摘要
本文提出一种可同时计算长波长和短波长折射静校正量的新方法。它根据共中心点道集的折射初至旅行时方程 ,求取地震剖面的长波长静校正量和折射层速度 ,然后从原初至旅行时中减去长波长延时 ,得到仅与短波长有关的剩余折射旅行时 ,再对剩余折射旅行时进行正交分解 ,求出各炮点和检波点的短波长静校正量。实际资料处理结果表明 ,本方法简便、收敛快、精度高。
The paper presented a new method for refraction statics which can simultaneously calculate long wavelength and short wavelength. According to first break travel time equation of refraction on CMP gather, the method evaluates variation of long wavelength statics and velocity of refracting horizon on seismic section. Then, time delay in long wavelength is subtracted from original first break travel time and residual refraction travel time only related with short wavelength is obtained. The short wavelength statics at each shot and receiver point is evaluated after orthogonal decomposition of residual refraction travel time. The real data processing shows that the method is simple, fast convergent and high accurate.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2001年第3期297-300,318,共5页
Oil Geophysical Prospecting
