The Algorithm of High Order Finite Difference Pre-Stack Reverse Time Migration and GPU Implementation
详细信息
- 责任者：Liu Hongwei (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Li Bo
- 刊名：Chinese Journal of Geophysics
- 出版年：2010
- 卷期：53(7)
- 关键词：叠前偏移 ; prestack migration ; 有限差分法 ; finite difference methods
- 页码：p.1725-1733
- 图表：10 illus., 39 refs.
- 分类号：1600
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In this paper, the authors illustrate the implementation process of RTM and analyze the stability condition and dispersion relation of finite difference (FD) method. For the problem of intensive computation cost, the authors use the Graphic Processing Unit (GPU) architecture to realize RTM and get an order of magnitude higher speedup ratio compared to the traditional CPU architecture. Compared to the one way wave equation migration methods, RTM does not have the imaging dip limit and the imaging effect is significantly improved. The test on vertical fault and BP models proves this conclusion.