基于高阶有限差分纵横波分解的弹性波数值模拟  

HIGH ORDER FINITE DIFFERENCE NUMERICAL SIMULATION OF ELASTIC WAVE WITH SEPARATED P WAVES AND S WAVES

作　　者：赵茂强[1,2] 吴国忱[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东青岛266555 [2]中国石化胜利油田分公司物探研究院,东营257022

出　　处：《物探化探计算技术》2010年第5期487-494,共8页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：常规弹性波数值模拟方法得到的VSP波场信息中,P波和S波是相互耦合在一起的,波场信息复杂,在进行多波多分量地震波场特征分析时需要进行波场分离。这里采用纵波、横波解耦的弹性波波动方程高阶有限差分算法进行数值模拟,并采用PML边界条件处理人工边界条件,得到纵波、横波解耦的独立VSP纵波、横波记录,为进一步研究弹性波VSP波场特征奠定了基础。In the VSP wave field information from general elastic wave numerical simulation method,the P waves and S waves are coupled together,and the wave field information is complexity.In order to analysis multi-wave and multi-component seismic wave field,we need to separate the wave field.In this paper,we present high order finite difference numerical simulation method using elastic wave equation with separated P wave and S wave,use the PML boundary conditions to deal with the artificial boundary conditions,and get the VSP records with separated P waves and S waves.It gives fundamental contributions to the further study of elastic wave VSP wave field characteristics.

关 键 词：弹性波 高阶有限差分 纵横波解耦 PML边界 

分 类 号：P618.130.8[天文地球—矿床学]