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Sensitivity Analysis of Seismic Velocity and Attenuation Variations for Longmaxi Shale during Hydraulic Fracturing Testing in Laboratory

Author

Listed:
  • Hongyu Zhai

    (Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China)

  • Xu Chang

    (Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China)

  • Yibo Wang

    (Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China)

  • Ziqiu Xue

    (Research Institute of Innovative Technology for the Earth (RITE), 9-2 Kizugawadai, Kizu-cho, Soraku-gun, Kyoto 619-0292, Japan)

  • Xinglin Lei

    (Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Central 7, Higashi 1-1, Tsukuba City, Ibaraki 305-8567, Japan)

  • Yi Zhang

    (Research Institute of Innovative Technology for the Earth (RITE), 9-2 Kizugawadai, Kizu-cho, Soraku-gun, Kyoto 619-0292, Japan)

Abstract

During the hydraulic fracturing procedure in shale-gas exploitation, the poroelastic properties of shale formation can be altered significantly. However, it is difficult to evaluate these variations using microseismic field data. In this study, we conduct a hydro-fracturing experiment using Longmaxi shale, which is a major formation for shale-gas production in China, to simulate the water injection and rock fracturing procedure. The variation of the velocity and attenuation for primary/secondary (P/S) ultrasonic waves was investigated throughout the entire experimental procedure. The results show that the attenuation is more sensitive to sample rupture than the velocity. However, P-wave attenuation loses sensitivity to the water injection after the fractures are saturated with water. In that case, it is preferable to use S-wave attenuation to identify the opening/closing of the fractures. Based on the experimental results, we can conclude that the variation of the attenuation must be considered during microseismic data processing and interpretation.

Suggested Citation

  • Hongyu Zhai & Xu Chang & Yibo Wang & Ziqiu Xue & Xinglin Lei & Yi Zhang, 2017. "Sensitivity Analysis of Seismic Velocity and Attenuation Variations for Longmaxi Shale during Hydraulic Fracturing Testing in Laboratory," Energies, MDPI, vol. 10(9), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1393-:d:111844
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    Citations

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    Cited by:

    1. Seyedalireza Khatibi & Mehdi Ostadhassan & David Tuschel & Thomas Gentzis & Humberto Carvajal-Ortiz, 2018. "Evaluating Molecular Evolution of Kerogen by Raman Spectroscopy: Correlation with Optical Microscopy and Rock-Eval Pyrolysis," Energies, MDPI, vol. 11(6), pages 1-19, May.
    2. Wei Zhu & Xu Chang & Yibo Wang & Hongyu Zhai & Zhenxing Yao, 2018. "Reconstruction of Hydraulic Fractures Using Passive Ultrasonic Travel-Time Tomography," Energies, MDPI, vol. 11(5), pages 1-17, May.
    3. Qiuping Qin & Qingfeng Xue & Zizhuo Ma & Yikang Zheng & Hongyu Zhai, 2021. "Hydraulic Fracturing Simulations with Real-Time Evolution of Physical Parameters," Energies, MDPI, vol. 14(6), pages 1-12, March.

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