Two Prestack Time Migration Methods of Different Summation Paths
详细信息
- 责任者：Ma Ting (School of Geological Engineering and Geomatics ; Chang’an University ; Xi’an 710054 ; China) ; Zhou Xueming
- 刊名：Geophysical and Geochemical Exploration
- 出版年：2012
- 卷期：36(2)
- 关键词：叠前时间偏移 ; prestack time migration
- 页码：p.321-324
- 图表：9 illus., 9 refs.
- 分类号：1600
- issnNo：ISSN1000-8918
- isbnNo：CN11-1906/P
摘要
This paper describes the basic principle of Equivalent Offset Migration and Non-Imaging Shot-Record Migration. They both replace the usual offset coordinate with a new offset variable. The result of prestack time migration is followed by NMO and stack over the hyperbolic traveltime curve defined by the new offset variable. It is realized that prestack time migration is diffraction summation over the traveltime surface described by the double square root equation. The difference between the two methods is that they define different summation paths over the traveltime surface. The two methods can used to seismic imaging in the metal ores exploration.