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.
出处
《计算物理》
CSCD
北大核心
1998年第5期119-124,共6页
Chinese Journal of Computational Physics
关键词
孔隙地层
共振
孔隙度
渗透率
porous formation
resonance
porosity
permeability.
