长波长静校正问题的一种解决方法

A method for long-wavelength static correction.

长波长静校正是地震勘探数据处理中的难题 ,至今尚未圆满解决。本文根据近年来在中国西北地区的工作经验 ,分析出长波长静校正的产生缘于地表低速带厚度或速度的 (横向长波长 )变化 ;提出一种利用折射初至反演低速带的结构来进行长波长静校正的有效方法。模型和实际资料的计算结果证明了该方法的可行性和有效性。

Long-wavelength static correction is a tough problem in seismic data processing, and it has not been solved yet desirably. Exploration experien ce in Northwest China indicates that long-wavelength static correction appears to cope with the lateral “long-wavelength” variation of thickness or seismic velocity of surface low velocity layer. Authors put forward an effective method which achieves long-wavelength static correction by deriving the low-velocity layer structure from refraction first breaks. Modeling and real data processing result prove the method feasible and effective.