TITLE:
Streaming Potential and Zeta Potential Measurements in Porous Rocks
AUTHORS:
Luong Duy Thanh
KEYWORDS:
Streaming Potential Coefficient, Zeta Potential, Porous Media, Rocks, Electrolytes
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.6 No.11,
November
21,
2018
ABSTRACT: The measurements of the streaming potential coefficient and the zeta potential
of two consolidated samples saturated with four monovalent electrolytes
at different electrolyte concentrations have been performed. The experimental
results show that the streaming potential coefficient and the zeta potential
in magnitude both decrease with increasing electrolyte concentration for all
electrolytes. It is also shown that there is a dependence of the streaming potential
coefficient on types of electrolyte for a given sample. This is explained
by the dependence of the zeta potential and the electrical conductivity on
types of electrolyte. Additionally, the variation of the zeta potential with types
of electrolyte is also reported and qualitatively explained. From experimental
data on the streaming potential coefficient and the zeta potential, the empirical
expressions between the streaming potential coefficients, the zeta potential
and electrolyte concentration are also obtained. The obtained expressions
have the similar forms to those available in literature. However, there is a
deviation between them due to dissimilarities of fluid conductivity, fluid pH,
mineral composition of porous materials and temperature.