地震数据处理中的高频速度分析研究

地震波传播过程中的频散现象造成不同频率的波在地层中传播的速度不同，应用不同频率的数据进行速度分析荻取的速度值也有所差异。速度分析的精度依赖于最大炮检距处的剩余时差与反射波视周期的比值。从理论模型数据出发，对不同频带的数据进行速度分析研究，以说明频带范围对速度精度的影响。实际数据试验结果表明，在静校正问题基本解决、高频记录信噪比较高的前提下，将数据中的高频成分用于速度分析可获得较高的速度精度和分辨率。

The Study of High Frequency Velocity Analysis in Seismic Data Processing

The dispersion phenomenon in seismic wave propagation results in the waves of different frequencies having different traveling velocities. Therefore the velocities obtaining by velocity analysis are different by using data in different frequencies. In addition, the accuracy of the velocity analysis depends on the ratio of the redundancy movement at the position of maximum source--receiver offset to the apparent period of the reflected waves. According to these, this paper presents the velocity analysis results by using data in different frequency ranges from the synthetic model data, in order to show the affect of these frequency ranges on the velocity accuracy. The experiment results show that under the condition of static correction being good and the signal to noise ratio of high frequency being high, the higher accuracy and resolution can be achieved by using the high frequency components in velocity analysis.