Study on SEM Numerical Simulation of Airgun Signal Transition

详细信息   

• 责任者：Tang Jie (School of Geosciences ; China University of Petroleum ; Dongying 257061 ; China)
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(9)
• 关键词：空气枪 ; air guns ; 多孔介质 ; porous medium
• 页码：p.2348-2356
• 图表：illus., 29 refs.
• 分类号：1600
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

In order to study the wave field excited by signal gun, we deduce the seismic wave equation from the theory of porous media based on averaged method. We do the numerical simulation of seismic wave propagation by the spectral element method. We mainly do the following work： （1） We present a numerical implementation of the Biot equations for 2-D problems based upon the spectral element method （SEM）,the simulation result shows that SEM can simulate wave propagation effectively. （2） Validate the existence of the Blot＇s slow compressional wave. We study wave propagation at acoustic-poroelastic discontinuities. （3） study wave propagation in compacted sediments with gradients in porosity, influence of porosity on phase velocity. （4） As the reservoir bottom is limited, influence of fluctuant interface on wave propagation. demonstrate We the we investigate the???