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A Comprehensive Experimental and Simulation Study of Zeta Potential at Carbonate-brine Interface for Calcite and Dolomite Particles by Mohsen Zarean; Rafat Parsaei; Azim Kalantariasl is a Chemical Engineering article available to read on EtoBox.

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Despite numerous investigations, there is still no consistent and comprehensive understanding of the behavior of rock-brine interaction during low salinity waterflooding. This study aimed to address this issue by conducting a fundamental investigation of rock-brine interaction for calcite and dolomite rock samples across a wide range of salinity (including SW,2,5,10,20, 50 dSW, and FW),, and brine composition, with surface charge considerations using zeta potential data. To prepare solutions for zeta potential measurements, carbonate powder was added to brine at a concentration of 1 wt%, and the target pH was set by using very diluted NaOH and HCl solutions. In addition, zeta potentials for calcite and dolomite were simulated with a geochemical software package (PHREEQC). Results showed that decreasing salinity or adding sulfate ions to certain values reduced the zeta potential to more negative values. The trend of zeta potential versus pH depended on salinity, descending at low salinities and remaining constant or ascending at high salinities. By considering the expansion of the double layer, 20 and 10-times diluted seawater showed optimum conditions to make the most negative zeta

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Author

Mohsen Zarean; Rafat Parsaei; Azim Kalantariasl

Publisher

Elsevier BV

Published

2024

Language

EN

Field

Chemical Engineering (Physical Sciences)