摘要
采用脉冲或子波作为震源,利用单程波方程分别将炮点和检波点向下延拓,每延拓一个深度步长对两波场进行零延迟相关,进而采用相关值乘以相关点处的反射系数即得反射波场值。与此同时计算出两波场的时间之和,再根据等时叠加原理,将前面计算的反射波场值在对应的时间和空间位置处进行叠加,即可实现P-S转换波资料的共炮记录正演模拟。若将炮点和检波点位置互换,则可以实现S-P转换波资料的共炮记录模拟。由于该模拟方法在处理过程中无需估算转换点位置,因此模拟资料更客观真实。通过该方法模拟的转换波具有无直达波、多次反射干扰等特点,且具有一定的动力学特征,是复杂构造模拟、多波多分量模拟等的一种简单实用方法。
Using pulse or wavelet as source and one-way wave equation for downward continuation of shot point and receiver point respectively, the zero-delay correlation is carried out for two wave fields in each continuation of one depth step, and further using correlation value multiplied by the reflection coefficient at correlation point to get the value of reflection wavefield. At the same time, the time sum of two wavefields is computed and stack of value of reflection wavefield computed before is carried out in ...
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2008年第5期583-588,487,共7页
Oil Geophysical Prospecting
关键词
单程波方程
转换波
延拓
等时叠加
共炮记录
one-way wave equation
converted wave
continuation
isochronic stack
common shot record