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• W2319043668 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2014Mudstone P-wave anisotropy measurements with non-contacting lasers under confining pressureAuthors: Ludmila Adam*Fang OuLorna StrachanJami JohnsonKasper van WijkBrad FieldLudmila Adam*U of AucklandSearch for more papers by this author, Fang OuU of AucklandSearch for more papers by this author, Lorna StrachanU of AucklandSearch for more papers by this author, Jami JohnsonU of AucklandSearch for more papers by this author, Kasper van WijkU of AucklandSearch for more papers by this author, and Brad FieldGNS ScienceSearch for more papers by this authorhttps://doi.org/10.1190/segam2014-0999.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The increased interest in mudstone rocks as oil and gas reservoirs requires new ways to quantify the physical properties of these rocks from indirect geophysical measurements. We present a new methodology to measure dense waveforms to estimate P-wave anisotropy with non-contacting lasers under confining pressures. Our goal is to correlate the elastic anisotropy to rock microstructure observations. We select samples with a range of organic material, with one sample being fractured. Although textural anisotropy is observed in most samples, this does not always result in an elastic wave anisotropy. However, if organic content is high, large velocity anisotropy is measured. As we increase pressure, mostly the slow P-wave velocity is affected as laminae and fractures close, resulting in a decrease in Thomsen parameter ε. The unique capacity of this system is outlined and correlations between textural observations and elastic parameters presented. Keywords: anisotropy, elastic, rock physics, shale gasPermalink: https://doi.org/10.1190/segam2014-0999.1FiguresReferencesRelatedDetailsCited byEstimation of δ and C13 of organic-rich shale from laser ultrasonic technique measurementJianyong Xie, Bangrang Di, Douglas R. Schmitt, Jianxin Wei, and Yangkang Chen8 June 2018 | GEOPHYSICS, Vol. 83, No. 4Mylonites as shales? Experimental observations of P-wave anisotropy dependence on mineralogy, layering and scaleLudmila Adam, Virginia Toy, and Carolyn Boulton1 September 2016Rock Physics Complete Session1 September 2016Full-wavefield modeling and reverse time migration of laser ultrasound data: A feasibility studyJeffrey Shragge, Thomas E. Blum, Kasper van Wijk, and Ludmila Adam25 September 2015 | GEOPHYSICS, Vol. 80, No. 6Resonant ultrasound spectroscopy of horizontal transversely isotropic samples22 July 2015 | Journal of Geophysical Research: Solid Earth, Vol. 120, No. 7 SEG Technical Program Expanded Abstracts 2014ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2014 Pages: 5183 publication data© 2014 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 05 Aug 2014 CITATION INFORMATION Ludmila Adam*, Fang Ou, Lorna Strachan, Jami Johnson, Kasper van Wijk, and Brad Field, (2014), Mudstone P-wave anisotropy measurements with non-contacting lasers under confining pressure, SEG Technical Program Expanded Abstracts : 2749-2754. https://doi.org/10.1190/segam2014-0999.1 Plain-Language Summary Keywordsanisotropyelasticrock physicsshale gasPDF DownloadLoading ..." @default.
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