转换波波动方程叠前深度偏移  

WAVE EQUATION PRE-STACK DEPTH MIGRATION FOR CONVERTED WAVE

作　　者：刘奇琳[1,2,3] 

机构地区：[1]中国石油化工股份有限公司西南分公司博士后科研工作站,成都610081 [2]中国石油化工股份有限公司西南油气分公司,成都610000 [3]中国石油化工股份有限公司西南油气分公司勘探开发研究院德阳分院,德阳618000

出　　处：《物探化探计算技术》2012年第2期198-203,9,共6页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：克希霍夫叠前时间偏移被广泛运用于转换波地震成像领域,该方法具有计算效率高、速度模型易于获取的优点。但是,纵横波速度差使纵波和转换波的成像在时间域不匹配,且克希霍夫偏移也无法较好地处理多次到达和保幅等问题。这里提出一种基于波动方程的转换波叠前深度偏移方法,以改善克希霍夫时间偏移的不足。Kirchhoff pre-stack time migration has being widely used in the field of converted wave imaging. This method has two advantages,high computational efficiency and acquiring velocity model easily.However,for the velocity discrepancy between P and S wave,the images cannot correspond to each other at temporal domain,and Krchhoff migration cannot handle problems well, such as multi-path,amplitude preservation.In the paper,we introduce a converted wave migration based on wave equation,which supposed to overcome the shortcoming of kirchhoff time migration.

关 键 词：转换波 叠前深度偏移 偏移速度分析 

分 类 号：P631.4[天文地球—地质矿产勘探]