Local Angle Domain Target Oriented Illumination Analysis and Imaging Using Beamlets

详细信息   

• 责任者：Geng Yu (Institute of Wave and Information ; School of Electronic and Information Engineering ; Xi’an Jiaotong University ; Xi’an 710049 ; China) ; Mao Jian
• 刊名：Chinese Journal of Geophysics
• 出版年：2012
• 卷期：55(3)
• 关键词：地震偏移 ; seismic migration
• 页码：p.981-990
• 图表：4 illus., 26 refs.
• 分类号：1600
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

Prestack depth migration has been widely used for seismic imaging recently. However,the imaging of sub-salt structure is still a hard issue even in true velocity model. In this paper, the authors use local angle domain target oriented illumination analysis to study how the acquisition geometry affects the image quality, especially for some reflectors with certain dip angle in the sub-salt area. Numerical tests based on 2D SEG/EAGE salt model help us to better understand the capability of prestack migration under the given acquisition system. This analysis can also provide us an easy and efficient way to do target-oriented migration for the given reflector.