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Keywords: tti media
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Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582073
... and the efficiency of the proposed modeling scheme for homogeneous, two half-space TTI media and for the BP 2007 TTI model. upstream oil & gas conventional method exploration geophysicist 10 acoustic wave equation tti media bp 2007 modelling snapshot optimal operator modeling anisotropic model...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3582095
... equations are then extended to TTI media by computationally efficient than its corresponding following the standard rotation applied to stress coupled 1st-order DWEs, but requires an components. The reduced elastic space in this assumption of locally constant medium paper means that we are limited...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214439
... ABSTRACT We develop an improved scheme for the coefficient estimation in the Fourier finite-difference (FFD) wave-equation migration (WEM) in 3D tilted transversely isotropic (TTI) media. The FFD requires using a group of coefficients to approximate the square root operator that is generated...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17685863
... weaknesses of TTI media based on AVAZ inversion. The damped least squares method, which uses the estimated results from well-logging data as initial constraints during the inversion, is more stable. Tests on synthetic data show that fracture weaknesses parameters are still estimated reasonably with moderate...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17325429
... ABSTRACT Transversely isotropic media with the tilted symmetry axis (TTI) is one of the most important anisotropic media used in seismic prospecting and researches. Therefore, high efficient kinematic ray tracing method in TTI media has significant research and application values. The 21...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17731894
...Adaptive Full Waveform Inversion based on Non-stationary Phase Correction in TTI media Yihua Xuan1, Yong Hu2, Zhenbo Zhang1, Liguo Han2; 1. CNOOC China Ltd. Shenzhen Branch; 2. Jilin University Summary Full waveform inversion (FWI) has become one of the important means for high precision velocity...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17642022
...Scalar Wavefield Time Domain Propagation in 3D TTI Media with Fourier Finite Differences Xiaolei Song , BP SUMMARY I propose a new 3D scalar TTI wave propagation method: TTI Fourier Finite Differences (FFD), a chain operator of FFTs and FDs. It can achieve pseudo-analytical accuracy with about 3...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17658413
... solution for P- and SV-wave slowness vector by simplifying the original 2D problem into a new 1D problem, which reduce the unknown components in the equations. As a result, the only solution for the slowness vector for each wave mode can be find. And this method is applicable for both VTI and TTI media...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13878451
...: Tuesday, October 18, 2016 Start Time: 9:15:00 AM Location: 146 Presentation Type: ORAL tti media seg seg international exposition duveneck reverse time migration complete energy second-order pseudo-acoustic system pseudo-acoustic system tti system migration material parameter reservoir...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13819416
.... Moreover, this method can adapt to TTI media by introducing a phase velocity based raytracing, which will benefit the final imaging result. Consequently, the CWI is an efficient technique for seismic imaging and velocity model building. It is a key step for integration of imaging and velocity inversion...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5863984
... Summary Developing an accurate and efficient eikonal solver for heterogeneous tilted transversely isotropic (TTI) media is quite important for modeling, traveltime tomography or beam migration. We propose to solve the complex TTI eikonal equation through an iterative method based...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5910360
... Summary In this paper, we propose stable low-order Absorbing Boundary Conditions (ABC) for elastic TTI modeling. Their derivation is justified in elliptic TTI media but it turns out that they are directly usable to non-elliptic TTI configurations. Numerical experiments are performed by using...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5856363
... the effect of migration seriously. So, in this paper, based on the dissipation mechanism of standard linear solid model, we derive a pure viscoacoustic wave equation of TTI media in the time domain, which describes the attenuation characteristics of seismic wave by a Pseudodifferential operators...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0794
... Summary The anisotropy exists widely underground, and the existence of tilted transversely isotropic (TTI) media is more general in the actual anisotropic formation. Considering the advantages of rotated staggered-grid finite-difference (RSFD), we always use it to solve the anisotropic wave...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0295
... Summary We develop a fast reverse time migration (RTM) in tilted transversely isotropic (TTI) media. It is based on the new quasi-P wave equation proposed by Xu and Zhou (2014). Unlike the conventional TTI RTM, which solves the coupled wave equations and its computation cost is much higher...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0291
... media frequency zero-frequency limit discontinuity tti media stova vertical slowness reservoir characterization anisotropy application upstream oil & gas media roganov slowness effective medium wave propagation horizontal slowness strong contrast effective slowness Low-frequency...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1052
... 3D Fourier finite difference migration algorithm for 3D tilted transversely isotropic (TTI) media. The expansion atom in the FFD approximation to the TTI dispersion surface has up to 3rd power of horizontal wave number with 4, 5, or 6 coefficients for each atom at the user s choice. A 7-point stencil...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-0185
... and is a natural extension of the wave equations in VTI and TTI media. We compute the reverse time migration impulse responses for tilted orthorhombic media and demonstrate that our method provides stable and high quality RTM images in more general anisotropy media. migration order wave equation media...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-0168
... ABSTRACT In this paper, a pure P wave equation for an acoustic 2D TTI media is derived. Compared with conventional TTI coupled equations, the resulting equation is unconditionally stable due to the complete isolation of the SV wave mode. To avoid numerical dispersion and produce high quality...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-3393
... ABSTRACT Pseudo-acoustic wave equations are usually used in reverse-time migration (RTM) for TI media. The acoustic wave equations for TTI media are much more complicated than those for isotropic and VTI media. To ensure a stable computation, the pseudo-S velocity along the symmetry axis...

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