3D Weak-Dispersion Reverse-Time Migration with a StereoModeling Method
Name
Li_J_etal_3D_Weak-Dispersion.pdf
Size
591.85 KB
Format
Adobe PDF
Checksum (MD5)
8c8a7fafbc17f674b1ab15337a6ce83f
Author(s)
Li, Jingshuang
Fehler, Michael
Yang, Dinghui
Huang, Xueyuan
Date Issued
2013
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;2013-31
Abstract
The finite difference method has been widely used in seismic modeling and reverse time migration. However, it generally has two issues: large computational cost and numerical dispersion. Recently, a nearly-analytic discrete operator was developed to approximate the partial differential operators. Based on this spatial discretization, many weak-dispersion and efficient StereoModeling methods have been developed, which are found to be superior to conventional algorithms in suppressing numerical dispersion. In this paper, we generalize one StereoModeling method, the nearly-analytic central difference method (NACD), from 2D to 3D and apply it to 3D reverse-time migration. Numerical results show that the NACD can be used effectively as a new tool for seismic modeling and migration. The reverse time migration (RTM) results for the 3D SEG/EAGE Phase A classic dataset 1 show that the NACD can get a much better image than the Lax-Wendroff correction (LWC) method particularly when using a coarse grid size.
Subjects
Imaging
Migration
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