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建立地震速度场的数据主要来源于速度谱，速度的影响因素较复杂，而由速度谱数据过渡到地层的层速度与平均速度的各种方法都存在一定的局限性。在速度数据体中，异常数据较多。地震速度场的平均值与中值滤波趋势分析能较好地压制速度场中的异常数据和提高速度场数据的精度。用这种分析方法对某盆地Ｙ构造带Ｔ８层的平均速度数据进行了处理，效果十分显著。
The data of the establishment of the seismic velocity field mainly come from the velocity spectrum, and the influencing factors of the velocity are complicated. However, there are some limitations to the methods of the transition from the velocity spectrum data to the formation velocity and the average velocity. In the speed data body, there is more abnormal data. The mean and median filtering trend analysis of seismic velocity field can suppress the anomaly data in the velocity field and improve the accuracy of the velocity field data well. Using this analysis method, the average velocity data of the T8 layer in the Y-structural belt of a certain basin has been treated and the effect is very significant.