基于BISQ模型双相各向同性介质中地震波数值模拟

SEISMIC MODELING IN ISOTROPIC POROUS MEDIA BASED ON BISQ MODEL

基于BISQ机制 ,推导了双相各向同性介质中弹性波数值模拟方程 ,并借助交错网格有限差分方法进行了波场模拟。证实了三种波 (快纵波、慢纵波、横波SV)的存在和波场特征 ;在合成地震记录中 ,观测到三种波的反射 ,由于各种波相互之间的转换 ,转换波在地震记录中显示也很清楚 。

Based on BISQ model, the equation of seismic wave propagation in isotropic poro us media was derived, and the staggered-grid finite-difference algorithm was use d to simulate wave field. On the snapshot, the existence of 'fast' compressio nal wave P1, 'slow' compressional wave P2 and shear wave SV was verified. In the synthetic experiment, the reflection waves of P1?P2, and SV was found. Bec ause of the conversion between different kinds of waves, the converted waves i n record were showed clearly, which made the wave field much more complex.