北黄海盆地反射地震勘探中折射波资料的应用

Application of refraction data in reflection exploration in North Yellow Sea

广州海洋地质调查局资料处理研究所,广东广州 510760

Data Processing Center, Guangzhou Marine Geological Survey, Guangzhou 510760, China

在反射波地震勘探中,一般会将折射波作为干扰波而在资料处理中将其切除掉。详细分析了折射波与反射波时距曲线的区别与联系,发现折射波视速度与下伏介质速度密切相关。北黄海盆地的几个应用实例表明,在反射波地震勘探中,充分利用折射波资料,不仅可以协助处理人员快速定洼,有效选择处理模块,还可得到反射地震勘探不能获取的基底速度资料,使勘探精度得到提高,并使常规地震勘探的信息得以充分利用。

Refraction wave is often considered as interfering wave in reflection seismic exploration. The author analyzed the difference and connection between travel time curves of the refraction wave and reflection wave. It is demonstrated with examples that making full use of refraction data in reflection survey can improve efficiency and accuracy of seismic exploration greatly. It can also make the interpretation of seismic data more efficiency.