Parallel WNAD Algorithm for Solving 3D Elastic Equation and Its Wavefield Simulations in TI Media
详细信息
- 责任者：Song Guojie (Department of Mathematical Sciences ; Tsinghua University ; Beijing 100084 ; China) ; Yang Dinghui
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(2)
- 关键词：弹性波 ; elastic waves ; 波动方程 ; wave equation
- 页码：p.547-559
- 图表：9 illus., 1 tbale, 28 refs.
- 分类号：1600
- 出版序号：20130485
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
The accurate modeling of elastic wave propagation in TTI media is significantly important for the study of the anisotropy, amplitude versus offset (AVO) analysis,and other inverse problems. A new numerical algorithm named parallel weighted nearly-analytical discrete (WNAD) method is presented in this paper. As an extension of 2D WNAD, the parallel WNAD method is a fast and efficient algorithm for simulating the elastic wave propagation in TTI media. The authors first show how to formulate the 3D WNAD method, and then compare the wavefield generated by this method with the wavefield computed by a conventional staggered-grid method. The numerical results show that the WNAD algorithm is more suitable for the simulations of the large-scale seismic wavefield by using the high-performance computers.