孔隙地层探井中首波的共振与衰减的数值研究  

NUMERICAL RESEARCH OF HEAD WAVE IN A FLUID FILLED BOREHOLE SURROUNDED BY A POROUS MEDIUM

作　　者：罗朝盛[1] 董庆德 王克协[2] 

机构地区：[1]杭州应用工程技术学院电机系 [2]吉林大学物理系

出　　处：《计算物理》1998年第5期119-124,共6页Chinese Journal of Computational Physics

摘　　要：通过对孔隙地层探井中第一类纵波（首波）的激发和传播特性进行了较为系统的数值研究，得到了首波具有一系列的共振峰激发谱。证明了孔隙地层探井中首波也具有共振与衰减特性，但与均匀固体地层探井中情况不同，其共振振幅随频率增加呈先增后减的趋势，油储参数—孔隙度和渗透率κ对共振频率的影响甚微，而对共振振幅的影响较大，随和κ的增大，共振振幅明显下降。Through the computer numerical experiment, it systematically studies the excitation and propagation properties of the head wave in a borehole surrounded by a porous medium,and proves that the head wave has the property of resonance and attenuation. However it is evidently different from the head wave in an oil well surrounded by homogeneous medium. The attenuation of the resonance peak amplitude appears first insreasing and then decreasing when the resonance frequency increases. The reservoir parameters——porosity (  ) and permeability (κ) of the porous medium have few influence on resonance frequency. But they have an evident effect on resonance peak amplitude, Which decrease when the porosity () and the permeability (κ) become larger.

关 键 词：孔隙地层 共振 孔隙度 渗透率 

分 类 号：P631.4[天文地球—地质矿产勘探] TE15[天文地球—地质学]