对τ-p变换中几个问题的探讨

SOME PROBLEMS CONCERNING THE τ-p TRANSFORMATION

江汉油田石油地质调查处

本文在对τ—p变换原理作了简略介绍的基础上,从理论上详细讨论了τ—p变换中假频和端点效应的形成原理,提出了一整套消除假频和端点效应的方法技术,其中,特别是值得指出的是变速介质中的反假频自适应加权倾斜叠加方法和自动切除技术。通过模型试验资料对各种方法的效果作了对比验证。另外,作者还对τ—p域内动校正问题作了理论分析和模型试验,提出了水平层状介质条件下的动校正公式。这就疏通了直接在τ—p域内进行动校、叠加以及作速度分析的渠道。

In this paper, the principle of τ-p transformation was introduced concisely, the causes and foundations of the forming of alias and end-point effects were fully discussed in theory and the ways of cancellation and ilimilation of them were presented as well. Among them, anti-alias self-adaptive weighted slant stack method and the technique of auto-truncation were specially worth to be mentioning. The effects resulted from different methods were compared and verified carefully.Besides, the theoretical analysis and the model experiments for the dynamic correction in τ-p domain were carried out by the authors, the formulae of dynamic correction under the condition of horizontal layered medium were presented. Thus, It is possible for us to accomplish the dynamic correction, the stack as well as the velocity analysis directly in τ-p domain.