TY - GEN
T1 - 3D reverse-time migration with hybrid finite difference-pseudospectral method
AU - Lesage, Anne Cécile
AU - Zhou, Hongbo
AU - Araya-Polo, Mauricio
AU - Cela, Jose Maria
AU - Ortigosa, Francisco
N1 - Publisher Copyright:
Copyright © (2008) by the Society of Exploration Geophysicists All rights reserved.
PY - 2018
Y1 - 2018
N2 - We propose a 3D reverse-time migration (RTM) using an hybrid Finite Difference (FD) pseudospectral algorithm to solve the two-way acoustic equation. This mainly consists of forward-backward 2D FFT in lateral dimensions (x-y plane) and 1D FD in the depth dimension. This algorithm allows us to get high order accuracy and simplifies the computation of cross derivatives. Therefore our RTM allows to deal with the case of 3D isotropic media, VTI media (Zhou et al., 2006b) and 3D TTI media. The 3D TTI media case lies on a new anisotropic wave equations system (Lesage et al., 2008), which is an extension of 3D VTI media (Zhou et al., 2006b) and 2D TTI media equations (Zhou et al., 2006a) of Zhou et al. . This system is based on the combination of two 3D rotations which permits us to deduce 3D TTI equations from 3D VTI equations. In this work, we recall the formalization for 3D isotropic, 3D VTI and 3D TTI media, we also describe the implementation of the method to solve the proposed 3D TTI equations. To validate our proposal, we carry out impulse response experiments for modeling and migration.
AB - We propose a 3D reverse-time migration (RTM) using an hybrid Finite Difference (FD) pseudospectral algorithm to solve the two-way acoustic equation. This mainly consists of forward-backward 2D FFT in lateral dimensions (x-y plane) and 1D FD in the depth dimension. This algorithm allows us to get high order accuracy and simplifies the computation of cross derivatives. Therefore our RTM allows to deal with the case of 3D isotropic media, VTI media (Zhou et al., 2006b) and 3D TTI media. The 3D TTI media case lies on a new anisotropic wave equations system (Lesage et al., 2008), which is an extension of 3D VTI media (Zhou et al., 2006b) and 2D TTI media equations (Zhou et al., 2006a) of Zhou et al. . This system is based on the combination of two 3D rotations which permits us to deduce 3D TTI equations from 3D VTI equations. In this work, we recall the formalization for 3D isotropic, 3D VTI and 3D TTI media, we also describe the implementation of the method to solve the proposed 3D TTI equations. To validate our proposal, we carry out impulse response experiments for modeling and migration.
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M3 - Conference contribution
AN - SCOPUS:85027316187
SN - 9781605607856
T3 - 78th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2008
SP - 2257
EP - 2261
BT - 78th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2008
PB - Society of Exploration Geophysicists
T2 - 78th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2008
Y2 - 9 November 2008 through 14 November 2008
ER -