3D Numerical Simulation of Elastic Wave Propagation in Discrete Fracture Network Rocks

Chen, Guiwu; Song, Lei; Liu, Lanbo

doi:10.1007/s00024-019-02287-0

Cited by 9 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the past decades, extensive research has been done to investigate wave propagation in fractured rocks based on theoretical analysis (Schoenberg 1980 ; Hudson 1981 ; Crampin 1984 ; Pyrak-Nolte and Cook 1987 ; Shapiro and Kneib 1993 ; Pyrak-Nolte and Nolte 1995 ; Zhao and Cai 2001 ; Perino et al 2010 ; Li 2013 ; Li et al 2014 , 2015 ; Fan et al 2018 , 2021 ), laboratory experiments (Pyrak-Nolte et al 1990 ; Pyrak-Nolte 1996 ; Huang et al 2014 ; Chen et al 2015 , 2016 ; Zhu et al 2015 ; Liu et al 2017 ; Li et al 2017 , 2019 ; Modiriasari et al 2020 ), and numerical simulations (Vlastos et al 2003 , 2007 ; Wang et al 2006 , 2022 ; Deng et al 2012 ; Fan et al 2013 ; Fu et al 2015 ; Yousef and Angus 2016 ; Chen et al 2019 ; Zhu et al 2020 ; Lei and Sornette 2021a , b ; Yang et al 2021 ; Sawayama et al 2022 ). The elementary scenario for studying wave propagation in fractured rock is the transmission of wave energy across a single fracture, which is controlled by the fracture stiffness, wave frequency, and matrix properties (Schoenberg 1980 ; Pyrak-Nolte et al 1990 ).…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of Elastic Wave Arrival Behavior in a Naturally Fractured Rock Based on a Combined Displacement Discontinuity-Discrete Fracture Network Model

et al. 2022

View full text Add to dashboard Cite

The arrival behavior of elastic waves in a naturally fractured rock is studied based on numerical simulations. We use the discrete fracture network method to represent the distribution of a natural fracture system and employ the displacement discontinuity method to compute the propagation of elastic waves across individual fractures. We analyze macroscopic wavefield arrival properties collectively arising from the interaction between elastic waves and numerous fractures in the system. We show that the dimensionless angular frequency ῶ = ωZ/κ exerts a fundamental control on the arrival behavior of a plane wave traveling through the fractured rock, where ω, Z, and κ are the angular frequency, seismic impedance, and fracture stiffness, respectively. An asynchronous arrival phenomenon of the wave energy occurs and becomes more significant with an increased ῶ. Two regimes are identified according to the two-branch dependency of the fractal dimension D of the FFAW on ῶ, where the wave arrival behavior is within a non-fractal regime for ῶ smaller than the critical frequency ῶc ≈ 1.0, and enters the fractal regime for ῶ ≥ ῶc. The self-affine properties of the FFAW, i.e., the roughness exponent α and the correlation length lc, both linearly decrease as a function of the exponent ξ (with ῶ = 10ξ) in the fractal regime. Early breakthrough of wave transport occurs in regions with relatively low fracture density, while late-time arrival happens in regions of high fracture density.

show abstract