转换波勘探的若干问题

Problems of Converted P-SV-Waves Exploration

根据江苏和四川油区转换波勘探试验的结果，作者讨论了转换波应用中的四个问题，首先由大量的ＡＶＯ曲线的分析，提出了主转换波的概念，确定了主转换波的波型；确定了接收主转换波的最佳采集范围。其次讨论了在实际地震图中如何识别转换波。然后，文中介绍了转换波共转换点（ＣＣＰ）叠加的一步法［１］，将反射点精确归位、非双曲线动校和ＣＣＰ叠加一步完成。最后讨论了转换波剖面的地质意义。

Four problems about the application of converted A-SV-Waves seismic explorationare discussed in this paper on the basis of the results of P-SV-Waves survey tests in Jiang su and Sichuan provinces. First,the conception of dominant converted wave is presented according to a large amount of AVO curve analysis and its pattern and optimum gatheringrange are determined.Second, the distinquishing of converted wave is discussed in seismicrecords and profiles. Third, one-step method of common conversion point (cop) atack is introduced, which can complete reflection point migration, non-hyperbolic moveout and copstack procedures at the same time. Finally, the geological significance of converted .waveseismic section is discussed.