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REMOVAL OF SURFACE-RELATED WAVE PHENOMENA - THE MARINE CASE

机译:去除表面相关的波现象-海洋情况

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摘要

Removal of the effects of the free surface from seismic reflection data is an essential preprocessing step before prestack migration. The problem can be formulated by means of Rayleigh's reciprocity theorem which leads to an integral equation of the second kind for the desired pressure field that does not include these free-surface effects. This integral equation can be solved numerically, both in the spatial domain and in the double Radon domain. Solving the integral equation in the double Radon domain has the advantage of reducing the computation time significantly since the kernel of the integral equation becomes dominant diagonally. Two methods are proposed to solve the integral equation: direct matrix inversion and a recursive subtraction of the free-surface multiples using a Neumann series. Both methods have been developed and tested on a synthetic data set, which was computed with the help of an independent forward-modeling scheme. [References: 5]
机译:从叠层地震反射数据中消除自由表面的影响是叠前偏移之前必不可少的预处理步骤。可以通过瑞利互易定理来表达该问题,该定理导致针对所需压力场的第二类积分方程,其中不包括这些自由表面效应。该积分方程可以在空间域和双Radon域中进行数值求解。由于积分方程的核在对角线占主导地位,因此在双Radon域中求解积分方程具有显着减少计算时间的优势。提出了两种方法来求解积分方程:直接矩阵求逆和使用Neumann级数对自由表面倍数进行递归减法。两种方法均已在综合数据集上开发和测试,该综合数据集是借助独立的正向建模方案进行计算的。 [参考:5]

著录项

  • 来源
    《Geophysics》 |1996年第1期|p. 202-210|共9页
  • 作者单位

    DELFT UNIV TECHNOL DEPT MIN & PETR ENGN SECT TECH GEOPHYS POB 6028 2600 GA DELFT NETHERLANDS;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

  • 入库时间 2022-08-18 00:20:07

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