【摘要】 Biot的孔隙介质理论描述了地震波动力学特征与油藏参数(孔隙度、渗透率、粘度等)之间的关系。声波模型方法可用来研究碳氢油气藏特征。本文基于Biot声波方程提出一种二维有限差分方法,可用来模拟孔隙介质低频声波传播。文中讨论了边界条件,网格频散等问题,模拟了一个孔隙介质层状模型,并给出了其时间剖面和快照。更多还原

【Abstract】 Biot’s porous media theory describes the relationship between dynamic characteriza-tion of seismic waves and reservoir parameters, such as porosity, permeability and viscosi-ty. The acoustic modeling method can be applicated to investigate the characteristics ofhydrocarbon reservoirs. Based on Biot’s acoustic equation, this paper presented a twodi-mensional finitedifference method which involves numerical simulation of lowfrequence a-coustic wave propagation in porous media. Some problems such as boundary conditionsand grid dispersion are discussed. A fluid-filled.layered porous media model is simulatedusing this method, and its synthetic cross well seismograms and time snapshots areshown.更多还原