Solving the frequency-domain acoustic VTI wave equation using physics-informed neural networks

C Song, T Alkhalifah, UB Waheed - Geophysical Journal …, 2021 - academic.oup.com
Frequency-domain wavefield solutions corresponding to the anisotropic acoustic wave
equation can be used to describe the anisotropic nature of the Earth. To solve a frequency …

Recursive integral time-extrapolation methods for waves: A comparative review

X Du, PJ Fowler, RP Fletcher - Geophysics, 2014 - library.seg.org
We compared several families of algorithms for recursive integral time-extrapolation (RITE)
algorithms for waves in isotropic and anisotropic media. These methods allow simulating …

Fast algorithms for elastic-wave-mode separation and vector decomposition using low-rank approximation for anisotropic media

J Cheng, S Fomel - Geophysics, 2014 - library.seg.org
Wave-mode separation and vector decomposition are significantly more expensive than
wavefield extrapolation and are the computational bottleneck for elastic reverse time …

New acoustic approximation for transversely isotropic media with a vertical symmetry axis

S Xu, A Stovas, T Alkhalifah, H Mikada - Geophysics, 2020 - pubs.geoscienceworld.org
Seismic data processing in the elastic anisotropic model is complicated due to
multiparameter dependency. Approximations to the P-wave kinematics are necessary for …

Viscoelastic wave simulation with high temporal accuracy using frequency-dependent complex velocity

Y Zhang, Y Liu, S Xu - Surveys in Geophysics, 2021 - Springer
In recent decades, the study of seismic attenuation has received more and more concerns
because it can stimulate the development of wave propagation simulation and improve the …

An iterative, fast-sweeping-based eikonal solver for 3D tilted anisotropic media

UB Waheed, CE Yarman, G Flagg - Geophysics, 2015 - library.seg.org
Computation of first-arrival traveltimes for quasi-P waves in the presence of anisotropy is
important for high-end near-surface modeling, microseismic-source localization, and …

Azimuthally dependent kinematic properties of orthorhombic media

A Stovas - Geophysics, 2015 - library.seg.org
An orthorhombic velocity model covers anisotropy and vertical/horizontal heterogeneity in
the uniform 3D framework. It is important to define the azimuthal dependence of kinematic …

Elastic orthorhombic anisotropic parameter inversion: An analysis of parameterization

JW Oh, T Alkhalifah - Geophysics, 2016 - pubs.geoscienceworld.org
The resolution of a multiparameter full-waveform inversion (FWI) is highly influenced by the
parameterization used in the inversion algorithm, as well as the data quality and the …

[HTML][HTML] 从成像到反演: 叠前深度偏移的理论, 实践与发展

张宇 - 石油物探, 2018 - xml-data.org
早期地震偏移的目标是通过寻找地下反射面的位置来落实井位. 经过半个多世纪的发展,
地震偏移技术日趋精深. 特别是随着叠前深度偏移的广泛应用, 地震偏移结果为解释人员进行 …

[HTML][HTML] 基于Low-rank 分解的复杂TI 介质纯qP 波正演模拟与逆时偏移

黄金强, 李振春 - 地球物理学报, 2017 - html.rhhz.net
近年来, 面向实际应用的TI 介质准P 波正演模拟与逆时偏移成像技术受到空前的关注.
基于常规耦合型传播方程的正演模拟方法不仅存在伪横波及频散假象干扰, 而且还遭受模型参数 …