Direct imaging microseismic data below sources

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2017Direct imaging microseismic data below sourcesAuthors: Zhenbo ZhangQixin GeYihua XuanYajie WeiLiguo HanZhenbo ZhangCNOOC China Ltd.Search for more papers by this author, Qixin GeJilin UniversitySearch for more papers by this author, Yihua XuanCNOOC China Ltd.Search for more papers by this author, Yajie WeiJilin UniversitySearch for more papers by this author, and Liguo HanJilin UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2017-17666511.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The conventional direct imaging method of microseismic data regards the record as the incident wavefield as well as the scattered wavefield. However, this method cannot highlight the information carried by the wavefield from the deep source. In this paper, assuming that the position and the wavelet of the microseismic event are already known, we propose a reverse time migration (RTM) method to image the structure below the source. The proposed method is similar to the conventional RTM, only the source is underground. During imaging, the deeper wavefield will be more precise than that in the case when regarding the record as the incident wavefield. Hence we can acquire more accurate imaging result. However, the upgoing wavefield from the source underground will bring internal multiple, which could disturb the receiver wavefield. We decompose both the source wavefield as well as the receiver wavefield into the leftgoing and rightgoing parts to suppress this noise. Finally, we use a numerical example to demonstrate the effectiveness of the proposed method. Presentation Date: Wednesday, September 27, 2017 Start Time: 3:05 PM Location: Exhibit Hall C/D Presentation Type: POSTER Keywords: passive noise suppression, microseismic, migration, passive imagingPermalink: https://doi.org/10.1190/segam2017-17666511.1FiguresReferencesRelatedDetailsCited byPassive multiple reverse time migration imaging based on wave decomposition and normalized imaging conditions21 November 2019 | Applied Geophysics, Vol. 16, No. 3 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 Zhenbo Zhang, Qixin Ge, Yihua Xuan, Yajie Wei, and Liguo Han, (2017), "Direct imaging microseismic data below sources," SEG Technical Program Expanded Abstracts : 2987-2991. https://doi.org/10.1190/segam2017-17666511.1 Plain-Language Summary Keywordspassive noise suppressionmicroseismicmigrationpassive imagingPDF DownloadLoading ...