摘要
如何由地震资料及测井资料确定井旁道地震子波是求取井旁道地层波阻抗的关键。本文在详细研究Ri-etsch确定地震子波长度方法的基础上,依据离散反演理论,并考虑到子波在空间变化的特点,提出了一种井旁道地震子波精细提取方法:1由多道相关法提取初始子波的振幅谱;2结合测井资料确定初始子波的相位谱;3根据离散反演理论。
How to determine the seismic wavelet at uphole trace from seismic data and logging data is the key of wave impedance of formation at uphole trace.On the basis of detailed studying the method of determining seismic wavelet's length proposed by Mr.Rietsch,the paper presented a method for fine picking the seismic wavelet at uphole trace based on discrete inversion theory and considering spatial variation of wavelet:①the amplitude spectrum of preliminary wavelet is picked up from multi-channel correlation method;②phase spectrum of preliminary wavelet is determined combining with logging data;③finely resolving seismic wavelet at uphole trace by iterative computation based on discrete inversion theory.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2005年第2期158-162,共5页
Oil Geophysical Prospecting
