三维F-X域粘弹性波动方程保幅偏移方法

吕　彬; 李　斐; 李振春; 叶月明

doi:10.3969/j.issn.1673-8926.2007.01.016

岩性油气藏 >

2007 , Vol. 19 >Issue 1: 86 - 91

DOI: https://doi.org/10.3969/j.issn.1673-8926.2007.01.016

地球物理

三维F-X域粘弹性波动方程保幅偏移方法

吕　彬 ,
李　斐 ,
李振春 ,
叶月明

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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

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

网络出版日期: 2007-03-15

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

LU Bin ,
LI Fei ,
LI Zhenchun ,
YE Yueming

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1. Northwest Branch , Research Institute of Petroleum Exploration and Development , PetroChina;
2. Institute of Geology , Chinese Academy of Geological Sciences

Online 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

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吕　彬 , 李　斐 , 李振春 , 叶月明 . 三维F-X域粘弹性波动方程保幅偏移方法[J]. 岩性油气藏, 2007 , 19(1) : 86 -91 . DOI: 10.3969/j.issn.1673-8926.2007.01.016

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

参考文献

[1] Yang Wuyang,Yang Wengcai. Finite-difference migration with compensation for absorption dispersion and transmission losses in seismic data[A].CPS/SEG[C].2003,447-449.
[2]　杨午阳,Hou zhuzhang,茅金根,等.F-X域粘弹性波动方程保幅偏移[J].石油物探,2003,42(3):285-288.
[3]　杨午阳.粘弹性波动方程保持振幅偏移技术研究[D].中国地质科学院博士学位论文,2004.
[4]　马海珍,杨午阳,梁秀文,等.省时2D叠前深度偏移[J].石油物探,2002,41(2):144-148.
[5]　Lee M,Suh S.Optimization of one way equation[J].Geophysics,1985,50:1634-1637.
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[9]　Mittet R, Sollie R, Hoks tad K. Prestack depthmigration with compensation for absorption and dispersion[J].Geophysics,1995,60:1485-1494.

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