反偏移法三维波动方程正演

英文篇名：3-D wave equation forward modeling by inverse migration
中文刊名：石油地球物理勘探
英文刊名：Oil Geophysical Prospecting
作者：陈必远 ; 金胜汶 ; 马在田
英文作者：Chen Biyuan ; Jin Shengwen and Ma Zaitian (Geophysical Exploration Corporation ; Daqing Petroleum Administration ; Xinwujing ; Daqing City ; Hei－longjiang Province ; Postcode ; 163357)
中文关键词：偏移 ; 三维 ; 波动方程 ; 正演 ; 逆偏移
英文关键词：migration ; three dimensions ; wave equation ; forward modeling ; inverse migration
出版日期：1994-02-15
机构：大庆石油管理局物探公司研究所!163357,上海同济大学海洋地质与地球物理系,上海同济大学海洋地质与地球物理系
年：1994
期：01
出版单位：石油地球物理勘探

摘要

三维地震资料的处理与解释往往都需要三维正演模型给予验证，以得到准确的处理、解释结果。本文提出的三维正演方法是一种偏移算法的逆运算方法──有限差分反偏移法。这一算法具有其法简单、运算是小及深度方向分辨率高的特点，是一种快速、高精度的正演算法。反偏移法虽是偏移算法的逆运算法，却出现常规偏移算法中所没有的很多问题。为此，本文进行了三种不同反偏移方法试验，并采用了一种新的浮动坐标变换，使正演结果精度得到很大提高。实际算例也证明，反偏移法三维波动方程正演方法是一种快速、高精度的算法。
The processing and interpretation of three-dimensional seismic data are usuallychecked by three-dimensional forward modeling so that satisfactory results can beobtained successfully. The three-dimensional forward modeling used here is the fi-nite difference inverse migration,the inverse operation of migration computation. Itis a fast accurate forward method because of its simplicity,small computation andhigh vertical resolution. The inverse migration involves many new problems whichordinary migration aon't have;therefore,three inverse migration methods are testedhere. Floating coordinate transform is introduced to greatly improve forward modeling. lt is practically shown that the three-dimensional wave equation forward model-ing by inverse migration is fast and accurate.

引文

1马在田著。地震成像技术,石油工业出版社,北京,1989
2马在田编.三维地震勘探方法,石油工业出版社,北京,1989
3 Zhiming Li.Compensating finite-difference errors in 3-D migration and modeling.Geophysics,1991,56(10):1650～1660