Petroleum Science >2015, Issue 1: 104-113 DOI: https://doi.org/10.1007/s12182-015-0015-z
Study of the properties of non-gas dielectric capacitors in porousmedia Open Access
文章信息
作者：Hong-Qi Liu,Yan Jun and You-Ming Deng
作者单位：
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China e-mail: lhqjp1@126.com;Centrica Energy (E&P) Upstream Kings Close, 62 Huntly Street, Aberdeen AB 101 RS, UK;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China e-mail: lhqjp1@126.com
投稿时间：2014-04-02
引用方式：Liu, HQ., Jun, Y. & Deng, YM. Pet. Sci. (2015) 12: 104. https://doi.org/10.1007/s12182-015-0015-z
文章摘要
The size of pores and throats is at the nanometer
scale in tight oil and shale gas zones, and the
resistivity of these reservoirs is very high, so the reservoirs
show more dielectric properties than conductivity properties.
The conductive and dielectric characteristics of a
parallel plate capacitor full of fresh water, NaCl solutions,
and solid dielectrics, for example, sands are investigated in
this paper, and the capacitance data of the non-gas capacitor
are measured at different salinities and frequencies by a
spectrum analyzer. The experimental results illustrate that
the capacitance of this kind of capacitor is directly proportional
to the salinity of the solutions and inversely
proportional to the measuring frequency, the same as a
vacuum parallel plate capacitor. The remarkable phenomenon,
however, is that the capacitance is inversely proportional
to the square of the distance between two plates.
The specific characteristic of this capacitor is different
from the conventional parallel plate capacitor. In order to
explain this phenomenon, the paper proposed a new concept,
named ‘‘single micro ion capacitor’’, and established
a novel model to describe the characteristics of this particular
capacitor. Based on this new model, the theoretical
capacitance value of the single micro ion capacitor is
calculated, and
scale in tight oil and shale gas zones, and the
resistivity of these reservoirs is very high, so the reservoirs
show more dielectric properties than conductivity properties.
The conductive and dielectric characteristics of a
parallel plate capacitor full of fresh water, NaCl solutions,
and solid dielectrics, for example, sands are investigated in
this paper, and the capacitance data of the non-gas capacitor
are measured at different salinities and frequencies by a
spectrum analyzer. The experimental results illustrate that
the capacitance of this kind of capacitor is directly proportional
to the salinity of the solutions and inversely
proportional to the measuring frequency, the same as a
vacuum parallel plate capacitor. The remarkable phenomenon,
however, is that the capacitance is inversely proportional
to the square of the distance between two plates.
The specific characteristic of this capacitor is different
from the conventional parallel plate capacitor. In order to
explain this phenomenon, the paper proposed a new concept,
named ‘‘single micro ion capacitor’’, and established
a novel model to describe the characteristics of this particular
capacitor. Based on this new model, the theoretical
capacitance value of the single micro ion capacitor is
calculated, and
关键词
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NaCl solution Debye model Single microion capacitor Dielectrics Micro capacitivity