SEISMIC TRACE INTERPOLATION IN THE F-X DOMAIN
SEISMIC TRACE INTERPOLATION IN THE F-X DOMAIN
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DOI：
10.1190/1.1443096
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发表时间：
1991-06-01
期刊：
影响因子：
3.3
通讯作者：
SPITZ, S
中科院分区：
文献类型：
--
作者：
SPITZ, S
地震道内插是在数据集存在空间混叠时改善偏移的有效手段。 标准插值方法的一个主要困难是，它们依赖于各种地质事件可以分离的可靠程度。 在这方面，一个多通道内插方法，既不需要先验知识的横向相干的事件的方向，也不估计这些directions.The方法是基于这样一个事实，即线性事件中存在的一个部分，由等距道可以被精确地内插，而不管原来的空间间隔，没有任何尝试，以确定其真正的倾角。 f-x域中线性事件的可预测性允许缺失的道被表示为线性系统的输出，线性系统的输入由记录的道组成。 插值算子是通过求解一组线性方程组而得到的，方程组的系数仅取决于由记录道定义的空间预测滤波器的频谱.合成实例表明，该方法对随机噪声不敏感，并能正确处理曲率和横向振幅变化. 用一个真实的数据集对该方法进行了评估，结果表明，该插值方法得到了改进的偏移剖面。
Interpolation of seismic traces is an effective means of improving migration when the data set exhibits spatial aliasing. A major difficulty of standard interpolation methods is that they depend on the degree of reliability with which the various geological events can be separated. In this respect, a multichannel interpolation method is described which requires neither a priori knowledge of the directions of lateral coherence of the events, nor estimation of these directions.The method is based on the fact that linear events present in a section made of equally spaced traces may be interpolated exactly, regardless of the original spatial interval, without any attempt to determine their true dips. The predictability of linear events in the f-x domain allows the missing traces to be expressed as the output of a linear system, the input of which consists of the recorded traces. The interpolation operator is obtained by solving a set of linear equations whose coefficients depend only on the spectrum of the spatial prediction filter defined by the recorded traces.Synthetic examples show that this method is insensitive to random noise and that it correctly handles curvatures and lateral amplitude variations. Assessment of the method with a real data set shows that the interpolation yields an improved migrated section.