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    • 4. 发明公开
    • A method for attenuating undesirable data, such as multiples, using constrained cross-equalization
    • 一种用于不需要的数据,如多个由计数器平衡的装置强制的抑制方法。
    • EP0515188A2
    • 1992-11-25
    • EP92304617.1
    • 1992-05-21
    • WESTERN ATLAS INTERNATIONAL, INC.
    • Monk, David J.Wason, Cameron B.
    • G01V1/36
    • G01V1/364G01V2210/56
    • To eliminate undesirable energy recorded during seismic surveying, a trace that models the undesirable energy on the recorded data trace is prepared. The model trace is first estimated using a suitable technique, such as wavefield extrapolation. Then, the model trace is modified using a best estimate of the amplitude, phase and time delay differences between the model trace and the data trace. The estimated amplitude, phase and time delay differences may be used to design a cross-equalization filter, which is used to cross-equalize the model trace with the data trace. Alternatively, the best estimate determination may include using a weighted sum of the model trace, its imaginary component, and their derivatives. When weighted and summed together, these components form a cross-equalized model trace that closely approximates the undesirable energy on the recorded data trace. Lastly, the cross-equalized model trace is subtracted from the data trace to substantially eliminate the undesirable energy.
    • 为了消除地震勘测过程中记录不良能量,痕迹做了模型不可取精力准备记录的数据跟踪。 如波场外推:该模型跟踪是使用合适的技术,颜色第一估计。 然后,该模型跟踪使用的模型和跟踪数据轨迹之间的幅度,相位和时间延迟差的最佳估计修改。 所估计的幅度,相位和时间延迟差可以用来设计一个跨均衡滤波器,所有这一切都被用于交均衡与跟踪数据的模型轨迹。 可替代地,最佳估计确定可以包括使用该模型跟踪,它的虚分量,以及它们的衍生物的加权和。 当加权并相加在一起,论文组分形成交均衡模型跟踪并非常接近不期望的能量上所记录的数据跟踪。 最后,横均衡模型跟踪从数据轨迹中减去,以基本上消除不希望的能量。