Impact of temperature and SO42- on electrostatic controls over carbonate wettability

Tetteh, Joel T.; Brady, Patrick V.; Ghahfarokhi, Reza Barati

doi:10.1016/j.colsurfa.2021.126893

Cited by 8 publications

(15 citation statements)

References 75 publications

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“…Figure 3 shows the ζ-potential prediction of the experimental data by Ding and Rahman. 34 The TLM in this work was compared to DLM previously developed in other publications 11 , 19 , 27 to show the fit to the experimental calcite–brine ζ-potential. Both TLM and DLM closely predicted the trends and magnitude of measured calcite–brine ζ-potential with respect to increasing Mg 2+ and SO 4 2– concentrations in seawater-like brines.…”

Section: Resultsmentioning

confidence: 99%

“…Other works have incorporated the amine groups in modeling the electrokinetics at the oil–brine interface; however, the DLM-based SCM approach was employed. 11 , 19 , 23 , 26 , 35 , 39 , 58 , 62 , 83 , 95 …”

Section: Resultsmentioning

confidence: 99%

“…The electrostatic interaction at the rock–brine interface was assembled using a pure and smooth calcite surface by assuming >CaOH and >CO 3 H as the primary hydration sites. 11 , 14 , 19 , 27 , 76 For the oil–brine interface, −COOH and −NH were assumed as the hydration sites, representing the carboxylic and amine groups, respectively, of a crude oil molecule. 11 , 27 , 30 , 58 , 77 The charge distribution ( Table 3 ), which indicated the placement of ions on different planes, was modeled similar to the approach by Ding and co-workers 34 , 78 and Heberling et al, 31 , 32 for the calcite–brine interface, and Takeya et al 30 for the oil–brine interface.…”

Section: Methodsmentioning

confidence: 99%

“… 34 , 78 , 85 The DLM presented in this work had been shown in our previous publications with all of the relevant reactions and equations. 11 , 19 , 27 …”

Section: Methodsmentioning

confidence: 99%

“…More details on the relevant equations in the TLM model can be found in the literature. 34,78,85 The DLM presented in this work had been 14,19,30,77 (specific surface area = 1 m 2 /g, 11,26 refer to 11,26,62 for equation used for site density calculation) shown in our previous publications with all of the relevant reactions and equations. 11,19,27 3.3.…”

Section: Methodsmentioning

confidence: 99%

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Ionic Interactions at the Crude Oil–Brine–Rock Interfaces Using Different Surface Complexation Models and DLVO Theory: Application to Carbonate Wettability

2022

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The impact of ionic association with the carbonate surface and its influence toward carbonate wettability remains unclear and is an important topic of interest in the current literature. In this work, a triple layer model (TLM) approach was used to capture the electrokinetic interactions at both calcite–brine and oil–brine interfaces. The developed TLM was assembled against measured ζ-potential values from the literature, successfully capturing the trends and closely matching the ζ-potential magnitudes. The developed TLM was compared to a diffused layer model (DLM) presented in previous works, with the DLM showing a better match to the ζ-potential values for seawater brine solutions. The ζ-potential values predicted from both surface complexation models (SCMs) were used to calculate the total interaction energy (or potential) based on the Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory. It was observed that low Mg 2+ and high SO 4 2– concentrations in modified composition brine (MCB) made the calcite–brine interface more negative. However, at the oil–brine interface, low Mg 2+ made the oil–brine interface more negative but high SO 4 2– concentrations slightly shifted the oil–brine ζ-potential toward negative. At the crude oil–brine–rock (COBR) interfaces, low Mg 2+ and high SO 4 2– concentrations in the MCB were observed to generate a greater repulsive interaction energy, which could trigger carbonate wettability alteration toward water wetness. The absolute sum of the ζ-potential at both interfaces was observed to be correlated to the total interaction potential at a 0.25 nm separating distance. Thus, an increase in the absolute sum of the ζ-potentials would generate a greater repulsive interaction potential and trigger wettability alteration. Therefore, these SCMs can be applied to design modified composition brine capable of triggering a repulsive interaction energy to alter carbonate wettability toward water wetness.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“… 34 , 78 , 85 The DLM presented in this work had been shown in our previous publications with all of the relevant reactions and equations. 11 , 19 , 27 …”

Section: Methodsmentioning

confidence: 99%