约束初至拾取与初至波剩余静校正

Constrained first-arrival pickup and first-break residual static correction

针对复杂地表地区资料处理，本文对现有的各种静校正技术作了简单分析后，提出了一种切实可行的处理流程，采用了各种静校正技术：野外一次静校正、初至波剩余静校正、自动剩余位校正；同时，介绍了一种特别适合于复杂地区资料的初至拾取方法，即约束初至拾取。为了减少野外静校正对速度分析和水平叠加的影响，本文从理论上证明了应用初至波剩余静校正量时应重新计算CMP参考面。实际资料处理表明，本文提出的静校正处理流程是可行的。

In view of data processing in complex surface area, simple analysis has beenmade on various static correction methods in this paper; and a feasible processingflow is given, which involves the static correction techniques: field primary staticcorrection, first--break residual statics and automatic residual statics. The papergives an introduction to first--arrival pickup method, i. e., constrained first--arrivalpickup which is specially applicable to data in complex area. To reduce the effect offield static correction on both velocity analysis and horizontal stacking, the authordemonstrates theoretically that CMP reference plane must be recalculated for thereasonable use of first--break residual static corrections. Practical data processingshows that the static correction processing flow given in this paper is feasible.