六盘山地区静校正处理技术

Static correction technology in Liupanshan area

六盘山区域因为地表条件复杂而使得解决该地区的静校正问题比较棘手。文中采用综合静校正方法,首先通过应用基于能量法的初至拾取方法拾取到准确的初至,然后应用层析静校正解决因为地形起伏和黄土沉积厚度变化而引起的较大量的静校正问题,进一步应用初至波剩余静校正解决反演模型与实际地表模型差异所造成的静校正问题,最后应用反射波剩余静校正解决残存的剩余静校正量。通过综合应用多种静校正方法之后,该地区的静校正问题得以解决,最终处理的剖面在信噪比、连续性、波组特征、分辨率等各方面均能够满足后续解释的需要。

Because of the complex surface conditions in Liupanshan area,it is difficult to solve the problem of static correction.In this paper,the comprehensive static correction method is used.Firstly,the accurate first arrival is picked up by using the first arrival pick-up method based on energy method,Then,the tomographic static correction is applied to solve a large number of static correction problems caused by topographic relief and loess sedimentary thickness change,The static correction problem caused by the difference between the inversion model and the actual surface model is solved by using the residual static correction of the first break,Finally,the residual statics of reflection wave is used to solve the residual statics.Through the comprehensive application of various static correction methods,the problem of static correction in this area can be solved;The final processed section can meet the needs of subsequent interpretation in signal-to-noise ratio,continuity,wave group characteristics,resolution and other aspects.