含孔隙层多层地震波场的矩阵算法及数值计算  

Matrix algorithm and numerical calculation of seismic wave field in porous multilayer medium.

作　　者：伍先运[1] 李幼铭[2] 王克协[1] 

机构地区：[1]吉林大学物理系 [2]中国科学院地球物理研究所

出　　处：《石油地球物理勘探》1993年第6期694-704,472,共12页Oil Geophysical Prospecting

基　　金：本项目由国家自然科学基金委员会;中国科学院;中国石油天然气总公司;大庆石油管理局联合资助"油储"项目的课题

摘　　要：目前,多层、均匀、各相同性和完全弹性半空间中地震波的激发、传播和衰减问题的理论与应用研究已日臻成熟。但对含孔隙层多层的地震波场研究甚少。为此,本文从 Biot 双相介质的波动方程组出发,严格推导了双相介质层中地震波场的完全解,得到了双相介质层的传递矩阵。其次,还给出了双相介质层用等效的均匀固体层替代后的处理办法。最后分别用埋于地表下浅处的爆炸点力、重直集中力和水平集中力作震源,对含双相介质层半空间自由表面的位移场作了计算,考察了油层储集参数、层位、层厚等因素的影响。At present,people have been successfully studying how seismic wave origi- nates,propagates and attenuates in an isotropic and full elastic multilayer half space.Little research on seismic wave field in porous multilayer medium has been done however.Full solution of seismic wave field in two-phase medium is then de- rived from Biot's wave equation system in two-phase medium,thus obtaining trans- mission matrix in the two-phase medium.A new data processing method is given which is applicable to the new medium where two-phase layer is replaced by equiva- lent homogeneous solid layer. By taking as seismic source the exploding point force,vertically concentrated force or horizontally concentrated force at shallow underground,we calculate the displacement field of free surface of half space consisting of two-phase medium,and analyse the influences due(?) reservoir parameters,horizon,bed thickness and so on.

关 键 词：孔隙层 地震波场 矩阵 算法 

分 类 号：P631.41[天文地球—地质矿产勘探]