Title: Modeled Velocity and Reflectivity Properties of Anisotropic Hydrated Sediments
Abstract: Journal of Computational AcousticsVol. 09, No. 04, pp. 1507-1522 (2001) ICTCA'99 PapersNo AccessMODELED VELOCITY AND REFLECTIVITY PROPERTIES OF ANISOTROPIC HYDRATED SEDIMENTSM. JAKOBSEN, T. A. JOHANSEN, and B. O. RUUDM. JAKOBSENInstitute of Solid Earth Physics, University of Bergen, Allegt. 41, N-5007 Bergen, Norway, T. A. JOHANSENInstitute of Solid Earth Physics, University of Bergen, Allegt. 41, N-5007 Bergen, Norway, and B. O. RUUDInstitute of Solid Earth Physics, University of Bergen, Allegt. 41, N-5007 Bergen, Norwayhttps://doi.org/10.1142/S0218396X01001029Cited by:4 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail AbstractThe potential of mapping the extent gas hydrate from seismic data relies on the micromechanical model linking the actual material properties to the relevant observational data. We here consider four-phase sediment models consisting of hydrate, fluid, quartz (grains) and clay (platelets). The hydrate may occur in two ways when the pore volume is partially saturated, either in the pore voids without grain contact (unconnected), or as a grain coating, i.e. acting as a cementation of the grains (connected). In this model, the spatial orientations of the clay platelets are taken into account. By considering a model with a dominant horizontal grain distribution, we find that the elastic stiffnesses and velocities increase with an increasing proportion of hydrate. Both P and S velocities are largest for connected hydrates. Furthermore, the P wave anisotropy is largest for connected hydrates, while the S wave anisotropy is largest for the unconnected hydrates. If we consider the hydrate model as unconnected for low saturation (less than 50%) and connected for higher saturation, the reflectivity properties of the bottom simulating reflector (BSR) are similar to those found by other investigators considering no preferred grain orientation.Presented at ICTCA'99, the 4th International Conference on Theoretical and Computational Acoustics, May 1999, Trieste, Italy. FiguresReferencesRelatedDetailsCited By 4Rock physics of sand-shale mixtures: Classifications, theoretical formulations and study on real datasetBenyamin Khadem, Mohammad Reza Saberi and Per Avseth1 Dec 2021 | Marine and Petroleum Geology, Vol. 134Elastic anisotropy modeling of Kimmeridge shaleRoman N. Vasin, Hans‐Rudolf Wenk, Waruntorn Kanitpanyacharoen, Siegfried Matthies and Richard Wirth1 August 2013 | Journal of Geophysical Research: Solid Earth, Vol. 118, No. 8Rock physics modelling of shale diagenesisAnders Dræge, Morten Jakobsen and Tor Arne Johansen6 June 2022 | Petroleum Geoscience, Vol. 12, No. 1Rock physics modelling of shale cementationAnders Dræge, Morten Jakobsen and Tor Arne Johansen3 January 2004 Recommended Vol. 09, No. 04 Metrics History Received 17 July 1999 Revised 29 June 2000 PDF download
Publication Year: 2001
Publication Date: 2001-12-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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