利用覆盖次数信息构建浮动基准面的方法及应用

在针对复杂地表地区的地震数据处理中 ,通常使用浮动基准面校正法来减少因静校正剧烈变化造成反射波双曲线时距曲线的畸变 ,从而提高地震资料的速度分析精度、信噪比及成像品质。文章对现有的浮动基准面校正法进行理论分析后 ,提出一种利用覆盖次数信息来构造浮动基准面的方法 ,它可以克服现有方法的某些缺陷。实际资料的处理表明 ,该方法在应用中具有比现有方法更合理、更可靠地反映地下地质构造形态的优点。

A Method and Application for Establishing Floating Datum Using Fold Number Imformation

In view of data processing in complex surface area, the method of floating datum for static correction is usually used to minimize the distortion of the hyperbolic characteristic of reflected events resulting from severe fluctuation in static correction,so that the accuracy of volocity analysis,the signal/noise ratio and even the quality of reflection image of seismic data can be improved.Based on theoretical analysis of present correctiom method on floating datum, a new method for establishing floating datum using fold number imformation which can overcome some defects in traditional method is given in this paper.Practical data processing shows that the method has an advantage over the traditional one in reflecting geological structures rationaly and reliably.