交互迭代静校正方法

The method of static correction by interactive iteration

1. 中国地质大学（北京）, 北京 100083;2. 河南石油勘探局地调处物探研究所, 南阳 473132

China University of Geosciences, Beijing 100083

在风化层横向变化剧烈的地区, 传统静校正方法难以得到满意的结果。本文提出一种用大炮初至时间计算静夜正量的新方法, 它是在共炮点域、共接收点域、共偏移距域分别计算出静校正量, 再把计算出的静校正量回加到共偏移距初至曲线上, 若初至时间曲线足够平滑时, 我们便认为所求得的静校正量是比较准确的。这需要对大量数据进行统计, 用交互、迭代的方法求出全局最优解。本方法已在一些地区得到了成功的应用。

In the areas where the lateral variation of weathered layers is severe, the conventional static correc-tion method is difficult to bring satisfactory results. In the paper, we present a new method to calculatethe static correction values using first atriva times. The static correction values are caculated in commonshot, common reciever, and common offset domains respectively, and then the caculated values areadded back to the common-offset first arriva curves. If the first arrival curves are smooth enough, wethink that the static correction values obtained are relatively accurate. In the method, the global opti-mum solution can be derived by the statistics of enormou data and the interactive iteration. The methodhas ban successfully used in some areas.