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    基于反演的自适应虚同相轴层间多次波压制方法

    An inversion-based adaptive virtual events method for suppressing interbed multiples

    • 摘要: 层间多次波压制是提高地震数据处理及地震资料解释精度的关键环节之一。虚同相轴理论为完全数据驱动压制层间多次波提供了一种方法基础,但当层间多次波与一次波发生干涉时,匹配相减易造成一次波能量损伤。自适应虚同相轴层间多次波压制方法通过迭代降低了对匹配相减的依赖,但仍未能彻底解决该问题。为此,提出了一种基于反演的自适应虚同相轴层间多次波压制方法,该方法通过构建反演目标函数,利用反演技术估计层间多次波,避免了匹配相减的过程,在压制层间多次波的同时保留了一次波能量。实验结果表明,该方法在层间多次波压制精度和一次波振幅保持方面显著优于传统的自适应虚同相轴层间多次波压制方法,为后续地震数据处理和地震资料解释提供了更高质量的基础。

       

      Abstract: Interbed multiple suppression is a critical step affecting the accuracy of seismic data processing and interpretation. The virtual events theory offers a methodological basis for fully data-driven suppression of interbed multiples. However, the adaptive subtraction process tends to damage primary reflections when interbed multiples interfere with primaeies. The adaptive virtual events method, despite employing an iterative strategy, does not fully eliminate its reliance on adaptive subtraction. To overcome this limitation, we propose an inversion-based adaptive virtual events method that constructs an objective function to directly estimate interbed multiples through waveform inversion and thereby avoids adaptive subtraction. This method effectively suppresses interbed multiples while preserving primary energy. Experimental results demonstrate that the proposed method yields higher precision in suppressing interbed multiples and better preserves primary amplitude compared to the conventional adaptive virtual events method, thereby enhancing the data quality for subsequent seismic data processing and interpretation.

       

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