Time‐migration velocity analysis by velocity continuation
Time‐migration velocity analysis by velocity continuation
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DOI：
10.1190/1.1620640
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发表时间：
2003-09
期刊：
影响因子：
3.3
通讯作者：
Sergey Fomel
中科院分区：
文献类型：
--
作者：
Sergey Fomel
时间偏移速度分析可以通过速度延拓来执行，速度延拓是根据偏移速度的变化对偏移地震剖面进行变换的增量过程。通过适当地考虑地震图像上事件的垂直和横向运动，速度延拓增强了剩余正常时差校正。有限差分和谱算法为速度延拓提供了有效的实用实现。合成数据和现场数据算例验证了该方法的性能，并证实了理论预期。
Time-migration velocity analysis can be performed by velocity continuation, an incremental process that transforms migrated seismic sections according to changes in the migration velocity. Velocity continuation enhances residual normal moveout correction by properly taking into account both vertical and lateral movements of events on seismic images. Finite-difference and spectral algorithms provide efficient practical implementations for velocity continuation. Synthetic and field data examples demonstrate the performance of the method and confirm theoretical expectations.