对在西北地区复杂地表条件下获得的地震资料的处理中 ,静校正和基准面的选择是影响处理效果的关键技术环节。根据多年山地地震资料处理工作的实践 ,提出了用野外地表调查参数与折射波静校正相结合的方法剥去低降速带到高速带顶界、将数据校正到一个固定基准面、进行高频和低频分离、在 CMP面上求取速度、进行叠加 ,然后用固定基准面偏移法解决好偏移基准面问题。真正解决好这一问题的最终出路是在深度域从地表开始进行偏移。

Static correction and choosing datum are the key factors that directly affect the quality of the image when processing the seismic data acquired in Chinese northwest with complicated surface conditions. According to the experience of processing the land seismic data in recent years, the method of combination the surface parameters investigated in the field and refraction static correction is put forward. Firstly, atripping the layer with low-velocity to the top interface of the first layer with high velocity. Secondly, correcting the data to a final datum. Thirdly, separating the static correction values into two components, the long-wave length part and the short-wave length part. And then using the velocity derived from the CMP datum to stack the seismic data. Finally, migrating the stack data in the final datum, then the migration datum can be solved correctly in this way. Frankly the very way to solve the static correction accurately is tomigrate the data from the surface in depth domain.