Approximation of electrical double-layer thickness in hydrocarbon systems flowing through the pores of reservoir rocks

This article evaluates the effects of overlap of the diffuse layers in the narrow capillaries of the reservoir rock cores in oils. Methods were developed to estimate the double-layer thickness in hydrocarbon systems, and to predict the effects of double-layer overlap on the streaming current and hence on the calculation of surface potentials for flat-sided capillaries. These methods are used to interpret results from sandstone cores in crude oil and hydrocarbon solvents. The estimation of double-layer thickness in non-aqueous solvents on the basis of 1:1 charge carriers by analogy to water systems, with correction for viscosity and permittivity differences provides good results with respect to those from streaming current measurements.PMID:37734251 | DOI:10.1016/j.cis.2023.102985

Source: Advances in Colloid and Interface Science - September 21, 2023 Category: Chemistry Authors: Saad F Alkafeef Source Type: research