摘要
相位相关统计高分辨率速度分析是利用地震信号瞬时相位的相关特性，计算叠加速度谱。地震信号的瞬时相位，可以看作是二维复平面上的方向数据。根据概率统计假设检验原理，建立两个统计假设检验，分别称为Ｒ检验和Ｖ检验，再利用这两个假设检验所得的两个统计量的概率，构造速度谱的度量函数。同时，由于速度谱的计算可以逐个样点进行，因此，度量函数中可同时包含常规叠加能量的瞬时信息。文中对该方法的原理进行了详细地描述，利用理论记录和实际资料进行了试算，并与常规速度谱做了比较。结果表明，该方法是稳健的、实用的，与常规方法相比，具有更高的速度和时间分辨率。
Using instantaneous phases correlation characteristic of seismic signal, highresolution velocity analysis by phase correlation statistics calculates stack velocity spectrum. The instantaneous phases of seismic signal can be treated as directional data in a 2-D complex plane. Building two statistical hypothetical tests according to hypothetical test principle in probabilistic method that are called R test and V test separately and using these probability of two statistical figures resulted from above hypothetical tests,the measuring function of velocity spectrum can be constructed. Meanwhile,instantaneous information on conventional stack power can be involved in measuring function simultaneously as calculation of velocity spectrum can be conducted sample by sample. The paper made a detailed description of principle of the method, conducted test and calculation using synthetic and real data and compared with conventional velocity spectrum. The results showed that the method is robust and practical, and has higher resolution in velocity and in time compared with conventional method.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2001年第2期198-204,共7页
Oil Geophysical Prospecting
关键词
高分辨率
速度分析
瞬时相位
相位相关
统计假设检验
地震勘探
high - resolution, velocity analysis, instantaneous phase, phase correlation,statistical hypothetical test
