【摘要】 地震波在饱和孔隙双相介质中传播时,固—流相互作用同时存在。基于常用的Biot模型和BISQ模型,Mamadou和Erwin又提出了不含特征喷射流动长度的改进BISQ模型,这更便于描述且计算简单。但是,基于这一模型的地震波场数值模拟还未有公开报道。为此,基于改进的BISQ模型,运用有限差分法进行了地震波场数值模拟,其数值模拟结果表明,改进BISQ模型与BISQ模型的模拟结果保持一致,在一定条件下可以清楚地观测到快慢纵波和横波分裂,具有较好的可行性。更多还原

【Abstract】 The Biot-flow and Squirt-flow mechanisms are the basic mechanisms of fluid flow in saturation porous media.Based on the common Biot model and BISQ model.Mamadou and Erwin put forward the improved BISQ model which doesn’t involve in characteristic squirt-flow length for the convenience of description and simple calculation.Whereas,no public report on seismic wavefield numerical simulation regarding this improved BISQ model is discovered now.Therefore,based on the improved BISQ model,the paper applied the finite difference method to perform seismic wavefield numerical simulation,and its results indicated that the simulation result of the improved BISQ model was consistent with that of BISQ model,and the splitting of fast and slow P wave and S wave could be observed under certain conditions,so,the improved BISQ model was more feasible than ever before.更多还原