摘要
苏庆新．低频下岩石的电学模型和介电频散的关系．测井技术，１９９９，２３（２）：１２７～１３２在低频段（１００Ｈｚ～１０ＭＨｚ）应用两电极法测量的岩样，在不同含水饱和度和地层水矿化度下的电阻抗和电纳均存在着明显的频散现象。实验表明，岩石阻抗或导纳是岩石组成成分物性参数及电性参数的非线性函数。在低频下应用常规导电模型由阻抗或导纳测量值计算出的岩石电导率和介电常数，可出现异常值。根据岩石的导电和极化机理，给出一个含水岩石的电学模型，可较好地解释和描述岩石的介电频散现象。
Electrical impedance and susceptance of
rock samples fully and partially saturated with brine of different concentrations, which
are measured by two electrode measuring method at low frequency ranging from 100
Hz to 10 MHz, are of obvious frequency dispersion. Experiments show that both the
real and imaginary parts of the admittance are affected by the conductivity, the
permittivity of the rock constituents and the rock pore structure. In the conventional
conduction model, the conductivity and the dielectric constant of the rock calculated by
the admittance at low frequency are extremely high. The interfacial polarization
frequency is found to be inversely proportional to the resistivity of the pore fluid.
Based on the conduction and polarization mechanisms of rock, an electrical model of
rock is presented, which can be used to explain the dielectric frequency dispersion of
the rock.
出处
《测井技术》
CAS
CSCD
北大核心
1999年第2期127-132,共6页
Well Logging Technology
关键词
电模型
介电常数
孔隙结构
岩石
导电
极化
油层
electrical model dielectic constant interface feature pore structure
low frequency
