1887

Abstract

Summary

Clay minerals are important components in shale, controlling elastic properties and anisotropy of shale. Knowing the elastic properties of shale with different types of clay minerals is therefore imperative to fully understand seismic properties of the reservoir. In this study, three sets of samples with different type of clay minerals were made. Ultrasonic experiments have been conducted to study the effect of stress on brittleness of synthetic shale with different types of clay minerals. The results show that the types of clay minerals have great influence on the brittleness of shale. Structure difference and compositional variations of clay minerals may explain some of the behavior. Dynamic Young’s moduli E and Poisson’s ratios v increase with applied pressure, but the rate of increase for samples is higher at low pressures (< 20 MPa). Besides, we also find that E11 is always larger than E33 and v31 is also different from v12, which indicate that Young’s moduli E and Poisson’s ratio v of samples have anisotropic behavior. In terms of the birttleness of samples, B11 is always larger than B33, which may be attributed to the layer charge and low-aspect-ratio pores between the clay particles.

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/content/papers/10.3997/2214-4609.201700655
2017-06-12
2020-04-02
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References

  1. Banik, N.
    [2012] Effects of VTI anisotropy on shale reservoir characterization: Middle East Unconventional Gas Conference and Exhibition, Society of Petroleum Engineers, SPE 150269.
    [Google Scholar]
  2. Cheadle, S. P., Brown, R. J., and Lawton, D. C.
    [1991] Orthorhombic anisotropy — A physical seismic modeling study: Geophysics, 56, 1603–1613.
    [Google Scholar]
  3. Higgins, S.
    [2008] Anisotropic stress models improve completion design in the Baxter Shale: SPE115736.
    [Google Scholar]
  4. Gong, F.
    [2016] The Effects of Water Saturation and Diagenetic Pressure on Elastic Anisotropy of Synthetic Shale. SEG International Exposition and 86th Annual Meeting, 372–375.
    [Google Scholar]
  5. GuoZ., Chapman, M.
    [2012] Exploring the effect of fractures and microstructure on brittleness index in the Barnett Shale. SEG Technical Program Expanded Abstracts
    [Google Scholar]
  6. Rickman, R. M,
    . [2008], A practical use of shale petrophysics for stimulation design optimization: All shale plays are not clones of the Barnett Shale: Presented at the 2008 SPE Annual Technical Conference and Exhibition.
    [Google Scholar]
  7. Sayers, C. M.
    [2010] The effect of anisotropy on the Young’s moduli and Poisson’s ratios of shales: SEG Technical Program Expanded Abstracts. 2606–2611.
    [Google Scholar]
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