速度分析和层析成像

地震波速度是地震勘探中最重要的参数之一。通过对第65届EAEG年会上发表的20多篇相关文章的归纳和总结，介绍了求取地震波速度的若干方法，如：沿层速度分析、层析成像速度分析、波动方程速度分析及应用地质统计法对速度分析作质量控制等。层析成像是一种重要的反演方法，它能提供精确的旅行时和宏观速度模型，为复杂构造的成像创造了有利条件，但在应用层析成像方法时仍有许多问题有待解决，如：数据拾取和计算效率问题。介绍了解决这些问题的一些方法。

Advances in velocity analysis and tomography

Seismic velocity is one of the most important parameters in seismic exploration for oil and gas. This paper briefly introduced some advances in velocity analysis based on a review of more than 20 papers published at 65th EAEG annual meeting. The methods for determination of seismic velocity discussed in the paper included horizon based velocity analysis, tomographic velocity analysis, wave equation velocity analysis and application of geostatistical methods in quality control of velocity estimation. As an important inversion method, tomography can generate accurate travel times and macro velocity models, which facilitates the imaging for complex subsurface structures. However, there are some problems yet to be resolved in application of tomographic methods, such as data picking and computation efficiency. Some solutions were described in the paper.