Estimation of timeshifts between time-lapse seismic images using spectral decomposition

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2017Estimation of timeshifts between time-lapse seismic images using spectral decompositionAuthors: Mason PhillipsSergey FomelMason PhillipsUniversity of Texas–AustinSearch for more papers by this author and Sergey FomelUniversity of Texas–AustinSearch for more papers by this authorhttps://doi.org/10.1190/segam2017-17495603.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Time-lapse timeshifts are difficult to measure from seismic data in the presense of low frequencies or thin beds causing tuning effects. We propose to decompose time-lapse seismic images into discrete frequency components using the local time-frequency transform before estimating timeshifts. Use of high frequency components mitigate problems associated with sidelobe interference. We use amplitude-adjusted plane-wave destruction (APWD) filters to invert for both timeshifts and amplitude changes between the time-lapse seismic images at each frequency. Plane-wave destruction can efficiently measure small shifts between seismic traces, making this algorithm particularly effective. The effectiveness of the proposed workflow is confirmed using a 1D synthetic example and a field data example from the Cranfield CO2 sequestration project. Presentation Date: Wednesday, September 27, 2017 Start Time: 3:05 PM Location: 351F Presentation Type: ORAL Keywords: decomposition, monitoring, spectral, time-lapse, 4DPermalink: https://doi.org/10.1190/segam2017-17495603.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2017ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2017 Pages: 6093 publication data© 2017 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 17 Aug 2017 CITATION INFORMATION Mason Phillips and Sergey Fomel, (2017), "Estimation of timeshifts between time-lapse seismic images using spectral decomposition," SEG Technical Program Expanded Abstracts : 5839-5844. https://doi.org/10.1190/segam2017-17495603.1 Plain-Language Summary Keywordsdecompositionmonitoringspectraltime-lapse4DPDF DownloadLoading ...