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由偏移地震剖面确定深度的误差(errorbars)有两部分。第一部分是由于模型估计方案的失败,这一部分误差可以通过改善模型设计方案来降低。第二部分是由地震数据性质、地层特性和野外观测系统所产生,对于给定的数据集这部分是常量,可以定量地表示为偏移距、速度、反射面深度、于波频率、Q值和拾取精度的函数。该量值对任何方法获得的深度估计提供一种估计“最佳情况”误差(errorbar)的快速方法。如果对偏移深度剖面提供一个固有的深度误差表,这将是对解释数据库的一个非常有用的补充,因为它量化了限制地震深度估计的各种因素。
There are two parts to errorbars to determine depth from offset seismic sections. The first part is due to the failure of the model estimation scheme. This part of the error can be reduced by improving the model design scheme. The second part is generated by the nature of the seismic data, formation properties and field observation system. For a given data set this part is constant and can be quantitatively expressed as offset, velocity, depth of reflection surface, wave frequency, Q value and Function of picking accuracy. This measure provides a quick way to estimate the “best case ” errorbar for depth estimates obtained by any method. If you provide an inherent depth error table for the offset depth profile, this will be a very useful complement to interpreting the database as it quantifies the various factors that limit the depth of the seismic estimate.