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Durham University

Department of Earth Sciences


Publication details

Rezaei Gomari, Sina Amrouche, Farida Santos, Ronaldo G. Greenwell, Hugh Christopher & Cubillas, Pablo (2020). A New Framework to Quantifying the Wetting Behaviour of Carbonate Rock Surfaces Based on the Relationship between Zeta Potential and Contact Angle. Energies 13(4): 993.

Author(s) from Durham


This study introduces a new framework to quantify the wettability of powdered carbonate
rock from existing correlations between zeta potential and contact angle. The new framework has
the potential to be faster and cheaper than conventional approaches and could increase confidence
in surface wetting quantification, since the results are insensitive to the inherent heterogeneity of
rock surfaces. The obtained results from experiments were used to develop a set of equations for
determining the carbonate rock contact angle from streaming potential data. The equations were
validated for the evaluation of changes in the wettability of carbonate rock using different stearic acid
oily solutions. The contact angles calculated from the proposed equations were then compared with
measured values on the calcite surface. The results show that the proposed framework was able to
quantify the wettability of carbonate rock with an acceptable range of error of about 4%–14%.