| 摘要: |
| 以单程波方程为基础推导转换波保幅的虚拟偏移距(P0M)方法的权函数，在P0M道集映射过程中直接实现 保幅。保幅的pom叠前偏移方法不但简化了转换波的处理流程，提卨r覆盖次数和信噪比,而&在偏移过程中体现 出来了对振幅的定量分析。结果表明,无论是水平层还是大倾角地层转换波的P()M法都能使构造进行准确成像，并 且使偏移后的振幅体现反射系数的信息。 |
| 关键词: 振幅保持 转换波 虚拟偏移距法 叠前偏移 |
| DOI： |
| 分类号: |
| 基金项目:中国石油天然气集团公司科技开发项H (06B10501) |
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| Converted wave amplitude-preserving prestack migration by pseudo-offset migration |
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ZHANG Li-yan, LIU Yang, CHEN Xiao-hong
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(CNPC Geophysical Exploration Key Laboratory in China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| Converted-wave amplitude-preserving weighting function by pseudo-offset migration (POM) was deducted based on single way wave equation, and amplitude-preserving was performed in the mapping POM gathers directly Amplitude-preserving POM prestack migration not only simplifies conventional processing procedure and improves fold and signal-to-noise ratio, but also achieves ampiitude quantitative analysis during migration. The results show that the converted-wave POM can accurately image tlie structure for whether flat layers or dipping layers，meanwhile the reflectivity could be indicated by the amplitude peak value of migrated section. |
| Key words: amplitude-preserving converted wave pseudo-offset migration (POM) prestack migration |
