通过随机相位编码策略加速与水底相关的多重地震迁移

IF 1.8 3区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Yanbao Zhang, Feng Hu, Yanzhi Hu
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引用次数: 0

摘要

海洋地震多参数比主参数包含更多的结构信息,因此在迁移时应加以考虑。然而,多重迁移会受到不良多重干扰产生的严重串扰。实践证明,与水底相关的多重迁移可以极大地抑制串扰。但是,如果考虑所有相关的连续阶乘,计算成本就会非常高。为了解决这个问题,我们提出了一种基于相位编码的多重迁移方法。首先,通过对连续阶乘和堆叠编码乘进行随机相位编码来创建超父。通过迁移超级祖,所提出的方法可以同时完成所有阶乘的迁移,从而大大降低计算成本。我们使用三层模型和冥王星 1.5 模型进行数值比较。结果表明,该方法可以检索到高质量的图像,并大大提高了计算效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seismic migration of water-bottom-related multiples accelerated by random phase-encoding strategy

Marine seismic multiples contain more structure information than primaries and should be considered in migrations. However, multiple migrations suffer from severe crosstalks generated by interferences among undesirable multiples. It has been proven that the water-bottom-related multiple migration can suppress crosstalks greatly. However, if all associated consecutive-order multiples are considered, the computation cost is extremely high. To settle this issue, a phase-encoding-based multiple migration is proposed. Supergathers are first created by randomly phase-encoding consecutive-order multiples and stacking-encoded multiples. By migrating supergathers, the proposed method can fulfil migrations of all order multiples simultaneously, thereby reducing the computation cost significantly. We use a three-layer model and the Pluto 1.5 model for numerical comparisons. The results reveal that the method can retrieve high-quality images and increase computation efficiency considerably.

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来源期刊
Geophysical Prospecting
Geophysical Prospecting 地学-地球化学与地球物理
CiteScore
4.90
自引率
11.50%
发文量
118
审稿时长
4.5 months
期刊介绍: Geophysical Prospecting publishes the best in primary research on the science of geophysics as it applies to the exploration, evaluation and extraction of earth resources. Drawing heavily on contributions from researchers in the oil and mineral exploration industries, the journal has a very practical slant. Although the journal provides a valuable forum for communication among workers in these fields, it is also ideally suited to researchers in academic geophysics.
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