Capability of elastic-wave imaging for monitoring conformance and containment in geologic carbon storage

Feng, Zongcai; Huang, Lianjie; Gao, Kai; Gasperikova, Erika

doi:10.1016/j.ijggc.2022.103759

Cited by 3 publications

(1 citation statement)

References 60 publications

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“…Numerical seismic wave field simulation based on the elastic wave equation is important to study the kinematics and dynamics characteristics of seismic wave propagation in geologic bodies, which is widely used in seismic design [1], geologic survey [2], and non-destructive structure detection [3]. Currently, the numerical seismic wave field simulation methods include the finite element method (FEM) [4,5], the finite difference method (FDM) [6,7], and the boundary element method (BDM) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Multi-Directional Viscous Damping Absorbing Boundary in Numerical Simulation of Elastic Wave Dynamic Response

Zhao,

Yu,

et al. 2024

Applied Sciences

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Numerical seismic wave field simulation is essential for studying the dynamic responses in semi-infinite space, and the absorbing boundary setting is critical for simulation accuracy. This study addresses spherical waves incident from the free boundary by applying dynamic equations and Rayleigh damping. A new multi-directional viscous damping absorbing boundary (MVDB) method is proposed based on regional attenuation. An approximate formula for the damping value is established, which can achieve absorbing the boundary setting by only solving the mass damping coefficients without increasing the absorbing region grid cells or depending on the spatial and temporal walking distance. The validity and stability of the proposed method are proven through numerical calculations with seismic sources incident from different angles. Meanwhile, the key parameters affecting the absorption of the MVDB are analyzed, and the best implementation scheme is provided. In order to meet the requirements of mediums with different elastic parameters for boundary absorption and ensure the high efficiency of numerical calculations, the damping amplitude control coefficients k can be set between 1.02 and 1.12, the thickness of the absorbing region L is set to 2–3 times of the wavelength of the incident transverse wave, and the thickness of the single absorbing layer is set to the size of the discrete mesh of the model Δl.

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Section: Introductionmentioning

confidence: 99%

Multi-Directional Viscous Damping Absorbing Boundary in Numerical Simulation of Elastic Wave Dynamic Response

Zhao,

Yu,

et al. 2024

Applied Sciences

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Mitigation of numerical dispersion in seismic data in spectral domain with neural networks

Gadylshin,

Gondyul,

Lisitsa

et al. 2024

Soil Dynamics and Earthquake Engineering

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Elastic reverse time migration based on first-order velocity-dilatation-rotation equations using the optical flow vector

Xie,

Wang,

Song

et al. 2024

GEOPHYSICS

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The determination of the P- and S-wave propagation directions is crucial for achieving wavefield decomposition, polarity reversal correction, and noise suppression in elastic reverse time migration (RTM). Compared with the conventional decoupled elastic wave equation, the first-order velocity-dilatation-rotation equations enable a more accurate computation of propagation directions for P- and S-waves. Moreover, compared with the Poynting vector, the optical flow vector signifies the wavefield propagation directions more accurately. To effectively enhance the accuracy of elastic wave imaging, we propose an elastic RTM based on first-order velocity-dilatation-rotation equations using the optical flow vector. Numerical tests illustrate that the proposed method, with or without noise, can better eliminate the migration artifacts and improve the imaging accuracy of the elastic RTM than conventional methods, achieving more accurate wavefield decomposition and superior S-wave polarity reversal correction.

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Capability of elastic-wave imaging for monitoring conformance and containment in geologic carbon storage

Cited by 3 publications

References 60 publications

Multi-Directional Viscous Damping Absorbing Boundary in Numerical Simulation of Elastic Wave Dynamic Response

Multi-Directional Viscous Damping Absorbing Boundary in Numerical Simulation of Elastic Wave Dynamic Response

Mitigation of numerical dispersion in seismic data in spectral domain with neural networks

Elastic reverse time migration based on first-order velocity-dilatation-rotation equations using the optical flow vector

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