不同速度分析方法联合应用研究

Combined application of different velocity analysis methods

当地下地质构造复杂、地层存在各向异性现象及地震采集偏移距大时,地震波传播的时距关系不再遵循双曲线时距方程,常规速度分析方法难以满足工作要求。通过对现有各种速度分析手段的原理、适用条件及应用方法进行研究,提出了"各向异性速度分析、沿层速度分析和空间连续速度分析"的联合应用方法,指出其适用范围并建立了处理流程。实际应用表明该方法能够提高复杂地区地震速度分析精度。

Due to the complex geological structure ,stratum anisotropy ,large offset distance of seismic acquisition ,the seismic wave can not be propagating according to the hyperbolic time -distance equation .Thus conventional velocity analy-sis methods are difficult to meet the exploration requirements .By studying principles ,application conditions and methods for different existing velocity analysis methods , a combination application of different velocity analysis methods was pro-posed ,which includes the anisotropic velocity analysis ,the velocity analysis along the layer and the spatial continuous ve-locity analysis .And the application scope was pointed out ,and the process flow was established .The practical application showed that the method can improve the accuracy of seismic velocity analysis for complex area .