A rock physics workflow for the modeling of the effect of kerogen content and maturity level in shales

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2013A rock physics workflow for the modeling of the effect of kerogen content and maturity level in shalesAuthors: Zhiqi GuoXiangyang LiYingrui RenMark ChapmanYe ShenZhiqi GuoJilin USearch for more papers by this author, Xiangyang LiChina U of Petroleum and British Geological SurveySearch for more papers by this author, Yingrui RenU of EdinburghSearch for more papers by this author, Mark ChapmanU of EdinburghSearch for more papers by this author, and Ye ShenCNOOC Research InstituteSearch for more papers by this authorhttps://doi.org/10.1190/segam2013-0458.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Kerogen content plays a significant role in elastic properties due to its low density, and hydrocarbon-filled pores in organic matter generated during different maturity levels will enhance the effect of kerogen in shales. In this study, we develop a shale rock physics model by incorporating Kuster and Toksöz theory and the selfconsistent approximation method to quantify the effects of such factors on elastic properties in shales. Modeling results show that both kerogen content and kerogen-related porosity decrease velocities and density of shales, but kerogen content tends to affect elastic properties more profoundly, and the effect of kerogen-related porosity on the elastic properties only becomes more obvious as kerogen content goes up beyond about 0.1. We also find that the increase in kerogen content increases Poisson's ratio, while the variation in kerogen-related porosity has little effect on Poisson’s ratio. Finally, for the reflector model designed in this study, the variations in kerogen content and kerogen-related porosity result in significant and predictable variations in AVO intercept and gradient. Permalink: https://doi.org/10.1190/segam2013-0458.1FiguresReferencesRelatedDetailsCited byRock Physical Model and AVO Patterns for the Mud-Rich Source Rock22 April 2021 | Frontiers in Earth Science, Vol. 9Seismic Inversion for Risk Reduction in Drilling and Production in Unconventional Reservoirs19 October 2020Predicting drilling performance in unconventional reservoirs using seismic inversionColin M. Sayers, Adam Koesoemadinata, Sagnik Dasgupta, Vasudhaven Sudhakar, and Richard Hearn30 September 2020Effect of variations in microstructure on clay elastic anisotropyColin M. Sayers and Lennert D. den Boer30 January 2020 | GEOPHYSICS, Vol. 85, No. 2Effect of Kerogen and TOC on Seismic Characterization of Lower Cretaceous Shale Gas Plays in Lower Indus Basin, Pakistan9 September 2019 | Journal of the Geological Society of India, Vol. 94, No. 3Seismic inversion for engineering applications in unconventional reservoirsColin M. Sayers, Sagnik Dasgupta, Lennert D. den Boer, Edan Gofer, Maria Lascano, David Paddock, Vasudhaven Sudhakar, and Andy Walz1 August 2019A predictive anisotropic rock-physics model for estimating elastic rock properties of unconventional shale reservoirsColin M. Sayers and Sagnik Dasgupta3 May 2019 | The Leading Edge, Vol. 38, No. 5 SEG Technical Program Expanded Abstracts 2013ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2013 Pages: 5258 Publisher:Society of Exploration Geophysicists HistoryPublished Online: 19 Aug 2013 CITATION INFORMATION Zhiqi Guo, Xiangyang Li, Yingrui Ren, Mark Chapman, and Ye Shen, (2013), "A rock physics workflow for the modeling of the effect of kerogen content and maturity level in shales," SEG Technical Program Expanded Abstracts : 2948-2952. https://doi.org/10.1190/segam2013-0458.1 Plain-Language Summary PDF DownloadLoading ...