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当不同时期采集的地震剖面相交时,常常会产生闭合差。闭合差可以由不同的振幅、时间或不同的子波特征引起。我们通过把标量因子、静态时移和相位旋转用到各条测线上,就可以基本上校正这些闭合差。 本文描述了计算2D地震测线上各个交点的振幅,时间和相位差的公式。然后用迭代最小平方法求各条测线的最佳闭合差校正值。计算中对极小平方法作了必要的修改,使其适用于非线性相位数据。所采用的各种算法均可靠、快速和精确。我们用这种方法在人机联作工作站进行地震解释已有5年。标量闭合差校正值大大增强了地震数据的一致性。 本文给出了闭合差处理程序包在5个同期地震数据组成的20条测线测量中的应用结果。最终闭合差校正大大提高了20条测线间的拟合程度。
Closure differences often occur when the seismograms collected during different periods intersect. Closure differences can be caused by different amplitudes, times or different wavelet features. By applying scalar, static time-shift, and phase rotation to each line, we can essentially correct these closure differences. This article describes the formula for calculating the amplitude, time and phase difference at each intersection of a 2D seismic line. Then use the iterative least square method to find the best closed difference correction for each line. The calculation of the minimum level method made the necessary changes to make it suitable for nonlinear phase data. The algorithms used are reliable, fast and accurate. We have used this method for seismic interpretation in human-computer interworking stations for five years. The scalar closing difference correction greatly enhances the consistency of seismic data. In this paper, we present the application results of the closed difference processing package in 20 line measurements composed of 5 simultaneous seismic data. The final closing difference correction greatly improves the fit between 20 lines.