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《Chinese Journal of Geophysics》 2002-06
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WAVE-FIELD SIMULATION BASED ON THEBiot-Squirt EQUATION

YANG KUAN-DE 1,2)YANG DING-HUI 1)WANG SHU-QIANG 1) 1) Department of Mathematical Sciences, Tsinghua University, Beijing 100084, China2) Mengzi Teacher's College, Yunnan 661100, China  
The Biot-flow and squirt-flow mechanisms are two important mechanisms of fluid flow in porous media with fluids. The effects of the two mechanisms on propagation of seismic and acoustic waves are very important. Dvorkin and Nur presented an unified BISQ (Biot-Squirt) model, where the Biot and squirt-flow mechanisms are treated simultaneously. Although the attenuation and dispersion of the poroelastic waves have been widely investigated based on the model, so far as we know, no result about wave-field modeling based on the BISQ equation has been reported. In this paper, the wave-field simulation based on the BISQ equation in the isotropic medium is performed by using the FCT finite difference method, and the wave-field snapshots are compared with the results obtained from Biot's theory only including the Biot mechanism. Model results show that the seismic and acoustic propagations affected simultaneously by the Biot and squirt-flow mechanism are slower than those affected only by the Biot mechanism, and the slow P-wave attenuation based on the BISQ model is stronger than that based on the Biot model.
【Fund】: 国家自然科学基金 (4 0 1 740 1 2 );; 中国石油天然气集团公司物探重点实验室开放基金 (GPKL0 1 0 4) .
【CateGory Index】: P631
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