摘要
初至叠加相对静校正方法是在共炮点道集和共检波点道集记录上,先用某一速度将初至波校平叠加,分别得到共炮点和共检波点道集初至波叠加剖面,若存在静校正问题时,则初至相位出现上下错动;然后将错动的初至相位再校正到一条光滑的“趋势线”上,以获取相应的相对静校正量。该方法主要解决常规剩余静校正方法所不能求取的大干1/2周期的剩余静校正量的问题。实际资料处理表明,这一方法是改善表层条件复杂地区地震剖面质量的有效方法。
The principle of relative static correction using first arrival stack is as follows. The first arrival legs of common shot gathers or common receiver gathers are flat- tened using a proper velocity,then stacked to form their first arrival stack sections; when there is still static correction problem,first arrival legs are staggered (uncon- nected);the unconnected first arrival legs are then corrected to a smooth “tendency line”so as to find proper relative static corrections.This method is mainly used to calculate the residual static corrections which are bigger than half period and can not be obtained by using conventional static correction methods.Real data processing shows that this method is an effectual one for improving the seismic sections within a surface complicated area.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1993年第2期226-231,共6页
Oil Geophysical Prospecting
关键词
相对静校正
初至叠加
地震剖面
relative static correction
first arrival stack
first break time
