RESOLUTION COMPARISON OF MINIMUM-PHASE AND ZERO-PHASE SIGNALS
RESOLUTION COMPARISON OF MINIMUM-PHASE AND ZERO-PHASE SIGNALS
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DOI：
10.1190/1.1440469
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发表时间：
1974-12
期刊：
影响因子：
3.3
通讯作者：
M. Schoenberger
中科院分区：
文献类型：
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作者：
M. Schoenberger
尽管最小相位小波具有直观的吸引力，但它并不是在地震剖面上可以实现的最短小波。对于处理后的几个地震剖面的典型幅值谱，分别提出了最小相位小波和零相位小波。在每种情况下，几个长度测量表明，零相位子波比对应于相同幅值谱的最小相位子波更短。此外，零相位子波比相应的最小相位子波具有更小的旁瓣。使用零相位和最小相位信号作为输入来生成合成地震记录。在每种情况下，用零相位输入信号生成的地震记录都具有较好的分辨率。这种关系在定量上得到了证明，在地震图上也是显而易见的。除了比较小波的分辨率外，还比较了估计反射时间所允许的精度。零相位子波对两种反射时间的估计都更准确。
Despite their intuitive appeal, minimum‐phase wavelets are not the shortest wavelets achievable on a seismic section. For several amplitude spectra typical of processed seismic sections, both minimum‐phase and zero‐phase wavelets are presented. In each case, several measures of length reveal that the zero‐phase wavelet is shorter than the minimum‐phase wavelet corresponding to the same amplitude spectrum. Furthermore, the zero‐phase wavelet has smaller side lobes than the corresponding minimum‐phase wavelet. Synthetic seismograms were generated using both the zero‐phase and minimum‐phase signals as inputs. In each case, the seismogram generated with the zero‐phase input signal had better resolution. This relation is demonstrated quantitatively and is also visually obvious on the seismograms. In addition to comparing the wavelets’ resolution capabilities, the accuracies permitted in estimating reflection times were compared. The zero‐phase wavelets resulted in more accurate estimates of both reflection tim...