A fast and robust two-point ray tracing method in layered vertical transversely isotropic media with strong anisotropy

Jiang, Xingda1,2,3,4; Pan, Xiaoyan4; Yang, Huayong1; Zhang, Wei2,4; Chen, Xiaofei2,4

2024-08-01

10.1111/1365-2478.13585

GEOPHYSICAL PROSPECTING   影响因子和分区

0016-8025

1365-2478

A fast and robust two-point ray tracing method was developed for layered vertical transversely isotropic media with strong anisotropy. Utilizing the Christoffel slowness equation, a novel generalized dimensionless ray parameter, qx${{q}_x}$, modified from the ray parameter (horizontal slowness), was proposed to efficiently and simultaneously determine the ray paths and travel times for direct and reflected quasi-P, quasi-SV and quasi-SH waves. The Newton optimization algorithm was employed to solve the nonlinear offset equation accurately, resulting in rapid convergence to the true value. The inferred analytical equations show that the generalized ray parameter stabilizes the inversion process at large offsets. Additionally, a piecewise function was introduced to enhance the initial value estimation and calculation efficiency. The numerical results demonstrate that this novel approach can reduce the iteration error to 10-10 m in less than three iterations. Monte Carlo simulations further validated the effectiveness of the qx${{q}_x}$ method for inferring the true ray paths at various offsets within complex velocity models. Furthermore, the qx${{q}_x}$ method can address the triplication issue in quasi-SV waves and exhibit robustness in strong-layered vertical transversely isotropic media.

Anisotropy Numerical study Rays Seismics Theory

SCI ; EI

英语

通讯

National Natural Science Foundation of China[42074056] ; Guang Dong Basic and Applied Basic Research Foundation[2022A1515110409] ; China Postdoctoral Science Foundation[2023M730782] ; Guangdong Provincial Pearl River Talents Program[2019QN01G801] ; Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology[2022B121201002] ; Shanghai Sheshan National Geophysical Observatory[SSOP202304]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:001285701900001

WILEY

GEOSCIENCES

Web of Science

1.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Geophys High Resolut Imagin, Shenzhen 518055, Guangdong, Peoples R China
3.Shanghai Earthquake Agcy, Shanghai Sheshan Natl Geophys Observ, Shanghai, Peoples R China
4.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Guangdong, Peoples R China

Jiang, Xingda,Pan, Xiaoyan,Yang, Huayong,et al. A fast and robust two-point ray tracing method in layered vertical transversely isotropic media with strong anisotropy[J]. GEOPHYSICAL PROSPECTING,2024.

Jiang, Xingda,Pan, Xiaoyan,Yang, Huayong,Zhang, Wei,&Chen, Xiaofei.(2024).A fast and robust two-point ray tracing method in layered vertical transversely isotropic media with strong anisotropy.GEOPHYSICAL PROSPECTING.

Jiang, Xingda,et al."A fast and robust two-point ray tracing method in layered vertical transversely isotropic media with strong anisotropy".GEOPHYSICAL PROSPECTING (2024).