摘要
多组任意夹角直立裂隙的排列方式比单组平行排列直立裂隙更具一般性,因此本文基于线性滑动理论和Hudson理论,将上述多组任意夹角直立裂隙介质等效为单斜各向异性介质,给定物性参数计算刚度矩阵,运用交错网格高阶有限差分法求解三维单斜介质弹性波一阶速度-应力方程来模拟弹性波在单斜介质中的传播过程.通过分析不同物性下的波场和共炮点道集,不同偏移距下的方位角道集,说明裂隙物性与波场特征之间的关系,以及其方位特征信息.
The arrangement of multiple sets vertical fractures of arbitrary angle is more general than a single group parallel arranged vertical fractures,therefore,based on the linear slip theory and the Hudson theory,multiple sets vertical fractures of arbitrary angle are equivalent to monoclinic anisotropic media in this paper,given the physical parameters to calculate the stiffness matrix,using high order staggered grid finite difference method to solve the threedimensional elastic wave one order velocity-stress equation in monoclinic media,to simulate the propagation of elastic wave in monoclinic media. By analyzing the wave fields and common shot gathers under different physical properties,azimuth gathers under different offsets,to illustrate the relationship between the physical properties of features and the wave field,as well as its azimuthal feature information.
出处
《地球物理学进展》
CSCD
北大核心
2016年第2期525-536,共12页
Progress in Geophysics
基金
国家重点基础研究发展计划(973)多元多尺度地震物理信息映射关系及反演(2013CB228604)资助
关键词
任意夹角直立裂隙
单斜各向异性
线性滑动理论
交错网格
三维正演模拟
vertical fractures media of arbitrary angle
monoclinic anisotropic
the linear slip theory
staggered grid
three dimensional seismic modeling
