2024年7月29日 · Transversely isotropic media with a tilted symmetry axis (TTI) exits widely underground due to tectonic movement and mineral orientation. Traditional full waveform inversion (FWI) based on isotropic media or transversely isotropic media with a vertical symmetry axis (VTI) cannot deal with such situations.

2024年1月1日 · We implemented elastic full waveform inversion in TTI media and addressed the parameter coupling issue using the Gauss-Newton (GN) method. Through numerical experiments, we compared the GN method with the preconditioned conjugate gradient (P-CG) method for simultaneous inversion of multiple parameters.

2022年8月1日 · Qiao et al. (2020) develop a viscoacoustic wave equation in TI media, which is expressed with decoupled fractional Laplacians. Zeng et al. (2020) provide the conditions for stratified viscoelastic media.

2020年6月1日 · Based on the two-dimensional (2D) three-component first-order velocity-stress equation, the high order staggered mesh finite difference numerical simulation method was used to simulate the elastic and viscoelastic tilted transversely isotropic (TTI) media.

A new wave equation for P-waves is proposed in tilted transversely isotropic (TTI) media that can be solved as part of an acoustic anisotropic RTM algorithm, using standard explicit finite differencing.

逆时偏移是基于双程波波动方程进行波场逆时外推,再利用成像条件提取成像值,进而实现偏移成像的一种方法.目前,RTM已经由各向同性介质推广到了TI介质,包括VTI介质和TTI介质.考虑了各向异性因素的逆时偏移技术能更好地满足日益增长的勘探精度的要求,进一步 ...

2021年11月19日 · In this paper, we extend the NPML to TTI media and poroelastic media. It is found that considerable energy is returned into the main domain in the form of spurious reflected waves at grazing incidence. The NPML is extremely unstable in some complex media and models. We give five simulation cases, all of which show unstable phenomena.

We present an approach for P-wave modeling in inhomogeneous transversely isotropic media with tilted symmetry axis (TTI media), suitable for anisotropic reverse-time migration. The proposed approach is based on wave equations derived from first principles — the equations of motion and Hooke’s law — under the acoustic TI approximation.

Here, we extend the previously developed time-lapse VTI FWI algorithm to TTI media, which makes it suitable for a wider range of subsurface models. We begin by discussing the FWI methodology for anisotropic media and its application to time-lapse seismic data.

2020年3月9日 · We present an elastic least-squares imaging approach in TTI media for multicomponent land and marine streamer data. Unlike traditional wave-mode separation-based elastic RTM, the proposed elastic TTI LSM parameterizes the wave equation using \ (\Delta \ln {C}_ {33}\) and \ (\Delta \ln {C}_ {55}\) as reflectivity models and estimates them by ...