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dc.contributor.authorMichel, O.
dc.contributor.authorTsvankin, Ilya
dc.date.accessioned2018-12-13T09:14:16Z
dc.date.available2018-12-13T09:14:16Z
dc.date.created2018-12-12T02:46:56Z
dc.date.issued2017
dc.identifier.citationMichel, O. and Tsvankin, I. 2017. Waveform inversion for microseismic velocity analysis and event location in VTI media. Geophysics. 82 (4): pp. WA95-WA103.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/72740
dc.identifier.doi10.1190/GEO2016-0651.1
dc.description.abstract

© 2017 Society of Exploration Geophysicists. Waveform inversion (WI), which has been extensively used in reflection seismology, could provide improved velocity models and event locations for microseismic surveys. Here, we develop an elastic WI algorithm for anisotropic media designed to estimate the 2D velocity field along with the source parameters (location, origin time, and moment tensor) from microseismic data. The gradient of the objective function is obtained with the adjoint-state method, which requires just two modeling simulations at each iteration. In the current implementation the source coordinates and velocity parameters are estimated sequentially at each stage of the inversion to minimize trade-offs and improve the convergence. Synthetic examples illustrate the accuracy of the inversion for layered VTI (transversely isotropic with a vertical symmetry axis) media, as well as the sensitivity of the velocity-analysis results to noise, the length of the receiver array, errors in the initial model, and variability in the moment tensor of the recorded events.

dc.publisherSociety of Exploration Geophysics
dc.titleWaveform inversion for microseismic velocity analysis and event location in VTI media
dc.typeJournal Article
dcterms.source.volume82
dcterms.source.number4
dcterms.source.startPageWA95
dcterms.source.endPageWA103
dcterms.source.issn0016-8033
dcterms.source.titleGeophysics
curtin.departmentWASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
curtin.accessStatusFulltext not available


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