Microseismic forward modeling and polarization characteristics analysis in viscoelastic anisotropic media based on different focal mechanisms

PreviousNext No AccessInternational Geophysical Conference, Qingdao, China, 17-20 April 2017Microseismic forward modeling and polarization characteristics analysis in viscoelastic anisotropic media based on different focal mechanismsAuthors: Yao Zhen-an*Sun Cheng-yuYao Zhen-an*China University of Petroleum (East China)Search for more papers by this author and Sun Cheng-yuChina University of Petroleum (East China)Search for more papers by this authorhttps://doi.org/10.1190/IGC2017-363 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract With the progress of seismic instruments, processing and interpretation techniques, micro-seismic plays a more and more important role in describing fracture systems in reservoir management and monitoring. In order to study the mechanism of micro-seismic such as hydrofracture, micro-seismic signal propagation characteristics and polarization characteristics were studied in this paper based on the seismic moment tensor and viscoelastic anisotropic wave equation. Staggered-grid finite-difference approach was used to discrete velocity-stress equation and velocity component were uploaded to generate ISO, DC and CLVD sources. With analysis of simulations in eight kinds of media for three kind of source, the following conclusions were reached: (a) The energy of DC source simulations mainly focuses on qS-wave in the Vy component. On the contrary, the energy of ISO and CLVD source simulations mainly focuses on both qP-wave and qS-wave in Vx and Vz components, and the CLVD source would generate stronger qS-wave than ISO source especially in Vx component. (b) The viscoelasticity of media would result in amplitude attenuation and change of waveform characteristics, especially for qS-wave. Shear wave splitting can be observed in three kinds of source simulations especially in viscoelastic media. (c) VTI media can be distinguished from other types of media with CLVD source because of that the sudden change of the curve between polarizing angle and incident angle is different. In terms of micro-seismic signal polarization characteristics, the impact of viscoelastic is small. Keywords: microseismic, modeling, polarization, anisotropy, processing, interpretationPermalink: https://doi.org/10.1190/IGC2017-363FiguresReferencesRelatedDetails International Geophysical Conference, Qingdao, China, 17-20 April 2017ISSN (online):2159-6832Copyright: 2017 Pages: 1525 publication data© 2017 Published in electronic format with permission by the Society of Exploration Geophysicists and Chinese Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished Online: 31 May 2017 CITATION INFORMATION Yao Zhen-an* and Sun Cheng-yu, (2017), "Microseismic forward modeling and polarization characteristics analysis in viscoelastic anisotropic media based on different focal mechanisms," SEG Global Meeting Abstracts : 1419-1422. https://doi.org/10.1190/IGC2017-363 Plain-Language Summary KeywordsmicroseismicmodelingpolarizationanisotropyprocessinginterpretationPDF DownloadLoading ...