Rock and Soil Mechanics ›› 2024, Vol. 45 ›› Issue (10): 2900-2906.doi: 10.16285/j.rsm.2023.1728

• Fundamental Theory and Experimental Research • Previous Articles     Next Articles

Dispersion and attenuation of compression waves in saturated viscoelastic porous media

SHI Wen-jia1, 2, CONG Lin3, YANG Duo-xing1   

  1. 1. National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China; 2. School of Emergency Management, University of Chinese Academy of sciences, Beijing 101408, China; 3. CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an, Shaanxi 710077, China
  • Received:2023-11-14 Accepted:2024-05-06 Online:2024-10-09 Published:2024-10-09
  • Supported by:
    This work was supported by the Major Project of Inner Mongolia Autonomous Region Science and Technology, China (2021ZD0034) and the National Natural Science Foundation of China (41874113).

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Abstract: The phenomenon of wave dispersion and its causes are a hot topic in the study of rock physics and acoustics of porous media. Based on the Biot theory and Darcy-Brinkman law, Maxwell-Brinkman and Kelvin-Brinkman viscoelastic porous media mechanical models were proposed, and the dispersion relationship of compression waves was established. The dispersion and attenuation laws of waves were revealed, and the effects of stress relaxation and creep on wave propagation velocity and inverse quality factor were analyzed. At low frequencies, the dispersion and attenuation of compression waves predicted by the Kelvin- Brinkman model and the Darcy-Brinkman-Biot model are consistent. While, at high frequencies, the dispersion and attenuation of compression waves predicted by the Maxwell-Brinkman model agree well with those by the Darcy-Brinkman-Biot model. The reliability of the physical model was verified using experimental data from the Gulf of Mexico. Through parameter sensitivity analysis, the method for optimizing medium parameters based on measured data was discussed.

Key words: Biot theory, Darcy-Brinkman law, porous media, viscoelasticity, frequency dispersion, quality factor

CLC Number: 

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