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A New Anelasticity Model for Wave Propagation in Partially Saturated Rocks

Author

Listed:
  • Chunfang Wu

    (School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China)

  • Jing Ba

    (School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China)

  • Xiaoqin Zhong

    (Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi’an 710018, China)

  • José M. Carcione

    (School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China
    National Institute of Oceanography and Applied Geophysics—OGS, Geophysics, 34010 Trieste, Italy)

  • Lin Zhang

    (School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China)

  • Chuantong Ruan

    (School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China
    School of Mathematics and Statistics, Zhoukou Normal University, Zhoukou 466001, China)

Abstract

Elastic wave propagation in partially saturated reservoir rocks induces fluid flow in multi-scale pore spaces, leading to wave anelasticity (velocity dispersion and attenuation). The propagation characteristics cannot be described by a single-scale flow-induced dissipation mechanism. To overcome this problem, we combine the White patchy-saturation theory and the squirt flow model to obtain a new anelasticity theory for wave propagation. We consider a tight sandstone Qingyang area, Ordos Basin, and perform ultrasonic measurements at partial saturation and different confining pressures, where the rock properties are obtained at full-gas saturation. The comparison between the experimental data and the theoretical results yields a fairly good agreement, indicating the efficacy of the new theory.

Suggested Citation

  • Chunfang Wu & Jing Ba & Xiaoqin Zhong & José M. Carcione & Lin Zhang & Chuantong Ruan, 2021. "A New Anelasticity Model for Wave Propagation in Partially Saturated Rocks," Energies, MDPI, vol. 14(22), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7619-:d:679386
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    Cited by:

    1. Chun Zhu & Shengqi Yang & Yuanyuan Pu & Lijun Sun & Min Wang & Kun Du, 2023. "Advanced Progress of the Geo-Energy Technology in China," Energies, MDPI, vol. 16(19), pages 1-6, September.

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