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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 Karman type is introduced into the anisotropic wave equation of viscoelasticity and is simulated by the staggered grid technique. The results show that the wave field in this heterogeneous composite medium not only reflects the regular anisotropic viscoelasticity but also the randomness of the medium. The concrete manifestation is as follows: expansion and contraction, shearing quality factor caused a significant amplitude attenuation; under the same variance conditions, the smaller the scale the greater the disturbance intensity of the random medium. It provides a useful reference for further studying the basic characteristics of fractured reservoirs.