岩性油气藏 ›› 2007, Vol. 19 ›› Issue (1): 86–91.doi: 10.3969/j.issn.1673-8926.2007.01.016

• 地球物理 • 上一篇    下一篇

三维F-X域粘弹性波动方程保幅偏移方法

杨午阳1 , 杨文采2 , 刘全新1 , 王西文1   

  1. 1. 中国石油勘探开发研究院西北分院; 2. 中国地质科学院地质研究所
  • 出版日期:2007-03-15 发布日期:2007-03-15
  • 第一作者:杨午阳,男,博士,高级工程师,主要从事物探方法研究与地学软件开发工作。地址:(730020)甘肃省兰州市城关区雁儿湾路535号。电话:(0931)8686605。E-mail:yangwuyang@petrochina.com.cn

3D frequency and space domain amplitude-preserved migration with viscoelastic wave equations

YANG Wuyang1 , YANG Wencai2 , LIU Quanxin1 , WANG Xiwen1   

  1. 1. Northwest Branch , Research Institute of Petroleum Exploration and Development , PetroChina;
    2. Institute of Geology , Chinese Academy of Geological Sciences
  • Online:2007-03-15 Published:2007-03-15

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摘要：

提出了一种利用粘弹性声波波动方程进行三维偏移的新方法, 其基本思路是: 修改成像条件, 使修改后的成像方程中考虑振幅补偿, 然后利用粘弹性单程波动方程在F2X 域对震源和接收点波场进行延拓, 进而完成散射、透射等补偿。理论数据处理表明: 该方法理论基础可靠, 处理效果明显, 具有较好的推广应用前景。

关键词: 控制照明, 聚焦点, 逆时聚焦算子, 叠前深度偏移

Abstract:

The paper studied a new algorithm of 3D frequency and space domain amplitude-preserved migration with viscoelastic wave equations.This code gives an alternative method which compensates Q and transmission losses in the seismic data during scalar finite-difference migration.The geometrical spreading, Q and transmission losses and dispersion are compensated simultaneously as part of the migration.Firstly,starting from the viscoelastic wave equation, high-order finite-difference format of amplitude-preserved migration operator viscoelastic was derived.Secondly,the imaging condition was modified in order to include a ttenuation effecting in seismic propagating wavefield.Then,3D migration was realized by using a 3D one-way depth stepping extrapolation.Good processed results of synthetic data proved that algorithm is stable,reliable and widely applicable.

Key words: controlled illumination, focusing point, inverse focusing operator, prestack depth migration

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