分步逐级静校正法在黄土塬地震资料处理中的应用

针对鄂尔多斯盆地南部黄土塬地区地震资料静校正严重的问题,提出一种分步逐级静校正方法.该方法利用网格层析反演静校正方法解决长波长静校正问题;再利用差分法初至波剩余静校正解决部分短波长静校正问题;然后,利用反射波综合全局寻优剩余静校正解决剩余静校正问题.黄土塬实际地震资料应用效果表明,应用文中提出的分步逐级静校正方法获得的地震剖面同相轴连续,一致性好,断点绕射波形态特征明显.使用本方法能够消除黄土塬地区地震资料的静校正问题,获得最佳处理效果.

Static correction and its application to seismic data of loess tableland area

A new method of progressively united static correction is proposed for the serious static correction problem of seismic data of loess tableland area in southern Ordos basin.Firstly,grid tomographic inversion static method is used to solve the problem of long wave-length static;secondly,difference residual static method of first arrival is used to solve the problem of short wavelength static;finally,a new hybrid optimization method for estimating static corrections is put forward to solve residual static problem,which involves energy maximization,simulation annealing and hereditary algorithm.The practical application results of seismic data of loess tableland area show that the events of stack section of applying the above method is continuous with good consistency,and the diffraction wave characteristics of breakpoint are obvious.It is thus held that the progressively united static method can solve the static problem of seismic data obtained in this area.Good processing result can be obtained.