中山大学学报自然科学版 ›› 2011, Vol. 50 ›› Issue (6): 43-47.

• 研究论文 • 上一篇    下一篇

一种PS波与PP波反射时间匹配方法

李生杰1,2,张春涛1   

  1. (1.中国石油大学油气资源与探测国家重点实验室,北京 102249;2. 中国石油大学CNPC物探重点实验室, 北京 102249)
  • 收稿日期:2011-06-15 修回日期:1900-01-01 出版日期:2011-11-25 发布日期:2011-11-25

A Method for PS to PP Reflection Time Mapping

LI Shengjie1,2,ZHANG Chuntao1

  

  1. (1. State Key Lab of Petroleum Resources and Prospecting, China Univerity of Petroleum, Beijing 102249, China;2. CNPC Key Lab of Geophsical Prospecting, China University of Petroleum, Beijing 102249, China)
  • Received:2011-06-15 Revised:1900-01-01 Online:2011-11-25 Published:2011-11-25

摘要: 多波多分量地震资料解释中, 反射纵波与转换横波反射时间关系是影响地震储层预测的关键因素之一。该文在前人研究工作基础上,提出了利用转换波叠前道集进行纵横波速度比提取及纵波与转换横波反射时间匹配处理方法。模型资料计算结果表明,文中所述方法可以直接由转换波道集计算得到横波速度、纵横波速度比等参数,应用这些参数可实现纵波与转换波反射时间匹配处理。该方法具有一定的计算精度,特别适合于水平层状地层多波多分量资料处理。

关键词: 转换波, 速度比, 旅行时间, 时间匹配, 速度扫描

Abstract: PS to PP time mapping is one of key factors affecting seismic reservoir predictions in multicomponent seismic interpretations. Based on prior work, a new method is presented for the ratio of compressional velocity and shear velocity scanning and PS to PP reflection time mapping with using convertedwave prestack data. Model data results show that convertedwave velocity , the ratio of compressional velocity and shear velocity can be obtained directly from convertedwave seismic gathers, and P wave and PS wave reflection time can be automatically matched by means of the method presented. It works well with model data, suits for multicomponent seismic data processing in an area with horizontal formation.

Key words: converted wave, the ratio of velocities, travel time, time mapping, velocity scanning.

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