Determining changes in CO2 saturation from time-lapse measurements using ghost reflections retrieved by seismic interferometry

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2013Determining changes in CO2 saturation from time-lapse measurements using ghost reflections retrieved by seismic interferometryAuthors: Deyan DraganovRanajit GhosePetar AngelovRob ArtsDeyan DraganovDepartment of Geoscience and Engineering, Delft U of TechnologySearch for more papers by this author, Ranajit GhoseDepartment of Geoscience and Engineering, Delft U of TechnologySearch for more papers by this author, Petar AngelovJason—A CGG CompanySearch for more papers by this author, and Rob ArtsTNOSearch for more papers by this authorhttps://doi.org/10.1190/segam2013-0951.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract One of the targets of time-lapse seismic monitoring of CO2 sequestration is to determine the parts of the reservoir reached by the injected CO2 and to estimate their saturation. Such information could be extracted from the time-lapse measurement using AVO or impedance information. But non-repeatability of the source positions and time-lapse changes in the overburden could lower the accuracy of the estimation of saturation. We propose the utilization of non-physical (ghost) reflections retrieved by seismic interferometry to estimate the CO2 saturation inside the reservoir. We use the ghost reflections to directly estimate the layer specific velocities inside the reservoir and the cap rock and thus eliminate the two mentioned causes of inaccuracies. We apply this idea and demonstrate its added value and potential using numerically modelled data for a simplified model based on the Sleipner underground storage site in the North Sea. Permalink: https://doi.org/10.1190/segam2013-0951.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2013ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2013 Pages: 5258 Publisher:Society of Exploration Geophysicists HistoryPublished: 19 Aug 2013 CITATION INFORMATION Deyan Draganov, Ranajit Ghose, Petar Angelov, and Rob Arts, (2013), "Determining changes in CO2 saturation from time-lapse measurements using ghost reflections retrieved by seismic interferometry," SEG Technical Program Expanded Abstracts : 5004-5009. https://doi.org/10.1190/segam2013-0951.1 Plain-Language Summary PDF DownloadLoading ...