A new acoustic traveltime approximation for attenuating transversely isotropic media

Xiao, Han; Wang, Deli

doi:10.1007/s11600-021-00630-5

Artykuł - szczegóły

Tytuł artykułu

A new acoustic traveltime approximation for attenuating transversely isotropic media

Autorzy

Xiao Han , Wang Deli

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-021-00630-5

Warianty tytułu

Języki publikacji

Abstrakty

Attenuation is one of the most important quantities in describing seismic wave propagation, which is also anisotropic because of the dispersion relationship between the seismic wave and the symmetry direction. Transverse isotropic media with titled symmetry-axis (TTI) is a widespread approximation of the Earth’s surface. For 2D TTI attenuating media, we frstly use the acoustic assumption to simplify the exact eikonal equation for the complex-valued quasi P-wave traveltime. Then we design a perturbation method to obtain the new approximation by solving the acoustic attenuating eikonal equation of TTI media and use Shanks transform to increase precision. Compared with former studies, the new approximation considers the symmetryaxis angles of the media as a factor, which will improve its robustness. The approximation is tested in several medium to demonstrate its efectiveness. The energy velocity which derived by the steepest-descent method is used to calculate the exact complex-valued traveltime. We test the accuracy of the approximations developed with and without Shanks transform in the following. Finally, we discussed the possibility to apply this approximation to the methods like fast marching methods.

Słowa kluczowe

attenuation TTI acoustics perturbation Shanks transform

osłabienie TTI akustyka perturbacja transformacja Shanksa

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2021

Tom

Vol. 69, no. 5

Strony

1611--1621

Opis fizyczny

Bibliogr. 34 poz.

Twórcy

autor

Xiao Han

xiaohan15@mails.jlu.edu.cn

College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

https://orcid.org/0000-0002-4127-7546

autor

Wang Deli

College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikator YADDA

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