首页|Accurate simulations of pure-viscoacoustic wave propagation in tilted transversely isotropic media

Accurate simulations of pure-viscoacoustic wave propagation in tilted transversely isotropic media

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Forward modeling of seismic wave propagation is crucial for the realization of reverse time migration(RTM)and full waveform inversion(FWI)in attenuating transversely isotropic media.To describe the attenuation and anisotropy properties of subsurface media,the pure-viscoacoustic anisotropic wave equations are established for wavefield simulations,because they can provide clear and stable wave-fields.However,due to the use of several approximations in deriving the wave equation and the introduction of a fractional Laplacian approximation in solving the derived equation,the wavefields simulated by the previous pure-viscoacoustic tilted transversely isotropic(TTI)wave equations has low accuracy.To accurately simulate wavefields in media with velocity anisotropy and attenuation anisot-ropy,we first derive a new pure-viscoacoustic TTI wave equation from the exact complex-valued dispersion formula in viscoelastic vertical transversely isotropic(VTI)media.Then,we present the hybrid finite-difference and low-rank decomposition(HFDLRD)method to accurately solve our proposed pure-viscoacoustic TTI wave equation.Theoretical analysis and numerical examples suggest that our pure-viscoacoustic TTI wave equation has higher accuracy than previous pure-viscoacoustic TTI wave equations in describing qP-wave kinematic and attenuation characteristics.Additionally,the numerical experiment in a simple two-layer model shows that the HFDLRD technique outperforms the hybrid finite-difference and pseudo-spectral(HFDPS)method in terms of accuracy of wavefield modeling.

Pure-viscoacoustic TTI wave equationAttenuation anisotropySeismic modelingLow-rank decomposition method

Qiang Mao、Jian-Ping Huang、Xin-Ru Mu、Ji-Dong Yang、Yu-Jian Zhang

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Geosciences Department,China University of Petroleum(East China),Qingdao,266580,Shandong,China

Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao,266207,Shandong,China

Marine Science and Technology Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology(QingMajor Scientific and Technological Projects of Shandong Energy Group国家自然科学基金创新研究群体项目National Natural Science Foundation of China Outstanding Youth Science Fund Project(Overseas)

2021QNLM020001SNKJ2022A06-R2341821002ZX20230152

2024

10.1016/j.petsci.2023.11.005

石油科学(英文版)
中国石油大学（北京）

石油科学(英文版)

EI
影响因子：0.88
ISSN：1672-5107
年,卷(期)：2024.21(2)