1887

Abstract

Summary

Since the permeability and porosity of shale gas reservoirs are fairly low in general, often fracturing is needed during production. Micro-seismic wave, generated by underground rock rupture, is commonly used to monitor real-time location, the size and the complexity of cracks generated during fracturing. Water injection, during fracturing, can lead to the increase of pore pressure at the injection well and pressure diffusion. In this paper, we focus on micro-seismic wave propagation with the effect of pore pressure during fracturing, and improve accuracy of the diffusion simulation of pore pressure in the anisotropic fracture media. The variation of the central frequency represents the seismic attenuation. The simulation results show that pore pressure causes significant seismic attenuation. Seismic attenuation is increased with the prolongation of the injection time. In the presentation, we will report more analysis of the variation of attenuation with injection pressure.

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/content/papers/10.3997/2214-4609.201801451
2018-06-11
2020-09-20
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References

  1. AndersonD. L., MinsterB. & ColeD.
    , 1974, The effect of oriented cracks on seismic velocities. Journal of Geophysical Research, 79(26), 4011–4015.
    [Google Scholar]
  2. BhatnagarP.L., GrossE.P. & Krook, M.
    , 1954, A model for collision processes in gases. I. Small amplitude processes in charged and neutral one-component systems. Physical Review, 94(3), 511.
    [Google Scholar]
  3. MaillotB. & Main, I.G.
    , 1996, A lattice BGK model for the diffusion of pore fluid pressure, including anisotropy, heterogeneity, and gravity effects. Geophysical research letters, 23(1), 13–16.
    [Google Scholar]
  4. MohanmadA.A.
    , 2011, Lattice Boltzmann Method. Springer, London.
    [Google Scholar]
  5. NishizawaO.
    , 1982, Seismic velocity anisotropy in a medium cotaining oriented cracks. Transversely isotropic case. Journal of Physics of the Earth, 30(4), 331–347.
    [Google Scholar]
  6. O’ConnellR.J. & Budiansky, B.
    , 1974, Seismic velocities in dry and saturated cracked solids. Journal of Geophysical Research, 79(35), 5412–5426.
    [Google Scholar]
  7. Qian, Y.H., d’Humières, D. & LallemandP.
    , 1992, Lattice BGK models for Navier-Stokes equation. Europhysics Letters, 17(6), 479.
    [Google Scholar]
  8. VlastosS., LiuE., MainI.G., Schoenberg, M, Narteau, C., Li, X.Y. & Maillot, B.
    , 2006. Dual simulations of fluid flow and seismic wave propagation in a fractured network: effects of pore pressure on seismic signature. Geophysical Journal International, 166(2), 825–838.
    [Google Scholar]
  9. WangY.H.
    , 2014. Stable Q analysis on vertical seismic profiling data. Geophysics, 79(4), D217–D225.
    [Google Scholar]
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