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常规静校正方法是先做低降速带校正,再做从高速层顶界面到统一基准面的校正。当高速层顶界面起伏剧烈和高速层速度横向变化较大时,这种静校正计算方法就不能很好解决静校正问题。中间参考面静校正技术是在静校正计算时,在高速层顶界面之下引入一个圆滑的参考面,这样可以在低降速带校正的基础上进一步提高静校正精度,确保成像效果和构造精度。该项技术在中国西部复杂地表区推广应用后取得了良好的效果。本文系统介绍了中间参考面的意义、应用条件及参数的选取,同时展示了部分典型效果对比资料。
Conventional static correction method is to do the first low-speed correction with the correction, and then do from the top of the high-speed interface to a unified reference plane calibration. This static correction method can not solve the problem of static correction very well when the top interface of the high-velocity layer fluctuates sharply and the lateral velocity of the high-velocity layer changes greatly. The middle reference surface static correction technology introduces a smooth reference surface below the top interface of the high velocity layer during static correction calculation so as to further improve the static correction accuracy on the basis of the low deceleration correction to ensure the imaging effect and the construction accuracy . The technology has achieved good results after the popularization and application of complex surface areas in western China. This paper systematically introduces the meaning of the intermediate reference surface, the application conditions and the selection of the parameters, at the same time shows some typical results comparison data.