摘要
将Von Karman型的随机各向同性背景引入粘弹性单斜各向异性波动方程,并应用交错网格技术进行模拟。结果表明在这种非均匀复合介质中波场特性既体现了规律性较强的粘弹性单斜各向异性性质,又体现了介质的随机性特点。具体表现为:胀缩、剪切品质因子造成了振幅的显著衰减;相同方差条件下,尺度越小随机介质干扰强度越大。为进一步研究裂隙型油气藏基本特征提供了有益的参考。
The random isotropic background of Von Kraman pattern is introduced into wave equations of viscoelastic monoclinic anisotropic media. The snap-shots and synthetic seismograms in this nonhomogeneous complex media are simulated by staggered grid finite difference. The result shows following chacacteristics： wave field in this complex media embodies the characteristics of both monoclinic media and random media; dilatational and shear quality factors attenuate the amplititude obviously. In detail, the scale length became smaller, the disturbance caused by random media became the stronger for the case of same variance. This work should be helpful to understand the basic characteristics of the fracture oil reservoirs.
出处
《西北地震学报》
CSCD
北大核心
2009年第1期35-39,共5页
Northwestern Seismological Journal
关键词
随机介质
粘弹性单斜介质
尺度
方差
油气藏
Random media
Viscoelastic monoclinic media
Scale
Variance
Oil reservoir
