anisotropic reservoir can hardly be observed. This study emphasizes the significance of incorporating anisotropy into the interpretation of marine CSEM surveys. 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