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Biot流动和喷射流动是含流体多孔隙介质中流体流动的两种重要力学机制。近年来利用同时处理这两种力学机制的BISQ(Biot-Squirt)模型,进行波场数值模拟只限于二维二分量或二维三分量情况,三维三分量的波场模拟尚未见报道。然而,只有三维模拟,才能全面认识双相各向异性介质中固相和流相弹性波场的耦合关系和空间分布特征。本文从BISQ模型的波动方程出发,采用交错网格高阶有限差分方法对三维双相各向异性介质的弹性波传播进行了数值模拟和波场分析,得到了较好的结果。
Biot flow and jet flow are two important mechanics of fluid flow in porous media containing fluids. In recent years, the BISQ (Biot-Squirt) model, which deals with both mechanical mechanisms, has been used to simulate wavefields only in two-dimensional two-dimensional or two-dimensional three-component cases. Wavefield simulation of three-dimensional three-component waves has not been reported yet. However, only the three-dimensional simulation can fully understand the coupling relationship and the spatial distribution of the solid-liquid and the elastic wave fields in the biaxial anisotropic media. In this paper, based on the wave equation of BISQ model, the staggered-grid high-order finite difference method is used to simulate the elastic wave propagation in three-dimensional bilaterally anisotropic media and analyze the wave field. The good results are obtained.