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• W3198111015 abstract "PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded AbstractsData assimilated time-lapse viscoacoustic full-waveform inversion for monitoring CO2 geological storageAuthors: Chao HuangTieyuan ZhuChao HuangState Key Laboratory of Marine Geology, Tongji UniversitySearch for more papers by this author and Tieyuan ZhuDepartment of Geosciences, The Pennsylvania State UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2021-3583232.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractMonitoring dynamic evolution of CO2 plume in subsurface, as well as detecting and quantifying any potential leakages are crucial for long-term geological storage of anthropogenic carbon dioxide. Dense time-lapse seismic monitoring has made it possible to image the nearly continuous subsurface changes of seismic properties due to CO2 plume distribution. Time-lapse acoustic/elastic full waveform inversion (TLFWI) algorithms are able to recover high spatial resolution statics subsurface velocity models by retrieving waveform information from time-lapse seismic data, but the neglecting attenuation caused by the injected CO2 blurs the final velocity models. Another question is the TLFWI methods barely have strong constraint on extracting temporal information from dense time-lapse data to reconstruct high resolution dynamic evolution subsurface models. Besides, to quantify these subsurface models derived by TLFWI with uncertainty analysis is also challenging. Here we propose a data assimilation based time-lapse viscoacoustic full waveform inversion (TLQFWI) method, using hierarchical matrix powered extended Kalman filter (HiEKF) to simultaneously predict dynamic evolution images of subsurface velocity and attenuation changes and quantify the corresponding uncertainties of the changes over time. We demonstrate the validity and applicability of the proposed TLQFWI-HiEKF with a realistic CO2 monitoring models derived from Frio-II CO2 injection sites. The high-resolution time-lapse velocity and attenuation changes clearly reveal a continuously velocity reduction and attenuation increasing due to the injection of CO2.Keywords: attenuation, full-waveform inversion, crosswellPermalink: https://doi.org/10.1190/segam2021-3583232.1FiguresReferencesRelatedDetails First International Meeting for Applied Geoscience & Energy Expanded AbstractsISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2021 Pages: 3561 publication data© 2021 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 01 Sep 2021 CITATION INFORMATION Chao Huang and Tieyuan Zhu, (2021), Data assimilated time-lapse viscoacoustic full-waveform inversion for monitoring CO2 geological storage, SEG Technical Program Expanded Abstracts : 3459-3463. https://doi.org/10.1190/segam2021-3583232.1 Plain-Language Summary Keywordsattenuationfull-waveform inversioncrosswellPDF DownloadLoading ..." @default.
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• W3198111015 title "Data assimilated time-lapse viscoacoustic full-waveform inversion for monitoring CO2 geological storage" @default.
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