摘要
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,弹性波衰减和频散的问题已被广泛研究;然而基于BISQ方程的波场数值模拟尚未见到公开的报道.本文从BISQ方程出发,利用交错网格方法对横向各向同性孔隙介质中不同频率和相界情况,以及双层介质中的弹性波传播进行数值模拟,研究了在同时考虑两种流动机制作用情况下地震波和声波的传播特性及传播过程中出现的各种波动现象.
The Biot and squirt-flow are the two most important mechanisms of fluid flow in the porous medium with fluids. Based on the BISQ (Biot-Squirt) model where the two mechanisms are treated simultaneously, dispersion and attenuation of elastic waves in the porous medium are widely investigated in recent years. However, no numerical simulation based on the BISQ equation has been reported yet. In this paper, following the BISQ equation, elastic wave propagation in the transversely isotropic porous medium filled with fluids is simulated by the staggered grid method for different frequency and phase boundary cases and the two-layer medium. And propagating characteristics of seismic and acoustic waves and various phenomena occurred in the propagating process are investigated when the two mechanisms are considered simultaneously.
出处
《地震学报》
CSCD
北大核心
2002年第6期599-606,共8页
Acta Seismologica Sinica
基金
国家自然科学基金(40174012)
中国石油天然气集团公司物探重点实验室开放基金(GPKL01104)共同资助项目.
