Prestack Time Migration in Anelastic Media Based on Designing for Short Operator
详细信息
- 责任者：Li Xueying (College of Earth Sciences ; Northeast Petroleum University ; Daqing 163318 ; China) ; Lv Xibin
- 刊名：Chinese Journal of Geophysics
- 出版年：2011
- 卷期：54(1)
- 关键词：叠前时间偏移 ; prestack time migration
- 页码：p.193-199
- 图表：6 illus., 31 refs.
- 分类号：1600
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In order to raise the computational efficiency of frequency domain prestack time migration in anelastic media, the high-accuracy optimum short convolution operators in time domain are designed by weighted least squares method. Therefore a table-driven time domain prestack time migration scheme in anelastic media is presented. This scheme can transform large amount of multiplication operation frequency by frequency into less convolution operation in time domain and split calculation of travel time, amplitude and short convolution operator from the inverse Q compensation migration, which greatly improved the computational efficiency of time-domain pre-stack time migration in anelastic media. A stabilization controlling strategy is proposed to ensure the stability of arithmetic in compensation for absorption and dispersion.