正交迭代静校正方法  

Static correction using orthogonal iteration

作　　者：李章明[1] 刘贤功[1] 王顺国[1] 梁秀文[2] 

机构地区：[1]石油地球物理勘探局第二地调处 [2]西北地质研究所

出　　处：《石油地球物理勘探》1997年第1期124-129,共6页Oil Geophysical Prospecting

摘　　要：本方法以野外获得的表层调查资料和野外静校正量作为初始条件，经初至拾取、道集分选后，以高速层顶板为基准面，在共炮点、共接收点和共炮检距三个域内分别提取剩余时差，进而对大量的数据体进行统计，利用正交迭代求取出全局最优化的剩余静校正量。然后将计算结果在道集上反复地检验、调整、剔除异常值，直至得到最佳的高速层顶板静校正量。该结果与基准面校正量合在一起即可作为最终的静校正成果供后续处理使用。The field near-surface data and field static correction data are used as the initialcondition of the method. After both first break pickup and trace gathering are fini-shed, the residual time shifts in common-shot,common-receiver and common offsetdomains can be known respectively by taking the top of high velocity layer as thedatum. Thus, the global optimized residual static correction values are estimated bydoing statistics of great deal of data and by making orthogonal iteration- Then theestimated values are repeatedly revised by applying them to trace gathers until wehave the optimum static correction values of the datum top. This result plus datumcorrection values forms the final static correction values for following data process-ing-

关 键 词：静校正 正交迭代 地震勘探 

分 类 号：P631.44[天文地球—地质矿产勘探]