Echo phone for direct attenuation indication

Abstract

PreviousNext No AccessSecond International Meeting for Applied Geoscience & EnergyEcho phone for direct attenuation indicationAuthors: Lu LiuTong FeiFuhao QinYi LuoLu LiuAramco AsiaSearch for more papers by this author, Tong FeiSaudi AramcoSearch for more papers by this author, Fuhao QinSaudi AramcoSearch for more papers by this author, and Yi LuoSaudi AramcoSearch for more papers by this authorhttps://doi.org/10.1190/image2022-3745568.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractEach reservoir has its own characteristic seismic frequency response due to its unique lithology and fluid property. When the seismic waves illuminate the subsurface medium and propagate back to the surface geophones, they bring back the attenuation information related to the reservoir fluid features. Such information can be reflected by the amplitude and frequency variations of the seismic waves. We propose a novel method of echo phone to directly reveal the subsurface attenuation features. This method first focuses the surface seismic data back on the seal of the target via the wave-equation redatuming approach. This simulates a new data set that can be assumed to be acquired by setting many sources on the seal and associated receivers on the surface. We then isolate all the seismic events passing through the targets by computing the transmitted arrivals from the redatumed source to the surface receivers. Since the wavepath corresponding to these events are all influenced by the reservoir right below the sources, we compute frequency-dependent attributes, including frequency spectrum ratio and centroid frequency, to evaluate the feature of reservoir attenuation. Since the hydrocarbon, especially gas, has stronger attenuation than water, such attributes can be used to distinguish the reservoir feature. Numerical tests on both synthetic and field data sets validate the feasibility of this study.Keywords: echo phone, attenuation, redatumingPermalink: https://doi.org/10.1190/image2022-3745568.1FiguresReferencesRelatedDetails Second International Meeting for Applied Geoscience & EnergyISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2022 Pages: 3694 publication data© 2022 Published in electronic format with permission by the Society of Exploration Geophysicists and the American Association of Petroleum GeologistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 15 Aug 2022 CITATION INFORMATION Lu Liu, Tong Fei, Fuhao Qin, and Yi Luo, (2022), "Echo phone for direct attenuation indication," SEG Technical Program Expanded Abstracts : 2611-2615. https://doi.org/10.1190/image2022-3745568.1 Plain-Language Summary Keywordsecho phoneattenuationredatumingPDF DownloadLoading ...