【摘要】 自从相干地震数据体概念被提出以来,许多学者提出了不同的基于相干性检测地质结构不连续性的算法。例如,基于特征结构的相干算法,局部结构熵算法以及第二与第一特征值比值算法等。本文基于小波变换具有多尺度多分辨率分析的优点,提出了在特定的小波变换分频瞬时属性上,利用局部结构熵算法来检测地震数据的局部不连续性。实际地震资料检测结果表明,基于分频瞬时相位的局部结构熵算法更能有效地检测到地震数据的细微变化,对于油气藏的精细刻画有重要意义。更多还原

【Abstract】 Since the coherency cube was introduced,many researchers have proposed different local discontinuity measures,such as eigenstructure-based coherency estimates,local structural entropy measure and the ratio of the second and the first eigenvalue.Local structural entropy measure in frequency division is put forward to detect local discontinuities of seismic data,by the virtue of the instantaneous attributes based on wavelet transform.The results of the real data demonstrate the effectiveness of local structural entropy measure on the basis of instantaneous frequency in division on detecting small discontinuities,which is of importance to field description.更多还原