砂岩双相介质孔隙度地震波场数值模拟研究  

Numerical Simulation on Two-phase Media Seismic Wave Field of Sandstone

作　　者：黄琪嵩[1] 于师建[2] 郭龙[2] 

机构地区：[1]北京市地质矿产勘查开发总公司,北京100050 [2]山东科技大学矿山灾害预防控制实验室,山东青岛266590

出　　处：《工程地球物理学报》2014年第1期95-100,共6页Chinese Journal of Engineering Geophysics

基　　金：山东省自然科学基金(编号:ZR2011DM014)资助

摘　　要：为了研究煤系含水砂岩的双相介质地震波场特性,用Biot双相介质数学模型描述煤系含水层。本文应用交错网格有限差分方法对煤系含水砂岩双相介质模型的孔隙度进行了地震波场数值模拟,模拟结果显示双相介质中孔隙率大小对慢纵波有较大的影响,主要表现在随着砂岩孔隙度的增大,慢纵波的传播速度也随着增大。利用双相介质理论探索地震波场对砂岩孔隙度响应特性,对了解煤系砂岩的富水性以及孔隙特性具有现实意义和理论价值。To researchs eismic wave field characteristics of aquiferous sandstonein coal measures, we describe the coal measures aquifer by the mathematical model of Biot two-- phase media Numerical simulation of the seismic wave field of two--phase media in the coal measures aquiferous sandstone was implemented by staggered grids finite difference. Simu- lation results show that the size of porosity has a greater impact on the slow longitudinal wave. Mainly reflected in the slow longitudinal wave propagation velocity increases with the increase of porosity. Using the theory of Biot two--phase medium explores seismic wave field response to sandstone porosity, which has theoretical value and practical signifi- cance to understand coal measures of sandstone and pore characteristics.

关 键 词：Biot双相介质 地震波 数值模拟 孔隙度 

分 类 号：P631.4[天文地球—地质矿产勘探]