2018_EJRNL_PP_TONGCHENG_HAN_1.pdf
Terbatas  
» Gedung UPT Perpustakaan
Terbatas  
» Gedung UPT Perpustakaan
Accurate determination of the dielectric properties of porous rocks is important for the dielectric exploration
methods in a range of applications from water resources to petroleum industry. Carefully controlled laboratory
measurements offer the bestway of obtaining the dielectric behaviors but theywill require relatively large quantity
of sample materials prepared in specific shapes, which is not always available. Numerical and theoretical
simulations compensate for this weakness and can compute the dielectric dispersion at the pore-scale level on
small fragments of rocks. However, whether consistent dielectric results can be obtained from the numerical
computation and from the properly developed theoretical models still needs investigation. We introduced in
this paper the numerical model based on the three-dimensional finite difference method (3D-FDM) and a
range of theoretical models on basis of interfacial polarization for the calculation of the frequency dependent
dielectric properties in porous rocks of complex geometry. The numerical and theoretical models were applied
to a hypothetical porous rock with ideal shaped grains and to a real synthetic sandstone sample with complex
pore and grain structure. Comparison of the simulation results from the two methods showed excellent agreement
with each other with squared correlation coefficients better than R2=0.98 for both relative permittivity
and conductivity of the two example rocks. The consistent numerical and theoretical results provide a complementary
way for the numerical and theoretical models to work together for a better simulation of the dielectric
properties of porous rocks.