四阶速度分析与动校正方法及应用效果分析

Method and application of quarticorder velocity analysis and dynamic correction

由于常规速度分析一般忽略计算公式中的四次项 ,因此 ,对于较大偏移距的资料就存在校正时差的问题 ,其速度分析误差影响了资料的叠加质量。文章讨论了四阶速度分析的原理与方法 ,采用将常规速度分析和四阶速度分析相结合的方法 ,解决了远偏移距的速度分析与动校正问题。并对实际地震资料进行了处理。

Since general velocity analysis often ignores the quartic item of equation, time difference should be corrected for the data of the far offset distance, and its velocity analysis error influences the stacking quality of data. In this paper, principle and method of the quarticorder velocity analysis are discussed, the velocity analysis and dynamic correction of the far offset distance are solved by using the method in which general velocity analysis combined with quarticorder velocity analysis. And the real seismic data are processed.