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Abstract

Summary

Distributed Acoustic Sensing (DAS) is based on Rayleigh scattering principles used to determine acoustic strain signals over long distances, effectively turning the optic fiber cable into a series of geophones. Once the data is acquired, advanced processing techniques such as Full Waveform Inversion (FWI) can be applied to obtain information for a wide variety of applications. Historically DAS is used as a complementary tool to improve understanding of flow distribution along the entire length of a producing wellbore. It is commonly used in collaboration with DTS to interpret and define flow allocation throughout the life of the well. 3D DAS Vertical Seismic Profiles (VSPs) also can be used as a cost-effective tool for the time-lapse reservoir monitoring due to the finer channel sampling and flexibility in deploying the fiber-optic cables. The application of FWI to 3D DAS is an innovative way to image the steam chamber during the steam-assisted gravity drainage (SAGD) process for Oil Sands. This successful case study demonstrates that 3D DAS FWI can provide a significantly more cost-effective and technically equivalent alternative to conventional 4D seismic programs.

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/content/papers/10.3997/2214-4609.202120111
2021-09-01
2024-03-29
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References

  1. Crase, E., Pica, A., Noble, M., McDonald, J., and Tarantola, A.
    [1990] Robust elastic nonlinear waveform inversion: application to real data: Geophysics, 55, 527–538.
    [Google Scholar]
  2. Egorov, A., Correa, J., Bona, A., Pevzner, R., Tertyshnikov, K., Glubokovskikh, S., Puzyrev, V., and Gurevich, B.
    [2018] Elastic full-waveform inversion of vertical seismic profile data acquired with distributed acoustic sensors. Geophysics, 83, R273–R281.
    [Google Scholar]
  3. Feng, H, Kay, T., Wang, W., and Ayre, A.
    [2020] 4-D time lapse full waveform inversion case study for SAGD steam chamber imaging. GeoConvention 2020.
    [Google Scholar]
  4. Kotsi, M., and Malcolm, A.
    [2017] A statistical comparison of three 4D Full-Waveform Inversion schemes: SEG International Exposition and 87th Annual Meeting, 1434–1438.
    [Google Scholar]
  5. Pratt, R. G.
    [1999] Seismic waveform inversion in the frequency domain, Part 1: Theory and verification in a physical scale model: Geophysics, 64, 888–901.
    [Google Scholar]
  6. Tarantola, A.
    [1984] Inversion of seismic reflection data in the acoustic approximation: Geophysics, 49, 1259–1266.
    [Google Scholar]
  7. Warner, M., and Guasch, L.
    [2014] Adaptive waveform inversion: Theory: 84th SEG Technical Program Expanded Abstracts. Society of Exploration Geophysicists, Expanded Abstracts, 1089–1093.
    [Google Scholar]
  8. Zhang, Z., and Huang, L.
    [2013] Double-difference elastic-waveform inversion with prior information for time-lapse monitoring: Geophysics, 78, R259–R273
    [Google Scholar]
  9. Zhang, W., and Zhang, J.
    [2011] Full waveform tomography with consideration for large topography variations, SEG Expended Abstracts30, 2539–2542.
    [Google Scholar]
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  • Published online: 01 Sep 2021
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