Abstract

The problems with elastic wave reflection at the interface between the water/patchy saturated porous media and the underlying solid matrix are considered. When porous media is saturated by biphasic fluids, the patchy saturation theory can explain the wave dispersion and attenuation better than the classical Biot theory at mesoscopic scales. Based on patchy saturation theory, this paper focuses on the reflection of elastic waves by patchy saturated porous media inclusion in layered media. Using numerical calculation, the reflection coefficients with different excitation frequencies, water saturations, and porous media depths are discussed. The results show that the differences between two kinds of patchy saturated porous media cases in the oil-water model are lower than those between the same two cases in the gas-water model. Low water saturation and high water saturation have significant effects on the reflection coefficient.

中文翻译：

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平面波在水/斑块状饱和多孔介质与下层固体基质的界面处的反射

摘要

考虑了在水/斑块状饱和多孔介质与下面的固体基质之间的界面处弹性波反射的问题。当多孔介质被双相流体饱和时，在介观尺度上，斑块饱和理论可以比经典的比奥理论更好地解释波的色散和衰减。基于斑块饱和理论，本文重点研究层状介质中斑块状饱和多孔介质包裹体对弹性波的反射。通过数值计算，讨论了不同激发频率，水饱和度和多孔介质深度的反射系数。结果表明，油水模型中两种斑块状饱和多孔介质之间的差异要小于气水模型中两种相同情况之间的差异。。